Battery module and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack. The battery module comprises a battery cell unit, wherein a first end of the battery cell unit is provided with a first adapter; the bracket assembly comprises a bracket and a second adapter mounted on the bracket, the bracket is detachably connected with the battery cell unit, and the first adapter is electrically propped against the second adapter; the protection plate is arranged on one side, deviating from the battery cell unit, of the bracket, and the second adapter is electrically connected with the protection plate. The battery cell unit and the bracket are detachable, so that the battery cell unit and the protection plate are detachable, and the battery cell unit can be replaced and reused. And when the battery cell unit is damaged, the battery cell unit can be independently replaced, so that the use cost of a user is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery module and battery pack. Background Technology

[0002] As an energy device, battery packs can provide stable voltage and current and are widely used in drones, vacuum cleaners, cleaning products, lawnmowers and other fields.

[0003] Currently, battery packs consist of battery cells and protection boards, with the battery cell's tabs connected to the protection board via spot welding. However, once the battery cell is connected to the protection board, it cannot be disassembled. Therefore, when a battery cell is damaged, it cannot be replaced individually, resulting in high operating costs for users. Utility Model Content

[0004] This application provides a battery module and a battery pack, which solves the problem in related technologies that the battery cells cannot be disassembled after being connected to the protection board.

[0005] In a first aspect, embodiments of this application provide a battery module, including:

[0006] A battery cell unit, the first end of which has a first adapter;

[0007] A support assembly includes a support and a second adapter mounted on the support, the support being detachably connected to a battery cell, and the first adapter and the second adapter being electrically opposed.

[0008] The protection board is located on the side of the bracket away from the battery cell unit, and the second adapter is electrically connected to the protection board.

[0009] In one possible implementation, the battery cell unit includes a battery cell, a connector, and a first adapter. The battery cell has a tab at its end, the first adapter is detachably connected to the tab, and the connector fixes the first adapter to the battery cell.

[0010] In one possible implementation, the electrode includes a first connecting portion and a second connecting portion, one end of the first connecting portion is connected to the main body of the battery cell, and the other end of the first connecting portion is connected to the second connecting portion.

[0011] The first adapter includes a first adapter portion, a first connecting segment, a second connecting segment, and a third connecting segment connected in sequence. The first connecting segment is sandwiched between the first connecting portion and the second connecting portion, and the electrode tab is sandwiched between the second connecting segment and the third connecting segment. The first adapter portion and the second adapter are electrically opposed.

[0012] In one possible implementation, an elastic portion is provided on the side of the first adapter that is away from the battery cell, and the elastic portion is electrically opposed to the second adapter.

[0013] In one possible implementation, the connector is an injection-molded part that covers the end of the battery cell and the first adapter, with at least a portion of the first adapter facing away from the battery cell exposed from the connector and electrically opposed to the second adapter.

[0014] In one possible implementation, a slot is provided on one side of the bracket, and the first end of the battery cell extends into the slot;

[0015] A mounting groove is provided on the side of the bracket away from the battery cell unit. The mounting groove is connected to the slot. Part of the second adapter extends into the mounting groove and is electrically opposed to the first adapter.

[0016] In one possible implementation, the second adapter includes a second adapter portion, a first connecting piece, and a second connecting piece. The second adapter portion extends into the mounting groove and is electrically abutted against the first adapter. One end of the first connecting piece is connected to the second adapter portion, and the other end is connected to the second connecting piece. The first connecting piece passes through the protection plate, and the second connecting piece is electrically connected to the protection plate.

[0017] In one possible implementation, a bend is provided in the middle of the first connecting piece.

[0018] In one possible implementation, the battery module further includes an elastic component disposed between the bracket and the protection plate, with the side of the elastic component facing the bracket abutting against the second adapter.

[0019] In one possible implementation, the elastic component includes a support member and an elastic block. The support member is connected to the bracket, and a limiting groove is provided on one side of the support member facing the bracket. One end of the elastic block extends into the limiting groove, and the other end of the elastic block abuts against the second adapter.

[0020] Secondly, embodiments of this application provide a battery pack, including a housing and the aforementioned battery module. The housing includes a shell and a cover. The shell has a receiving cavity, the battery module is disposed in the receiving cavity, and the cover is placed on the shell and fixed to the shell.

[0021] In one possible implementation, the battery module further includes an elastic component disposed between the battery module's support and the protection plate, and the cover is provided with a support column that passes through the protection plate and abuts against the elastic component.

[0022] In one possible implementation, an elastic layer is provided between the sidewall of the housing and the battery module, and the elastic layer is attached to the battery module.

