WO2023035989A1 - Insulation partition plate assembly, battery module, battery pack, and assembly method for battery module - Google Patents

Abstract

The present application relates to the technical field of energy storage devices, and discloses an insulation partition plate assembly, a battery module, a battery pack, and an assembly method for a battery module. The insulation partition plate assembly comprises an insulation partition plate, first adapters, and second adapters, wherein the insulation partition plate is provided with a row of first through holes and a row of second through holes, which are used for two rows of tabs of a plurality of bare cells arranged in rows to pass therethrough. In this way, the relative positions of the first row of tabs and the first adapters can be determined, the relative positions of the second row of tabs and the second adapters can be determined, and the relative positions of the first row of tabs and the first adapters and the relative positions of the second row of tabs and the second adapters can be determined by means of positioning of the insulation partition plate, so that connection is convenient, thereby simplifying a positioning operation between the bare cell tabs and the adapters and improving the assembly efficiency. The battery module and the battery pack, which have the insulation partition plate assembly stated above, also have the above advantages, and the assembly method for a battery module can improve the assembly efficiency.

Description

Assembly method of insulating separator assembly, battery module, battery pack and battery module technical field

The invention relates to the technical field of energy storage devices, in particular to an insulating separator assembly, a battery module, a battery pack and an assembly method for the battery module.

Background technique

As the main power source of electric vehicles, the power battery is the key to satisfying the long battery life of new energy electric vehicles by efficiently utilizing the limited space and increasing the energy density. The battery modules in most power batteries usually use multiple single cells, shells, and cover plates to form a module. Among them, a typical single battery includes a shell, a bare cell, and a battery top cover, and the bare cell is located in the shell. , the tabs of the bare cell are connected to the electrode terminals of the battery top cover, the bare cell is packaged in the casing through the battery top cover and injected with electrolyte to form a single battery, and then multiple single cells are connected to the battery module The shell, cover plate and other components are assembled to form a module. In this grouping method, the single battery shell occupies a certain volume space and weight, and the two shell surfaces between adjacent single batteries have a functional The shell surface is redundant, resulting in a certain degree of waste of volume space, and it is difficult for the battery module based on this structure to efficiently use the internal space of the shell.

At present, in order to solve the above-mentioned problems, the related art provides a battery module with an integrated casing, which has multiple installation cavities, and multiple bare cells are directly installed in the multiple installation cavities, and are closed by a top cover. The installation cavity realizes the packaging of the bare cell, wherein, each top cover is connected with an adapter, and each tab of the bare cell is respectively connected with the adapter to realize the interconnection of the bare cell. However, during assembly, it is necessary to position and connect the lugs of multiple bare cells to the adapter. The number of positioning times is low, and the efficiency is low. It is also difficult to put multiple bare cells into the shell after being combined. Therefore, this type of battery module Composition assembly efficiency is low.

Contents of the invention

This application aims to solve at least one of the technical problems existing in the prior art. For this reason, the present application proposes an insulating separator assembly, which can facilitate the positioning and connection between the adapter and the tab of the bare cell, and improve assembly efficiency.

The application also proposes a battery module including the insulating separator assembly and an assembly method of the battery module.

The present application also proposes a battery pack having the above-mentioned battery module.

The insulating spacer assembly of the embodiment of the first aspect of the present application is used to connect two columns of tabs of a plurality of bare electric cores in a row, and the insulating spacer assembly includes:

An insulating spacer, the insulating spacer has an opposite top surface and a bottom surface, and the insulating spacer is provided with a row of first through holes corresponding to the tab area of the first row of the bare electric cores, and is connected to the A row of second through holes corresponding to the tab area of the second row of bare cells, the first through hole and the second through hole passing through the top surface and the bottom surface;

There are a plurality of first adapters, which are arranged on the top surface and arranged in a staggered manner with a plurality of the first through holes, the first adapters are connected to the insulating partition, and the first adapters suitable for welding connection with the tabs of the first column;

A plurality of second adapters are arranged on the top surface and arranged in a staggered manner with the second through holes, the second adapters are connected to the insulating partition, and the second adapters are suitable for For soldering connection with the tabs of the second row.

The insulating spacer assembly of the embodiment of the first aspect of the present application has at least the following beneficial effects: a plurality of first through holes can be used to pass through the tabs of the first row of bare cells, and each pole can be determined through the positioning of the insulating spacer The relative positions of the lugs and the first adapters on the insulating partition realize the uniform positioning of multiple tabs and multiple first adapters, thereby facilitating the connection of the first row of tabs and the first adapters . Similarly, the insulating spacer assembly also facilitates the connection of the tabs of the second row and the second adapter. Thus, the positioning operation between the lugs of each bare electric core and each adapter can be simplified, thereby improving assembly efficiency.

According to the insulation partition assembly of some embodiments of the present application, the top surface of the insulation partition is provided with a plurality of first installation grooves and a plurality of second installation grooves, and the first installation grooves are connected with the plurality of first installation grooves. A through hole is arranged in a staggered manner, each of the first installation grooves contains the first adapter piece, and the second installation groove and a plurality of the first through holes are arranged in a staggered manner, and each of the second installation grooves is arranged in a staggered manner. There is said second adapter.

According to the insulating partition assembly of some embodiments of the present application, two first through holes are provided between adjacent first installation grooves, and two through holes are arranged between adjacent second installation grooves. the second through hole.

