CN113097654B

CN113097654B - Battery module

Info

Publication number: CN113097654B
Application number: CN202110347125.1A
Authority: CN
Inventors: 吴佳凡; 张志国
Original assignee: Zhuhai Cosmx Power Battery Co Ltd
Current assignee: Zhuhai Cosmx Power Battery Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2023-05-26
Anticipated expiration: 2041-03-31
Also published as: CN113097654A

Abstract

The invention provides a battery module, which comprises a plurality of battery cell assemblies and a bus bar, wherein each battery cell assembly comprises a battery cell unit, a positive electrode end and a negative electrode end, a plurality of conducting pieces of the bus bar are arranged at intervals to form a plurality of first avoidance bits, the bus bar accommodates at least one of the positive electrode end and the negative electrode end through the first avoidance bits, and at least one of the positive electrode end and the negative electrode end is electrically connected with an extension part. Therefore, the bus bar is fixed with the positive electrode end and the negative electrode end more conveniently without using a model tool, the production cost of the battery module is reduced, and the production efficiency of the battery module is improved.

Description

Battery module

Technical Field

The invention relates to the technical field of lithium ion batteries, in particular to a battery module.

Background

In order to realize modularized production of assembled batteries and improve production efficiency, the problem of welding of battery lugs needs to be solved. In the prior art, it is generally necessary to extend the tabs of a plurality of cells in a battery assembly from the tab holes of a bus bar and then connect the plurality of cells in series-parallel. However, the tab typically requires more mold tools to pass through the tab hole. When the number of the electric cores is large, the production efficiency is low and the production cost is high.

Disclosure of Invention

The embodiment of the invention aims to provide a battery module, which solves the problems of complex busbar installation and high short circuit risk in the prior art.

In order to achieve the above object, an embodiment of the present invention provides a battery module including:

the battery cell module comprises a plurality of battery cell assemblies, wherein each battery cell assembly comprises a battery cell unit, a positive electrode end and a negative electrode end;

the busbar, the busbar set up in the first side of electric core module, the busbar includes main part and a plurality of electrically conductive piece, a plurality of electrically conductive pieces are in set up side by side in the main part, and in the first side department of main part extends and is formed with a plurality of extension, arbitrary adjacent two be formed with first between the extension and keep away the position, first keep away the position is used for acceping positive terminal with at least one of the negative terminal, positive terminal with at least one of the negative terminal with extension electricity is connected.

Optionally, the plurality of extension portions are arranged side by side along a first direction, and the plurality of cell assemblies are arranged in a stacked manner along the first direction.

Optionally, the main part is formed by a plurality of connecting plates being connected side by side, and two adjacent connecting plates can be dismantled fixedly between, a plurality of electrically conductive piece one-to-one set up in on the plurality of connecting plates.

Optionally, the first end of the connecting plate is bent to form a bending part, the bending part includes the first side edge, the plurality of connecting plates are detachably fixed along a second direction, and the second direction is perpendicular to the first direction.

Optionally, the battery cell assembly includes a first sub-side, the positive terminal and the negative terminal are both located on the first sub-side, and the first side includes the first sub-side.

Optionally, the positive electrode end comprises a tab lead and a first electrode slice, and the negative electrode end comprises a tab lead and a second electrode slice;

the first electrode plate and the second electrode plate are arranged in a back-to-back mode, or the first electrode plate and the second electrode plate are arranged side by side.

Optionally, the battery cell assembly further includes a support frame, where the support frame is used to fix the battery cell unit, and the support frames of the plurality of battery cell assemblies are connected in a stacked manner;

the support frame comprises a first sub-side surface, the first sub-side surface comprises a second avoidance position, and the second avoidance position is used for accommodating the positive electrode end and the negative electrode end.

Optionally, one of a buckle or a clamping groove is arranged on the supporting frame, the other one of the buckle or the clamping groove is arranged on the first side edge, and the busbar and the battery cell module are fixedly connected through the buckle and the clamping groove.

