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WO2021129739A1 - 动力电池顶盖和动力电池 - Google Patents

动力电池顶盖和动力电池 Download PDF

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Publication number
WO2021129739A1
WO2021129739A1 PCT/CN2020/139014 CN2020139014W WO2021129739A1 WO 2021129739 A1 WO2021129739 A1 WO 2021129739A1 CN 2020139014 W CN2020139014 W CN 2020139014W WO 2021129739 A1 WO2021129739 A1 WO 2021129739A1
Authority
WO
WIPO (PCT)
Prior art keywords
pole
power battery
top cover
hole
boss
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/139014
Other languages
English (en)
French (fr)
Inventor
喻先锋
侯敏
刘婵
胡鹏
蔡云龙
余招宇
曹辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Ruipu Energy Co Ltd
Rept Battero Energy Co Ltd
Original Assignee
Ruipu Energy Co Ltd
Shanghai Ruipu Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201911346498.6A external-priority patent/CN110854308A/zh
Priority claimed from CN201922344555.9U external-priority patent/CN211455733U/zh
Priority claimed from CN202021438092.9U external-priority patent/CN211376681U/zh
Application filed by Ruipu Energy Co Ltd, Shanghai Ruipu Energy Co Ltd filed Critical Ruipu Energy Co Ltd
Priority to JP2022508893A priority Critical patent/JP7481431B2/ja
Priority to EP20904663.0A priority patent/EP4084195A4/en
Priority to US17/788,564 priority patent/US20220359937A1/en
Priority to KR1020227023214A priority patent/KR20220119635A/ko
Publication of WO2021129739A1 publication Critical patent/WO2021129739A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557—Plate-shaped terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to the field of power batteries, in particular to a power battery top cover and a power battery.
  • the power battery can provide sufficient power for the electric equipment.
  • Power batteries such as lithium-ion batteries
  • the top cover structure of the power battery includes a pole, a sealing ring, etc., involving an injection molding structure, a riveting structure, and a welding structure.
  • such a top cover structure is complicated in structure, complicated in processing technology, huge processing equipment, high material and processing costs, on the other hand, in the riveted structure, it may cause problems of poor sealing and poor insulation; in the injection molding structure , It may be due to the inconsistency of the force generated by the injection molding and the direction of the compression force of the sealing ring that causes the problem of poor sealing ring compression; in the welding structure, the force required to compress the sealing ring is indirectly transmitted to the pole through the welding ring, and then to the sealing ring , It is easy to cause poor compression of the sealing ring, resulting in poor sealing of the pole.
  • the poles of the existing top cover structure of the power battery occupy too much space inside and outside the power battery, reducing the capacity density of the power battery, and the solid pole structure also increases the weight of the power battery.
  • the technical problem to be solved by the present invention is to provide a power battery top cover with a simplified structure, low cost, low weight, and good sealing performance, and a power battery including the power battery top cover.
  • the present invention proposes a power battery top cover, which is characterized by comprising: a top cover sheet, including a pole countersunk platform and a pole hole, the pole countersunk platform is recessedly arranged on the top cover sheet In the first surface, the pole hole is located in the pole sink; the first pole includes a first pole boss, and the first pole boss passes through the pole hole;
  • the fixing member includes a first fixing member through hole, the first pole is partially disposed in the first fixing member through hole, and the first fixing member is partially disposed in the pole sinking table;
  • a second The pole includes a second pole boss, the second pole boss includes a boss hole, the first pole boss extends into the boss hole, the first pole and the first pole
  • the two poles are in electrical contact; the first sealing member is arranged in the pole sinking table and is in contact with the first pole; and the insulating plate, including the through hole of the insulating plate, is arranged on the top cover sheet On one side of the second surface, the second surface is the second surface
  • the first pole boss and the boss hole are connected by welding.
  • the first pole further includes a groove located at the waist of the first pole;
  • the first fixing member further includes a protruding portion, the protruding portion The part is located at the waist of the first fixing member, and the protruding part is embedded in the groove.
  • the first pole and the first fixing member are integrally injection molded or assembled and connected.
  • the first pole is made of conductive material, and the material of the first pole is different from the material of the first fixing member.
  • the first sealing member has an annular structure, and the annular area of the first sealing member is smaller than the hole area of the through hole of the first fixing member.
  • the first sealing member includes a first part and a second part, the first part is sandwiched between the first pole and the pole sinker, and the second Part of it is arranged in the pole hole, and the second part is sandwiched between the pole sink and the second pole boss.
  • the first part and the second part are L-shaped in their longitudinal sections.
  • it further includes: a second sealing element at least partially sandwiched between the second pole and the second surface.
  • the second sealing member has an annular structure, and the annular area of the second sealing member is smaller than the hole area of the through hole of the insulating plate.
  • the second sealing element includes a third part and a fourth part, the third part is sandwiched between the second pole and the second surface, and the first Four parts are arranged in the pole hole, and the fourth part is sandwiched between the pole sinking platform and the second pole boss.
  • the third part and the fourth part are L-shaped in their longitudinal sections.
  • the first sealing member and the second sealing member are in contact with each other.
  • the first sealing member includes a fifth part sandwiched between the pole sinking platform and the second pole boss, and the second sealing member includes a sandwiching A sixth portion between the pole sinking platform and the second pole boss, the fifth portion includes a first end parallel to the first surface, and the sixth portion includes a first end parallel to the first surface. On the second end of the first surface, the first end abuts against the second end.
  • the first sealing element and the second sealing element are integrally formed.
  • the first fixing member is made of a conductive material or an insulating material.
  • the first fixing member is made of an insulating material.
  • the top cover sheet includes two symmetrically distributed pole sinkers, each pole sinker includes one pole hole, and two sets of the first pole
  • the pole, the first fixing member, the second pole and the first sealing member are respectively arranged corresponding to the two pole sinking tables and the pole hole, wherein a set of the first pole and the pole hole
  • the second pole serves as the positive pole of the power battery, and another set of the first pole and the second pole serves as the negative pole of the power battery.
  • the inside of the second pole boss is hollow.
  • the shape of the first pole boss is one of a polygon, a circle, an ellipse or a racetrack shape
  • the shape of the boss hole is a polygon, a circle, or an ellipse.
  • the racetrack shape, the shape of the first pole boss and the boss hole are matched.
  • the present invention also provides a power battery, which is characterized by comprising the power battery top cover as described above.
  • the first pole boss of the first pole extends into the boss hole of the second pole, and the first pole and the first fixing member pass through the groove and the protrusion
  • the matching connection simplifies the structure of the pole assembly, reduces the height space occupied by the pole assembly inside and outside the power battery, and improves the utilization of the space inside and outside the power battery.
  • the power battery top cover of the present invention adopts the first sealing element and the second sealing element to form a double sealing structure for the pole assembly, which greatly improves the reliability of the pole sealing; and the first pole and the second pole are welded Way connection, the force generated in the welding process is directly transmitted to the first seal and the second seal, the welding force is consistent with the direction of the compression force of the first seal and the second seal, which helps to seal the first seal The compression of the second sealing member and the second sealing member, thereby further enhancing the sealing performance of the pole.
  • the power battery top cover has good airtightness, pressure resistance and high temperature resistance.
  • the power battery including the power battery top cover has good airtightness, pressure resistance and high temperature resistance, and is safe and reliable.
  • FIG. 1A is a schematic diagram of a three-dimensional structure of a top cover of a power battery according to an embodiment of the present invention
  • FIG. 1B is a schematic top view of a top cover of a power battery according to an embodiment of the present invention.
  • Figure 2 is an exploded schematic diagram of a power battery top cover according to an embodiment of the present invention.
  • 3A-3C are schematic cross-sectional views of a top cover of a power battery according to an embodiment of the present invention.
  • 4A-4C are schematic diagrams of the shape of the first pole 210 of the top cover of the power battery according to an embodiment of the present invention.
  • 5A-5C are schematic diagrams of the shape of the second pole 240 of the top cover of the power battery according to an embodiment of the present invention.
  • 6A-6C are schematic diagrams of the shape of the first pole 210 of the top cover of the power battery according to another embodiment of the present invention.
  • FIGS. 7A-7C are schematic diagrams of the shape of the second pole 240 of the top cover of the power battery according to another embodiment of the present invention.
  • FIGS. 8A-8C are schematic diagrams of the shape of the first pole 310 of the top cover of the power battery according to an embodiment of the present invention.
  • 9A-9C are schematic diagrams of the shape of the second pole 340 of the top cover of the power battery according to an embodiment of the present invention.
  • 10A-10C are schematic diagrams of the shape of the first pole 210 of the top cover of the power battery according to another embodiment of the present invention.
  • 11A-11C are schematic diagrams of the shape of the second pole 240 of the top cover of the power battery according to another embodiment of the present invention.
  • FIG. 12A is a perspective schematic view of a top cover of a power battery according to another embodiment of the present invention.
  • Fig. 12B is an exploded schematic diagram of the power battery top cover of the embodiment shown in Fig. 12A;
  • FIGS. 13A and 13B are structural schematic diagrams of the first pole 210 of the top cover of the power battery according to another embodiment of the present invention.
  • 14A and 14B are structural schematic diagrams of the second pole 240 of the power battery top cover according to another embodiment of the present invention.
  • FIG. 15 is a schematic structural view of an insulating plate bottom plate of a top cover of a power battery according to an embodiment of the present invention.
  • 16 is an exploded schematic diagram of a power battery top cover according to another embodiment of the present invention.
  • 17A-17C are schematic cross-sectional views of a top cover of a power battery according to an embodiment of the present invention.
  • 18A-18D are four implementation modes of the first sealing member and the second sealing member of the power battery top cover of the present invention.
  • Fig. 19 is a schematic structural diagram of a power battery according to an embodiment of the present invention.
  • spatial relation words such as “below”, “below”, “below”, “below”, “above”, “above”, etc. may be used herein to describe an element shown in the drawings. Or the relationship between the feature and other elements or features. It will be understood that these spatial relationship terms are intended to encompass directions other than those depicted in the drawings of the device in use or operation. For example, if the device in the drawings is turned over, the orientation of elements described as “below” or “beneath” or “beneath” other elements or features will be changed to be “above” the other elements or features. Thus, the exemplary terms “below” and “below” can encompass both directions of up and down.
  • the device may also have other orientations (rotated by 90 degrees or in other directions), so the spatial relationship descriptors used here should be explained accordingly.
  • a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.
  • the described structure where the first feature is "on" the second feature may include an embodiment in which the first and second features are formed in direct contact, or may include other features formed on the first and second features.
  • the embodiment between the second feature, so that the first and second features may not be in direct contact.
  • a component when a component is referred to as being “on another component”, “connected to another component”, “coupled to another component” or “contacting another component”, it can be directly on the other component. On, connected to or coupled to, or in contact with the other component, or an intervening component may be present. In contrast, when a component is referred to as being “directly on,” “directly connected to,” “directly coupled to,” or “directly in contact with” another component, there is no intervening component. Likewise, when the first component is referred to as “electrical contact” or “electrically coupled to” the second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path may include capacitors, coupled inductors, and/or other components that allow current to flow, even without direct contact between conductive components.
  • the present invention provides a power battery top cover, including: a top cover sheet, including a pole sinking platform and a pole hole, the pole sinking platform is recessedly arranged in a first surface of the top cover sheet, and the pole hole is located on the pole In the sinking platform;
  • the first pole includes a first pole boss, the first pole boss passes through the pole hole;
  • the first fixing member includes a through hole of the first fixing member, the first pole is partially disposed in the first In a through hole of the fixing member, the first fixing member is partially arranged in the pole sink;
  • the second pole includes a second pole boss, the second pole boss includes a boss hole, and the first pole boss Extending into the boss hole, the first pole is in electrical contact with the second pole;
  • the first sealing member is arranged in the pole sinking table and is in contact with the first pole; and
  • the insulating plate including the through hole of the insulating plate, It is arranged on the side of the second surface of the top cover sheet, the second surface is the opposite
  • the first pole, the first fixing member, the second pole and the first sealing member can form a pole assembly of a power battery, which is used to form an electrode of the power battery.
  • the invention does not limit the number of electrodes of the power battery. It can be understood that the number of pole components corresponds to the number of electrodes of the power battery.
  • a power battery includes two electrodes, a positive electrode and a negative electrode.
  • the pole assembly in the embodiment of the present invention can be used as a positive electrode or a negative electrode of a power battery.
  • the drawings in this specification will take a power battery top cover for a power battery with two electrodes as an example for description. In this embodiment, the power battery top cover includes two sets of pole assemblies arranged symmetrically.
  • FIG. 1A is a schematic diagram of a three-dimensional structure of a top cover of a power battery according to an embodiment of the present invention.
  • Fig. 1B is a schematic top view of a top cover of a power battery according to an embodiment of the present invention.
  • the power battery top cover 100 includes a top cover sheet 110, two pole assemblies 200, 300, and an insulating plate 400.
  • Each pole assembly includes a set of first poles and a first fixing plate.
  • the specific structure of the pole assembly 200, 300 will be developed in conjunction with other figures in the following paragraphs, the second pole and the first sealing component (not shown).
