Battery cell module and battery pack

Abstract

The application relates to the technical field of energy storage, and provides a battery cell module and a battery pack. The battery cell module comprises a plurality of battery cells and a special-shaped bus assembly. The plurality of battery cells are arranged in at least two rows and an odd number of columns; two electrodes on each battery cell are arranged at intervals along the column arrangement direction; the plurality of battery cells in the odd number of columns comprise battery cells in a separate column and battery cells in the remaining columns; along the row arrangement direction, the battery cells in the separate column are located at the end of the battery cells in the remaining columns; among the battery cells in the remaining columns, two adjacent battery cells in each row are connected in parallel to form a battery cell group, so that each row comprises a plurality of battery cell groups arranged in layers; and the plurality of battery cell groups in each row are connected in series. At least two battery cells in the separate column are connected in parallel through the special-shaped bus assembly. In this way, the capacity of the battery cell module can be increased without changing the output voltage. When the number of battery cell columns of the battery cell module is odd, at least two battery cells in the separate column can also be connected in parallel, so that the arrangement of the battery cells in the battery cell module is not limited by the number of battery cell columns.

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. A battery cell module includes multiple stacked square battery cells and multiple ordinary busbars. The multiple ordinary busbars are used to connect the multiple battery cells to form the battery cell module.

[0003] To reduce the voltage of a battery module while maintaining its capacitance, existing technology connects the two positive terminals of two adjacent cells and the two negative terminals of two other adjacent cells to a common busbar, so that two adjacent cells are connected in parallel to form a cell group, and then different cell groups are connected in series.

[0004] However, when multiple cells are arranged in two rows and an odd number of columns, two cells at the same end of the two rows cannot be connected in parallel through a normal busbar to form a cell module. Utility Model Content

[0005] This application provides a battery cell module and a battery pack. The battery cell module includes multiple battery cells and a non-standard busbar assembly. When the battery cell module is installed in a battery pack, it can increase the battery pack's capacity while ensuring that the output voltage of the battery pack does not exceed the rated voltage of the electrical equipment, thus extending the power supply time of the battery pack. Furthermore, at least two cells located in a separate column can be connected in parallel, so the arrangement of the battery cells in the battery cell module is not limited by the number of cell columns, thereby facilitating the production of the battery cell module and improving its production efficiency.

[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 and a shaped busbar assembly. The plurality of battery cells are arranged in at least two rows and an odd number of columns; two electrodes on each battery cell are spaced apart along the column arrangement direction; the plurality of battery cells in the odd number of columns include battery cells in a single column and battery cells in the remaining columns; along the row arrangement direction, the battery cells in the single column are located at the ends of the battery cells in the remaining columns; in the battery cells of the remaining columns, two adjacent battery cells in each row are connected in parallel to form a battery cell group, so that each row includes a plurality of stacked battery cell groups; the plurality of battery cell groups in each row are connected in series sequentially. At least two battery cells located in a single column are connected in parallel via the shaped busbar assembly.

[0008] As an optional implementation, two adjacent cells in a separate column are respectively a first end cell and a second end cell; all cells except the first end cell and the second end cell are other cells; in each row of other cells, two adjacent other cells are connected in parallel to form a cell group;

[0009] Some of the irregularly shaped busbar components are first irregularly shaped busbar components, and the remaining irregularly shaped busbar components are second irregularly shaped busbar components; the first irregularly shaped busbar component includes a first connecting bar, a first bridging bar, and a first overlapping bar connected in sequence; the first connecting bar is connected to the positive terminal of the first end cell, and the first overlapping bar is connected to the positive terminal of the second end cell; the second irregularly shaped busbar component includes a second connecting bar, a second bridging bar, and a second overlapping bar connected in sequence; the second connecting bar is connected to the negative terminal of the second end cell, and the second overlapping bar is connected to the negative terminal of the first end cell.

