Battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a battery device and electric equipment. The battery device comprises a battery module and a circuit board. The battery module is provided with a connecting terminal, and the circuit board is connected with the connecting terminal of the battery module. Wherein the circuit board and the connecting terminal of the battery module are positioned on different sides of the battery module. Therefore, no other connecting part is arranged at the connecting terminal of the battery module, and the connecting terminal of the battery module is exposed, so that the heat dissipation area of the battery module is increased, and the heat dissipation efficiency and the heat dissipation effect of the battery device are further improved. Potential safety hazards of the battery device are prevented, and the safety of the battery device is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] With the continuous development of new energy, the performance requirements for battery packs are becoming increasingly higher, such as: high energy density, good heat dissipation performance and structural safety.

[0003] In related technologies, a battery pack consists of a battery module and a circuit board. The circuit board is located in correspondence with and electrically connected to the positive and negative terminals of the battery module, and the circuit board covers the positive and negative terminals of the battery module. The battery management system (BMS) on the circuit board monitors the current, voltage, and temperature of the battery module.

[0004] During operation, the positive and negative terminals of the battery module converge and generate heat. This results in poor heat transfer in the battery pack, posing a potential safety hazard. Utility Model Content

[0005] The present application provides a battery device and electrical equipment that can enhance heat dissipation and improve safety.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] The present application provides a battery device, comprising:

[0008] A battery module having connection terminals;

[0009] A circuit board, wherein the circuit board is connected to the connection terminals of the battery module;

[0010] The connection terminals of the circuit board and the battery module are located on different sides of the battery module.

[0011] As an optional implementation manner, an extension direction of the connecting terminal intersects with a plane where the circuit board is located.

[0012] As an optional embodiment, there are multiple battery modules, and the multiple battery modules are arranged in sequence along the first direction. The connection terminals of the multiple battery modules are located on the same side of the corresponding battery modules; and the connection terminals of each battery module are electrically conductive.

[0013] As an optional embodiment, the battery device further includes a first conductive member, and the connection terminals of adjacent battery modules are electrically connected via the first conductive member.

[0014] As an optional embodiment, a plurality of the battery modules form a battery pack;

[0015] The battery device further includes a first restraint member that wraps around the battery pack.

[0016] As an optional embodiment, there are multiple battery packs, and the multiple battery packs are arranged in sequence along the first direction;

[0017] The first restraint wraps around at least two adjacent battery packs.

[0018] As an optional embodiment, the battery device further includes a first shell, the first shell has a first accommodating cavity, and the battery module is located in the first accommodating cavity.

[0019] As an optional embodiment, a first connecting terminal and a second connecting terminal are provided on the first shell, the first connecting terminal is electrically connected to the circuit board, and the second connecting terminal is electrically connected to the connecting terminal of the battery module.

[0020] As an optional implementation, the first connecting terminal, the second connecting terminal and the first housing are integrally formed by injection molding.

[0021] As an optional embodiment, the battery device further includes a first buffer member, which is located in the first accommodating cavity and is disposed between the battery module and an inner wall of the first shell.

[0022] As an optional embodiment, the battery module includes a second shell, a battery cell and a fastening assembly; the second shell has a second accommodating cavity, and the battery cell and the fastening assembly are located in the second accommodating cavity;

[0023] The fastening assembly at least partially wraps the battery cell.

[0024] As an optional embodiment, the battery cell includes a plurality of battery cells stacked along the second direction;

[0025] Along the third direction, the connecting terminal is located on the end surface of the battery cell;

[0026] The first direction, the second direction and the third direction are perpendicular to each other.

[0027] As an optional embodiment, the fastening assembly includes a second restraint member, the second restraint member is located in the second accommodating cavity, and the second restraint member is wrapped around the battery cell.

[0028] As an optional embodiment, the fastening assembly further includes a connecting plate, and the connecting plate is located in the second accommodating cavity.

[0029] Along the second direction, the connecting plate and a side of the second restraining member facing away from the battery core are at least partially in contact with each other.

[0030] As an optional implementation, the battery cell and the fastening assembly are both adhered to the inner wall of the second shell.