  • the top cover sheet 110 of the power battery top cover 100 is a rectangular plate-shaped structure. In actual use, it is placed in the direction pointed by the direction D, and the first surface S1 of the top cover sheet 110 is located on or Called the front side, the second surface S2 of the top cover sheet 120 is located below or called the bottom surface, and the second surface S2 is the reverse side of the first surface S1.
  • the insulating plate 400 is located on the side of the second surface S2 of the top cover sheet 110.
  • the insulating plate 400 has a plate-like structure adapted to the shape and size of the top cover sheet 110.
  • the top cover sheet 110 further includes an explosion-proof mounting hole 140 for installing explosion-proof components; the top cover sheet 110 also includes a liquid injection hole 150 through which the liquid injection hole 150 can inject liquid into the battery, and the liquid injection hole 150 can be sealed after the liquid injection is completed.
  • 1A and 1B are not used to limit the specific size and shape of the top cover sheet 110 of the power battery top cover 100 of the present invention.
  • the size and shape of the pole assemblies 200, 300, the explosion-proof mounting hole 140 and the injection hole 150 are in the top cover.
  • Fig. 2 is an exploded schematic diagram of a top cover of a power battery according to an embodiment of the present invention.
  • 2 is an exploded view of the power battery top cover 100 corresponding to the embodiment shown in FIGS. 1A and 1B, which shows the components of the pole assembly 200, 300, the specific components in the top cover sheet 110, and the insulating plate 400 The specific components.
  • the top cover sheet 110 in the power battery top cover 100 includes pole sinkers 120 and 130 and pole holes 121 and 131.
  • the pole hole 121 is located in the pole sinker 120, and the pole hole 131 Located in the pole sink 130.
  • the pole sinkers 120, 130 are recessedly arranged in the first surface S1 of the top cover sheet 110, that is to say, the pole sinkers 120, 130 are located in the top cover sheet 110 in a sinking manner relative to the first surface S1.
  • the pole sinkers 120, 130 and the first surface S1 form a step shape with a certain height, and the height of the step is the settling height of the pole sinkers 120, 130 sinking into the top cover sheet 110.
  • the pole sinkers 120 and 130 are used to install the pole components 200 and 300.
  • the pole sinkers 120 and 130 can also be called mounting grooves.
  • the pole holes 121 and 131 are arranged at the bottom of the mounting groove. 121, 131 may also be referred to as mounting through holes.
  • the first pole 210, the first fixing member 220, the second pole 240 and the first sealing member 230 constitute the pole assembly 200 described above
  • the second pole 340 and the first sealing member 330 constitute the pole assembly 300 described above.
  • the pole assemblies 200 and 300 are used to electrically connect the power battery to an external device.
  • the first surface S1 of the top cover sheet 110 may further include electrode indicator marks 101 and 102, where the electrode indicator mark 101 is "+", indicating the pole assembly 200 nearby.
  • the electrode indicator 102 is "-", indicating that the pole assembly 300 nearby is connected to the negative ear of the battery cell of the power battery.
  • the second pole 240 is connected to the positive lug of the battery cell through an adapter piece, and the second pole 340 is connected to the negative electrode lug of the battery cell through another adapter piece, thereby realizing the electrical properties of the cell and the external device. connection.
  • the pole sinking table 120 and the pole hole 121 cooperate with the pole assembly 200 to form one electrode of the power battery, and the pole sinking table 130 and the pole hole 131 cooperate with the pole assembly 300 to form another electrode of the power battery.
  • One electrode the pole sinking table 120 and the pole hole 121 cooperate with the pole assembly 200 to form one electrode of the power battery, and the pole sinking table 130 and the pole hole 131 cooperate with the pole assembly 300 to form another electrode of the power battery.
  • One electrode is shown in FIG. 2, the pole sinking table 120 and the pole hole 121 cooperate with the pole assembly 200 to form one electrode of the power battery, and the pole sinking table 130 and the pole hole 131 cooperate with the pole assembly 300 to form another electrode of the power battery.
  • One electrode the pole sinking table 120 and the pole hole 121 cooperate with the pole assembly 200 to form one electrode of the power battery
  • the pole sinking table 130 and the pole hole 131 cooperate with the pole assembly 300 to form another electrode of the power battery.
  • the shape and size of the pole sinker 120 and the pole sinker 130 are the same, and they are symmetrically arranged in the top cover piece 110.
  • the shape and size of the pole sinker 120 and the pole sinker 130 are different.
  • the pole sinker 120 and the pole sinker 130 are asymmetrically disposed in the top cover piece 110.
  • the shape and size of the pole hole 121 and the pole hole 131 are the same, and the relative positions of the pole hole 121 and the pole hole 131 in the pole sinker 120 and the pole sinker 130 are also the same.
  • the shape and size of the pole hole 121 and the pole hole 131 are different.
  • the relative positions of the pole hole 121 and the pole hole 131 in the pole sinker 120 and the pole sinker 130 are different.
  • the size, shape and position of the pole sinking table and pole hole should correspond to the size and shape of the corresponding pole component.
  • pole sinking table 120 the pole hole 121 and the pole assembly 200 as examples for description, and the differences between the pole assemblies 200 and 300 will be specifically pointed out.
  • the first pole 210 includes a first pole boss (not shown), and the first pole boss passes through the pole hole 121 on the top cover sheet 110. In the viewing angle shown in FIG. 2, the first pole boss is protrudingly provided on the lower surface of the first pole 210.
  • the first fixing member 220 includes a first fixing member through hole 221, the first pole 210 is partially disposed in the first fixing member through hole 221, and the first fixing member 220 is partially disposed in the pole sinker 120.
  • the second pole 240 includes a second pole boss 241, and the second pole boss 241 includes a boss hole 242.
  • the first pole boss extends into the boss In the mesa hole 242, the first pole 210 and the second pole 240 are in electrical contact.
  • the shape of the first pole boss and the boss hole 242 are matched or the same.
  • the first sealing member 230 is disposed in the pole sinker 120 and is in contact with the first pole 210.
  • the insulating plate 400 includes insulating plate through holes 420 and 430, wherein the insulating plate through hole 420 corresponds to the pole assembly 200, and the insulating plate through hole 430 corresponds to the pole assembly 300.
  • the position, size and shape of the insulating plate through hole 420 on the insulating plate 400 should be adapted to the pole hole 121, the first pole boss, and the second pole boss 241 , So that the second pole boss 241 passes through the insulating plate through hole 420 and is electrically connected to the first pole 210.
  • the insulating plate 400 is provided on the side of the second surface S2 of the top cover sheet 110.
  • the insulating plate 400 further includes an explosion-proof valve hole 440 and a liquid injection hole 450.
  • the shape, size and position of the explosion-proof valve hole 440 correspond to the explosion-proof mounting hole 140 on the top cover sheet 110.
  • the power battery top cover 100 further includes a protective patch 141 and an explosion-proof sheet 142.
  • the explosion-proof mounting hole 140, the protective patch 141, the explosion-proof disc 142 and the explosion-proof valve hole 440 together constitute an explosion-proof valve assembly.
  • the explosion-proof disc 142 and the explosion-proof mounting hole 140 are assembled and sealed by welding.
  • the protective patch 141 is attached to the top cover sheet 110 to realize the sealing of the explosion-proof component.
  • the explosion-proof valve hole 440 covers the explosion-proof disk 142 from the direction toward the second surface S2, thereby protecting the explosion-proof valve assembly.
  • the material of the protective patch 141 is PET or other plastic materials
  • the material of the explosion-proof sheet 142 is aluminum or aluminum alloy.
  • the shape, size and position of the liquid injection hole 450 correspond to the liquid injection hole 150 on the top cover sheet 110.
  • the shape and size of the liquid injection hole 450 can be different from the liquid injection hole 150, as long as the liquid can be injected into the battery through the liquid injection hole 150 and the liquid injection hole 450.
  • the liquid injection hole 450 is a supporting through-hole structure, which facilitates rapid infiltration of the electrolyte inside the battery after the electrolyte is injected.
  • the insulating plate 400 is made of PP or other plastic materials with good corrosion resistance and high temperature resistance.
  • the insulating plate 400 may be integrally formed with a plastic material and disposed under the top cover sheet 110. Therefore, the insulating plate 400 may also be referred to as an integrated plastic.
  • 3A-3C are schematic cross-sectional views of a top cover of a power battery according to an embodiment of the present invention.
  • 3A-3C are cross-sectional views taken along the line AA′ shown in FIG. 2.
  • 3A is a schematic cross-sectional view of the power battery top cover 100 shown in FIGS. 1-3, which includes the top cover sheet 110, the pole assemblies 200, 300, and the insulating plate 400.
  • the pole assembly 200 includes a first pole 210, a first fixing member 220, a second pole 240, and a first sealing member 230
  • the pole assembly 300 includes a first pole 310, a first fixing member 320, The second pole 340 and the first sealing member 330.
  • the explosion-proof valve components such as the protective patch 141 and the explosion-proof disk 142 are arranged in the middle part of the top cover piece 110, and the pole assemblies 200 and 300 are respectively arranged symmetrically at both ends of the top cover piece 110.
  • FIG. 3B is a partial enlarged schematic diagram of a part of the structure including the pole assembly 200.
  • the first pole 210 includes a first pole boss 211.
  • the part of the first pole 210 excluding the first pole boss 211 is called a pole body 212.
  • the pole body 212 is partially disposed in the first fixing member through hole 221, and a part of the pole body 212 protrudes out of the first fixing member through hole 221 along the direction D.
  • the first pole boss 211 passes through the pole hole 121 and extends into the boss hole 242.
  • the first pole 210 and the second pole 240 are electrically contacted through the first pole boss 211 and the boss hole 242.
  • the lower surface of the pole body 212 of the first pole 210 is also in contact with the upper surface of the second pole boss 241 of the second pole 220, the first pole 210 and the second pole
  • the bottom surface of the pole body 212 and the top surface of the second pole boss 241 are also in electrical contact.
  • the first sealing member 230 is disposed in the pole sinker 120 and is in contact with the lower surface of the pole body 212 of the first pole 210.
  • the first sealing member 230 includes a first part 231 and a second part 232.
  • the first part 231 is sandwiched between the first pole 210 and the pole sink 120, and the second part 232 is provided in the pole hole.
  • the second part 232 is sandwiched between the pole sinking platform 120 and the second pole boss 241. As shown in FIG.
  • the upper surface of the first portion 231 is in contact with the lower surface of the pole body 212, the lower surface of the first portion 231 is in contact with the upper surface of the pole sinker 120; the upper surface of the second portion 232 is also in contact with The lower surface of the pole body 212 is in contact, the outer side of the second portion 232 is in contact with the side wall of the pole sinking table 120 extending downward to the second surface S2, and the inner side of the second portion 232 is convex with the second pole.
  • the stage 242 is fully in contact, partly in contact, or not in contact.
  • the first part 231 and the second part 232 are L-shaped in their longitudinal section. As shown in FIG. 3B, the first part 231 and the second part 232 are in an inverted L shape in their longitudinal section. As the two sides of the L shape, the first part 231 and the second part 232 may be perpendicular to each other, or may form a certain angle.
  • the pole sinker 120 is square, the outer shape of the first fixing member 220 is approximately square, the pole hole 121, the first fixing member through hole 221, and the second pole boss 241 Both the boss hole and the boss hole 242 are circular, and the first sealing member 230 is annular.
  • the first seal 230 may be implemented as a sealing ring. Assuming that the side length of the pole sinker 120 is D1, the diameter of the through hole 221 of the first fixing member is D2, the diameter of the outer ring of the first sealing member 230 is D3, the diameter of the inner ring of the first sealing member 230 is D4, and the boss The diameter of the hole 242 is D5, then D1>D2>D3>D4>D5.
  • the first fixing member 220 is partially embedded in the pole sinker 120, and the outer sidewall of the first fixing member 220 contacts the sidewall of the pole sinker 120 extending upward to the first surface S1.
  • the upper part of the first fixing member 220 protrudes from the pole sinker 120 and protrudes from the first surface S1.
  • the first sealing member 230 has an annular structure, and the annular area of the first sealing member 230 is smaller than the hole area of the through hole 221 of the first fixing member. As shown in FIG. 3B, the diameter D3 of the outer ring of the first sealing member 230 is smaller than the diameter D2 of the through hole 221 of the first fixing member.
  • the pole assembly 200 is used as the positive electrode of the power battery, and the first fixing member 220 is made of a conductive material or an insulating material.
  • the first fixing member 220 is a conductive material, it may be conductive plastic with a resistance value of 0 ⁇ 10000 ohms, and the first fixing member 220 and the top cover sheet 110 are in a conductive state.
  • the first fixing member 220 is an insulating material, it may be an insulating plastic with a resistance value greater than 200 megaohms, and the first fixing member 220 and the top cover sheet 110 are insulated.
  • the first fixing member 220 is made of plastic material, since it is located above the top cover sheet 110, it can be referred to as upper plastic.
  • the material of the top cover sheet 110 is aluminum or aluminum alloy.
  • the first pole boss 211 and the boss hole 242 are connected by welding, such as laser welding.
  • the first sealing member 230 is first placed in the pole sinking table 120, and then the first fixing member 220 is installed on the pole of the top cover piece 110
  • the sinking table 120 extends upwards into the side wall of the first surface S1
  • the first pole 210 is placed in the pole sinking table 120 and the first fixing member through hole 221, and is connected to the first fixing member 220 and the first sealing member 230. Achieve close contact.
