Battery module and terminal equipment

Abstract

The utility model provides a battery module and terminal equipment, and belongs to the technical field of batteries. The battery module comprises a battery cell and a protection plate assembly, a tab is arranged at the head of the battery cell; the protection plate assembly comprises a flexible circuit board and a connector; the flexible circuit board comprises a first part and a second part; the first part is the same as the head end surface of the battery cell in shape and is parallel to the head end surface of the battery cell; the second part is connected with one side of the first part, and the connector is located on the second part; the first part comprises a first surface facing the battery cell and a second surface opposite to the battery cell, at least one of the first surface and the second surface is provided with a welding part, and the welding part is welded with the tab. According to the battery module disclosed by the utility model, the space occupied by the protection plate assembly on the head part of the battery cell is small, so that the volume of the battery cell can be increased, and the capacity of the battery module can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery module and terminal equipment. BACKGROUND

[0002] Battery module is the necessary device of terminal equipment such as mobile phone, directly determines the endurance performance of terminal equipment. Battery module usually includes cell and protection board constitution, and the protection board is encapsulated in the head of cell, and the tab of cell and the nickel sheet or nickel brick of protection board are welded together, and the protection board not only plays the role of protecting cell, but also is used to realize the connection of cell and external circuit.

[0003] In the related art, the nickel sheet and the tab of the protection plate need to be bent multiple times, which occupies the space of the head of the cell, limits the volume of the cell, and thus limits the capacity of the battery module. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of battery module and terminal equipment, can solve the problem that the nickel sheet and the tab of protection plate need to be bent multiple times, which occupies the space of the head of the cell, limits the volume of the cell.

[0005] The technical solution is as follows:

[0006] On the one hand, a battery module is provided, which includes a cell and a protection plate assembly.

[0007] The head of the cell is provided with a tab.

[0008] The protection plate assembly includes a flexible circuit board and a connector.

[0009] The flexible circuit board includes a first part and a second part.

[0010] The first part is the same shape as the head end surface of the cell, and the first part is parallel to the head end surface of the cell. The second part is connected to one side of the first part, and the connector is located on the second part.

[0011] The first part includes a first surface facing the cell and a second surface facing away from the cell. At least one of the first surface and the second surface is provided with a welding portion, and the welding portion is welded to the tab.

[0012] In some embodiments, the welding portion is a partial selective plating formed structure of the first surface or the second surface, and the thickness of the welding portion is greater than or equal to a target value.

[0013] In some embodiments, the thickness of the welding portion is greater than or equal to 50 microns.

[0014] In some embodiments, when the first surface is provided with the welding part, the tab comprises a first flat plate part;

[0015] The first flat plate part is located between the first surface and the head end surface of the battery cell, and the first flat plate part is welded with the pole of the battery cell and the welding part respectively.

[0016] In some embodiments, a wiring vacuum area is provided in the first part, and the position of the wiring vacuum area corresponds to the position of the welding part.

[0017] In some embodiments, when the second surface is provided with the welding part, the tab comprises a first flat plate part, a U-shaped bending part and a second flat plate part;

[0018] The first flat plate part is located between the first surface and the head end surface of the battery cell, and the first flat plate part is welded with the pole of the battery cell and the welding part respectively.

[0019] The second flat plate part is located on the second surface, and the second flat plate part is welded with the welding part;

[0020] The U-shaped bending part is located on one side edge of the flexible circuit board, and the U-shaped bending part is connected with the first flat plate part and the second flat plate part respectively.

[0021] In some embodiments, the protection plate assembly further comprises a reinforcing metal sheet, which is attached to the second surface;

[0022] The reinforcing metal sheet is provided with a relieved hollow area corresponding to the position of the welding part, and the reinforcing metal sheet is insulated and spaced from the welding part and the tab respectively.

[0023] In some embodiments, the relieved hollow area is filled with insulating glue.

[0024] In some embodiments, when the first surface is provided with the welding part, the welding part is located in the orthographic projection of the relieved hollow area on the first surface;

[0025] And / or,

[0026] When the second surface is provided with the welding part, and the tab comprises a second flat plate part, the welding part and the corresponding second flat plate part are located in the relieved hollow area.

[0027] In another aspect, a terminal device is provided, which adopts the battery module of the utility model.

