Battery cell module and battery pack

Abstract

The utility model relates to the technical field of energy storage, and provides a battery cell module and a battery pack, and the battery cell module comprises a plurality of battery cells stacked along a first direction, an integrated busbar and a plurality of busbars. The integrated busbar is provided with a plurality of electrode holes; the electrode surfaces of the plurality of battery cells are connected with the integrated busbar; the positions of the electrode holes are in one-to-one correspondence with the positions of the electrodes. Each busbar is located at the position of two adjacent electrode holes in the first direction; two protruding connecting parts are arranged on the face, close to the electrodes, of the busbar at intervals. The number relation between the protruding height h of the protruding connecting part and the depth H of the electrode hole is that h is larger than 0 mm and smaller than or equal to H; the two convex connecting parts are respectively inserted into the two adjacent electrode holes along the first direction, so that the two convex connecting parts are respectively connected with the two adjacent electrodes along the first direction. Therefore, the busbar can be reliably connected with electrodes with different shapes and sizes. And meanwhile, poor contact between the busbars and the electrodes can be avoided, so that the battery cell module is more stable in operation.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, specifically to a cell module and battery pack. Background Technology

[0002] A battery cell module is a common energy storage unit, which includes multiple battery cells arranged in sequence, an integrated busbar, and multiple aluminum bars.

[0003] An integrated busbar is positioned above the electrode sides of multiple battery cells. This integrated busbar has electrode holes at the electrode positions of the battery cells, and an aluminum bar is positioned above the electrode holes. The electrodes of adjacent battery cells are connected in series via the aluminum bar. In the production of battery cell modules, cells with cylindrical electrodes are generally used. The electrode holes on this integrated busbar are circular, with dimensions adapted to the cylindrical electrodes. Thus, during the assembly of the battery cell module, the aluminum bar is positioned above the electrode holes, and the corresponding electrodes are inserted into these electrode holes from bottom to top, so that the end faces of the electrodes connect with the aluminum bar.

[0004] However, during the production process, sometimes battery cells with square electrodes are used. These square electrodes are too large to be inserted into the electrode hole from bottom to top, resulting in the aluminum battery not connecting to the square electrode. Even if the aluminum battery is connected to the square electrode, poor contact may occur, leading to instability in the battery cell module's operation. Utility Model Content

[0005] This application provides a battery cell module and battery pack. Each busbar of the battery cell module is located at the position of two adjacent electrode holes along a first direction. Two protruding connecting portions are spaced apart on the side of the busbar near the electrode. The relationship between the protrusion height h of the protruding connecting portions and the depth H of the electrode holes is: 0 mm < h ≤ H. The two protruding connecting portions are respectively inserted into the two adjacent electrode holes along the first direction, so that the two protruding connecting portions are respectively connected to the two adjacent electrodes along the first direction. In this way, the integrated busbar of the battery cell module can be adapted to electrodes of different shapes and sizes, enabling reliable connection between the busbar and electrodes of different shapes and sizes, thus increasing the applicability of the integrated busbar. It also avoids poor contact between the busbar and the electrodes, thus making the battery cell module operate more stably.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] In a first aspect, this application provides a battery cell module, comprising: a plurality of battery cells stacked along a first direction, an integrated busbar, and a plurality of busbars. Each battery cell has two electrodes spaced apart on its electrode surface along a second direction, wherein the first direction and the second direction are perpendicular. The integrated busbar has a plurality of electrode holes; the electrode surfaces of the plurality of battery cells are all connected to the integrated busbar; the positions of the electrode holes correspond one-to-one with the positions of the electrodes.

[0008] Each busbar is located at the position of two adjacent electrode holes along the first direction; two protruding connecting portions are provided at intervals on the side of the busbar near the electrode; the protrusion height h of the protruding connecting portion and the depth H of the electrode hole are related as follows: 0mm < h ≤ H; the two protruding connecting portions are respectively inserted into the two adjacent electrode holes along the first direction, so that the two protruding connecting portions are respectively connected to the two adjacent electrodes along the first direction.

[0009] As an optional implementation, the two protruding connecting portions have the same shape and size, and the protrusion height h of the protruding connecting portion is equal to the depth H of the electrode hole.

[0010] As an optional implementation, the protrusion height h of the protrusion connection is in the range of 0.2mm≤h≤0.8mm.

[0011] As an optional implementation, the protrusion height h of the protruding connection is 0.5 mm.