[0031] As an optional embodiment, the positive electrode and the negative electrode of the battery cell are located on the same side of the battery cell;

[0032] The battery cell further includes a second conductive member, and adjacent battery cells are connected via the second conductive member.

[0033] As an optional embodiment, the plurality of battery cells form a plurality of battery cell groups, and the plurality of battery cell groups are sequentially distributed along the second direction;

[0034] In the battery cell group, adjacent battery cells are connected in parallel via the second conductive member;

[0035] Adjacent battery cell groups are connected in series via the second conductive member.

[0036] As an optional embodiment, the battery cell further includes a second buffer member and a support member, wherein the support member is disposed between the second conductive member and the battery cell;

[0037] The second buffer member is connected between the support member and the battery core.

[0038] As an optional implementation, a battery management module is provided on the circuit board, and the battery management module is electrically connected to the battery module.

[0039] The battery device provided by the present application has the connection terminals of the circuit board and the battery module electrically connected, thereby achieving circuit connectivity. The connection terminals of the circuit board and the battery module are located on different sides of the battery module, and the connection terminals of the battery module are exposed, which increases the contact range between the connection terminals of the battery module and the external air, improves the heat conduction effect between the connection terminals of the battery module and the external air, thereby improving the heat dissipation effect of the battery device, reducing the safety hazards of the battery device, and improving the safety of the battery device. At the same time, when the connection terminals of the battery module converge during operation, such a battery device forms electrical isolation between the circuit board and the battery module to ensure the stability of the circuit inside the battery device and improve the safety of the battery device.

[0040] In a second aspect, the present application provides an electrical device, comprising an electrical device and the battery device described in the first aspect, wherein the electrical device and the battery device are electrically connected.

[0041] The electrical equipment provided in the present application includes the battery device in any of the aforementioned embodiments, which can improve the heat dissipation effect and safety of the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0043] Figure 1 An exploded view of a battery device provided in an embodiment of the present application;

[0044] Figure 2 for Figure 1 A partial enlarged view of the dotted line portion;

[0045] Figure 3 A front view of a battery module in a battery device provided in an embodiment of the present application;

[0046] Figure 4 A top view of a battery device provided in an embodiment of the present application;

[0047] Figure 5 A top view of a battery module and a circuit board in a battery device provided in an embodiment of the present application;

[0048] Figure 6 An exploded view of a battery module in a battery device provided in an embodiment of the present application;

[0049] Figure 7 for Figure 6 A partial enlarged view of middle Ⅰ;

[0050] Figure 8 for Figure 6 A partial enlarged view of middle II.

[0051] Description of reference numerals:

[0052] 100-battery device;

[0053] 110, 110a, 110b, 110c, 110d - battery module;

[0054] 111-connection terminal;

[0055] 112-second housing; 1121-second accommodating cavity;

[0056] 113 - battery cell; 1131 - battery cell; 1132 - second conductive member; 1133 - second buffer member; 1134 - support member; 1135 - cable tray;

[0057] 114-connecting plate;

[0058] 120-circuit board;

[0059] 130-first conductive member;

[0060] 140-first restraint;

[0061] 150 - first housing; 151 - body; 152 - housing cover; 153 - handle; 154 - first connecting terminal; 155 - second connecting terminal;

[0062] 160-first buffer;

[0063] 170-Sampling harness. DETAILED DESCRIPTION

[0064] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0065] With the continuous development of new energy, the performance requirements for battery packs are becoming increasingly higher, such as: high energy density, good heat dissipation performance and structural safety.

[0066] In related technologies, a battery pack consists of a battery module and a circuit board. The circuit board is located in correspondence with and electrically connected to the positive and negative terminals of the battery module, and the circuit board covers the positive and negative terminals of the battery module. The battery management system (BMS) on the circuit board monitors the current, voltage, and temperature of the battery module.

[0067] During operation, the positive and negative terminals of the battery module converge and generate heat. This results in poor heat transfer in the battery pack, posing a potential safety hazard.