  • the second pole 240 is passed through the insulating plate through hole 420 and the pole hole 121 on the insulating plate 400, so that the first pole boss 211 and the boss hole 242 are in close contact.
  • laser welding is used to weld the contact surfaces of the first pole boss 211 and the boss hole 242 together along the gap, or the bottom surface of the pole body 212 of the first pole 210 and the bottom surface of the second pole 240 are welded together.
  • One or more welds are added between the contact surfaces of the upper surface of the second pole boss 241 to realize the fixation and sealing of the pole assembly 200.
  • the material of the first pole 210 and the second pole 240 may be aluminum or aluminum alloy.
  • the material of the first fixing member 220 may be a plastic material with good corrosion resistance and high temperature resistance.
  • the material of the first sealing member 230 may be a rubber material with certain elasticity.
  • a top groove 213 is further included on the top of the first pole 210.
  • the top groove 213 and the first pole boss 211 are similar in shape, both are circular, and the recess depth of the groove 213 is substantially equal to the protrusion height of the first pole boss 211.
  • a riveting hole 213a is provided in the top groove 213 for riveting.
  • the shape of the top groove 213 and the first pole boss 211 can be polygonal, circular, elliptical, racetrack-shaped, or shapes such as rounded corners or keyway deformation are added to these shapes. .
  • the shape of the first pole 210 may be a polygon, a circle, an ellipse, or a racetrack shape, or shapes such as rounded corners or deformation of the keyway may be added to these shapes.
  • FIG. 3C is a partial enlarged schematic diagram of a part of the structure including the pole assembly 300. Most of the structure of the pole assembly 300 is the same as that of the pole assembly 200, and the same parts will not be repeated. Hereinafter, the difference between the pole assembly 300 and the pole assembly 200 will be described with reference to FIG. 3C.
  • the first fixing member 320, the second pole 340 and the first sealing member 330 are the same as the first fixing member 220, the second pole 240 and the first sealing member 230, respectively.
  • the first pole 310 includes a first pole boss 311.
  • the part of the first pole 310 excluding the first pole boss 311 is called a pole body 312.
  • the pole body 312 is divided into two parts along the direction D, an upper part 312a and a lower part 312b, and the two parts have bosses respectively. Therefore, the first post boss 311 It is also divided into two parts, namely the upper boss 311a and the lower boss 311b.
  • the upper part 312a and the lower part 312b may be integrally formed, or may be a combination of two separate parts. Wherein, the lower boss 311b extends into the boss hole 342 of the second pole 340.
  • the material of the first pole 310 may be a copper-aluminum composite material, wherein the material of the upper part 312a may be aluminum or aluminum alloy, and the material of the lower part 312b
  • the material of may be copper or copper alloy; the material of the second pole 340 may be copper or copper alloy.
  • the material of the first fixing member 320 may be a plastic material with good corrosion resistance and high temperature resistance.
  • the material of the first sealing member 330 may be a rubber material with certain elasticity.
  • a top groove 313 is further included on the top of the first pole 310.
  • the shape of the top groove 313 and the first pole boss 311 are similar, both are circular, and the recess depth of the groove 313 is substantially equal to the protrusion height of the first pole boss 311.
  • the shape of the top groove 313 and the first pole boss 311 can be polygonal, circular, elliptical, racetrack-shaped, or shapes such as rounded corners or keyway deformation are added to these shapes. .
  • the boss hole 342 in the second pole 340 has the same shape as the first pole boss 311.
  • the shape of the first pole 310 may be a polygon, a circle, an ellipse, or a racetrack shape, or shapes such as rounded corners or deformation of the keyway may be added to these shapes.
  • the appearance and shape of the first pole 210 and the first pole 310 may be the same or different.
  • the different advantage is that it can realize error-proofing and avoid the reverse installation of the positive and negative poles during the process, which will cause the battery to corrode.
  • the appearance and shape of the second pole 240 and the second pole 340 may be the same or different.
  • the first pole boss of the first pole is extended into the boss hole of the second pole, which reduces the height space occupied by the pole assembly inside and outside the power battery and improves This improves the utilization of the internal and external space of the power battery.
  • FIGS. 4A-4C are schematic diagrams of the shape of the first pole 210 of the top cover of the power battery according to an embodiment of the present invention.
  • 4A is a bottom view
  • the shape of the first pole 210 is a rectangle with rounded corners, and has a cut corner 214 at the upper right corner
  • the circular first pole boss 211 is located at the center of the first pole 210 .
  • the cut corner 214 can facilitate the orientation during installation.
  • FIG. 4B is a side cross-sectional view, the same viewing angle as Figs. 3A-3B. It can be seen from FIG. 4B that the top groove 213 and the first pole boss 211 are disposed on two opposite surfaces of the first pole 210 opposite to each other.
  • 4C is a top view. It can be seen that the top groove 213 is located at the center of the first pole 210, and the cut corner 214 is located at the lower right corner of the figure.
  • 5A-5C are schematic diagrams of the shape of the second pole 240 of the top cover of the power battery according to an embodiment of the present invention.
  • 5A is a bottom view
  • the shape of the second pole 240 is a square with rounded corners
  • the circular boss hole 242 is located at the center of the second pole 240.
  • FIG. 5B is a side cross-sectional view. It can be seen that the second pole boss 241 protrudes from the surface of the second pole 240, and the boss hole 242 is located at the center of the second pole boss 241.
  • FIG. 5C is a top view. It can be seen that the second pole boss 241 is located at the center of the second pole 240, and the boss hole 242 is located at the center of the second pole boss 241.
  • the inner portion 241a of the second pole boss 241 is hollow. As shown in FIG. 5B, the thickness T of the top of the second pole boss 241 is 0.1-5 mm.
  • FIGS. 6A-6C are schematic diagrams of the shape of the first pole 210 of the top cover of the power battery according to another embodiment of the present invention. Among them, FIG. 6A is a bottom view, FIG. 6B is a side cross-sectional view, and FIG. 6C is a top view.
  • the difference between the first pole 210 in this embodiment and the first pole 210 shown in FIGS. 4A-4C is that the shape of the first pole boss 211 and the top groove 213 are different.
  • the first pole boss 211 and the top groove 213 in this embodiment are both roughly elliptical, and in the viewing angle shown in FIGS. 6A and 6C, they have upward and downward protrusions. Keyway.
  • FIGS. 7A-7C are schematic diagrams of the shape of the second pole 240 of the top cover of the power battery according to another embodiment of the present invention.
  • FIG. 7A is a bottom view
  • FIG. 7B is a side cross-sectional view
  • FIG. 7C is a top view.
  • the second pole 240 in this embodiment is different from the second pole 240 shown in FIGS. 5A-5C in that the shape of the boss hole 242 is different, and the contour of the second pole 240 also includes a cut corner 243 .
  • the boss hole 242 in this embodiment is roughly elliptical, and in the viewing angle shown in FIGS. 6A and 6C, it has key grooves protruding upward and downward, as shown in FIGS. 6A-6C.
  • the shapes of the first pole boss 211 and the top groove 213 shown are similar.
  • FIGS. 8A-8C are schematic diagrams of the shape of the first pole 310 of the top cover of the power battery according to an embodiment of the present invention.
  • the first pole 310 is included in the pole assembly 300, and the pole assembly 300 can be used as a negative electrode of a power battery.
  • 8A is a bottom view
  • the shape of the first pole 310 is a rectangle with rounded corners, and has a cut corner 314 at the upper left corner
  • the circular first pole boss 811 is located at the center of the first pole 810 .
  • the cut corner 314 can facilitate the direction determination during installation.
  • Fig. 8B is a side cross-sectional view, which is the same as the viewing angle of Figs. 3A-3B. It can be seen from FIG.
  • FIG. 8B is a top view. It can be seen that the top groove 313 is located at the center of the first pole 310, and the cut corner 314 is located at the lower left corner of the figure.
  • 9A-9C are schematic diagrams of the shape of the second pole 340 of the top cover of the power battery according to an embodiment of the present invention.
  • 9A is a bottom view.
  • the shape of the second pole 340 is a square with rounded corners and has a cut corner 343 at the lower right corner.
  • the circular boss hole 342 is located at the center of the second pole 340.
  • 9B is a side cross-sectional view. It can be seen that the second pole boss 341 protrudes from the surface of the second pole 340, and the boss hole 342 is located at the center of the second pole boss 341.
  • 9C is a top view. It can be seen that the second pole boss 341 is located at the center of the second pole 340, the boss hole 342 is located at the center of the second pole boss 341, and the cut corner 343 is located at the upper right corner in the figure.
  • the inner portion 341a of the second pole boss 341 is hollow. As shown in FIG. 9B, the thickness T of the top of the second pole boss 341 is 0.1-5 mm.
  • the inner 241a, 341a of the second pole boss 241, 341 adopts a hollow design, which can reduce the weight of the power battery top cover.
  • FIGS. 10A-10C are schematic diagrams of the shape of the first pole 210 of the top cover of the power battery according to another embodiment of the present invention.
  • 10A is a bottom view
  • FIG. 10B is a side cross-sectional view
  • FIG. 10C is a top view.
  • the difference between the first pole 210 in this embodiment and the first pole 210 shown in FIGS. 8A-8C is that the shape of the first pole boss 211 and the top groove 213 are different, and the cut corner 314 is shown in FIG. 8A is located in the lower left corner.
  • the first pole boss 211 and the top groove 213 in this embodiment are both roughly elliptical, and in the viewing angle shown in FIGS. 10A and 10C, they have upward and downward protrusions. Keyway.
  • FIGS. 9A-9C are schematic diagrams of the shape of the second pole 240 of the top cover of the power battery according to another embodiment of the present invention.
  • FIG. 11A is a bottom view
  • FIG. 11B is a side cross-sectional view
  • FIG. 11C is a top view.
  • the difference between the second pole 240 in this embodiment and the second pole 240 shown in FIGS. 9A-9C is that the shape of the boss hole 242 is different, and the cut corner 343 is located at the upper left corner in FIG. 11A.
  • the boss hole 242 in this embodiment is roughly elliptical, and in the viewing angle shown in Figures 11A and 11C, it has key grooves protruding upward and downward, as shown in Figures 10A-10C.
  • the shapes of the first pole boss 211 and the top groove 213 shown are similar.
  • Fig. 12A is a perspective schematic view of a top cover of a power battery according to another embodiment of the present invention.
  • Fig. 12B is an exploded schematic diagram of the power battery top cover of the embodiment shown in Fig. 12A.
  • the outer shapes of the first electrodes 210 and 310 are circular
  • the outer shapes of the first fixing members 220 and 320 are circular
  • the outer shapes of the pole sinkers 120 and 130 are also circular.
  • the first sealing members 230 and 330 and the first fixing members 220 and 320 are both annular. It should be noted that although the first sealing members 230 and 330 are located above the first fixing members 220 and 320 in FIG.
  • the outer ring diameters of the first sealing members 230 and 330 are smaller than the outer ring diameters of the first fixing members 220 and 320. Therefore, after assembly, the first sealing members 230 and 330 are respectively located in the first fixing member through holes 221 and 321 in the first fixing members 220 and 230.
  • FIG. 13A and 13B are structural schematic diagrams of the first pole 210 of the top cover of the power battery according to another embodiment of the present invention. Among them, FIG. 13A is a bottom view, and FIG. 13B is a side view. In this embodiment, the first pole boss 211 of the first pole 210 has a racetrack shape.
  • FIGS. 13A and 13B are structural schematic diagrams of the second pole 240 of the power battery top cover according to another embodiment of the present invention.
  • Fig. 14A is a bottom view
  • Fig. 14B is a side view.
  • the boss hole 242 in the second pole 240 has a racetrack shape, which can cooperate with the first pole boss 211 in the embodiment shown in FIGS. 13A and 13B.
  • the first technology boss 211 and boss hole 242 that cooperate with each other are racetrack-shaped, which can increase the welding trajectory of the first pole 210 and the second pole 240 , Thereby improving the force strength and flow capacity of the pole assemblies 200 and 300.
  • FIG. 15 is a schematic diagram of the structure of the insulating plate bottom plate of the top cover of the power battery according to an embodiment of the present invention.
  • the insulating plate bottom plate 460 is located at the bottom of the insulating plate 440.
  • the insulating plate bottom plate 460 includes an explosion-proof valve hole 440 and a liquid injection hole 451.
  • the explosion-proof valve hole 440 includes a porous structure.
  • the insulating plate bottom plate 460 also includes insulating plate through holes 421 and 431. In the embodiment shown in FIG.
  • the insulating plate through holes 421, 431 and the liquid injection hole 451 on the insulating plate bottom plate 460 shown in FIG. 15 correspond to the insulating plate through holes 420, 430 and the liquid injection hole 450, respectively.
  • Fig. 16 is an exploded schematic diagram of a power battery top cover according to another embodiment of the present invention.
  • the power battery top cover 1600 of this embodiment includes a top cover sheet 510, an insulating plate 800, and a first pole 610, a first fixing member 620, a second pole 640, a first sealing member 630 and The pole assembly 600 composed of the second sealing member 650 and the pole assembly 700 composed of the first pole 710, the first fixing member 720, the second pole 740, the first sealing member 730 and the second sealing member 750.
