Battery assembly

Abstract

The utility model discloses a battery assembly, and relates to the technical field of battery design. The battery assembly comprises a protection plate, at least one adapter plate, at least one first battery cell and at least one second battery cell, the first battery cell and the second battery cell are arranged at an interval, and a tab of the first battery cell is electrically connected with a first connection area of the protection plate. The adapter plate is provided with a first plug-in terminal and a second plug-in terminal which are arranged at an interval, a tab of the second battery cell is matched with the first plug-in terminal in a plug-in manner and is electrically connected with the first plug-in terminal, a third plug-in terminal is arranged in the second connecting area of the protection plate, and the third plug-in terminal is matched with the second plug-in terminal in a plug-in manner and is electrically connected with the second plug-in terminal. And the tab of the second battery cell is electrically connected with the protection plate through the adapter plate. According to the scheme, the problem that the through-current capability of the adapter plate of the current battery assembly is relatively weak can be solved.

Description

Technical Field

[0001] This application belongs to the field of battery design technology, and specifically relates to a battery module. Background Technology

[0002] Using rechargeable batteries is one of the advantages of laptops over desktop computers, greatly facilitating user operation in various environments. Due to their portability, laptops can operate solely on batteries, leading to increasing market demand. However, as laptops strive for lighter designs, battery sizes are shrinking, making it impossible for some battery cells to be directly connected to the protection board, requiring the use of adapters.

[0003] Currently, as the energy density of battery cells increases, battery capacity also increases. To improve charging efficiency, the adapter plate needs to have strong current-carrying capacity, which is usually achieved by increasing the width of the adapter plate. However, due to the size limitations of the battery, there is no longer enough space to increase the width of the adapter plate. Therefore, increasing the thickness of the adapter plate needs to be considered. However, increasing the thickness of the adapter plate can lead to poor welding between the adapter plate and the cell tabs and protection board, thereby reducing the safety and reliability of the battery. Utility Model Content

[0004] The purpose of this application is to provide a battery assembly that can solve the problem of weak current carrying capacity of the adapter plate in current battery assemblies.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] This application provides a battery assembly including a protection board, at least one adapter board, at least one first battery cell, and at least one second battery cell. The first battery cell and the second battery cell are spaced apart. The tab of the first battery cell is electrically connected to a first connection area of ​​the protection board. The adapter board has a first plug-in terminal and a second plug-in terminal spaced apart. The tab of the second battery cell is plugged into and electrically connected to the first plug-in terminal. The second connection area of ​​the protection board has a third plug-in terminal, which is plugged into and electrically connected to the second plug-in terminal, so that the tab of the second battery cell is electrically connected to the protection board through the adapter board.

[0007] In this embodiment, the tab of the first battery cell is electrically connected to the first connection area of ​​the protection board. The adapter board has a first and a second plug-in terminal spaced apart. The tab of the second battery cell is plugged into and electrically connected to the first plug-in terminal. The second connection area of ​​the protection board has a third plug-in terminal, which is plugged into and electrically connected to the second plug-in terminal, so that the tab of the second battery cell is electrically connected to the second end of the protection board through the adapter board. This solution changes the electrical connection method between the adapter board and the tab and the protection board from welding to plugging. Therefore, it is not necessary to consider the impact of the thickness of the adapter board on the welding yield. At this time, the thickness of the adapter board can be increased according to actual needs, thereby improving the current carrying capacity of the adapter board to meet the fast charging requirements of high-capacity battery packs. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the battery assembly structure disclosed in the embodiments of this application;

[0009] Figure 2 for Figure 1 A magnified view of a portion of the structure shown.

[0010] Figure 3 This is a schematic diagram of the battery assembly disclosed in an embodiment of this application from another perspective;

[0011] Figure 4 for Figure 3 A magnified view of a portion of the structure shown.

[0012] Figure 5 This is a schematic diagram of the structure of the protection board and adapter board disclosed in the embodiments of this application;

[0013] Figures 6 to 7 These are schematic diagrams of the adapter board disclosed in the embodiments of this application from different perspectives.

[0014] Figure 8 This is a schematic diagram of the structure of the protection plate disclosed in the embodiments of this application;

[0015] Figures 9 to 11 These are schematic diagrams of the third plug-in terminal disclosed in the embodiments of this application from different perspectives.