According to the insulation partition assembly of some embodiments of the present application, a first clamping position is provided in the first installation groove, the first adapter is clamped to the first clamping position, and the second The installation slot also includes a second clamping position, and the second adapter is clamped to the second clamping position.

According to the insulating spacer assembly of some embodiments of the present application, the top surface of the insulating spacer is further provided with a first guide groove, and the first guide groove extends along the arrangement direction of the first through holes and is located at Between the first through hole and the second through hole, the first guide groove is provided with a plurality of guide through holes passing through the insulating partition, and the plurality of guide through holes are arranged along the first through hole. The extending directions of the guide grooves are arranged.

According to the insulation partition assembly of some embodiments of the present application, the bottom surface of the insulation partition is further provided with a second guide groove, the second guide groove communicates with the guide through hole, and the second guide The position of the slot is staggered from the position of the first through hole and the position of the second through hole.

According to the insulation partition assembly of some embodiments of the present application, the two sides of each of the guide through holes are respectively provided with the second guide grooves, and each of the second guide grooves is along a direction perpendicular to the first guide grooves. extend.

The battery module of the second embodiment of the present application includes:

The shell, the inside of the shell has an inner cavity, and the top of the shell is provided with an opening communicating with the inner cavity, and a plurality of partition plates are arranged at intervals in the inner cavity, and the partition plate dividing the inner cavity into a plurality of installation cavities;

A plurality of bare electric cores, the bare electric cores are accommodated in the installation cavity, the positive tabs and negative tabs of each of the bare electric cores are facing the top of the casing, and the tabs of the plurality of bare electric cores are Arranged in two rows, the tabs in each row include the positive tabs and the negative tabs arranged in a staggered manner;

In the above-mentioned insulating spacer assembly of the second aspect, the insulating spacer is located above the installation cavity, and the tabs of the first row are passed through the first through holes and connected to the first An adapter, the tabs of the second row are passed through the second through hole and connected to the second adapter, the first adapter, the second adapter and the two rows of the tabs Used to connect a plurality of bare cells in series to form a positive output tab and a negative output tab;

a top cover, the top cover is covered above the insulating partition and connected to the housing at the opening, the top cover is provided with a positive pole and a negative pole, and the positive pole is electrically connected to The positive output tab is electrically connected to the negative output tab.

The battery module according to the second aspect of the present application has at least the following beneficial effects: the bare battery cell is placed in the installation cavity, which saves the housing of the conventional single battery, thereby improving the space utilization ratio inside the housing, and effectively It helps to improve the energy density of the battery module. The insulating separator assembly realizes the unified positioning of multiple tabs and multiple adapters, which can simplify the positioning operation between the bare cell tabs and the adapters, and the bare cell It can be inserted into the shell first, and then the tabs can be connected with the insulating partition assembly, which solves the problem of difficulty in inserting bare cells into the shell, thereby improving assembly efficiency.

The battery pack according to the embodiment of the third aspect of the present application includes a case body and the battery module according to the embodiment of the second aspect above, and the battery module group is housed in the case body.

The battery module assembly method of the embodiment of the fourth aspect of the present application includes the following steps:

Prepare the housing, a plurality of bare cells, an insulating separator assembly, and a top cover as described in the above-mentioned embodiment of the second aspect;

placing each of the bare cells in each of the installation cavities of the casing, and the positive tabs and negative tabs of the plurality of bare cells are arranged in a staggered manner;

placing the insulating partition above the partition plate in the housing, so that the tabs of the first row pass upward through the first through hole, and the tabs of the second row passing upwards from the second through hole;

The positive tab and the negative tab in the tabs of the first column are fixedly connected to the first adapter in the manner of connecting adjacent bare cells in series, and the positive tabs in the tabs of the second column and the negative tab are fixedly connected to the second adapter in a manner of connecting adjacent bare cells in series, so that a plurality of the bare cells are connected in series;

Electrically connect the positive output tabs of the bare cells connected in series to the positive column of the top cover, and electrically connect the negative output tabs of the bare cells connected in series to the top cover the negative column;

Pressing the top cover into the opening of the housing from above the insulating partition assembly, and sealingly connecting the top cover with the housing.

The battery module assembly method of the fourth aspect embodiment of the present application has at least the following beneficial effects: first place the bare cell in the installation cavity, and then position and connect the tabs, which reduces the difficulty of assembling the bare cell into the case, The positioning of the tab and the adapter is realized through the positioning of the insulating partition and the housing, thereby facilitating the connection of the tab and the adapter, simplifying the positioning operation, and improving assembly efficiency.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present application is described further, wherein:

FIG. 1 is a schematic diagram of a three-dimensional structure of an insulating partition assembly according to an embodiment of the present application;

Fig. 2 is a three-dimensional structural schematic diagram of the insulating partition in Fig. 1;

Fig. 3 is the A-A sectional view of the insulating partition assembly of the embodiment shown in Fig. 1;

Fig. 4 is a partial enlarged schematic diagram of B in Fig. 3;

Fig. 5 is a schematic diagram of the top surface of the insulating partition in Fig. 2;

Fig. 6 is the C-C sectional view of the insulating spacer of the embodiment shown in Fig. 5;

Fig. 7 is a partially enlarged schematic diagram of D in Fig. 6;

Fig. 8 is a schematic diagram of the bottom surface of the insulating partition in Fig. 2;

FIG. 9 is a schematic diagram of a three-dimensional structure of a battery module according to an embodiment of the present application;

FIG. 10 is an exploded schematic diagram of part of the structure of the battery module of the embodiment shown in FIG. 9;

Fig. 11 is a schematic diagram of the assembly state of the bare cell and the insulating partition assembly in the embodiment shown in Fig. 10 (the shell is omitted);

FIG. 12 is a top view of FIG. 11 .