[0068] To overcome the shortcomings of the prior art, the present application provides a battery device and electrical equipment. The battery device includes a battery module and a circuit board. The battery module has connecting terminals, and the circuit board and the battery module connecting terminals are connected. The connecting terminals of the circuit board and the battery module are located on different sides of the battery module. In this way, there are no other connecting components at the connecting terminals of the battery module, and the connecting terminals of the battery module are exposed, which increases the heat dissipation area of ​​the battery module and further improves the heat dissipation efficiency and effect of the battery device. This prevents the battery device from posing safety hazards and improves the safety of the battery device.

[0069] The contents of this application will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the contents of this application more clearly and in detail.

[0070] Figure 1 This is an exploded view of the battery device provided in an embodiment of the present application. Figure 2 for Figure 1 A partial enlarged view of the dotted line part. Figure 3 A front view of a battery module in a battery device according to an embodiment of the present application. Figure 4 A top view of a battery device according to an embodiment of the present application. Figure 5 A top view of the battery module and circuit board in the battery device provided in an embodiment of the present application.

[0071] First, as Figure 1-Figure 5 As shown, the present application provides a battery device 100 , including: a battery module 110 and a circuit board 120 .

[0072] The battery module 110 has a connection terminal 111 ; the circuit board 120 is connected to the connection terminal 111 of the battery module 110 ; the circuit board 120 and the connection terminal 111 of the battery module 110 are located on different sides of the battery module 110 .

[0073] According to the battery device 100 provided in the present application, the circuit board 120 and the connection terminals 111 of the battery module 110 are electrically connected, achieving circuit connectivity. The circuit board 120 and the connection terminals 111 of the battery module 110 are located on different sides of the battery module 110. The connection terminals 111 of the battery module 110 are exposed, which increases the contact area between the connection terminals 111 of the battery module 110 and the external air, improves the heat conduction effect between the connection terminals 111 of the battery module 110 and the external air, thereby improving the heat dissipation effect of the battery device 100, reducing the safety hazards of the battery device 100, and improving the safety of the battery device 100. At the same time, when the connection terminals 111 of the battery module 110 converge during operation, such a battery device 100 forms electrical isolation between the circuit board 120 and the battery module 110 to ensure the stability of the circuit within the battery device 100 and improve the safety of the battery device 100.

[0074] The specific structure of the battery device 100 and various optional implementations are described in detail below.

[0075] It is understandable that the battery device 100 provided in this application can be applied in the fields of consumer electronics, electric vehicles, energy storage systems, etc., and this application does not make specific requirements in this regard.

[0076] The battery module 110 has a connection terminal 111. There may be two connection terminals 111, one serving as the positive electrode and the other as the negative electrode of the battery module 110. The connection terminal 111 may be located on any surface of the battery module 110, and this section does not make specific requirements for this. It should be noted that the connection terminal 111 may be a metal column or sheet with a conductive function, such as a pole, copper busbar, aluminum busbar, etc. The connection terminal may also be a nickel sheet welded to the positive and / or negative electrode of the battery module 110.

[0077] The circuit board 120 is connected to the connection terminal 111 of the battery module 110. Specifically, the circuit board 120 and the connection terminal 111 of the battery module 110 can be connected by a wire or a metal conductive member, and there is no specific requirement for this.

[0078] The circuit board 120 and the connection terminal 111 of the battery module 110 are located on different sides of the battery module 110. Figure 1 、 Figure 4 、 Figure 5 The connection terminal 111 of the battery module 110 is located on the end face of the battery module 110 along the X direction. The circuit board 120 can be located on the end face of the battery module 110 along the X direction that is opposite to the end face where the connection terminal 111 of the battery module 110 is located, or on the end face of the battery module 110 along the Z direction, or on the end face of the battery module 110 along the Y direction.

[0079] In an optional embodiment, the extension direction of the connecting terminal 111 intersects with the plane where the circuit board 120 is located. It is not difficult to understand that the connecting terminal 111 serves as the positive and negative poles of the battery module 110 to be connected to the circuit board 120. The connecting terminal 111 can extend in any direction relative to the end face of the battery module 110 and be directly electrically connected to the circuit board 120. In this way, the plane where the circuit board 120 is located intersects with the extension direction of the connecting terminal 111, that is, the connecting terminals 111 of the circuit board 120 and the battery module 110 can be located on adjacent sides of the battery module 110, which can reduce the connection wiring between the connecting terminal 111 and the circuit board 120 and save space.