[0016] Explanation of reference numerals in the attached figures:

[0017] 100-Adapter plate, 110-First plug-in terminal, 111-Base, 111a-Plug-in slot, 111b-Positioning protrusion, 111c-Limiting protrusion, 111d-Allowing opening, 111e-First protrusion, 111e1-First side plate, 111e2-Top plate, 111e3-Second side plate, 111f-Bottom plate, 111g-Second protrusion, 120-Second plug-in terminal, 121-Second positioning hole, 130-Board body, 131-First strip, 132-Second strip;

[0018] 200-Protection plate, 210-Third adapter terminal, 211-Positioning component, 211a-Allowing notch, 211b-Operating part, 220-First connecting strip, 230-Second connecting strip, 240-First connecting area, 250-Second connecting area;

[0019] 310 - First battery cell, 311 - Tab of the first battery cell, 320 - Second battery cell, 321 - Tab of the second battery cell, 321a - First positioning hole. Detailed Implementation

[0020] 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, not all, of the embodiments of this application. 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.

[0021] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0022] The battery assembly provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0023] like Figures 1 to 11As shown, this application embodiment provides a battery assembly, which includes a protection plate 200, at least one adapter plate 100, at least one first battery cell 310 and at least one second battery cell 320. Optionally, the adapter plate 100 can be a copper structure, which has good conductivity. Of course, it can also be made of other types of metals. This application embodiment does not make specific limitations on this.

[0024] The first battery cell 310 and the second battery cell 320 are spaced apart. The tab 311 of the first battery cell 310 is electrically connected to the first connection area 240 of the protection board 200. The adapter plate 100 has a first plug-in terminal 110 and a second plug-in terminal 120 spaced apart. The tab 321 of the second battery cell 320 is plugged into and electrically connected to the first plug-in terminal 110. The second connection area 250 of the protection board 200 is provided with a third plug-in terminal 210, which is plugged into and electrically connected to the second plug-in terminal 120, so that the tab 311 of the second battery cell 320 is electrically connected to the second end of the protection board 200 through the adapter plate 100. Optionally, when there are at least two second battery cells 320, the adapter plate 100 is arranged in a one-to-one correspondence with the second battery cells 320.

[0025] In this embodiment, by changing the electrical connection between the adapter plate 100 and the tabs 311 of the first battery cell 310 and the protection board 200 from welding to a plug-in connection, the impact of the thickness of the adapter plate 100 on the welding yield is eliminated. The thickness of the adapter plate 100 can be increased as needed to improve its current-carrying capacity, thus meeting the fast-charging requirements of high-capacity battery modules. Therefore, this embodiment solves the problem of the weak current-carrying capacity of the adapter plate 100 in current battery modules.

[0026] In addition, in the above embodiments, when the thickness of the adapter plate 100 is increased, its internal impedance is reduced, which can greatly reduce the heat generation of the adapter plate 100; and, compared with the welding method, the plug-in method has higher assembly efficiency, and can avoid problems such as porosity, hot cracks, spatter, and weld misalignment during the welding process, thereby improving the safety and reliability of the battery assembly.

[0027] Optionally, at least one of the tabs 311 of the first battery cell 310 and the second battery cell 320 in the above embodiments may be made of aluminum or copper. This application does not impose specific limitations on this.

[0028] In one optional embodiment, both the first plug-in terminal 110 and the third plug-in terminal 210 include a base 111. The base 111 is provided with a plug-in groove 111a. The tab 321 of the second battery cell 320 is plugged into and electrically connected to the plug-in groove 111a of the first plug-in terminal 110. The second plug-in terminal 120 is plugged into and electrically connected to the plug-in groove 111a of the third plug-in terminal 210. Optionally, the plugging directions of the tab 321 of the second battery cell 320 and the second plug-in terminal 120 can both be parallel to the thickness direction of the second battery cell 320. Alternatively, in other optional embodiments, at least one of the tab 321 of the second battery cell 320 and the second plug-in terminal 120 is plugged into... The connection direction is perpendicular to the thickness direction of the second cell 320, that is, the tabs 321 and the second plug-in terminal 120 of the second cell 320 are both plugged in the horizontal plane. When the tabs 321 of the second cell 320 are plugged into the plug slot 111a of the first plug-in terminal 110, this can increase the contact area between the tabs 321 of the second cell 320 and the first plug-in terminal 110, thereby improving the plugging stability between the two. Similarly, when the second plug-in terminal 120 is plugged into the plug slot 111a of the third plug-in terminal 210, this can increase the contact area between the second plug-in terminal 120 and the third plug-in terminal 210, thereby improving the plugging stability between the two.

