Integrated busbar assembly and battery module

Abstract

An integrated busbar assembly (3) and a battery module. The integrated busbar assembly (3) comprises: an integrated support (31), comprising a first surface (311) and a second surface (312) arranged opposite to each other, wherein a profiling recess group (313) arranged opposite to support recesses (211) is formed in the first surface (311), a placement recess group (314) is formed in the second surface (312), the profiling recess group (313) is in communication with the placement recess group (314), and a plurality of battery cells (22) have two ends respectively fixed in the profiling recess group (313) and the support recesses (211); and a busbar assembly (32) fixed in the placement recess group (314) and electrically connected to the plurality of battery cells (22).

Description

Integrated busbar components and battery modules

[0001] This application claims priority to two Chinese patent applications filed with the China Patent Office on October 30, 2023, with application numbers 202311426472.9 and 202322927561.3. The entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to an integrated busbar assembly and a battery module. Background Art

[0003] The battery cells inside prismatic power batteries are all square, and during use, the sides of the batteries are prone to swelling. To address this, related technologies use cylindrical battery cells to form battery packs, effectively preventing battery swelling. The fixed installation of multiple cylindrical battery cells is typically accomplished using a combination of cylindrically contoured plates, end plates, and steel strips. SUMMARY OF THE INVENTION

[0004] The structure in which multiple cylindrical battery cells are fixed with cylindrical-shaped plates, end plates and steel strips is relatively complex and difficult to assemble.

[0005] In a first aspect, the present application provides an integrated busbar assembly configured to cooperate with a cell holder to fix a plurality of single cells, the cell holder having a plurality of holder slots, the integrated busbar assembly comprising:

[0006] The integrated bracket includes a first surface and a second surface that are arranged opposite to each other. The first surface is provided with a contoured groove group arranged opposite to the bracket groove. The second surface is provided with a placement groove group. The contoured groove group is connected to the placement groove group. Two ends of multiple single cells are respectively fixed in the contoured groove group and the bracket groove.

[0007] The busbar assembly is fixed in the placement slot group and is electrically connected to the plurality of single battery cells, so that the plurality of single battery cells are electrically connected to each other.

[0008] In a second aspect, the present application provides a battery module, comprising:

[0009] The box body is provided with a receiving cavity;

[0010] The battery cell module is arranged in the accommodating cavity;

[0011] An integrated busbar assembly is provided on the top of the box and is electrically connected to the battery module;

[0012] A box cover, which is arranged on the top of the box body;

[0013] A battery management module is provided on a side of the box cover facing the box body and is electrically connected to the integrated busbar assembly through a connecting harness;

[0014] The integrated busbar assembly is configured to cooperate with a cell holder to fix a plurality of single cells, the cell holder is provided with a plurality of holder slots, and the integrated busbar assembly includes:

[0015] The integrated bracket includes a first surface and a second surface that are arranged opposite to each other, wherein the first surface is provided with a contoured groove group arranged opposite to the bracket groove, and the second surface is provided with a placement groove group, wherein the contoured groove group is connected to the placement groove group, and the ends of the plurality of single cells are respectively fixed in the contoured groove group and the bracket groove;

[0016] The busbar assembly is fixed in the placement slot group and is electrically connected to the plurality of single battery cells, so that the plurality of single battery cells are electrically connected to each other. Beneficial effects

[0017] The present application provides an integrated busbar assembly and battery module, which mainly utilizes an integrated bracket in conjunction with a cell bracket to confine and fix multiple single cells between the integrated bracket and the cell bracket. Compared with the use of cylindrical contoured plates and end plates to fix multiple single cells, the structure is simpler, the volume is smaller, and the fixed installation is simpler and more convenient. Specifically, the invention primarily involves providing a plurality of support slots on a cell support and providing a profiled slot group on a first surface of the integrated support, which is arranged opposite the support slots. This allows the individual cells to be positioned and fixed by placing their ends within the profiled slot group and the support slot, respectively. The entire process requires only placing the individual cells within the support slots and then aligning the profiled slot group on the integrated support with the individual cells for installation. The installation process is simple and quick, and the profiled slot group on the integrated support and the support slot on the cell support only need to be provided according to the diameter of the cells. Compared to using cylindrical profiled plates and end plates, the structure is simpler and easier to process. The accuracy requirements for profiled mounting are also lower, and there is no need to block and fix the entire side of the individual cells. Consequently, the integrated support and the cell support are also smaller in size. Furthermore, by arranging a busbar assembly within the placement slot group, when the integrated support secures the individual cells, the busbar assembly on the integrated support is simultaneously electrically connected to the individual cells, eliminating the need for separate wiring to achieve electrical connection of multiple individual cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic structural diagram of an integrated busbar assembly and a battery cell module provided by the present application;

