A battery module

Abstract

The utility model discloses a battery module, which relates to the field of battery technology. The battery module includes: a plurality of battery cells; a harness integrated bracket, the harness integrated bracket includes a bracket body, and a plurality of pole ear channels are penetrated through the bracket body; a plurality of conductive sheets, the conductive sheets are arranged above the bracket body, and the pole ear sheets of the battery cells are connected to the conductive sheets after being bent through the pole ear channels; wherein the pole ear sheets connected to the same conductive sheet have different widths, and the width of each pole ear sheet is less than the length of the conductive sheet. Before welding, the wider pole ear sheet is first bent and attached to the top of the conductive sheet, and then the narrower pole ear sheet is attached to the top of the wider pole ear sheet. During welding, the narrower pole ear sheet is welded to the overlapping part of the wider pole ear sheet, and the wider pole ear sheet is welded to the conductive sheet, and then a current loop is formed through laser welding, which solves the problem that the existing pole ear sheet is not firmly welded to the conductive sheet after being bent through the bracket.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery module. Background Art

[0002] With the development of science and technology, the power battery industry is constantly rising, and the degree of diversification of power development applications is becoming higher and higher. Different products are constantly being developed, such as high current, high voltage, high energy ratio, etc. In order to achieve these characteristics, the battery cells need to be assembled in different series and parallel groups, and the battery PACK soft pack battery cell grouping needs to have a reliable electrical connection, and the voltage and temperature of the corresponding battery cells need to be sampled. For high-current batteries with a non-parallel structure, in the electrical connection between the battery cells, the tabs of the two battery cells need to be folded in series, which undoubtedly puts higher requirements on the battery cell tab connection structure.

[0003] In the prior art, since the thickness of soft-pack cells is relatively thin, and the current carrying capacity of the cells also has requirements for the contact area of ​​the tabs, the tabs contained therein are generally in a sheet-like structure and require a certain length. Therefore, the series connection of the cells in the battery module mainly relies on the clamps to vertically fit the tabs of two adjacent cells together, and then the tabs are meshed together through metal clips to form a current path, and the voltage and temperature collection is also close to the two tabs. This method is mainly manual, and the manual operation method increases labor costs and is inefficient. At the same time, because the clamp solution has no fixed platform, the collection harness needs to be close to the tab side, which is more difficult in terms of process, resulting in difficulties in installing the voltage and temperature collection harnesses.

[0004] In the prior art, a pole ear bracket with a through hole is usually used to solve the above problems. However, when the pole ear is bent after passing through the through hole and welded to the conductive sheet separately or in layers, the bent pole ear and the conductive sheet are easily not welded firmly. At the same time, there is no special collection harness assembly space, resulting in the battery module still having problems in the actual production process, such as low assembly efficiency of the voltage / temperature collection harness, loose connection between the collection harness and the conductive sheet, and tight electrical connection space for single-parallel and multi-string batteries. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a battery module.

[0006] The technical solution of the utility model is as follows:

[0007] A battery module, comprising:

[0008] A plurality of battery cells; a wiring harness integrated bracket, the wiring harness integrated bracket comprising a bracket body, the bracket body being penetrated by a plurality of pole ear channels; a plurality of conductive sheets, the conductive sheets being arranged above the bracket body, the pole ear sheets of the battery cells being bent through the pole ear channels and connected to the conductive sheets; wherein the pole ear sheets connected to the same conductive sheet have different widths, and the width of each pole ear sheet is smaller than the length of the conductive sheet.

[0009] In the above technical solution, the widths of the pole tabs connected to the same conductive sheet are different, and the width of each pole tab is less than the length of the conductive sheet. After the battery cells are stacked, the positive and negative pole tabs of the battery cells pass through the bracket body and are bent in a negative-positive (series) manner. Before welding, the wider pole tab is first bent and attached to the top of the conductive sheet, and then the narrower pole tab is attached to the top of the wider pole tab, so that the pole tab connected to the same conductive sheet and the conductive sheet form a stacked layer in the length direction of the conductive sheet. During welding, the narrower pole tab is welded to the overlapping part of the wider pole tab, and the wider pole tab is welded to the conductive sheet. The former ensures good contact between the pole tabs of the battery cell, and the latter ensures good contact between the pole tab and the conductive sheet, thereby ensuring the continuity of the battery current circuit and avoiding the situation where multi-layer welding cannot ensure good welding of the middle layer pole tab with other layers when the pole tabs are equal in width.