[0029] In another optional embodiment, the insertion groove 111a of the first insertion terminal 110 is provided with a positioning protrusion 111b, and the tab 321 of the second battery cell 320 is provided with a first positioning hole 321a. The tab 321 of the second battery cell 320 is sleeved on the positioning protrusion 111b of the first insertion terminal 110 through the first positioning hole 321a, so that the tab 321 of the second battery cell 320 is positioned and engaged with the base 111 of the first insertion terminal 110, thereby improving the insertion stability between the tab 321 of the second battery cell 320 and the first insertion terminal 110, so as to ensure stable current transmission. Of course, the insertion groove 111a of the first insertion terminal 110 may not be provided with a positioning protrusion 111b. In this case, the tab 321 of the second battery cell 320 and the base 111 of the first insertion terminal 110 can be positioned by friction.

[0030] In another optional embodiment, the insertion groove 111a of the third insertion terminal 210 is provided with a positioning protrusion 111b, and the second insertion terminal 120 is provided with a second positioning hole 121. Optionally, the second insertion terminal 120 can be a metal sheet, which facilitates the opening of the second positioning hole 121. The second insertion terminal 120 is sleeved on the positioning protrusion 111b of the third insertion terminal 210 through the second positioning hole 121, so that the second insertion terminal 120 and the base 111 of the third insertion terminal 210 are positioned and engaged, thereby improving the insertion stability between the second insertion terminal 120 and the third insertion terminal 210, so as to ensure stable current transmission. Of course, the insertion groove 111a of the third insertion terminal 210 may not be provided with a positioning protrusion 111b. In this case, the second insertion terminal 120 and the base 111 of the third insertion terminal 210 can be positioned by friction.

[0031] In another optional embodiment, the base 111 is provided with a clearance opening 111d communicating with the insertion slot 111a. The clearance opening 111d penetrates the side of the base 111 away from the plate body 130 of the adapter plate 100. The third insertion terminal 210 also includes a positioning member 211. At least a portion of the positioning member 211 is disposed in the clearance opening 111d. The positioning member 211 is rotatably connected to the base 111 so that the positioning member 211 presses against the second insertion terminal 120. Specifically, before inserting the second plug-in terminal 120, the positioning member 211 is driven to rotate, thereby increasing the gap between the positioning member 211 and the base plate 111f of the plug-in groove 111a. Then, the second plug-in terminal 120 is inserted into the plug-in groove 111a of the third plug-in terminal 210. Next, the positioning member 211 is driven to rotate in the opposite direction, pressing it against the second plug-in terminal 120, thus improving the insertion stability between the second plug-in terminal 120 and the third plug-in terminal 210. Optionally, the connection between the positioning member 211 and the base 111 can be an elastic structure. When the second plug-in terminal 120 is inserted into the plug-in groove 111a of the third plug-in terminal 210, the positioning member 211 can be released directly, and it rotates in the opposite direction through its own deformation, thereby saving driving force.

[0032] Optionally, the rotation center axis of the positioning member 211 is located at one end of the base 111 away from the slot of the insertion groove 111a. This can prevent the end of the positioning member 211 connected to the base 111 from interfering with the side wall of the insertion groove 111a, thereby facilitating the setting of the positioning member 211.

[0033] In a further optional embodiment, the insertion slot 111a is provided with a positioning protrusion 111b for positioning and engaging with the second insertion terminal 120. The positioning member 211 is provided with a clearance notch 211a, which is opposite to the positioning protrusion 111b. This allows for easy inspection of whether the positioning protrusions 111b of the second insertion terminal 120 and the third insertion terminal 210 are precisely engaged. Optionally, the positioning member 211 is also provided with an operating part 211b, located at the clearance notch 211a. The operating part 211b can drive the positioning member 211 to rotate relative to the base 111. When the positioning member 211 needs to rotate, the operating part 211b can be manually driven to rotate the positioning member 211 relative to the base 111. That is, the operation part 211b is provided to facilitate the operator to drive the positioning member 211 to rotate. Of course, the operating part 211b may not be provided, and the positioning member 211 may be driven to rotate by manually operating one end of the positioning member 211 away from its rotation center axis.