  • the top cover piece 510 includes pole sinkers 520, 530 and pole holes 521, 531.
  • the pole sinkers 520, 530 are recessed in the first surface S1 of the top cover piece 510, and the pole The holes 521 and 531 are located in the pole sinkers 520 and 530.
  • the first pole 610 includes a first pole boss (not shown), and the first pole boss passes through the top cover sheet 510 ⁇ pole hole 521. In the viewing angle shown in FIG. 16, the first pole boss is protrudingly provided on the lower surface of the first pole 610.
  • the first fixing member 620 includes a first fixing member through hole 621, the first pole 610 is partially disposed in the first fixing member through hole 621, and the first fixing member 620 is partially disposed in the pole countersunk 520.
  • the second pole 640 includes a second pole boss 641, and the second pole boss 641 includes a boss hole 642.
  • the first pole boss extends into the boss In the mesa hole 642, the first pole 610 and the second pole 640 are in electrical contact.
  • the first sealing member 630 is disposed in the pole sink 520 and is in contact with the first pole 610.
  • the insulating plate 800 includes insulating plate through holes 820 and 830, wherein the insulating plate through hole 820 corresponds to the pole assembly 600, and the insulating plate through hole 830 corresponds to the pole assembly 700.
  • the position, size and shape of the insulating plate through hole 820 on the insulating plate 800 should be compatible with the pole hole 621, the first pole boss, and the second pole boss 641 , So that the second pole boss 641 passes through the insulating plate through hole 820 and is electrically connected to the first pole 610.
  • the insulating plate 800 is provided on the side of the second surface S2 of the top cover sheet 510.
  • FIG. 16 Most of the structure in the embodiment of FIG. 16 is the same as that of the embodiment shown in FIG. 2, and the same content will not be repeated.
  • Figures 2 to 15 and the corresponding description content can all be used to illustrate the embodiment shown in Figure 16.
  • the first pole 610 of this embodiment further includes a groove 611, which is located at the waist of the first pole 610; the first fixing member 620 also includes a protrusion 622, which is located at The protruding part 622 of the waist of the first fixing member 620 is embedded in the groove 611.
  • the first pole 610 and the first fixing member 620 are integrally injection molded or assembled and connected. According to these embodiments, when assembling the power battery top cover 1600, the first pole 610 and the first fixing member 620 are first fixed by integral injection molding or assembling connection, and then the first pole 610 is fixed together. And the first fixing member 620 are placed in the pole sinker 520.
  • the first pole 610 and the first fixing member 620 have simple structures, save space, and have good sealing properties.
  • the first pole 610 is made of a conductive material, and the material of the first pole 610 and the material of the first fixing member 620 are different.
  • the material of the first fixing member 620 may be a conductive material or an insulating material.
  • the first fixing member 620 shown is made of a conductive material, its material is different from the material of the first pole 610.
  • the power battery top cover 1600 further includes a second sealing member 650, which is at least partially sandwiched between the second pole 640 and the second surface S2.
  • FIG. 17A-17C are schematic cross-sectional views of a top cover of a power battery according to an embodiment of the present invention.
  • the viewing angles of Figs. 17A-17C are the same as those of Figs. 3A-3C.
  • FIG. 17A is a schematic cross-sectional view of the top cover 1600 of the power battery, which includes the top cover sheet 510, the electrode groups 600 and 700, and the insulating plate 800.
  • the pole assembly 600 includes a first pole 610, a first fixing member 620, a second pole 640, a first seal 630, and a second seal 650;
  • the pole assembly 700 includes a first pole 710, The first fixing part 720, the second pole 740, the first sealing part 730 and the second sealing part 750.
  • FIG. 17B is a partial enlarged schematic diagram of FIG. 17A including the pole assembly 600.
  • the first pole 610 has a certain height along the direction D, and the groove 611 is located at the waist of the first pole 610, that is, the groove 611 is located in the middle of the height direction of the first pole 610. Location.
  • the protruding portion 622 of the first fixing member 620 is also located at the waist of the first fixing member 620, and the position, size and shape of the protruding portion 622 are all adapted to the groove 611, so that the protruding portion 622 can be embedded in the concave portion.
  • the first pole 610 and the first fixing member 620 form a structure in close contact.
  • the first pole boss 612 of the first pole post 610 extends into the boss hole 642 of the second pole boss 641.
  • the position, size, and structure of the first sealing member 630 are similar to those of the first sealing member 230 in the embodiment shown in FIG. 3B.
  • the second sealing member 650 is at least partially sandwiched between the second pole 640 and the second surface S2.
  • the material of the first pole 610 and the second pole 640 may be aluminum or aluminum alloy.
  • FIG. 17C is a partial enlarged schematic diagram of the pole assembly 700 in FIG. 17A.
  • the waist of the first pole 710 has a groove 711
  • the waist of the first fixing member 720 has a protruding portion 722. Similar to the pole assembly 600, the protruding portion 722 is embedded in the groove 711 to make The first pole 710 and the first fixing member 720 form a close contact structure.
  • the second seal 750 in the pole assembly 700 shown in FIG. 17C is similar to the second seal 650 in the pole assembly 600.
  • the difference between the pole assembly 700 and the pole assembly 600 is that the pole body 712 of the first pole 710 is divided into two parts along the direction D, an upper part 712a and a lower part 712b, and the two parts have bosses respectively. Therefore, the first pole boss 713 is also divided into two parts, namely the upper boss 713a and the lower boss 713b.
  • the upper part 712a and the lower part 712b may be integrally formed, or may be a combination of two separate parts. Wherein, the lower boss 713b extends into the boss hole 742 in the second pole boss 741 of the second pole 740.
  • the material of the first pole 710 may be a copper-aluminum composite material, wherein the material of the upper part 712a may be aluminum or aluminum alloy, and the material of the lower part 712b
  • the material of may be copper or copper alloy; the material of the second pole 740 may be copper or copper alloy.
  • the material of the first fixing member 720 may be a plastic material with good corrosion resistance and high temperature resistance.
  • the material of the first sealing member 730 may be a rubber material with certain elasticity.
  • the power battery top cover 1600 of the present invention is matched with each other through the groove of the first pole and the protruding part of the first fixing member, and the first pole and the first fixing member can be connected by injection molding.
  • the structure is simple and stable. Better tightness.
  • 18A-18D are four embodiments of the first sealing member and the second sealing member of the power battery top cover of the present invention.
  • 18A-18D can be used as partial enlarged schematic diagrams of the structure including the first sealing member 630 and the second sealing member 650 in FIG. 17B, wherein other elements except the first sealing member 630 and the second sealing member 650 are omitted.
  • 18A-18D can also be used as partial enlarged schematic diagrams of the structure including the first sealing member 730 and the second sealing member 750 in FIG. 17C.
  • the first sealing member 630 and the second sealing member 650 are taken as an example for description, which is also applicable to the description of the first sealing member 730 and the second sealing member 750.
  • the first sealing member 630 includes a first portion 630a and a second portion 630b. As shown in FIG. 17B, the first portion 630a is sandwiched between the first pole 610 and the pole sink 620. , The second part 630b is disposed in the pole hole 621, and the second part 630b is sandwiched between the pole sinking platform 620 and the second pole boss 641. As shown in FIG. 17B, the first portion 630a is sandwiched between the first pole 610 and the pole sink 620. , The second part 630b is disposed in the pole hole 621, and the second part 630b is sandwiched between the pole sinking platform 620 and the second pole boss 641. As shown in FIG.
  • the upper surface of the first portion 630a is in contact with the lower surface of the pole body 613, the lower surface of the first portion 630a is in contact with the upper surface of the pole countersunk 720; the upper surface of the second portion 630b is also in contact with The bottom surface of the pole body 613 is in contact, the outer side of the second portion 630b is in contact with the sidewall of the pole sinking table 620 extending downward to the second surface S2, and the inner side of the second portion 630b is convex with the second pole.
  • the stage 642 is fully in contact, partially in contact, or not in contact.
  • the first portion 630a and the second portion 630b are L-shaped in their longitudinal cross-sections.
  • the inverted L-shape shown in FIG. 18A indicates that the first sealing member 630 is a ring with ribs.
  • the first part 630a of the shaped structure is a ring-shaped structure, and the second part 630b is a ring-shaped rib.
  • the longitudinal section of the second sealing member 650 is in-line, indicating that it is annular. 17B, the second sealing member 650 is sandwiched between the second pole 640 and the second surface S2, the upper surface of the second sealing member 650 in the direction D is in contact with the second surface S2, and the second sealing member 650 The lower surface of the second sealing member 650 is in contact with the upper surface of the second pole 640, and the inner sidewall of the second sealing member 650 is in contact with the outer sidewall of the second pole boss 641 or not.
  • the longitudinal section of the first sealing member 630 is an inverted L shape, and the length of the second portion 630b along the direction D is longer than that of the second portion in FIG. 18A.
  • the length of 630b should be longer.
  • the longitudinal section of the second sealing element 650 is in-line, and its length parallel to the second surface S2 is shorter than that of the second sealing element 650 in FIG. 18A.
  • the inner side wall of the second sealing member 650 is in contact with the second portion 630 b of the first sealing member 630.
  • the longitudinal section of the first sealing member 630 is L-shaped and includes a first part 630a and a second part 630b.
  • the second seal 650 includes a third portion 650a and a fourth portion 650b. It can be understood that the third and fourth here are only different from the first and second, and it does not mean that the second sealing member 650 includes four parts.
  • the third portion 650a is sandwiched between the second pole 640 and the second surface S2, the fourth portion 650b is provided in the pole hole 621, and the fourth portion 650b is sandwiched on the pole sink 620. And the second pole boss 641. As shown in FIG.
  • the upper surface of the third portion 650a is in contact with the second surface S2
  • the lower surface of the third portion 650a is in contact with the upper surface of the second pole 640
  • the lower surface of the fourth portion 650b is also in contact with the
  • the upper surface of the second pole 640 is in contact
  • the outer side of the fourth portion 650b is in contact with the sidewall of the pole sinking table 620 extending downward to the second surface S2
  • the inner side of the fourth portion 650b is convex to the second pole.
  • the stage 642 is fully in contact, partially in contact, or not in contact.
  • the third portion 650a and the fourth portion 650b are L-shaped in their longitudinal sections.
  • first sealing member 630 and the second sealing member 650 are integrally formed to form a sealing member 635.
  • the shape of the sealing member 635 is the same as the overall shape of the first sealing member 630 and the second sealing member 650 combined as shown in FIGS. 18A-18C.
  • the first seal 630 and the second seal 650 are in contact with each other.
  • the second part 630b of the first sealing member 630 and the second sealing member 650 are in close contact.
  • the second portion 630b of the first sealing member 630 and the fourth portion 650b of the second sealing member 650 are in close contact.
  • the first sealing member 630 includes a fifth portion 630b sandwiched between the pole sinking platform 620 and the second pole boss 641
  • the second sealing member 650 includes The sixth portion 650b sandwiched between the pole sinking platform 620 and the second pole boss 641
  • the fifth portion 630b includes a first end portion 631 parallel to the first surface S1
  • the sixth portion 650b includes parallel At the second end 651 of the first surface S1, the first end 631 abuts against the second end 651.
  • the fifth part 630b here is the second part 630b of the first sealing element 630
  • the sixth part 650b is the fourth part 650b of the second sealing element 650.
  • Figures 18A-18D are only examples, and are not used to limit the specific structures of the first sealing member 630 and the second sealing member 650. Any modification made on the basis of the embodiment shown in Figures 18A-18D is required by the present invention. In the scope of protection.
  • the power battery top cover of the present invention adopts the first sealing element and the second sealing element to form a double sealing structure for the pole assembly, which greatly improves the reliability of the pole sealing; and the first pole and the second pole are adopted Welding connection, the force generated during the welding process is directly transmitted to the first seal and the second seal, the welding force is consistent with the direction of the compression force of the first seal and the second seal, which is helpful for the first seal and the second seal.
  • the compression of the sealing element and the second sealing element further enhances the sealing performance of the pole post.
  • the power battery top cover has good airtightness, pressure resistance and high temperature resistance.
  • the present invention also includes a power battery, including the power battery top cover of the embodiment of the present invention.
  • Fig. 19 is a schematic structural diagram of a power battery according to an embodiment of the present invention.
  • the power battery 1900 includes the power battery top cover and the battery body 1901 of the present invention.
  • the power battery top cover can be the aforementioned power battery top cover 100 or 1600, wherein the electrode assemblies 200 and 600 can be used as the positive electrodes of the power battery 1900, and the electrode assemblies 300 and 700 can be used as the negative electrodes of the power battery 1900.
  • the power battery of the present invention is a lithium ion battery.
  • the power battery 1900 also has good sealing properties, pressure resistance and high temperature resistance, and is safe and reliable.