[0023] The battery module and battery pack provided in this application embodiment, by setting a first adapter at the first end of the cell unit, mounts the protection board on the bracket of the bracket assembly, and a second adapter of the bracket assembly is mounted on the bracket and electrically connected to the protection board. The bracket and the cell unit are detachably connected, and after the bracket and the cell unit are connected, the first adapter and the second adapter of the cell unit are electrically abutted. In this way, the cell unit and the bracket are detachable, and the cell unit and the protection board are also detachable, allowing the cell unit to be replaced and reused. When the cell unit is damaged, it can be replaced individually, reducing the user's operating costs. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the battery module provided in an embodiment of this application;

[0026] Figure 2 for Figure 1 Exploded view of the battery module shown;

[0027] Figure 3 This is a schematic diagram showing the connection between the support assembly and the battery cell unit provided in the embodiments of this application;

[0028] Figure 4 This is a partial cross-sectional view of the battery pack provided in an embodiment of this application;

[0029] Figure 5 A schematic diagram showing the bracket facing the battery cell unit side as provided in an embodiment of this application;

[0030] Figure 6 A schematic diagram showing the bracket facing the protective plate side provided in an embodiment of this application;

[0031] Figure 7 An exploded view of the battery cell unit provided in the embodiments of this application;

[0032] Figure 8 This is a schematic diagram of the structure of the battery cell unit provided in the embodiments of this application;

[0033] Figure 9 This is a schematic diagram of the first adapter before bending, provided in an embodiment of this application.

[0034] Figure 10 This is a schematic diagram of the first adapter after bending, provided in an embodiment of this application.

[0035] Figure 11 A schematic diagram illustrating the connection process between the first adapter and the electrode provided in an embodiment of this application;

[0036] Figure 12 This is a schematic diagram showing the first adapter connected to the electrode tab in an embodiment of this application.

[0037] Figure 13 This is a schematic diagram of the structure of the first type of second adapter before bending, provided in an embodiment of this application.

[0038] Figure 14 This is a schematic diagram of the structure of the first type of second adapter after bending, provided in an embodiment of this application;

[0039] Figure 15 for Figure 14 Side view of the second adapter shown;

[0040] Figure 16 This is a schematic diagram of the structure of the second type of adapter before bending, provided in the embodiments of this application;

[0041] Figure 17 This is a schematic diagram of the structure of the second type of second adapter after bending, provided in the embodiments of this application;

[0042] Figure 18 for Figure 17 Side view of the second adapter shown;

[0043] Figure 19 This is a schematic diagram of the structure of the elastic component provided in the embodiments of this application;

[0044] Figure 20 An exploded view of the elastic component provided in the embodiments of this application;

[0045] Figure 21 This is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0046] Figure 22 Explosion of the battery pack provided in the embodiments of this application Figure 1 ;

[0047] Figure 23 Explosion of the battery pack provided in the embodiments of this application Figure 2 ;

[0048] Figure 24 This is a schematic diagram of the structure of the cover provided in an embodiment of this application.

[0049] Explanation of reference numerals in the attached figures:

[0050] 10-Battery module;

[0051] 100-Battery cell unit; 110-Battery cell; 111-Electrode tab; 120-Connector; 130-First adapter; 131-First adapter part; 1311-Elastic part; 132-First connecting section; 133-Second connecting section; 134-Third connecting section; 135-Protrusion;

[0052] 210-Bracket; 211-Slot; 212-Mounting slot; 220-Second adapter; 221-Second adapter part; 222-First connecting piece; 2221-Bending part; 223-Second connecting piece;

[0053] 300 - Protection board; 310 - Pad; 320 - Through hole; 330 - Hole position;

[0054] 400 - Elastic component; 410 - Support component; 411 - Limiting groove; 420 - Elastic block;

[0055] 500 - First foam;

[0056] 20 - Shell;

[0057] 30 - Cover; 31 - Support column;

[0058] 40 - Elastic layer.

[0059] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0061] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0062] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0063] The terms “first,” “second,” and “third” (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0064] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0065] In current technology, battery packs generally use spot welding between the cell tabs and the protection board, and the cells are not replaceable. This is the case in battery packs used in drones, vacuum cleaners, cleaning appliances, lawnmowers, and other similar applications. Taking drone batteries as an example, current drone battery packs on the market all have built-in cells, and the cell tabs and protection board are mainly connected by spot welding. Accidents of cell tab breakage due to high-frequency vibrations in terminal devices occur frequently, and because the cells cannot be removed and replaced, cell damage not only causes economic losses for consumers, leading to higher user costs, but also poses significant challenges to environmental protection and after-sales service for manufacturers due to the non-replaceability and recyclability of the cells, resulting in high after-sales costs.