[0034] In a further optional embodiment, at least one of the opposite side walls of the insertion slot 111a is provided with a limiting protrusion 111c. In the thickness direction of the second cell 320, the limiting protrusion 111c is located above the positioning member 211, and the positioning member 211 can be engaged with the limiting protrusion 111c for limiting engagement. During the rotation of the positioning member 211 relative to the base 111, when the positioning member 211 is engaged with the limiting protrusion 111c, the limiting protrusion 111c will prevent the positioning member 211 from continuing to rotate, thereby preventing the excessive rotation angle of the positioning member 211 from damaging the connection between the positioning member 211 and the base 111. Of course, the limiting protrusion 111c may not be provided.

[0035] In an optional embodiment, the base 111 includes a first protrusion 111e, a bottom plate 111f, and a second protrusion 111g connected in sequence. Optionally, both the first protrusion 111e and the second protrusion 111g can be block structures; or, both the first protrusion 111e and the second protrusion 111g include a first side plate 111e1, a top plate 111e2, and a second side plate 111e3 connected in sequence. The first side plate 111e1 is connected to the bottom plate 111f, and the second side plate 111e3 is opposite to the first side plate 111e1. The second side plate 111e3 of the first protrusion 111e is connected to the second protrusion 111g. The second side plates 111e3 are opposite each other to form a clearance opening 111d. That is, the two side walls opposite to the clearance opening 111d are respectively formed by the second side plates 111e3 of the first protrusion 111e and the second side plates 111e3 of the second protrusion 111g. The height of the second side plate 111e3 is less than the height of the first side plate 111e1. That is, there is a gap between the first side plate 111e1 of the first protrusion 111e and the first side plate 111e1 of the second protrusion 111g and the bottom plate 111f, so that an insertion groove 111a is formed between the first protrusion 111e and the second protrusion 111g and the bottom plate 111f. The first protrusion 111e and the second protrusion 111g in this solution adopt the above structure, which can reduce the amount of material used in manufacturing the first protrusion 111e and the second protrusion 111g, so that the battery assembly meets the requirements of lightweighting; and, it can reduce the contact area between the tab 311 or the second plug-in terminal 120 and the base 111, thereby reducing friction and avoiding wear, so as to protect the tab 311 and the second plug-in terminal 120.

[0036] Optionally, in the above embodiments, at least one of the two side walls opposite to the insertion slot 111a is provided with a limiting protrusion 111c. In the thickness direction of the second cell 320, the limiting protrusion 111c is located above the positioning member 211. The limiting protrusion 111c can be connected to the second side plate 111e3 and is flush with the top plate 111e2; or, the limiting protrusion 111c is directly connected to the top plate 111e2 and the two are flush. The second side plate 111e3 is provided with a clearance area for avoiding the limiting protrusion 111c. The positioning member 211 can be limited and cooperated with the limiting protrusion 111c.

[0037] Optionally, the base 111 described above can be an integral structure, which has better structural continuity and is easier to install.

[0038] Optionally, in the thickness direction of the base plate 111f, the tab 321 of the second cell 320 can be limited and engaged with the second side plate 111e3 of the first plug-in terminal 110, and the second plug-in terminal 120 can be limited and engaged with the second side plate 111e3 of the third plug-in terminal 210. This can improve the plugging stability of the tab 321 of the second cell 320 and the first plug-in terminal 110, as well as the plugging stability of the second plug-in terminal 120 and the third plug-in terminal 210.

[0039] In one optional embodiment, at least one first cell 310 includes first sub-cells and second sub-cells arranged at intervals, and the protection plate 200 includes a first strip plate 220 and a second strip plate 230 connected together. Optionally, the first strip plate 220 is bent relative to the second strip plate 230, that is, the protection plate 200 has an L-shaped structure. The first strip plate 220 is disposed between the first sub-cell and the second sub-cell, and a first connection area 240 is disposed on the first strip plate 220. The tabs 311 of the first sub-cell and the second sub-cell are both electrically connected to the first connection area 240 on the first strip plate 220, and the two are staggered along the length direction of the first strip plate 220. The second strip plate 230 and the first cell 310 are arranged side by side along the extension direction of the first strip plate 220, and a portion of the second strip plate 230 extends to a position close to the second cell 320. A second connection area 250 is disposed on the second strip plate 230. The protection board 200 in this scheme adopts the above structure. The first sub-cell and the second sub-cell share the same second strip plate 230, which can improve the structural utilization of the second strip plate 230 and increase the energy storage capacity of the battery module.