[0012] As an optional implementation, both the protruding surface of the protruding connector and the end face of the electrode are planar, and the protruding surface is welded to the end face.

[0013] As an optional implementation, the busbar has a recess on the side opposite to the protruding connection portion, so that the thickness is the same at all locations on the busbar.

[0014] As an optional implementation, the protruding connecting part is cylindrical in shape, and the protrusion direction is parallel to the axial direction of the cylinder; the electrode hole is a circular hole, and the size of the circular hole is adapted to that of the cylinder.

[0015] As an optional implementation, the busbar is a rectangular aluminum busbar, and the long side of the rectangular aluminum busbar is parallel to the first direction.

[0016] As an optional implementation, the rectangular aluminum bar has a buffer structure between the two protruding connecting portions, so that the length of the rectangular aluminum bar along the first direction is adjustable.

[0017] As an optional implementation, the buffer structure includes a resilient raised rib; the rectangular aluminum bar protrudes in a direction away from the electrode to form the raised rib, the axial direction of the raised rib being parallel to the second direction.

[0018] Secondly, this application provides a battery pack, the battery pack including the cell module and battery housing as described in any of the first aspects above, the cell module being located inside the battery housing.

[0019] Compared with the prior art, the beneficial effects of this application are at least as follows:

[0020] The battery module comprises multiple battery cells stacked along a first direction, an integrated busbar, and multiple busbars. Each battery cell has two electrodes spaced apart along a second direction, with the first and second directions perpendicular. This arrangement of multiple battery cells is perpendicular to the arrangement of the two electrodes on the same cell, facilitating the connection of adjacent battery cells in series along the first direction by each busbar. The multiple battery cells are used to store electrical energy, achieving the purpose of energy storage.

[0021] Because the integrated busbar has multiple electrode holes, the electrode surfaces of multiple battery cells are all connected to the integrated busbar, and the positions of the electrode holes correspond one-to-one with the positions of the electrodes. This facilitates that each electrode can be electrically connected to the busbar through an electrode hole, thus further facilitating the connection of two adjacent battery cells in series.

[0022] Each busbar is located at the position of two adjacent electrode holes along the first direction; two protruding connecting parts are provided at intervals on the side of the busbar near the electrode; the relationship between the protrusion height h of the protruding connecting parts and the depth H of the electrode hole is: 0mm < h ≤ H; the two protruding connecting parts are respectively inserted into the two adjacent electrode holes along the first direction, so that the two protruding connecting parts are respectively connected to the two adjacent electrodes along the first direction. In this way, the integrated busbar of the battery cell module can be adapted to electrodes of different shapes and sizes, so that the busbar can reliably connect to electrodes of different shapes and sizes, thus increasing the applicability of the integrated busbar. At the same time, it can also avoid poor contact between the busbar and the electrode, thus making the battery cell module operate more stably. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1This is a schematic diagram of the structure of a battery cell module provided in an embodiment of this application;

[0025] Figure 2 for Figure 1 Exploded view of the core module of China Electronics Technology Group Corporation (CETC).

[0026] Figure 3 for Figure 2 A cross-sectional view of the integrated busbar after it has been cut along the locations of multiple busbars;

[0027] Figure 4 for Figure 3 A magnified view of a section at point D.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100-Battery cell module, 110-Battery cell, 111-Electrode surface, 112-Electrode, 1121-End face, 120-Integrated busbar, 121-Electrode hole, 130-Busbar, 131-Protruding connection, 1311-Protruding surface, 132-Recessed part, 133-Buffer structure, 1331-Protruding rib. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] A battery cell module is a common energy storage unit, comprising multiple battery cells arranged in sequence, an integrated busbar, and multiple aluminum bars. The integrated busbar is positioned above the electrode sides of the multiple battery cells, and electrode holes are provided on the integrated busbar at the electrode positions of the battery cells. An aluminum bar is positioned above the electrode holes, and the electrodes of adjacent battery cells are connected in series via the aluminum bars. In the production of battery cell modules, battery cells with cylindrical electrodes are generally used. The electrode holes on the integrated busbar are circular, with a size adapted to the cylindrical electrodes. Thus, during the assembly of the battery cell module, the aluminum bars are positioned above the electrode holes, and the corresponding electrodes are inserted into these electrode holes from bottom to top, so that the end faces of the electrodes connect with the aluminum bars.