[0010] In some embodiments, a battery module includes a plurality of battery cells, a wiring harness integrated bracket, and a conductive sheet, wherein the positive and negative tabs of the battery cells have the same width, and the tabs of adjacent battery cells connected to the same conductive sheet have different widths. The positive tab, the negative tab, and the conductive sheet are laminated according to the above stacking layers.

[0011] In some embodiments, a battery module includes a plurality of battery cells, a wiring harness integrated bracket located at both ends of the battery cells, and a conductive sheet, wherein the positive and negative tabs of a single battery cell have different widths and are arranged at opposite ends of the battery cell. After bending, the wider tab is first attached to the top of the conductive sheet, and then the narrower tab is attached to the top of the wider tab, and then laser welding is performed to form a current loop.

[0012] In some embodiments, a battery module includes multiple battery cells, a wiring harness integrated bracket located at one end of the battery cell, and a conductive sheet, wherein the positive electrode tab and the negative electrode tab of the battery cell have different widths, and the positive electrode tab and the negative electrode tab are located on the same sealing edge of the battery cell.

[0013] In some embodiments, a pole tab limiting portion is provided on the bracket body, and the pole tab channel is arranged on both sides of the pole tab limiting portion; a first limiting portion is provided at the bottom of the bracket body between adjacent pole tab limiting portions; the pole tab limiting portion includes a support bar, and the bottom of the support bar is protruding and forms a battery cell limiting groove with the adjacent first limiting portion.

[0014] In the above technical solution, the bottom of the support bar of the wiring harness integrated bracket is protruded to form a cell limiting groove with the adjacent first limiting part, so that the position of the cell in the battery module is stable, which is beneficial to protecting the cell and improving the safety of the cell.

[0015] In some preferred embodiments, a second limiting portion is extended from the bottom of the support bar, and the adjacent second limiting portion, the first limiting portion and the bottom of the support bar form a single battery cell limiting groove. The second limiting portion and the first limiting portion are flush with one end of the battery cell. The adjacent second limiting portion, the first limiting portion and the bracket body are used to limit the position of a single battery cell, which facilitates the disassembly and assembly of the battery cell, further improves the position stability of the battery cell in the module, ensures the safety of the battery cell and even the battery module, avoids mutual influence between adjacent battery cells, and improves the service life of the battery module.

[0016] In some optional embodiments, each support bar surface is provided with a hollow area, the cross section of the hollow area gradually decreases toward the direction of the battery cell, and a plurality of ribs are arranged in the hollow area, and the end surface of the rib facing the conductive sheet is flush with the outer edge of the hollow area. The above-mentioned hollow area can provide a placement space for the collection harness. During assembly, the voltage, current and other collection wires are placed in the hollow area and the conductive sheet is placed above the hollow area. The collection wires are welded to the conductive sheet, which is firm and reliable, and makes the overall structure of the battery compact and the size reduced, effectively solving the problems of low assembly efficiency of the voltage, current and other collection harnesses, loose connection between the collection harness and the conductive sheet, and low utilization of the electrical connection space, thereby improving space utilization and production efficiency. In addition, by separating the hollow area into several small hollow areas through ribs, an independent placement space can be provided for each collection harness of voltage, temperature, etc. The assembly is regular, the structure is simple, and the overall strength of the bracket is high.

[0017] In some preferred embodiments, the support bar has a "Y"-shaped cross section.

[0018] In some optional embodiments, a positioning structure is provided on the outer edge of the hollow area on the support bar, and a limiting structure compatible with the positioning structure is provided on the conductive sheet. The above positioning structure cooperates with the limiting structure to prevent the conductive sheet from shaking, ensure the stability and reliability of the electrical connection, and facilitate the installation of the conductive sheet to improve the assembly efficiency of the battery. Specifically, a limiting hole is provided at one end of the conductive sheet, and two limiting openings are provided at the other end; a limiting column compatible with the limiting hole is provided at one end of the outer edge of the hollow area on the support bar, and two limiting columns compatible with the limiting openings are provided at the other end.