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  • Electrochemistry (AREA)
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  • Engineering & Computer Science (AREA)
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  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

本发明涉及一种动力电池顶盖及动力电池，该动力电池顶盖包括：顶盖片包括极柱沉台和极柱孔，极柱沉台凹陷地设置在顶盖片的第一表面中，极柱孔位于极柱沉台中；第一极柱包括第一极柱凸台，第一极柱凸台穿过极柱孔；第一固定件包括第一固定件通孔，第一极柱部分地设置于第一固定件通孔中，第一固定件部分地设置于所述极柱沉台中；第二极柱包括第二极柱凸台，第二极柱凸台包括凸台孔，第一极柱凸台伸入凸台孔，第一极柱与第二极柱电性接触；第一密封件设置在极柱沉台内，并与第一极柱接触；以及绝缘板包括绝缘板通孔，设于顶盖片的第二表面一侧，第二表面是第一表面的反面，第二极柱凸台穿过绝缘板通孔与第一极柱电性接触。

Description

动力电池顶盖和动力电池 技术领域
本发明涉及动力电池领域，尤其涉及一种动力电池顶盖和动力电池。
背景技术
动力电池能够为用电设备提供充足的动力。以锂离子电池为例的动力电池已经在新能源汽车等产品中发挥作用。目前动力电池的顶盖结构中包括极柱、密封圈等，涉及注塑结构、铆接结构和焊接结构等。这样的顶盖结构一方面结构复杂，加工工艺复杂，加工设备庞大，材料成本和加工成本高，另一方面，在铆接结构中，可能会导致密封不良和绝缘性不良的问题；在注塑结构中，可能由于注塑产生的力和密封圈压缩的力方向不一致而导致密封圈压缩不良的问题；在焊接结构中，压缩密封圈所需的力通过焊接环间接传递给极柱，再传递给密封圈，容易造成密封圈压缩不良，从而导致极柱密封不良。此外，现有的动力电池的顶盖结构的极柱过多的占用了动力电池内外空间，降低了动力电池的能力密度，实心的极柱结构还增加了动力电池的重量。
发明内容
本发明要解决的技术问题是提供一种具有简化结构，低成本、低重量，密封性良好的动力电池顶盖及包括该动力电池顶盖的动力电池。
本发明为解决上述技术问题提出一种动力电池顶盖，其特征在于，包括：顶盖片，包括极柱沉台和极柱孔，所述极柱沉台凹陷地设置在所述顶盖片的第一表面中，所述极柱孔位于所述极柱沉台中；第一极柱，包括第一极柱凸台，所述第一极柱凸台穿过所述极柱孔；第一固定件，包括第一固定件通孔，所述第一极柱部分地设置于所述第一固定件通孔中，所述第一固定件部分地设置于所述极柱沉台中；第二极柱，包括第二极柱凸台，所述第二极柱凸台包括凸台孔，所述第一极柱凸台伸入所述凸台孔，所述第一极柱与所述第二极柱电性接触；第一密封件，设置在所述极柱沉台内，并与所述第一极柱接触；以及绝缘板，包括绝缘板通孔，设于所述顶盖片的第二表面一侧，所述第二表面是所述第一表面的反面，所述第二极柱凸台穿 过所述绝缘板通孔与所述第一极柱电性接触。
在本发明的一实施例中，所述第一极柱凸台和所述凸台孔通过焊接连接。
在本发明的一实施例中，所述第一极柱还包括凹槽，所述凹槽位于所述第一极柱的腰部；所述第一固定件还包括凸出部，所述凸出部位于所述第一固定件的腰部，所述凸出部嵌入所述凹槽中。
在本发明的一实施例中，所述第一极柱和所述第一固定件是一体注塑成型或装配连接。
在本发明的一实施例中，所述第一极柱是导电材料，所述第一极柱的材料和所述第一固定件的材料不同。
在本发明的一实施例中，所述第一密封件为环状结构，所述第一密封件的环状面积小于所述第一固定件通孔的孔面积。
在本发明的一实施例中，所述第一密封件包括第一部分和第二部分，所述第一部分夹设于所述第一极柱和所述极柱沉台之间，所述第二部分设于所述极柱孔中，所述第二部分夹设于所述极柱沉台和所述第二极柱凸台之间。
在本发明的一实施例中，所述第一部分和所述第二部分在其纵截面上呈L型。
在本发明的一实施例中，还包括：第二密封件，至少部分夹设在所述第二极柱和所述第二表面之间。
在本发明的一实施例中，所述第二密封件为环状结构，所述第二密封件的环状面积小于所述绝缘板通孔的孔面积。
在本发明的一实施例中，所述第二密封件包括第三部分和第四部分，所述第三部分夹设于所述第二极柱和所述第二表面之间，所述第四部分设于所述极柱孔中，所述第四部分夹设于所述极柱沉台和所述第二极柱凸台之间。
在本发明的一实施例中，所述第三部分和所述第四部分在其纵截面上呈L型。
在本发明的一实施例中，所述第一密封件和所述第二密封件相互接触。
在本发明的一实施例中，所述第一密封件包括夹设于所述极柱沉台和所述第二极柱凸台之间的第五部分，所述第二密封件包括夹设于所述极柱沉台和所述第二极柱凸台之间的第六部分，所述第五部分包括平行于所述第一表面的第一端部，所述第六部分包括平行于所述第一表面的第二端部，所述第一端部与所述第二端部相抵接。
在本发明的一实施例中，所述第一密封件和所述第二密封件是一体成型的。
在本发明的一实施例中，当所述第一极柱和所述第二极柱配合作为动力电池的正极时，所述第一固定件为导电材料或绝缘材料。
在本发明的一实施例中，当所述第一极柱和所述第二极柱配合作为动力电池的负极时，所述第一固定件为绝缘材料。
在本发明的一实施例中，所述顶盖片包括对称分布的两个所述极柱沉台，每个所述极柱沉台中包括一个所述极柱孔，两套所述第一极柱、第一固定件、第二极柱、第一密封件分别对应于所述两个所述极柱沉台和所述极柱孔而设置，其中，一套所述第一极柱和所述第二极柱作为动力电池的正极，另一套所述第一极柱和所述第二极柱作为所述动力电池的负极。
在本发明的一实施例中，所述第二极柱凸台的内部为空心。
在本发明的一实施例中，所述第一极柱凸台的外形为多边形、圆形、椭圆形或跑道形中的一种，所述凸台孔的形状为多边形、圆形、椭圆形或跑道形中的一种，所述第一极柱凸台和所述凸台孔的形状相适配。
本发明为解决上述技术问题还提出一种动力电池，其特征在于，包括如上所述的动力电池顶盖。
在本发明的动力电池顶盖中，第一极柱的第一极柱凸台伸入至第二极柱的凸台孔中，第一极柱和第一固定件通过凹槽和凸出部配合连接，简化了极柱组件的结构，减小了极柱组件占用动力电池内外部的高度空间，提高了动力电池内外部空间的利用率。本发明的动力电池顶盖采用第一密封件和第二密封件，形成对极柱组件的双密封结构，极大地提高极柱密封的可靠性；并且第一极柱和第二极柱采用焊接方式连接，在焊接过程中产生的力直接传递给第一密封件和第二密封件，该焊接力与第一密封件和第二密封件的压缩力的方向一致，有助于对第一密封件和第二密封件的压缩，从而进一步增强极柱的密封性。该动力电池顶盖具有良好的密封性、耐压性和耐高温性。包括该动力电池顶盖的动力电池具有良好的密封性、耐压性和耐高温性，安全可靠。
附图概述
本发明的特征、性能由以下的实施例及其附图进一步描述。
图1A是本发明一实施例的动力电池顶盖的立体结构示意图；
图1B是本发明一实施例的动力电池顶盖的俯视示意图；
图2是本发明一实施例的动力电池顶盖的爆炸示意图；
图3A-3C是本发明一实施例的动力电池顶盖的剖视示意图；
图4A-4C是本发明一实施例的动力电池顶盖的第一极柱210的形状示意图；
图5A-5C是本发明一实施例的动力电池顶盖的第二极柱240的形状示意图；
图6A-6C是本发明另一实施例的动力电池顶盖的第一极柱210的形状示意图；
图7A-7C是本发明另一实施例的动力电池顶盖的第二极柱240的形状示意图；
图8A-8C是本发明一实施例的动力电池顶盖的第一极柱310的形状示意图；
图9A-9C是本发明一实施例的动力电池顶盖的第二极柱340的形状示意图；
图10A-10C是本发明另一实施例的动力电池顶盖的第一极柱210的形状示意图；
图11A-11C是本发明另一实施例的动力电池顶盖的第二极柱240的形状示意图；
图12A是本发明另一实施例的动力电池顶盖的立体示意图；
图12B是图12A所示实施例的动力电池顶盖的爆炸示意图；
图13A和13B是本发明另一实施例的动力电池顶盖的第一极柱210的结构示意图；
图14A和14B是本发明另一实施例的动力电池顶盖的第二极柱240的结构示意图；
图15是本发明一实施例的动力电池顶盖的绝缘板底板的结构示意图；
图16是本发明另一实施例的动力电池顶盖的爆炸示意图；
图17A-17C是本发明一实施例的动力电池顶盖的剖视示意图；
图18A-18D是本发明的动力电池顶盖的第一密封件和第二密封件的四种实 施方式；
图19是本发明一实施例的动力电池的结构示意图。
本发明的较佳实施方式
为让本发明的上述目的、特征和优点能更明显易懂，以下结合附图对本发明的具体实施方式作详细说明。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是本发明还可以采用其它不同于在此描述的其它方式来实施，因此本发明不受下面公开的具体实施例的限制。
如本申请和权利要求书中所示，除非上下文明确提示例外情形，“一”、“一个”、“一种”和/或“该”等词并非特指单数，也可包括复数。一般说来，术语“包括”与“包含”仅提示包括已明确标识的步骤和元素，而这些步骤和元素不构成一个排它性的罗列，方法或者设备也可能包含其他的步骤或元素。
在详述本发明实施例时，为便于说明，表示器件结构的剖面图会不依一般比例作局部放大，而且所述示意图只是示例，其在此不应限制本发明保护的范围。此外，在实际制作中应包含长度、宽度及深度的三维空间尺寸。
为了方便描述，此处可能使用诸如“之下”、“下方”、“低于”、“下面”、“上方”、“上”等等的空间关系词语来描述附图中所示的一个元件或特征与其他元件或特征的关系。将理解到，这些空间关系词语意图包含使用中或操作中的器件的、除了附图中描绘的方向之外的其他方向。例如，如果翻转附图中的器件，则被描述为在其他元件或特征“下方”或“之下”或“下面”的元件的方向将改为在所述其他元件或特征的“上方”。因而，示例性的词语“下方”和“下面”能够包含上和下两个方向。器件也可能具有其他朝向(旋转90度或处于其他方向)，因此应相应地解释此处使用的空间关系描述词。此外，还将理解，当一层被称为在两层“之间”时，它可以是所述两层之间仅有的层，或者也可以存在一个或多个介于其间的层。
在本申请的上下文中，所描述的第一特征在第二特征之“上”的结构可以包括第一和第二特征形成为直接接触的实施例，也可以包括另外的特征形成在第一和第二特征之间的实施例，这样第一和第二特征可能不是直接接触。
应当理解，当一个部件被称为“在另一个部件上”、“连接到另一个部件”、“耦合于另一个部件”或“接触另一个部件”时，它可以直接在该另一个部件 之上、连接于或耦合于、或接触该另一个部件，或者可以存在插入部件。相比之下，当一个部件被称为“直接在另一个部件上”、“直接连接于”、“直接耦合于”或“直接接触”另一个部件时，不存在插入部件。同样的，当第一个部件被称为“电接触”或“电耦合于”第二个部件，在该第一部件和该第二部件之间存在允许电流流动的电路径。该电路径可以包括电容器、耦合的电感器和/或允许电流流动的其它部件，甚至在导电部件之间没有直接接触。
本发明提供了一种动力电池顶盖，包括：顶盖片，包括极柱沉台和极柱孔，极柱沉台凹陷地设置在顶盖片的第一表面中，极柱孔位于极柱沉台中；第一极柱，包括第一极柱凸台，第一极柱凸台穿过极柱孔；第一固定件，包括第一固定件通孔，第一极柱部分地设置于第一固定件通孔中，第一固定件部分地设置于极柱沉台中；第二极柱，包括第二极柱凸台，第二极柱凸台包括凸台孔，第一极柱凸台伸入凸台孔，第一极柱与第二极柱电性接触；第一密封件，设置在极柱沉台内，并与第一极柱接触；以及绝缘板，包括绝缘板通孔，设于顶盖片的第二表面一侧，第二表面是第一表面的反面，第二极柱凸台穿过绝缘板通孔与第一极柱电性接触。
其中，第一极柱、第一固定件、第二极柱和第一密封件可以组成动力电池的极柱组件，用于形成动力电池的电极。本发明对动力电池的电极数量不做限制。可以理解，极柱组件的数量与动力电池的电极数量相对应。通常，动力电池包括两个电极，即正电极和负电极。本发明实施例中的极柱组件可以作为动力电池的正电极或负电极。本说明书的附图将以用于具有两个电极的动力电池的动力电池顶盖为例进行说明。在该实施例中，动力电池顶盖包括对称设置的两组极柱组件。
图1A是本发明一实施例的动力电池顶盖的立体结构示意图。图1B是本发明一实施例的动力电池顶盖的俯视示意图。结合图1A和1B所示，动力电池顶盖100包括顶盖片110、两个极柱组件200、300和绝缘板400，每个极柱组件中都包括一套第一极柱、第一固定件、第二极柱和第一密封件(图未示)，关于极柱组件200、300的具体结构将在下文中结合其他附图展开。