[0019] FIG2 is a schematic structural diagram of an integrated busbar assembly provided by the present application;

[0020] FIG3 is a schematic diagram of the explosion structure of FIG2 ;

[0021] FIG4 is a schematic structural diagram of an integrated bracket provided by the present application (first perspective);

[0022] FIG5 is a schematic structural diagram of an integrated bracket provided by the present application (second viewing angle);

[0023] FIG6 is a schematic structural diagram of a battery module provided in this application;

[0024] FIG7 is a schematic diagram of the explosion structure of the battery module provided in this application.

[0025] Description of reference numerals:

[0026] 1. Box body; 11. Accommodation cavity; 12. Positioning column; 13. Accommodation part; 14. Base; 15. Mounting part; 151. First mounting column; 152. Second mounting column; 2. Battery cell module; 21. Battery cell bracket; 211. Bracket slot; 22. Single battery cell; 3. Integrated busbar assembly; 31. Integrated bracket; 311. First surface; 312. Second surface; 313. Contoured slot group; 3131. Contoured slot; 314. Placement slot group; 3141. First placement slot; 3142. Second placement slot; 315. Heat dissipation gap; 316. Positioning hole; 317. Mounting ear; 318. Mounting position; 32. Busbar assembly; 321. Total positive busbar; 322. Total negative busbar; 323. Series busbar; 4. Box cover; 5. Battery management module; 51. Avoidance position; 6. Connecting wire harness. Modes for Carrying Out the Invention

[0027] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0028] In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." The following description is provided to enable any person skilled in the art to make and use the present application. In the following description, details are listed for the purpose of explanation.

[0029] In the related art, battery modules are composed of multiple square cells. Combining multiple square cells into a battery module is beneficial for saving costs and improving the energy density of the battery. However, the use of square cells also has some problems. For example, the square cells will expand during use, and the battery module is composed of multiple cells, that is, multiple cells will expand. The expansion of the cells is not conducive to the normal use of the cells. In addition, the expansion of multiple cells can easily squeeze the components near the cells, causing damage to the components or cells, and even causing other dangers. To this end, multiple side plates are generally used to surround the cells, and then they are tied with steel strips to achieve the purpose of suppressing the expansion of the square cells. However, this solution will increase the complexity of battery module production and assembly, as well as the complexity and volume of the battery module itself. It has not yet solved the root cause of cell expansion, that is, it only suppresses cell expansion, rather than eliminating cell expansion. Therefore, in some technologies, the square cells are replaced with cylindrical cells to completely eliminate the problem of square cell expansion. However, because cylindrical cells and square cells are completely different in structure, cylindrical cells cannot be used with the installation and fixing structure used for square cells, and the installation and fixing structure needs to be redesigned for cylindrical cells. In related technologies, cylindrical cells are mainly surrounded by cylindrical shaped plates, and then the cylindrical cells are initially fixed by using end plates and plates. Steel belt grooves are opened on the side of the cylindrical shaped plates, and the steel belts are bundled along the steel belt grooves to complete the fixed installation. Such installation has a complex structure and is not conducive to the heat dissipation of the cylindrical cells. It also has high requirements for process assembly, such as: the setting of the steel belt cannot be tilted. Specifically, the angle between the steel belt and the end plate cannot be greater than 1°, otherwise it will affect the fixation reliability of the cylindrical cells. When conducting battery vibration tests, the steel belt may fall off.

[0030] In view of the problems existing in the above-mentioned fixed installation method, referring to Figures 1 to 5, an embodiment of the present application provides an integrated busbar assembly 3 for cooperating with a cell holder 21 to fix multiple single cells 22. The cell holder 21 has multiple holder slots 211. The integrated busbar assembly 3 includes:

[0031] The integrated bracket 31 includes a first surface 311 and a second surface 312 that are arranged opposite each other. The first surface 311 defines a contoured groove group 313 that is arranged opposite to the bracket groove 211. The second surface 312 defines a placement groove group 314. The contoured groove group 313 communicates with the placement groove group 314. The ends of the plurality of single cells 22 are respectively fixed in the contoured groove group 313 and the bracket groove 211.