Reference signs:

An insulating partition 100, a top surface 101, and a bottom surface 102;

The first through hole 110, the second through hole 120, the first installation groove 130, the first locking position 131, the buckle 132, the surrounding wall 133, the bottom wall 134, the slope 135, the second installation groove 140, the second locking position 141, the first guide groove 150, the guide through hole 160, the second guide groove 170;

The insulating partition assembly 200, the first adapter piece 210, the relief slot 211, and the second adapter piece 220;

Shell 300, inner cavity 310, opening 320, partition plate 330, installation cavity 340;

Bare cells 400, tabs 410 in the first column, tabs 420 in the second column, positive output tabs 421, and negative output tabs 422;

Top cover 500, positive pole 510, negative pole 520, liquid injection hole 530, explosion-proof valve 540.

Detailed ways

Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are only for explaining the present application, and should not be construed as limiting the present application.

In the description of the present application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the present application and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present application, several means more than one, and above, below, within, etc. are understood to include the number. If there is a description of the first, second, etc., it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the indicated technical features successive relationship.

In the description of this application, unless otherwise clearly defined, words such as setting, installation, and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in this application in combination with the specific content of the technical solution.

In the description of this application, reference to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" is intended to mean that the embodiments Specific features, structures, materials, or characteristics described in or examples are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Figure 1 is a schematic diagram of the three-dimensional structure of an insulating partition assembly in one embodiment of the present application, and Figure 2 is a schematic diagram of the three-dimensional structure of the insulating partition in Figure 1, referring to Figures 1 and 2, the first embodiment of the present application provides An insulating spacer assembly 200 is used for connecting two rows of tabs of a plurality of bare electric cores in a row. The insulating spacer assembly 200 includes an insulating spacer 100 , a first adapter 210 , and a second adapter 220 . The insulating spacer 100 has an opposite top surface 101 and a bottom surface 102, and the insulating spacer 100 is provided with a row of first through holes 110 corresponding to the first row of the bare electric core tab area, and a row of first through holes 110 corresponding to the second row of the bare electric core. A row of second through holes 120 corresponding to the tab area of the row, the first through holes 110 and the second through holes 120 both penetrate the top surface 101 and the bottom surface 102, wherein a plurality of first through holes 110 are arranged at intervals for passing through A plurality of second through holes 120 are arranged at intervals for the tabs of the first row of bare cells, and are used to pass through the tabs of the second row of bare cells.

The first adapters 210 are disposed on the top surface 101 of the insulation partition 100 and arranged alternately with the plurality of first through holes 110 . The first adapters 210 are connected to the insulation partition 100 . The second adapters 220 are disposed on the top surface 101 of the insulating partition 100 and arranged alternately with the plurality of second through holes 120 . The second adapters 220 are connected to the insulating partition 100 . Thus, when the tabs of the first row are inserted into the first through holes 110, each tab in the first row can be located at the side of the corresponding first adapter 210, and when the tabs of the second row are pierced Located in the second through hole 120 , each tab in the second row can be located at the side of the corresponding second adapter piece 220 , thereby facilitating welding. Wherein, the first adapter 210 is used to connect the tabs of the first row of bare cells, and the second adapter 220 is used to connect the tabs of the second row of bare cells, so as to connect the bare cells in series. Therefore, the insulating spacer assembly of this embodiment is applied in a battery module, and each tab in the first row of bare cells can pass through the insulating spacer 100 through the first through hole 110 to reach the top surface 101 and be located at the first The side of the adapter piece 210 can facilitate the welding of the tabs of the first row and the first adapter piece 210 . Similarly, the tabs in the second row of bare cells can pass through the insulating partition 100 to reach the top surface 101 through the second through hole 120 and are located on the side of the first adapter 210, thereby facilitating the second Welding of the tabs of the column and the second adapter 220 .

In terms of structure, the first through hole 110 has a certain limiting effect on the tabs in the first row, the second through hole 120 has a certain limiting effect on the tabs in the second row, and the tabs in the first row have a certain limiting effect. After being set in the first through hole 110, its relative position with the first adapter piece 210 set on the top surface 101 is determined; The relative position of the second adapter 220 is determined, therefore, the position of the tabs of the first row of multiple bare cells relative to the first adapter 210, the position of the tabs of the second row relative to the second adapter 220 The position of each can be defined by the positioning of the insulating separator 100, without positioning and welding each bare cell and each first adapter 210, respectively positioning welding each bare cell and each second adapter 220, Therefore, the positioning operation between each tab of the bare electric core and each adapter can be simplified, thereby improving assembly efficiency.

From the perspective of assembly, when the insulating separator assembly 200 of this embodiment is used in a battery module, the bare cells can be inserted into the case first, and then the tabs can be pierced to avoid the risk of The position of the first through hole 110 and the second through hole 120 can be determined by positioning the insulating separator 100, so the relative positions of each tab and each adapter can be determined, thereby simplifying the bare cell The positioning operation of tabs and adapters facilitates the connection of tabs in the first row and the first adapter 210, and solves the problem of difficulty in inserting bare cells into the case, thereby helping to improve the assembly efficiency of battery modules .