参考图1A所示，动力电池顶盖100的顶盖片110为矩形的板状结构，在实际使用中，其沿方向D所指的方向放置，顶盖片110的第一表面S1位于上面或称正面，顶盖片120的第二表面S2位于下面或称底面，第二表面S2是第一表面S1的反面。
参考图1A所示，绝缘板400位于顶盖片110的第二表面S2一侧。绝缘板400为与顶盖片110的形状、大小相适应的板状结构。在绝缘板400远离顶盖片110 的第二表面S2的底面上具有3个连接部401，用于将动力电池顶盖100装配到动力电池中位于动力电池顶盖下方的其他部件，例如电池本体上。
参考图1A和1B所示，在一些实施例中，在顶盖片110上还包括用于安装防爆组件的防爆安装孔140；顶盖片110上还包括注液孔150，通过该注液孔150可以给电池注液，注液完成之后可以将该注液孔150密封起来。
图1A和1B不用于限制本发明的动力电池顶盖100的顶盖片110的具体大小和形状，极柱组件200、300、防爆安装孔140和注液孔150的大小、形状、在顶盖片110上的具体位置等，连接部401的具体形状、数量等。
图2是本发明一实施例的动力电池顶盖的爆炸示意图。图2是对应于图1A和1B所示实施例的动力电池顶盖100的爆炸图，其中示出了极柱组件200、300的组成构件、顶盖片110中的具体构件以及绝缘板400中的具体构件。
参考图2所示，该动力电池顶盖100中的顶盖片110包括极柱沉台120、130和极柱孔121、131，极柱孔121位于极柱沉台120中，极柱孔131位于极柱沉台130中。极柱沉台120、130凹陷地设置在顶盖片110的第一表面S1中，也就是说极柱沉台120、130相对于第一表面S1来说下沉式的位于顶盖片110中，极柱沉台120、130和第一表面S1形成具有一定高度的台阶状，该台阶的高度即极柱沉台120、130下沉入顶盖片110中的沉降高度。极柱沉台120、130是用于安装极柱组件200、300，极柱沉台120、130也可以称为安装凹槽，极柱孔121、131设置在安装凹槽的底部，极柱孔121、131也可以被称为安装通孔。
参考图2所示，第一极柱210、第一固定件220、第二极柱240和第一密封件230组成前文所述的极柱组件200，第一极柱310、第一固定件320、第二极柱340和第一密封件330组成前文所述的极柱组件300。极柱组件200、300用于使动力电池与外部装置电性连接。如图2所示，在一些实施例中，在顶盖片110的第一表面S1还可以包括电极指示标志101、102，其中电极指示标志101为“+”，表示其附近的极柱组件200与动力电池的电芯正极耳相连接，电极指示标志102为“-”，表示其附近的极柱组件300与动力电池的电芯负极耳相连接。具体地，第二极柱240与电芯正极耳通过一种转接片连接，第二极柱340与电芯负极耳通过另一种转接片连接，从而实现电芯与外部装置的电性连接。
参考图2所示，极柱沉台120和极柱孔121配合极柱组件200来形成动力电池的一个电极，极柱沉台130和极柱孔131配合极柱组件300来形成动力电 池的另一个电极。
在一些实施例中，极柱沉台120和极柱沉台130的形状、大小相同，并对称的设置在顶盖片110中。
在一些实施例中，极柱沉台120和极柱沉台130的形状、大小不同。
在一些实施例中，极柱沉台120和极柱沉台130非对称地设置在顶盖片110中。
在一些实施例中，极柱孔121和极柱孔131的形状、大小相同，极柱孔121和极柱孔131分别在极柱沉台120和极柱沉台130中的相对位置也相同。
在一些实施例中，极柱孔121和极柱孔131的形状、大小不同。
在一些实施例中，极柱孔121和极柱孔131分别在极柱沉台120和极柱沉台130中的相对位置不同。
极柱沉台和极柱孔的大小、形状和位置应与其所对应的极柱组件的大小、形状相对应。
由于极柱组件200、300的主要结构相同，以下将以极柱沉台120、极柱孔121和极柱组件200为例进行说明，对于极柱组件200和300的区别之处将特别指出。
参考图2所示，第一极柱210包括第一极柱凸台(图未示)，该第一极柱凸台穿过顶盖片110上的极柱孔121。在图2所示的视角中，第一极柱凸台凸出地设置在第一极柱210的下表面。
第一固定件220包括第一固定件通孔221，第一极柱210部分地设置于第一固定件通孔221中，第一固定件220部分地设置在极柱沉台120中。
第二极柱240包括第二极柱凸台241，该第二极柱凸台241包括凸台孔242，在装配好的动力电池顶盖100中，第一极柱凸台伸入至该凸台孔242中，第一极柱210和第二极柱240电性接触。第一极柱凸台和凸台孔242的形状相适配或相同。
第一密封件230设置在极柱沉台120内，并与第一极柱210接触。
绝缘板400包括绝缘板通孔420、430，其中绝缘板通孔420对应于极柱组件200，绝缘板通孔430对应于极柱组件300。以绝缘板通孔420为例，该绝缘板通孔420在绝缘板400上的位置及其大小、形状应与极柱孔121、第一极柱凸台、第二极柱凸台241相适应，以使第二极柱凸台241穿过该绝缘板通孔420与第一极柱210电性连接。绝缘板400设于顶盖片110的第二表面S2一侧。
参考图2所示，绝缘板400上还包括防爆阀孔440和注液孔450。其中，防爆阀孔440的形状、大小和位置与顶盖片110上的防爆安装孔140相对应。
在一些实施例中，该动力电池顶盖100还包括保护贴片141和防爆片142。防爆安装孔140、保护贴片141、防爆片142和防爆阀孔440一起组成防爆阀组件。防爆片142与防爆安装孔140通过焊接进行装配和密封。保护贴片141贴在顶盖片110上，实现对防爆组件的密封。防爆阀孔440从朝向第二表面S2的方向罩住防爆片142，从而对防爆阀组件进行保护。
在一些实施例中，保护贴片141的材质为PET或其他塑胶材质，防爆片142的材质为铝材质或铝合金材质。
参考图2所示，注液孔450的形状、大小和位置与顶盖片110上的注液孔150相对应。注液孔450的形状、大小可以不同于注液孔150，只要可以实现通过注液孔150和注液孔450向电池注液即可。
在一些实施例中，注液孔450为支撑通孔结构，有利于电解液注液后快速地在电池内部浸润。
在一些实施例中，绝缘板400的材质为PP或其他具有良好的耐腐蚀性能和耐高温性能的塑胶材质。绝缘板400可以采用塑胶材料一体成型，并且设置在顶盖片110的下方，因此绝缘板400也可称为一体化下塑胶。
图3A-3C是本发明一实施例的动力电池顶盖的剖视示意图。图3A-3C是沿着图2中所示的AA'线所获得的剖视图。其中，图3A是图1-3所示的动力电池顶盖100的剖视示意图，其中包括顶盖片110，极柱组件200、300和绝缘板400。其中，极柱组件200中包括第一极柱210、第一固定件220、第二极柱240和第一密封件230；极柱组件300中包括第一极柱310、第一固定件320、第二极柱340和第一密封件330。保护贴片141、防爆片142等防爆阀组件设置在顶盖片110的中间部，极柱组件200、300分别对称地设置在顶盖片110的两端。
图3B是包括极柱组件200的部分结构的局部放大示意图。参考图3B所示，第一极柱210包括第一极柱凸台211。将第一极柱210除第一极柱凸台211以外的部分称为极柱本体212。结合图2所示，极柱本体212部分地设置于第一固定件通孔221中，极柱本体212沿方向D有一部分凸出于第一固定件通孔221之外。第一极柱凸台211穿过极柱孔121并伸入凸台孔242中，第一极柱210和第二极柱240通过第一极柱凸台211和凸台孔242电性接触。参考图3B所 示，第一极柱210的极柱本体212的下表面还与第二极柱220的第二极柱凸台241的上表面相接触，第一极柱210和第二极柱240还通过极柱本体212的下表面和第二极柱凸台241的上表面电性接触。
参考图3B所示，第一密封件230设置在极柱沉台120内，并与第一极柱210的极柱本体212的下表面接触。
在一些实施例中，第一密封件230包括第一部分231和第二部分232，第一部分231夹设于第一极柱210和极柱沉台120之间，第二部分232设于极柱孔121中，第二部分232夹设于极柱沉台120和第二极柱凸台241之间。如图3B所示，第一部分231的上表面与极柱本体212的下表面相接触，第一部分231的下表面与极柱沉台120的上表面相接触；第二部分232的上表面也与极柱本体212的下表面相接触，第二部分232的外侧面与极柱沉台120向下延伸至第二表面S2的侧壁相接触，第二部分232的内侧面与第二极柱凸台242全部接触、部分接触或不接触。
在一些实施例中，第一部分231和第二部分232在其纵截面上呈L型。如图3B所示，第一部分231和第二部分232在其纵截面上呈倒置的L型。作为该L型的两个边，第一部分231和第二部分232可以相互垂直，也可以形成一定的角度。
在图2所示的实施例中，极柱沉台120为正方形，第一固定件220的外部形状大致为正方形，极柱孔121、第一固定件通孔221、第二极柱凸台241和凸台孔242都是圆形，第一密封件230是圆环状。第一密封件230可以实现为密封圈。假设极柱沉台120的边长为D1，第一固定件通孔221的直径为D2，第一密封件230的外圈直径为D3，第一密封件230的内圈直径为D4，凸台孔242的直径为D5，则D1>D2>D3>D4>D5。
参考图3B所示，第一固定件220部分地嵌入在极柱沉台120中，第一固定件220的外侧壁与极柱沉台120向上延伸至第一表面S1的侧壁接触。第一固定件220的上部凸出于极柱沉台120之外，并且凸出于第一表面S1。
在图3B所示的实施例中，第一密封件230为环状结构，第一密封件230的环状面积小于第一固定件通孔221的孔面积。如图3B所示，第一密封件230的外圈直径D3小于第一固定件通孔221的直径D2。
在图3B所示的实施例中，极柱组件200用作动力电池的正极，第一固定件220为导电材料或绝缘材料。当第一固定件220为导电材料时，其可以是导电塑胶，电阻值为0～10000欧姆，第一固定件220与顶盖片110处于导通状态。当第一固定件220为绝缘材料时，其可以是绝缘塑胶，电阻值为大于200兆欧姆，第一固定件 220与顶盖片110之间绝缘。当第一固定件220为塑胶材质时，由于其位于顶盖片110的上方，可以被称为上塑胶。
在一些实施例中，顶盖片110的材质是铝材质或铝合金材质。
在一些实施例中，第一极柱凸台211和凸台孔242通过焊接连接，例如激光焊接。
结合图2和图3B所示，在安装动力电池顶盖100时，先将第一密封件230放置在极柱沉台120中，再将第一固定件220安装在顶盖片110的极柱沉台120向上延伸至第一表面S1的侧壁内，将第一极柱210放置于极柱沉台120和第一固定件通孔221中，与第一固定件220和第一密封件230实现紧密接触。再将第二极柱240穿过绝缘板400上的绝缘板通孔420和极柱孔121，使第一极柱凸台211与凸台孔242紧密接触。最后采用激光焊接将第一极柱凸台211与凸台孔242的接触面沿着缝隙焊接在一起，或者再将第一极柱210的极柱主体212的下表面与第二极柱240的第二极柱凸台241的上表面的接触面之间增加一道或若干道焊接，实现极柱组件200的固定和密封。
在一些实施例中，当极柱组件200用于动力电池的正极时，第一极柱210和第二极柱240的材质可以是铝材质或铝合金材质。
在一些实施例中，第一固定件220的材质可以是一种具有良好的耐腐蚀性能和耐高温性能的塑料材质。
在一些实施例中，第一密封件230的材质可以是一种具有一定弹性的橡胶材质。
参考图3B所示，在一些实施例中，在第一极柱210的顶部还包括顶部凹槽213。在该实施例中，顶部凹槽213与第一极柱凸台211的形状相似，都为圆形，且凹槽213的凹陷深度与第一极柱凸台211的凸出高度基本上相等。
在一些实施例中，在顶部凹槽213中设有铆接孔213a用于铆接。
在其他的实施例中，顶部凹槽213和第一极柱凸台211的形状可以为多边形、圆形、椭圆形、跑道形，或在这些形状的基础上增加圆角或键槽的变形等形状。
参考图3B所示，在一些实施例中，第二极柱240中的凸台孔242与第一极柱凸台211的形状一样。
在一些实施例中，第一极柱210的外形可以为多边形、圆形、椭圆形、跑道形，或在这些形状的基础上增加圆角或键槽的变形等形状。
图3C是包括极柱组件300的部分结构的局部放大示意图。极柱组件300 的大部分结构与极柱组件200，相同的部分不再赘述。下面参考图3C所示说明极柱组件300不同于极柱组件200之处。如图3C所示，第一固定件320、第二极柱340和第一密封件330分别与第一固定件220、第二极柱240和第一密封件230相同。第一极柱310包括第一极柱凸台311。将第一极柱310除第一极柱凸台311以外的部分称为极柱本体312。与极柱本体212不同的是，极柱本体312沿着方向D分为两部分，分别是上部312a和下部312b，并且该两部分分别都具有凸台，因此，将第一极柱凸台311也分为两部分，分别是上凸台311a和下凸台311b。上部312a和下部312b可以是一体成型的，也可以是分离的两部分组合而成。其中，下凸台311b伸入至第二极柱340的凸台孔342中。
