Battery device and electric device

Abstract

The embodiment of the invention provides a battery device and a power utilization device. The battery device comprises a box body, a battery monomer group, a circuit board, a first temperature acquisition assembly and a second temperature acquisition assembly, the battery monomer group is arranged in the box body, and the battery monomer group comprises a plurality of battery monomers arranged along a first direction; the circuit board is arranged on one side of the battery monomer group along a second direction, and the second direction is perpendicular to the first direction; the first temperature acquisition assembly is electrically connected with the circuit board, and the first temperature acquisition assembly is used for acquiring temperature information of air in the box body; the second temperature acquisition assembly is electrically connected with the circuit board, and the second temperature acquisition assembly is used for acquiring temperature information of the battery monomers; the first temperature collection assembly comprises a first support and a first temperature collection part, and the first temperature collection part is arranged on the first support and electrically connected with the circuit board. According to the technical scheme provided by the invention, the safety of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to a battery device and an electrical device. Background Art

[0002] In recent years, new energy vehicles have achieved leapfrog development. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also increasing day by day. Among them, battery devices, as the core components of new energy vehicles, have relatively high requirements in terms of use stability and reliability.

[0003] With the popularization of electric vehicles and the improvement of energy density, fires in electric vehicles occur from time to time. A large part of the fires in electric vehicles are caused by thermal runaway of the battery. Therefore, how to improve the safety of the battery is an urgent technical problem in battery technology. Summary of the Invention

[0004] The present application provides a battery device and an electrical device, which can improve the safety of the battery device.

[0005] The present application is implemented by the following technical solutions: In a first aspect, an embodiment of the present application provides a battery device. The battery device includes a box body, a battery cell group, a circuit board, a first temperature acquisition component, and a second temperature acquisition component. The battery cell group is disposed in the box body, and the battery cell group includes a plurality of battery cells arranged along a first direction; the circuit board is disposed on one side of the battery cell group along a second direction, and the second direction is perpendicular to the first direction; the first temperature acquisition component is electrically connected to the circuit board, and the first temperature acquisition component is used to acquire the temperature information of the air in the box body; the second temperature acquisition component is electrically connected to the circuit board, and the second temperature acquisition component is used to acquire the temperature information of the battery cells; the first temperature acquisition component includes a first bracket and a first temperature acquisition component, and the first temperature acquisition component is disposed on the first bracket and is electrically connected to the circuit board.

[0006] In the technical solution of the embodiment of the present application, through the settings of the first temperature acquisition component and the second temperature acquisition component in the battery device, the first temperature acquisition component can directly acquire the temperature information of the air in the box body, and the second temperature acquisition component can acquire the temperature information of the battery cell. Under the combined action of the first temperature acquisition component and the second temperature acquisition component, the temperature information of the battery cell and the air in the box body of the battery device can be monitored, increasing the ways of monitoring the thermal runaway risk of the battery device, being able to more comprehensively feedback the internal temperature information of the battery device, reducing the risk of thermal runaway monitoring failure caused by the failure of single temperature monitoring, being able to more accurately identify the thermal runaway risk of the battery device, and improving the safety of the battery device. The first temperature acquisition component is arranged on the first bracket, and the first bracket can play a role of carrying and fixing the first temperature acquisition component, improving the installation stability of the first temperature acquisition component. The first temperature acquisition component is electrically connected to the circuit board, and the circuit board can supply power to the first temperature acquisition component to realize the acquisition of the air temperature information above the battery cell group.

[0007] According to some embodiments of the present application, the first bracket is an insulating part.

[0008] In the above solution, by using the first bracket as an insulating part, there is no risk of short circuit between the first temperature acquisition component and the first bracket.

[0009] According to some embodiments of the present application, the second temperature acquisition component includes a second bracket and a second temperature acquisition component. The second bracket is an insulating part, the second temperature acquisition component is arranged on the second bracket, and the second temperature acquisition component is electrically connected to the circuit board.

[0010] In the above solution, the second temperature acquisition component is arranged on the second bracket, and the second bracket can play a role of carrying and fixing the second temperature acquisition component, improving the installation stability of the second temperature acquisition component. By using the second bracket as an insulating part, there is no risk of short circuit between the second temperature acquisition component and the second bracket. The second temperature acquisition component is electrically connected to the circuit board, and the circuit board can supply power to the second temperature acquisition component to realize the acquisition of the temperature information of the battery cell.

[0011] According to some embodiments of the present application, along the second direction, the distance between the first temperature acquisition component and the battery cell group is greater than the distance between the second temperature acquisition component and the battery cell group.

[0012] In the above scheme, the distance between the first temperature collection component and the battery cell group is greater than the distance between the second temperature collection component and the battery cell group. The first temperature collection component is farther from the battery cell group than the second temperature collection component, that is, the first temperature collection component is farther from the battery cell group. When the first temperature collection component collects the temperature information of the air in the box, the first temperature collection component is not easily affected by the thermal radiation of the battery cell group itself. The first temperature collection component can more accurately collect the temperature information of the air above the battery cell group.

[0013] According to some embodiments of the present application, the first bracket includes a first body and a boss. Along the second direction, the boss is arranged on a side of the first body away from the battery cell group, and the first temperature collection component is arranged on the boss.

[0014] In the above scheme, the first bracket includes a first body and a boss, and the first temperature collection component is arranged on the boss, and the boss is protruding from the first body. The boss can not only provide the first temperature collection component with the function of bearing and positioning, but also can overheadly arrange the first temperature collection component on the first bracket. The first temperature collection component can be further away from the battery cell group, and the first temperature collection component is less susceptible to the temperature of the battery cell, and can more accurately collect the temperature information of the air in the box.

[0015] According to some embodiments of the present application, the circuit board includes a main body and a first cantilever portion, one end of the first cantilever portion is connected to the main body, and the other end of the first cantilever portion is electrically connected to the first temperature collection component.

[0016] In the above scheme, by setting the first cantilever part on the circuit board, the circuit board can be electrically connected to the first temperature collection component through the first cantilever part, and the first cantilever part itself can be locally deformed relative to the main body part, which can absorb the installation error between the first temperature collection component and the circuit board, and is more conducive to the precise connection between the circuit board and the first temperature collection component.

[0017] According to some embodiments of the present application, along the second direction, the boss protrudes from a side of the main body away from the battery cell group.

[0018] In the above scheme, the boss is protruded from the side of the main body away from the battery cell group, that is, the height of the boss is higher than the height of the main body of the circuit board, so that the installation height of the first temperature collection component is higher, the distance between the first temperature collection component and the battery cell group is farther, the first temperature collection component is less susceptible to the thermal radiation of the battery cell group, and the first temperature collection component can more accurately collect the temperature information of the air above the battery cell group.

[0019] According to some embodiments of the present application, the first cantilever portion is a bent structure.

