Battery assembly, battery pack and electric equipment

Abstract

The embodiment of the invention discloses a battery assembly, a battery pack and electric equipment, and belongs to the technical field of batteries, the battery assembly comprises at least two battery monomers and at least one conductive connecting piece, and the connecting piece is arranged between two adjacent battery monomers; the connecting piece comprises a first surface, a middle connecting part and a second surface which are connected in sequence; the first surface is connected with one of the two adjacent battery monomers, and the second surface is connected with the other one of the two adjacent battery monomers; wherein the connecting piece is a cooling piece. On the premise that the conductive performance of the connecting piece is met, the cross sectional area of the connecting piece is increased, then the overcurrent area of the connecting piece is increased, and the overcurrent capacity of the connecting piece is improved to the maximum extent; meanwhile, the heat generated by the current can be directly cooled through the connecting piece, so that the heat can be continuously taken away, and the safety performance of the battery is improved.

Description

Technical Field

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

[0002] With the popularization of the new energy industry, power batteries (including lithium-ion batteries and sodium-ion batteries) as an energy device have been widely used in vehicles and other fields.

[0003] A battery assembly is made up of multiple connected battery cells, each housing a battery cell. In related art, multiple battery cells are typically connected via a connector. Specifically, the connector has a connection end that directly contacts the battery cell's tab. The connector is connected to the tab via the connection end. However, this connection method results in poor current handling and poor heat dissipation. Summary of the Invention

[0004] In view of the above problems, the present application provides a battery assembly, a battery pack and an electrical device, which helps to increase the cross-sectional area of the connector while meeting the conductive performance of the connector, thereby increasing the overcurrent area of the connector and maximizing the overcurrent capacity of the connector; at the same time, the heat generated by the current in the present application can be directly cooled through the connector, which helps to continuously take away the heat and improve the safety performance of the battery.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A first aspect of an embodiment of the present application provides a battery assembly, comprising at least two battery cells and at least one conductive connector, wherein the connector is arranged between two adjacent battery cells; the connector comprises a first surface, an intermediate connecting portion, and a second surface connected in sequence; the first surface is connected to one of the two adjacent battery cells, and the second surface is connected to the other of the two adjacent battery cells; wherein the connector is a cooling member.

[0007] In one feasible embodiment, a cooling channel is formed in the connecting member.

[0008] In a feasible embodiment, the cooling channel has an inlet and an outlet, and the inlet and the outlet are located on a surface of the connecting member and are arranged in a non-planar manner with the first surface and the second surface.

[0009] In one possible implementation, the cooling channel has an inlet and an outlet, and the inlet and the outlet are located on the same surface of the connecting member.

[0010] In a feasible embodiment, the connecting member further includes a third surface and a fourth surface, the inlet and the outlet are located on the third surface, and the terminal end of the cooling channel is located on a side of the intermediate connecting portion close to the fourth surface.

[0011] In a feasible embodiment, the first surface and the second surface are arranged opposite to each other, and the third surface and the fourth surface are arranged opposite to each other.

[0012] In a feasible embodiment, an isolation plate is provided in the cooling channel, and the cooling channel is separated into a liquid inlet channel and a liquid outlet channel by the isolation plate, and at least part of the liquid inlet channel and at least part of the liquid outlet channel are connected.

[0013] In one feasible embodiment, the battery cell includes a battery cell having a positive electrode and a negative electrode, the first surface is connected to the positive electrode of one of the two adjacent battery cells, and the second surface is connected to the negative electrode of the other of the two adjacent battery cells.

[0014] In a feasible implementation, two adjacent battery cells are welded via the connecting piece.

[0015] In one feasible embodiment, the welding depth between the first surface and one of the two adjacent battery cells is between 1 mm and 5 mm; and / or the welding depth between the second surface and the other of the two adjacent battery cells is between 1 mm and 5 mm.

[0016] A second aspect of an embodiment of the present application provides a battery pack including a battery assembly.

[0017] In one feasible embodiment, the number of the battery assemblies includes multiple, and two adjacent battery assemblies in the multiple battery assemblies are connected by a connector.