It can be understood that the bare cells arranged in a row can form two rows of tabs arranged along the arrangement direction of the bare cells, and the connection between the adapter and the positive tabs and negative tabs of the bare cells can realize the connection of the bare cells. series and/or parallel. In the above embodiment, the first adapter 210 and several first through holes 110 can be arranged alternately in various ways, for example: one first through hole 110 and one first adapter 210 are arranged alternately in sequence, or , two first through holes 110 and one first adapter 210 are alternately arranged sequentially, or the above two methods are mixed and arranged, or other methods can be used to alternately arrange, the second adapter 220 and several second through holes 120 The same is true for the staggered arrangement. The specific arrangement can be reasonably set according to the distribution of the positive and negative tabs in the two columns of tabs of the bare cells to be connected, so as to facilitate the penetration of the tabs and the connection between the tabs and the adapter. In this way, the series and/or parallel connection of the bare cells can be realized.

The insulating spacer assembly of the embodiment of the present application is suitable for connecting the bare cells arranged in a row in series, wherein in the two rows of tabs of the bare cells, each row of tabs includes positive tabs and negative tabs arranged in a staggered manner, and the first transfer The piece and the second adapter piece can facilitate the connection of the positive and negative tabs of adjacent bare cells, thereby connecting the bare cells in series. Referring to FIG. 2 , the first through-hole 110 and the first transition piece 210 on the insulating spacer 100 can adopt the method of staggered arrangement of two first through-holes 110 and one first transition piece 210 in sequence, thus, Two sides of each first adapter 210 respectively have a first through hole 110 , and the arrangement of the second through hole 120 and the second adapter 220 is similar. Therefore, in the tabs of the first column, the positive tabs and negative tabs of two adjacent bare cells can respectively pass through the first through holes 110 on both sides of the same first adapter 210, which is convenient for connecting with the same first adapter. 210 welding, similarly, in the tabs of the second row, the positive tabs and negative tabs of two adjacent bare cells can respectively pass through the second through holes 120 on both sides of the same second adapter 220, so as to facilitate the connection with The same second adapter 220 is welded so as to connect the positive and negative tabs of adjacent bare cells to realize the series connection of multiple bare cells.

1 and 2, in some embodiments, the top surface 101 of the insulating spacer 100 is provided with a plurality of first installation grooves 130 and a plurality of second installation grooves 140, and a plurality of first installation grooves 130 are connected with a plurality of first installation grooves. Through-holes 110 are arranged in a staggered manner, and first adapters 210 are placed in each first installation groove 130. Therefore, after the tabs of the first row of bare cells pass through the first through-holes 110, they can be placed on the insulating spacer 100. The top surface is connected with the adjacent first transition piece 210 . A plurality of second installation grooves 140 are arranged alternately with a plurality of second through holes 120, and each second installation groove 140 contains a second adapter 220, so the tabs of the second row of bare cells pass through the second through holes. After the hole 120 , it can be connected to the adjacent second adapter piece 220 on the top surface of the insulating partition 100 . The setting of the first installation groove 130 and the second installation groove 140 can facilitate the quick positioning and installation of the first adapter piece 210 and the second adapter piece 220, and there is a set distance between the two to realize the first adapter piece 210 and the second adapter piece 220. Insulation of the second adapter 220 . The insulating separator assembly 200 of this embodiment is suitable for a battery module in which a plurality of bare cells are arranged in a row along one direction, and the bare cells are arranged in a row to form two rows of tabs arranged along the direction in which the bare cells are arranged. Therefore, The first through holes 110 can correspond to the tabs of the first row of bare cells, and the tabs of the first row can be easily connected to the first adapter 210 after passing through the first through holes 110 . Similarly, the second through holes 120 can correspond to the tabs of the second row of bare cells, and the tabs of the second row can be easily connected to the second adapter 220 after passing through the second through holes 120 .

In the above-mentioned embodiment, the connection methods of the first adapter 210 and the first installation groove 130, and the connection methods of the second adapter 220 and the second installation groove 140 can be various, for example: riveting, bonding, snapping Then wait. The embodiment of the present application provides a clamping connection method: FIG. 3 is an A-A sectional view of the insulating partition assembly of the embodiment shown in FIG. 1 , and FIG. 4 is a partially enlarged schematic diagram of part B in FIG. 3 , referring to FIG. 1 to FIG. 4. In some implementations of the insulating spacer assembly 200 , the first mounting slot 130 on the insulating spacer 100 is provided with a first locking position 131 , the first adapter 210 is accommodated in the first mounting slot 130 and The first adapter 210 is engaged with the first engaging position 131 , so that the first adapter 210 is fixed on the insulating partition 100 . Similarly, the second mounting groove 140 is provided with a second locking position 141, the second adapter 220 is accommodated in the second mounting groove 140, and the second adapter 220 is engaged with the second locking position 141 , so that the second adapter piece 220 is fixed on the insulating spacer 100 . In this way, the processing and assembly of the first transition piece 210 , the second transition piece 220 and the insulating partition 100 can be facilitated by the clamping manner.

Fig. 5 is a schematic diagram of the top surface of the insulating spacer in Fig. 2, Fig. 6 is a C-C sectional view of the insulating spacer of the embodiment shown in Fig. 5, and Fig. 7 is a partially enlarged schematic diagram of D in Fig. 6, referring to Fig. 2 to Fig. 7. In some embodiments, the first installation groove 130 includes a bottom wall 134 and a peripheral wall 133, and the peripheral wall 133 is provided with a protruding buckle 132, and a first engaging position is defined between the buckle 132 and the bottom wall 134 131 , the side of the first adapter 210 corresponding to the buckle 132 can be inserted into the first buckle 131 so as to be limited by the buckle 132 to avoid falling off. In addition, referring to FIG. 1 and FIG. 4 , the first adapter 210 can be provided with a relief groove 211 corresponding to the position of the buckle 132 to avoid the buckle 132 so that the first adapter 210 can be connected with the first buckle. The card connection of bit 131. The locking structure of the second installation slot 140 and the second adapter 220 is the same.