[0028] The technical scheme provided by the utility model has at least the following beneficial effects:

[0029] The battery module of the utility model discloses, the protection board subassembly adopts the flexible circuit board as the substrate, and the protection board subassembly has smaller thickness, and the first part of the flexible circuit board is arranged in parallel with the head end face of the battery cell, and the first part has the welding portion that can weld the pole lug of the battery cell, and the second part of the flexible circuit board can be connected with external circuit through the connector, and the pole lug is directly welded and connected with the welding portion, and it is not necessary to carry out multiple bending operation, further compresses the thickness, and the space of the head of the battery cell is smaller, so that the volume of the battery cell can be increased, and then the capacity of the battery module is favorably improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawing needed to be used in the embodiment description, obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0031] Figure 1 It is the structure schematic diagram of the battery module provided by the utility model embodiment;

[0032] Figure 2 It is the structure schematic diagram of the battery module provided by another embodiment of the utility model;

[0033] Figure 3 It is the partial structure sectional view of the battery module provided by the utility model embodiment;

[0034] Figure 4 It is the partial structure sectional view of the battery module provided by another embodiment of the utility model;

[0035] Figure 5 It is the partial structure schematic diagram of the battery module provided by the utility model embodiment;

[0036] Figure 6 It is the partial structure sectional view of the battery module provided by the utility model embodiment.

[0037] The reference numerals in the drawing respectively indicate as follows:

[0038] 1, battery cell;

[0039] 11, pole lug; 111, first flat plate part; 112, U-shaped bending part; 113, second flat plate part;

[0040] 2, protection board subassembly;

[0041] 21, flexible circuit board; 211, first part; 2111, first surface; 2112, second surface; 2113, welding portion; 2114, wiring vacuum area; 212, second part; 22, connector;

[0042] 3. Reinforcing metal sheet

[0043] 31. Avoidance hollowed-out area. DETAILED DESCRIPTION

[0044] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, unless otherwise indicated, like numbers in the different drawings represent similar or analogous elements. The following exemplary embodiments described therein represent the best attempts at non-limiting examples of the devices and methods in accordance with some aspects of the present disclosure, as detailed in the claims appended hereto.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate relative or positional relationships based on the orientations or positions shown in the drawings, and are merely used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Figure 1

[0046] It should be understood that in the present application, "electrically connected" can be understood as physical contact and electrical conduction of components; it can also be understood as a form of connection between different components through a physical circuit such as a copper foil or a wire on a printed circuit board (PCB) that can transmit electrical signals. "Communication connection" can refer to electrical signal transmission, including wireless communication connection and wired communication connection. Wireless communication connection does not require a physical medium and is not a connection relationship that limits the product structure. "Connection" and "connected" can refer to a mechanical connection relationship or a physical connection relationship, i.e., A and B are connected or A and B are connected, which means that there is a fastening component (such as a screw, bolt, rivet, etc.) between A and B, or A and B are in contact with each other and A and B are difficult to separate.

[0047] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by one of ordinary skill in the art.

[0048] In order to make the purposes, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0049] In combination with Figure 1 ​and Figure 2 The battery module provided by the embodiment includes a battery cell 1 and a protection plate assembly 2.

[0050] The head of the battery cell 1 is provided with a tab 11; the protection plate assembly 2 includes a flexible circuit board 21 and a connector 22; the flexible circuit board 21 includes a first part 211 and a second part 212; the first part 211 is the same as the shape of the head end face of the battery cell 1, and the first part 211 is parallel to the head end face of the battery cell 1; the second part 212 is connected to one side of the first part 211, and the connector 22 is located on the second part 212; the first part 211 includes a first surface 2111 facing the battery cell 1 and a second surface 2112 facing away from the battery cell 1, and at least one of the first surface 2111 and the second surface 2112 is provided with a welding part 2113, which is welded with the tab 11.

[0051] The battery module of the utility model, protection plate assembly 2 adopt flexible circuit board 21 as the substrate, protection plate assembly 2 have smaller thickness, the first part 211 of flexible circuit board 21 and the head end face of battery cell 1 correspond parallel arrangement, first part 211 have the welding part 2113 that can weld battery cell 1 tab 11, the second part 212 of flexible circuit board 21 can be connected with external circuit through connector 22, tab 11 and welding part 2113 are directly welded and connected, do not need to carry out multiple bending operation, further compress the thickness, the space of the head of battery cell 1 is smaller, thereby can increase the volume of battery cell 1, further advantageously improve the capacity of battery module.

[0052] Exemplarily, the flexible circuit board 21 (Flexible Printed Circuit board, FPC), also known as flexible printed circuit board, soft circuit board, flexible circuit board, etc., takes polyimide or polyester film as the base material, embeds circuit design on the bendable and thin base material, embeds a large number of precise elements in narrow and limited space, thereby forming a bendable flexible circuit board, which has the advantages of thin thickness, random bending, and light folding weight.