[0080] Optionally, the first direction is defined as the Y direction, and multiple battery modules 110 are arranged sequentially along the first direction (Y direction). The connection terminals 111 of the multiple battery modules 110 are located on the same side of the corresponding battery modules 110. The connection terminals 111 of each battery module 110 are electrically connected. The arrangement of multiple battery modules 110 can increase the capacity of the battery device 100 and extend the service life of the electrical device.

[0081] Optionally, the battery device 100 further includes a first conductive member 130 , and the connection terminals 111 of adjacent battery modules 110 are electrically connected via the first conductive member 130 .

[0082] The following combination Figure 1 、 Figure 3-Figure 5 , the multiple battery modules 110 and the electrical connections between the battery modules 110 are described.

[0083] Exemplarily, there are four battery modules 110, and the four battery modules 110 are arranged along the Y direction. In order to facilitate the connection between adjacent battery modules 110, the connection terminals 111 of the four battery modules 110 can be located on the same side of the battery module 110 along the X direction, and the connection terminals 111 of two adjacent battery modules 110 are electrically connected through the first conductive member 130.

[0084] It should be noted that in the embodiment of the present application, four battery modules 110 are connected in series via the first conductive member 130. In practice, two adjacent battery modules 110 can be connected in series or in parallel via the first conductive member 130, and this section does not make specific requirements for this. Furthermore, the first conductive member 130 can be at least one of a wire and a metal conductive sheet. Furthermore, the number of battery modules 110 in the embodiment of the present application is not limited to the four illustrated above.

[0085] When the first conductive member 130 is a metal conductive sheet, the first conductive member 130 may be made of an aluminum busbar, a copper busbar, or the like.

[0086] For example, see Figure 3 The battery modules 110a and 110b are connected in series via aluminum bars, the battery modules 110c and 110b are connected in series via aluminum bars, and the battery modules 110b and 110c are connected in series via wires.

[0087] Optionally, multiple battery modules 110 form a battery pack, and the battery device 100 further includes a first restraining member 140 , which wraps around the battery pack. Thus, the first restraining member 140 improves the stability of the battery device 100 .

[0088] See Figure 4 、 Figure 5The four battery modules 110 in the embodiment of the present application can form a battery pack. Such a battery pack can be bundled by wrapping a first restraint member 140 or multiple first restraint members 140 to achieve a stable restraint connection of the battery pack, thereby improving the structural stability of the battery device 100 and further improving the safety of the battery.

[0089] When a battery pack is wrapped with multiple first restraints 140, the multiple first restraints 140 can be arranged in sequence along the X direction to improve the reliability of the relative fastening connection between the multiple battery modules 110 in the battery pack, increase the fastening force, and further improve the stability of the battery device 100.

[0090] Optionally, during the manufacturing process of the battery device 100, multiple battery modules 110 can be formed into multiple battery packs. When there are multiple battery packs, the battery packs are arranged sequentially along the first direction (Y direction); the first restraining member 140 is wrapped around at least two adjacent battery packs, thereby further improving the stability of the restraint connection of the battery device 100.

[0091] It is not difficult to understand that in the embodiment of the present application, four battery modules 110 are used as an example to illustrate that the four battery modules 110 can form two battery groups, each of which has two battery modules 110. For example, battery module 110a and battery module 110b form a battery group and are bundled by the first restraint 140; battery module 110c and battery module 110d form a battery group and are bundled by the first restraint 140. The two battery groups are arranged along the Y direction, and the two battery groups are then bundled and fixed by the first restraint 140. In this way, the connection stability of the battery device 100 is improved by multiple bundling of multiple first restraints 140. At the same time, the bundling method of the first restraint 140 facilitates the connection of multiple battery modules 110, thereby improving the production efficiency of the battery device 100.