Referring to FIG. 1 , FIG. 2 and FIG. 5 , in some embodiments, the first installation groove 130 can also be provided with a fool-proof structure, which can prevent the first adapter 210 from being installed incorrectly or reversed. For example, an inclined surface 135 is provided on the peripheral wall 133 in any direction of the first installation groove 130, and the outer edge of the first adapter 210 is set to match the peripheral wall 133 and the inclined surface 135 of the first installation groove 130. If the direction of the connector 210 is misaligned or installed upside down, interference will occur at the inclined surface 135, so it cannot be correctly accommodated in the first installation groove 130, thereby forming a fool-proof, which is convenient for the fast and accurate installation of the first adapter 210 . Similarly, the second installation groove 140 may also be provided with a fool-proof structure, and its structure may refer to the first installation groove 130 .

In some embodiments of the insulation spacer assembly, referring to FIG. 6 , there is at least one first through hole 110 on both sides of each first installation groove 130 on the insulation spacer 100 , and between adjacent first installation grooves 130 Two first through holes 110 are provided, therefore, the positive tabs and negative tabs of two adjacent bare cells in the same row of tabs can respectively pass through the two first mounting slots 130 between adjacent ones. through holes 110 to prevent the positive tabs and negative tabs in the same column of adjacent bare cells from being confused with each other, so that the positive tabs, negative tabs and the first adapter 210 form an orderly arrangement, which is convenient for identifying each The positive and negative tabs at the same position and the first adapter 210 at the corresponding positions are convenient for welding the positive and negative tabs, which help to improve welding efficiency and reduce the risk of welding errors. Similarly, there is at least one second through-hole 120 on both sides of each second installation groove 140, and two second through-holes 120 are provided between adjacent second installation grooves 140, which can facilitate the threading operation and avoid The positive tabs and negative tabs in the same row of tabs of adjacent bare cells are confused with each other, which is convenient for identifying the positive tabs and negative tabs at each position and for welding the positive tabs and negative tabs to the second adapter 220 at the corresponding position. Helps improve welding efficiency and reduces the risk of welding errors.

Referring to FIG. 1 , FIG. 2 and FIG. 5 , in some embodiments, the top surface 101 of the insulating separator 100 is further provided with a first guide groove 150 for guiding the electrolyte during liquid injection. Wherein, the first guide groove 150 extends along the direction in which the first through holes 110 are arranged and is located between the first through hole 110 and the second through hole 120, so that the electrolyte can be guided to the position of each bare cell. The first guide groove A plurality of guiding through holes 160 penetrating the insulating partition 100 are disposed in the interior of the insulating partition 100 , and the plurality of guiding through holes 160 are arranged along the extending direction of the first guiding groove 150 . Thus, when the insulating separator assembly 200 of this embodiment is applied to a battery module, the electrolyte can be guided from the first guide groove 150 to each guide through hole 160 during liquid injection, and each guide through hole 160 can be respectively Corresponding to the position of each bare cell, the electrolyte can be injected into each bare cell through each guide through hole 160 , without injecting liquid into each bare cell separately, which can improve the liquid injection efficiency.

Fig. 8 is a schematic diagram of the bottom surface of the insulating partition in Fig. 2. Referring to Figs. The position of 170 is staggered with the positions of the first through hole 110 and the second through hole 120, and the second guide groove 170 communicates with the guide through hole 160 to increase the flow range of the electrolyte so that the electrolyte can flow from more The position enters the chamber where the bare cell is located. Therefore, during liquid injection, the electrolyte that flows downward through the guide through hole 160 can flow along the second guide groove 170 to reach more positions of the bare cell, so that the electrolyte It can wrap the bare cells more quickly and evenly, which helps to improve the efficiency of liquid injection.

6 and 8, in some embodiments, the two sides of each guide through hole 160 are respectively provided with the above-mentioned second guide groove 170, the second guide groove 170 extends along the direction perpendicular to the first guide groove 150, the second guide groove 170 The two guide grooves 170 can adopt the structure of bar-shaped grooves, and each second guide groove 170 is perpendicular to the first guide groove 150 . Thus, through the guiding effect of the second guide groove 170, the electrolyte flowing from the guide through hole 160 to the bare cell can flow toward both sides of the guide through hole 160 in a direction perpendicular to the first guide groove 150, so as to reach the bare cell. The two sides of the core, and each second guide groove 170 can correspond to the position of each bare cell, thereby ensuring the synchronous liquid injection of each bare cell, and also ensuring that the liquid electrolyte of the electrolyte reaching each bare cell volume consistency. In a specific embodiment, the battery module usually adopts bare cells with an approximate square structure, and multiple bare cells are stacked and arranged along the thickness direction. When the insulating spacer 100 of the example is applied to this type of battery module, each guide through hole 160 corresponds to the position of each bare cell, and the second guide grooves 170 on both sides of the guide through hole 160 can be respectively along the positions of the bare cells. The width direction extends to the edge of the bare cell, so the electrolyte can be guided along the width direction of the bare cell during liquid injection, so that the electrolyte can wrap the bare cell more quickly and evenly, which can effectively improve the efficiency of liquid injection .