[0019] In some optional embodiments, a receiving space adapted to the conductive sheet is provided on the support body above the surface of the support bar. Placing the conductive sheet in the receiving space can further improve the stability of the conductive sheet in the battery module and improve space utilization.

[0020] In some optional embodiments, the middle part of the support body is recessed in the direction of the battery cell and is provided with a strip-shaped groove to form a harness integration area. A collection harness is provided in the harness integration area. The collection harness includes a connection end and a collection end. The connection end is connected to the harness terminal. The collection end is used to collect temperature and voltage signals. In some specific implementations, at least one of the collection ends is connected to a temperature collector, and the other collection ends are electrically connected to the conductive sheet for collecting voltage signals. The collection harness can be retained in the middle groove, which has more wire space than the PCB board solution, so it can meet the sampling of high-power and large-number modules; in some optional embodiments, a notch is provided on one side of the pole ear limiter close to the harness integration area, so as to penetrate the harness integration area and the hollow area. After the harness passes through the notch, the connection with the conductive sheet is more stable, and the space utilization rate is higher. Specifically, the notch is set between the two limit columns on the outer edge of the hollow area on the support bar.

[0021] In some optional embodiments, the support body is provided with a plurality of heat dissipation holes in the wiring harness integration area, which can improve the heat dissipation performance of the wiring harness integration area and improve the safety performance of the battery.

[0022] In some optional embodiments, the support body is provided with air holes. Specifically, air holes can be provided at the tab limiter to further enhance the fluid performance of the air inside the battery and improve the heat dissipation performance of the battery.

[0023] In some optional embodiments, both sides of the bracket body are recessed toward the battery core to form a total positive / negative integrated component placement area, and a total positive / negative electrode integrated component is provided in the total positive / negative integrated component placement area.

[0024] Furthermore, a boss is provided in the placement area of ​​the total positive / negative integrated part, and a gluing hole is provided in the boss. The boss is used to support the total positive / negative integrated part, and the gluing hole is used to glue and bond the total positive / negative integrated part.

[0025] In some optional embodiments, the bracket body may be a plastic part, and other structures may be designed to facilitate the assembly of subsequent components on the part.

[0026] In some optional embodiments, the conductive sheet is a series of aluminum bars, which have a square plate structure and are placed above the support bar when in use. In the present technical solution, the series of aluminum bars are easy to process and simple to make, and the aluminum material has a low density, light weight, and excellent electrical and thermal conductivity, and is suitable for collecting battery voltage, temperature and other parameters.

[0027] Compared with the prior art, the beneficial effects of the utility model are: 1. The battery module of the utility model sets the pole ear sheets connected to the same conductive sheet to different widths. The pole ear sheets pass through the bracket and are bent to form a stacked layer with the conductive sheet. Multiple welds are welded during welding, which can effectively avoid the situation where the battery current circuit cannot be normally connected due to poor contact between the pole ear or the pole ear and the conductive sheet; 2. The wiring harness integrated bracket has high integration and convenient assembly. The module stacking can be completed by welding the pole ear of the soft-pack battery cell to the bracket. The welding process is completely automated, which can greatly improve production efficiency; 3. The sampling harness is arranged inside the bracket, so that the overall structure is compact and the overall size is reduced; 4. The hollow area of ​​the groove in the middle of the bracket and the support bar can have more wire space, which can meet the sampling of high-power and large-number modules. At the same time, the bracket can be designed with other structures to facilitate the assembly of subsequent components on the part; 5. The pole ear of the battery module is welded on the bracket. Since the sampling and electrical connection are both welded, it is firm and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the top view of a battery module of the utility model;

[0029] Figure 2 This is a schematic diagram of the structure of a battery cell in a battery module of the utility model;

[0030] Figure 3 This is a partial top view structural diagram of a battery module of the utility model;