在一些实施例中，当极柱组件300用于动力电池的负极时，第一极柱310的材质可以为铜铝复合材质，其中，上部312a的材质可以是铝材质或铝合金材质，下部312b的材质可以是铜材质或铜合金材质；第二极柱340的材质可以是铜材质或铜合金材质。第一固定件320的材质可以是一种具有良好的耐腐蚀性能和耐高温性能的塑料材质。第一密封件330的材质可以是一种具有一定弹性的橡胶材质。
参考图3C所示，在一些实施例中，在第一极柱310的顶部还包括顶部凹槽313。在该实施例中，顶部凹槽313与第一极柱凸台311的形状相似，都为圆形，且凹槽313的凹陷深度与第一极柱凸台311的凸出高度基本上相等。
在其他的实施例中，顶部凹槽313和第一极柱凸台311的形状可以为多边形、圆形、椭圆形、跑道形，或在这些形状的基础上增加圆角或键槽的变形等形状。
参考图3C所示，在一些实施例中，第二极柱340中的凸台孔342与第一极柱凸台311的形状一样。
在一些实施例中，第一极柱310的外形可以为多边形、圆形、椭圆形、跑道形，或在这些形状的基础上增加圆角或键槽的变形等形状。
在一些实施例中，第一极柱210和第一极柱310的外观形状可以相同，也可以不同。不同的优点在于能够实现防错，避免工艺过程中将正负极极柱装反，导致电池腐蚀。第二极柱240和第二极柱340的外观形状可以相同，也可以不同。
本发明的动力电池顶盖中，将第一极柱的第一极柱凸台伸入至第二极柱的凸台孔中，减小了极柱组件占用动力电池内外部的高度空间，提高了动力电池内外部空间的利用率。
图4A-4C是本发明一实施例的动力电池顶盖的第一极柱210的形状示意图。其中，图4A是仰视图，第一极柱210的外形为具有圆角的长方形，并且在右上角具有切角214，圆形的第一极柱凸台211位于第一极柱210的中央部位。切角214可以方便安装时确定方向。图4B是侧视剖视图，与图3A-3B的视角相同。从图4B可见顶部凹槽213和第一极柱凸台211相对的设置在第一极柱210的相对的两个表面上。图4C是俯视图，可见顶部凹槽213位于第一极柱210的中央部位，切角214在该图中位于右下角。
图5A-5C是本发明一实施例的动力电池顶盖的第二极柱240的形状示意图。其中，图5A是仰视图，第二极柱240的外形为具有圆角的正方形，圆形的凸台孔242位于第二极柱240的中央部位。图5B是侧视剖视图，可见第二极柱凸台241凸出于第二极柱240的表面，凸台孔242位于第二极柱凸台241的中央部位。图5C是俯视图，可见第二极柱凸台241位于第二极柱240的中央部位，凸台孔242位于第二极柱凸台241的中央部位。
在一些实施例中，第二极柱凸台241的内部241a为空心，如图5B所示，第二极柱凸台241顶部厚度T为0.1-5mm。
图6A-6C是本发明另一实施例的动力电池顶盖的第一极柱210的形状示意图。其中，图6A是仰视图，图6B是侧视剖视图，图6C是俯视图。该实施例中的第一极柱210与图4A-4C所示的第一极柱210的不同之处在于，第一极柱凸台211和顶部凹槽213的形状不同。参考图6A-6C所示，该实施例中的第一极柱凸台211和顶部凹槽213都大致为椭圆形，并且在图6A和6C所示的视角中，具有向上方和下方凸出的键槽。
图7A-7C是本发明另一实施例的动力电池顶盖的第二极柱240的形状示意图。其中，图7A是仰视图，图7B是侧视剖视图，图7C是俯视图。该实施例中的第二极柱240与图5A-5C所示的第二极柱240的不同之处在于，凸台孔242的形状不同，并且第二极柱240的轮廓还包括切角243。参考图7A-7C所示，该实施例中的凸台孔242大致为椭圆形，并且在图6A和6C所示的视角中，具有向上方和下方凸出的键槽，与图6A-6C中所示的第一极柱凸台211和顶部凹槽213的形状类似。
图8A-8C是本发明一实施例的动力电池顶盖的第一极柱310的形状示意图。第一极柱310包括在极柱组件300中，极柱组件300可作为动力电池的负极。其中，图8A是仰视图，第一极柱310的外形为具有圆角的长方形，并且 在左上角具有切角314，圆形的第一极柱凸台811位于第一极柱810的中央部位。切角314可以方便安装时确定方向。图8B是侧视剖视图，与图3A-3B的视角相同。从图8B可见顶部凹槽313和第一极柱凸台311相对的设置在第一极柱310的相对的两个表面上。图8C是俯视图，可见顶部凹槽313位于第一极柱310的中央部位，切角314在该图中位于左下角。
图9A-9C是本发明一实施例的动力电池顶盖的第二极柱340的形状示意图。其中，图9A是仰视图，第二极柱340的外形为具有圆角的正方形，并且在右下角具有切角343，圆形的凸台孔342位于第二极柱340的中央部位。图9B是侧视剖视图，可见第二极柱凸台341凸出于第二极柱340的表面，凸台孔342位于第二极柱凸台341的中央部位。图9C是俯视图，可见第二极柱凸台341位于第二极柱340的中央部位，凸台孔342位于第二极柱凸台341的中央部位，切角343在该图中位于右上角。
在一些实施例中，第二极柱凸台341的内部341a为空心，如图9B所示，第二极柱凸台341顶部厚度T为0.1-5mm。
第二极柱凸台241、341的内部241a、341a采用空心的设计，可以减轻动力电池顶盖的重量。
图10A-10C是本发明另一实施例的动力电池顶盖的第一极柱210的形状示意图。其中，图10A是仰视图，图10B是侧视剖视图，图10C是俯视图。该实施例中的第一极柱210与图8A-8C所示的第一极柱210的不同之处在于，第一极柱凸台211和顶部凹槽213的形状不同，切角314在图8A中位于左下角。参考图10A-10C所示，该实施例中的第一极柱凸台211和顶部凹槽213都大致为椭圆形，并且在图10A和10C所示的视角中，具有向上方和下方凸出的键槽。
图11A-11C是本发明另一实施例的动力电池顶盖的第二极柱240的形状示意图。其中，图11A是仰视图，图11B是侧视剖视图，图11C是俯视图。该实施例中的第二极柱240与图9A-9C所示的第二极柱240的不同之处在于，凸台孔242的形状不同，切角343在图11A中位于左上角。参考图11A-11C所示，该实施例中的凸台孔242大致为椭圆形，并且在图11A和11C所示的视角中，具有向上方和下方凸出的键槽，与图10A-10C中所示的第一极柱凸台211和顶部凹槽213的形状类似。
图12A是本发明另一实施例的动力电池顶盖的立体示意图。图12B是图12A所示实施例的动力电池顶盖的爆炸示意图。在图12A和12B所示的实施例 中，第一电极210、310的外形为圆形，第一固定件220、320的外形为圆形，极柱沉台120、130的外形也为圆形。在该实施例中，第一密封件230、330和第一固定件220、320都为圆环状。需要说明，尽管在图12B中第一密封件230、330位于第一固定件220、320的上方，但是第一密封件230、330的外圈直径小于第一固定件220、320的外圈直径，因此装配之后，第一密封件230、330分别位于第一固定件220、230中的第一固定件通孔221、321中。
图13A和13B是本发明另一实施例的动力电池顶盖的第一极柱210的结构示意图。其中，图13A是仰视图，图13B是侧视图。在该实施例中，第一极柱210的第一极柱凸台211为跑道形。
图14A和14B是本发明另一实施例的动力电池顶盖的第二极柱240的结构示意图。其中，图14A是仰视图，图14B是侧视图。在该实施例中，第二极柱240中的凸台孔242为跑道形，可以与图13A和13B所示实施例中的第一极柱凸台211相互配合。
根据图13A、13B、14A和14B所示的实施例，相互配合的第一技术凸台211和凸台孔242都为跑道形，能够增长第一极柱210和第二极柱240的焊接轨迹，从而提高极柱组件200、300的受力强度和过流能力。
图15是本发明一实施例的动力电池顶盖的绝缘板底板的结构示意图。结合图2和图15所示，绝缘板底板460位于绝缘板440的底部。绝缘板底板460上包括防爆阀孔440和注液孔451。该防爆阀孔440包括多孔结构。绝缘板底板460上还包括绝缘板通孔421、431。在图2所示的实施例中，在绝缘板底板460的上表面还具有一平板，绝缘板通孔420、430、注液孔450实际上位于该平板上。图15中所示的位于绝缘板底板460上的绝缘板通孔421、431和注液孔451分别对应于绝缘板通孔420、430和注液孔450。
图16是本发明另一实施例的动力电池顶盖的爆炸示意图。参考图16所示，该实施例的动力电池顶盖1600包括顶盖片510、绝缘板800以及由第一极柱610、第一固定件620、第二极柱640、第一密封件630和第二密封件650组成的极柱组件600，和由第一极柱710、第一固定件720、第二极柱740、第一密封件730和第二密封件750组成的极柱组件700。
在该实施例中，顶盖片510包括极柱沉台520、530和极柱孔521、531，极柱沉台520、530凹陷地设置在顶盖片510的第一表面S1中，极柱孔521、531位于极柱沉台520、530中。
极柱组件600、700的主要结构相同。以极柱组件600为例，在图16所示的实施例中，第一极柱610包括第一极柱凸台(图未示)，该第一极柱凸台穿过顶盖片510上的极柱孔521。在图16所示的视角中，第一极柱凸台凸出地设置在第一极柱610的下表面。
第一固定件620包括第一固定件通孔621，第一极柱610部分地设置于第一固定件通孔621中，第一固定件620部分地设置在极柱沉台520中。
第二极柱640包括第二极柱凸台641，该第二极柱凸台641包括凸台孔642，在装配好的动力电池顶盖1600中，第一极柱凸台伸入至该凸台孔642中，第一极柱610和第二极柱640电性接触。
第一密封件630设置在极柱沉台520内，并与第一极柱610接触。
绝缘板800包括绝缘板通孔820、830，其中绝缘板通孔820对应于极柱组件600，绝缘板通孔830对应于极柱组件700。以绝缘板通孔820为例，该绝缘板通孔820在绝缘板800上的位置及其大小、形状应与极柱孔621、第一极柱凸台、第二极柱凸台641相适应，以使第二极柱凸台641穿过该绝缘板通孔820与第一极柱610电性连接。绝缘板800设于顶盖片510的第二表面S2一侧。
图16的实施例中的大部分结构与图2所示的实施例相同，相同的内容不再赘述。图2-图15以及对应的说明内容都可以用于说明图16所示的实施例。
参考图16所示，该实施例的第一极柱610还包括凹槽611，凹槽611位于第一极柱610的腰部；第一固定件620还包括凸出部622，凸出部622位于第一固定件620的腰部，凸出部622嵌入凹槽611中。
在一些实施例中，第一极柱610和第一固定件620是一体注塑成型或装配连接。根据这些实施例，在组装动力电池顶盖1600时，先将第一极柱610和第一固定件620通过一体注塑成型或装配连接配合固定好，再将该配合固定好的第一极柱610和第一固定件620放入极柱沉台520内。第一极柱610和第一固定件620的结构简单，节省空间，密封性好。
在一些实施例中，第一极柱610是导电材料，第一极柱610的材料和第一固定件620的材料不同。当极柱组件600作为动力电池的正极时，第一固定件620的材料可以是导电材料，也可以是绝缘材料。当所示第一固定件620是导电材料时，其材质与第一极柱610的材质不同。
在图16所示的实施例中，该动力电池顶盖1600还包括第二密封件650，至少部分夹设在第二极柱640和第二表面S2之间。
图17A-17C是本发明一实施例的动力电池顶盖的剖视示意图。图17A-17C与图3A-3C的视角相同。其中，图17A是动力电池顶盖1600的剖视示意图，其中包括顶盖片510，电极组600、700和绝缘板800。其中，极柱组件600中包括第一极柱610、第一固定件620、第二极柱640、第一密封件630和第二密封件650；极柱组件700中包括第一极柱710、第一固定件720、第二极柱740、第一密封件730和第二密封件750。
图17B是图17A中包括极柱组件600的局部放大示意图。参考图17B所示，在正常使用时，第一极柱610沿方向D具有一定的高度，凹槽611位于第一极柱610的腰部，即凹槽611位于第一极柱610高度方向的中间部位。相应地，第一固定件620的凸出部622也位于第一固定件620的腰部，凸出部622的位置、大小和形状都与凹槽611相适应，以使凸出部622可以嵌入凹槽611中，使第一极柱610和第一固定件620形成紧密接触的结构。第一极柱610的第一极柱凸台612伸入第二极柱凸台641的凸台孔642中。
参考图17B所示，第一密封件630与图3B所示实施例中的第一密封件230的位置、大小、结构都类似。在图17B所示的实施例中，第二密封件650至少部分夹设在第二极柱640和第二表面S2之间。