[0066] After repeated consideration and verification, the inventors discovered that if the protection board is mounted on a bracket, and an adapter electrically connected to the protection board is installed on the bracket, the bracket and the battery cell unit can be detachably connected. After the bracket and the battery cell unit are connected, the adapter on the battery cell unit and the adapter on the bracket are electrically opposed, and the electrical connection between the battery cell unit and the protection board is achieved through the two adapters. Because the battery cell unit and the bracket are detachable, a spot-welding-free connection between the battery cell unit and the protection board is achieved, and the battery cell unit can be replaced and reused. When the battery cell unit is damaged, it can be replaced individually, reducing the user's operating costs.

[0067] In view of this, the inventors designed a battery module and battery pack. The battery module has a first adapter at the first end of the cell unit and a second adapter mounted on a bracket. The bracket and the cell unit are detachably connected, and the first and second adapters are electrically opposed. A protection board is mounted on the bracket and is electrically connected to the second adapter. Because the cell unit and the bracket are detachable, a spot-welding-free connection between the cell unit and the protection board is achieved. The cell unit can be replaced and reused, reducing user operating costs.

[0068] The technical solutions of the battery module and battery pack provided in the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0069] Reference Figures 1 to 4 As shown, the battery module 10 (core pack) provided in this embodiment includes a cell unit 100, a support assembly, and a protection board 300. The cell unit 100 has a first adapter 130 at its first end. The support assembly includes a support 210 and a second adapter 220 mounted on the support 210. The support 210 is detachably connected to the cell unit 100, and the first adapter 130 and the second adapter 220 are electrically abutting each other. The protection board 300 is disposed on the side of the support 210 facing away from the cell unit 100, and the second adapter 220 is electrically connected to the protection board 300.

[0070] Schematic, there are two first adapters 130, which are arranged side-by-side at the first end of the cell unit 100. The two first adapters 130 can serve as the positive and negative terminals of the cell unit 100, respectively. There are multiple second adapters 220, with each of the two first adapters 130 electrically offset from a different second adapter 220. For example, nickel sheets can be used as the first adapter 130 and the second adapter 220, respectively.

[0071] Schematic illustration: The protection board 300 can be locked onto the bracket 210 using fasteners. In one possible implementation, the protection board 300 is provided with solder pads 310, and the second adapter 220 can be fixed to the solder pads 310 by spot welding to achieve electrical connection between the second adapter 220 and the protection board 300. The first adapter 130 and the second adapter 220 can be made of metal materials respectively. When the first adapter 130 and the second adapter 220 are electrically abutted, the cell unit 100 and the protection board 300 are connected and current flows through the first adapter 130 and the second adapter 220. It is worth mentioning that the battery module 10 provided in this embodiment has a protection board 300 that can perform current flow operations such as voltage sampling and input / output. The battery module 10 does not have a voltage sampling plate, which reduces the size of the battery module 10, which is beneficial for compressing the overall size of the battery pack, reducing excessive voltage sampling connection materials, reducing assembly steps, and saving material costs.

[0072] The number of battery cell units 100 is unrestricted and can be stacked infinitely as needed, with no upper limit on the design quantity. When there are multiple battery cell units 100, the same second adapter 220 can electrically cancel out one or more first adapters 130 to achieve multiple series and multiple parallel connections between multiple battery cell units 100. Figure 2 As shown, when there are multiple battery cell units 100, a first foam 500 is provided between adjacent battery cell units 100, and the first foam 500 can be glued and fixed to the battery cell unit 100.

[0073] The battery module 10 provided in this embodiment uses a first adapter 130 at the first end of the cell unit 100 to mount the protection board 300 on the bracket 210 of the bracket assembly. A second adapter 220 of the bracket assembly is mounted on the bracket 210 and electrically connected to the protection board 300. The bracket and the cell unit are detachably connected. After the bracket and the cell unit are connected, the first adapter 130 and the second adapter 220 of the cell unit 100 are electrically abutted. This allows for detachment between the cell unit 100 and the bracket 210, and also enables detachment between the cell unit 100 and the protection board 300. The cell unit 100 can be replaced, recycled, and reused. When the cell unit 100 is damaged, it can be replaced individually without rendering the entire battery module 10 unusable, reducing user costs and lowering rework and after-sales costs.

