CN116565439A

CN116565439A - Battery pack and electric equipment

Info

Publication number: CN116565439A
Application number: CN202310770024.4A
Authority: CN
Inventors: 伍凯; 张惟栋; 喻律师
Original assignee: Xiamen Xinnengda Technology Co Ltd
Current assignee: Xiamen Xinnengda Technology Co Ltd
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2023-08-08

Abstract

The application discloses battery package and consumer, battery package include casing and a plurality of electric core, and the casing includes baffle and bottom plate. The baffle extends along the first direction, and the baffle is equipped with first cavity. The bottom plate is connected with the baffle, is formed with a plurality of installation spaces between bottom plate and the baffle, and a plurality of installation spaces are arranged along the second direction, and installation space is located to the electric core, and the second direction is the contained angle with first direction. The bottom plate is equipped with second cavity and third cavity, along first direction, and first cavity, second cavity and third cavity set gradually, and first cavity and second cavity intercommunication are configured to accept first coolant, are equipped with first thermal-insulated medium in the third cavity. The application is equipped with the third cavity setting of first thermal-insulated medium in the bottom plate, and the third cavity locates one side that the second cavity deviates from first cavity, is favorable to promoting the isolation effect of first coolant and casing external environment, reduces the influence of external environment to first coolant to promote the cooling effect to the electric core.

Description

Battery pack and electric equipment

Technical Field

The application relates to the technical field of energy storage, in particular to a battery pack and electric equipment.

Background

In the use of the battery pack, the battery cell of the battery pack can generate heat, and the battery cell needs to be cooled to improve the use reliability of the battery pack.

At present, some battery packs are cooled by arranging a cooling part in the battery pack, wherein the cooling part is used for accommodating a coolant, and the coolant absorbs heat generated by the battery cells, so that the battery cells are cooled. However, the coolant is easily heated by the external environment, and the cooling effect of the coolant on the battery cells is reduced, so that improvement is demanded.

Disclosure of Invention

In view of this, this application provides a battery package, is favorable to reducing the influence of external environment to the coolant, promotes the cooling effect to the electric core.

Some embodiments herein provide a battery pack including a housing including a separator and a bottom plate, and a plurality of cells. The baffle extends along the first direction, and the baffle is equipped with first cavity. The bottom plate is connected with the baffle, is formed with a plurality of installation spaces between bottom plate and the baffle, and a plurality of installation spaces are arranged along the second direction, and the installation space is located to the electric core, and the second direction is the contained angle setting with first direction. The bottom plate is equipped with second cavity and third cavity, along first direction, and first cavity, second cavity and third cavity set gradually, and first cavity and second cavity intercommunication are configured to accept first coolant, are equipped with first thermal-insulated medium in the third cavity.

In the above embodiment, the third cavity provided with the first heat insulation medium is arranged on the bottom plate, and the third cavity is arranged on one side of the second cavity away from the first cavity, so that the isolation effect of the first coolant and the external environment of the shell is improved, the influence of the external environment on the first coolant is reduced, and the cooling effect on the battery cell is improved. And the first cavity for accommodating the first coolant is further formed in the partition plate, so that the part, close to the bottom plate, of the battery cell in the first direction is cooled, and the problem that the heat dissipation of the bottom plate is reduced by the first heat insulation medium is solved. In addition, the first coolant is arranged in the cavity in the partition plate and the bottom plate, so that heat dissipation of the surfaces, connected with the partition plate and the bottom plate, of the battery cell is facilitated, integration of a cooling system and the shell is facilitated, a cooling device for accommodating the first coolant is omitted, and the space available in the battery pack is further facilitated to be increased.

In some embodiments, the partition includes a first cooling portion provided with a first cavity and a thermal insulation portion located on a side of the first cooling portion facing away from the floor in the first direction.

In the above embodiment, the first cooling portion of the partition plate is used for cooling the battery cells, the heat insulation portion is used for insulating the battery cells in the two adjacent installation spaces, the heat insulation portion limits the change of heat in the corresponding installation space, the efficiency of heat transferred to the adjacent installation space is reduced, the mutual influence of the battery cells in the two installation spaces is reduced, and therefore the safety of the battery pack is improved.

In some embodiments, the insulation is provided with a fourth cavity in which the second insulation medium is disposed.

In the above embodiment, the second heat insulating medium is beneficial to improving the heat insulating effect of the heat insulating part, and is beneficial to further reducing the mutual influence of the electric cores in the two installation spaces, so that the safety of the battery pack is beneficial to improving.

In some embodiments, the number of fourth cavities is a plurality, the plurality of fourth cavities being arranged along the first direction.

In the above embodiment, the plurality of fourth cavities make the partition plate have a partition structure for partitioning the fourth cavities, and the partition structure is favorable to improving the structural strength of the partition plate, so as to improve the shock resistance of the battery pack.

In some embodiments, the separator further includes a second cooling portion located on a side of the insulating portion facing away from the first cooling portion in the first direction.

In the above embodiment, the second cooling portion is beneficial to reducing the temperature of the side of the battery cell away from the bottom plate along the first direction, so as to improve the safety of the battery pack.

In some embodiments, the second cooling portion is provided with a fifth cavity in which the second coolant is provided.

In the above embodiment, the second coolant is advantageous in enhancing the cooling effect of the second cooling portion.

In some embodiments, the second cooling portion is provided with a first opening, and the first opening communicates the fifth cavity with one of the installation spaces. The housing further comprises a structural member connected to the second cooling portion and adapted to close the first opening, the structural member being configured to open the first opening when the temperature of the structural member reaches a temperature threshold or the air pressure of the installation space reaches an air pressure threshold.