Optionally, the battery cell unit includes a plurality of battery cells, and the plurality of battery cells are connected in series or in parallel to form the positive electrode terminal and the negative electrode terminal;

the plurality of battery cells comprise a first battery cell and a second battery cell which are adjacent, a first positive electrode lug and a first negative electrode lug are arranged on the second sub-side surface of the first battery cell, and a second positive electrode lug and a second negative electrode lug are arranged on the third sub-side surface of the second battery cell;

and the first battery cell and the second battery cell are connected in series or in parallel through the first positive electrode lug, the first negative electrode lug, the second positive electrode lug and the second negative electrode lug.

Optionally, the first battery cell and the second battery cell are arranged side by side, and the second sub-side surface and the third sub-side surface are arranged opposite to each other.

One of the above technical solutions has the following advantages or beneficial effects:

the embodiment of the invention provides a battery module, which comprises a plurality of battery cell assemblies and a busbar, wherein each battery cell assembly comprises a battery cell unit, a positive electrode end and a negative electrode end, a plurality of conducting pieces of the busbar are arranged at intervals to form a plurality of first avoidance bits, the first avoidance bits are used for accommodating at least one of the positive electrode end and the negative electrode end, and at least one of the positive electrode end and the negative electrode end is electrically connected with an extension part. The busbar is through first position of dodging acceptd the positive pole end and the negative pole end of electric core subassembly, first position one side opening of dodging, when installing the busbar, positive pole end with the negative pole end stretches into more easily first the avoiding and step down, and need not to use the model instrument, not only reduced battery module's the cost of production, still make battery module's equipment is simpler and more convenient, has improved battery module's the efficiency of production.

Drawings

Fig. 1 is an exploded view of a battery module according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a bus structure according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a battery module according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a battery cell assembly according to an embodiment of the present invention;

FIG. 5 is a second schematic diagram of a battery cell assembly according to an embodiment of the present invention;

fig. 6 is an exploded view of a battery cell assembly according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 6, an embodiment of the present invention provides a battery module including:

a cell module comprising a plurality of cell assemblies 100, each cell assembly 100 comprising a cell unit 150, a positive terminal and a negative terminal;

the busbar 200 is arranged on the first side surface of the battery cell module, the busbar 200 comprises a main body and a plurality of conductive pieces 210, the plurality of conductive pieces 210 are arranged on the main body side by side, a plurality of extending portions are formed at the first side edge of the main body in an extending mode, first avoidance bits 220 are formed between any two adjacent extending portions, the first avoidance bits 220 are used for accommodating at least one of the positive electrode terminal and the negative electrode terminal, and at least one of the positive electrode terminal and the negative electrode terminal is connected with the extending portions.

In the embodiment of the present invention, as shown in fig. 1, a plurality of cell assemblies 100 form the cell module, and each cell assembly 100 includes a positive electrode end and a negative electrode end, where the positive electrode end and the negative electrode end can be understood as output electrodes of the cell assembly 100, and the output electrodes are electrodes that are finally output based on a serial-parallel relationship of internal cells of the cell assembly 100, and may also be referred to as tabs of the cell assembly 100. The positive electrode end is an output positive electrode of the battery cell assembly 100, and the negative electrode end is an output negative electrode of the battery cell assembly 100.

The busbar 200 is designed as shown in fig. 2, and the extending portions of the conductive members 210 are distributed on the first side of the main body of the busbar 200 in a tooth shape, so that a first avoidance bit 220 can be formed between any two adjacent extending portions, and the first avoidance bit 220 can accommodate at least one of the positive terminal and the negative terminal, so as to facilitate the electrical connection between the at least one of the positive terminal and the negative terminal and the extending portion.

It should be noted that the serial-parallel connection between the plurality of the battery modules 100 may be adjusted by the bus bar 200, and may be specifically determined according to practical situations, which is not limited herein.