The embodiment of the second aspect of the present application provides a battery module. FIG. 9 is a schematic perspective view of the three-dimensional structure of the battery module according to an embodiment of the present application. FIG. 10 is an exploded partial structure of the battery module of the embodiment shown in FIG. 9 Schematic diagram, referring to FIG. 9 and FIG. 10 , the battery module according to the embodiment of the present application includes a casing 300 , a plurality of bare cells 400 , an insulating separator assembly 200 and a top cover 500 . The inside of the housing 300 has an inner chamber 310, and the top of the housing 300 is provided with an opening 320 communicating with the inner chamber 310, and a plurality of partition plates 330 are arranged at intervals in the inner chamber 310, and the partition boards 330 separate the inner chamber 310. A plurality of installation cavities 340 are separated. The bare battery cell 400 is accommodated in the installation cavity 340 , and the positive tab and the negative tab of the bare battery cell 400 are facing the top of the casing 300 so as to be connected to the insulating separator assembly 200 . The positive tabs and negative tabs of each bare cell 400 are arranged separately along the width direction of the bare cell, and the tabs of a plurality of bare cells 400 are arranged in two rows, and each row of tabs includes positive tabs and negative tabs arranged in a staggered manner, as shown in Fig. 11 and Figure 12 uses "+" to indicate that the tab is a positive tab, and "-" indicates that the tab is a negative tab. In the battery module of this embodiment, the bare cell 400 is placed in the installation cavity 340, which saves the casing of the conventional single battery, thereby improving the space utilization rate inside the casing 300 and helping to improve the battery module. energy density. The top of the partition plate 330 is lower than the top of the peripheral wall of the casing 300, therefore, a longitudinal space capable of accommodating the insulating partition assembly 200 is formed between the top of the partition plate 330 and the peripheral wall of the casing 300, so that the insulating partition 100 can be placed The partition plate 330 is located inside the casing 300 , and the edge of the insulating partition 100 can be attached to the inner wall of the casing 300 , so as to limit the position of the insulating partition 100 and avoid the shaking of the insulating partition 100 .

Figure 11 is a schematic diagram of the assembly state of the bare cell and the insulating separator assembly in the embodiment shown in Figure 10 (the housing 300 is omitted), and Figure 12 is a top view of Figure 11, referring to Figures 10 and 11, the battery module of this embodiment adopts In the insulating spacer assembly 200 of any of the above embodiments, the insulating spacer assembly 200 is located above the installation cavity 340, and the two rows of tabs of the plurality of bare electric cores 400 can be respectively represented as the tabs 410 of the first column and the tabs of the second column. tabs 420, wherein the tabs 410 of the first row are penetrated through the first through holes 110 on the insulating spacer 100, and are connected to the first adapter 210 on the top surface 101 of the insulating spacer 100, the second Two rows of tabs 420 are passed through the second through hole 120 on the insulating spacer 100, and connected to the second adapter 220 on the top surface 101 of the insulating spacer 100, so that a plurality of bare cells 400 In series connection, the first transition piece 210 , the second transition piece 220 and two rows of tabs are used to connect a plurality of bare cells 400 in series to form a positive output tab 421 and a negative output tab 422 . During specific implementation, the first through hole 110 and the first adapter piece 210 on the insulating spacer 100 can be arranged alternately with two first through holes 110 and one first adapter piece 210 in sequence, thus, each Two sides of the first adapter 210 respectively have a first through hole 110 , and the arrangement of the second through hole 120 and the second adapter 220 is similar. Therefore, among the tabs 410 in the first column, the positive tabs and negative tabs of two adjacent bare cells respectively pass through the first through holes 110 on both sides of the same first adapter 210 , and are placed on the sides of the insulating separator 100 . The top surface 101 is welded to the same first adapter piece 210 . In the tabs 420 of the second column, the positive tabs and negative tabs of two adjacent bare cells can respectively pass through the second through holes 120 on both sides of the same second adapter 220, so as to facilitate the connection with the same second adapter. 220 welding, so as to connect the positive and negative tabs of adjacent bare cells, realize the series connection of multiple bare cells, and leave the positive and negative tabs on the bare cells at both ends to form multiple bare cells in series The positive output tab 421 and the negative output tab 422 of the core.

It should be noted that the tabs 410 of the first column pierced through the first through hole 110 can be bent to the surface of the first adapter 210 and then laser-welded with the first adapter 210. The second row of tabs 420 disposed in the second through hole 120 can be bent to the surface of the second adapter 220 , and then laser-welded with the second adapter 220 . The insulating spacer assembly 200 realizes unified positioning of multiple tabs and multiple adapters, which can simplify the positioning operation between the tabs of the bare cell 400 and the adapters, thereby improving assembly efficiency. Moreover, the insulating separator 100 realizes the insulation between the positive tab and the negative tab of the bare cell, the shell 300 and the partition plate 330 , effectively preventing short circuits in the cell and improving the safety of the cell.