In the above embodiment, when the temperature of the structural member reaches the temperature threshold, the structural member melts to cause the first opening to be opened, or when the air pressure of the installation space reaches the air pressure threshold, the structural member is flushed to cause the first opening to be opened. The second coolant in the fifth cavity enters the installation space through the first opening to cool the high-temperature battery cell, and the temperature in the battery cell and the installation space is reduced, so that the runaway time of the battery pack is prolonged or the runaway of the battery pack is restrained, and the safety performance of the battery pack is improved.

In some embodiments, the structural member has a melting temperature less than the melting temperature of the separator.

In the above embodiment, the melting temperature of the structural member is smaller than that of the separator, so that the structural member is melted before the separator, and the structural member can be opened in time to cool the high-temperature battery cell in time by using the first coolant or the second coolant, and the temperature in the battery cell and the installation space is reduced.

In some embodiments, the partition is provided with a first opening, which communicates the first cavity with one of the installation spaces. The housing further includes a structural member connected to the partition and configured to close the first opening, the structural member being configured to open the first opening when a temperature of the structural member reaches a temperature threshold or an air pressure of the installation space reaches an air pressure threshold.

In the above embodiment, when the temperature of the structural member reaches the temperature threshold, the structural member melts to cause the first opening to be opened, or when the air pressure of the installation space reaches the air pressure threshold, the structural member is flushed to cause the first opening to be opened. The first coolant in the first cavity enters the installation space through the first opening to cool the high-temperature battery cell, and the temperature in the battery cell and the installation space is reduced, so that the runaway time of the battery pack is prolonged or the runaway of the battery pack is restrained, and the safety performance of the battery pack is improved.

In some embodiments, an adhesive is provided between the cell and the separator, and the minimum distance between the first cavity and the end of the separator facing away from the base plate in the first direction is L ₁ The minimum distance between the adhesive and the end of the partition plate facing away from the bottom plate is L ₂ Satisfy L ₂ ≤L ₁ 。

In the above embodiment, the adhesive member facilitates heat transfer between the battery cell and the first coolant, when L is satisfied ₂ ≤L ₁ And in addition, the application range of the bonding piece to the first coolant and the battery cell is also favorably improved, so that the uniformity of the temperature of the battery pack is improved.

In some embodiments, in the first direction, the height of the spacer is H ₁ The bonding piece is contacted with the bottom plate, and the minimum height of the bonding piece is H ₂ Satisfy 0.5 XH ₁ ≤H ₂ 。

In the above embodiment, the ratio of 0.5 XH is satisfied ₁ ≤H ₂ Under the condition, the battery pack is beneficial to reducing the movement of the battery cell and the consumption of the bonding piece, and the consumption of the bonding piece plays a role in reducing the weight and saving the cost of the whole battery pack.

In some embodiments, the separator has oppositely disposed first and second walls in the second direction. The distance between the first wall and the second wall in the second direction gradually increases along the first direction, and the first direction is the direction that one side of the partition board away from the bottom plate faces the bottom plate.

In the above embodiment, the first wall and the second wall have guiding function, which is beneficial to smoothly entering the installation space when the battery cell is installed.

In some embodiments, the number of spacers is a plurality, and the number of spacers is a plurality, the plurality of spacers being spaced apart along the second direction. The battery pack also comprises a current collecting mechanism, wherein the current collecting mechanism is provided with an inlet and an outlet, and the current collecting mechanism is communicated with the first cavities of the plurality of clapboards.

In the above embodiment, the current collecting mechanism realizes the circulation of the first coolant, and the first coolant circulation is beneficial to cooling the first coolant outside, so that the heat exchange between the first coolant and the battery pack is realized, and the first coolant maintains good cooling performance in the battery pack, thereby being beneficial to improving the cooling effect on the battery pack.

In some embodiments, the housing further comprises a mounting mechanism, and in the second direction, a plurality of spacers are disposed on opposite sides of the mounting mechanism, and the current collecting mechanism further comprises a first channel and a second channel. Along the third direction, the first passageway is located one side of baffle, and the second direction is two liang perpendicular with first direction and second direction, and first passageway includes first part and the second part with a plurality of first cavitys intercommunication, along the second direction, and first part is located one side of installation mechanism, and the second part is located the opposite side of installation mechanism, and first part is equipped with the import, and the second part is equipped with the export. Along the third direction, the second channel is located the opposite side of baffle, and the second channel includes the third part and the fourth part that communicate with a plurality of first cavitys, and the third part is located the one side of installation mechanism in the second direction, and the fourth part is located the opposite side of installation mechanism in the second direction, and third part and fourth part pipeline intercommunication.

In the above-described embodiment, in the case where the mounting mechanism is provided, the provision of the first portion, the second portion, the third portion, and the fourth portion is advantageous in achieving circulation of the first coolant.

In some embodiments, the housing further comprises a side plate connected to the bottom plate and enclosing an accommodating space, and the partition is located in the accommodating space and spaces the accommodating space out of the plurality of mounting spaces.

In the above embodiment, the side plate is beneficial to packaging a plurality of battery cells, and reduces the influence of external environment on the battery cells.

In addition, the embodiment of the application also provides electric equipment, which comprises the battery pack in any embodiment.

In the above embodiment, the cooling effect of the battery cell is improved, which is favorable for improving the safety of the battery pack, and further is favorable for improving the reliability and service life of the electric equipment.