[0092] It should be noted that the first restraint 140 in the embodiment of the present application can be a polyethylene tie (Polyethylene, PE), a thermoplastic polyester tie (Polyethylene terephthalate, PET), or a metal belt, etc. The embodiment of the present application does not make specific requirements for this.

[0093] In some embodiments, the battery device 100 further includes a first housing 150 having a first accommodating cavity within which the battery module 110 is located. Thus, the first housing 150 encases and protects the battery module 110, further improving the safety of the battery device 100.

[0094] like Figure 1As shown, the first housing 150 includes a main body 151 and a cover 152. The main body 151 is open on one side. The cover 152 is connected to the opening of the main body 151 and, together with the main body 151, forms a first accommodating cavity. The battery module 110 is located in the first accommodating cavity. The battery module 110 and the inner wall of the first housing 150 are relatively stably connected, improving the stability and safety of the battery device 100.

[0095] In the embodiment of the present application, the connection between the main body 151 and the shell cover 152 is sealed with structural adhesive, and the protection level can reach IP66, which can not only ensure the connection strength of the first shell 150, but also improve the sealing of the first shell 150, thereby protecting the battery module 110 in the first accommodating cavity through the first shell 150.

[0096] In addition, the inner wall of the first shell 150 may be coated with an adhesive, and the battery module 110 is adhered to the inner wall of the first shell 150 by the adhesive, so that the battery module 110 and the inner wall of the first shell 150 are stably connected.

[0097] A handle 153 is further provided on the outer side of the first housing 150 . The handle 153 facilitates the transportation of the battery device 100 .

[0098] In some optional embodiments, the first housing 150 is provided with a first connection terminal 154 and a second connection terminal 155. The first connection terminal 154 is electrically connected to the circuit board 120, and the second connection terminal 155 is electrically connected to the connection terminal 111 of the battery module 110. In this way, the battery device 100 can be connected to an external power device through the first connection terminal 154 and the second connection terminal 155, and the battery device 100 can provide power to the external power device.

[0099] Specifically, the negative terminal 111 of the battery module 110 is connected to the circuit board 120, the first connection terminal 154 on the first housing 150 is connected to the circuit board 120, and the negative terminal 111 of the battery module 110 is connected to the second connection terminal 155 on the first housing 150. It can be understood that the first housing 150, the circuit board 120, and the battery module 110 form a series connection. When the battery device 100 is connected to an external power device, it can supply power to the external power device.

[0100] It should be noted that the first connecting terminal 154, the circuit board 120, the battery module 110 and the second connecting terminal 155 can be connected by a wire, and the wire can be fixed by a buckle or a cable tie to make the layout of the wire beautiful and the layout of the wire clearer, which facilitates the optimized design of the wire layout path.

[0101] Optionally, the first connection terminal 154 and the second connection terminal 155 are integrally formed with the first housing 150 by injection molding. In this way, the production efficiency of the first housing 150 is improved by the integral injection molding method. At the same time, the injection molding connection can ensure the sealing of the first housing 150.

[0102] It should be noted that the first shell 150 is an injection molded part, and the first connecting terminal 154 and the second connecting terminal 155 are both conductive parts. During the injection molding process, the first connecting terminal 154 and the second connecting terminal 155 are first embedded and then injection molded to achieve the integrated molding of the first shell 150, the first connecting terminal 154 and the second connecting terminal 155.

[0103] Optional, combined Figure 1 and Figure 4 The battery device 100 further includes a first buffer member 160, which is located within the first accommodating cavity and disposed between the battery module 110 and the inner wall of the first housing 150. The first buffer member 160 limits the movement of the battery module 110 within the first accommodating cavity and, at the same time, cushions the battery device 100 from vibrations and collisions during use, thereby improving the stability and safety of the battery device 100.

[0104] It should be noted that the first buffer member 160 can be made of foam, but is not limited to foam, and this application does not make specific requirements for this.

[0105] Figure 6 This is an exploded view of a battery module in a battery device provided in an embodiment of the present application. Figure 7 for Figure 6 A partial enlarged view of part Ⅰ. Figure 8 for Figure 6 A partial enlarged view of middle II.