9 and 10, the top cover 500 is provided with common components such as positive pole 510, negative pole 520, liquid injection hole 530, explosion-proof valve 540, etc., which can be rationally adapted according to specific production requirements. Wherein, the positive post 510 is electrically connected to the positive tab 410 , the negative post 520 is electrically connected to the negative tab 420 , and the liquid injection hole 530 is used for injecting liquid into the installation cavity 340 . The top cover 500 covers the insulating barrier 100 and is connected to the casing 300 at the opening 320, thereby encapsulating the bare cell 400 in the casing 300, and the top cover 500 presses the insulating barrier 100 from above, thereby limiting The position of the insulating partition 100 in the up-and-down direction prevents the failure of the connection between the lug and the adapter due to shaking.

Referring to FIG. 11 and FIG. 12 , in some embodiments of the battery module, the above-mentioned first guide groove 150 and the guide through hole 160 are provided on the insulating separator 100 , and the first guide groove 150 is provided on the top of the insulating separator 100 . Surface 101, the liquid injection hole 530 on the top cover 500 is set at the position corresponding to the first guide groove 150, so when liquid is injected, the electrolyte that enters through the liquid injection hole 530 can enter the first guide groove 150 and move along the first guide groove 150. The guide groove 150 flows to the top of the bare cell 400 in each installation cavity 340 , and enters each installation cavity 340 through each guide through hole 160 , so as to realize synchronous liquid injection into multiple installation cavities 340 . In some embodiments of the battery module, the bottom surface 102 of the insulating separator 100 is also provided with the above-mentioned second guide groove 170 (refer to FIG. 6 and FIG. 8 ), so the second guide groove 170 can transfer the electrolyte The flow is guided along the width direction of the bare cell 400 , so that the electrolyte can enter the installation cavity 340 more quickly, effectively improving the liquid injection efficiency.

The embodiment of the third aspect of the present application also provides a battery pack, including a box body and the battery module of the above embodiment, and the battery module is accommodated in the box body. It can be seen from the above that the battery module provided by the embodiment of the present application can effectively improve the energy density and assembly efficiency, therefore, the battery pack having the battery module also has the above advantages.

The embodiment of the fourth aspect of the present application also provides a battery module assembly method, which is used to assemble the battery module of the above-mentioned embodiment of the second aspect. Referring to Figures 9 to 12, the assembly method of this embodiment first The bare cell 400 is placed in the installation cavity 340, and then the tabs are positioned and connected, which reduces the difficulty of assembling the bare cell 400 into the case. The assembly method includes the following steps:

Prepare the casing 300, the plurality of bare cells 400, the insulating spacer assembly 200 and the top cover 500 in the above embodiment;

Place each bare cell 400 in each installation cavity 340 of the casing 300, and the positive tabs and negative tabs of the plurality of bare cells 400 are arranged in a staggered manner;

Place the insulating spacer 100 above the partition plate 330 in the casing 300, so that the tabs 410 of the first row pass upwards from the first through hole 110, and the tabs 420 of the second row pass through the second through hole 120. up through;

The positive and negative tabs in the tabs 410 of the first column are fixedly connected to the first adapter 210 in a manner of connecting adjacent bare cells 400 in series, and the positive tabs and negative tabs in the tabs 420 of the second column The ear is fixedly connected to the second adapter 220 in a manner of connecting adjacent bare electric cells 400 in series, so that a plurality of bare electric cells 400 are connected in series; the tabs of the second row are fixedly connected to the second adapter components, so that a plurality of the bare cells are connected in series to form a positive output tab 421 and a negative output tab 422;

Electrically connect the positive output tab 421 of the bare cells 400 connected in series to the positive pole 510 of the top cover 500, and electrically connect the negative output tab 422 of the bare cells 400 connected in series to the negative pole 520 of the top cover 500;

The top cover 500 is pressed into the opening 320 of the casing 300 from above the insulating partition assembly 200 , and the top cover 500 is sealedly connected with the casing 300 .

In the above assembly method, the positioning of the tab and the adapter is realized by positioning the insulating partition 100 and the housing 300 , thereby facilitating the connection of the tab and the adapter, effectively simplifying the positioning operation, and improving assembly efficiency.

In the above assembly method, before the tabs are inserted into the first through hole 110 and the second through hole 120, the tabs of each bare cell 400 can be pre-welded together, which can facilitate the tab penetration and prevent the tabs from Separated, after pre-welding, each tab is closed and in an upright state, which is convenient for assembly with the insulating separator 100 .

In the above assembly method, when connecting the tabs 410 in the first row and the first adapter 210, firstly press and bend each tab to be in close contact with the surface of the first adapter 210, and then use laser welding to weld the poles together. The ears are connected with the first adapter 210 . Therefore, the first row of tabs 410 and the first adapter 210 positioned by the insulating spacer 100 can be welded by mechanization, which helps to ensure welding quality and consistency. The connection between the tabs 420 in the second row and the second adapter 220 is the same.

In the above assembly method, laser welding can be used to realize the connection between the positive output tab 421 and the positive post 510 of the top cover 500 , the connection between the negative output tab 422 and the negative post 520 of the top cover 500 , and the sealing between the top cover 500 and the casing 300 connect.

The insulating separator assembly 200 , the battery module and the battery pack of the embodiments of the present application can be applied to power battery systems of various electrical equipment, for example, can be applied to power battery systems of new energy vehicles. As an energy storage device that provides electric energy for new energy vehicles, the energy density of the power battery is a direct factor affecting the cruising range, and the internal structure of the battery module has a significant impact on the energy density and economy of the battery module. It can be known from the foregoing that the insulating separator assembly 200 of the embodiment of the present application is applied to the battery module, which can simplify the assembly of the battery module, thereby reducing the assembly cost to a certain extent. The battery module of the embodiment of the present application omits The casing of the conventional single battery improves the space utilization rate inside the casing 300, helps to increase the energy density of the battery module, and also reduces the difficulty of inserting the bare cell 400 into the casing, optimizes the assembly process, and reduces the assembly process. Cost, so as to meet the needs of high energy density, high assembly efficiency and low cost of power battery system.