The battery pack in this application includes casing and a plurality of electric core, and the casing includes baffle and bottom plate. The baffle extends along the first direction, and the baffle is equipped with first cavity. The bottom plate is connected with the baffle, is formed with a plurality of installation spaces between bottom plate and the baffle, and a plurality of installation spaces are arranged along the second direction, and installation space is located to the electric core, and the second direction is the contained angle with first direction. The bottom plate is equipped with second cavity and third cavity, along first direction, and first cavity, second cavity and third cavity set gradually, and first cavity and second cavity intercommunication are configured to accept first coolant, are equipped with first thermal-insulated medium in the third cavity. The third cavity that is equipped with first thermal-insulated medium sets up in the bottom plate, and the third cavity locates one side that the second cavity deviates from first cavity, is favorable to promoting the isolation effect of first coolant and casing external environment, reduces the influence of external environment to first coolant to promote the cooling effect to the electric core.

Drawings

Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present disclosure.

Fig. 2 is an exploded view of the battery pack of fig. 1.

Fig. 3 is a schematic structural diagram of a housing and a current collecting mechanism according to an embodiment of the present disclosure.

Fig. 4 is an exploded view of the housing and current collecting mechanism of fig. 3.

Fig. 5 is a schematic structural view of a partition board and a bottom board according to an embodiment of the present application.

Fig. 6 is a side view of a baffle and a base plate provided in an embodiment of the present application.

Fig. 7 is a side view of a separator provided in an embodiment of the present application with a first coolant, a second coolant, and a second heat insulation medium disposed therein, and a base plate with the first coolant and the first heat insulation medium disposed therein.

Fig. 8 is a schematic structural diagram of a housing and a current collecting mechanism according to an embodiment of the present disclosure.

Fig. 9 is a schematic structural diagram of a partition board and a bottom board according to another embodiment of the present application.

Fig. 10 is a schematic structural diagram of a partition board and a bottom board according to another embodiment of the present application.

Fig. 11 is a cross-sectional view of a battery pack according to an embodiment of the present application.

Fig. 12 is a schematic structural diagram of a partition board and a bottom board according to another embodiment of the present disclosure.

Fig. 13 is a schematic diagram of an electric device according to an embodiment of the present application.

Description of the main reference signs

Battery pack 100

Housing 10

Partition 11

First cooling unit 111

Thermal insulation portion 112

Second cooling portion 113

First opening 1131

Second opening 1132

First cavity 111a

Fourth cavity 112a

Fifth cavity 113a

First wall 11a

A second wall 11b

Bottom plate 12

Second cavity 12a

Third cavity 12b

Installation space 13

Structural member 14

Mounting mechanism 15

Support portion 151

First baffle 152

Second baffle 153

Side plate 16

First side wall 161

Second sidewall 162

Third sidewall 163

Fourth sidewall 164

Top plate 17

Accommodation space 101

Cell 20

First coolant 30

First heat insulating medium 40a

Second insulating medium 40b

Second coolant 50

Adhesive member 60

Current collecting mechanism 70

First channel 71

First portion 711

Inlet 7111

Second portion 712

Outlet 7121

Second channel 72

Third portion 721

Fourth portion 722

Management module 80

Connecting piece 90

Device body 200

Electric equipment 1000

First direction X

Second direction Y

Third direction Z

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments.

It is noted that when one component is considered to be "connected" to another component, it may be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," and the like are used herein for illustrative purposes only.

The term "plurality" as used herein refers to two or more than two, unless specifically stated otherwise.

The terms "first," "second," and the like, are used merely to distinguish between different objects and should not be construed as indicating or implying a relative importance or number of technical features, a particular order or a primary or secondary relationship indicated.

The term "parallel" is used to describe an ideal state between two components. In an actual production or use state, there may be a state of approximately parallelism between the two components. For example, in connection with numerical descriptions, parallel may refer to an angle between two straight lines ranging between 180++10°, parallel may refer to a dihedral angle between two planes ranging between 180++10°, and parallel may refer to an angle between a straight line and a plane ranging between 180++10°. The two components described as "parallel" may be considered "straight" or "planar" as they are considered "straight" or "planar" in that they are not strictly straight or planar, but may be substantially straight or planar in that they extend in a macroscopic manner.

It should be noted that when a certain parameter is greater than, equal to, or less than a certain endpoint, it should be understood that the endpoint allows a tolerance of ±10%, for example, a to B is greater than 10, and it should be understood that a case where a to B is greater than 9 is included, and a case where a to B is greater than 11 is also included.

It is to be appreciated that the dimensions and thicknesses of the various components shown in the figures are presented for better understanding and for easier description, and that the present application is not limited to the dimensions and thicknesses shown in the figures. The thickness of layers, films, panels, regions, etc. in the drawings may be exaggerated for clarity. Elements not relevant to the description are omitted from the details of the present description for clarity of the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The application discloses battery package includes casing and a plurality of electric core, and the casing includes baffle and bottom plate. The baffle extends along the first direction, and the baffle is equipped with first cavity. The bottom plate is connected with the baffle, is formed with a plurality of installation spaces between bottom plate and the baffle, and a plurality of installation spaces are arranged along the second direction, and installation space is located to the electric core, and the second direction is the contained angle with first direction. The bottom plate is equipped with second cavity and third cavity, along first direction, and first cavity, second cavity and third cavity set gradually, and first cavity and second cavity intercommunication are configured to accept first coolant, are equipped with first thermal-insulated medium in the third cavity.