[0032] However, during the production process, sometimes battery cells with square electrodes are used. These square electrodes are too large to be inserted into the electrode hole from bottom to top, resulting in the aluminum battery not connecting to the square electrode. Even if the aluminum battery is connected to the square electrode, poor contact may occur, leading to instability in the battery cell module's operation.

[0033] To address the aforementioned technical problems, the battery cell module provided by this invention solves these problems by providing two protruding connecting portions at intervals on the side of the busbar near the electrodes. Specifically, the battery cell module includes multiple battery cells stacked along a first direction, an integrated busbar, and multiple busbars. Each battery cell has two electrodes spaced apart on its electrode surface along a second direction, with the first and second directions perpendicular to each other. This arrangement of the multiple battery cells is perpendicular to the arrangement of the two electrodes on the same battery cell, facilitating the connection of adjacent battery cells in series along the first direction by each busbar. The multiple battery cells are used to store electrical energy, achieving the purpose of energy storage.

[0034] Because the integrated busbar has multiple electrode holes, the electrode surfaces of multiple battery cells are all connected to the integrated busbar, and the positions of the electrode holes correspond one-to-one with the positions of the electrodes. This facilitates that each electrode can be electrically connected to the busbar through an electrode hole, thus further facilitating the connection of two adjacent battery cells in series.

[0035] Each busbar is located at the position of two adjacent electrode holes along the first direction; two protruding connecting parts are provided at intervals on the side of the busbar near the electrode; the relationship between the protrusion height h of the protruding connecting parts and the depth H of the electrode hole is: 0mm < h ≤ H; the two protruding connecting parts are respectively inserted into the two adjacent electrode holes along the first direction, so that the two protruding connecting parts are respectively connected to the two adjacent electrodes along the first direction. In this way, the integrated busbar of the battery cell module can be adapted to electrodes of different shapes and sizes, so that the busbar can reliably connect to electrodes of different shapes and sizes, thus increasing the applicability of the integrated busbar. At the same time, it can also avoid poor contact between the busbar and the electrode, thus making the battery cell module operate more stably.

[0036] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0037] The following provides a detailed description of the specific structure of the aforementioned battery cell module and various possible implementation methods.

[0038] Figure 1 This is a schematic diagram of the structure of a battery cell module 100 provided in an embodiment of this application. Figure 2 for Figure 1 Exploded view of the Zhongdian Cell Module 100 Figure 3 for Figure 2The cross-sectional view formed by cutting the integrated busbar 120 along the locations of the multiple busbars 130. Figure 4 for Figure 3 A magnified view of a section at point D.

[0039] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The battery cell module 100 includes multiple cells along a first direction ( Figure 1 The battery cells 110, integrated busbar 120, and multiple busbars 130 are stacked in the second direction (X direction). The electrode surface 111 of each battery cell 110 is along the second direction (X direction). Figure 1 Two electrodes 112 are spaced apart in the Y direction, with the first and second directions perpendicular to each other. The integrated busbar 120 is provided with multiple electrode holes 121; the electrode surfaces 111 of multiple cells 110 are all connected to the integrated busbar 120; the positions of the electrode holes 121 correspond one-to-one with the positions of the electrodes 112.

[0040] Each busbar 130 is located at the position of two adjacent electrode holes 121 along the first direction; two protruding connecting portions 131 are provided at intervals on the side of the busbar 130 near the electrode 112; the protrusion height h of the protruding connecting portion 131 and the depth H of the electrode hole 121 are related as follows: 0mm<h≤H; the two protruding connecting portions 131 are respectively inserted into the two adjacent electrode holes 121 along the first direction, so that the two protruding connecting portions 131 are respectively connected to the two adjacent electrodes 112 along the first direction.

[0041] In this embodiment, the battery module 100 includes multiple battery cells 110 stacked along a first direction, an integrated busbar 120, and multiple busbars 130. Each battery cell 110 has two electrodes 112 spaced apart on its electrode surface 111 along a second direction, with the first and second directions perpendicular to each other. This arrangement of the multiple battery cells 110 is perpendicular to the arrangement of the two electrodes 112 on the same battery cell 110, facilitating the connection of adjacent battery cells 110 in series along the first direction by each busbar 130. The multiple battery cells 110 are used to store electrical energy to achieve energy storage.