[0032] The busbar assembly 32 is fixed in the placement slot assembly 314 and is electrically connected to the plurality of single battery cells 22 , so that the plurality of single battery cells 22 are electrically connected to each other.

[0033] The technical solution provided in the embodiment of the present application is mainly to confine and fix multiple single battery cells 22 between the integrated bracket 31 and the battery cell bracket 21 by utilizing the integrated bracket 31 and the battery cell bracket 21. Compared with using cylindrical profiling plates and end plates to fix multiple single battery cells 22, the structure is simpler, the volume is smaller, and the fixing and installation is simpler and more convenient. In detail, it is mainly through opening a plurality of bracket grooves 211 on the battery cell holder 21, and opening a profiling groove group 313 arranged opposite to the bracket groove 211 on the first surface 311 of the integrated holder 31, so that the two ends of the single battery cell 22 are respectively arranged in the profiling groove group 313 and the bracket groove 211, so as to achieve the limitation and fixation of the single battery cell 22. The whole process only requires placing the single battery cell 22 into the bracket groove 211, and then aligning the profiling groove group 313 on the integrated holder 31 with the single battery cell 22 for installation to achieve the fixation of the battery cell. The installation process is simple and fast. The profiling groove group 313 on the integrated holder 31 and the bracket groove 211 on the battery cell holder 21 only need to be opened according to the diameter of the battery cell. Compared with the use of cylindrical profiling plates and end plates, the structure is simpler and the processing is easier. The accuracy requirement for profiling is also lower. There is no need to block and fix the entire side of the single battery cell 22. Therefore, the volume of the integrated holder 31 and the battery cell holder 21 is also smaller. In addition, by setting the busbar assembly 32 in the placement slot group 314, when the integrated bracket 31 fixes the single battery cell 22, the busbar assembly 32 arranged on the integrated bracket 31 is also electrically connected to the single battery cell 22 at the same time, and there is no need to connect wires separately, thereby realizing the electrical connection of multiple single battery cells 22.

[0034] It should be noted that the main structure of the integrated bracket 31 is a plate of a certain thickness. The depth of the contoured groove group 313 depends on the thickness of the integrated bracket 31. The deeper the depth, the better the securing effect of the individual battery cells 22. However, as the depth increases, the difficulty of securing the battery cells increases, and the heat dissipation effect of the battery cells gradually decreases. Those skilled in the art can reasonably select the thickness of the integrated bracket 31 and the depth of the contoured groove group 313 based on actual conditions. No limitation is imposed herein, as long as the contoured groove group 313 can confine the portion of the end of the individual battery cell 22 facing away from the bracket groove 211 within the contoured groove 3131.

[0035] Referring to Figures 3 and 4, in some embodiments, the contoured groove group 313 includes a plurality of contoured grooves 3131. The integrated bracket 31 is rectangular, with its first surface 311 having a length direction and a width direction perpendicular to the length direction. The contoured grooves 3131 are arranged in rows and columns, with the length direction corresponding to the rows of contoured grooves 3131 and the width direction corresponding to the columns of contoured grooves 3131. The contoured grooves 3131 in adjacent rows are staggered. This arrangement maximizes the number of contoured grooves 3131 within the limited area of ​​the first surface 311, improving space utilization and facilitating connection between the individual cells 22 located within the contoured grooves 3131. The contoured grooves 3131 are shaped identically to the cross-section of the individual cells 22 in the axial direction, facilitating insertion of one end of the individual cells 22 into the contoured grooves 3131.

[0036] Furthermore, a plurality of weight-reducing grooves 3111 are provided on the first surface 311 to reduce the weight of the integrated bracket 31 .

[0037] In some embodiments, the side of the integrated bracket 31 is provided with a plurality of heat dissipation gaps 315, and the contoured grooves 3131 provided adjacent to the side of the integrated bracket 31 are connected to the heat dissipation gaps 315. The contoured grooves 3131 are connected to each other, and the contoured grooves 3131 located at the edge of the integrated bracket 31 are further connected to the heat dissipation gaps 315, thereby enabling heat transfer from the single cells 22 within the plurality of contoured grooves 3131 and conducting the heat to the outside of the integrated bracket 31 through the heat dissipation gaps 315.