Above-mentioned third cavity that is equipped with first thermal-insulated medium sets up in the bottom plate, and the third cavity locates one side that the second cavity deviates from first cavity, is favorable to promoting the isolation effect of first coolant and casing external environment, reduces the influence of external environment to first coolant to promote the cooling effect to the electric core. And the first cavity for accommodating the first coolant is further formed in the partition plate, so that the part, close to the bottom plate, of the battery cell in the first direction is cooled, and the problem that the heat dissipation of the bottom plate is reduced by the first heat insulation medium is solved. In addition, the first coolant is arranged in the cavity in the partition plate and the bottom plate, so that heat dissipation of the surfaces, connected with the partition plate and the bottom plate, of the battery cell is facilitated, integration of a cooling system and the shell is facilitated, a cooling device for accommodating the first coolant is omitted, and the space available in the battery pack is further facilitated to be increased.

Some embodiments of the present application will be described below with reference to the accompanying drawings. The embodiments described below and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1 and 2, a battery pack 100 is provided in the embodiment of the present application, and includes a housing 10 and a plurality of battery cells 20, wherein the plurality of battery cells 20 are disposed in the housing 10.

In some embodiments, referring to fig. 2 and 3, the housing 10 includes a partition 11 and a bottom plate 12, the partition 11 extends along a first direction X, the bottom plate 12 is connected to the partition 11, a plurality of mounting spaces 13 are formed between the bottom plate 12 and the partition 11, the plurality of mounting spaces 13 are arranged along a second direction Y, and the battery cells 20 are disposed in the mounting spaces 13, and the second direction Y is disposed at an angle with the first direction X. The partition 11 plays a role in isolating different battery cells 20, so that the mutual influence of the battery cells 20 in two adjacent installation spaces 13 is reduced, and the safety of the battery pack 100 is improved.

In some embodiments, referring to fig. 2 and 3, the number of the spacers 11 may be one or more, and when the number of the spacers 11 is more, the spacers 11 are arranged at intervals along the second direction Y.

In some embodiments, referring to fig. 4, the number of the bottom plates 12 is plural, the number of the partition plates 11 is identical to that of the bottom plates 12, each bottom plate 12 is connected with one partition plate 11, and the bottom plates 12 and the partition plates 11 are connected by extrusion, casting or injection molding, so as to facilitate the installation of the whole shell 10.

In other embodiments, the number of the bottom plates 12 is one, the number of the partition plates 11 is plural, and the plurality of partition plates 11 are connected to the bottom plates 12.

In some embodiments, the bottom plate 12 and the partition plate 11 are made of aluminum or aluminum alloy, which is beneficial to reducing heat transfer and weight reduction, reducing the risk of melting the partition plate 11 and the bottom plate 12 due to high temperature, and integrally forming the bottom plate 12 and the partition plate 11 by extruding aluminum.

In some embodiments, referring to fig. 2, at least one battery cell 20 is disposed in each installation space 13, and the battery cell 20 may be a square battery cell 20, a cylindrical battery cell 20 or a soft package battery cell 20, which is not limited herein.

In some embodiments, the angle between the first direction X and the second direction Y is greater than or equal to 60 ° and less than or equal to 90 °. Illustratively, the angle between the first direction X and the second direction Y may be 65 °, 70 °, 75 °, 80 °, 85 °.

In some embodiments, referring to fig. 3, the housing 10 further includes a side plate 16, where the side plate 16 is connected to the bottom plate 12 and encloses a receiving space 101, and the partition 11 is located in the receiving space 101 and separates the receiving space 101 from a plurality of mounting spaces 13.

In some embodiments, referring to fig. 3 and 4, the side plate 16 includes a first side wall 161, a second side wall 162, a third side wall 163, and a fourth side wall 164 that are sequentially connected. The first side wall 161 and the third side wall 163 are disposed opposite to each other along the second direction Y, and the second side wall 162 and the fourth side wall 164 are disposed opposite to each other along the third direction Z, which is perpendicular to the first direction X and the second direction Y.

In some embodiments, referring to fig. 2 to 4, the housing 10 further includes a top plate 17, and the top plate 17 is connected to each of the first side wall 161, the second side wall 162, the third side wall 163, and the fourth side wall 164. Along the first direction X, the top plate 17 and the bottom plate 12 are arranged opposite to each other, so that the top plate 17 covers the accommodating space 101, thereby being beneficial to improving the protection effect on the battery cell 20 and reducing the influence of external dust and water vapor on the battery cell 20.

In some embodiments, referring to fig. 3 and 4, the housing 10 further includes a mounting mechanism 15, the mounting mechanism 15 being coupled to the base plate 12, the mounting mechanism 15 being configured for mounting the management module 80 within the battery pack 100.

In some embodiments, referring to fig. 2 to 4, the mounting mechanism 15 includes a support portion 151, a first baffle 152, and a second baffle 153, the first baffle 152 and the second baffle 153 are arranged along the second direction Y, and the support portion 151 is disposed between the first baffle 152 and the second baffle 153. The management module 80 may be installed on the supporting portion 151, and the first baffle 152 and the second baffle 153 are used for isolating the management module 80 from the battery cell 20, so as to reduce the influence of heat generated by the battery cell 20 on the management module 80.

In some embodiments, the management module 80 is electrically connected to the plurality of battery cells 20, where the management module 80 includes a high-voltage box, a circuit board, or an adapter board, and the management module 80 can collect parameters such as voltage, temperature, current, and voltage of the battery cells 20, so as to monitor and manage the operation state of the battery pack 100, which is beneficial to improving the safety of the battery pack 100.

In some embodiments, referring to fig. 1 and 2, the battery pack 100 further includes a connecting member 90, where the connecting member 90 is electrically connected to the management module 80, and the connecting member 90 is disposed through the housing 10 and at least partially exposed to the housing 10, so that the battery pack 100 can be electrically connected to an external circuit.