[0042] Because the integrated busbar 120 is provided with multiple electrode holes 121; the electrode surfaces 111 of multiple battery cells 110 are all connected to the integrated busbar 120; the positions of the electrode holes 121 correspond one-to-one with the positions of the electrodes 112. This facilitates that each electrode 112 can be electrically connected to the busbar 130 through an electrode hole 121, thus further facilitating the busbar 130 to connect two adjacent battery cells 110 in series.

[0043] Since each busbar 130 is located at the position of two adjacent electrode holes 121 along the first direction; two protruding connecting portions 131 are provided at intervals on the side of the busbar 130 near the electrode 112; the relationship between the protrusion height h of the protruding connecting portion 131 and the depth H of the electrode hole 121 is: 0mm < h ≤ H; the two protruding connecting portions 131 are respectively inserted into the two adjacent electrode holes 121 along the first direction, so that the two protruding connecting portions 131 are respectively connected to the two adjacent electrodes 112 along the first direction. In this way, the integrated busbar 120 of the battery cell module 100 can be adapted to electrodes 112 of different shapes and sizes, so that the busbar 130 can be reliably connected to electrodes 112 of different shapes and sizes, thus increasing the applicability of the integrated busbar 120. At the same time, it can also avoid poor contact between the busbar 130 and the electrode 112, thus making the operation of the battery cell module 100 more stable.

[0044] It should be noted that all the multiple battery cells 110 can be square battery cells of the same model, and the multiple battery cells 110 are arranged in two rows along the first direction; the two rows of battery cells 110 have the same number and are connected side by side along the second direction; the positive terminal of one battery cell 110 and the negative terminal of the adjacent battery cell 110 along the first direction are respectively connected to two protruding connecting portions 131 of the same busbar 130. The number of battery cells 110 can be two, three or more, and this embodiment does not limit this.

[0045] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The two protruding connecting parts 131 have the same shape and size, and the protrusion height h of the protruding connecting part 131 is equal to the depth H of the electrode hole 121.

[0046] In this way, both protruding connecting parts 131 can completely penetrate the corresponding electrode holes 121. Even if the electrode 112 is too large to be inserted into the electrode hole 121, the protruding surfaces 1311 of the two protruding connecting parts 131 can still abut against the end face 1121 of the corresponding electrode 112, thereby ensuring a reliable connection between the busbar 130 and the electrode 112. This further avoids the occurrence of poor contact between the busbar 130 and the electrode 112, making the operation of the battery cell module 100 more stable.

[0047] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The value range of the protrusion height h of the protrusion connection 131 is 0.2mm≤h≤0.8mm.

[0048] In the existing battery module 100, the thickness H of the integrated busbar 120 ranges from 0.2mm ≤ H ≤ 0.8mm. Based on the design of this integrated busbar 120, setting the protrusion height h of the protrusion connection 131 to a range of 0.2mm ≤ h ≤ 0.8mm allows the protrusion height of the protrusion connection 131 to better match the electrode hole 121 provided on the integrated busbar 120.

[0049] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The protrusion height h of the protruding connecting part 131 is 0.5mm.

[0050] Tests have shown that when the thickness H of the integrated busbar 120 is 0.5mm, it can maximize material savings and reduce the volume of the battery module 100 while ensuring the structural strength of the integrated busbar 120. Based on the thickness of the integrated busbar 120, the protrusion height h of the protruding connection part 131 is set to 0.5mm, which can better match the thickness of the integrated busbar 120, thus maximizing material savings and reducing the volume of the battery module 100.

[0051] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The raised surface 1311 of the raised connecting part 131 and the end face 1121 of the electrode 112 are both flat, and the raised surface 1311 is welded to the end face 1121.

[0052] In this embodiment, both the protruding surface 1311 of the protruding connecting portion 131 and the end face 1121 of the electrode 112 are planar. When the protruding surface 1311 and the end face 1121 are connected, it is beneficial to increase the connection area between the protruding connecting portion 131 and the electrode 112, thereby reducing the connection resistance between the bus 130 and the electrode 112. Therefore, it not only reduces power loss but also helps reduce the heat generation of the battery cell module 100.

[0053] Since the raised surface 1311 is welded to the end face 1121, the connection between the busbar 130 and the electrode 112 is more secure compared to other types of connection methods, thus making the structure of the battery cell module 100 more stable.

[0054] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4The busbar 130 has a recessed portion 132 on the side opposite to the protruding connecting portion 131 so that the thickness is the same at all positions on the busbar 130.