[0074] In one embodiment, Figure 7 and Figure 8As shown, the battery cell unit 100 includes a battery cell 110, a connector 120, and a first adapter 130. The battery cell 110 has a tab 111 at one end, and the first adapter 130 is detachably connected to the tab 111. The connector 120 fixes the first adapter 130 to the battery cell 110.

[0075] Understandably, when the first adapter 130 is connected to the electrode 111, the first adapter 130 and the electrode 111 are electrically connected. For example, the first adapter 130 and the corresponding electrode 111 can be fixed by magnetic attraction or by using a clamp, etc., which is not the only limitation.

[0076] For example, the connector 120 is connected to both the main body of the battery cell 110 and the first adapter 130 to fix the first adapter 130 to the battery cell 110. By fixing the first adapter 130 to the battery cell 110 through the connector 120, the first adapter 130 is prevented from moving relative to the battery cell 110 after it is connected to the electrode 111, thereby preventing the first adapter 130 from pulling on the electrode 111 and causing damage to the electrode 111.

[0077] In this structure, the connection between the first adapter 130 and the electrode 111 will not damage the electrode 111, thus achieving zero damage to the electrode 111 and enabling the recycling and reuse of the battery cell 110. No spot welding is required between the first adapter 130 and the electrode 111, avoiding problems such as incomplete soldering, desoldering, misaligned soldering, and spatter.

[0078] In other embodiments, the first adapter 130 may also be connected to the tab 111 by means of fixed connection such as welding or riveting, which is not the only one.

[0079] like Figure 7-12 As shown, the tab 111 includes a first connecting portion and a second connecting portion. One end of the first connecting portion is connected to the main body of the battery cell 110, and the other end of the first connecting portion is connected to the second connecting portion. The first adapter 130 includes a first adapter portion 131, a first connecting segment 132, a second connecting segment 133, and a third connecting segment 134 connected in sequence. The first connecting segment 132 is sandwiched between the first connecting portion and the second connecting portion. The tab 111 is sandwiched between the second connecting segment 133 and the third connecting segment 134, and the first adapter portion 131 is electrically abutted against the second adapter 220.

[0080] That is to say, the middle part of the tab 111 can be bent to form a first connecting part and a second connecting part, and the tab 111 can be bent to clamp the first connecting segment 132. Figure 9 and Figure 10As shown, the first adapter 131 can be a frame-like structure, and the side of the first adapter 131 facing away from the main body of the battery cell 110 can electrically abut against the second adapter 220. The first connecting segment 132, the second connecting segment 133, and the third connecting segment 134 are all sheet-like structures, with the first connecting segment 132 and the third connecting segment 134 located on adjacent sides of the second connecting segment 133, respectively. When the first connecting segment and the second connecting segment of the tab 111 clamp the first connecting segment 132, the first adapter 130 can be bent so that the second connecting segment 133 and the third connecting segment 134 of the first adapter 130 clamp the tab 111.

[0081] In one possible implementation, the second connecting segment 133 and / or the third connecting segment 134 are provided with protrusions 135, which have a certain degree of elasticity. The second connecting segment 133 and / or the third connecting segment 134 contact the tab 111 through the protrusions 135. When the terminal device vibrates, the elastic deformation of the protrusions 135 can ensure a reliable electrical connection between the tab 111 and the first adapter 130.

[0082] With the above configuration, the first adapter 130 is a bendable and detachable structure. Through the mutual clamping between the electrode tab 111 and the first adapter 130, the locking, limiting and fixing between the electrode tab 111 and the first adapter 130 are realized. The reliability of the connection between the electrode tab 111 and the first adapter 130 is ensured without welding connection.

[0083] In one specific implementation, such as Figure 7-12 As shown, the first adapter 131 has an elastic part 1311 on the side opposite to the battery cell 110, and the elastic part 1311 is electrically opposed to the second adapter 220.

[0084] The elastic portion 1311 can be a protrusion or other elastic structure extending from the first adapter portion 131. When the first adapter 130 and the second adapter 220 are electrically abutted, the elastic portion 1311 on the first adapter portion 131 makes reliable contact with the second adapter 220. It is understood that the elastic portion 1311 can elastically deform relative to the first adapter portion 131. This elastic deformation ensures reliable contact between the first adapter portion 131 and the second adapter portion 221, preventing poor contact and overcurrent issues between the battery cell unit 100 and the protection board 300.

[0085] In one possible implementation, such as Figure 7 and Figure 8As shown, connector 120 is an injection molded part. Connector 120 covers the end of battery cell 110 and first adapter 130. At least a portion of the first adapter 130 on the side away from battery cell 110 is exposed from connector 120 and electrically resists the second adapter 220.