In some embodiments, referring to fig. 5 to 7, the partition 11 is provided with a first cavity 111a, and the bottom plate 12 is provided with a second cavity 12a and a third cavity 12b. The first cavity 111a, the second cavity 12a, and the third cavity 12b are disposed in order along the first direction X, and the first cavity 111a communicates with the second cavity 12 a. The first chamber 111a and the second chamber 12a are configured to receive the first coolant 30, and the first heat insulating medium 40a is provided in the third chamber 12b.

As can be appreciated, the heat of the battery cells 20 disposed in the mounting space 13 is transferred to the bottom plate 12, the bottom plate 12 transfers the heat to the first coolant 30 in the second cavity 12a, and the first coolant 30 absorbs the transferred heat, thereby cooling the battery cells 20. When the battery pack 100 is in an external environment with a high temperature, heat of the external environment is easily transferred to the first coolant 30 in the second cavity 12a through the bottom plate 12, and the cooling capacity of the battery cell 20 is reduced when the temperature of the first coolant 30 increases.

In this application, be equipped with first thermal-insulated medium 40 a's third cavity 12b and set up in bottom plate 12, and third cavity 12b locates one side that second cavity 12a deviates from first cavity 111a, is favorable to promoting the isolation effect of first coolant 30 and casing 10 external environment, reduces the influence of external environment to first coolant 30 to promote the cooling effect to electric core 20. The partition 11 is further provided with a first cavity 111a for accommodating the first coolant 30, which cools the portion of the battery cell 20 adjacent to the bottom plate 12 in the first direction X, so that the problem that the first heat insulating medium 40a reduces heat dissipation of the bottom plate 12 can be solved. In addition, the first coolant 30 is disposed in the cavities in the partition 11 and the bottom plate 12, which is favorable for heat dissipation of the surfaces of the battery cells 20, which are connected with the partition 11 and the bottom plate 12, is favorable for integration of the cooling system and the housing 10, and omits an additional cooling device for accommodating the first coolant 30, thereby further being favorable for improving the available space inside the battery pack 100.

In some embodiments, the first coolant 30 may be a cooling fluid. In some embodiments, the first coolant 30 may be water. In some embodiments, the first coolant 30 may be a phase change material that changes from a liquid state to a vapor state upon absorbing heat, which is not particularly limited herein.

In some embodiments, the first insulating medium 40a may be foam, asbestos, or air, among others, that can reduce the efficiency of heat transfer.

In some embodiments, the second and third cavities 12a and 12b may be provided in plurality, and the first cavity 111a may communicate with any one of the second cavities 12 a. The plurality of second chambers 12a may or may not be in communication with each other. The plurality of third chambers 12b may or may not be in communication. The plurality of second cavities 12a and the plurality of third cavities 12b enable the bottom plate 12 to be provided with a separation structure for separating the plurality of second cavities 12a and the plurality of third cavities 12b, and the separation structure is beneficial to improving the structural strength of the bottom plate 12, so that the shock resistance of the battery pack 100 is improved.

In some embodiments, referring to fig. 7 and 8, the partition 11 includes a first cooling portion 111 and a heat insulation portion 112, the first cooling portion 111 is provided with a first cavity 111a, and the heat insulation portion 112 is located on a side of the first cooling portion 111 facing away from the bottom plate 12 along the first direction X. The first cooling part 111 of the partition 11 is used for cooling the battery cells 20, and the heat insulating part 112 is used for insulating the battery cells 20 in the adjacent two mounting spaces 13.

It will be appreciated that when the battery cells 20 in one installation space 13 are abnormal, the battery cells 20 change the heat of the surrounding environment, the heat insulation part 112 limits the change of the heat to the corresponding installation space 13, and reduces the efficiency of heat transferred to the adjacent installation space 13, which is beneficial to further reducing the interaction of the battery cells 20 in the two installation spaces 13, thereby being beneficial to improving the safety of the battery pack 100.

In some embodiments, referring to fig. 6 and 7, the heat insulation part 112 is provided with a fourth cavity 112a, and a second heat insulation medium 40b is disposed in the fourth cavity 112a to improve heat insulation effect, so as to further reduce interaction of the battery cells 20 in the two installation spaces 13, thereby improving safety of the battery pack 100.

In some embodiments, the second heat insulating medium 40b may be a material that can reduce the heat transfer efficiency, such as foam, asbestos, or air, and the material of the second heat insulating medium 40b may be the same as or different from that of the first heat insulating medium 40a, which is not specifically limited herein.

In other embodiments, the insulation 112 itself comprises an insulating material such as fiberglass to promote the insulating effect of the baffle 11.

In some embodiments, referring to fig. 6 and 7, the number of fourth cavities 112a is plural, and the plural fourth cavities 112a are arranged along the first direction X. The plurality of fourth cavities 112a provide the partition structure for partitioning the fourth cavities 112a in the partition 11, which is beneficial to improving the structural strength of the partition 11 and further improving the shock resistance of the battery pack 100.

In some embodiments, referring to fig. 6 and 7, the partition 11 further includes a second cooling portion 113, and along the first direction X, the second cooling portion 113 is located on a side of the heat insulation portion 112 facing away from the first cooling portion 111. The second cooling part 113 is advantageous in reducing the temperature of a portion of the battery cell 20 facing away from the bottom plate 12 in the first direction X, thereby improving the safety of the battery pack 100.

In some embodiments, referring to fig. 6 and 7, the second cooling portion 113 is provided with a fifth cavity 113a, and the second coolant 50 is disposed in the fifth cavity 113a, so that the second coolant 50 is beneficial to enhancing the cooling effect of the second cooling portion 113.