[0020] In the above solution, the first cantilever part is adopted as a bent structure, and the first cantilever part can be bent and deformed. On the one hand, the first cantilever part can absorb the installation error between the first temperature acquisition component and the first cantilever part. On the other hand, when the circuit board and the first temperature acquisition component have a slight relative movement, the first cantilever part can still maintain the electrical connection between the circuit board and the first temperature acquisition component by virtue of its own deformation, with higher stability.

[0021] According to some embodiments of the present application, the first temperature acquisition assembly further includes a first reinforcing plate. The first reinforcing plate is an insulating part. The first reinforcing plate is disposed on the convex platform. The first reinforcing plate has a first receiving groove, and the first temperature acquisition component is disposed in the first receiving groove.

[0022] In the above solution, through the arrangement of the first reinforcing plate, the first temperature acquisition component is disposed in the first receiving groove of the first reinforcing plate. On the one hand, the first reinforcing plate can perform an insulating encapsulation function on the first temperature acquisition component, so that the first temperature acquisition component is not exposed to the external environment, playing a protective role for the first temperature acquisition component and also reducing the risk of short circuit. On the other hand, the first temperature acquisition component is mounted on the first bracket through the first reinforcing plate. Compared with the first temperature acquisition component being mounted on the first bracket by itself, the connection between the first reinforcing plate and the first bracket can increase the installation stability of the first temperature acquisition component.

[0023] According to some embodiments of the present application, a part of the first cantilever part is located between the first reinforcing plate and the convex platform.

[0024] In the above solution, a part of the first cantilever part is located between the first reinforcing plate and the convex platform. The first cantilever part has an overlapping part with the convex platform and the first temperature acquisition component. The convex platform provides a supporting and positioning function for the first cantilever part. Compared with the connection between the first temperature acquisition component and the first cantilever part in the area outside the convex platform, the installation stability of the first cantilever part is higher, and the first cantilever part is less likely to be separated from the first temperature acquisition component.

[0025] According to some embodiments of the present application, along the second direction, the first receiving groove penetrates through the first reinforcing plate. The first temperature acquisition assembly further includes a first sealing member, and the first sealing member closes one end of the first receiving groove facing away from the convex platform.

[0026] In the above solution, the first sealing member closes one end of the first receiving groove facing away from the convex platform. The first sealing member can play a role in dust prevention, reducing the risk of affecting the acquisition accuracy of the first temperature acquisition component due to dust entering the first receiving groove and adhering to the surface of the first temperature acquisition component.

[0027] According to some embodiments of the present application, the first bracket also includes a first heat rivet column, which is arranged on the boss, and the first reinforcement plate has a first through hole for the first heat rivet column to pass through, and the first heat rivet column is used to hot-rivet the first reinforcement plate to the boss.

[0028] In the above scheme, by arranging a first heat rivet column on the boss, the first heat rivet column can fix the first reinforcement plate to the boss by heat rivet, and the installation stability of the first reinforcement plate on the boss is higher, thereby improving the installation stability of the first temperature collection component, and reducing the risk of poor contact between the first temperature collection component and the first cantilever portion of the circuit board due to movement or even loosening of the first reinforcement plate and the boss.

[0029] According to some embodiments of the present application, the first bracket further includes a snap-fit ​​portion, one end of which is connected to the first body, and the other end of which is snap-fitted to a side of the first reinforcement plate facing away from the boss.

[0030] In the above scheme, a snap portion is provided on the first bracket, and the upper end of the snap portion is clamped on the side of the first reinforcement plate away from the boss. The snap portion can support and limit the first reinforcement plate. Under the action of the first hot rivet column to fix the first reinforcement plate, the snap portion can further improve the installation stability between the first reinforcement plate and the boss, and further reduce the risk of poor contact between the first temperature collection component and the circuit board due to movement or even loosening of the first reinforcement plate.

[0031] According to some embodiments of the present application, a battery cell includes an electrode terminal; the battery device also includes a plurality of first busbars and a plurality of second busbars, the first busbars are connected to the electrode terminals, and the second busbars are connected to the electrode terminals; the plurality of first busbars are arranged in a row along a first direction and are located on a first side of a circuit board, the plurality of second busbars are arranged in a row along the first direction and are located on a second side of the circuit board, the first side and the second side are spaced apart along a third direction, and the third direction, the second direction and the first direction are perpendicular to each other.

[0032] In the above scheme, the first busbar electrically connects the electrode terminals on one side of the third direction of the battery cell, and the second busbar electrically connects the electrode terminals on the other side of the third direction of the battery cell. The first busbar and the second busbar work together to complete the electrical connection of the electrode terminals of multiple battery cells in the battery cell group.

[0033] According to some embodiments of the present application, the battery device further includes an isolation plate, and at least a portion of the isolation plate is disposed between the battery cell group and the circuit board along the second direction.

[0034] In the above solution, the isolation plate is arranged between the battery cell group and the circuit board. The isolation plate can fix and protect the battery cell group, provide heat insulation and protection functions, and ensure the reliability and safety of the battery device.

[0035] According to some embodiments of the present application, the first bracket further includes a first extension portion and a second extension portion, and the first extension portion and the second extension portion are respectively disposed at two ends of the first body along the third direction; along the second direction, the first extension portion is disposed between the first bus bar and the isolation plate, and the second extension portion is disposed between the second bus bar and the isolation plate.

[0036] In the above solution, through the arrangement of the first extension portion and the second extension portion on the first bracket, the first extension portion is disposed between the first bus bar and the isolation plate, and the second extension portion is disposed between the second bus bar and the isolation plate. The first bus bar and the isolation plate respectively function to press and position the first extension portion, and the second bus bar and the isolation plate can function to press and position the second extension portion, so as to realize the pressing and fixing of both ends of the first bracket in the third direction. The installation of the first bracket is convenient and fast, and there is no need to perform fixing operations such as riveting or bonding on the first bracket. And when the first temperature acquisition component needs to be maintained and replaced subsequently, the first bracket can be quickly disassembled, and the first bracket is convenient to install and disassemble.

[0037] According to some embodiments of the present application, the battery cell includes a pressure relief mechanism, and the first body has a first relief hole for avoiding the pressure relief mechanism.

[0038] In the above solution, through the arrangement of the first relief hole on the first body, the first relief hole can function to avoid the pressure relief mechanism of the battery cell and will not affect the normal operation of the pressure relief mechanism.

[0039] According to some embodiments of the present application, the second bracket has a first window, and the second temperature acquisition component is installed in the first window; the second temperature acquisition assembly further includes a heat conduction pad, and the second temperature acquisition component is thermally connected to the battery cell through the heat conduction pad.

[0040] In the above solution, through the arrangement of the first window on the second bracket, the first window can function to avoid the heat conduction pad. The second temperature acquisition component is thermally connected to the battery cell through the heat conduction pad, and the heat conduction pad can function to transfer heat, so as to enable the second temperature acquisition component to collect the temperature information of the battery cell, reduce the heat loss, and improve the accuracy of the second temperature acquisition component in collecting the temperature of the battery cell.

