Battery module, battery pack and electric equipment

Abstract

The utility model relates to a battery module, a battery pack and electric equipment. The battery module comprises a plurality of battery cells, a busbar and a plurality of pressing plates which are arranged in a split mode, and each battery cell is provided with an electrode column; the busbar comprises a plurality of first conductive parts, and the plurality of first conductive parts and the plurality of electrode columns are in one-to-one correspondence and are fixedly connected; and each pressing plate is fixedly connected to one side, deviating from the battery cells, of the at least two first conductive parts so as to be fixedly connected with the at least two corresponding battery cells. According to the invention, the plurality of pressing plates are arranged in a split manner, each pressing plate is fixedly connected to the at least two first conductive parts, and then is fixedly connected with the at least two corresponding battery cells, so that the universality is improved, the cost is reduced, the assembly process is simplified, and the reliability is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery module, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, energy storage batteries, especially large cylindrical PHEV batteries, have a large number of cells with small spacing. The top of the cells needs to be guaranteed to have a certain strength. Based on this, a pressure plate is often set up to hold the cells together, so that the cells are connected and fixed to each other. When a cell experiences thermal runaway and tends to shift, it will not shift due to the limiting effect of other cells. This can prevent heat spread and ensure the safety of equipment and personnel.

[0003] However, there are many technical problems in the design and application of such pressure plates: From a cost perspective, current pressure plates are made using die-cutting, which leads to waste of raw materials and thus higher costs; in addition, pressure plates are customized according to specific projects, resulting in poor versatility and making them unsuitable for widespread application in different projects, which undoubtedly increases project costs. In the assembly stage, the pressure plate production line has very high requirements for tooling handling and positioning, which poses significant technical challenges to the assembly process and makes it prone to problems. Utility Model Content

[0004] This application provides a battery module, battery pack, and electrical equipment, which improves versatility, reduces costs, simplifies assembly processes, and enhances reliability, thereby at least partially solving the aforementioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a battery module is provided, comprising:

[0006] Multiple battery cells, each of which has an electrode post;

[0007] The bus includes a plurality of first conductive portions, each of which corresponds to and is fixedly connected to a plurality of electrode posts; and...

[0008] Multiple pressure plates are separately arranged, and each pressure plate is fixedly connected to at least two of the first conductive parts on the side opposite to the battery cell, so as to be fixedly connected to the corresponding at least two battery cells.

[0009] Optionally, the plurality of said cells include a plurality of cell rows arranged in a staggered manner along a first direction, and each cell row includes a plurality of cells arranged in a second direction;

[0010] The pressure plate is fixedly connected to multiple battery cells. The multiple battery cells connected to the same pressure plate are distributed in multiple adjacent sets of battery cell rows, and the battery cells distributed in two adjacent sets of battery cell rows are arranged adjacent to each other.

[0011] Optionally, the plurality of pressure plates include a first pressure plate and a second pressure plate, the first pressure plate and the second pressure plate extending in the same direction, and the first pressure plate and the second pressure plate being fixedly connected to the cells in the cell arrays of different numbers.

[0012] Optionally, the multiple cells connected to the same first pressure plate are distributed in different groups of cell rows; and / or,

[0013] The multiple cells connected to the same second pressure plate are distributed in different groups of cell rows.

[0014] Optionally, the width of the first pressure plate and / or the second pressure plate is greater than the diameter of the electrode post and smaller than the diameter of the battery cell; or,

[0015] The width of the first pressure plate and / or the second pressure plate is greater than or equal to 10 mm and less than or equal to 30 mm.

[0016] Optionally, the plurality of pressure plates include a third pressure plate, the third pressure plate comprising two plate portions extending in different directions, each plate portion being fixedly connected to at least two of the battery cells.

[0017] Optionally, the plurality of cells connected to one of the plates are distributed in the same group of cell rows; and / or,

[0018] The multiple cells connected to one of the plates are respectively distributed in different groups of cell rows.