[0055] With the thickness of the busbar 130 remaining constant along the direction of current flow, and consequently its cross-sectional area also remaining constant, the resistance distribution of the busbar 130 is more uniform. This not only prevents localized heating of the busbar 130 but also facilitates current conduction. Furthermore, compared to a design without the recess 132, providing the recess 132 on the side of the busbar 130 opposite to the protruding connecting portion 131 reduces the amount of material used in the busbar 130, thereby lowering the production cost of the battery module 100.

[0056] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The protruding connecting part 131 is cylindrical in shape, and the protrusion direction is parallel to the axis of the cylinder; the electrode hole 121 is a circular hole, and the size of the circular hole and the cylinder are matched.

[0057] In the existing battery cell module 100, the electrode 112 of the battery cell 110 is generally a cylindrical terminal, and the circular end face 1121 of the terminal is used to connect with the protruding surface 1311 of the protruding connection portion 131. Based on the shape of the terminal, the protruding connection portion 131 is set to be cylindrical, with the protrusion direction parallel to the axis of the cylinder. This helps to increase the connection area between the protruding connection portion 131 and the terminal, thereby reducing the connection resistance between the bus 130 and the electrode 112. Therefore, it not only reduces power loss, but also helps to reduce the heat generation of the battery cell module 100.

[0058] Since the electrode hole 121 is a circular hole, it can be perfectly matched with the cylindrical protruding connecting part 131. Because the dimensions of the circular hole and the cylinder are compatible, when the protruding connecting part 131 is inserted into the electrode hole 121, it can prevent the protruding connecting part 131 from moving radially along the electrode hole 121, thereby limiting the busbar 130 and making the structure of the battery cell module 100 more stable.

[0059] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 Busbar 130 is a rectangular aluminum busbar, and the long side of the rectangular aluminum busbar is parallel to the first direction.

[0060] Since multiple battery cells 110 are stacked along a first direction, and the two electrodes 112 of each battery cell 110 are spaced apart along a second direction, with the first and second directions perpendicular to each other, the busbar 130 connects two adjacent electrodes 112 along the first direction. Based on the above, the busbar 130 is configured as a rectangular aluminum bar, with its long side parallel to the first direction, which facilitates reliable connection of two adjacent electrodes 112 along the first direction.

[0061] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The rectangular aluminum bar has a buffer structure 133 between the two protruding connecting parts 131 so that the length of the rectangular aluminum bar along the first direction is adjustable.

[0062] When the volume of the battery cell 110 expands along the first direction, the rectangular aluminum bar can lengthen through the buffer structure 133 to accommodate the volume change of the battery cell 110. This prevents the rectangular aluminum bar from cracking due to tensile force, thus improving the structural stability of the battery cell module 100.

[0063] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The buffer structure 133 includes an elastic protruding rib 1331; a rectangular aluminum bar protrudes in a direction away from the electrode 112 to form the protruding rib 1331, and the axial direction of the protruding rib 1331 is parallel to the second direction.

[0064] Thus, the opening of the raised rib 1331 is located on the side of the busbar 130 near the electrode 112. When the volume of the battery cell 110 expands along the first direction, the size of the opening of the raised rib 1331 along the first direction increases, thereby increasing the length of the rectangular aluminum bar along the first direction, which can accommodate the volume change of the battery cell 110. In addition, since the structure of the raised rib 1331 is relatively simple, it can be directly formed by machine tool stamping, thus reducing the production cost of the busbar 130 and improving the production efficiency of the busbar 130.

[0065] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This application embodiment also provides a battery pack, which includes any of the above-mentioned cell modules 100 and a battery housing, with the cell modules 100 located inside the battery housing.

[0066] In this embodiment, the battery module 100 includes multiple battery cells 110 stacked along a first direction, an integrated busbar 120, and multiple busbars 130. Each battery cell 110 has two electrodes 112 spaced apart on its electrode surface 111 along a second direction, with the first and second directions perpendicular to each other. This arrangement of the multiple battery cells 110 is perpendicular to the arrangement of the two electrodes 112 on the same battery cell 110, facilitating the connection of adjacent battery cells 110 in series along the first direction by each busbar 130. The multiple battery cells 110 are used to store electrical energy to achieve energy storage.