[0086] Specifically, the connector 120 is a low-temperature injection molded part, and the connector 120 will not damage the battery cell 110 during the injection molding process. During the assembly of the battery cell unit 100, after the tab 111 of the battery cell 110 is connected to the first adapter 130, the connector 120 is formed by injection molding at the end of the battery cell 110 to solidify the battery cell unit 100. When the first adapter 130 includes a first adapter portion 131, a first connecting section 132, a second connecting section 133, and a third connecting section 134, the side of the first adapter portion 131 facing away from the main body of the battery cell 110 is exposed from the connector 120.

[0087] The above configuration can ensure the reliability of the connection between the first adapter 130 and the battery cell 110, and the connector 120 covers the tab 111 of the battery cell 110 and part of the first adapter 130, which can protect the tab 111.

[0088] In one embodiment, Figure 2 , Figure 3 and Figure 6 As shown, a slot 211 is provided on one side of the bracket 210, and the first end of the battery cell 100 extends into the slot 211.

[0089] Indicative, such as Figure 2 , Figure 5 and Figure 6 As shown, a plurality of parallel, spaced-apart partitions are provided on one side of the bracket 210, and the gap between two adjacent partitions defines a slot 211. When the end of the battery cell 100 extends into the slot 211, the battery cell 100 and the bracket 210 can be fixed by an interference fit. For example, the number of slots 211 on the bracket 210 is not less than the number of battery cells 100, and the end of one battery cell 100 can extend into one slot 211. The bracket 210 is connected to the battery cell 100 through the slots 211, which facilitates the installation and removal of the battery cell 100.

[0090] The bracket 210 has a mounting groove 212 on the side opposite to the battery cell unit 100. The mounting groove 212 is connected to the slot 211, and part of the second adapter 220 extends into the mounting groove 212 and is electrically opposed to the first adapter 130.

[0091] The mounting groove 212 can be connected to one slot 211 or multiple slots 211, so that the portion of the second adapter 220 located in the mounting groove 212 can be electrically opposed to one first adapter 130 or multiple first adapters 130.

[0092] Schematic, the cross-sectional shape and size of the mounting groove 212 match the portion of the second adapter 220 that extends into the mounting groove 212. The mounting groove 212 can limit the second adapter 220, preventing it from moving relative to the bracket 210 in a direction parallel to the protective plate 300. Furthermore, the mounting groove 212 communicates with the slot 211, ensuring that the second adapter 220 on the bracket 210 can reliably electrically abut against the first adapter 130.

[0093] In other embodiments, the battery cell unit 100 and the bracket 210 may also be fixed by a snap-fit ​​connection or other detachable connection, which is not the only one.

[0094] In a specific embodiment, Figure 3 , Figure 6 and Figures 13-18 As shown, the second adapter 220 includes a second adapter portion 221, a first connecting piece 222, and a second connecting piece 223. The second adapter portion 221 extends into the mounting groove 212 and electrically abuts against the first adapter 130. One end of the first connecting piece 222 is connected to the second adapter portion 221, and the other end is connected to the second connecting piece 223. The first connecting piece 222 passes through the protective plate 300, and the second connecting piece 223 is electrically connected to the protective plate 300.

[0095] Schematic illustration: the second adapter 220 can be formed by bending a metal sheet. After the second adapter 221 extends into the mounting groove 212, the mounting groove 212 can limit the second adapter 221. The extending direction of the first connecting piece 222 can be perpendicular to the extending direction of the protective plate 300. When the second adapter 220 is connected to the bracket 210, the extending direction of the second connecting piece 223 is parallel to the extending direction of the first connecting piece 222. Figure 1 As shown, the protection plate 300 can be provided with holes 330 for the second adapter 220 to pass through. After the first connecting piece 222 passes through the holes 330 on the protection plate 300, the second adapter 220 can be bent so that the extension direction of the second connecting piece 223 is perpendicular to the extension direction of the first connecting piece 222. After bending the second adapter 220, the second connecting piece 223 of the second adapter 220 can be attached to the pad 310 on the side of the protection plate 300 away from the battery cell unit 100. The second connecting piece 223 can be fixed to the pad 310 by electric welding to realize the electrical connection between the second adapter 220 and the protection plate 300.

[0096] With the above settings, during the assembly process of the battery module 10, the second adapter 220 can be installed on the bracket 210 first, then the protection board 300 can be connected to the bracket 210, and then the protection board 300 can be electrically connected to the bracket 210. The connection between the bracket 210, the second adapter 220 and the protection board 300 is relatively easy.