[0019] Optionally, the width of at least one of the plate portions is greater than the diameter of the electrode post and smaller than the diameter of the battery cell; or,

[0020] The width of at least one of the plate portions is greater than or equal to 10 mm and less than or equal to 30 mm.

[0021] Optionally, the battery module further includes a cold plate disposed between two sets of the cell arrays, and the pressure plate is fixedly connected to a plurality of the cells located on both sides of the cold plate.

[0022] Optionally, the battery module includes structural adhesive, which is disposed between the first conductive portion on the side opposite to the battery cell and the pressure plate.

[0023] Optionally, the battery module further includes a connecting plate, which is fixedly connected to at least two of the pressure plates.

[0024] According to a second aspect of this application, a battery pack is provided, comprising:

[0025] Box; and,

[0026] The battery module as described in any of the preceding items is disposed within the housing.

[0027] Optionally, the battery pack further includes a foaming colloid filled between the inner wall of the housing and the pressure plate.

[0028] According to a third aspect of this application, an electrical device is provided, including a battery module as described in any of the preceding claims, or a battery pack as described in any of the preceding claims.

[0029] In the battery module of this application embodiment, multiple separately configured pressure plates replace a single large pressure plate. These separately configured pressure plates have the characteristic of being flexibly adjustable according to different project requirements, which greatly improves the versatility of the pressure plates. Furthermore, the separately configured pressure plates can be designed as standardized components, thus reducing customization requirements and facilitating wider application in various projects, thereby reducing project costs. In terms of manufacturing, the separately configured pressure plates can use strip-shaped raw materials, which are cut to meet requirements. Compared with a large pressure plate, it avoids material waste during the die-cutting process, improves the utilization rate of raw materials, and thus reduces raw material costs. From an assembly perspective, the separately configured pressure plates are smaller in size, and the requirements for tooling handling and positioning are relatively lower, which reduces the technical difficulty in the assembly process and correspondingly improves assembly efficiency. In addition, in the battery module, the first conductive part is connected to the electrode post, and the pressure plate presses on the first conductive part. This ensures the mechanical connection between the cells is fixed, and also plays a stabilizing role in the electrical connection between the cells, ensuring stable and efficient power transmission between the cells. In other words, in the battery module of this application embodiment, multiple pressure plates are separately arranged, and each pressure plate is fixedly connected to at least two first conductive parts, thereby being fixedly connected to at least two corresponding battery cells, thereby improving versatility, reducing costs, simplifying assembly processes, and improving reliability.

[0030] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0033] Figure 1 This is a perspective view of the battery module provided in an exemplary embodiment of this disclosure;

[0034] Figure 2 yes Figure 1 A three-dimensional schematic diagram of some components of the battery module;

[0035] Figure 3 yes Figure 2 A top view of some components of the battery module;

[0036] Figure 4 yes Figure 3 A top view of the pressure plate in the middle;

[0037] Figure 5 yes Figure 1 A 3D schematic diagram of the CCS component in the image;

[0038] Figure 6 yes Figure 1 A three-dimensional schematic diagram of the cold plate in the middle;

[0039] Figure 7 yes Figure 1 A top view of the battery module in the diagram;

[0040] Figure 8 yes Figure 7 A cross-sectional view of the battery module at point AA;

[0041] Figure 9 yes Figure 8 A magnified schematic diagram of part B in the image.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100. Battery module; 1. Cell; 11. Electrode post; 2. CCS module; 21. Busbar; 211. First conductive part; 212. Second conductive part; 3. Pressure plate; 31. First pressure plate; 32. Second pressure plate; 33. Third pressure plate; 331. Plate part; 4. Cold plate; 5. Structural adhesive. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0045] This application provides a battery module, a battery pack, and an electrical device. Please refer to the accompanying drawings. Figures 1 to 5 This is a schematic diagram of the battery module provided in an embodiment of this application.