[0018] A third aspect of an embodiment of the present application provides an electrical device, including an electrical device and a battery pack.

[0019] The embodiments of the present application provide a battery assembly, a battery pack, and an electrical device, comprising at least two battery cells and at least one conductive connector, the connector being disposed between two adjacent battery cells and comprising a first surface, an intermediate connecting portion, and a second surface, which are sequentially connected. Thus, the connector, through the first surface and the second surface, can connect the two adjacent battery cells, thereby ensuring normal current transmission and the connector's electrical conductivity. Furthermore, the intermediate connecting portion helps increase the connector's cross-sectional area, thereby increasing the connector's current flow area and maximizing the connector's current flow capacity. Furthermore, the connector is a cooling element, so that the heat generated by the current in the present application can be directly cooled by the connector, thereby helping to continuously remove the heat, improve the battery's safety, ensure the battery's normal operation, and extend the battery's service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the battery assembly provided in the embodiment of the present application Figure 1 ;

[0021] Figure 2 for Figure 1 A partial enlarged schematic diagram of part I;

[0022] Figure 3 Schematic diagram of the structure of the battery assembly provided in the embodiment of the present application Figure 2 ;

[0023] Figure 4 A schematic diagram of the structure of the connector of the battery assembly provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the internal structure of a connector for a battery assembly provided in an embodiment of the present application;

[0025] Figure 6 A top view of the connector of the battery assembly provided in an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 100-battery assembly;

[0028] 110 - battery cell; 120 - connector; 121 - first surface;

[0029] 122-middle connecting portion; 123-second surface; 124-third surface;

[0030] 125 - fourth side; 126 - cooling channel; 1261 - liquid inlet channel;

[0031] 1262-Liquid outlet channel; 1263-Isolation plate; 127-Inlet;

[0032] 128-Exit. DETAILED DESCRIPTION

[0033] Currently, battery cells are generally connected by welding connecting plates. For example, the positive electrode of battery cell A and the negative electrode of battery cell B are connected by connecting plates, and the positive electrode of battery cell B and the negative electrode of battery cell C are connected by connecting plates. A group of battery cells connected in series form a battery assembly.

[0034] Specifically, in the related art, the connecting plate has two connecting ends, one of which is in direct contact and connection with the positive electrode ear of one of the two adjacent battery cells, and the other connecting end is in direct contact and connection with the negative electrode ear of the other of the two adjacent battery cells. The two adjacent battery cells are connected through the connecting plate, thereby completing the transmission of current.

[0035] However, in the related art, the contact surface between the connecting end and the tab is the end face of the connecting end, the cross-sectional area of the connecting end is small, the cross-sectional area of the entire connecting part is small, the overcurrent area of the connecting part is small, and the overcurrent capacity of the connecting part is poor; in addition, the above connection method has poor heat dissipation capacity of the battery.

[0036] In response to the above technical problems, the embodiments of the present application provide a battery assembly, a battery pack and an electrical device, so that the connector can connect two adjacent battery cells through the first surface and the second surface, thereby ensuring the normal transmission of current and the conductive performance of the connector; at the same time, the provision of an intermediate connecting portion helps to increase the cross-sectional area of the connector, thereby increasing the overcurrent area of the connector and maximizing the overcurrent capacity of the connector; at the same time, the heat generated by the current in the present application can be directly cooled through the connector, thereby helping to continuously take away the heat and improve the safety performance of the battery.

[0037] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. 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.

[0038] An embodiment of the present application provides a battery assembly 100. The battery assembly 100 may include a battery housing, a battery cell, and a battery cover. The battery cover is covered on the battery housing. The battery cell is located in the battery housing. A positive electrode and a negative electrode are provided on the battery cell.

[0039] In the embodiments of the present application, the battery cell may be a lithium battery cell, a sodium battery cell, or an energy storage battery cell. The battery housing may be an aluminum housing. This embodiment does not limit this.