[0010] As an optional implementation, the first end cell and the second end cell abut against each other along the column arrangement direction; of the two electrodes of the first end cell and the second end cell that are close to each other, one electrode is a positive electrode and the other electrode is a negative electrode;

[0011] The first connecting row, the first bridging row, and the first overlapping row are all strip plates. The long side of the first connecting row and the long side of the first overlapping row are parallel to the row arrangement direction, and the long side of the first bridging row is parallel to the column arrangement direction. The second connecting row, the second bridging row, and the second overlapping row are all strip plates. The long side of the second connecting row and the long side of the second overlapping row are parallel to the row arrangement direction, and the long side of the second bridging row is parallel to the column arrangement direction.

[0012] As an optional implementation, the first end of the first bridge bar is detachably connected to the side of the first connecting bar near the first end cell; the second end of the first bridge bar is detachably connected to the side of the first overlapping bar near the first end cell.

[0013] The first end of the second bridge bar is detachably connected to the side of the two connecting bars opposite to the second end cell; the second end of the second bridge bar is detachably connected to the side of the second overlapping bar opposite to the second end cell.

[0014] As an optional implementation, the first bridging row is recessed in a direction away from the first connecting row to form a first clearance groove; the first clearance groove is used to avoid the second overlapping row;

[0015] The second bridge row is recessed in a direction away from the second connecting row to form a second clearance groove; the second clearance groove is used to avoid the first overlapping row.

[0016] As an optional implementation, in each row of the cell group, the electrodes of the two other cells in each cell group are arranged in the same direction, and the electrodes of two adjacent cell groups are arranged in opposite directions.

[0017] The two negative terminals of the cell group adjacent to the first end cell are connected to the first connecting bar; the two positive terminals of the cell group adjacent to the second end cell are connected to the second connecting bar.

[0018] As an optional implementation, the battery cell module further includes a common bus; along the row arrangement direction, the two positive terminals of the battery cell group and the two negative terminals of the adjacent battery cell group are all connected to the same common bus, so that two other battery cells in the same battery cell group are connected in parallel and multiple battery cell groups in each row are connected in series sequentially.

[0019] As an optional implementation, all the battery cells are square cells of the same size; in the battery cell module, the size of the square cell along the column arrangement direction is larger than the size of the square cell along the row arrangement direction.

[0020] As an optional implementation, the plurality of battery cells are arranged in two rows and an odd number of columns; the battery cells in each row are aligned and connected along the row arrangement direction; and the battery cells in each column are aligned and connected along the column arrangement direction.

[0021] Secondly, this application provides a battery pack, the battery pack including the cell module described in any of the first aspects above.

[0022] Compared with the prior art, the beneficial effects of this application are at least as follows:

[0023] Because this cell module comprises multiple cells arranged in at least two rows and an odd number of columns; the two electrodes on each cell are spaced apart along the column arrangement direction; the multiple cells in the odd-numbered columns include cells in a single column and cells in the remaining columns; along the row arrangement direction, the cells in a single column are located at the ends of the cells in the remaining columns; in the cells of the remaining columns, two adjacent cells in each row are connected in parallel to form a cell group, so that each row includes multiple stacked cell groups; the multiple cell groups in each row are connected in series sequentially. Compared to a scheme where all cells in the cell module are connected in series sequentially, this increases the capacity of the cell module while maintaining the same output voltage. When this cell module is installed in a battery pack, it facilitates the battery pack in supplying power to devices with low rated voltage values. Specifically, it increases the capacity of the battery pack while ensuring that the output voltage of the battery pack does not exceed the rated voltage of the device, thus extending the power supply time of the battery pack.

[0024] Because the battery cell module includes a non-circular busbar assembly, at least two cells located in a separate column are connected in parallel through the non-circular busbar assembly. This allows at least two cells in a separate column to be connected in parallel even when the number of cell columns in the battery cell module is odd. Therefore, the arrangement of the cells in the battery cell module is not limited by the number of cell columns, thus facilitating the production of the battery cell module and improving its production efficiency. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the structure of a battery cell module provided in an embodiment of this application;

[0027] Figure 2 for Figure 1 Top view of the core module;

[0028] Figure 3 for Figure 1 Right view of the core module;

[0029] Figure 4 for Figure 1 A top view of multiple cells in a cell module.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100-Cell module, 110-Cell, 120-Irregular busbar assembly, 130-Cell group, 140-First end cell, 150-Second end cell, 160-Other cells, 170-First irregular busbar assembly, 171-First connecting bus, 172-First bridging bus, 1721-First clearance slot, 173-First overlapping bus, 180-Second irregular busbar assembly, 181-Second connecting bus, 182-Second bridging bus, 1821-Second clearance slot, 183-Second overlapping bus, 190-Ordinary busbar. Detailed Implementation

[0032] 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.