Based on the above-described structure of the battery module, when the bus bar 200 is mounted, the position of the first avoidance bit 220 on the bus bar 200 may be correspondingly determined based on the position of the output electrode of each cell assembly 100 so that the extension portion is electrically connected to at least one of the positive electrode terminal or the negative electrode terminal. The fixation between the bus bar 200 and the output electrode can be rapidly completed without using a model tool, so that the production cost of the battery module is reduced, the assembly of the battery module is simpler and more convenient, and the production efficiency of the battery module is improved.

It should be noted that the battery cell unit may include one or more battery cells, and the number of the battery cells may be determined according to practical situations, which is not limited herein.

Wherein the first direction may be understood as the A-A direction as shown in fig. 2 and 3.

In this embodiment, the side-by-side direction of the plurality of extending portions of the busbar 200 is the same as the stacking direction of the cell assembly 100, when the busbar 200 is mounted, the extending portions can be placed along the B-B direction, and the distance between the conductive member 210 of the busbar 200 and the positive and negative terminals of the cell assembly 100 is relatively close and staggered, so that the fixing between the conductive member 210 and the positive and negative terminals is more convenient.

Further, optionally, the main body is formed by connecting a plurality of connecting plates side by side, two adjacent connecting plates are detachably fixed, and the plurality of conductive pieces are arranged on the plurality of connecting plates in a one-to-one correspondence manner.

In this embodiment, as shown in fig. 2, the busbar 200 is formed by splicing a plurality of connection plates side by side, the number of the connection plates can be determined according to the number of the battery cell assemblies 100, and one of the connection plates is provided with one conductive member 210. When the battery module needs to be additionally mounted or dismounted, the bus bar 200 can be correspondingly mounted or dismounted with the connecting plate, so that the bus bar 200 can be more flexibly dismounted and mounted, and the requirements of different numbers of battery modules 100 can be met.

In this embodiment, as shown in fig. 2, the first ends of the connection plates are bent to form a bending portion, the bending portion includes the first side edge, and the connection plates are detachably fixed along a second direction, where the second direction is perpendicular to the first direction.

Wherein the second direction may be understood as the B-B direction as shown in fig. 2.

In this implementation manner, the first end of the connecting plate is bent to form a bending portion, so that the bending portion of the connecting portion forms a certain angle with other portions except for the bending portion, the bending portion extends along the B-B direction, and the other portions except for the bending portion extend along the A-A direction, so that the busbar 200 finally converges on at least one end face of the battery cell module, and adjustment of the serial-parallel connection relationship between the battery cell assemblies 100 is more conveniently completed.

In this embodiment, as shown in fig. 3, the output electrodes of each cell assembly 100 face the uniform side of the cell module and are arranged in a relatively regular manner. Such an arrangement can correspond to the arrangement of the conductive members 210 of the bus bar 200, more facilitate the installation of the bus bar 200, and more facilitate the fixation of the positive and negative terminals to the conductive members 210.

Alternatively, as shown in fig. 4, the positive electrode terminal includes a tab lead and a first electrode tab 110, and the negative electrode terminal includes a tab lead and a second electrode tab 120;

the first electrode sheet 110 and the second electrode sheet 120 are disposed at a back-to-back interval, or the first electrode sheet 110 and the second electrode sheet 120 are disposed at a side-by-side interval.

In this embodiment, the first electrode tab 110 is connected to the tab lead to form the positive electrode terminal, and the second electrode tab 120 is connected to the tab lead to form the negative electrode terminal. The first electrode tab 110 and the second electrode tab 120 may be directly in contact with the extension portion, thereby making the installation of the bus bar 200 more convenient.

In a specific implementation, as shown in fig. 4, the first electrode plate 110 and the second electrode plate 120 are arranged side by side at intervals, and the first electrode plate 110 and the second electrode plate 120 are insulated and do not interfere with each other, so that the short circuit risk of the battery cell assembly 100 is reduced.