[0067] Because the integrated busbar 120 is provided with multiple electrode holes 121; the electrode surfaces 111 of multiple battery cells 110 are all connected to the integrated busbar 120; the positions of the electrode holes 121 correspond one-to-one with the positions of the electrodes 112. This facilitates that each electrode 112 can be electrically connected to the busbar 130 through an electrode hole 121, thus further facilitating the busbar 130 to connect two adjacent battery cells 110 in series.

[0068] Since each busbar 130 is located at the position of two adjacent electrode holes 121 along the first direction; two protruding connecting portions 131 are provided at intervals on the side of the busbar 130 near the electrode 112; the relationship between the protrusion height h of the protruding connecting portion 131 and the depth H of the electrode hole 121 is: 0mm < h ≤ H; the two protruding connecting portions 131 are respectively inserted into the two adjacent electrode holes 121 along the first direction, so that the two protruding connecting portions 131 are respectively connected to the two adjacent electrodes 112 along the first direction. In this way, the integrated busbar 120 of the battery cell module 100 can be adapted to electrodes 112 of different shapes and sizes, so that the busbar 130 can be reliably connected to electrodes 112 of different shapes and sizes, thus increasing the applicability of the integrated busbar 120. At the same time, it can also avoid poor contact between the busbar 130 and the electrode 112, thus making the operation of the battery cell module 100 more stable.

[0069] Furthermore, the battery casing protects the cell module 100 from external damage, thus extending the lifespan of the cell module 100 and consequently the lifespan of the battery pack.

[0070] It should be noted that the number of cell modules 100 included in the above-mentioned battery pack can be one or four, or other numbers, and this application embodiment does not limit this.

[0071] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0072] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0073] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something,” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “above something” or “on top of something,” but also “on something” or “on top of something” without an intermediate feature or layer therebetween, i.e., directly on something.

[0074] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations rotated 90° or be in other orientations, and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery cell module, characterized in that, include: Multiple battery cells are stacked along a first direction, and each battery cell has two electrodes spaced apart on its electrode surface along a second direction, wherein the first direction and the second direction are perpendicular. An integrated busbar is provided with multiple electrode holes; the electrode surfaces of multiple battery cells are all connected to the integrated busbar; the positions of the electrode holes correspond one-to-one with the positions of the electrodes; Multiple busbars are provided, each busbar being located at the position of two adjacent electrode holes along the first direction; two protruding connecting portions are provided at intervals on the side of the busbar near the electrode; the protrusion height h of the protruding connecting portion and the depth H of the electrode hole are related in the following order: 0mm < h ≤ H; the two protruding connecting portions are respectively inserted into the two adjacent electrode holes along the first direction, so that the two protruding connecting portions are respectively connected to the two adjacent electrodes along the first direction.

2. The battery cell module according to claim 1, characterized in that, The two protruding connecting parts have the same shape and size, and the protrusion height h of the protruding connecting parts is equal to the depth H of the electrode hole.

3. The cell module according to claim 2, characterized in that, The range of the protrusion height h of the protrusion connection is: 0.2mm≤h≤0.8mm.

4. The cell module according to claim 3, characterized in that, The protrusion height h of the protruding connector is 0.5mm.

5. The battery cell module according to any one of claims 1-4, characterized in that, Both the protruding surface of the protruding connector and the end face of the electrode are flat, and the protruding surface is welded to the end face.

6. The battery cell module according to any one of claims 1-4, characterized in that, The busbar has a recessed portion on the side opposite to the protruding connection portion, so that the thickness is the same at all positions on the busbar.

7. The battery cell module according to any one of claims 1-4, characterized in that, The protruding connecting part is cylindrical in shape, and the protrusion direction is parallel to the axial direction of the cylinder; the electrode hole is a circular hole, and the size of the circular hole is adapted to that of the cylinder.

8. The battery cell module according to any one of claims 1-4, characterized in that, The busbar is a rectangular aluminum busbar, and the long side of the rectangular aluminum busbar is parallel to the first direction.

9. The cell module according to claim 8, characterized in that, The rectangular aluminum bar has a buffer structure between the two protruding connecting portions, so that the length of the rectangular aluminum bar along the first direction is adjustable.

10. The cell module according to claim 9, characterized in that, The buffer structure includes a resilient raised rib; the rectangular aluminum bar protrudes in a direction away from the electrode to form the raised rib, and the axial direction of the raised rib is parallel to the second direction.

11. A battery pack, characterized in that, The battery module and battery housing are as described in any one of claims 1-10, wherein the battery module is located inside the battery housing.

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