[0040] In one embodiment of the present application, the positive electrode may include a positive electrode tab, and the negative electrode may include a negative electrode tab, the positive electrode tab and the negative electrode tab being connected to opposite sides of the battery cell, respectively. The battery cover may include a positive electrode cover and a negative electrode cover, the positive electrode cover and the negative electrode cover being mounted on opposite sides of the battery case. The positive electrode cover is welded to the positive electrode tab, and the negative electrode cover is welded to the negative electrode tab.

[0041] In another embodiment of the present application, the positive electrode may further include a positive electrode column, and the negative electrode may further include a negative electrode column. The positive electrode cover is welded to the positive electrode tab via the positive electrode column, and the negative electrode cover is welded to the negative electrode tab via the negative electrode column. This embodiment is not limited to this.

[0042] In the present application, refer to Figures 1 to 3 As shown, the battery assembly 100 may include at least two battery cells 110 and at least one conductive connector 120 , where the connector 120 is disposed between two adjacent battery cells 110 .

[0043] In the embodiments of the present application, there is no limitation on the number of battery cells 110 and connectors 120. For example, there may be two battery cells 110 and one connector 120, with the connector 120 positioned between two battery cells 110; alternatively, there may be three battery cells 110 and two connectors 120, with each connector 120 positioned between two adjacent battery cells 110; or alternatively, there may be multiple battery cells 110 and connectors 120. This embodiment does not impose any limitation on this.

[0044] In the embodiment of the present application, the connector 120 is a conductive member, which helps ensure the normal transmission of current and the conductive performance of the connector 120. The conductive material of the connector 120 is not limited. For example, the material of the connector 120 can be a single metal, a metal alloy, or a conductive non-metallic material, with common materials including pure copper, aluminum-copper composite, and steel-aluminum composite. This embodiment does not impose any restrictions on this.

[0045] In the present application, refer to Figure 4 and Figure 5As shown, the connector 120 includes a first surface 121 and a second surface 123. The first surface 121 is connected to one of two adjacent battery cells 110, and the second surface 123 is connected to the other of the two adjacent battery cells 110. This ensures connection between two adjacent battery cells 110, thereby ensuring normal current transmission and the conductive performance of the connector 120.

[0046] It should be noted that, in this embodiment, there is no limitation on the connection method between two adjacent battery cells 110 and the connector 120 .

[0047] Exemplarily, two adjacent battery cells 110 can be connected in series through the connector 120 , for example, the first surface 121 is connected to the positive electrode of one of the two adjacent battery cells, and the second surface 123 is connected to the negative electrode of the other of the two adjacent battery cells, thereby forming a series connection of two battery cells 110 .

[0048] Alternatively, for example, two adjacent battery cells 110 may be connected in parallel via the connector 120 , for example, the first surface 121 may be connected to the positive electrode of one of the two adjacent battery cells, and the second surface 123 may be connected to the positive electrode of the other of the two adjacent battery cells, thereby forming a parallel connection of the two battery cells 110 . This embodiment is not limited to this.

[0049] It should be noted that the position, size, shape, etc. of the first surface 121 and the second surface 123 are not limited. For example, the first surface 121 and the second surface 123 may be opposite end surfaces of the connector 120. The first surface 121 and the second surface 123 may be curved surfaces, flat surfaces, or surfaces of other shapes. The first surface 121 and the second surface 123 may be the same size or different sizes. This embodiment does not impose any restrictions on this, and specific configurations may be made based on actual needs.

[0050] In the embodiment of the present application, the first surface 121 and the second surface 123 are mainly used as an example to illustrate the two opposite end surfaces of the connecting member 120.

[0051] In order to improve the overcurrent capability of the connector 120, in the embodiment of the present application, referring to Figure 4 As shown, connector 120 may further include an intermediate connecting portion 122, with first surface 121, intermediate connecting portion 122, and second surface 123 sequentially connected. It is understood that intermediate connecting portion 122 is located between first surface 121 and second surface 123, and does not directly contact or connect with any two adjacent battery cells 110. This helps increase the cross-sectional area of connector 120, thereby increasing the current-carrying area of connector 120 and maximizing the current-carrying capacity of connector 120.