[0038] It should be noted that, in this embodiment, an interference fit is employed between the contoured groove 3131 and the individual battery cells 22. When inserting one end of the individual battery cell 22 into the contoured groove 3131, a certain amount of squeezing force is required to insert the individual battery cell 22 into the contoured groove 3131, which helps to improve the stability and convenience of securing the individual battery cell 22 within the contoured groove 3131. In addition to the interference fit, the individual battery cell 22 and the contoured groove 3131 can also be secured by gluing or welding to further secure the individual battery cell 22 within the contoured groove 3131. In this case, the interference fit also serves a positioning function.

[0039] In some embodiments, referring to Figures 3 to 5 , the placement slot group 314 includes a plurality of first placement slots 3141 and a plurality of second placement slots 3142. Each first placement slot 3141 communicates with two contoured slots 3131, and each second placement slot 3142 communicates with one contoured slot 3131. A first placement slot 3141 communicates with two contoured slots 3131 primarily to allow the battery cells 22 within the two contoured slots 3131 to be connected via the busbar assembly 32. A second placement slot 3142 communicates with a contoured slot 3131 primarily to allow the battery cells 22 within that contoured slot 3131 to be connected to other components via the busbar assembly 32. The first placement slots 3141 and second placement slots 3142 are spaced apart, as are the plurality of first placement slots 3141. In this embodiment, the two second placement slots 3142 are arranged opposite each other along the width of the first surface 311. Of course, in some other embodiments, the plurality of second placement slots 3142 may also be arranged in other ways, which are not limited and are specifically set according to the wiring, the structure of the integrated bracket 31 and other external conditions.

[0040] In some embodiments, referring to Figures 2 and 3, the busbar assembly 32 includes a total positive busbar 321, a total negative busbar 322, and a plurality of series busbars 323. The total positive busbar 321 is arranged in a second placement slot 3142, and the total negative busbar 322 is arranged in another second placement slot 3142. One end of the total positive busbar 321 extends toward the side away from the second placement slot 3142, and is mainly used for fixing with other components. Similarly, one end of the total negative busbar 322 extends toward the side away from the second placement slot 3142, and is also used for fixing with other components. Multiple series busbars 323 are arranged in multiple first placement slots 3141, thereby realizing the series connection of multiple single battery cells 22.

[0041] It should be noted that the series bus 323 is used to connect multiple single cells 22 included in a battery module in series, that is, to connect the positive and negative electrodes of multiple single cells 22 together in a designed series manner. Specifically, it can be connected (for example, welded) with the positive poles (that is, the positive pole at the center position of the top of the single cell 22 cover) or the negative electrode cover (that is, the other separated areas on the top of the single cell 22 shell except the positive pole position) of multiple single cells 22; the positive pole of any single cell 22 in the battery module can be connected to the negative electrode cover of other single cells 22 through the series bus 323 to achieve series connection, that is, to achieve the positive and negative electrodes of the single cell 22 being connected in sequence; when there are multiple single cells 22, the specific connection method of the series connection and the order of connection of the single cells 22 are various, which are existing well-known technologies and will not be repeated here.

[0042] In addition, the total negative bus 322 and the total positive bus 321 are respectively used to connect the negative output head end and the positive output tail end of the plurality of single battery cells 22 connected in series by the series bus 323 .

[0043] It should be noted that after a battery module is equipped with the integrated busbar assembly 3 of the present application, the two external busbars connected to the integrated busbar assembly 3 can be connected in series and parallel with other battery modules 2 to form a battery system. Of course, it can also be connected to the positive and negative electrodes of the load to power the load.

[0044] It should be noted that a load is a device that receives electrical energy in a circuit and is a general term for various electrical appliances. For example, common loads include air conditioners, electric motors in electric vehicles, and other electrical devices that consume power.

[0045] In this embodiment, the connection between the main positive busbar 321, the main negative busbar 322, and the multiple serial busbars 323 and the first placement slot 3141 or the second placement slot 3142 is achieved by hot melt fixing. Specifically, the main positive busbar 321, the main negative busbar 322, and the multiple serial busbars 323 are each provided with hot melt holes, and hot melt posts are provided on the first placement slot 3141 and the second placement slot 3142. The main positive busbar 321, the main negative busbar 322, and the multiple serial busbars 323 are each fitted with hot melt posts through their respective hot melt holes and confined in the corresponding first placement slot 3141 and the second placement slot 3142. The main positive busbar 321, the main negative busbar 322, and the multiple serial busbars 323 are then completely fixed in the corresponding first placement slot 3141 and the second placement slot 3142 by welding. The inner walls of the first placement groove 3141 and the second placement groove 3142 and the hot melt column can play a positioning role and a fool-proof effect for the fixed installation process of the bus assembly 32, thereby preventing the total positive bus 321, the total negative bus 322 and multiple series buses 323 from being misplaced.