[0040] Optionally, the number of second strip plates 230 can be at least two. In this case, the length of the first strip plate 220 can be extended, and each second strip plate 230 is arranged at intervals along the length direction of the first strip plate 220. At least one first cell 310 also includes a third sub-cell and a fourth sub-cell arranged at intervals. Each second strip plate 230 connects two sub-cells, thereby further increasing the energy storage capacity of the battery assembly.

[0041] In one optional embodiment, the number of the first plug-in terminal 110, the second plug-in terminal 120, and the third plug-in terminal 210 are all at least two. Each of the at least two first plug-in terminals 110, 120, and 210 includes a positive terminal and a negative terminal arranged at intervals. Correspondingly, the number of tabs 321 of the second battery cell 320 is also at least two, including positive and negative tabs arranged at intervals. Specifically, the positive tab of the second battery cell 320 is plugged into and electrically connected to the negative terminal of the first plug-in terminal 110. The negative terminal of the second cell 320 is plugged into and electrically connected to the positive terminal of the first plug-in terminal 110. The positive terminal of the second plug-in terminal 120 is plugged into and connected to the negative terminal of the third plug-in terminal 210. The negative terminal of the second plug-in terminal 120 is plugged into and connected to the positive terminal of the third plug-in terminal 210. The negative terminal of the first plug-in terminal 110 is electrically connected to the positive terminal of the second plug-in terminal 120 through a first wire, and the positive terminal of the first plug-in terminal 110 is electrically connected to the negative terminal of the second plug-in terminal 120 through a second wire.

[0042] Optionally, the adapter board 100 includes a board body 130, a first plug-in terminal 110, and a second plug-in terminal 120. The board body 130 includes a first strip portion 131 and a second strip portion 132 connected together. The extension direction of the first strip portion 131 is perpendicular to the extension direction of the second strip portion 132. The first plug-in terminal 110 is disposed in the first strip portion 131. The first strip portion 131 is located between the first battery cell 310 and the second battery cell 320. The second plug-in terminal 120 is disposed in the second strip portion 132. Optionally, the board body 130 can be an L-shaped structure; or, the board body 130 can be a T-shaped structure. The positive and negative terminals of the second plug-in terminal 120 are located on opposite sides of the first strip portion 131, which facilitates the arrangement of wires inside the board body 130.

[0043] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A battery assembly, characterized in that, The device includes a protection board (200), at least one adapter board (100), at least one first battery cell (310), and at least one second battery cell (320). The first battery cell (310) and the second battery cell (320) are spaced apart. The tab (311) of the first battery cell (310) is electrically connected to the first connection area (240) of the protection board (200). The adapter board (100) has a first plug-in terminal (110) and a second plug-in terminal (120) spaced apart. The tab (321) of the second cell (320) is plugged into and electrically connected to the first plug-in terminal (110). The second connection area (250) of the protection plate (200) is provided with a third plug-in terminal (210). The third plug-in terminal (210) is plugged into and electrically connected to the second plug-in terminal (120), so that the tab (321) of the second cell (320) is electrically connected to the protection plate (200) through the adapter plate (100).

2. The battery assembly according to claim 1, characterized in that, Both the first plug-in terminal (110) and the third plug-in terminal (210) include a base (111), the base (111) is provided with a plug-in groove (111a), the tab (321) of the second cell (320) is plugged into the plug-in groove (111a) of the first plug-in terminal (110) and the two are electrically connected, the second plug-in terminal (120) is plugged into the plug-in groove (111a) of the third plug-in terminal (210) and the two are electrically connected, and the plugging direction of at least one of the tab (321) of the second cell (320) and the second plug-in terminal (120) is perpendicular to the thickness direction of the second cell (320).

3. The battery assembly according to claim 2, characterized in that, The first plug-in terminal (110) has a positioning protrusion (111b) in the plug-in groove (111a), and the second battery cell (320) has a first positioning hole (321a) on its tab (321). The second battery cell (320) is sleeved on the positioning protrusion (111b) of the first plug-in terminal (110) through the first positioning hole (321a) so that the second battery cell (320) is positioned and engaged with the base (111) of the first plug-in terminal (110).