[0041] In a second aspect, an electrical device according to an embodiment of the present application includes the battery device of any one of the foregoing embodiments, and the electrical device is used to provide electrical energy.

[0042] The electrical device provided by the embodiment of the present application has the same technical effects as those of the battery device provided by any one of the foregoing embodiments, and will not be elaborated herein.

[0043] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0045] Figure 1 Structural schematic diagram of a vehicle provided for some embodiments of the present application; Figure 2 Exploded structural schematic diagram of a battery device provided for some embodiments of the present application; Figure 3 Explosion schematic diagram of a battery cell in a battery device provided for some embodiments of the present application; Figure 4 Structural schematic diagram of a temperature acquisition component, a circuit board, and a bus bar in a battery device provided for some embodiments of the present application; Figure 5 For Figure 4 Enlarged schematic diagram of A in Figure 6 Partial cross-sectional view of the cooperation between a first temperature acquisition component and a circuit board and a bus bar in a battery device provided for some embodiments of the present application; Figure 7 For Figure 4 Enlarged schematic diagram of B in Figure 8 Partial cross-sectional view of the cooperation between a second temperature acquisition component and a circuit board and a bus bar in a battery device provided for some embodiments of the present application; Figure 9 Structural schematic diagram of a first bracket in a battery device provided for some embodiments of the present application; Figure 10 Partial exploded schematic diagram of the cooperation between a first temperature acquisition component and a circuit board and a bus bar in a battery device provided for some embodiments of the present application; Figure 11 Structural schematic diagram of a second bracket in a battery device provided for some embodiments of the present application.

[0046] Icons: 1000 - Vehicle; 100 - Battery device; 200 - Controller; 300 - Motor; 10 - Box; 11 - First sub - box; 12 - Second sub - box; 20 - Battery cell; 21 - Outer shell; 211 - Housing; 212 - End cover; 213 - First wall; 22 - Electrode assembly; 23 - Electrode terminal; 24 - Battery cell group; 30 - Circuit board; 31 - Main body; 32 - First cantilever; 40 - First temperature acquisition component; 41 - First bracket; 411 - First body; 4111 - First avoidance hole; 412 - Boss; 413 - First thermal rivet post; 414 - Buckle part; 415 - First extension; 416 - Second extension; 42 - First temperature acquisition part; 43 - First reinforcement plate; 431 - First accommodation groove; 44 - First seal; 50 - Second temperature acquisition component; 51 - Second bracket; 511 - Second body; 512 - Third extension; 513 - Fourth extension; 514 - First window; 515 - Second thermal rivet post; 516 - Second avoidance hole; 52 - Second temperature acquisition part; 53 - Thermal conductive pad; 54 - Second reinforcement plate; 61 - First bus bar; 62 - Second bus bar; 70 - Separator; 71 - Third thermal rivet post; X - First direction; Y - Second direction; Z - Third direction. Detailed implementation manners

[0047] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some but not all of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the description of this application in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description and claims of this application or the above - mentioned drawings are intended to cover non - exclusive inclusion. The terms "first", "second", etc. in the description and claims of this application or the above - mentioned drawings are used to distinguish different objects and are not used to describe a specific order or primary - secondary relationship.

[0049] References to "embodiments" in this application mean that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0050] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "joined", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0052] The "plurality" mentioned in this application refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0053] The battery device (BatteryApparatus) mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (BatteryCellAssembly) may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0054] In some embodiments, the battery cell assembly (BatteryCellAssembly) is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module (BatteryModule), and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0055] In some embodiments, the battery device can be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0056] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box by fixing the battery module in the box.

[0057] As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells to the box.

[0058] In some embodiments, the box can be part of the chassis structure of a vehicle. For example, a part of the box can be at least part of the floor of the vehicle, or a part of the box can be at least part of the crossbeam and longitudinal beam of the vehicle.

[0059] In some embodiments, the battery device can be an energy storage device. The energy storage device includes an energy storage container, an energy storage electrical cabinet, etc.

[0060] In the embodiments of the present application, the battery cell can be a secondary battery, and a secondary battery refers to a battery cell that can activate the active material by charging after discharging the battery cell and can be used continuously.

[0061] The battery cell can be, but is not limited to, a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc.

[0062] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the short circuit between the positive and negative electrodes and at the same time allow the active ions to pass through.

[0063] In some embodiments, the positive electrode can be a positive electrode sheet, and the positive electrode sheet can include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0064] As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is disposed on any one or both of the two opposite surfaces of the positive electrode current collector.

[0065] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, stainless steel with silver plating on the surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a polymer material substrate layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0066] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphate, lithium transition metal oxide, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as the positive electrode active material of the battery cell can also be used.

[0067] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative electrode current collector.

[0068] As an example, the negative electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with silver plating on the surface, stainless steel with silver plating on the surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel, or titanium, etc. can be used.

[0069] In some embodiments, the negative electrode current collector has two surfaces opposite to each other in its own thickness direction, and the negative electrode active material is disposed on either one or both of the two opposite surfaces of the negative electrode current collector.

[0070] As an example, the negative electrode active material can be a negative electrode active material for a battery cell well-known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based material, tin-based material, and lithium titanate, etc. The silicon-based material can be selected from at least one of elemental silicon, silicon oxide compound, silicon-carbon composite, silicon-nitrogen composite, and silicon alloy. The tin-based material can be selected from at least one of elemental tin, tin oxide compound, and tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as the negative electrode active material of the battery cell can also be used. These negative electrode active materials can be used alone or in combination of two or more.

[0071] In some embodiments, the separator is an isolation film. The present application has no particular limitation on the type of the isolation film, and any well-known porous structure isolation film with good chemical stability and mechanical stability can be selected.

[0072] As an example, the main material of the isolation film can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The isolation film can be a single-layer film or a multi-layer composite film, without particular limitation. When the isolation film is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or can be attached to the surfaces of the positive and negative electrodes.

[0073] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously plays the role of transmitting ions and isolating the positive and negative electrodes.

[0074] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0075] In some embodiments, the electrode assembly has a laminated structure.

[0076] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0077] In some embodiments, the housing includes an end cap and a housing body. The housing body is provided with an opening, and the end cap closes the opening to form a sealed space for accommodating substances such as the electrode assembly and the electrolyte. The housing body may be provided with one or more openings. One or more end caps may also be provided.

[0078] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing body.

[0079] In some embodiments, a safety valve is provided on the housing. The safety valve is used to release the internal pressure of the battery cell.

[0080] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc. There is no particular limitation in the embodiments of the present application.

[0081] In battery technology, the existing temperature acquisition position of the battery device is at the top of the battery cell group. Generally, the temperature of the top cover of the battery cell is collected to reflect the temperature of the battery device. However, the temperature acquisition of the battery cell has a certain lag, there is a certain difference between the temperature of the top cover of the battery cell and the temperature in the middle of the battery cell, and it is transmitted to the temperature acquisition component through the heat conduction silicone gel. The temperature acquisition is unstable and cannot accurately and reliably identify the thermal runaway risk of the battery device, and the safety performance of the battery device is poor.