[0097] In one specific implementation, such as Figures 13-18 As shown, a bent portion 2221 is provided in the middle of the first connecting piece 222.

[0098] The bending portion 2221 can form an approximate "V" shape. When the terminal device vibrates, the bending portion 2221 can elastically deform. The elastic deformation of the bending portion 2221 can play a buffering role, ensuring a reliable electrical connection between the second adapter 220 and the protection plate 300 while preventing the first connecting piece 222 of the second adapter 220 from breaking.

[0099] In one embodiment, Figure 2 , Figure 4 , Figure 19 and Figure 20 As shown, the battery module 10 also includes an elastic component 400, which is disposed between the bracket 210 and the protection plate 300. The side of the elastic component 400 facing the bracket 210 abuts against the second adapter 220.

[0100] For example, the elastic component 400 can be connected to the bracket 210. When the elastic component 400 abuts against the second adapter 220, it can apply a force away from the protective plate 300 to the second adapter 220. The elastic force applied by the elastic component 400 can ensure that the first adapter 130 and the second adapter 220 always remain in a close fit, avoiding poor contact between the first adapter 130 and the second adapter 220. In addition, the application of the elastic component 400 can offset the vibration from the terminal device and avoid hard impacts caused by the high-frequency vibration of the terminal device causing the battery module 10 to shake inside the battery pack casing.

[0101] It is worth mentioning that when the second adapter 220 includes the second adapter portion 221, the first connecting piece 222 and the second connecting piece 223, the elastic component 400 abuts against the side of the second adapter portion 221 away from the battery cell unit 100, and the first connecting piece 222 is located on the side of the elastic component 400. The elastic component 400 will not affect the electrical connection between the second adapter 220 and the protection board 300.

[0102] In a specific embodiment, Figure 2 , Figure 4 , Figure 19 and Figure 20As shown, the elastic component 400 includes a support member 410 and an elastic block 420. The support member 410 is connected to the bracket 210. A limiting groove 411 is provided on the side of the support member 410 facing the bracket 210. One end of the elastic block 420 extends into the limiting groove 411, and the other end of the elastic block 420 abuts against the second adapter 220.

[0103] For example, fasteners can be used to fix the support 410 to the bracket 210. Optionally, double-sided adhesive can be provided at one end of the elastic block 420. After one end of the elastic block 420 extends into the limiting groove 411, it can be fixed to the support 410 by the double-sided adhesive. The shape and size of the limiting groove 411 match the elastic block 420. When the end of the elastic block 420 extends into the limiting groove 411, the limiting groove 411 can effectively limit the elastic block 420, preventing the elastic block 420 from displacing and ensuring that the elastic block 420 can reliably abut against the second adapter 220. The elastic block 420 is made of an elastic material such as rubber. The elastic deformation of the elastic block 420 applies elastic force to the second adapter 220, ensuring reliable contact between the second adapter 220 and the first adapter 130. The number of elastic blocks 420 can be the same as the number of second adapters 220, with each elastic block 420 corresponding to and abutting against each second adapter 220.

[0104] When the second adapter 220 includes a second adapter portion 221, a first connecting piece 222, and a second connecting piece 223, the edge of the second adapter portion 221 may be provided with a flange extending toward the protective plate 300. The end of the elastic block 420 is located between the flanges on the second adapter portion 221 and abuts against the second adapter portion 221. The flanges on the second adapter portion 221 can further limit the elastic block 420 and prevent the second adapter portion 221 from detaching from the elastic block 420.

[0105] In other embodiments, the elastic component 400 may be provided with an elastic element, such as a spring, the end of which abuts against the second adapter 220 to apply a spring force to the second adapter 220.

[0106] This application also provides a battery pack, such as Figures 21-24 As shown, the battery pack includes an outer shell and the aforementioned battery module 10. The outer shell includes a housing 20 and a cover 30. The housing 20 is provided with a receiving cavity, and the battery module 10 is disposed in the receiving cavity. The cover 30 covers the housing 20 and is fixed to the housing 20.

[0107] The cover 30, when placed on the housing 20, can seal the receiving cavity of the housing 20. For example, after the cover 30 is placed on the housing 20, the cover 30 can be locked to the housing 20 using fasteners.

[0108] The battery pack provided in this application uses the aforementioned battery module 10, and the battery cells 110 in the battery pack can be disassembled. The battery cells 110 can be disassembled and replaced after being damaged. At the same time, the battery cells 110 can be replaced and recycled, which reduces the usage cost of the battery pack.