[0046] Referring to Figures 6 and 7 , this application also provides a battery module, which is primarily used to integrate batteries and transmit battery power to the outside, provide electrical connection ports for external devices, protect the batteries, and increase the battery's energy density. The battery module includes:

[0047] The box body 1 is provided with a receiving cavity 11;

[0048] The battery cell module 2 is disposed in the accommodating cavity 11;

[0049] The integrated busbar assembly 3 as described in any of the above embodiments is provided on the top of the box 1 and is electrically connected to the battery module 2;

[0050] A box cover 4 is provided on the top of the box body 1;

[0051] The battery management module 5 is provided on the side of the box cover 4 facing the box body 1 and is electrically connected to the integrated busbar assembly 3 through a connecting harness 6 .

[0052] Thus configured, the battery module provided by this embodiment can effectively alleviate the technical issues of complex mounting structures and difficult assembly of multiple cylindrical battery cells in a cylindrical battery pack. The derivation process for this beneficial effect is generally similar to that of the aforementioned integrated busbar assembly 3 and will not be repeated here.

[0053] It should be noted that the battery module 2 includes a battery holder 21 and a plurality of single battery cells 22. A plurality of holder slots 211 are provided on the battery holder 21, and the ends of the multiple single battery cells 22 facing away from the integrated holder 31 are respectively inserted into the corresponding holder slots 211. The correspondence here means that one single battery cell 22 is inserted into one holder slot 211. The fit between the single battery cell 22 and the holder slot 211 adopts an interference fit, which is the same as the fit and fixing method between the single battery cell 22 and the contoured slot 3131, and is welded or glued. The beneficial effects will not be repeated here. Each holder slot 211 corresponds to a contoured slot 3131 one by one, and each holder slot 211 is coaxially arranged with the corresponding contoured slot 3131 to ensure that the single battery cell 22 will not tilt when fixedly installed. The fixing method of the battery holder 21 and the box body 1 can be welding or gluing, without limitation. As for the box cover 4, the connection between it and the box body 1 is fixed by bolts, and a sealing ring can be set between the box body 1 and the box cover 4 to improve the sealing of the connection between the box body 1 and the box cover 4. As for the battery management module 5, it mainly includes a monitoring unit, which is responsible for real-time monitoring of key parameters of the battery, such as voltage, current, temperature, etc.; a control unit, which is responsible for managing the charging and discharging process of the battery and performing safety functions such as power-off protection and temperature control; an equalizer, which is used to implement balanced charging to ensure that the charge state between battery cells is similar; a communication interface, which is mainly responsible for communicating with other systems, such as vehicle management systems, energy management systems or monitoring centers, etc. The communication interface can be wired or wireless for real-time data transmission; fuses and circuit breakers, which are used to provide additional battery protection to prevent situations such as excessive current or short circuit; battery connectors and wires, which are used to connect to battery cells to monitor and manage their performance. The battery management module 5 is a prior art and will not be described in detail here.

[0054] In some embodiments, the cell module 2 includes multiple individual cells 22 and a cell holder 21. The ends of the individual cells 22 facing away from the integrated busbar assembly 3 are respectively fixed within multiple holder slots 211. The sides of the cell holders 21 facing away from the individual cells 22 are fixed to the bottom of the accommodating cavity 11. In this embodiment, the individual cells 22 are fixed to the holder slots 211 using adhesive curing. Specifically, adhesive can be applied to the inner walls of the holder slots 211, and then the individual cells 22 are inserted into the holder slots 211 and the adhesive is cured. The cell holders 21 are also fixed to the bottom of the accommodating cavity 11 using adhesive curing.

[0055] In some embodiments, a positioning post 12 is provided on the top of the housing 1, and a positioning hole 316 is provided on the integrated bracket 31. The positioning post 12 cooperates with the positioning hole 316 to achieve positioning and pre-fixation of the integrated bracket 31. The term "cooperation between the positioning post 12 and the positioning hole 316" refers to the fact that when the integrated bracket 31 is installed on the housing 1, the positioning hole 316 of the integrated bracket 31 is aligned with the positioning post 12, and the positioning post 12 then passes through the positioning hole 316, completing positioning and pre-fixation.