[0052] It should be noted that the specific structure of the intermediate connecting portion 122 is not limited. For example, the intermediate connecting portion 122 may be a solid structure, with the first surface 121 and the second surface 123 being opposite surfaces of the intermediate connecting portion 122. Alternatively, for example, the intermediate connecting portion 122 may be a frame structure. This embodiment does not limit this.

[0053] In order to further improve the heat dissipation capacity of the battery, in the embodiment of the present application, the connector 120 is a cooling member. In this way, the heat generated by the current in the present application can be directly cooled through the connector 120, thereby helping to continuously take away the heat, improve the safety performance of the battery, ensure the normal operation of the battery, and extend the service life of the battery.

[0054] In one possible implementation, referring to Figure 4 and Figure 5 As shown, a cooling channel 126 may be formed in the connector 120. It is understood that the intermediate connector 122 in the embodiment of the present application is a solid structure, and the cooling channel 126 is formed in the intermediate connector 122.

[0055] In an embodiment of the present application, coolant, refrigerant or circulating air can be injected into the cooling channel 126. In this way, on the basis of increasing the cross-sectional area of the connector 120 and improving the overcurrent capacity of the connector 120, the present application can also effectively dissipate heat from the battery cell 110. The heat generated by the battery cell 110 can be directly cooled by means of coolant, refrigerant or circulating air, and the heat can be continuously taken away.

[0056] In the present embodiment, there is no limitation on the formation method of the cooling channel 126. For example, the cooling channel 126 can be a separate cooling pipe installed inside the intermediate connecting portion 122. The cooling pipe can be a square tube, a round tube, or the like. Alternatively, the cooling channel 126 can be formed on the inner wall of the intermediate connecting portion 122 itself. This is not limited in the present embodiment.

[0057] It should be noted that, in the related art, the cooling element is generally arranged at the outermost side of the battery assembly 100, and the connecting plate is connected between the two battery cells 110. In the present application, the cooling element and the connecting plate at the outermost side of the battery assembly 100 are removed, and the cooling element and the connecting plate are combined together to form the connecting element 120 of the present application. The connecting element 120 is connected between the two battery cells 110, so that cooling and overcurrent can be carried out simultaneously, and the cooling efficiency and overcurrent efficiency are improved; at the same time, since the cooling element and the connecting plate at the outermost side of the battery assembly 100 are removed, the space utilization rate of the battery pack is greatly improved, and no separate connecting plate is required for connection and transition, which helps to save material costs and simplify module design.

[0058] In one possible implementation, referring to Figure 5 and Figure 6 As shown, the cooling channel 126 may have an inlet 127 and an outlet 128 , and the inlet 127 and the outlet 128 are located on the surface of the connector 120 and are arranged in a non-planar manner with the first surface 121 and the second surface 123 .

[0059] In the embodiment of the present application, there is no limitation on the shape, number, or size of the inlet 127 and outlet 128. For example, the inlet 127 and outlet 128 may be circular, square, or other shapes, which are not limited in this embodiment. For example, the inlet 127 and outlet 128 may be located on the same surface or on different surfaces.

[0060] It should be noted that the term "disparately disposed" means that the inlet 127 and outlet 128 are located on a different surface than the first surface 121 and the second surface 123. For example, the inlet 127 may be located on another surface of the intermediate connecting portion 122, and the outlet 128 may also be located on another surface of the intermediate connecting portion 122. This embodiment is not limited to this.

[0061] In this way, on the one hand, it helps to ensure the structural integrity of the first surface 121 and the second surface 123, ensure the connection stability between the first surface 121 and the battery cell 110, and the second surface 123 and the battery cell 110, and thus ensure the normal transmission of current; on the other hand, it will not affect the injection of coolant, refrigerant or circulating air, nor will it interfere with the removal of heat.