In another implementation, as shown in fig. 5, the first electrode tab 110 and the second electrode tab 120 are disposed at a distance opposite to each other, so as to reduce the positions of the electrode tabs disposed on the cell assembly 100, and simplify the structure of the cell assembly 100. It will be appreciated that the sizes and structures of the first electrode pad 110 and the second electrode pad 120 may be determined according to the specific situation, and embodiments of the present invention are not limited herein.

Optionally, as shown in fig. 6, the cell assembly 100 further includes a support frame 130, where the support frame 130 is used to fix the cell units 150, and the support frames 130 of the multiple cell assemblies 100 are stacked and connected;

the support frame 130 includes a second avoidance position for receiving the positive electrode end and the negative electrode end.

In this embodiment, the material of the supporting frame 130 is an insulating material, and by setting the supporting frame 130, the cell unit 150 can be supported and the positions of the cells in the cell unit 150 can be fixed, so that gaps exist between adjacent cells, and short circuits are avoided. In addition, the support frame 130 is provided with the second avoidance bit, and the second avoidance bit may enable the positive electrode end and the negative electrode end to extend out of the support frame 130, so as to facilitate connection between the positive electrode end and the negative electrode end and the busbar 200.

In particular, the fixed connection manner between the battery cell unit 150 and the support frame 130 may be specifically determined according to the structure of the support frame 130 and the number and arrangement manner of the battery cells in the battery cell unit 150. For example, the supporting frame 130 may be a frame body with a hollowed-out middle, and the battery cell unit 150 may be clamped in the supporting frame 130; alternatively, the support frame 130 may be a non-hollow frame, and the battery cell 150 may be bonded to the support frame 130.

In one implementation, the support frame 130 is provided with one of a buckle or a slot, and the first side is provided with the other of the buckle or the slot, and the busbar 200 and the cell module are fixedly connected through the buckle and the slot.

In one implementation, as shown in fig. 1, the battery module further includes two end plates 300, the battery module further includes a second side surface and a third side surface opposite to each other, where the second side surface and the third side surface are adjacent to the first side surface and perpendicular to the stacking direction of the battery module 100, one of the two end plates 300 is disposed on the second side surface, and the other of the two end plates 300 is disposed on the third side surface. The end plates 300 may protect the exposed battery cells 150 on both end surfaces.

Optionally, as shown in fig. 4, the cell unit 150 includes a plurality of cells, where the plurality of cells are connected in series or in parallel to form the positive electrode terminal and the negative electrode terminal;

the plurality of battery cells comprise a first battery cell 101 and a second battery cell 102 which are adjacent to each other, a first positive electrode lug 1011 and a first negative electrode lug 1012 are arranged on a second sub-side surface of the first battery cell 101, and a second positive electrode lug 1021 and a second negative electrode lug 1022 are arranged on a third sub-side surface of the second battery cell 102;

at least one of the first positive electrode tab 1011 and the first negative electrode tab 1012 is welded and fixed with at least one of the second positive electrode tab 1021 and the second negative electrode tab 1022, and the first battery cell 101 and the second battery cell 102 are connected in series or in parallel through the first positive electrode tab 1011, the first negative electrode tab 1012, the second positive electrode tab 1021 and the second negative electrode tab 1022.

It should be noted that, in fig. 4, only one positional relationship between the first battery cell 101 and the first battery cell 102 in the specific embodiment is illustrated, and a specific implementation form of the positional relationship between the first battery cell 101 and the first battery cell 102 may be determined according to actual situations, which is not limited herein.

In this embodiment, the first cell 101 includes a first tab pair, which is a first positive tab 1011 and a first negative tab 1012, respectively, and the second cell 102 includes a second tab pair, which is a second positive tab 1021 and a second negative tab 1022, respectively. Any adjacent first battery cell 101 and first battery cell 102 are connected in series or in parallel through the first positive electrode tab 1011, the first negative electrode tab 1012, the second positive electrode tab 1021 and the second negative electrode tab 1022, so that a plurality of battery cells form a whole through series connection and/or parallel connection. The connection relationship between the first battery cell 101 and the second battery cell 102 may include at least five of the following cases:

in the first case, the first positive electrode tab 1011 and the second positive electrode tab 1021 are welded and fixed, and the first negative electrode tab 1012 and the second negative electrode tab 1022 are not welded and fixed. In this case, the first cell 101 and the first cell 102 are connected in parallel.