[0031] Figure 4 This is a schematic diagram of the three-dimensional structure of a wiring harness integrated bracket and a battery cell before assembly;

[0032] Figure 5 This is a schematic diagram of a cross-sectional structure of a wiring harness integrated bracket of the utility model;

[0033] Figure 6 This is a schematic diagram of the bottom three-dimensional structure of a wiring harness integrated bracket of the utility model;

[0034] Figure 7 This is a schematic diagram of the structural arrangement of a wiring harness integrated bracket and a battery cell before assembly according to the utility model;

[0035] Figure 8 This is a schematic diagram of the partial structure of a wiring harness integrated bracket and a battery cell after being assembled according to the utility model;

[0036] Fig. 9 This is a schematic diagram of a top view structure of a wiring harness integrated bracket and a conductive sheet of the utility model;

[0037] Fig.10 It is a three-dimensional structural schematic diagram of a wiring harness integrated bracket and a conductive sheet of the utility model;

[0038] Fig.11 This is a three-dimensional exploded schematic diagram of a battery module of the utility model;

[0039] In the figure: 1. bracket body; 11. wiring harness integration area; 12. ear limit part; 121. support bar; 1211. second limit part; 122. first limit part; 123. ear channel; 124. hollow area; 125. rib plate; 126. limit column; 127. air vent; 128. notch; 2. battery cell; 21. positive ear piece; 22. negative ear piece; 23. aluminum-plastic film; 3. conductive sheet; 31. limit opening; 32. limit hole; 4. collection harness; 5. total positive / negative integrated part; 6. battery cell limit groove; 7. accommodation space; 8. harness terminal; 9. total positive / negative integrated part placement area; 91. boss; 92. glue hole; 10. heat dissipation hole. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the various embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] like Figure 1-3 As shown, a battery module comprises:

[0042] A plurality of battery cells 2; a wiring harness integrated bracket (CCS, Cells Contact System), the wiring harness integrated bracket comprising a bracket body 1, the bracket body 1 having a plurality of pole ear channels 123 passing through the bracket body 1; a plurality of conductive sheets 3, the conductive sheets 3 being arranged above the bracket body 1, the pole ear sheets of the battery cells 2 being bent through the pole ear channels 123 and connected to the conductive sheets 3; wherein the pole ear sheets connected to the same conductive sheet 3 have different widths, and the width of each pole ear sheet is less than the length of the conductive sheet 3.

[0043] The stacking method of the battery cell 2 is as follows Figure 4 As shown, the bracket body 1 is placed vertically in the direction, the soft-pack battery cells 2 are stacked from bottom to top, and after the pole tabs pass through the pole tab channels 123 of the bracket body 1, the pole tabs are bent in a negative-positive series manner and attached to the conductive sheet 3, and then laser welded to form a current loop.

[0044] Specifically, after the battery cells 2 are stacked, the positive tabs 21 and negative tabs 22 of the battery cells 2 pass through the bracket body 1 and are bent in a negative-positive (series) manner. Before welding, the wider tabs are first bent and attached to the conductive sheet 3, and then the narrower tabs are attached to the wider tabs, so that the tabs connected to the same conductive sheet 3 form a stacked layer with the conductive sheet 3 in the length direction of the conductive sheet 3. During welding, the narrower tabs are welded to the overlapping parts of the wider tabs, and the wider tabs are welded to the conductive sheet 3. The former ensures good contact between the tabs of the battery cell 2, and the latter ensures good contact between the tabs and the conductive sheet 3, thereby ensuring the continuity of the battery current circuit, and avoiding the situation where multi-layer welding cannot ensure good welding of the middle layer tabs with other layers when the tabs are equal in width.

[0045] In some embodiments, the positive tab 21 and the negative tab 22 of the battery cell 2 have the same width, and the tab widths of adjacent battery cells 2 connected to the same conductive sheet 3 are different. The tab widths of the tabs connected to the same conductive sheet 3 can also be different, so that the tabs and the conductive sheet 3 are stacked in layers to ensure that the battery current circuit is connected.

[0046] In some embodiments, the positive electrode tab 21 and the negative electrode tab 22 of the battery cell 2 are cut to have different widths.