[0062] In one feasible embodiment, the cooling channel 126 has an inlet 127 and an outlet 128, and the inlet 127 and the outlet 128 are located on the same surface of the connector 120. This only requires the inlet 127 and the outlet 128 to be located on the same surface, which does not affect the structural integrity of other surfaces of the connector 120, helps ensure the sealing of the connector 120, and prevents coolant leakage. Furthermore, the manufacturing process is simple, which is conducive to improving the user experience.

[0063] It should be noted that the inlet 127 and the outlet 128 can also be the same opening, through which coolant, refrigerant, or circulating air enters the cooling channel 126, cools the heat generated by the current, and then continuously removes the heat from the opening. This helps further simplify the processing and further ensures the structural integrity of the connector 120, helping to ensure the sealing of the connector 120.

[0064] In one possible implementation, referring to Figure 5As shown, the connector 120 may further include a third surface 124 and a fourth surface 125 , the inlet 127 and the outlet 128 are located on the third surface 124 , and the terminal end of the cooling channel 126 is located on a side of the intermediate connecting portion 122 close to the fourth surface 125 .

[0065] In the embodiment of the present application, the position, size, shape, etc. of the third surface 124 and the fourth surface 125 are not limited. For example, the third surface 124 and the fourth surface 125 can be two opposing end surfaces of the connector 120. The third surface 124 and the fourth surface 125 can be curved surfaces, flat surfaces, or surfaces of other shapes. The third surface 124 and the fourth surface 125 can be the same size or different sizes. This embodiment does not limit this, and specific configurations can be made based on actual needs.

[0066] In this embodiment, the first surface 121 and the second surface 123 are arranged opposite to each other, and the third surface 124 and the fourth surface 125 are arranged opposite to each other. Specifically, the first surface 121 and the second surface 123 are the two side surfaces of the connecting member 120, the third surface 124 is the top surface of the connecting member 120, and the fourth surface 125 is the bottom surface of the connecting member 120.

[0067] In the embodiment of the present application, the terminal end of the cooling channel 126 is located on a side of the intermediate connecting portion 122 close to the fourth surface 125. This helps to maximize the cooling length of the cooling channel 126, thereby effectively dissipating heat from the battery cells 110. The heat generated by the battery cells 110 can be directly cooled by coolant, refrigerant, or circulating air, and the heat is continuously removed, thereby maximizing the cooling effect of the battery cells 110, ensuring the normal operation of the battery cells 110, and extending the service life of the battery cells 110, thereby extending the service life of the battery assembly 100 and the battery pack.

[0068] In one possible implementation, referring to Figure 4 and Figure 5 As shown, an isolation plate 1263 may be provided in the cooling channel 126 , and the cooling channel 126 is separated into a liquid inlet channel 1261 and a liquid outlet channel 1262 by the isolation plate 1263 , and at least part of the liquid inlet channel 1261 and at least part of the liquid outlet channel 1262 are connected.

[0069] It can be understood that the length of the isolation plate 1263 is smaller than the length of the cooling channel 126, and the liquid inlet channel 1261 and the liquid outlet channel 1262 are located on both sides of the isolation plate 1263. The coolant, refrigerant or circulating air enters from the liquid inlet channel 1261, circulates in the cooling channel 126 for one circle, and then flows out from the liquid outlet channel 1262.

[0070] In this way, the isolation plate 1263 can control the one-way flow of the coolant, refrigerant or circulating air, ensuring that the coolant, refrigerant or circulating air can only flow from the liquid inlet channel 1261 to the liquid outlet channel 1262, and cannot flow in the opposite direction; moreover, a filter screen or other filter elements can be set on the isolation plate 1263 to help remove impurities or particles in the liquid, ensure the purity of the fluid, and thereby ensure the normal flow of the coolant, refrigerant or circulating air.

[0071] In the embodiment of the present application, the arrangement of the isolation plate 1263 is not limited. For example, along the length of the cooling channel 126, the isolation plate 1263 can be vertically positioned within the cooling channel 126, with the liquid inlet channel 1261 and the liquid outlet channel 1262 located on the left and right sides of the isolation plate 1263; or, the isolation plate 1263 can be horizontally positioned within the cooling channel 126, with the liquid inlet channel 1261 and the liquid outlet channel 1262 located on the top and bottom sides of the isolation plate 1263. This embodiment does not limit this arrangement.