[0053] In the embodiment, the technical effect of the thin thickness of the flexible circuit board 21 is mainly used, the flexible circuit board 21 is used instead of the printed circuit board (PCB) in the related art, the flexible circuit board 21 has higher thinness advantage, which can effectively reduce the thickness of the protection plate assembly 2, and then reduce the occupation of the head space of the battery cell 1 by the protection plate assembly 2.

[0054] In some possible implementation manners, the welding part 2113 and the tab 11 are connected by laser welding equipment.

[0055] In some embodiments, the welding portion 2113 is a partial selective plating forming structure of the first surface 2111 or the second surface 2112, and the thickness of the welding portion 2113 is greater than or equal to a target value.

[0056] Through the above arrangement, the welding portion 2113 is formed by using the partial selective plating technology, so that the thickness of the welding portion 2113 can reach the target value, thereby meeting the welding requirement of the welding portion 2113 and the tab 11, and there is no need to worry about the breakdown of the welding portion 2113.

[0057] In the present embodiment, the selective plating is a kind of electroplating, which can form a metal plating layer of nickel, gold or the like in a local area of the circuit board, and can be used to improve the welding performance of the local area of the circuit board.

[0058] In some embodiments, the thickness of the welding portion 2113 is greater than or equal to 50 microns. Therefore, when the thickness of the welding portion 2113 is greater than or equal to 50 microns, the welding requirement of the welding portion 2113 and the tab 11 can be met, and the thickness of the protection plate assembly 2 will not increase, so as to ensure that the protection plate assembly 2 has a smaller space occupation.

[0059] In combination with FIGS. 1 and 2, Figure 1 and Figure 3 As shown in FIGS. 1 and 2, in some embodiments, when the first surface 2111 is provided with the welding portion 2113, the tab 11 includes a first flat plate portion 111.

[0060] The first flat plate portion 111 is located between the first surface 2111 and the head end surface of the battery cell 1, and the first flat plate portion 111 is respectively welded to the pole of the battery cell 1 and the welding portion 2113.

[0061] Through the above arrangement, the tab 11 of the battery cell 1 only includes the first flat plate portion 111, when the flexible circuit board 21 is parallelly attached to the head end surface of the battery cell 1, the position of the first flat plate portion 111 is just corresponding to the welding portion 2113, at this time, the bottom surface of the first flat plate portion 111 is connected to the battery cell 1 (for example, the pole of the battery cell 1), and the top surface of the first flat plate portion 111 is connected to the welding portion 2113. The present embodiment can not only reduce the thickness of the protection plate assembly 2, but also reduce the volume of the tab 11, and further reduce the space occupation of the head of the battery cell 1.

[0062] In combination with FIGS. 1 and 2, Figure 3 As shown in FIGS. 1 and 2, in some embodiments, the first portion 211 is provided with a wiring vacuum area 2114, and the position of the wiring vacuum area 2114 corresponds to the position of the welding portion 2113.

[0063] When the welding portion 2113 is located on the first surface 2111 of the flexible circuit board 21, considering that the welding portion 2113 and the tab 11 need to be welded from the outside, in order to avoid the welding operation from damaging the routing structure in the first part 211 of the flexible circuit board 21, a routing vacuum area 2114 is set in the first part 211 corresponding to the welding portion 2113. When designing the routing structure, avoid the routing vacuum area 2114 to ensure the safety of the circuit structure in the first part 211.

[0064] Combine Figure 2 and Figure 4 As shown, in some embodiments, when the second surface 2112 is provided with a welding portion 2113 , the tab 11 includes a first flat portion 111 , a U-shaped bent portion 112 and a second flat portion 113 .

[0065] The first flat portion 111 is located between the first surface 2111 and the head end surface of the battery cell 1 , and is welded to the pole of the battery cell 1 ; the second flat portion 113 is located on the second surface 2112 , and is welded to the welding portion 2113 .

[0066] The U-shaped bending portion 112 is located at one side edge of the flexible circuit board 21 , and the U-shaped bending portion 112 is connected to the first flat portion 111 and the second flat portion 113 , respectively.