[0047] In some specific embodiments, not shown in the figures, a wiring harness integrated bracket is provided at both ends of the battery cell 2, and the positive pole tab 21 and the negative pole tab 22 of the battery cell 2 are provided at the opposite ends of the battery cell 2, and the tab channels 123 on the wiring harness integrated bracket are provided in one-to-one correspondence with the tabs of the battery cell 2.

[0048] In other specific embodiments, the positive electrode tab 21 and the negative electrode tab 22 are arranged on the same sealing edge of the battery cell 2, and a wiring harness integrated bracket is arranged at one end of the tab of the battery cell 2, and the tab channel 123 on the wiring harness integrated bracket is arranged one-to-one with the tab of the battery cell 2.

[0049] Specifically, Figure 2 As shown, the positive tab 21 and the negative tab 22 are arranged on the same sealing edge of the battery cell 2, and the width of the positive tab 21 of the battery cell 2 is cut to be greater than the width of the negative tab 22. A harness integrated bracket is arranged at one end of the tab of the battery cell 2, and the tab channel 123 on the harness integrated bracket is arranged one by one corresponding to the tab of the battery cell 2. After the battery cells 2 are stacked, the positive tab 21 and the negative tab 22 pass through the bracket and are bent in a negative-positive series manner. After bending, the negative tab 22 is attached to the positive tab 21, and the positive tab 21 is attached to the conductive sheet 3. Two welds are welded during welding, one weld is made for the superimposed part of the positive and negative tabs, and one weld is made for the positive tab 21 and the conductive sheet 3. The former ensures good contact between the positive and negative tabs, and the latter ensures good contact between the positive tab 21 and the conductive sheet 3.

[0050] In some preferred embodiments, Figure 5-8 As shown, a tab limiting portion 12 is provided on the bracket body 1 of the harness integrated bracket, and the tab channel 123 is provided on both sides of the tab limiting portion 12; a first limiting portion 122 is provided at the bottom of the bracket body 1 between adjacent tab limiting portions 12; the tab limiting portion 12 includes a support bar 121, the bottom of the support bar 121 is protruding and forms a cell limiting groove 6 with the adjacent first limiting portion 122. After the tab piece passes through the tab channel 123 of the harness integrated bracket, the tab extends higher than the CCS bracket, and the aluminum-plastic film 23 at the root of the tab piece forms a limit with the cell limiting groove 6 and no longer moves, so that the cell 2 is stable in position in the battery module, which is beneficial to protecting the cell 2 and improving the safety of the cell 2.

[0051] In some preferred embodiments, a second limiting portion 1211 is extended from the bottom of the support bar 121, and the adjacent second limiting portions 1211, the first limiting portions 122 and the bottom of the support bar 121 form a single cell limiting groove 6. Preferably, the second limiting portion 1211 and the first limiting portion 122 are flush toward one end of the cell 2. By limiting the position of a single cell 2, the position stability of the cell 2 in the module is further improved, thereby ensuring the safety of the cell 2 and even the battery module.

[0052] like Figure 5-11 As shown, in some optional embodiments, each of the support bars 121 is provided with a hollow area 124 on the surface, and the cross section of the hollow area 124 gradually decreases toward the direction of the battery cell 2. A plurality of ribs 125 are arranged in the hollow area 124, and the end surface of the rib 125 facing the conductive sheet 3 is flush with the outer edge of the hollow area 124. In this embodiment, there is no specific restriction on the shape and structure of the hollow area 124, and the hollow area 124 can be any structure that can accommodate the collection harness 4, so that the overall structure of the battery is compact and the size is reduced, which is convenient for the assembly of the voltage, current and other collection harnesses 4. In this embodiment, each of the above-mentioned support bars 121 has three hollow areas 124, which can provide independent placement space for each collection harness 4 of voltage, temperature, etc., with regular assembly, simple structure, and high overall strength of the bracket. In other embodiments, there is no specific restriction on the number of hollow areas 124, and the assembly hollow area 124 is set according to actual needs.