[0106] Optionally, the battery module 110 includes a second housing 112, a battery cell 113, and a fastening assembly. The second housing 112 has a second accommodating cavity 1121, within which the battery cell 113 and the fastening assembly are located. The fastening assembly at least partially encapsulates the battery cell 113. In this embodiment of the present application, the second housing 112 and the fastening assembly encapsulate the battery cell 113, thereby reducing the degradation of the cycle performance of the battery device 100 caused by expansion and deformation of the battery cell 113 during use, thereby extending the service life of the battery device 100.

[0107] See Figure 6-Figure 8 One side of the second shell 112 is open, and the opening is connected to the second accommodating cavity 1121. After the fastening assembly wraps the battery cell 113, it is located in the second accommodating cavity 1121 through the opening.

[0108] For example, see Figures 1-8 , defining the Z direction as the second direction and the X direction as the third direction. The battery cell 113 includes multiple battery cells 1131 stacked along the second direction (Z direction). Along the third direction (X direction), the connection terminal 111 is located on the end face of the battery cell 113. The first direction (Y direction), the second direction (Z direction), and the third direction (X direction) are mutually perpendicular. In this way, the arrangement of multiple battery cells 1131 in a single battery cell 113 increases its capacity.

[0109] The battery in the embodiment of the present application can be a soft-pack battery or a square shell battery, etc., and the embodiment of the present application does not make specific limitations on this.

[0110] The fastening assembly includes a second restraint (not shown in the figure), which is located in the second accommodating cavity 1121 and is wrapped around the battery cell 113. In this way, by wrapping the battery cell 113 with the second restraint, the multiple battery cells 1131 are fixed, so that the structure of the battery cell 113 is stable, and at the same time, the expansion deformation of the battery cell 1131 can be offset, effectively solving the problem of the degradation of the cycle performance of multiple battery cells 1131 in the expanded state. Furthermore, the connection between the second restraint and the battery cell 113 is convenient, which is conducive to improving the production efficiency of the battery module 110 and the battery device 100.

[0111] Optionally, the fastening assembly further includes a connecting plate 114, which is positioned within the second accommodating cavity 1121. Along the second direction (Z direction), the connecting plate 114 and the side of the second restraining member facing away from the battery cell 1131 at least partially abut each other. The abutment of the connecting plate 114 and the second restraining member, in conjunction with the inner wall of the second housing 112, can reduce expansion deformation of the battery cell 113, thereby improving the stability and safety of the battery module 110. Furthermore, the overall structure of the battery device 100 is more stable and safer, and the service life of the battery device 100 is also extended.

[0112] It should be noted that the second restraint may be a fiberglass tape or a heat shrink film, or a polyethylene cable tie, or a thermoplastic polyester cable tie, and the embodiment of the present application does not make specific requirements for this.

[0113] Optionally, the battery cells 113 and the fastening components are both bonded to the inner wall of the second housing 112. In this way, the structure of the battery module 110 is more stable, and this connection method helps to improve the stability, reliability and safety of the battery device 100.

[0114] It should be noted that during the production process, structural adhesive can be applied to the inner wall of the second shell 112 to adhere the battery cells 113 and the fastening assembly to the inner wall of the second shell 112. Of course, the battery cells 113 wrapped with the fastening assembly can also be placed inside the second shell 112, and potting adhesive can be injected into the second accommodating cavity 1121 of the second shell 112 to adhere the battery cells 113 and the fastening assembly to the inner wall of the second shell 112. This not only ensures a stable connection between the various components of the battery module 110, but also absorbs the displacement and stress caused by the expansion of the battery cells 1131 through this structure.

[0115] As will be appreciated, the positive and negative electrodes of the battery cells 1131 are located on the same side of the battery cell 113. The battery cell 113 also includes a second conductive member 1132, through which adjacent battery cells 1131 are connected. The positive and negative electrodes of the battery cells 1131 being located on the same side facilitate interconnection between adjacent battery cells 1131, thereby achieving circuit continuity.

[0116] The positive tabs, negative tabs and second conductive member 1132 of the battery cell 1131 are resistance welded to achieve electrical connection between adjacent battery cells 1131 , and the battery cell 1131 and the second conductive member 1132 are firmly welded.