[0033] A battery cell module is a common energy storage unit. A battery cell module includes multiple stacked square battery cells and multiple ordinary busbars. The multiple ordinary busbars are used to connect the multiple square battery cells in series to form the battery cell module.

[0034] When this battery module is used to power certain electrical devices with low rated voltage, the number of battery cells connected in series within the module is relatively small in order to ensure that the total output voltage of the battery module does not exceed the rated voltage of the device. This results in a smaller amount of electricity stored in the battery module, and consequently, a shorter power supply time.

[0035] To address the issue of limited energy storage in battery modules under low output voltage conditions, a common approach is to connect the two positive terminals of two adjacent cells and the two negative terminals of two other adjacent cells in the same row of the module to a common busbar. This allows two adjacent cells to be connected in parallel to form a cell group, and then different cell groups are connected in series.

[0036] However, when multiple cells are arranged in two rows and an odd number of columns, two cells at the same end of the two rows cannot be connected in parallel through a normal busbar to form a cell module.

[0037] Based on the aforementioned technical problems, the battery cell module provided by this utility model solves these problems by setting up an irregularly shaped busbar assembly. Specifically, the battery cell module includes multiple battery cells. These multiple battery cells are arranged in at least two rows and an odd number of columns; the two electrodes on each battery cell are spaced apart along the column arrangement direction; the multiple battery cells in the odd number of columns include battery cells in a single column and battery cells in the remaining columns; along the row arrangement direction, the battery cells in the single column are located at the ends of the battery cells in the remaining columns; in the battery cells of the remaining columns, two adjacent battery cells in each row are connected in parallel to form a battery cell group, so that each row includes multiple stacked battery cell groups; the multiple battery cell groups in each row are connected in series sequentially. Compared to the solution of connecting all the battery cells in the battery cell module in series sequentially, this increases the capacity of the battery cell module while keeping the output voltage unchanged. When the battery cell module is installed in a battery pack, it facilitates the battery pack to supply power to electrical devices with low rated voltage values. Specifically, the battery pack's capacity can be increased while ensuring that its output voltage does not exceed the rated voltage of the electrical equipment, thus extending the battery pack's power supply time.

[0038] Because the battery cell module includes a non-circular busbar assembly, at least two cells located in a separate column are connected in parallel through the non-circular busbar assembly. This allows at least two cells in a separate column to be connected in parallel even when the number of cell columns in the battery cell module is odd. Therefore, the arrangement of the cells in the battery cell module is not limited by the number of cell columns, thus facilitating the production of the battery cell module and improving its production efficiency.

[0039] 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.

[0040] The following provides a detailed description of the specific structure of the aforementioned battery cell module and various possible implementation methods.

[0041] 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 A top view of the Zhongdian Cell Module 100. Figure 3 for Figure 1 Right view of the Zhongdian Cell Module 100 Figure 4 for Figure 1 A top view of multiple cells 110 in the cell module 100.

[0042] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The battery module 100 includes multiple battery cells 110 and an irregularly shaped busbar assembly 120. The multiple battery cells 110 are arranged in at least two rows and an odd number of columns; the two electrodes on each battery cell 110 are arranged along the column direction (…). Figure 2The cells 110 are spaced apart in the Y direction; the odd-numbered columns include cells 110 in a single column and cells 110 in the remaining columns; along the row arrangement direction, the cells 110 in the single column are located at the ends of the cells 110 in the remaining columns; in the remaining columns of cells 110, two adjacent cells 110 in each row are connected in parallel to form a cell group 130, so that each row includes multiple stacked cell groups 130; the multiple cell groups 130 in each row are connected in series. At least two cells 110 located in a single column are connected in parallel through a shaped bus assembly 120.