[0053] like Figure 5-8 As shown, in some optional embodiments, the shape of the hollow area 124 can be a "V"-shaped structure in cross section, and the overall cross section of the support bar 121 is a "Y"-shaped structure; while ensuring the structural strength of the support bar 121, the hollow area 124 can also adopt other concave structures such as a "U" shape.

[0054] Furthermore, a positioning structure is provided on the outer edge of the hollow area 124 on the support bar 121, and a limiting structure adapted to the positioning structure is provided on the conductive sheet 3. The positioning structure can be any structure that can prevent the conductive sheet 3 from shaking and facilitate the installation of the conductive sheet 3. For example, Fig.10 As shown, the positioning structure is a limiting column 126, which is a simple structure such as a round column or a square column, and is easy to manufacture; a limiting opening 31 and a limiting hole 32 that match the positioning structure are provided on the conductive sheet 3. The above positioning structure and the limiting structure cooperate to prevent the conductive sheet 3 from shaking, ensure the stability and reliability of the electrical connection, and also facilitate the installation of the conductive sheet 3, thereby improving the assembly efficiency of the battery.

[0055] Specifically, a limiting hole 32 is set at one end of the conductive sheet 3, and two limiting openings 31 are set at the other end; a limiting column 126 adapted to the limiting hole 32 is set at one end of the outer edge of the hollow area 124 on the support bar 121, and two limiting columns 126 adapted to the limiting openings 31 are set at the other end.

[0056] In other embodiments, the positioning structure may also be in other shapes, and the specific shape and position may not be specifically limited. For example, the positioning structure may also be a plurality of grooves provided on the top surface of the support bar 121, and a protrusion matching the plurality of grooves is provided on the conductive sheet 3, or the positioning structure may also be other structures capable of fixing the conductive sheet 3 on the support bar 121.

[0057] In some examples, a conductive sheet 3 accommodating space 7 may be provided on the top surface of the support bar 121 above the hollow area 124 to position, accommodate and assemble the conductive sheet 3 .

[0058] In some optional embodiments, the middle part of the support body 1 is recessed in the direction of the battery cell 2 and is provided with a strip-shaped groove to form a harness integration area 11, and the harness integration area 11 collects the harness 4; the connection end of the collection harness 4 is gathered into a thick harness, and the thick harness is connected with a harness terminal 8 and a buckle tie for fixing the harness; the collection end of the collection harness 4 can be used to collect temperature and voltage signals. Specifically, the collection end of the collection harness 4 can be connected to the conductive sheet 3 for collecting voltage signals, and can also be connected to a temperature collector for collecting the temperature of the battery cell 2. The collection harness 4 can be retained in the middle groove, which has more wire space than the PCB board solution, so it can meet the sampling of high-power and large-number modules; in some optional embodiments, the tab limiter 12 is provided with a notch on one side close to the harness integration area 11, so as to penetrate the harness integration area 11 and the hollow area 124, and the connection between the harness and the conductive sheet 3 after passing through the notch is more stable, and the space utilization rate is higher. Specifically, the notch is disposed between two limiting posts 126 on the outer edges of the hollow area 124 on the support bar 121 .

[0059] In some optional embodiments, the support body 1 is provided with a plurality of heat dissipation holes in the wiring harness integration area 11. The heat dissipation holes can improve the heat dissipation performance of the wiring harness integration area 11 and improve the safety performance of the battery. The wiring harness integration area 11 is provided with two rows of evenly arranged air holes 127.

[0060] In some examples, specific examples include Fig.10 As shown, a vent hole 127 may be provided at the tab limiting portion 12 near the edge of the bracket to further enhance the fluid performance of the air inside the battery and improve the heat dissipation performance of the battery.

[0061] In some optional embodiments, such as Figure 10-11 As shown, the two side edges of the bracket body 1 are recessed toward the battery cell 2 to form a total positive / negative integrated component placement area 9, and the total positive / negative integrated component 5 is provided in the total positive / negative integrated component placement area 9. During installation, the total positive / negative integrated component 5 is placed in the placement area, and the total positive / negative integrated component 5 is connected to the total positive electrode tab 21 or the total negative electrode tab 22 of the soft-pack battery cell 2 after the series assembly is completed.