The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned embodiments, and within the scope of knowledge of those of ordinary skill in the art, various modifications can be made without departing from the purpose of the present application. Variety. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other under the condition of no conflict.

Claims (10)

An insulating spacer assembly, characterized in that it is used to connect two rows of tabs of a plurality of bare electric cores in a row, and the insulating spacer assembly includes: An insulating spacer, the insulating spacer has an opposite top surface and a bottom surface, and the insulating spacer is provided with a row of first through holes corresponding to the tab area of the first row of the bare electric cores, and is connected to the A row of second through holes corresponding to the tab area of the second row of bare cells, the first through hole and the second through hole passing through the top surface and the bottom surface; There are a plurality of first adapters, which are arranged on the top surface and arranged in a staggered manner with a plurality of the first through holes, the first adapters are connected to the insulating partition, and the first adapters suitable for welding connection with the tabs of the first column; A plurality of second adapters are arranged on the top surface and arranged in a staggered manner with a plurality of the second through holes, the second adapters are connected to the insulating partition, and the second adapters It is suitable for welding connection with the tabs of the second column. The insulating partition assembly according to claim 1, wherein the top surface of the insulating partition is provided with a plurality of first installation grooves and a plurality of second installation grooves, and the first installation grooves are connected with several The first through holes are arranged in a staggered manner, each of the first installation slots contains the first adapter piece, the second installation slots are arranged in a staggered manner with a plurality of the first through holes, and each of the second installation slots is arranged in a staggered manner. The second adapter is placed in the slot. The insulating partition assembly according to claim 2, wherein two first through holes are provided between adjacent first installation grooves, and two adjacent through holes are provided between adjacent second installation grooves. There are 2 said second through holes. The insulating partition assembly according to claim 2, wherein a first clamping position is provided in the first installation groove, and the first adapter is clamped to the first clamping position, so that The second installation groove further includes a second clamping position, and the second adapter is clamped to the second clamping position. The insulating spacer assembly according to any one of claims 1 to 4, characterized in that, the top surface of the insulating spacer is further provided with a first guide groove, and the first guide groove is arranged along the first guide groove. The arrangement direction of a through hole extends and is located between the first through hole and the second through hole, the first guide groove is provided with a plurality of guide through holes penetrating through the insulating partition, and the plurality of through holes The guide through holes are arranged along the extending direction of the first guide groove. The insulating spacer assembly according to claim 5, wherein the bottom surface of the insulating spacer is further provided with a second guide groove, the second guide groove communicates with the guide through hole, and the The position of the second guide groove is staggered from the position of the first through hole and the position of the second through hole. The insulating partition assembly according to claim 6, wherein the second guide grooves are respectively provided on both sides of each of the guide through holes, and each of the second guide grooves is perpendicular to the first guide groove. The direction of the groove extends. A battery module, characterized in that it comprises: The shell, the inside of the shell has an inner cavity, and the top of the shell is provided with an opening communicating with the inner cavity, and a plurality of partition plates are arranged at intervals in the inner cavity, and the partition plate dividing the inner cavity into a plurality of installation cavities; A plurality of bare electric cores, the bare electric cores are accommodated in the installation cavity, the positive tabs and negative tabs of each of the bare electric cores are facing the top of the casing, and the tabs of the plurality of bare electric cores are Arranged in two rows, the tabs in each row include the positive tabs and the negative tabs arranged in a staggered manner; The insulating spacer assembly according to any one of claims 1 to 7, wherein the insulating spacer is located above the installation cavity, the tabs of the first row are passed through the first through holes and connected to the first adapter, the tabs of the second row are passed through the second through hole and connected to the second adapter, the first adapter, the second adapter and The two rows of tabs are used to connect a plurality of bare cells in series to form a positive output tab and a negative output tab; a top cover, the top cover is covered above the insulating partition and connected to the housing at the opening, the top cover is provided with a positive pole and a negative pole, and the positive pole is electrically connected to The positive output tab is electrically connected to the negative output tab. A battery pack, characterized by comprising a box and the battery module according to claim 8, the battery module being accommodated in the box. An assembly method applied to the battery module according to claim 8, characterized in that it comprises the following steps: Prepare the casing, a plurality of bare electric cores, an insulating spacer assembly and a top cover as claimed in claim 8; placing each of the bare cells in each of the installation cavities of the casing, and the positive tabs and negative tabs of the plurality of bare cells are arranged in a staggered manner; placing the insulating partition above the partition plate in the housing, so that the tabs of the first row pass upward through the first through hole, and the tabs of the second row passing upwards from the second through hole; The positive tab and the negative tab in the tabs of the first column are fixedly connected to the first adapter in the manner of connecting adjacent bare cells in series, and the positive tabs in the tabs of the second column and the negative tab are fixedly connected to the second adapter in a manner of connecting adjacent bare cells in series, so that a plurality of the bare cells are connected in series; Electrically connect the positive output tabs of the bare cells connected in series to the positive column of the top cover, and electrically connect the negative output tabs of the bare cells connected in series to the top cover the negative column; Pressing the top cover into the opening of the housing from above the insulating partition assembly, and sealingly connecting the top cover with the housing.

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