在一些实施例中，当极柱组件600用于动力电池的正极时，第一极柱610和第二极柱640的材质可以是铝材质或铝合金材质。
图17C是图17A中包括极柱组件700的局部放大示意图。参考图17C所示，第一极柱710的腰部具有凹槽711，第一固定件720的腰部具有凸出部722，与极柱组件600类似地，凸出部722嵌入凹槽711中，使第一极柱710和第一固定件720形成紧密接触的结构。
图17C所示的极柱组件700中的第二密封件750与极柱组件600中的第二密封件650相似。极柱组件700与极柱组件600的区别在于，第一极柱710的极柱本体712沿着方向D分为两部分，分别是上部712a和下部712b，并且该两部分分别都具有凸台，因此，将第一极柱凸台713也分为两部分，分别是上凸台713a和下凸台713b。上部712a和下部712b可以是一体成型的，也可以是分离的两部分组合而成。其中，下凸台713b伸入至第二极柱740的第二极柱凸台741中的凸台孔742中。
在一些实施例中，当极柱组件700用于动力电池的负极时，第一极柱710的材质可以为铜铝复合材质，其中，上部712a的材质可以是铝材质或铝合金材 质，下部712b的材质可以是铜材质或铜合金材质；第二极柱740的材质可以是铜材质或铜合金材质。第一固定件720的材质可以是一种具有良好的耐腐蚀性能和耐高温性能的塑料材质。第一密封件730的材质可以是一种具有一定弹性的橡胶材质。
本发明的动力电池顶盖1600通过第一极柱的凹槽和第一固定件的凸出部相互配合，并且可以通过注塑的方式连接第一极柱和第一固定件，结构简单稳固，具有较好的密封性。
图18A-18D是本发明的动力电池顶盖的第一密封件和第二密封件的四种实施方式。图18A-18D可以作为图17B中包括第一密封件630和第二密封件650的结构的局部放大示意图，其中忽略了除第一密封件630和第二密封件650之外的其他元件。图18A-18D还可以作为图17C中包括第一密封件730和第二密封件750的结构的局部放大示意图。在18A-18D中以第一密封件630和第二密封件650为例进行说明，同样适用于说明第一密封件730和第二密封件750。
在图18A所示的实施方式中，第一密封件630包括第一部分630a和第二部分630b，结合图17B所示，第一部分630a夹设于第一极柱610和极柱沉台620之间，第二部分630b设于极柱孔621中，第二部分630b夹设于极柱沉台620和第二极柱凸台641之间。如图17B所示，第一部分630a的上表面与极柱本体613的下表面相接触，第一部分630a的下表面与极柱沉台720的上表面相接触；第二部分630b的上表面也与极柱本体613的下表面相接触，第二部分630b的外侧面与极柱沉台620向下延伸至第二表面S2的侧壁相接触，第二部分630b的内侧面与第二极柱凸台642全部接触、部分接触或不接触。
在图18A所示的实施方式中，第一部分630a和第二部分630b在其纵截面上呈L型，如图18A所示的倒置的L型，表示第一密封件630为具有凸棱的环状结构第一部分630a为环状结构，第二部分630b为环状的凸棱。
在图18A所示的实施方式中，第二密封件650的纵截面为一字型，表示其为圆环状。结合图17B所示，第二密封件650夹设在第二极柱640和第二表面S2之间，第二密封件650沿方向D的上表面与第二表面S2接触，第二密封件650的下表面与第二极柱640的上表面接触，第二密封件650的内侧壁与第二极柱凸台641的外侧壁接触或不接触。
在图18B所示的实施方式中，在图18A所示的基础上，第一密封件630的纵截面为倒置的L型，第二部分630b沿方向D的长度比图18A中的第二部分630b 的长度要长，相应地，第二密封件650的纵截面为一字型，其平行于第二表面S2的长度较图18A中的第二密封件650短。结合图17B所示，第二密封件650的内侧壁与第一密封件630的第二部分630b相接触。
在图18C所示的实施方式中，第一密封件630的纵截面为L型，包括第一部分630a和第二部分630b。第二密封件650包括第三部分650a和第四部分650b。可以理解，这里的第三、第四仅为区别于第一、第二，并不表示第二密封件650包括四个部分。结合图17B所示，第三部分650a夹设于第二极柱640和第二表面S2之间，第四部分650b设于极柱孔621中，第四部分650b夹设于极柱沉台620和第二极柱凸台641之间。如图17B所示，第三部分650a的上表面与第二表面S2相接触，第三部分650a的下表面与第二极柱640的上表面相接触；第四部分650b的下表面也与第二极柱640的上表面相接触，第四部分650b的外侧面与极柱沉台620向下延伸至第二表面S2的侧壁相接触，第四部分650b的内侧面与第二极柱凸台642全部接触、部分接触或不接触。
在图18C所示的实施方式中，第三部分650a和第四部分650b在其纵截面上呈L型。
在图18D所示的实施方式中，第一密封件630和第二密封件650是一体成型的，形成一个密封件635。该密封件635的外形与图18A-18C所示的第一密封件630和第二密封件650结合起来的整体外形相同。
在一些实施例中，第一密封件630和第二密封件650相互接触。如图18A和18B所示的实施例，第一密封件630的第二部分630b和第二密封件650紧密接触。如图18C所示的实施例，第一密封件630的第二部分630b和第二密封件650的第四部分650b紧密接触。
结合图17B和18C所示，在一些实施例中，第一密封件630包括夹设于极柱沉台620和第二极柱凸台641之间的第五部分630b，第二密封件650包括夹设于极柱沉台620和第二极柱凸台641之间的第六部分650b，第五部分630b包括平行于所述第一表面S1的第一端部631，第六部分650b包括平行于第一表面S1的第二端部651，第一端部631与第二端部651相抵接。这里的第五部分630b即第一密封件630的第二部分630b，第六部分650b即第二密封件650的第四部分650b。
图18A-18D所示仅为示例，不用于限制第一密封件630和第二密封件650的具体结构，在图18A-18D所示实施例的基础上所进行的任意变形都在本发明所要保护的范围中。
本发明的动力电池顶盖采用第一密封件和第二密封件，形成对极柱组件的双密封结构，极大地提高了极柱密封的可靠性；并且第一极柱和第二极柱采用焊接方式连接，在焊接过程中产生的力直接传递给第一密封件和第二密封件，该焊接力与第一密封件和第二密封件的压缩力的方向一致，有助于对第一密封件和第二密封件的压缩，从而进一步增强极柱的密封性。该动力电池顶盖具有良好的密封性、耐压性和耐高温性。
本发明还包括一种动力电池，包括本发明实施例的动力电池顶盖。
图19是本发明一实施例的动力电池的结构示意图。该动力电池1900包括本发明的动力电池顶盖和电池本体1901。该动力电池顶盖可以是前文所述的动力电池顶盖100或1600，其中的电极组件200、600可以作为该动力电池1900的正极，电极组件300、700可以作为该动力电池1900的负极。
在一些实施例中，本发明的动力电池是锂离子电池。
由于采用本发明的动力电池顶盖，动力电池1900也具有良好的密封性、耐压性和耐高温性，安全可靠。
本申请使用了特定词语来描述本申请的实施例。如“一个实施例”、“一实施例”、和/或“一些实施例”意指与本申请至少一个实施例相关的某一特征、结构或特点。因此，应强调并注意的是，本说明书中在不同位置两次或多次提及的“一实施例”或“一个实施例”或“一替代性实施例”并不一定是指同一实施例。此外，本申请的一个或多个实施例中的某些特征、结构或特点可以进行适当的组合。
虽然本发明已参照当前的具体实施例来描述，但是本技术领域中的普通技术人员应当认识到，以上的实施例仅是用来说明本发明，在没有脱离本发明精神的情况下还可作出各种等效的变化或替换，因此，只要在本发明的实质精神范围内对上述实施例的变化、变型都将落在本申请的权利要求书的范围内。

Claims (21)

  1. 一种动力电池顶盖，其特征在于，包括：
    顶盖片，包括极柱沉台和极柱孔，所述极柱沉台凹陷地设置在所述顶盖片的第一表面中，所述极柱孔位于所述极柱沉台中；
    第一极柱，包括第一极柱凸台，所述第一极柱凸台穿过所述极柱孔；
    第一固定件，包括第一固定件通孔，所述第一极柱部分地设置于所述第一固定件通孔中，所述第一固定件部分地设置于所述极柱沉台中；
    第二极柱，包括第二极柱凸台，所述第二极柱凸台包括凸台孔，所述第一极柱凸台伸入所述凸台孔，所述第一极柱与所述第二极柱电性接触；
    第一密封件，设置在所述极柱沉台内，并与所述第一极柱接触；以及
    绝缘板，包括绝缘板通孔，设于所述顶盖片的第二表面一侧，所述第二表面是所述第一表面的反面，所述第二极柱凸台穿过所述绝缘板通孔与所述第一极柱电性接触。
  2. 如权利要求1所述的动力电池顶盖，其特征在于，所述第一极柱凸台和所述凸台孔通过焊接连接。
  3. 如权利要求1所述的动力电池顶盖，其特征在于，所述第一极柱还包括凹槽，所述凹槽位于所述第一极柱的腰部；所述第一固定件还包括凸出部，所述凸出部位于所述第一固定件的腰部，所述凸出部嵌入所述凹槽中。
  4. 如权利要求3所述的动力电池顶盖，其特征在于，所述第一极柱和所述第一固定件是一体注塑成型或装配连接。
  5. 如权利要求1或3所述的动力电池顶盖，其特征在于，所述第一极柱是导电材料，所述第一极柱的材料和所述第一固定件的材料不同。
  6. 如权利要求1所述的动力电池顶盖，其特征在于，所述第一密封件为环状结构，所述第一密封件的环状面积小于所述第一固定件通孔的孔面积。
  7. 如权利要求1所述的动力电池顶盖，其特征在于，所述第一密封件包括第一部分和第二部分，所述第一部分夹设于所述第一极柱和所述极柱沉台之间，所述第二部分设于所述极柱孔中，所述第二部分夹设于所述极柱沉台和所述第二极柱凸台之间。
  8. 如权利要求7所述的动力电池顶盖，其特征在于，所述第一部分和所述第 二部分在其纵截面上呈L型。
  9. 如权利要求1所述的动力电池顶盖，其特征在于，还包括：
    第二密封件，至少部分夹设在所述第二极柱和所述第二表面之间。
  10. 如权利要求9所述的动力电池顶盖，其特征在于，所述第二密封件为环状结构，所述第二密封件的环状面积小于所述绝缘板通孔的孔面积。
  11. 如权利要求9所述的动力电池顶盖，其特征在于，所述第二密封件包括第三部分和第四部分，所述第三部分夹设于所述第二极柱和所述第二表面之间，所述第四部分设于所述极柱孔中，所述第四部分夹设于所述极柱沉台和所述第二极柱凸台之间。
  12. 如权利要求11所述的动力电池顶盖，其特征在于，所述第三部分和所述第四部分在其纵截面上呈L型。
  13. 如权利要求9所述的动力电池顶盖，其特征在于，所述第一密封件和所述第二密封件相互接触。
  14. 如权利要求13所述的动力电池顶盖，其特征在于，所述第一密封件包括夹设于所述极柱沉台和所述第二极柱凸台之间的第五部分，所述第二密封件包括夹设于所述极柱沉台和所述第二极柱凸台之间的第六部分，所述第五部分包括平行于所述第一表面的第一端部，所述第六部分包括平行于所述第一表面的第二端部，所述第一端部与所述第二端部相抵接。
  15. 如权利要求9-14任一项所述的动力电池顶盖，其特征在于，所述第一密封件和所述第二密封件是一体成型的。
  16. 如权利要求1所述的动力电池顶盖，其特征在于，当所述第一极柱和所述第二极柱配合作为动力电池的正极时，所述第一固定件为导电材料或绝缘材料。
  17. 如权利要求1所述的动力电池顶盖，其特征在于，当所述第一极柱和所述第二极柱配合作为动力电池的负极时，所述第一固定件为绝缘材料。
  18. 如权利要求1所述的动力电池顶盖，其特征在于，所述顶盖片包括对称分布的两个所述极柱沉台，每个所述极柱沉台中包括一个所述极柱孔，两套所述第一极柱、第一固定件、第二极柱、第一密封件分别对应于所述两个所述极柱沉台和所述极柱孔而设置，其中，一套所述第一极柱和所述第二极柱作为动力电池的正极，另一套所述第一极柱和所述第二极柱作为所述动力电池的负极。
  19. 如权利要求1所述的动力电池顶盖，其特征在于，所述第二极柱凸台的内部为空心。
  20. 如权利要求1所述的动力电池顶盖，其特征在于，所述第一极柱凸台的外形为多边形、圆形、椭圆形或跑道形中的一种，所述凸台孔的形状为多边形、圆形、椭圆形或跑道形中的一种，所述第一极柱凸台和所述凸台孔的形状相适配。
  21. 一种动力电池，其特征在于，包括如权利要求1-20所述的动力电池顶盖。
PCT/CN2020/139014 2019-12-24 2020-12-24 动力电池顶盖和动力电池 Ceased WO2021129739A1 (zh)

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