[0046] See Figure 1 and Figure 2 ( Figure 2 (CCS component 2 is not shown in the image). The battery module 100 includes multiple battery cells 1, busbars 21, and multiple pressure plates 3 that are separately arranged.

[0047] Cell 1 is the basic unit of battery module 100, responsible for storing and releasing electrical energy. Each cell 1 typically has a positive electrode post 11 and a negative electrode casing.

[0048] Bus 21, as part of CCS component 2 (Cell Connection System), is an important component for connecting multiple battery cells 1. Bus 21 typically includes multiple first conductive parts 211 and multiple second conductive parts 212 (see...). Figure 5 Multiple first conductive parts 211 are correspondingly and fixedly connected to multiple electrode posts 11. Specifically, the first conductive parts 211 and the electrode posts 11 are welded to achieve positive electrode electrical connection of the battery cell 1, and multiple second conductive parts 212 are connected to the negative electrode shells of multiple battery cells 1 to achieve negative electrode electrical connection of the battery cell 1. The busbar 21 connects multiple battery cells 1 in series or in parallel, playing the role of current collection and distribution.

[0049] Each pressure plate 3 is fixedly connected to at least two first conductive parts 211 on the side opposite to the battery cell 1 (i.e., Figure 1 The upper side of the plate is fixedly connected to at least two corresponding cells 1. In this way, when a cell 1 experiences thermal runaway and tends to displace, it will not displace because it is fixedly connected to other cells 1 by a pressure plate 3 and limited by the pressure plate 3 and other cells 1. This can prevent heat spread and ensure the safety of equipment and personnel.

[0050] In the technical solution of this application, multiple separately configured pressure plates 3 are used to replace a single large pressure plate 3. These separately configured pressure plates 3 have the characteristic of being flexibly adjustable according to different project requirements, which greatly improves the versatility of the pressure plate 3. Furthermore, the separately configured pressure plates 3 can be designed as standardized components, thus reducing customization requirements and facilitating wider application in various projects, thereby reducing project costs. In terms of manufacturing, the separately configured pressure plates 3 can use strip-shaped raw materials, which are cut to meet requirements. Compared with the large pressure plate 3, it avoids material waste during the die-cutting process, improves the utilization rate of raw materials, and thus reduces raw material costs. From an assembly perspective, the separately configured pressure plates 3 are smaller in size, and the requirements for tooling handling and positioning are relatively lower, which reduces the technical difficulty in the assembly process and correspondingly improves assembly efficiency. In addition, in the battery module 100, the first conductive part 211 is connected to the electrode post 11, and the pressure plate 3 presses on the first conductive part 211 (see details...). Figure 9The pressure plate 3, the first conductive part 211, and the electrode post 11 are arranged sequentially from top to bottom. This ensures the mechanical connection between the cells 1 is fixed, and also stabilizes the electrical connection between the cells 1, ensuring stable and efficient power transmission between the cells 1. In other words, in the battery module 100 of this application embodiment, multiple pressure plates 3 are separately arranged, each pressure plate 3 is fixedly connected to at least two first conductive parts 211, and thus fixedly connected to at least two corresponding cells 1, thereby improving versatility, reducing costs, simplifying assembly processes, and improving reliability.

[0051] In some embodiments, see Figure 3 Multiple battery cells 1 include multiple sets of battery cell rows arranged in an alternating manner along a first direction. Figure 3 The diagram illustrates five groups, each group of cell rows including multiple cells 1 arranged along a second direction; a pressure plate 3 is fixedly connected to multiple cells 1, and multiple cells 1 connected to the same pressure plate 3 are distributed in multiple adjacent groups of cell rows, with cells 1 in adjacent groups of cell rows arranged adjacently. In these embodiments, multiple groups of cell rows are arranged along a first direction and staggered. The staggered arrangement can reduce the gaps between cells 1, improve space utilization within the limited space of the battery module 100, and help improve the overall energy density of the battery module 100. By connecting adjacent cells 1 in adjacent groups of cell rows together, the length and complexity of the pressure plate 3 can be significantly reduced, thereby simplifying the manufacturing and assembly process.