4. The battery assembly according to claim 2, characterized in that, The third plug-in terminal (210) has a positioning protrusion (111b) in the plug groove (111a), and the second plug-in terminal (120) has a second positioning hole (121). The second plug-in terminal (120) is sleeved on the positioning protrusion (111b) of the third plug-in terminal (210) through the second positioning hole (121) so that the second plug-in terminal (120) and the base (111) of the third plug-in terminal (210) are positioned and engaged.

5. The battery assembly according to claim 2, characterized in that, The base (111) is provided with a clearance opening (111d) communicating with the insertion slot (111a). The clearance opening (111d) penetrates the side of the base (111) away from the main body of the adapter plate (100). The third insertion terminal (210) also includes a positioning member (211). At least a portion of the positioning member (211) is disposed in the clearance opening (111d). The positioning member (211) is rotatably connected to the base (111) so that the positioning member (211) presses on the second insertion terminal (120). The rotation center axis of the positioning member (211) is located at one end of the base (111) away from the slot of the insertion slot (111a).

6. The battery assembly according to claim 5, characterized in that, The insertion slot (111a) is provided with a positioning protrusion (111b) for positioning and engaging with the second insertion terminal (120), and the positioning member (211) is provided with a clearance notch (211a), which is opposite to the positioning protrusion (111b). The positioning member (211) is also provided with an operating part (211b), which is located at the clearance notch (211a) and can drive the positioning member (211) to rotate relative to the base (111).

7. The battery assembly according to claim 5, characterized in that, At least one of the two side walls opposite to the clearance opening (111d) is provided with a limiting protrusion (111c). In the thickness direction of the second cell (320), the limiting protrusion (111c) is located above the positioning member (211), and the positioning member (211) can be limited and cooperated with the limiting protrusion (111c).

8. The battery assembly according to claim 5, characterized in that, The base (111) includes a first protrusion (111e), a bottom plate (111f), and a second protrusion (111g) connected in sequence. Both the first protrusion (111e) and the second protrusion (111g) include a first side plate (111e1), a top plate (111e2), and a second side plate (111e3) connected in sequence. The first side plate (111e1) is connected to the bottom plate (111f), and the second side plate (111e3) is connected to the first side plate (111e1). 1) Relatively, the second side plate (111e3) of the first protrusion (111e) is opposite to the second side plate (111e3) of the second protrusion (111g) to form the clearance opening (111d). The height of the second side plate (111e3) is less than the height of the first side plate (111e1) so that the insertion groove (111a) is formed between the first protrusion (111e) and the second protrusion (111g) and the bottom plate (111f).

9. The battery assembly according to claim 1, characterized in that, The at least one first cell (310) includes a first sub-cell and a second sub-cell arranged at intervals. The protection plate (200) includes a first strip plate (220) and a second strip plate (230) connected together. The first strip plate (220) is disposed between the first sub-cell and the second sub-cell. The first connection area (240) is disposed on the first strip plate (220). The tabs (311) of the first sub-cell and the tabs (311) of the second sub-cell are both electrically connected to the first connection area (240), and the two are staggered along the length direction of the first strip plate (220). The second strip plate (230) and the first cell (310) are arranged side by side along the extension direction of the first strip plate (220), and a portion of the second strip plate (230) extends to a position close to the second cell (320). The second connection area (250) is disposed on the second strip plate (230).

10. The battery assembly according to claim 1, characterized in that, The number of the first plug-in terminal (110), the second plug-in terminal (120), and the third plug-in terminal (210) are all at least two, and each includes a positive terminal and a negative terminal arranged at intervals. The adapter board (100) includes a board body (130), a first plug-in terminal (110), and a second plug-in terminal (120). The board body (130) includes a first strip portion (131) and a second strip portion (132) connected together. The extension direction of the first strip portion (131) is perpendicular to the extension direction of the second strip portion (132). The first plug-in terminal (110) is disposed on the first strip portion (131). The first strip portion (131) is located between the first battery cell (310) and the second battery cell (320). The second plug-in terminal (120) is disposed on the second strip portion (132), and the positive terminal and the negative terminal of the second plug-in terminal (120) are respectively located on opposite sides of the first strip portion (131).

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