[0109] In one embodiment, Figure 4 , Figure 23 and Figure 24 As shown, the battery module 10 also includes an elastic component 400. The elastic component 400 is disposed between the bracket 210 and the protection plate 300 of the battery module 10, and the cover 30 is provided with a support column 31, which passes through the protection plate 300 and abuts against the elastic component 400.

[0110] The elastic component 400 abuts against the second adapter 220 to press the second adapter 220 against the first adapter 130. Multiple support pillars 31 can be integrally formed onto the cover 30. The protective plate 300 can have through holes 320 for the support pillars 31 to pass through, and each support pillar 31 abuts against the elastic component 400 after passing through the protective plate 300. When the elastic component 400 includes a support member 410 and an elastic block 420, the end of the support pillar 31 away from the cover 30 abuts against the end of the support member 410 away from the elastic block 420.

[0111] With the above configuration, after the cover 30 is placed on the housing 20, the support column 31 on it can press the elastic component 400 and the second adapter 220 together, further preventing poor contact between the first adapter 130 and the second adapter 220.

[0112] In one embodiment, Figure 22 As shown, an elastic layer 40 is provided between the side wall of the housing 20 and the battery module 10, and the elastic layer 40 is attached to the battery module 10.

[0113] Foam can be used as the elastic layer 40, and double-sided adhesive can be applied to the foam to fix it to the battery module 10. Figure 22 As shown, each of the four side walls of the battery module 10 is provided with an elastic layer 40. When the battery module 10 is placed into the receiving cavity of the housing 20, the side walls of the housing 20 and the side walls of the battery module 10 together compress the elastic layer 40, and the battery module 10 is fixed in the receiving cavity by the elastic deformation of the elastic layer 40.

[0114] In related technologies, after the battery module 10 is placed in the housing, the battery pack needs to be potted with glue to fix the battery module 10 in the housing. However, potting not only increases the weight of the battery and terminal device, but also reduces the energy density of the battery pack, resulting in a decline in user experience.

[0115] The battery pack provided in this embodiment can fix the battery module 10 in the shell without potting, reducing the overall weight of the battery pack, increasing energy density, and improving the user experience. At the same time, the elastic layer 40 can also protect the battery module 10, so that the battery module 10 is not easily damaged by impact when the terminal device is vibrated.

[0116] The following is a brief description of the battery pack installation and cell 110 disassembly process with reference to the accompanying drawings, so that those skilled in the art can better understand the technical solution of this application.

[0117] The first adapter part, 130, is formed from incoming material. Figure 9 The first adapter, after being bent at 130 degrees, is as follows: Figure 10 The first adapter 130 and the battery cell 110 and the tab 111 are bent and assembled as follows: Figure 12 The semi-finished product is cured by low-temperature injection molding into a form such as Figure 8 The battery cell unit 100.

[0118] Multiple battery cell units 100 are assembled into a battery module 10 semi-finished product using a first foam 500, and the connectors 120 at the ends of the multiple battery cell units 100 are inserted into the slots 211 of the bracket 210 and pressed tightly together. Figure 3 .

[0119] Second adapter 220 material incoming Figure 13 and Figure 16 Place the second adapter portion 221 of the second adapter 220 into the mounting slot 212 of the bracket 210, and make the second adapter 220 fit against the two elastic portions 1311 on the first adapter 130. Pass the unbent first connecting piece 222 and the second connecting piece 223 of the second adapter 220 through the hole 330 of the protective plate 300, bend the second adapter 220 so that the second connecting piece 223 fits against the solder pad 310 on the protective plate 300, and complete the spot welding. Use fasteners to lock the protective plate 300 onto the bracket 210, completing the assembly of the battery module 10. Figure 1 .

[0120] Place the battery module 10 into the receiving cavity of the housing 20 and press it down completely. Align the four support posts 31 on the cover 30 with the four through holes 320 on the protection plate 300 and insert them, so that the four support posts 31 on the cover 30 fit tightly against the support member 410 of the elastic component 400. Use fasteners to lock the cover 30 to the housing 20, completing the assembly of the battery pack (e.g., ...). Figure 23 and Figure 21 ).

[0121] When a cell 110 in the battery pack is damaged or malfunctions, the battery pack is discharged, and the fasteners between the casing 20 and the cover 30 are removed. The elastic layer 40 (foam) on the side of the battery module 10 is removed, and the malfunctioning cell 110 is taken out of the battery module 10 without removing the protection board 300, adapter, bracket 210, etc. A new good cell 110 is then replaced, thus achieving the removal and replacement of the cell 110.