In some embodiments, the fifth cavity 113a may be in communication with the first cavity 111a, where the first coolant 30 and the second coolant 50 are the same substance; the fifth chamber 113a may not communicate with the first chamber 111 a.

In some embodiments, the second coolant 50 may be a cooling fluid, and in some embodiments, the second coolant 50 may be water. In some embodiments, the second coolant 50 may be a phase change material that changes from a liquid state to a vapor state upon absorbing heat. The material of the second coolant 50 and the first coolant 30 may be the same or different, and are not particularly limited herein.

In some embodiments, referring to fig. 9, the second cooling portion 113 is provided with a first opening 1131, and the first opening 1131 communicates with the fifth cavity 113a and one of the installation spaces 13. The housing 10 further comprises a structural member 14, the structural member 14 being connected to the second cooling portion 113 and being adapted to cover the first opening 1131, the structural member 14 being configured to open the first opening 1131 when the temperature of the structural member 14 reaches a temperature threshold or the air pressure of the installation space 13 reaches an air pressure threshold.

In other embodiments, referring to fig. 10, the partition 11 is provided with a first opening 1131, and the first opening 1131 communicates with the first cavity 111a and one of the installation spaces 13. The housing 10 further comprises a structural member 14, the structural member 14 being connected to the partition 11 and being adapted to cover the first opening 1131, the structural member 14 being configured to open the first opening 1131 when the temperature of the structural member 14 reaches a temperature threshold or the air pressure of the installation space 13 reaches an air pressure threshold.

It will be appreciated that when the battery cell 20 enters an abnormal condition, the temperature of the battery cell 20 increases sharply, which results in a sharp increase in the temperature in the installation space 13, and in some extreme cases, the battery cell 20 also leaks high-temperature gas, which results in an increase in the air pressure in the installation space 13. When the temperature of the structural member 14 reaches a temperature threshold, the structural member 14 melts to cause the first opening 1131 to be opened, or when the air pressure of the installation space 13 reaches an air pressure threshold, the structural member 14 is flushed to cause the first opening 1131 to be opened. The first coolant 30 in the first cavity 111a or the second coolant 50 in the fifth cavity 113a enters the installation space 13 through the first opening 1131 to cool the high-temperature battery cell 20 and reduce the temperature in the battery cell 20 and the installation space 13, which is beneficial to prolonging the runaway time of the battery pack 100 or inhibiting the runaway of the battery pack 100, and further is beneficial to improving the safety performance of the battery pack 100.

It should be noted that the structure 14 being configured to open the first opening 1131 when the temperature of the structure 14 reaches the temperature threshold may be understood that the structure 14 has already begun to melt before the temperature reaches the temperature threshold until the structure 14 melts until the first opening 1131 is opened when the temperature of the structure 14 reaches the temperature threshold. It is also understood that the structure 14 being configured to open the first opening 1131 when the temperature of the structure 14 reaches the temperature threshold may be that the structure 14 begins to melt when the temperature of the structure 14 reaches the temperature threshold, and the structure 14 melts until the first opening 1131 is opened after a duration, which may or may not be the duration in which the temperature of the structure 14 continues to rise.

The understanding that the structural member 14 is configured to open the first opening 1131 when the air pressure of the installation space 13 reaches the air pressure threshold may refer to the understanding that the structural member 14 is configured to open the first opening 1131 when the temperature of the structural member 14 reaches the temperature threshold, which is not described herein.

In some embodiments, the temperature threshold is between 150 ℃ and 300 ℃.

In some embodiments, the material of the structural member 14 is one of polytetrafluoroethylene, polyetheretherketone, polyetherimide.

In some embodiments, the structural member 14 is in the form of a sheet or film.

In some embodiments, the melting temperature of the structural member 14 is less than the melting temperature of the separator 11, so that the structural member 14 melts before the separator 11, which is advantageous for enabling the structural member 14 to timely open the first opening 1131, thereby enabling the first coolant 30 or the second coolant 50 to timely cool the high-temperature battery cell 20 and reducing the temperature in the battery cell 20 and the installation space 13.

In some embodiments, referring to fig. 11, the first opening 1131 is separated from the cell 20 when viewed along the second direction Y, which is advantageous in reducing the risk of the cell 20 blocking the first coolant 30 or the second coolant 50 from flowing out.

In some embodiments, referring to fig. 11, in the first direction X, a minimum distance between the first opening 1131 and the bottom plate 12 is greater than a maximum distance between an end of the battery cell 20 facing away from the bottom plate 12 and the bottom plate 12, such that the first opening 1131 is separated from the battery cell 20 as viewed in the second direction Y.

In some embodiments, the first opening 1131 communicates the first cavity 111a with one of the installation spaces 13, and when viewed along the second direction Y, the first opening 1131 overlaps the battery cell 20, which is beneficial to improving the overall contact efficiency of the first coolant 30 and the battery cell 20, and further improving the cooling effect on the battery cell 20.

In some embodiments, referring to fig. 10 and 12, the partition 11 is further provided with a second opening 1132, where the second opening 1132 communicates with the fifth cavity 113a, or the second opening 1132 communicates with the first cavity 111a, and the second opening 1132 is disposed on a side of the partition 11 facing away from the first opening 1131 along the second direction Y. The second opening 1132 is covered by a structure 14, the structure 14 being configured to open the second opening 1132 when the temperature of the structure 14 reaches a temperature threshold or the air pressure of the installation space 13 reaches an air pressure threshold.