[0117] Optionally, multiple battery cells 1131 form multiple battery cell groups, and the multiple battery cell groups are distributed in sequence along the second direction (Z direction); within the battery cell group, adjacent battery cells 1131 are connected in parallel through the second conductive member 1132; and adjacent battery cell groups are connected in series through the second conductive member 1132.

[0118] For example, the battery cell 113 in the embodiment of the present application may include 16 battery cells 1131 stacked along the Z direction, with every four battery cells 1131 forming a battery cell group, and four battery cell groups may be formed, and the four battery cell groups are distributed in sequence along the Z direction.

[0119] The four cells 1131 within the same cell group are connected in parallel via the second conductive member 1132, achieving electrical connection between the cells 1131 within the same cell group. Adjacent cell groups are connected in series via the second conductive member 1132, achieving electrical connection between multiple cell groups. Ultimately, for a battery module 110, two connection terminals 111 are formed: one for the negative electrode and the other for the positive electrode.

[0120] It should be noted that the number of battery cells 1131 mentioned in the embodiment of the present application is not limited to 16 in the above example.

[0121] Optionally, the battery cell 113 further includes a second buffer member 1133 and a support member 1134 . The support member 1134 is disposed between the second conductive member 1132 and the battery cell 1131 . The second buffer member 1133 is connected between the support member 1134 and the battery cell 1131 .

[0122] As can be understood, support member 1134 is disposed between second conductive member 1132 and battery cell 1131 to prevent internal short circuits in battery cell 113 and to support and prevent deformation of the tabs of battery cell 1131. Second buffer member 1133 is connected between support member 1134 and battery cell 1131 to provide support and cushioning for support member 1134.

[0123] It should be noted that in an optional embodiment of the present application, a battery management module is provided on the circuit board 120, and the battery management module is electrically connected to the battery module 110. In this way, the battery management module can monitor information such as the voltage, current, and temperature of the battery module 110, thereby ensuring the safety of the battery device 100.

[0124] For example, the circuit board 120 includes a sampling harness 170, which is electrically connected to the circuit board 120 and each battery cell 1131 of the battery module 110, thereby acquiring sampling data from the corresponding battery cell 1131. The sampling harness 170 can be secured via a wire groove 1135 on the support member 1134, facilitating the securement and routing of the sampling harness 170, thereby improving the safety and stability of the battery device 100.

[0125] The battery device 100 provided herein includes a battery module 110 and a circuit board 120. The battery module 110 has a connection terminal 111; the circuit board 120 and the connection terminal 111 of the battery module 110 are connected; and the connection terminals 111 of the circuit board 120 and the battery module 110 are located on different sides of the battery module 110. This structural arrangement improves the heat dissipation effect and efficiency of the battery device 100, further enhancing the safety of the battery device 100.

[0126] In addition, an embodiment of the present application may further provide an electrical device, including an electrical device and the battery device 100 in any of the aforementioned embodiments, wherein the electrical device and the battery device 100 are electrically connected.

[0127] The electrical equipment provided in the embodiment of the present application includes the battery device 100 in any of the aforementioned embodiments, which can improve the heat dissipation effect and safety of the electrical equipment.

[0128] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0129] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0130] It should be readily understood that “on,” “above,” and “over” in this application should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes the meaning of “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0131] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90° or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery device (100), characterized in that: include: A battery module (110), wherein the battery module (110) has a connection terminal (111); A circuit board (120), the circuit board (120) being connected to the connection terminal (111) of the battery module (110); The circuit board (120) and the connection terminal (111) of the battery module (110) are located on different sides of the battery module (110).

2. The battery device (100) according to claim 1, characterized in that The extending direction of the connecting terminal (111) intersects with the plane where the circuit board (120) is located.

3. The battery device (100) according to claim 1, characterized in that There are a plurality of battery modules (110), and the plurality of battery modules (110) are arranged in sequence along a first direction. The connection terminals (111) of the plurality of battery modules (110) are located on the same side of the corresponding battery modules (110); and the connection terminals (111) of each battery module (110) are electrically connected.