[0056] In some embodiments, two positioning posts 12 and two positioning holes 316 are provided. The two positioning posts 12 are arranged opposite each other along the diagonal of the housing 1. Similarly, the positioning holes 316 are arranged opposite each other along the diagonal of the integrated bracket 31. Therefore, only two positioning posts 12 need to cooperate with the positioning holes 316 to achieve pre-fixation of the integrated bracket 31 in the horizontal direction, minimizing the structure and cooperation required for positioning.

[0057] Furthermore, in some embodiments, three positioning posts 12 may be provided, and correspondingly, three positioning holes 316 may also be provided. The three positioning posts 12 are respectively provided at or near the three corners of the housing 1. Similarly, the three positioning holes 316 are respectively provided at or near the three corners of the integrated bracket 31. Each positioning hole 316 is provided corresponding to a positioning post 12. When the integrated bracket 31 is fixedly installed on the housing 1, the cooperation between the positioning posts 12 and the positioning holes 316 can not only perform positioning and pre-fixing functions, but also serve as a foolproof function, preventing the fixing position between the integrated bracket 31 and the housing 1 from being incorrect.

[0058] In addition to the above-mentioned solution in which the positioning column 12 is provided on the box body 1 and the positioning hole 316 is opened on the integrated bracket 31, in some embodiments, the positioning column 12 can also be provided on the integrated bracket 31, and the positioning hole 316 is opened on the box body 1. Each positioning column 12 corresponds to a positioning hole 316, so that the positioning column 12 can be inserted into the positioning hole 316, thereby realizing the positioning connection between the box body 1 and the integrated bracket 31.

[0059] In some embodiments, there are multiple connecting wire harnesses 6. One end of each of the multiple connecting wire harnesses 6 is electrically connected to the battery management module 5, and the other end is electrically connected to the bus assembly 32. Specifically, the multiple connecting wire harnesses 6 are electrically connected to the total positive bus 321, the total negative bus 322, and the series bus 323 in the bus assembly 32. The connection method is welding, that is, the connecting wire harness 6 is welded to the bus assembly 32, which can eliminate the need to connect to the main bus harness. The ends of the multiple branch wire harnesses that are away from the main bus harness are electrically connected to the bus assembly 32. On the path where the multiple connecting wire harnesses 6 are connected to the battery management module 5, a wire harness wrapping tube can also be provided, and the multiple connecting wire harnesses 6 all pass through the wire harness wrapping tube, thereby avoiding the messy distribution of the multiple connecting wire harnesses 6.

[0060] It should be noted that, in this embodiment, the cross-sectional area of ​​the connecting harness 6 is 0.22 mm 2 . The thickness of the series busbar 323 , the total positive busbar 321 , and the total negative busbar 322 are all 0.5 mm.

[0061] In some embodiments, a sealing ring is provided between the box lid 4 and the box body 1 to improve the waterproof and insulating properties of the battery module. The box lid 4 is provided with an output positive electrode, an output negative electrode, a communication interface, and a vent valve. Both the output positive electrode and the output negative electrode are connected to the battery management module 5, and each is provided with a waterproof cover to cover the output positive electrode and the output negative electrode for waterproofing, insulation, and protection. The communication interface is primarily used to connect an external device or system to the battery module to enable information transmission. The vent valve is primarily used to dissipate heat.

[0062] Referring to Figures 6 and 7 , in some embodiments, the housing 1 includes a housing portion 13 defining an accommodating cavity 11, a base 14, and a mounting portion 15. Along the axial direction of the individual battery cells 22, the base 14 and mounting portion 15 are located on either side of the housing portion 13 and are integrally connected thereto. Furthermore, when projected along the axial direction of the individual battery cells 22, the projected outline of the housing portion 13 lies within the projected outlines of the base 14 and mounting portion 15. By making the projected outline areas of the base 14 and mounting portion 15 larger than the projected outline areas of the housing portion 13, the area in which the housing 1 can be placed can be increased, thereby improving the stability of the housing 1 and enhancing the overall strength of the housing 1.