[0082] In view of this, in order to improve the safety of the battery device, some embodiments of the present application provide a battery device, which includes a box body, a battery cell group, a circuit board, a first temperature acquisition component, and a second temperature acquisition component. The battery cell group is arranged in the box body and includes a plurality of battery cells arranged along a first direction; the circuit board is arranged on one side of the battery cell group along a second direction, and the second direction is perpendicular to the first direction; the first temperature acquisition component is electrically connected to the circuit board and is used for acquiring the temperature information of the air in the box body; the second temperature acquisition component is electrically connected to the circuit board and is used for acquiring the temperature information of the battery cells.

[0083] For the battery device provided by the embodiment of the present application, the first temperature acquisition component can directly acquire the temperature information of the air in the box body, and the second temperature acquisition component can acquire the temperature information of the battery cells. Under the combined action of the first temperature acquisition component and the second temperature acquisition component, the temperature information of the battery cells and the air in the box body of the battery device can be monitored, increasing the ways of monitoring the thermal runaway risk of the battery device, being able to more comprehensively feedback the internal temperature information of the battery device, reducing the risk of thermal runaway monitoring failure caused by the failure of single temperature monitoring, being able to more accurately identify the thermal runaway risk of the battery device, and improving the safety of the battery device.

[0084] The battery device disclosed in the embodiment of the present application can be but is not limited to being used in electrical equipment such as vehicles, ships, or aircraft. The power supply system of the electrical equipment can be composed of the battery device disclosed in the present application.

[0085] The technical solutions described in the embodiments of the present application are applicable to various electrical equipment using battery cells and battery devices. For example, mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0086] For the convenience of description, the following embodiments take a vehicle as an example of an electrical equipment in an embodiment of the present application for illustration.

[0087] Please refer to Figure 1 , Figure 1Schematic structural diagram of vehicle 1000 provided by some embodiments of the present application. Vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside vehicle 1000, and the battery device 100 can be arranged at the bottom, head or tail of vehicle 1000. The battery device 100 can be used for power supply of vehicle 1000. For example, the battery device 100 can be used as the operating power source of vehicle 1000 and is used for the circuit system of vehicle 1000, such as the working power consumption requirements for starting, navigating and running of vehicle 1000.

[0088] Vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power consumption requirements during the start, navigation and driving of vehicle 1000.

[0089] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of vehicle 1000, but also be used as the driving power source of vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1000.

[0090] Please refer to Figure 2 , Figure 2 Schematic exploded view of the structure of the battery device 100 provided by some embodiments of the present application. The battery device 100 includes a box body 10 and battery cells 20, and the battery cells 20 are accommodated in the box body 10. Among them, the box body 10 is used to provide an accommodation space for the battery cells 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 may include a first sub-box body 11 and a second sub-box body 12. The first sub-box body 11 and the second sub-box body 12 cover each other, and the first sub-box body 11 and the second sub-box body 12 jointly define an accommodation space for accommodating the battery cells 20. The second sub-box body 12 can be a hollow structure with one end open, and the first sub-box body 11 can be a plate-like structure. The first sub-box body 11 covers the open side of the second sub-box body 12 so that the first sub-box body 11 and the second sub-box body 12 jointly define an accommodation space; the first sub-box body 11 and the second sub-box body 12 can also both be hollow structures with one side open, and the open side of the first sub-box body 11 covers the open side of the second sub-box body 12.

[0091] In the battery device 100, there may be multiple battery cells 20. The multiple battery cells 20 can be connected in series, parallel, or in a combined series-parallel connection. A combined series-parallel connection means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, parallel, or in a combined series-parallel connection together, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10. Of course, in the battery device 100, multiple battery cells 20 can also be first connected in series, parallel, or in a combined series-parallel connection to form a battery module, and then multiple battery modules are connected in series, parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box 10.

[0092] The battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar for realizing electrical connection among the multiple battery cells 20.

[0093] Please refer to Figure 3 , Figure 3 , which is a schematic diagram of the explosion structure of the battery cell 20 provided in the embodiment of the present application. The battery cell 20 includes a housing 21, an electrode assembly 22, and an electrode terminal 23. The housing 21 includes a casing 211 and an end cap 212. The casing 211 has an opening, and the end cap 212 closes the opening to isolate the internal environment of the battery cell 20 from the external environment.

[0094] The casing 211 is a component for cooperating with the end cap 212 to form the internal environment of the battery cell 20. Among them, the formed internal environment can be used to accommodate the electrode assembly 22, the electrolyte, and other components. The casing 211 and the end cap 212 can be independent components. The casing 211 can be in various shapes and sizes. Specifically, the shape of the casing 211 can be determined according to the specific shape and size of the electrode assembly 22. The material of the casing 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0095] The end cap 212 is a component that covers the opening of the casing 211 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 212 can be adapted to the shape of the casing 211 to cooperate with the casing 211. Optionally, the end cap 212 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 212 is not easily deformed when being squeezed or collided, so that the battery cell 20 can have higher structural strength and the reliability can also be improved. Functional components such as the electrode terminal 23 can be provided on the end cap 212. The end cap 212 includes a first wall 213, and the electrode terminal 23 is provided on the first wall 213. The electrode terminal 23 can be used for electrically connecting with the electrode assembly 22 to output or input the electric energy of the battery cell 20. The material of the end cap 212 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The embodiment of the present application does not make special restrictions on this.

[0096] The electrode assembly 22 is a component in the battery cell 20 where an electrochemical reaction occurs. One or more electrode assemblies 22 may be contained within the housing 211.

[0097] An embodiment of the present application provides a battery device. Please refer to Figure 2 , Figure 4 , Figure 5 and Figure 6 . The battery device 100 includes a box body 10, a battery cell group 24, a circuit board 30, a first temperature acquisition component 40, and a second temperature acquisition component 50. The battery cell group 24 is disposed within the box body 10. The battery cell group 24 includes a plurality of battery cells 20 arranged along a first direction X. The circuit board 30 is disposed on one side of the battery cell group 24 along a second direction Y, and the second direction Y is perpendicular to the first direction X. The first temperature acquisition component 40 is electrically connected to the circuit board 30, and the first temperature acquisition component 40 is used to acquire the temperature information of the air inside the box body. The second temperature acquisition component 50 is electrically connected to the circuit board 30, and the second temperature acquisition component 50 is used to acquire the temperature information of the battery cell 20. The first temperature acquisition component 40 includes a first bracket 41 and a first temperature acquisition component 42. The first temperature acquisition component 42 is disposed on the first bracket 41, and the first temperature acquisition component 42 is electrically connected to the circuit board 30. Please refer to Figure 2 . The box body 10 refers to a box body structure for accommodating the battery cell group 24, and the box body 10 is used to provide an accommodation space for the battery cell group 24. The battery cell group 24 includes a plurality of battery cells 20. The plurality of battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the plurality of battery cells 20. The plurality of battery cells 20 may be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the plurality of battery cells 20 is accommodated within the box body.