[0052] In some embodiments, see Figure 3 and Figure 4 The multiple pressure plates 3 include a first pressure plate 31 and a second pressure plate 32. The first pressure plate 31 and the second pressure plate 32 extend in the same direction. The first pressure plate 31 and the second pressure plate 32 are respectively fixedly connected to the battery cells 1 in different groups of battery cell arrays. In these embodiments, the first pressure plate 31 and the second pressure plate 32 extend in the same direction and are fixedly connected to the cells 1 in different groups of cell rows. It is understood that the lengths (dimensions in the extension direction) of the first pressure plate 31 and the second pressure plate 32 are different, which determines the number of cell rows they can connect. The longer pressure plate 3 connects to more groups of cell rows, while the shorter pressure plate 3 connects to fewer groups of cell rows. For example, the first pressure plate 31 connects to the cells 1 in two groups of cell rows, while the second pressure plate 32 connects to the cells 1 in four or five groups of cell rows. By using pressure plates 3 of different lengths, the battery module 100 can better adapt to different cell 1 layout requirements. No matter how the number of cell rows or the number of cells 1 in each cell row changes, effective cell 1 connection can be achieved by adjusting the length and number of pressure plates 3, thereby meeting the needs of battery modules 100 of various sizes.

[0053] This application does not limit the number of cells 1 connected to the same pressure plate 3 (first pressure plate 31 or second pressure plate 32) in the same cell array. Specifically, if the width (dimension in the direction perpendicular to the extension direction) of the first pressure plate 31 or the second pressure plate 32 is wider, more cells 1 can be connected in the width direction. That is, two or more adjacent cells 1 in each cell array can be connected to the same pressure plate 3 (first pressure plate 31 or second pressure plate 32).

[0054] In some embodiments, see Appendix Figure 3 Multiple battery cells 1 connected to the same first pressure plate 31 are distributed in different groups of cell rows; and / or, multiple battery cells 1 connected to the same second pressure plate 32 are distributed in different groups of cell rows. That is, the width of the first pressure plate 31 or the second pressure plate 32 is relatively narrow, and multiple battery cells 1 connected to the same pressure plate 3 (first pressure plate 31 or second pressure plate 32) are distributed in different groups of cell rows. This means that only one battery cell 1 in each group of cell rows is connected to the same pressure plate 3. This precise connection method can be accurately matched according to the specific arrangement and layout of the battery cells 1, improving the design flexibility of the battery module 100.

[0055] In some embodiments, the width of the first pressure plate 31 and / or the second pressure plate 32 is greater than the diameter of the electrode post 11 and less than the diameter of the battery cell 1. In these embodiments, the width of the pressure plate 3 (first pressure plate 31 or second pressure plate 32) is greater than the diameter of the electrode post 11, ensuring that the pressure plate 3 can completely cover and firmly fix the electrode post 11. This design allows the pressure plate 3 to achieve a stable connection by pressing on the first conductive part 211 fixed to the top of the electrode post 11, thereby ensuring reliable fixation between the battery cell 1 and the pressure plate 3. The width of the pressure plate 3 is less than the diameter of the battery cell 1, which can prevent the pressure plate 3 from excessively covering the surface of the battery cell 1, reducing the obstruction area, avoiding affecting the filling and function of other key components (such as foam adhesive), ensuring the rationality and effectiveness of the internal layout of the battery module 100, and improving the overall performance and reliability.