[0063] Further, referring to Figure 7, the integrated bracket 31 includes a plurality of lugs 317, and the plurality of lugs 317 are provided on the first surface 311 and arranged circumferentially along the edge of the first surface 311. The number of lugs 317 and the specific positions along the edge can be selected according to actual conditions. In this embodiment, because the mounting portion 15 is rectangular, the number of lugs 317 is four, and they are respectively located at the four corners of the rectangle. A plurality of first mounting posts 151 are provided on the mounting portion 15, and the side of the lug 317 facing away from the first surface 311 extends toward the first mounting post 151 and is connected to the first mounting post 151. The connection method is that a threaded hole is provided on the first mounting post 151, and a connecting hole is provided on the lug 317, and the connection between the integrated bracket 31 and the box body 1 is achieved by passing a bolt through the connecting hole and threading it into the threaded hole. The hanging ear 317 is provided on the first surface 311 mainly to make the connection position between the hanging ear 317 and the mounting portion 15 higher than the first surface 311. The side of the hanging ear 317 away from the first surface 311 extends toward the first mounting column 151 mainly to adapt to the extension of the mounting portion 15 toward the side away from the accommodating portion 13, forming a flared structure.

[0064] Furthermore, the mounting portion 15 is provided with a second mounting post 152, to which the battery management module 5 is secured. The second mounting post 152 is taller than the first mounting post 151, thereby spacing the battery management module 5 from the integrated bracket 31. The height here refers to the distance from the second mounting post 152 and the first mounting post 151, respectively, facing away from the mounting portion 15, to the plane of the integrated bracket 31, when both the second mounting portion 15 and the first mounting portion 15 are mounted on the same plane of the mounting portion 15. By limiting the height of the second mounting post 152 to a higher height than the first mounting post 151 and ensuring that the mounting lug 317 connects to the housing 1 at a higher level than the first surface 311, a certain spacing is created between the battery management module 5 and the integrated bracket 31, providing electrical protection for the battery management module 5 and preventing damage from direct contact between the battery management module 5 and the integrated bracket 31.

[0065] In some embodiments, the integrated bracket 31 includes multiple lugs 317, which are connected to the housing 1 or the housing cover 4. In this embodiment, the lugs 317 are connected to the housing 1 by bolts. The multiple lugs 317 enclose a mounting position 318. Specifically, four lugs 317 are located at the four corners of the housing 1, thereby enclosing a rectangular mounting position 318. The battery management module 5 is located in this mounting position 318 and on the side of the busbar assembly 32 facing away from the integrated bracket 31. This facilitates efficient use of space resources and minimizes the size of the battery module. Furthermore, the battery management module 5 is provided with multiple avoidance positions 51, projected along the integrated bracket 31 toward the battery management module 5. Each lug 317 is projected within a avoidance position 51, effectively preventing the battery management module 5 from contacting the lugs 317 during installation, which could cause electrical problems. This also makes the internal structure of the battery module more compact.

[0066] The battery module in this embodiment can be used as a power battery for new energy vehicles, new energy working machinery, etc.

[0067] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0068] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise stated, "about", "approximately" or "substantially" indicate that the numbers allow for ±% changes. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining the digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the settings of such numerical values ​​are as accurate as possible within the feasible range.

Claims

1. An integrated busbar assembly, configured to cooperate with a cell support to fix a plurality of single cells, the cell support having a plurality of support slots, the integrated busbar assembly comprising: The integrated bracket comprises a first surface and a second surface which are arranged opposite to each other, wherein the first surface is provided with a profiling groove group which is arranged opposite to the bracket groove, and the second surface is provided with a placement groove group, wherein the profiling groove group is connected with the placement groove group, and two ends of the plurality of single cells are respectively fixed in the profiling groove group and the bracket groove; The busbar assembly is fixed in the placement slot group and is electrically connected to the plurality of single cells so that the plurality of single cells are electrically connected to each other.

2. The integrated busbar assembly according to claim 1, wherein: The profiling groove group includes a plurality of profiling grooves, the first surface has a length direction and a width direction perpendicular to the length direction, the plurality of profiling grooves are arranged in rows and columns, the length direction corresponds to the row direction of the plurality of profiling grooves, the width direction corresponds to the column direction of the plurality of profiling grooves, and the profiling grooves in two adjacent rows are staggered.

3. The integrated busbar assembly according to claim 1, wherein: The profiling groove group includes a plurality of profiling grooves, a plurality of heat dissipation gaps are formed on the side of the integrated bracket, and the profiling grooves arranged adjacent to the side of the integrated bracket are communicated with the heat dissipation gaps. 4 . The integrated busbar assembly according to claim 1 , wherein the contoured groove group comprises a plurality of contoured grooves, and the contoured grooves are interference fit with the single battery cells.