[0098] The circuit board 30 may be a flexible circuit board or a rigid circuit board. The circuit board 30 is disposed on one side of the battery cell group 24 along the second direction Y, and the second direction Y is perpendicular to the first direction X. The second direction Y may be parallel to the thickness direction of the circuit board 30.

[0099] The first temperature acquisition component 40 refers to a monitoring mechanism disposed inside the box body 10 that can acquire the temperature information of the air inside the box body. The first temperature acquisition component 40 may be disposed on one side of the battery cell group 24 along the second direction Y, or may be disposed on the inner wall of the box body. The first temperature acquisition component 40 is electrically connected to the circuit board 30, and the circuit board 30 supplies power to the first temperature acquisition component 40 and transmits temperature signals.

[0100] The first temperature acquisition component 42 refers to a sensor that can monitor the temperature information of the air inside the box. The first temperature acquisition component 42 can be an NTC (Negative Temperature Coefficient) thermistor. A negative temperature coefficient thermistor, also known as an NTC thermistor, is a type of sensor resistor whose resistance value decreases as the temperature increases.

[0101] The second temperature acquisition component 50 refers to a monitoring mechanism arranged inside the box 10 that can acquire the temperature information of the battery cell 20. The second temperature acquisition component 50 can be thermally conductively connected to the outer wall of the battery cell 20 to acquire the temperature information of the battery cell 20.

[0102] In the battery device 100, the number of the first temperature acquisition components 40 and the second temperature acquisition components 50 can be one group or multiple groups. The number and positions of the multiple groups of the first temperature acquisition components 42 and the second temperature acquisition components 50 can be arranged as required, specifically depending on the actual situation.

[0103] Both the first temperature acquisition component 40 and the second temperature acquisition component 50 can be communicatively connected to the BMS control system. By feeding back the temperature of the battery cell 20 and the air temperature collected to the BMS control system, the BMS control system can more comprehensively feedback the temperature inside the entire battery device through comprehensive calculation. Compared with the method of simply collecting the temperature of the battery cell 20, this method of combining the temperature of the battery cell 20 and the air temperature has higher accuracy and higher safety.

[0104] In the technical solution of the embodiment of the present application, through the arrangement of the first temperature acquisition component 40 and the second temperature acquisition component 50 inside the battery device 100, the first temperature acquisition component 40 can directly acquire the temperature information of the air inside the box, and the second temperature acquisition component 50 can acquire the temperature information of the battery cell 20. Under the combined action of the first temperature acquisition component 40 and the second temperature acquisition component 50, the temperature information of the battery cell 20 of the battery device and the air inside the box can be monitored, increasing the monitoring channels for the thermal runaway risk of the battery device 100, being able to more comprehensively feedback the temperature information inside the battery device 100, reducing the risk of thermal runaway monitoring failure caused by the failure of single temperature monitoring, being able to more accurately identify the thermal runaway risk of the battery device 100, and improving the safety of the battery device 100. The first temperature acquisition component 42 is arranged on the first bracket 41. The first bracket 41 can function to carry and fix the first temperature acquisition component 42, improving the installation stability of the first temperature acquisition component 42. The first temperature acquisition component 42 is electrically connected to the circuit board 30. The circuit board 30 can supply power to the first temperature acquisition component 42 to acquire the temperature information of the air above the battery cell group 24.

[0105] Moreover, compared with the traditional method of only monitoring the temperature of the single battery cell 20, there is a certain difference in the temperature between the top cover of the battery cell 20 and the middle part of the battery cell 20, and generally the heat transfer method through the heat conducting pad 53 is unstable. In the state where the heat conducting pad 53 falls off or peels off, there is a certain risk for this temperature. However, the second temperature acquisition component 50 in this solution can directly contact the air, can quickly sense the change in the air temperature inside the battery device 100, and the most direct monitoring method for the thermal runaway temperature is also by determining the air temperature inside the battery device 100. This method greatly improves the thermal safety of the battery device 100.

[0106] According to some embodiments of the present application, please refer to Figure 5 and Figure 6 , the first bracket 41 is an insulating part.

[0107] The first bracket 41 being an insulating part can be that the first bracket 41 is made of an insulating material; or, the first bracket 41 is made of a non-insulating material, and an insulating layer is provided on the surface of the first bracket 41. In the case where the first bracket 41 is made of an insulating material, the first bracket 41 can be made of an insulating material such as plastic or plastic. An insulating material refers to a material that can prevent the flow of electric current and is widely used in fields such as power transmission, electronic devices, insulating coatings, insulating pipes, and insulating boards. The main characteristics of insulating materials include high resistivity and the ability to withstand electric breakdown. Usually, the resistivity is in the range of 10^10 to 10^22 Ω·m.

[0108] By using the first bracket 41 as an insulating part, there is no risk of short circuit between the first temperature acquisition component 42 and the first bracket 41.

[0109] According to some embodiments of the present application, please refer to Figure 7 and Figure 8 , the second temperature acquisition component 50 includes a second bracket 51 and a second temperature acquisition component 52. The second bracket 51 is an insulating part, the second temperature acquisition component 52 is arranged on the second bracket 51, and the second temperature acquisition component 52 is electrically connected to the circuit board 30.

[0110] The second bracket 51 being an insulating part can be that the second bracket 51 is made of an insulating material; or, the second bracket 51 is made of a non-insulating material, and an insulating layer is provided on the surface of the second bracket 51.

[0111] The second temperature collection component 52 is disposed on the second bracket 51, and the second bracket 51 can bear and fix the second temperature collection component 52, thereby improving the installation stability of the second temperature collection component 52. The second bracket 51 is used as an insulating member, so that the second temperature collection component 52 will not have the risk of short circuit with the second bracket 51. The second temperature collection component 52 is electrically connected to the circuit board 30, and the circuit board 30 can supply power to the second temperature collection component 52, thereby realizing the collection of temperature information of the battery cell 20.

[0112] According to some embodiments of the present application, along the second direction Y, the distance between the first temperature collection component 42 and the battery cell group 24 is greater than the distance between the second temperature collection component 52 and the battery cell group 24 .

[0113] The distance between the first temperature collection component 42 and the battery cell group 24 is greater than the distance between the second temperature collection component 52 and the battery cell group 24. The first temperature collection component 42 is farther from the battery cell group 24 than the second temperature collection component 52, that is, the first temperature collection component 42 is farther from the battery cell group 24. When the first temperature collection component 42 collects the temperature information of the air in the box 10, the first temperature collection component 42 is not easily affected by the thermal radiation of the battery cell group 24 itself. The first temperature collection component 42 can more accurately collect the temperature information of the air above the battery cell group 24.