[0043] In this embodiment, the battery cell module 100 includes a plurality of battery cells 110. The plurality of battery cells 110 are arranged in at least two rows and an odd number of columns; the two electrodes on each battery cell 110 are spaced apart along the column arrangement direction; the plurality of battery cells 110 in the odd number of columns includes battery cells 110 in a single column and battery cells 110 in the remaining columns; along the row arrangement direction, the battery cells 110 in a single column are located at the ends of the battery cells 110 in the remaining columns; in the battery cells 110 in the remaining columns, two adjacent battery cells 110 in each row are connected in parallel to form a battery cell group 130, so that each row includes a plurality of stacked battery cell groups 130; the plurality of battery cell groups 130 in each row are connected in series sequentially. Compared with the scheme of connecting all the battery cells 110 in the battery cell module 100 in series sequentially, this increases the capacity of the battery cell module 100 without changing the output voltage of the battery cell module 100. When the battery cell module 100 is installed in a battery pack, it facilitates the battery pack in supplying power to electrical devices with low rated voltages. Specifically, it increases the battery pack's capacity while ensuring that the output voltage of the battery pack does not exceed the rated voltage of the electrical device, thus extending the battery pack's power supply time.

[0044] Since the battery module 100 includes a non-circular busbar assembly 120, at least two battery cells 110 located in a separate column are connected in parallel through the non-circular busbar assembly 120. In this way, even when the number of columns of battery cells 110 in the battery module 100 is odd, at least two battery cells 110 located in a separate column can still be connected in parallel. Therefore, the arrangement of battery cells 110 in the battery module 100 is not limited by the number of columns of battery cells 110, which facilitates the production of the battery module 100 and improves the production efficiency of the battery module 100.

[0045] It should be noted that the material of the above-mentioned irregularly shaped busbar component 120 can be copper or aluminum, or other types of conductive materials, and this application embodiment does not limit this.

[0046] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4Two adjacent cells 110 located in a separate column are respectively the first end cell 140 and the second end cell 150; among all the cells 110, except for the first end cell 140 and the second end cell 150, the remaining cells 110 are other cells 160; among the other cells 160 in each row, two adjacent other cells 160 are connected in parallel to form a cell group 130.

[0047] Part of the irregularly shaped busbar 120 is the first irregularly shaped busbar 170, and the remaining irregularly shaped busbar 120 is the second irregularly shaped busbar 180; the first irregularly shaped busbar 170 includes a first connecting bar 171, a first bridging bar 172, and a first overlapping bar 173 connected in sequence; the first connecting bar 171 is connected to the positive terminal of the first end cell 140, and the first overlapping bar 173 is connected to the positive terminal of the second end cell 150; the second irregularly shaped busbar 180 includes a second connecting bar 181, a second bridging bar 182, and a second overlapping bar 183 connected in sequence; the second connecting bar 181 is connected to the negative terminal of the second end cell 150, and the second overlapping bar 183 is connected to the negative terminal of the first end cell 140.

[0048] In this embodiment, two adjacent cells 110 located in a separate column are respectively the first end cell 140 and the second end cell 150; among all the cells 110, except for the first end cell 140 and the second end cell 150, the remaining cells 110 are all other cells 160; in each row of other cells 160, two adjacent other cells 160 are connected in parallel to form a cell group 130. Compared with the scheme of connecting all the cells 110 in the cell module 100 in series, this increases the capacity of the cell module 100 without changing the output voltage of the cell module 100.