In the second case, the first positive electrode tab 1011 and the second negative electrode tab 1022 are welded and fixed, and the first negative electrode tab 1012 and the second positive electrode tab 1021 are not welded and fixed. In this case, the first cell 101 and the first cell 102 are connected in series.

In the third case, the first negative electrode tab 1012 and the second negative electrode tab 1022 are welded and fixed, and the first positive electrode tab 1011 and the second positive electrode tab 1021 are not welded and fixed. In this case, the first cell 101 and the first cell 102 are connected in parallel.

In the fourth case, the first negative electrode tab 1012 is welded to the second positive electrode tab 1021, and the first positive electrode tab 1011 is not welded to the second negative electrode tab 1022. In this case, the first cell 101 and the first cell 102 are connected in series.

In the fifth case, the first positive electrode tab 1011 and the second positive electrode tab 1021 are welded and fixed, and the first negative electrode tab 1012 and the second negative electrode tab 1022 are welded and fixed. In this case, the first cell 101 and the first cell 102 are connected in parallel.

In one implementation, the first cell 101 is disposed side by side with the second cell 102, and the second sub-side is disposed opposite the third sub-side.

In this implementation manner, as shown in fig. 4, the first battery cell 101 and the first battery cell 102 are arranged side by side, and the second sub-side surface and the third sub-side surface are arranged opposite to each other, so that the first tab pair and the second tab pair are also arranged opposite to each other. Therefore, the operation convenience of welding the first tab pair and the second tab pair is improved, and the connection stability of the first tab pair and the second tab pair is improved.

Further, in a specific implementation form, the first positive tab 1011 is disposed opposite to any one of the second positive tab 1021 and the second negative tab 1022; the first negative electrode tab 1012 is disposed opposite to the other of the second positive electrode tab 1021 and the second negative electrode tab 1022.

In this implementation manner, two cases may be specifically included:

in the first case, the first positive electrode tab 1011 is disposed opposite to the second positive electrode tab 1021, and the first negative electrode tab 1012 is disposed opposite to the second negative electrode tab 1022. When the first positive electrode tab 1011 and the second positive electrode tab 1021 are welded and fixed, it can be considered that the first end of the first battery cell 101 and the first end of the first battery cell 102 are connected in parallel; in the case where the first negative electrode tab 1012 and the second negative electrode tab 1022 are welded together, the second end of the first cell 101 and the second end of the first cell 102 may be considered to be connected in parallel. Further, when the battery cell unit 150 includes only the first battery cell 101 and the first battery cell 102, the first positive electrode tab 1011 and the second positive electrode tab 1021 are welded and fixed to form the positive electrode terminal; the first negative tab 1012 is welded to the second negative tab 1022 to form the negative terminal.

In the second case, the first positive electrode tab 1011 is disposed opposite to the second negative electrode tab 1022, and the first negative electrode tab 1012 is disposed opposite to the second positive electrode tab 1021. When the first positive tab 1011 and the second negative tab 1022 are welded and fixed, the first end of the first cell 101 and the first end of the first cell 102 may be considered to be connected in series. Further, when the battery cell unit 150 includes only the first battery cell 101 and the first battery cell 102, the second positive electrode tab 1021 forms the positive electrode terminal, and the first negative electrode tab 1012 forms the negative electrode terminal.

When the first negative electrode tab 1012 and the second positive electrode tab 1021 are welded together, the second end of the first cell 101 and the second end of the first cell 102 may be considered to be connected in series. Further, when the battery cell unit 150 includes only the first battery cell 101 and the first battery cell 102, the first positive tab 1011 forms the positive terminal, and the second negative tab 1022 forms the negative terminal.