[0114] According to some embodiments of this application, please combine Figure 5 , Figure 6 and Figure 9 The first bracket 41 includes a first body 411 and a boss 412 . Along the second direction Y, the boss 412 is disposed on a side of the first body 411 away from the battery cell group 24 , and the first temperature collection component 42 is disposed on the boss 412 .

[0115] The first body 411 refers to the body structure of the first bracket 41, and the boss 412 is protruding from the first body 411 along the second direction Y. The boss 412 and the first body 411 can be integrally formed, or they can be connected to each other for a second time. In this embodiment, the boss 412 and the first body 411 are formed once.

[0116] The first bracket 41 includes a first body 411 and a boss 412. The first temperature acquisition component 42 is disposed on the boss 412. The boss 412 protrudes from the first body 411. The boss 412 can not only provide the functions of carrying and positioning for the first temperature acquisition component 42, but also suspend the first temperature acquisition component 42 on the first bracket 41. The first temperature acquisition component 42 can be further away from the battery cell group 24, and the first temperature acquisition component 42 is less likely to be affected by the temperature of the battery cell 20, and can more accurately acquire the temperature information of the air in the box body 10.

[0117] According to some embodiments of the present application, please refer to Figure 5 and Figure 6 , the circuit board 30 includes a main body portion 31 and a first cantilever portion 32. One end of the first cantilever portion 32 is connected to the main body portion 31, and the other end is electrically connected to the first temperature acquisition component 42.

[0118] The main body portion 31 refers to the main structure of the circuit board 30, and the first cantilever portion 32 refers to the cantilever structure on one side of the upper edge of the circuit board 30. One end of the first cantilever portion 32 is connected to the main body portion 31, and the other end of the first cantilever portion 32 is a free end. The free end of the first cantilever portion 32 is electrically connected to the first temperature acquisition component 42 on the boss 412.

[0119] The elastic modulus of the boss 412 is greater than the elastic modulus of the first cantilever portion 32, and the boss 412 can provide sufficient support for the first cantilever portion 32.

[0120] It can be understood that the first cantilever portion 32 is a cantilever structure, and the first cantilever portion 32 itself can be bent downward or upward relative to the main body portion 31, and even can be partially wrinkled to absorb the installation error between the first temperature acquisition component 42 and the circuit board 30, with stronger flexibility.

[0121] Through the arrangement of the first cantilever portion 32 on the circuit board 30, the circuit board 30 can be electrically connected to the first temperature acquisition component 42 through the first cantilever portion 32. The first cantilever portion 32 itself can be locally deformed relative to the main body portion 31, and can absorb the installation error between the first temperature acquisition component 42 and the circuit board 30, which is more conducive to the precise connection between the circuit board 30 and the first temperature acquisition component 42.

[0122] According to some embodiments of the present application, along the second direction Y, the boss 412 protrudes from the side of the main body portion 31 facing away from the battery cell group 24.

[0123] The boss 412 protrudes from the side of the main body portion 31 facing away from the battery cell group 24, that is, the height of the side of the boss 412 facing away from the battery cell group 24 is higher than the height of the side of the main body portion 31 facing away from the battery cell group 24.

[0124] The boss 412 protrudes from the side of the main body 31 facing away from the battery cell group 24, that is, the height of the boss 412 is higher than the height of the main body 31 of the circuit board 30. In this way, the installation height of the first temperature acquisition component 42 is higher, the distance between the first temperature acquisition component 42 and the battery cell group 24 is farther, the first temperature acquisition component 42 is less likely to be affected by the temperature thermal radiation of the battery cell group 24, and the first temperature acquisition component 42 can more accurately acquire the temperature information of the air above the battery cell group 24.

[0125] According to some embodiments of the present application, please refer to Figure 6 , the first cantilever portion 32 is a bent structure.

[0126] The bent structure means that the first cantilever portion 32 can be bent and deformed relative to the main body portion 31. The first cantilever portion 32 can be bent upward or downward relative to the main body portion 31, so that the length and / or height of the first cantilever portion 32 changes adaptively.

[0127] Adopting the first cantilever portion 32 as a bent structure, the first cantilever portion 32 can be bent and deformed. On the one hand, the first cantilever portion 32 can absorb the installation error between the first temperature acquisition component 42 and the first cantilever portion 32. On the other hand, when the circuit board 30 and the first temperature acquisition component 42 move slightly relative to each other, the first cantilever portion 32 can still maintain the electrical connection between the circuit board 30 and the first temperature acquisition component 42 by virtue of its own deformation, and the stability is higher.

[0128] According to some embodiments of the present application, please combine Figure 5 、 Figure 6 and Figure 10 , the first temperature acquisition assembly 40 further includes a first reinforcing plate 43. The first reinforcing plate 43 is an insulating part. The first reinforcing plate 43 is arranged on the boss 412. The first reinforcing plate 43 has a first receiving groove 431, and the first temperature acquisition component 42 is arranged in the first receiving groove 431.

[0129] The first reinforcing plate 43 is a component arranged on the first bracket 41 to provide a packaging and protection function for the first temperature acquisition component 42. The first reinforcing plate 43 can enhance the stability of the first temperature acquisition component 42 on the first bracket 41. The first reinforcing plate 43 is an insulating part, that is, the material of the first reinforcing plate 43 can be an insulating material. The first receiving groove 431 of the first reinforcing plate 43 can be used for installing the first temperature acquisition component 42.

[0130] Through the provision of the first reinforcing plate 43, the first temperature acquisition component 42 is disposed in the first accommodation groove 431 of the first reinforcing plate 43. On the one hand, the first reinforcing plate 43 can perform the function of insulating and encapsulating the first temperature acquisition component 42, so that the first temperature acquisition component 42 is not exposed to the external environment, protecting the first temperature acquisition component 42 and reducing the short-circuit risk. On the other hand, the first temperature acquisition component 42 is mounted on the first bracket 41 through the first reinforcing plate 43. Compared with the first temperature acquisition component 42 being mounted on the first bracket 41 by itself, the connection between the first reinforcing plate 43 and the first bracket 41 can increase the mounting stability of the first temperature acquisition component 42.

[0131] According to some embodiments of the present application, a part of the first cantilever portion 32 is located between the first reinforcing plate 43 and the boss 412.

[0132] A part of the first cantilever portion 32 being located between the first reinforcing plate 43 and the boss 412 means that a part of the first cantilever portion 32 is located outside the boss 412 and the first reinforcing plate 43, and a part is located between the top surface of the first reinforcing plate 43 and the boss 412. That is, along the second direction Y, the first cantilever portion 32 partially overlaps with the first reinforcing plate 43, and the first cantilever portion 32 partially overlaps with the boss 412.