[0049] The first irregularly shaped busbar assembly 170 includes a first connecting bar 171, a first bridging bar 172, and a first overlapping bar 173 connected in sequence; the first connecting bar 171 is connected to the positive terminal of the first end cell 140, and the first overlapping bar 173 is connected to the positive terminal of the second end cell 150. Thus, the positive terminals of the first end cell 140 and the second end cell 150 can be combined into a single positive terminal through the first irregularly shaped busbar assembly 170. Similarly, the second irregularly shaped busbar assembly 180 includes a second connecting bar 181, a second bridging bar 182, and a second overlapping bar 183 connected in sequence; the second connecting bar 181 is connected to the negative terminal of the second end cell 150, and the second overlapping bar 183 is connected to the negative terminal of the first end cell 140. Thus, the negative terminals of the first end cell 140 and the second end cell 150 can be combined into a single negative terminal through the second irregularly shaped busbar assembly 180. Therefore, the first end cell 140 and the second end cell 150 can be connected in parallel through a first irregularly shaped bus assembly 170 and a second irregularly shaped bus assembly 180.

[0050] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The first end cell 140 and the second end cell 150 abut against each other along the column arrangement direction; of the two electrodes of the first end cell 140 and the second end cell 150 that are close to each other, one electrode is the positive electrode and the other electrode is the negative electrode. The first connecting bar 171, the first bridging bar 172 and the first overlapping bar 173 are all strip plates, and the long side of the first connecting bar 171 and the long side of the first overlapping bar 173 are both perpendicular to the row arrangement direction ( Figure 2 The first bridge row 172 is parallel to the column arrangement direction (in the X direction). The second connecting row 181, the second bridge row 182 and the second overlapping row 183 are all strip plates. The long side of the second connecting row 181 and the long side of the second overlapping row 183 are parallel to the row arrangement direction, and the long side of the second bridge row 182 is parallel to the column arrangement direction.

[0051] In this embodiment, since the first connecting row 171, the first bridging row 172, and the first overlapping row 173 are all strip plates, the long side of the first connecting row 171 and the long side of the first overlapping row 173 are parallel to the row arrangement direction, and the long side of the first bridging row 172 is parallel to the column arrangement direction. Similarly, the second connecting row 181, the second bridging row 182, and the second overlapping row 183 are all strip plates, with the long side of the second connecting row 181 and the long side of the second overlapping row 183 parallel to the row arrangement direction, and the long side of the second bridging row 182 parallel to the column arrangement direction. This results in the overall shape of both the first irregularly shaped busbar assembly 170 and the second irregularly shaped busbar assembly 180 being U-shaped. Compared to a scheme where both the first irregularly shaped busbar 170 and the second irregularly shaped busbar 180 are set as straight lines, the U-shaped first irregularly shaped busbar 170 and the U-shaped second irregularly shaped busbar 180 can avoid each other when installed on the battery cell module 100, thus preventing a short circuit caused by direct connection between the positive and negative terminals.

[0052] Since the first end cell 140 and the second end cell 150 abut against each other along the column arrangement direction; among the two electrodes of the first end cell 140 and the second end cell 150 that are close to each other, one electrode is a positive electrode and the other electrode is a negative electrode. In this way, the electrode arrangement directions of the first end cell 140 and the second end cell 150 are opposite, and thus the distance between the two positive electrodes and the distance between the two negative electrodes in the first end cell 140 and the second end cell 150 are equal. Therefore, the shape and size of the first irregularly shaped bus assembly 170 and the second irregularly shaped bus assembly 180 can be the same, that is, the first irregularly shaped bus assembly 170 and the second irregularly shaped bus assembly 180 can be interchangeable, which facilitates the assembly of the cell module 100 and thus reduces the production cost of the cell module 100.

[0053] It should be noted that the first connecting row 171, the first bridging row 172, the first overlapping row 173, the second connecting row 181, the second bridging row 182 and the second overlapping row 183 mentioned above can all be rectangular plates or strip plates of other shapes. This application embodiment does not limit this.

[0054] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The first end of the first bridge bar 172 is detachably connected to the side of the first connecting bar 171 near the first end cell 140; the second end of the first bridge bar 172 is detachably connected to the side of the first overlapping bar 173 near the first end cell 140. The first end of the second bridge bar 182 is detachably connected to the side of the second connecting bar away from the second end cell 150; the second end of the second bridge bar 182 is detachably connected to the side of the second overlapping bar 183 away from the second end cell 150.