[0067] Through the above arrangement, the welding portion 2113 is arranged on the second surface 2112 of the first portion 211 facing away from the battery cell 1. In this case, the tab 11 of the battery cell 1 can include a first flat portion 111, a U-shaped bent portion 112, and a second flat portion 113. The bottom surface of the first flat portion 111 is welded to the terminal of the battery cell 1. The U-shaped bent portion 112 bypasses a side edge of the first portion 211 and is connected between the first flat portion 111 and the second flat portion 113. The second flat portion 113 and the welding portion 2113 are both located on the outside of the flexible circuit board. The two can be directly welded together using welding equipment, which improves welding reliability.

[0068] Combine Figure 5 and Figure 6 As shown, in some embodiments, the protection plate assembly 2 also includes a reinforcing metal sheet 3, which is adhered to the second surface 2112; the position of the reinforcing metal sheet 3 corresponding to the welding portion 2113 is provided with an avoidance hollowing area 31, and the reinforcing metal sheet 3 is insulated from the welding portion 2113 and the tab 11 respectively.

[0069] In the embodiment, considering that the hardness of the flexible circuit board 21 is small, the reinforcing metal sheet 3 is attached on the second surface 2112 of the flexible circuit board 21, and the avoiding hollowing area 31 is arranged at the position corresponding to the welding part 2113, so that the welding operation of the welding part 2113 and the tab 11 can be performed by using the avoiding hollowing area 31, and the insulation arrangement of the reinforcing metal sheet 3 and the welding part 2113 and the tab 11 can be realized.

[0070] In some embodiments, the avoiding hollowing area 31 is filled with insulating glue. By filling the avoiding hollowing area 31 with insulating glue, the welding part 2113, the tab 11 and the like can be wrapped inside, so that the short circuit of the battery module caused by the contact between the external metal structure and the welding part 2113, the tab 11 and the like is prevented, and the safety of the battery module is improved.

[0071] In some embodiments, when the first surface 2111 is provided with the welding part 2113, the welding part 2113 is located in the orthographic projection of the avoiding hollowing area 31 on the first surface 2111, so that the welding operation of the welding part 2113 and the tab 11 can be performed by using the avoiding hollowing area 31, and the insulation arrangement of the reinforcing metal sheet 3 and the welding part 2113 and the tab 11 can be realized.

[0072] In combination with FIGS. 1, 2 and 3, Figure 5 and Figure 6 In some embodiments, when the second surface 2112 is provided with the welding part 2113, and the tab 11 comprises the second flat plate part 113, the welding part 2113 and the corresponding second flat plate part 113 are located in the avoiding hollowing area 31, so that the welding operation of the welding part 2113 and the tab 11 can be performed by using the avoiding hollowing area 31, and the insulation arrangement of the reinforcing metal sheet 3 and the welding part 2113 and the tab 11 can be realized.

[0073] In some embodiments, the protection plate assembly 2 further comprises a protection circuit, and the protection circuit comprises a plurality of protection devices which are respectively packaged on the first surface 2111 and / or the second surface 2112 of the flexible circuit board 21.

[0074] The battery module provided by the utility model adopts the flexible circuit board and the reinforcing metal sheet as the basic support of the protection plate assembly, which can effectively reduce the thickness and space occupation of the protection plate module, and can cancel the commonly used connecting nickel sheet in the related technology, the tab of the battery cell is directly welded with the welding part on the surface of the flexible circuit board, and the tab of the battery cell only needs to be bent once or does not need to be bent, which further compresses the space occupation of the protection plate assembly and the tab, so that the volume ratio of the battery cell can be increased, and the capacity of the battery module is improved.

[0075] On the other hand, the embodiment provides a terminal device, and the terminal device adopts the battery module of the utility model.

[0076] The terminal device provided by the embodiment adopts the battery module of the utility model, and has all the beneficial technical effects of the utility model.

[0077] The utility model provides a kind of terminal equipment. Specifically, the terminal equipment can be any one of various types of computer system equipment that is mobile or portable and performs wireless communication. Specifically, the terminal equipment can be a mobile phone or a smart phone (e.g., an iPhone TM-based phone, an Android TM-based phone), a portable game device (e.g., Nintendo DS TM, PlayStation Portable TM, Gameboy Advance TM, iPhone TM), a laptop computer, a PDA, a portable Internet device, a music player, and a data storage device, other handheld devices, and the like, such as a headset, and the terminal equipment can also be other wearable devices that need to be charged (e.g., a headset (HMD) such as an electronic bracelet, an electronic necklace, a terminal device, or a smart watch).