In the specific implementation form, the series connection or the parallel connection between the adjacent battery cells can be realized through the connection between the oppositely arranged lugs, so that the operation convenience of welding between the lugs and the connection stability between the lugs are further improved.

In this embodiment, based on the adjacent arrangement of the first electrical core 101 and the second electrical core 102, when a plurality of electrical cores are in a series connection or parallel connection, only the adjacent electrode tabs of the electrical cores need to be welded and fixed, the assembly of the electrical core assembly 100 is simpler, and a busbar or a copper bar is not needed in the electrical core assembly 100, so that the manufacturing cost of the electrical core assembly 100 is reduced.

In the present embodiment, the positive electrode terminal may be formed by the positive electrode tab of any one of the battery cells, or may be formed by the positive electrode tabs of a plurality of the battery cells in parallel.

In the first case, the positive electrode terminal is formed by the positive electrode tab of any one of the battery cells, and the positive electrode tab is electrically connected to the first electrode tab 110.

In the second case, the positive electrode terminal is formed by connecting the positive electrode tabs of the plurality of battery cells in parallel, that is, the positive electrode tabs of the adjacent plurality of battery cells are welded and fixed, so as to form the positive electrode terminal, and electrically connected with the first electrode tab 110.

In the third case, the positive electrode terminal is formed by connecting the positive electrode tabs of the plurality of battery cells in parallel, that is, the positive electrode tabs of the adjacent plurality of battery cells are electrically connected to the first electrode tab 110, respectively.

The negative electrode terminal may be formed by the negative electrode tab of any one of the battery cells, or may be formed by the negative electrode tabs of a plurality of the battery cells in parallel.

In the first case, the negative electrode terminal is formed by the negative electrode tab of any one of the battery cells, and the negative electrode tab is electrically connected to the second electrode tab 120.

In the second case, the negative electrode terminal is formed by connecting the negative electrode tabs of the plurality of battery cells in parallel, that is, the negative electrode tabs of the adjacent plurality of battery cells are welded and fixed, so as to form the negative electrode terminal, and electrically connected with the second electrode sheet 120.

In the third case, the negative electrode terminal is formed by connecting the negative electrode tabs of the plurality of battery cells in parallel, that is, the negative electrode tabs of the adjacent plurality of battery cells are electrically connected to the second electrode tab 120, respectively.

Optionally, as shown in fig. 1, the battery module further includes:

the signal acquisition module 400 is arranged on any one side surface of the battery cell module, and the signal acquisition module 400 is connected with the battery cells in each battery cell assembly 100 and is used for acquiring at least one of voltage signals and temperature signals of the battery cells;

as shown in fig. 5 and 6, the battery cell assembly 100 further includes at least one signal acquisition unit 140, an input end of the signal acquisition unit 140 is connected with the battery cell, and an output end of the signal acquisition unit 140 is connected with the signal acquisition module 400.

In a specific embodiment, as shown in fig. 6, the battery cell assembly 100 may further include a buffer member 160, where the buffer member 160 may be disposed between the battery cell unit 150 and the support frame 130 to reduce interaction between the battery cell unit 150 and the support frame 130, protect the battery cell unit 150, and reserve an expansion space for the battery cell unit 150 when the battery cell unit 150 expands due to heat generated during operation, so as to reduce the risk of the battery module expanding or even exploding due to high temperature. The buffer 160 may also be disposed between two adjacent cells, which is not limited herein. The cushioning member 160 may be foam or other material, and is not limited herein.

In a specific embodiment, as shown in fig. 6, the battery cell assembly 100 may further include a heat dissipation member 170, and the heat dissipation member 170 may help the battery cell assembly dissipate heat, and reduce the risk of the battery module expanding or even exploding due to high temperature.