[0055] Because the first irregularly shaped busbar 170 has an irregular shape, it is manufactured separately as a first bridge bar 172, a first connecting bar 171, and a first overlapping bar 173, and then assembled. This facilitates the production of the first irregularly shaped busbar 170 and improves its production efficiency. Similarly, this also improves the production efficiency of the second irregularly shaped busbar 180. Furthermore, it allows the first irregularly shaped busbar 170 and the second irregularly shaped busbar 180 to be spatially staggered, thus facilitating the spatial arrangement of the battery cell module 100.

[0056] It should be noted that the above-mentioned detachable connection method can be bolt connection, snap-fit ​​connection, or other connection methods, and this application embodiment does not limit this.

[0057] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The first bridging row 172 is recessed in a direction away from the first connecting row 171 to form a first clearance groove 1721; the first clearance groove 1721 is used to avoid the second overlapping row 183. The second bridging row 182 is recessed in a direction away from the second connecting row 181 to form a second clearance groove 1821; the second clearance groove 1821 is used to avoid the first overlapping row 173.

[0058] In this embodiment, the positive terminals of the first end cell 140 and the second end cell 150 are combined into one positive terminal through the first irregularly shaped busbar assembly 170, and the negative terminals of the first end cell 140 and the second end cell 150 are combined into one negative terminal through the second irregularly shaped busbar assembly 180. Since the first clearance slot 1721 of the first bridge busbar 172 can avoid the second overlap busbar 183, and the second clearance slot 1821 of the second bridge busbar 182 can avoid the first overlap busbar 173, contact between the first irregularly shaped busbar assembly 170 and the second irregularly shaped busbar assembly 180 can be avoided, thus preventing short circuits between the positive and negative terminals and enabling the cell module 100 to operate more stably.

[0059] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 In each row of cell groups 130, the electrodes of the two other cells 160 in each cell group 130 are arranged in the same direction, and the electrodes of two adjacent cell groups 130 are arranged in opposite directions. The two negative terminals of the cell group 130 adjacent to the first end cell 140 are connected to the first connection bar 171; the two positive terminals of the cell group 130 adjacent to the second end cell 150 are connected to the second connection bar 181.

[0060] In this embodiment, since the electrodes of the two other cells 160 in each cell group 130 are arranged in the same direction, and the electrodes of two adjacent cell groups 130 are arranged in opposite directions, it is convenient to connect the same-name electrodes of the two other cells 160 in each cell group 130 through a common bus 190 to realize the parallel connection of the two other cells 160; it is also convenient to connect the opposite-name electrodes of two adjacent cell groups 130 to realize the series connection of the two adjacent cell groups 130.

[0061] The two negative terminals of the cell group 130 adjacent to the first end cell 140 are connected to the first connecting bus 171; the two positive terminals of the cell group 130 adjacent to the second end cell 150 are connected to the second connecting bus 181. Thus, the first connecting bus 171 can connect the two negative terminals of the cell group 130 adjacent to the first end cell 140 in parallel, and the second connecting bus 181 can connect the two positive terminals of the cell group 130 adjacent to the second end cell 150 in parallel. Simultaneously, the parallel-connected first end cell 140 and second end cell 150 can be connected to other cell groups 130.

[0062] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4The battery cell module 100 also includes a common bus 190. Along the row arrangement direction, the two positive terminals of the battery cell group 130 and the two negative terminals of the adjacent battery cell group 130 are all connected to the same common bus 190, so that two other battery cells 160 in the same battery cell group 130 are connected in parallel and multiple battery cell groups 130 in each row are connected in series.

[0063] In each row of cell groups 130, the electrodes of the two other cells 160 in each cell group 130 are arranged in the same direction, while the electrodes of adjacent cell groups 130 are arranged in opposite directions. Based on this arrangement, along the row layout direction, a common bus 190 can connect the two positive terminals of a cell group 130 to the two negative terminals of an adjacent cell group 130. This allows two other cells 160 in the same cell group 130 to be connected in parallel, and multiple cell groups 130 in each row to be connected in series. Furthermore, since the common bus 190 has a low cost, the production cost of the cell module 100 can be reduced while ensuring the normal connection of the other cells 160.