The first opening 1131 communicates with one of the two adjacent installation spaces 13, and the second opening 1132 communicates with the other installation space 13, so that the first coolant 30 or the second coolant 50 can flow into each installation space 13, the first coolant 30 or the second coolant 50 can flow into the installation space 13 from multiple directions, and the rate of the first coolant 30 or the second coolant 50 flowing out is improved, and the cooling efficiency of the battery cells 20 and the installation spaces 13 is improved.

In some embodiments, referring to fig. 12, in the second direction Y, the partition 11 has a first wall 11a and a second wall 11b disposed opposite to each other. The distance between the first wall 11a and the second wall 11b in the second direction Y gradually increases along the first direction X, which is the direction in which the side of the partition 11 away from the bottom plate 12 faces the bottom plate 12. The arrangement is such that the first wall 11a and the second wall 11b have a guiding effect, which is advantageous for a smooth entry into the installation space 13 when the battery cell 20 is installed.

In some embodiments, the first wall 11a and the second wall 11b may be obliquely disposed walls, and the first wall 11a and the second wall 11b may also be arc-shaped walls, which are not particularly limited herein.

In some embodiments, in the second direction Y, the fifth cavity 113a overlaps both the first wall 11a and the second wall 11b, which is advantageous for improving the gap between the portion of the separator 11 corresponding to the fifth cavity 113a and the battery cell 20, and is advantageous for only the second coolant 50 to flow out through the first opening 1131 or the second opening 1132.

In some embodiments, referring to fig. 11, an adhesive 60 is disposed between the battery cell 20 and the separator 11, and the adhesive 60 is beneficial to stabilizing the battery cell 20 in the installation space 13 and inhibiting the battery cell 20 from moving or shaking when the battery pack 100 is impacted.

In some embodiments, referring to fig. 11, in the first direction X, the minimum distance between the first cavity 111a and the end of the partition 11 facing away from the bottom plate 12 is L ₁ The minimum distance between the adhesive 60 and the end of the partition 11 facing away from the base plate 12 is L ₂ Satisfy L ₂ ≤L ₁ . The adhesive 60 facilitates heat transfer between the battery cell 20 and the first coolant 30, when L is satisfied ₂ ≤L ₁ In this case, the range of application of the adhesive 60 between the first coolant 30 and the battery cell 20 is also advantageously increased, so as to improve the uniformity of the temperature of the battery pack 100.

In some embodiments, referring to FIG. 11, the height of the spacer 11 along the first direction X is H ₁ The adhesive member 60 contacts the base plate 12, and the minimum height of the adhesive member 60 is H ₂ Satisfy 0.5 XH ₁ ≤H ₂ . Thus, the movement of the battery cell 20 and the consumption of the adhesive member 60 are reduced, and the reduction of the consumption of the adhesive member 60 plays a role in weight reduction and cost saving of the whole battery pack 100.

In some embodiments, referring to fig. 4, the number of the spacers 11 is plural, and the spacers 11 are arranged at intervals along the second direction Y. The battery pack 100 further includes a current collecting mechanism 70, the current collecting mechanism 70 being in communication with the first chamber 111a of each separator 11 or with each second chamber 12a, the current collecting mechanism 70 further being provided with an inlet 7111 and an outlet 7121.

It will be appreciated that the external first coolant 30 enters the manifold 70 through the inlet 7111 and passes through the manifold 70 into the first and second cavities 111a, 12a, and then reenters the manifold 70 and exits through the outlet 7121, completing the circulation of the first coolant 30. The circulation of the first coolant 30 is advantageous in that the first coolant 30 is externally cooled, heat exchange between the first coolant 30 and the battery pack 100 is achieved, and the first coolant 30 maintains good cooling performance in the battery pack 100, thereby facilitating the improvement of the cooling effect on the battery pack 100.

In some embodiments, referring to fig. 4, the housing 10 further includes a mounting mechanism 15, and a plurality of spacers 11 are disposed on opposite sides of the mounting mechanism 15 along the second direction Y, and the current collecting mechanism 70 further includes a first channel 71 and a second channel 72. In the third direction Z, the first passage 71 is located at one side of the partition 11, and the first passage 71 includes a first portion 711 and a second portion 712 communicating with the plurality of first cavities 111 a. In the second direction Y, the first part 711 is located on one side of the mounting means 15 and the second part 712 is located on the side of the mounting means 15 facing away from the first part 711, the first part 711 being provided with an inlet 7111 and the second part 712 being provided with an outlet 7121. The second channel 72 is located on the side of the partition 11 facing away from the first channel 71 in the third direction Z, the second channel 72 comprises a third portion 721 and a fourth portion 722 communicating with the plurality of first cavities 111a, the third portion 721 is located on the side of the mounting mechanism 15 in the second direction Y, the fourth portion 722 is located on the side of the mounting mechanism 15 facing away from the third portion 721, and the third portion 721 and the fourth portion 722 are in piping communication. Where the mounting mechanism 15 is provided, the provision of the first portion 711, the second portion 712, the third portion 721, and the fourth portion 722 facilitates the circulation of the first coolant 30.

It will be appreciated that the external first coolant 30 enters the first portion 711 of the first passage 71 through the inlet 7111, enters the first and second cavities 111a, 12a of the mounting mechanism 15 on one side of the second direction Y through the first portion 711, then enters the third portion 721 from the first and second cavities 111a, 12a, then enters the fourth portion 722 through the piping, and enters the first and second cavities 111a, 12a of the mounting mechanism 15 on the other side of the second direction Y from the fourth portion 722, and finally enters the second portion 712 and exits through the outlet 7121, completing the circulation of the first coolant 30.

In other embodiments, the current collecting mechanism 70 may be omitted, and the first coolant 30 is encapsulated in the first cavity 111a without circulating with the first coolant 30 outside the first cavity 111a, where the first coolant 30 may use a phase change material that is converted in liquid and vapor states.