[0056] In some embodiments, the width of the first pressure plate 31 and / or the second pressure plate 32 is greater than or equal to 10 mm and less than or equal to 30 mm. In these embodiments, the lower limit of the width is 10 mm to ensure that the pressure plate 3 (the first pressure plate 31 or the second pressure plate 32) has sufficient coverage area to stably fix the electrode post 11 and the first conductive part 211 at its top, thereby ensuring a reliable connection between the cell 1 and the pressure plate 3; the upper limit of the width is 30 mm, which can meet the layout requirements of most cell arrays, and will not obstruct too much of the surface of the cell 1 due to the excessive width of the pressure plate 3, thus affecting the arrangement of other components (such as foam) inside the battery module 100. By limiting the width of the first pressure plate 31 and / or the second pressure plate 32 to between 10 mm and 30 mm, a stable connection between the cell 1 and the pressure plate 3 is ensured, the space utilization of the battery module 100 is optimized, and the overall performance and reliability are improved.

[0057] In some embodiments, continue reading Figure 3 and Figure 4 The multiple pressure plates 3 include a third pressure plate 33, which comprises two plate portions 331 extending in different directions. Each plate portion 331 is fixedly connected to at least two battery cells 1. In these embodiments, the third pressure plate 33 includes two plate portions 331 extending in different directions, a structure that better conforms to the layout of the battery cells 1. Since the battery cells 1 are arranged with different orientations and layout characteristics, the two plate portions 331 extending in different directions can adapt to the distribution of battery cells 1 in different directions. For example, at the corner of the battery module 100, this pressure plate 3 with plate portions 331 extending in different directions can span the arrangement of battery cells 1 in different directions and be fixedly connected to at least two battery cells 1 in at least two directions, improving the adaptability of the pressure plate 3 to the layout of the battery cells 1. Each plate portion 331 is fixedly connected to at least two battery cells 1, thus fixing the battery cells 1 from two different extension directions. This multi-directional fixing method can enhance the connection stability between the battery cells 1, better resist external forces from different directions, and reduce the possibility of displacement between the battery cells 1.

[0058] This application does not limit the width (dimension in the direction perpendicular to the extension direction) of the plate portion 331 of the third pressure plate 33. Specifically, if the width of the plate portion 331 is wider, more battery cells 1 can be connected in the width direction.

[0059] In some embodiments, see Appendix Figure 3 Multiple battery cells 1 connected to a single plate portion 331 are distributed in the same group of cell rows; and / or, multiple battery cells 1 connected to a single plate portion 331 are distributed in different groups of cell rows. That is, the width of the plate portion 331 of the third pressure plate 33 is relatively narrow, and only one battery cell 1 is connected in the width direction. This precise connection method can be accurately matched according to the specific arrangement and layout of the battery cells 1, improving the design flexibility of the battery module 100.

[0060] In some embodiments, the width of at least one plate portion 331 is greater than the diameter of the electrode post 11 and less than the diameter of the battery cell 1. In these embodiments, the width of the plate portion 331 (one plate portion 331 or two plate portions 331) is greater than the diameter of the electrode post 11, ensuring that the plate portion 331 can completely cover and firmly fix the electrode post 11. This design allows the pressure plate 3 to achieve a stable connection by pressing it against the first conductive part 211 fixed to the top of the electrode post 11, thereby ensuring reliable fixation between the battery cell 1 and the pressure plate 3. The width of the plate portion 331 is less than the diameter of the battery cell 1, which can prevent the pressure plate 3 from excessively covering the surface of the battery cell 1, reducing the obstruction area, avoiding affecting the filling and function of other key components (such as foam adhesive), ensuring the rationality and effectiveness of the internal layout of the battery module 100, and improving the overall performance and reliability.

[0061] In some embodiments, the width of at least one plate portion 331 is greater than or equal to 10 mm and less than or equal to 30 mm. In these embodiments, the lower limit of the width is 10 mm to ensure that the plate portion 331 has sufficient coverage area to stably fix the electrode post 11 and the first conductive part 211 at its top, thereby ensuring a reliable connection between the cell 1 and the pressure plate 3; the upper limit of the width is 30 mm, which can meet the layout requirements of most cell arrays, and will not obstruct too much of the surface of the cell 1 due to the excessive width of the plate portion 331, thus affecting the arrangement of other components (such as foam) inside the battery module 100. By limiting the width of one or two plate portions 331 to between 10 mm and 30 mm, a stable connection between the cell 1 and the pressure plate 3 is ensured, the space utilization of the battery module 100 is optimized, and the overall performance and reliability are improved.