[0064] It should be noted that the aforementioned ordinary bus 190 can be a rectangular bus or a strip bus of other shapes, and this application embodiment does not limit this.

[0065] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 All battery cells 110 are square cells of the same size; in the battery cell module 100, the size of the square cells along the column arrangement direction is larger than the size of the square cells along the row arrangement direction.

[0066] Since all the cells 110 are square cells of the same size, the cell module 100 formed by arranging multiple cells 110 in at least two rows and an odd number of columns is rectangular in shape. When the cell module 100 is installed in the battery pack, it is beneficial for the layout of the internal space of the battery pack.

[0067] Since the two electrodes on each cell 110 are spaced apart along the column arrangement direction, when the size of the square cell along the column arrangement direction is larger, the distance between the two electrodes on each cell 110 can be larger, which can further avoid the phenomenon of short circuit between the positive and negative terminals, thus enabling the cell module 100 to operate more stably.

[0068] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4Multiple battery cells 110 are arranged in two rows and an odd number of columns; the battery cells 110 in each row are aligned and connected along the row arrangement direction; the battery cells 110 in each column are aligned and connected along the column arrangement direction.

[0069] In this embodiment, since the multiple battery cells 110 are arranged in two rows, the structure of the battery cell module 100 is simpler than that of a scheme where the multiple battery cells 110 are arranged in more than two rows, thus improving the stability of the battery cell module 100.

[0070] Since each row of cells 110 is aligned and connected along the row arrangement direction, and each column of cells 110 is aligned and connected along the column arrangement direction, the cell module 100 formed by arranging multiple cells 110 in this way has a cuboid shape. When this cell module 100 is installed in a battery pack, it is beneficial for the layout of the internal space of the battery pack.

[0071] It should be noted that, Figure 4 The "+" in the diagram represents the positive terminal of cell 110, and the "-" represents the negative terminal of cell 110.

[0072] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This application embodiment also provides a battery pack, which includes any of the above-described cell modules 100.

[0073] In this embodiment, the battery module 100 includes multiple battery cells 110. The multiple battery cells 110 are arranged in at least two rows and an odd number of columns; the two electrodes on each battery cell 110 are spaced apart along the column arrangement direction; the multiple battery cells 110 in the odd number of columns include battery cells 110 in a single column and battery cells 110 in the remaining columns; along the row arrangement direction, the battery cells 110 in a single column are located at the ends of the battery cells 110 in the remaining columns; in the remaining columns of battery cells 110, two adjacent battery cells 110 in each row are connected in parallel to form a battery cell group 130, so that each row includes multiple stacked battery cell groups 130; the multiple battery cell groups 130 in each row are connected in series sequentially. Compared to the scheme of connecting all battery cells 110 in the battery module 100 in series sequentially, this increases the capacity of the battery module 100 without changing the output voltage of the battery module 100. When the battery cell module 100 is installed in a battery pack, it facilitates the battery pack in supplying power to electrical devices with low rated voltages. Specifically, it increases the battery pack's capacity while ensuring that the output voltage of the battery pack does not exceed the rated voltage of the electrical device, thus extending the battery pack's power supply time.

[0074] Because the cell module 100 includes a shaped busbar assembly 120, at least two cells 110 located in a separate column are connected in parallel through the shaped busbar assembly 120. Thus, even when the number of columns of cells 110 in the cell module 100 is odd, at least two cells 110 located in a separate column can still be connected in parallel. Therefore, the arrangement of the cells 110 in the cell module 100 is not limited by the number of columns, thereby facilitating the production of the cell module 100 and improving its production efficiency. This, in turn, improves the production efficiency of the battery pack.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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. An electric cell module, characterized by comprising: include: A plurality of battery cells are arranged in at least two rows and an odd number of columns; two electrodes on each battery cell are spaced apart along the column arrangement direction; the plurality of battery cells in the odd number of columns include battery cells in a single column and battery cells in the remaining columns; along the row arrangement direction, the battery cells in the single column are located at the ends of the battery cells in the remaining columns; in the battery cells in the remaining columns, two adjacent battery cells in each row are connected in parallel to form a battery cell group, so that each row includes a plurality of battery cell groups arranged in a stacked manner; the plurality of battery cell groups in each row are connected in series sequentially; A shaped busbar assembly, wherein at least two of the cells located in a separate column are connected in parallel via the shaped busbar assembly.