[0133] In order to increase the connection stability of the first cantilever portion 32, the area where the bottom surface of the first cantilever portion 32 contacts the boss 412 can be adhered to fix the first cantilever portion 32 on the boss 412 by means of adhesive. The first temperature acquisition component 42 in the first reinforcing plate 43 is connected to the side of the first cantilever portion 32 away from the boss 412 to achieve the electrical connection between the first temperature acquisition component 42 and the circuit board 30.

[0134] With a part of the first cantilever portion 32 located between the first reinforcing plate 43 and the boss 412, the first cantilever portion 32 has an overlapping part with the boss 412 and the first temperature acquisition component 42. The boss 412 provides a supporting and positioning function for the first cantilever portion 32. Compared with the connection between the first temperature acquisition component 42 and the first cantilever portion 32 in the area outside the boss 412, the mounting stability of the first cantilever portion 32 is higher, and the first cantilever portion 32 is less likely to be separated from the first temperature acquisition component 42.

[0135] According to some embodiments of the present application, please refer to Figure 5 and Figure 6 , along the second direction Y, the first accommodation groove 431 penetrates through the first reinforcing plate 43. The first temperature acquisition assembly 40 further includes a first seal 44, and the first seal 44 closes one end of the first accommodation groove 431 facing away from the boss 412.

[0136] The first receiving groove 431 penetrates through the first reinforcing plate 43, which means that the first receiving groove 431 penetrates through both ends of the first reinforcing plate 43 along the second direction Y, and one end of the first receiving groove 431 close to the boss 412 penetrates, facilitating the electrical connection between the first temperature acquisition component 42 and the first cantilever portion 32. The first seal 44 seals one end of the first receiving groove 431 facing away from the boss 412, which means that the first seal 44 is arranged at one end of the first receiving groove 431 facing away from the boss 412, and the first seal 44 can seal one end of the first receiving groove 431 facing away from the boss 412.

[0137] The first seal 44 can be a seal cover structure, and a ventilation hole can be formed in the first seal 44. The ventilation hole allows air in the battery device to enter the first receiving groove 431, and the first temperature acquisition component 42 can more directly collect the temperature information of the air.

[0138] Certainly, the first seal 44 can also be an adhesive structure, and the first receiving groove 431 can be sealed by applying glue at the upper end of the first receiving groove 431.

[0139] The first seal 44 seals one end of the first receiving groove 431 facing away from the boss 412, and the first seal 44 can play a role in dust prevention, reducing the risk that the accuracy of the first temperature acquisition component 42 is affected due to dust entering the first receiving groove 431 and adhering to the surface of the first temperature acquisition component 42.

[0140] According to some embodiments of the present application, please refer to Figure 5 and Figure 6 , the first bracket 41 further includes a first hot riveting post 413. The first hot riveting post 413 is arranged on the boss 412. The first reinforcing plate 43 has a first through hole for the first hot riveting post 413 to pass through, and the first hot riveting post 413 is used to thermally rivet and fix the first reinforcing plate 43 to the boss 412.

[0141] The first hot riveting post 413 is a hot riveting structure arranged on the boss 412. The upper end of the first hot riveting post 413 passes through the first through hole of the first reinforcing plate 43 and extends out of the first reinforcing plate 43. By heating the first hot riveting post 413, the first hot riveting post 413 melts and deforms, and then the first reinforcing plate 43 is thermally riveted and fixed to the boss 412.

[0142] The hot riveting process changes and even melts the connection part of two metals by raising the temperature. Hot riveting is not welding, that is, the connection part of two metals is changed and even melted together by raising the temperature.

[0143] The number of the first hot riveting posts 413 is one or more. In this embodiment, the number of the first hot riveting posts 413 is two. The two first hot riveting posts 413 are spaced apart on the boss 412, and the two first hot riveting posts 413 cooperate together to achieve the hot riveting and fixing of the first reinforcing plate 43 and the boss 412.

[0144] By providing the first hot riveting posts 413 on the boss 412, the first hot riveting posts 413 can hot-rivet and fix the first reinforcing plate 43 to the boss 412. The installation stability of the first reinforcing plate 43 on the boss 412 is higher, thereby improving the installation stability of the first temperature acquisition component 42, and reducing the risk of poor contact between the first temperature acquisition component 42 and the first cantilever portion 32 of the circuit board 30 due to the movement or even loosening of the first reinforcing plate 43 and the boss 412.

[0145] According to some embodiments of the present application, please refer to Figure 5 , Figure 6 and Figure 9 , the first bracket 41 further includes a buckle portion 414. One end of the buckle portion 414 is connected to the first body 411, and the other end is clamped on the side of the first reinforcing plate 43 away from the boss 412.

[0146] The buckle portion 414 refers to the buckle structure on the first bracket 41, and the buckle portion 414 can be bent and deformed relative to the first body. One end of the buckle portion 414 away from the first body 411 abuts against the side of the first reinforcing plate 43 away from the boss 412, providing a limiting effect on the first reinforcing plate 43 and preventing the first reinforcing plate 43 from moving relative to the boss 412.

[0147] By providing the buckle portion 414 on the first bracket 41, the upper end of the buckle portion 414 is clamped on the side of the first reinforcing plate 43 away from the boss 412. The buckle portion 414 can play a role of abutting and limiting on the first reinforcing plate 43. Under the action of the first hot riveting posts 413 fixing the first reinforcing plate 43, the buckle portion 414 can further improve the installation stability between the first reinforcing plate 43 and the boss 412, and further reduce the risk of poor contact between the first temperature acquisition component 42 and the circuit board 30 due to the movement or even loosening of the first reinforcing plate 43.

[0148] According to some embodiments of the present application, please refer to Figure 2 and Figure 4, the battery cell 20 includes electrode terminals 23; the battery device further includes a plurality of first bus bars 61 and a plurality of second bus bars 62. The first bus bar 61 is connected to the electrode terminal 23, and the second bus bar 62 is connected to the electrode terminal 23; the plurality of first bus bars 61 are arranged in a row along the first direction X and are located on the first side of the circuit board 30, and the plurality of second bus bars 62 are arranged in a row along the first direction X and are located on the second side of the circuit board 30. The first side and the second side are spaced apart along the third direction Z, and the third direction Z, the second direction Y, and the first direction X are perpendicular to each other in pairs.

[0149] The plurality of first bus bars 61 are arranged in a row along the first direction X and are located on the first side of the circuit board 30, and the plurality of second bus bars 62 are arranged in a row along the first direction X and are located on the second side of the circuit board 30. That is, the plurality of first bus bars 61 and the plurality of second bus bars 62 are respectively located on both sides of the circuit board 30 in the third direction Z. The third direction Z, the second direction Y, and the first direction X are perpendicular to each other in pairs, which means that any two of the third direction Z, the second direction Y, and the first direction X are perpendicular to each other.

[0150] The first bus bar 61 electrically connects the electrode terminal 23 on one side of the battery cell 20 in the third direction Z, and the second bus bar 62 electrically connects the electrode terminal 23 on the other side of the battery cell 20 in the third direction Z. The first bus bar 61 and the second bus bar 62 cooperate together to complete the electrical connection of the electrode terminals 23 of the plurality of battery cells 20 in the battery cell group 24.