4. The battery device (100) according to claim 3, characterized in that The battery device (100) further comprises a first conductive member (130), and the connecting terminals (111) of adjacent battery modules (110) are electrically connected via the first conductive member (130).

5. The battery device (100) according to claim 3, characterized in that A plurality of the battery modules (110) form a battery pack; The battery device (100) further includes a first restraining member (140) which wraps around the battery pack.

6. The battery device (100) according to claim 5, characterized in that There are multiple battery packs, and the multiple battery packs are arranged in sequence along the first direction; The first restraining member (140) wraps around at least two adjacent battery packs.

7. The battery device (100) according to any one of claims 1 to 6, characterized in that: It also includes a first shell (150), wherein the first shell (150) has a first accommodating cavity, and the battery module (110) is located in the first accommodating cavity.

8. The battery device (100) according to claim 7, characterized in that A first connecting terminal (154) and a second connecting terminal (155) are provided on the first shell (150); the first connecting terminal (154) is electrically connected to the circuit board (120); and the second connecting terminal (155) is electrically connected to the connecting terminal (111) of the battery module (110).

9. The battery device (100) according to claim 8, characterized in that The first connecting terminal (154), the second connecting terminal (155) and the first housing (150) are integrally formed by injection molding.

10. The battery device (100) according to claim 7, characterized in that The battery module further comprises a first buffer member (160), wherein the first buffer member (160) is located in the first accommodating cavity, and the first buffer member (160) is arranged between the battery module (110) and the inner wall of the first shell (150).

11. The battery device (100) according to any one of claims 1 to 6, characterized in that: The battery module (110) comprises a second shell (112), a battery cell (113), and a fastening assembly; the second shell (112) has a second accommodating cavity (1121), and the battery cell (113) and the fastening assembly are located in the second accommodating cavity (1121); The fastening assembly at least partially wraps the battery cell (113).

12. The battery device (100) according to claim 11, characterized in that The battery cell (113) includes a plurality of battery cells (1131) stacked along a second direction; Along the third direction, the connection terminal (111) is located on the end surface of the battery cell (113); The first direction, the second direction and the third direction are perpendicular to each other.

13. The battery device (100) according to claim 12, characterized in that The fastening assembly includes a second restraining member, the second restraining member is located in the second accommodating cavity (1121), and the second restraining member is wrapped around the battery cell (113).

14. The battery device (100) according to claim 13, characterized in that The fastening assembly further comprises a connecting plate (114), wherein the connecting plate (114) is located in the second accommodating cavity (1121). Along the second direction, the connecting plate (114) and the side of the second restraining member facing away from the battery core (1131) are at least partially in contact with each other.

15. The battery device (100) according to claim 11, characterized in that The battery cell (113) and the fastening assembly are both bonded to the inner wall of the second shell (112).

16. The battery device (100) according to claim 12, characterized in that The positive electrode and the negative electrode of the battery cell (1131) are located on the same side of the battery cell (113); The battery cell (113) further includes a second conductive member (1132), and adjacent battery cells (1131) are connected via the second conductive member (1132).

17. The battery device (100) according to claim 16, characterized in that The plurality of battery cells (1131) form a plurality of battery cell groups, and the plurality of battery cell groups are sequentially distributed along the second direction; In the battery cell group, adjacent battery cells (1131) are connected in parallel via the second conductive member (1132); Adjacent battery cell groups are connected in series via the second conductive member (1132).

18. The battery device (100) according to claim 16, characterized in that The battery cell (113) further includes a second buffer member (1133) and a support member (1134), wherein the support member (1134) is arranged between the second conductive member (1132) and the battery core (1131); The second buffer member (1133) is connected between the support member (1134) and the battery core (1131).

19. The battery device (100) according to any one of claims 1 to 6, characterized in that: A battery management module is provided on the circuit board (120), and the battery management module and the battery module (110) are electrically connected.

20. An electrical device, characterized in that: The invention comprises an electric device and a battery device (100) according to any one of claims 1 to 19, wherein the electric device and the battery device (100) are electrically connected.

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