2. The battery cell module of claim 1, wherein, Two adjacent cells in a single column are respectively a first end cell and a second end cell; all cells except the first end cell and the second end cell are other cells; in each row of other cells, two adjacent other cells are connected in parallel to form a cell group; Some of the irregularly shaped busbar components are first irregularly shaped busbar components, and the remaining irregularly shaped busbar components are second irregularly shaped busbar components; the first irregularly shaped busbar component includes a first connecting bar, a first bridging bar, and a first overlapping bar connected in sequence; the first connecting bar is connected to the positive terminal of the first end cell, and the first overlapping bar is connected to the positive terminal of the second end cell; the second irregularly shaped busbar component includes a second connecting bar, a second bridging bar, and a second overlapping bar connected in sequence; the second connecting bar is connected to the negative terminal of the second end cell, and the second overlapping bar is connected to the negative terminal of the first end cell.

3. The battery cell module of claim 2, wherein, The first end cell and the second end cell abut against each other along the column arrangement direction; of the two electrodes of the first end cell and the second end cell that are close to each other, one electrode is a positive electrode and the other electrode is a negative electrode; The first connecting row, the first bridging row, and the first overlapping row are all strip plates. The long side of the first connecting row and the long side of the first overlapping row are parallel to the row arrangement direction, and the long side of the first bridging row is parallel to the column arrangement direction. The second connecting row, the second bridging row, and the second overlapping row are all strip plates. The long side of the second connecting row and the long side of the second overlapping row are parallel to the row arrangement direction, and the long side of the second bridging row is parallel to the column arrangement direction.

4. The battery cell module of claim 3, wherein, The first end of the first bridge bar is detachably connected to the side of the first connecting bar near the first end cell; the second end of the first bridge bar is detachably connected to the side of the first overlapping bar near the first end cell. The first end of the second bridge bar is detachably connected to the side of the two connecting bars opposite to the second end cell; the second end of the second bridge bar is detachably connected to the side of the second overlapping bar opposite to the second end cell.

5. The battery cell module of claim 4, wherein, The first bridge row is recessed in a direction away from the first connecting row to form a first clearance groove; the first clearance groove is used to avoid the second overlapping row. The second bridge row is recessed in a direction away from the second connection row to form a second avoiding groove; the second avoiding groove is used for avoiding the first overlap row.

6. The module of any one of claims 2-5, wherein, In each row of the battery cell groups, the electrodes of the two other battery cells in each of the battery cell groups are arranged in the same direction, and the electrodes of adjacent two battery cell groups are arranged in opposite directions. The two negative electrodes of the battery cell group adjacent to the first end battery cell are connected with the first connection row; the two positive electrodes of the battery cell group adjacent to the second end battery cell are connected with the second connection row.

7. The battery cell module of claim 6, wherein, The battery cell module further comprises a common bus bar. Along the row arrangement direction, the two positive electrodes of the battery cell group and the two negative electrodes of the adjacent battery cell group are connected with the same common bus bar, so that the two other battery cells in the same battery cell group are connected in parallel, and the multiple battery cell groups in each row are connected in series.

8. The battery cell module of claim 6, wherein, The battery cells are all square battery cells with the same size; in the battery cell module, the size of the square battery cell along the column arrangement direction is greater than the size of the square battery cell along the row arrangement direction.

9. The battery cell module of claim 8, wherein, The multiple battery cells are arranged in two rows and an odd number of columns; each row of the battery cells is connected in alignment along the row arrangement direction; and each column of the battery cells is connected in alignment along the column arrangement direction.

10. A battery pack, characterized by, The battery cell module comprises the battery cell module according to any one of claims 1-9.

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