[0078] The terminal equipment can also be any one of a plurality of terminal equipment, including but not limited to a cellular phone, a smart phone, other wireless communication devices, a personal digital assistant, an audio player, other media players, a music recorder, a video recorder, other media recorders, a radio, a medical device, a vehicle transportation instrument, a calculator, a programmable remote controller, a pager, a laptop computer, a desktop computer, a printer, a netbook, a personal digital assistant (PDA), a portable multimedia player (PMP), a Motion Picture Experts Group (MPEG-1 or MPEGG-2) audio layer 3 (MP3) player, a portable medical device, and a digital camera and combinations thereof.

[0079] In some cases, the terminal equipment can perform multiple functions (e.g., playing music, displaying videos, storing pictures, and receiving and sending phone calls). If necessary, the terminal equipment can be a device such as a cellular phone, a media player, other handheld devices, a wristwatch device, a pendant device, a handset device, or other compact portable devices.

[0080] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "

[0081] Furthermore, the terms "first", "second", etc. are used only to describe various conditions, and are not to be construed as indicating or implying relative importance or a specific number of indicated technical features. Thus, a feature defined with "first", "second", etc. can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise expressly and specifically limited.

[0082] In the description of the present application, the description of the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the described embodiments or examples are included in at least one embodiment or example of the present application.

[0083] The above is only an embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery module, characterized in that: The battery module comprises: a battery cell (1) and a protection plate assembly (2); The head of the battery cell (1) is provided with a tab (11); The protection plate assembly (2) includes a flexible circuit board (21) and a connector (22); The flexible circuit board (21) comprises a first part (211) and a second part (212); The first part (211) has the same shape as the head end face of the battery core (1), and the first part (211) is parallel to the head end face of the battery core (1); the second part (212) is connected to one side of the first part (211), and the connector (22) is located on the second part (212); The first portion (211) comprises a first surface (2111) facing the battery cell (1) and a second surface (2112) facing away from the battery cell (1); a welding portion (2113) is provided on at least one of the first surface (2111) and the second surface (2112); and the welding portion (2113) is welded to the tab (11).

2. The battery module according to claim 1, wherein: The welding portion (2113) is a local selective plating molding structure of the first surface (2111) or the second surface (2112), and the thickness of the welding portion (2113) is greater than or equal to a target value.

3. The battery module according to claim 2, characterized in that: The thickness of the welding portion (2113) is greater than or equal to 50 microns.

4. The battery module according to claim 1, wherein: When the first surface (2111) is provided with the welding portion (2113), the tab (11) includes a first flat plate portion (111); The first flat plate portion (111) is located between the first surface (2111) and the head end face of the battery cell (1), and the first flat plate portion (111) is welded to the pole of the battery cell (1) and the welding portion (2113) respectively.

5. The battery module according to claim 4, characterized in that: A wiring vacuum area (2114) is provided in the first portion (211), and the position of the wiring vacuum area (2114) corresponds to the position of the welding portion (2113).

6. The battery module according to claim 1, characterized in that: When the second surface (2112) is provided with the welding portion (2113), the tab (11) comprises a first flat portion (111), a U-shaped bent portion (112), and a second flat portion (113); The first flat plate portion (111) is located between the first surface (2111) and the head end face of the battery core (1), and the first flat plate portion (111) is welded to the pole of the battery core (1); The second flat plate portion (113) is located on the second surface (2112), and the second flat plate portion (113) is welded to the welding portion (2113); The U-shaped bending portion (112) is located at one side edge of the flexible circuit board (21), and the U-shaped bending portion (112) is connected to the first flat plate portion (111) and the second flat plate portion (113) respectively.

7. The battery module according to any one of claims 1 to 6, characterized in that: The protective plate assembly (2) further comprises a reinforcing metal sheet (3), wherein the reinforcing metal sheet (3) is attached to the second surface (2112); The reinforcing metal sheet (3) is provided with an avoidance hollowing area (31) at a position corresponding to the welding portion (2113), and the reinforcing metal sheet (3) is insulated from the welding portion (2113) and the tab (11) respectively.

8. The battery module according to claim 7, characterized in that: The avoidance hollow area (31) is filled with insulating glue.

9. The battery module according to claim 7, characterized in that: When the first surface (2111) is provided with the welding portion (2113), the welding portion (2113) is located within the orthographic projection of the avoidance hollowing area (31) on the first surface (2111); and / or, When the second surface (2112) is provided with the welding portion (2113), and the tab (11) includes a second flat portion (113), the welding portion (2113) and the corresponding second flat portion (113) are located within the avoidance hollowing area (31).

10. A terminal device, characterized in that: The terminal device adopts the battery module according to any one of claims 1 to 9.

Images