[0062] In some embodiments, see Figure 3 The battery module 100 also includes a cold plate 4, which is disposed between two sets of cell rows. A pressure plate 3 is fixedly connected to multiple cells 1 located on both sides of the cold plate 4. In these embodiments, the cold plate 4, disposed between the two sets of cell rows, can cool the cells 1, which helps maintain the cells 1 within a suitable operating temperature range, improving the performance and safety of the battery module 100. The cold plate 4 also provides thermal isolation, reducing the propagation of thermal runaway between cell rows. When a cell 1 on one side of the cold plate 4 experiences thermal runaway, the probability of a cell 1 on the other side of the cold plate 4 experiencing thermal runaway is lower. Therefore, the fixed connection of the pressure plate 3 to multiple cells 1 located on both sides of the cold plate 4 reduces the probability of thermal runaway of a certain cell 1 through the pressure plate 3 to other connected cells 1. This allows the pressure plate 3 and the un-runaway cells 1 to limit the displacement of the thermally runaway cell 1, thus more effectively preventing heat propagation and ensuring equipment and personnel safety. Specifically, see... Figure 6The cold plate 4 is a serpentine cold plate 4. Thermally conductive structural adhesive is used to fix the battery cell 1 and the cold plate 4. One cold plate 4 is arranged on each side of each battery cell array (see below). Figure 3 The sprues between the cold plates 4 are connected by expansion joints using nylon corrugated pipes to form a liquid cooling circuit.

[0063] In some embodiments, see Figure 7 , Figure 8 and Figure 9 The battery module 100 includes structural adhesive 5, which is disposed between the side of the first conductive portion 211 facing away from the cell 1 and the pressure plate 3. In these embodiments, the structural adhesive 5 is disposed between the side of the first conductive portion 211 facing away from the cell 1 and the pressure plate 3 to enhance the fixed connection between the pressure plate 3 and the first conductive portion 211. The structural adhesive 5 can fill any small gaps that may exist between them, making their connection tighter. Compared with a purely mechanical connection method, the use of structural adhesive 5 can provide additional adhesive force, reducing the possibility of the pressure plate 3 and the first conductive portion 211 loosening or separating when the battery module 100 is subjected to external forces such as vibration and impact, thereby improving the safety and reliability of the battery module 100.

[0064] In some embodiments, the battery module 100 further includes a connecting plate (not shown in the figure), which is fixedly connected to at least two pressure plates 3. In these embodiments, since the connecting plate connects at least two pressure plates 3 together, and the pressure plates 3 are fixedly connected to at least two battery cells 1, more battery cells 1 are connected in this indirect way. This helps to integrate multiple dispersed battery cells 1 into a more integrated structure, enhances the structural stability of the entire battery module 100, better protects the connection between battery cells 1, reduces the risk of loosening or disconnection of battery cell 1 connection under external interference (such as thermal runaway of a battery cell 1 with displacement tendency, vibration, collision, etc.), avoids displacement of battery cells 1, ensures that the connection between battery cells 1 always remains in good condition, ensures the normal operation of the battery module 100, and improves the safety and reliability of the battery module 100.

[0065] According to a second aspect of this application, a battery pack is provided, including a housing and a battery module 100. The structure of the battery module 100 is as described above. The battery module 100 is disposed inside the housing. Since the battery pack adopts all the technical solutions of all the above embodiments, it has at least the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0066] In some embodiments, the battery pack further includes a foaming compound filled between the inner wall of the housing and the pressure plate 3. It is understood that when using foaming compound to fix the battery cell 1, a single large pressure plate in related technologies may block the overflow hole, preventing the foaming compound from flowing smoothly to the predetermined position and affecting the fixing effect between the battery cells 1. In these embodiments, multiple separately arranged pressure plates 3 help to avoid the overflow hole, allowing the foaming compound to flow between the multiple pressure plates 3 to the predetermined position, thereby better fixing the battery cell 1 and ensuring the stability and safety of the battery module 100 under various operating conditions.