5. The integrated busbar assembly according to any one of claims 1 to 4, wherein: The profiling slot group includes a plurality of profiling slots, and the placement slot group includes a plurality of first placement slots and a plurality of second placement slots, each of the first placement slots is connected to two of the profiling slots, and each of the second placement slots is connected to one of the profiling slots.

6. The integrated busbar assembly according to claim 5, wherein: The bus assembly includes a total positive bus, a total negative bus and multiple series busses, the total positive bus is arranged in one of the second placement slots, the total negative bus is arranged in another of the second placement slots, and the multiple series busses are arranged in the multiple first placement slots.

7. A battery module, comprising: The box body is provided with a containing cavity; A battery cell module is disposed in the accommodating cavity; An integrated busbar assembly is disposed on the top of the box and is electrically connected to the battery module; A box cover, which is arranged on the top of the box body; A battery management module is disposed on a side of the box cover facing the box body and is electrically connected to the integrated busbar assembly through a connecting harness; The integrated busbar assembly is configured to cooperate with a cell support to fix a plurality of single cells, the cell support is provided with a plurality of support slots, and the integrated busbar assembly includes: The integrated bracket comprises a first surface and a second surface which are arranged opposite to each other, wherein the first surface is provided with a profiling groove group which is arranged opposite to the bracket groove, and the second surface is provided with a placement groove group, wherein the profiling groove group is connected with the placement groove group, and two ends of the plurality of single cells are respectively fixed in the profiling groove group and the bracket groove; The busbar assembly is fixed in the placement slot group and is electrically connected to the plurality of single cells so that the plurality of single cells are electrically connected to each other.

8. The battery module according to claim 7, wherein: The cell module comprises a plurality of single cells and a cell bracket, wherein ends of the single cells facing away from the integrated busbar assembly are respectively fixed in a plurality of bracket grooves, and a side of the cell bracket facing away from the single cells is fixed to the bottom of the accommodating cavity.

9. The battery module according to claim 7, wherein: The box body is provided with a positioning column, and the integrated bracket is provided with a positioning hole. The positioning column cooperates with the positioning hole to realize the positioning of the integrated bracket and the box body.

10. The battery module according to claim 9, wherein: There are three positioning posts, which are respectively located at three corners of the top of the box body. There are three positioning holes opened in the integrated bracket, which are matched with the three positioning posts.

11. The battery module according to claim 7, wherein: The box body is provided with a positioning hole, and the integrated bracket is provided with a positioning column, and the positioning column cooperates with the positioning hole to realize the positioning of the integrated bracket and the box body.

12. The battery module according to any one of claims 7 to 11, wherein: There are multiple connecting wire harnesses, one end of each of which is electrically connected to the battery management module, and the other end of each of which is electrically connected to the busbar assembly.

13. The battery module according to any one of claims 7 to 12, wherein: The box body includes a accommodating portion with the accommodating cavity, a base and a mounting portion. Along the axial direction of the single battery cell, the base and the mounting portion are respectively connected to two sides of the accommodating portion, and projected along the axial direction of the single battery cell, the projection outline of the accommodating portion is located within the projection outline of the base and the mounting portion.

14. The battery module according to claim 13, wherein: The integrated bracket includes a plurality of hanging ears, which are arranged on the first surface and circumferentially arranged along the edge of the first surface. The mounting portion is provided with a plurality of first mounting posts, and the side of the hanging ears away from the first surface extends toward the first mounting posts and is connected to the first mounting posts.

15. The battery module according to claim 14, wherein: The mounting portion is further provided with a second mounting column, the battery management module is fixed on the second mounting column, and the height of the second mounting column is higher than the first mounting column, so that the battery management module is spaced apart from the integrated bracket.

16. The battery module according to any one of claims 7 to 12, wherein: The integrated bracket includes a plurality of hanging ears, which are connected to the box body or the box cover, and the plurality of hanging ears enclose a mounting position. The battery management module is arranged at the mounting position and is located on the side of the bus assembly away from the integrated bracket, and the battery management module is provided with a plurality of avoidance positions, which are projected along the integrated bracket toward the battery management module, and the projection of each hanging ear is located in one of the avoidance positions.

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