[0062] In some optional embodiments, such as Fig.11 As shown, a boss 91 is provided in the total positive / negative integrated part placement area 9, and a glue hole 92 is provided in the boss 91. The boss 91 is used to support the total positive / negative integrated part 5, and the glue hole 92 is used to glue and bond the total positive / negative integrated part 5.

[0063] In some optional embodiments, the bracket body 1 may be a plastic part, and other structures may be designed on the bracket body 1 to facilitate the subsequent assembly of components on the part. For example, in some examples, a notch 128 is provided on the upper side wall of the bracket bar.

[0064] In some optional embodiments, the conductive sheet 3 is a series of aluminum bars, and the conductive sheet 3 can also be a metal sheet of other materials that can conduct electricity. In this embodiment, the series of aluminum bars is a square plate structure, which is placed above the support bar 121 when in use; in this technical solution, the series of aluminum bars is easy to process and simple to make, and the aluminum material has a low density, light weight, and excellent electrical and thermal conductivity, which is suitable for collecting parameters such as battery voltage and temperature.

[0065] In the description of the present invention, it should be understood that the terms "middle", "length", "width", "up", "down", "front", "back", "vertical", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0066] In the description of this specification, the description with reference to the terms "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solution recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solution from the technical solution of the embodiments of the utility model.

Claims

1. A battery module, characterized in that: include: A plurality of battery cells; a wiring harness integrated bracket, the wiring harness integrated bracket comprising a bracket body, the bracket body being penetrated by a plurality of pole ear channels; a plurality of conductive sheets, the conductive sheets being arranged above the bracket body, the pole ear sheets of the battery cells being bent through the pole ear channels and connected to the conductive sheets; wherein the pole ear sheets connected to the same conductive sheet have different widths and the width of each pole ear sheet is smaller than the length of the conductive sheet.

2. A battery module according to claim 1, characterized in that: The positive electrode tab and the negative electrode tab of the battery cell have different widths, and the positive electrode tab and the negative electrode tab are located at the same sealing edge of the battery cell.

3. A battery module according to claim 1, characterized in that: A tab limiting portion is provided on the bracket body, and the tab channel is arranged on both sides of the tab limiting portion; a first limiting portion is provided at the bottom of the bracket body between adjacent tab limiting portions; the tab limiting portion includes a support bar, and the bottom of the support bar is protruding and forms a battery cell limiting groove with the adjacent first limiting portion.

4. A battery module according to claim 3, characterized in that: A second limiting portion is extended from the bottom of the support bar, and the adjacent second limiting portion and the first limiting portion form a single battery cell limiting groove with the bottom of the support bar.

5. A battery module according to claim 3, characterized in that: A hollow area is provided on the surface of each support bar, the cross section of the hollow area gradually decreases toward the battery core, a plurality of ribs are arranged in the hollow area, and the end surface of the rib facing the conductive sheet is flush with the outer edge of the hollow area.

6. A battery module according to claim 4 or 5, characterized in that: The cross section of the support bar is "Y" shaped.

7. A battery module according to claim 5, characterized in that: A positioning structure is provided on the outer edge of the hollow area on the support bar, and a limiting structure matched with the positioning structure is provided on the conductive sheet.

8. A battery module according to claim 5, characterized in that: An accommodation space adapted to the conductive sheet is provided above the surface of the support bar.

9. A battery module according to claim 2, characterized in that: The middle part of the support body is recessed toward the direction of the battery core and is provided with a strip-shaped groove to form a wiring harness integration area, and a collection wiring harness is provided in the wiring harness integration area.

10. A battery module according to claim 9, characterized in that: The wiring harness integration area is provided with a plurality of heat dissipation holes.

11. A battery module according to claim 2, characterized in that: Both sides of the support body are recessed toward the direction of the battery core to form a total positive / negative integrated component placement area, and a total positive / negative electrode integrated component is arranged in the total positive / negative integrated component placement area.

12. A battery module according to claim 11, characterized in that: A boss is provided in the total positive / negative integrated component placement area, and a gluing hole is provided in the boss.

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