[0072] In one practicable embodiment, two adjacent battery cells 110 can be welded via the connector 120. Specifically, welding is performed sequentially along the first side 121, the fourth side 125, the third side 124, and the second side 123 of the connector 120, with a circumferential weld. This helps to improve the welding strength and safety between the connector 120 and the battery cells 110, thereby improving the structural strength and safety of the battery assembly 100 and the battery pack, thereby maximizing the structural strength and safety of the electrical equipment.

[0073] In one achievable embodiment, the welding depth between the first surface 121 and one of the two adjacent battery cells 110 may be between 1 mm and 5 mm. For example, the welding depth between the first surface 121 and one of the two adjacent battery cells 110 may be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, or any value between 1 mm and 5 mm.

[0074] The welding depth between the second surface 123 and the other of the two adjacent battery cells 110 may be between 1 mm and 5 mm. For example, the welding depth between the second surface 123 and the other of the two adjacent battery cells 110 may be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, or any value between 1 mm and 5 mm.

[0075] By limiting the above-mentioned welding depth, on the one hand, when the welding depth between the first surface 121 and the second surface 123 and the battery cell 110 is less than 1 mm, the welding strength between the connector 120 and the battery cell 110 cannot be ensured, and the structural strength and structural stability of the connector 120 and the battery cell 110 are poor; on the other hand, when the welding depth between the first surface 121 and the second surface 123 and the battery cell 110 is greater than 5 mm, if the connector 120 is thin, there is a risk of welding through the first surface 121 or the second surface 123, which is not conducive to ensuring the structural strength and structural sealing of the connector 120.

[0076] Therefore, by limiting the welding depth between the first surface 121 and one of the two adjacent battery cells 110 to between 1 mm and 5 mm, and limiting the welding depth between the second surface 123 and the other of the two adjacent battery cells 110 to between 1 mm and 5 mm, this helps ensure the welding strength between the connector 120 and the battery cells 110, thereby maximizing the structural strength and stability of the connector 120 and the battery cells 110. It also reduces the risk of welding through the first surface 121 or the second surface 123, thereby maximizing the structural strength and sealing of the connector 120.

[0077] An embodiment of the present application provides a battery pack, which may include a battery assembly 100 . The number of the battery assemblies 100 may include multiple, and any two adjacent battery assemblies 100 in the multiple battery assemblies 100 may be connected via a connector 120 .

[0078] In the embodiment of the present application, there is no limitation on the connection method of any two adjacent battery assemblies 100 in the plurality of battery assemblies 100. For example, any two adjacent battery assemblies 100 may be connected in series via the connector 120, or any two adjacent battery assemblies 100 may be connected in parallel via the connector 120. This embodiment does not impose any limitation on this.

[0079] An embodiment of the present application provides an electrical device, including an electrical device and a battery pack, wherein the battery pack is used to provide electrical energy to the electrical device.

[0080] The electrical equipment in the embodiments of the present application may be a vehicle. For example, the vehicle may be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. Accordingly, the electrical device may be the vehicle's drive mechanism or the vehicle's control system.

[0081] In addition, the electrical equipment may also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships and spacecraft, etc., among which the spacecraft may include airplanes, rockets, space shuttles or spacecraft.

[0082] Since the electric device in this embodiment includes the battery pack described in any of the above embodiments, the structure and beneficial effects of the electric device including the battery pack will not be further described in this embodiment.