[0067] According to a third aspect of this application, an electrical device is provided, including a battery module 100 or a battery pack. The structure of the battery module 100 or battery pack is as described above. Since the electrical device adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. This application does not specifically limit the type of electrical device, which includes, but is not limited to, vehicles, energy storage power supplies, consumer electronics, medical devices, smart cities, etc.

[0068] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0070] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0071] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery module, characterized by, The battery module comprises: a plurality of battery cells, each of which has an electrode post; a busbar comprising a plurality of first conductive parts, each of which is in one-to-one correspondence with and fixedly connected to one of the electrode posts; and a plurality of pressure plates, each of which is fixedly connected to at least two first conductive parts on a side thereof away from the battery cells. The plurality of battery cells comprises a plurality of groups of battery cell rows arranged along a first direction and staggered, each group of battery cell rows comprising a plurality of battery cells arranged along a second direction; 2. The battery module of claim 1, wherein, The pressure plates are fixedly connected to the plurality of battery cells, the plurality of battery cells connected to the same pressure plate are distributed in a plurality of groups of battery cell rows arranged adjacently, and the battery cells distributed in adjacent two groups of battery cell rows are arranged adjacently. The plurality of pressure plates comprises a first pressure plate and a second pressure plate, the first pressure plate and the second pressure plate extend along the same direction, and the first pressure plate and the second pressure plate are respectively fixedly connected to the battery cells in different groups of battery cell rows.

3. The battery module of claim 2, wherein, The plurality of battery cells connected to the same first pressure plate are respectively distributed in different groups of battery cell rows; and / or 4. The battery module of claim 3, wherein, The plurality of battery cells connected to the same second pressure plate are respectively distributed in different groups of battery cell rows. The width of the first pressure plate and / or the second pressure plate is greater than the diameter of the electrode post and less than the diameter of the battery cell; or 5. The battery module of claim 4, wherein, The width of the first pressure plate and / or the second pressure plate is greater than or equal to 10 mm and less than or equal to 30 mm. The plurality of pressure plates comprises a third pressure plate, the third pressure plate comprises two plate parts extending in different directions, and each of the plate parts is fixedly connected to at least two battery cells.

6. The battery module of claim 2, wherein, The plurality of battery cells connected to one of the plate parts are distributed in the same group of battery cell rows; and / or 7. The battery module of claim 6, wherein, The plurality of battery cells connected to one of the plate parts are respectively distributed in different groups of battery cell rows. The width of at least one of the plate parts is greater than the diameter of the electrode post and less than the diameter of the battery cell; or 8. The battery module of claim 7, wherein, The width of at least one of the plate parts is greater than or equal to 10 mm and less than or equal to 30 mm. The battery module further comprises a cold plate arranged between two groups of battery cell rows, and the pressure plates are fixedly connected to the plurality of battery cells located on both sides of the cold plate.

9. The battery module of claim 2, wherein, The battery module comprises structural glue arranged between the side of the first conductive part away from the battery cells and the pressure plates.

10. The battery module of any one of claims 1-9, wherein, The battery module further comprises a connecting plate fixedly connected to at least two pressure plates.

11. The battery module of any one of claims 1-9, wherein, The battery pack comprises:

12. A battery pack, characterized by, a box body; and The battery module as claimed in any one of claims 1-11 is arranged in the box body. The battery pack further comprises foamed glue filled between the inner wall of the box body and the pressure plates. The battery module as claimed in any one of claims 1-11 or the battery pack as claimed in claim 12 or 13.

13. The battery pack of claim 12, wherein, ​ 14. An electrical device, characterized by ​

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