In summary, in the battery module provided by the embodiment of the invention, the battery module includes a plurality of battery cell assemblies and a busbar, each battery cell assembly includes a battery cell unit, a positive terminal and a negative terminal, a plurality of conductive members of the busbar are arranged at intervals to form a plurality of first avoidance bits, the first avoidance bits are used for accommodating at least one of the positive terminal and the negative terminal, and at least one of the positive terminal and the negative terminal is electrically connected with the extension portion. The busbar is through first position of dodging acceptd the positive pole end and the negative pole end of electric core subassembly, first position one side opening of dodging, when installing the busbar, positive pole end with the negative pole end stretches into more easily first the avoiding and step down, and need not to use the model instrument, not only reduced battery module's the cost of production, still make battery module's equipment is simpler and more convenient, has improved battery module's the efficiency of production.

It should be noted that, the various alternative embodiments described in the embodiments of the present invention may be implemented in combination with each other, or may be implemented separately, which is not limited to the embodiments of the present invention.

In the description of the present invention, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The embodiments described above are described with reference to the drawings, and other different forms and embodiments are possible without departing from the principle of the invention, and therefore, the invention should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will convey the scope of the invention to those skilled in the art. In the drawings, component dimensions and relative dimensions may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. The terms "comprises," "comprising," and/or "includes," when used in this specification, specify the presence of stated features, integers, components, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, components, and/or groups thereof. Unless otherwise indicated, a range of values includes the upper and lower limits of the range and any subranges therebetween.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and changes can be made without departing from the principles of the present invention, and such modifications and changes are intended to be within the scope of the present invention.

Claims

1. A battery module, comprising:

the busbar is arranged on the first side surface of the battery cell module, the busbar comprises a main body and a plurality of conductive pieces, the plurality of conductive pieces are arranged on the main body side by side, a plurality of extending parts are formed at the first side edge of the main body along the first side surface in an extending mode, a first avoidance position is formed between any two adjacent extending parts, the first avoidance position is used for accommodating at least one of the positive electrode end and the negative electrode end, and at least one of the positive electrode end and the negative electrode end is in contact with the extending parts to generate electric connection;

the main body is formed by connecting a plurality of connecting plates side by side, two adjacent connecting plates are detachably fixed, and a plurality of conductive pieces are arranged on the plurality of connecting plates in a one-to-one correspondence manner.

2. The battery module of claim 1, wherein the plurality of extensions are disposed side-by-side along a first direction, and the plurality of cell assemblies are stacked along the first direction.

3. The battery module according to claim 2, wherein the first ends of the connection plates are bent to form a bent portion, the bent portion includes the first side edge, the connection plates are detachably fixed along a second direction, and the second direction is perpendicular to the first direction.

4. The battery module of any one of claims 1 to 3, wherein the cell assembly includes a first sub-side, the positive terminal and the negative terminal being both located on the first sub-side, the first side including the first sub-side.

5. The battery module of claim 4, wherein the positive terminal comprises a tab lead and a first electrode tab, and the negative terminal comprises a tab lead and a second electrode tab;

the first electrode plate and the second electrode plate are arranged at intervals in a back-to-back mode, or the first electrode plate and the second electrode plate are arranged at intervals in a side-to-side mode.

6. The battery module according to claim 4, wherein the cell assembly further comprises a support frame for fixing the cell units, the support frames of the plurality of cell assemblies being connected in a stacked manner;

the support frame includes a second avoidance bit for receiving the positive end and the negative end.

7. The battery module of claim 6, wherein the support frame is provided with one of a buckle or a slot, the first side is provided with the other of a buckle or a slot, and the busbar and the battery cell module are fixedly connected through the buckle and the slot.

8. The battery module of claim 4, wherein the cell unit comprises a plurality of cells that form the positive terminal and the negative terminal after being connected in series or in parallel;

9. The battery module of claim 8, wherein the first cell is disposed side-by-side with the second cell and the second sub-side is disposed opposite the third sub-side.