[0083] The embodiments of the present application provide a battery assembly, a battery pack, and an electrical device, comprising at least two battery cells and at least one conductive connector. The connector is disposed between two adjacent battery cells and comprises a first surface, an intermediate connector, and a second surface, which are sequentially connected. Thus, the connector, through the first surface and the second surface, can connect the two adjacent battery cells, thereby ensuring normal current transmission and the connector's electrical conductivity. Simultaneously, the intermediate connector increases the connector's cross-sectional area, thereby increasing the connector's current flow area and maximizing the connector's current flow capacity. Furthermore, the connector is a cooling element. Thus, the heat generated by the current in the present application can be directly cooled by the connector, thereby helping to continuously remove the heat, improve the battery's safety, ensure the battery's normal operation, and extend the battery's service life.

[0084] It should be noted that, in the description of the embodiments of this application, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0085] In the description of the embodiments of the present application, the term "and / or" merely represents a type of association relationship describing associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the term "at least one" represents any combination of at least two of any one or more of a plurality of items. For example, at least one of A, B, and C may represent any one or more elements selected from a set including A, B, and C.

[0086] In the description of the embodiments of the present application, the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like indicate positions or location relationships based on the positions or location relationships shown in the accompanying drawings. These terms are intended only 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 specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present application. Furthermore, the term "plurality" means two or more, unless otherwise specifically specified.

[0087] In the description of the embodiments of the present application, the terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0088] 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 assembly, characterized in that: include: At least two battery cells (110) and at least one conductive connector (120), wherein the connector (120) is disposed between two adjacent battery cells (110); the connector (120) comprises a first surface (121), an intermediate connecting portion (122), and a second surface (123) connected in sequence; The first surface (121) is connected to one of the two adjacent battery cells (110), and the second surface (123) is connected to the other of the two adjacent battery cells (110); Wherein, the connecting member (120) is a cooling member.

2. The battery assembly according to claim 1, wherein: A cooling channel (126) is formed in the connecting member (120).

3. The battery assembly according to claim 2, wherein: The cooling channel (126) has an inlet (127) and an outlet (128), and the inlet (127) and the outlet (128) are located on the surface of the connecting member (120) and are arranged in a different plane from the first surface (121) and the second surface (123).

4. The battery assembly according to claim 2, wherein: The cooling channel (126) has an inlet (127) and an outlet (128), and the inlet (127) and the outlet (128) are located on the same surface of the connecting member (120).

5. The battery assembly according to claim 4, characterized in that The connecting member (120) further includes a third surface (124) and a fourth surface (125), the inlet (127) and the outlet (128) are located on the third surface (124), and the terminal end of the cooling channel (126) is located on a side of the intermediate connecting portion (122) close to the fourth surface (125).

6. The battery assembly according to claim 5, characterized in that The first surface (121) and the second surface (123) are arranged opposite to each other, and the third surface (124) and the fourth surface (125) are arranged opposite to each other.

7. The battery assembly according to any one of claims 2 to 5, characterized in that: An isolation plate (1263) is provided in the cooling channel (126), and the cooling channel (126) is separated into a liquid inlet channel (1261) and a liquid outlet channel (1262) by the isolation plate (1263), and at least part of the liquid inlet channel (1261) and at least part of the liquid outlet channel (1262) are connected.

8. The battery assembly according to any one of claims 1 to 5, characterized in that: The battery cell (110) includes a battery core, on which a positive electrode and a negative electrode are provided, the first surface (121) is connected to the positive electrode of one of two adjacent battery cells, and the second surface (123) is connected to the negative electrode of the other of the two adjacent battery cells.

9. The battery assembly according to any one of claims 1 to 5, characterized in that: Two adjacent battery cells (110) are welded via the connecting piece (120).

10. The battery assembly according to claim 9, characterized in that The welding depth between the first surface (121) and one of the two adjacent battery cells (110) is between 1 mm and 5 mm; And / or, the welding depth between the second surface (123) and the other of the two adjacent battery cells (110) is between 1 mm and 5 mm.

11. A battery pack comprising the battery assembly according to any one of claims 1 to 10.

12. The battery pack according to claim 11, wherein: The number of the battery assemblies includes multiple, and two adjacent battery assemblies in the multiple battery assemblies are connected by a connector.

13. An electrical device, characterized in that: It comprises an electrical device and the battery pack according to claim 11 or 12.

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