Referring to fig. 13, the present application further includes a powered device 1000, where the powered device 1000 includes the battery pack 100 in any embodiment. The cooling effect in the battery pack 100 is improved, so that the safety of the battery pack 100 is improved, and the reliability of the electric equipment 1000 is improved.

In some embodiments, referring to fig. 13, the powered device 1000 further includes a device body 200, and the battery pack 100 is mounted on the device body 200.

In some embodiments, the powered device 1000 may be an energy storage cabinet, an electric two-wheeled vehicle, an unmanned aerial vehicle, a cleaning robot, a lighting device, or a portable mobile power source, which are not further described herein.

It should be noted that, since the present electrical device 1000 adopts the technical scheme related to any embodiment of the battery pack 100, the present electrical device at least has the beneficial effects brought by the technical scheme related to any embodiment of the battery pack 100, and will not be described in detail herein.

In addition, those of ordinary skill in the art will recognize that the above embodiments are presented for purposes of illustration only and are not intended to be limiting, and that appropriate modifications and variations of the above embodiments are within the scope of the disclosure of the present application.

Claims

1. A battery pack comprising a housing and a plurality of cells, the housing comprising:

the partition plate extends along a first direction and is provided with a first cavity;

the base plate is connected with the partition plate, a plurality of installation spaces are formed between the base plate and the partition plate, the installation spaces are distributed along a second direction, the battery cells are arranged in the installation spaces, and the second direction and the first direction form an included angle;

The bottom plate is provided with a second cavity and a third cavity, the first cavity, the second cavity and the third cavity are sequentially arranged along the first direction, the first cavity is communicated with the second cavity and is configured to accommodate a first coolant, and a first heat insulation medium is arranged in the third cavity.

2. The battery pack according to claim 1, wherein the separator includes a first cooling portion provided with the first cavity and a heat insulating portion located on a side of the first cooling portion facing away from the bottom plate in the first direction.

3. The battery pack of claim 2, wherein the heat insulating portion is provided with a fourth cavity in which a second heat insulating medium is provided.

4. The battery pack of claim 3, wherein the number of fourth cavities is plural, and the plural fourth cavities are arranged along the first direction.

5. The battery pack of claim 2, wherein the separator further comprises a second cooling portion located on a side of the insulating portion facing away from the first cooling portion in the first direction.

6. The battery pack according to claim 5, wherein the second cooling portion is provided with a fifth cavity in which a second coolant is provided.

7. The battery pack according to claim 6, wherein the second cooling portion is provided with a first opening that communicates the fifth cavity with one of the installation spaces;

the housing further includes a structural member connected with the second cooling portion and configured to cover the first opening, the structural member being configured to open the first opening when a temperature of the structural member reaches a temperature threshold or an air pressure of the installation space reaches an air pressure threshold.

8. The battery pack of claim 7, wherein the structural member has a melting temperature less than a melting temperature of the separator.

9. The battery pack according to claim 1, wherein the separator is provided with a first opening that communicates the first cavity with one of the installation spaces;

the housing further includes a structural member connected with the partition and configured to cover the first opening, the structural member being configured to open the first opening when a temperature of the structural member reaches a temperature threshold or an air pressure of the installation space reaches an air pressure threshold.

10. The battery pack of claim 1, wherein an adhesive is disposed between the cells and the separator, and a minimum distance between the first cavity and an end of the separator facing away from the bottom plate in the first direction is L ₁ The minimum distance between the adhesive and the end of the partition plate facing away from the bottom plate is L ₂ Satisfy L ₂ ≤L ₁ 。

11. The battery pack of claim 10, wherein the height of the separator in the first direction is H ₁ The bonding piece is contacted with the bottom plate, and the minimum height of the bonding piece is H ₂ Satisfy 0.5 XH ₁ ≤H ₂ 。

12. The battery pack of claim 1, wherein in the second direction, the separator has oppositely disposed first and second walls;

the distance between the first wall and the second wall in the second direction is gradually increased along the first direction, and the first direction is the direction that one side of the partition plate away from the bottom plate faces the bottom plate.

13. The battery pack according to claim 1, wherein the number of the separators is plural, and the plural separators are arranged at intervals in the second direction;

the battery pack also comprises a current collecting mechanism, wherein the current collecting mechanism is provided with an inlet and an outlet, and the current collecting mechanism is communicated with the first cavities of the plurality of separators.

14. The battery pack of claim 13, wherein the housing further comprises a mounting mechanism, a plurality of the separators being disposed on opposite sides of the mounting mechanism in the second direction, the current collecting mechanism further comprising:

a first channel, along a third direction, the first channel being located at one side of the partition board, the third direction being perpendicular to the first direction and the second direction, the first channel including a first portion and a second portion that are in communication with the plurality of first cavities, the first portion being located at one side of the mounting mechanism, the second portion being located at the other side of the mounting mechanism, the first portion being provided with the inlet, the second portion being provided with the outlet;

the second channel is positioned on the other side of the partition plate along the third direction, the second channel comprises a third part and a fourth part which are communicated with the plurality of first cavities, the third part is positioned on one side of the mounting mechanism along the second direction, the fourth part is positioned on the other side of the mounting mechanism, and the third part is communicated with the fourth part through pipelines.

15. The battery pack according to any one of claims 1 to 14, wherein the case further includes a side plate connected to the bottom plate and enclosing a receiving space, and the partition plate is located in the receiving space and spaces the receiving space apart by a plurality of the installation spaces.

16. A powered device comprising a battery pack as claimed in any one of claims 1 to 15.