[0122] After eliminating the faulty cell 110 or replacing it with a good one, the removed elastic layer 40 is reattached or replaced. The battery module 10 is then installed into the housing 20, and the cover 30 is secured with fasteners. This allows for the recycling of the entire battery pack, reducing rework and after-sales costs.

[0123] 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 module (10), characterized in that, include: A battery cell unit (100), the first end of which has a first adapter (130). The bracket assembly includes a bracket (210) and a second adapter (220) mounted on the bracket (210), the bracket (210) being detachably connected to the battery cell unit (100), and the first adapter (130) and the second adapter (220) being electrically opposed. A protection plate (300) is disposed on the side of the bracket (210) away from the battery cell unit (100), and the second adapter (220) is electrically connected to the protection plate (300).

2. The battery module (10) according to claim 1, characterized in that, The battery cell unit (100) includes a battery cell (110), a connector (120) and a first adapter (130). The battery cell (110) has a tab (111) at its end. The first adapter (130) is detachably connected to the tab (111). The connector (120) fixes the first adapter (130) to the battery cell (110).

3. The battery module (10) according to claim 2, characterized in that, The tab (111) includes a first connecting part and a second connecting part. One end of the first connecting part is connected to the main body of the battery cell (110), and the other end of the first connecting part is connected to the second connecting part. The first adapter (130) includes a first adapter part (131), a first connecting segment (132), a second connecting segment (133) and a third connecting segment (134) connected in sequence. The first connecting segment (132) is sandwiched between the first connecting part and the second connecting part. The tab (111) is sandwiched between the second connecting segment (133) and the third connecting segment (134). The first adapter part (131) and the second adapter (220) are electrically opposed.

4. The battery module (10) according to claim 3, characterized in that, The first adapter (131) has an elastic part (1311) on the side opposite to the battery cell (110), and the elastic part (1311) is electrically opposed to the second adapter (220).

5. The battery module (10) according to claim 2, characterized in that, The connector (120) is an injection molded part. The connector (120) covers the end of the battery cell (110) and the first adapter (130). At least a portion of the first adapter (130) on the side away from the battery cell (110) is exposed from the connector (120) and electrically opposed to the second adapter (220).

6. The battery module (10) according to claim 1, characterized in that, A slot (211) is provided on one side of the bracket (210), and the first end of the battery cell (100) extends into the slot (211); The bracket (210) has a mounting groove (212) on the side away from the battery cell unit (100). The mounting groove (212) is connected to the slot (211). A portion of the second adapter (220) extends into the mounting groove (212) and is electrically opposed to the first adapter (130).

7. The battery module (10) according to claim 6, characterized in that, The second adapter (220) includes a second adapter part (221), a first connecting piece (222), and a second connecting piece (223). The second adapter part (221) extends into the mounting groove (212) and is electrically abutted against the first adapter (130). One end of the first connecting piece (222) is connected to the second adapter part (221), and the other end is connected to the second connecting piece (223). The first connecting piece (222) passes through the protection plate (300), and the second connecting piece (223) is electrically connected to the protection plate (300).

8. The battery module (10) according to claim 7, characterized in that, The first connecting piece (222) has a bent portion (2221) in the middle.

9. The battery module (10) according to any one of claims 1-8, characterized in that, The battery module (10) further includes an elastic component (400), which is disposed between the bracket (210) and the protection plate (300). The side of the elastic component (400) facing the bracket (210) abuts against the second adapter (220).

10. The battery module (10) according to claim 9, characterized in that, The elastic component (400) includes a support (410) and an elastic block (420). The support (410) is connected to the bracket (210). The support (410) has a limiting groove (411) on one side facing the bracket (210). One end of the elastic block (420) extends into the limiting groove (411), and the other end of the elastic block (420) abuts against the second adapter (220).

11. A battery pack, characterized in that, The device includes a housing and a battery module (10) as described in any one of claims 1-10. The housing includes a shell (20) and a cover (30). The shell (20) is provided with a receiving cavity, and the battery module (10) is disposed in the receiving cavity. The cover (30) covers the shell (20) and is fixed to the shell (20).

12. The battery pack according to claim 11, characterized in that, The battery module (10) also includes an elastic component (400), which is disposed between the bracket (210) and the protective plate (300) of the battery module (10). The cover (30) is provided with a support column (31), which passes through the protective plate (300) and abuts against the elastic component (400).

13. The battery pack according to claim 11, characterized in that, An elastic layer (40) is provided between the side wall of the housing (20) and the battery module (10), and the elastic layer (40) is attached to the battery module (10).

Images