[0151] According to some embodiments of the present application, the battery device further includes a separator 70. Along the second direction Y, at least a part of the separator 70 is disposed between the battery cell group 24 and the circuit board 30.

[0152] The separator 70 can be a plastic suction board, which has excellent impact resistance, tensile strength, bending strength, and compressive strength.

[0153] The separator 70 is disposed between the battery cell group 24 and the circuit board 30. The separator 70 can play a role in fixing and protecting the battery cell group 24, providing heat insulation and protection functions, and ensuring the reliability and safety of the battery device.

[0154] According to some embodiments of the present application, please refer to Figure 6 and Figure 9 , the first bracket 41 further includes a first extension portion 415 and a second extension portion 416. The first extension portion 415 and the second extension portion 416 are respectively disposed at both ends of the first body 411 along the third direction Z; along the second direction Y, the first extension portion 415 is disposed between the first bus bar 61 and the separator 70, and the second extension portion 416 is disposed between the second bus bar 62 and the separator 70.

[0155] The first extension part 415 is arranged between the first bus bar 61 and the partition board 70, which means that along the second direction Y, the first extension part 415 at least partially overlaps with the first bus bar 61 and the partition board 70. The second extension part 416 is arranged between the second bus bar 62 and the partition board 70, and along the second direction Y, the second extension part 416 at least partially overlaps with the second bus bar 62 and the partition board 70.

[0156] Please refer to Figure 5 , a plurality of third hot riveting posts 71 are arranged on the partition board 70, and the number of the third hot riveting posts 71 is plural. A part of the plurality of third hot riveting posts 71 is used to thermally rivet and fix the first bus bar 61 to the partition board 70, and a part of the plurality of third hot riveting posts 71 is used to thermally rivet and fix the second bus bar 62 to the partition board 70. Under the action of the third hot riveting posts 71, the first bus bar 61 and the partition board 70 respectively play a role of pressing and positioning on the first extension part 415, and the second bus bar 62 and the partition board 70 can play a role of pressing and positioning on the second extension part 416.

[0157] Through the arrangement of the first extension part 415 and the second extension part 416 on the first bracket 41, the first extension part 415 is arranged between the first bus bar 61 and the partition board 70, and the second extension part 416 is arranged between the second bus bar 62 and the partition board 70. By using the first bus bar 61 and the partition board 70 to respectively play a role of pressing and positioning on the first extension part 415, and the second bus bar 62 and the partition board 70 can play a role of pressing and positioning on the second extension part 416, the pressing and fixing of both ends of the first bracket 41 in the third direction Z are realized. The installation of the first bracket 41 is convenient and fast, and there is no need to perform fixing operations such as riveting or bonding on the first bracket 41. And when the first temperature acquisition component 40 needs to be maintained and replaced later, the first bracket 41 can be quickly disassembled, and the first bracket 41 is convenient to install and disassemble.

[0158] According to some embodiments of the present application, please refer to Figure 9 , the battery cell 20 includes a pressure relief mechanism, and the first body 411 has a first relief hole 4111 for avoiding the pressure relief mechanism.

[0159] The pressure relief mechanism is also the explosion-proof valve of the battery cell 20. The size and shape of the first relief hole 4111 are adapted to the pressure relief mechanism.

[0160] Through the arrangement of the first relief hole 4111 on the first body 411, the first relief hole 4111 can play a role of avoiding the pressure relief mechanism of the battery cell 20 and will not affect the normal operation of the pressure relief mechanism.

[0161] According to some embodiments of the present application, please combine Figure 8 and Figure 11, the second bracket 51 has a first window 514, and the second temperature acquisition component 52 is installed in the first window 514; the second temperature acquisition assembly 50 further includes a heat-conducting pad 53, and the second temperature acquisition component 52 is thermally connected to the battery cell 20 through the heat-conducting pad 53.

[0162] The first window 514 refers to a through-hole structure formed in the second bracket 51. The second temperature acquisition component 52 is disposed at the first window 514. The first window 514 allows the heat-conducting pad 53 to be disposed therethrough, realizing the thermal connection between the second temperature acquisition component 52 and the battery cell 20. The size of the first window 514 can be adapted to the size of the heat-conducting pad 53.

[0163] The heat-conducting pad 53 refers to a heat-conducting component disposed between the second temperature acquisition component 52 and the first wall of the battery cell 20. The heat-conducting pad 53 has good heat-conducting performance. The heat-conducting pad 53 can transfer the temperature of the battery cell 20 to the second temperature acquisition component 52, which is beneficial for the second temperature acquisition component 52 to accurately acquire the temperature information of the battery cell 20.

[0164] Certainly, the second temperature acquisition assembly 50 may further include a second reinforcing plate 54. The second reinforcing plate 54 is an insulating member. The second reinforcing plate 54 has a second receiving groove. The second temperature acquisition component 52 is disposed in the second receiving groove. The second temperature acquisition component 52 is thermally connected between the first wall of the battery cell 20 through the heat-conducting pad 53.

[0165] In addition, the second bracket 51 may include a second body 511, a third extension 512, and a fourth extension 513. A second thermal riveting post 515 is provided on the second body 511. The second thermal riveting post 515 thermally rivets and fixes the second reinforcing plate 54 to the second bracket 51. The third extension 512 and the fourth extension 513 are respectively disposed at two ends of the second body 511 in the third direction Z. Along the second direction Y, the third extension 512 is disposed between the first bus bar 61 and the separator 70, and the fourth extension 513 is disposed between the second bus bar 62 and the separator 70. A second avoidance hole 516 is provided on the second body 511. The second avoidance hole 516 is used to avoid the pressure relief structure.

[0166] Through the setting of the first window 514 on the second bracket 51, the first window 514 can play a role in avoiding the heat-conducting pad 53. The second temperature acquisition component 52 is thermally connected to the battery cell 20 through the heat-conducting pad 53. The heat-conducting pad 53 can play a role in transferring heat, so that the second temperature acquisition component 52 can acquire the temperature information of the battery cell 20, reduce heat loss, and improve the accuracy of the second temperature acquisition component 52 in acquiring the temperature of the battery cell 20.

[0167] In some embodiments, please refer to Figures 1 to 11, the battery device 100 includes a box body 10, a battery cell group 24, a circuit board 30, a first temperature acquisition component 40, and a second temperature acquisition component 50. The battery cell group 24 is disposed within the box body. The battery cell group 24 includes a plurality of battery cells 20 arranged along a first direction X. The circuit board 30 is disposed on one side of the battery cell group 24 along a second direction Y, and the second direction Y is perpendicular to the first direction X. The first temperature acquisition component 40 is electrically connected to the circuit board 30, and the first temperature acquisition component 40 is configured to acquire temperature information of the air within the box body 10. The second temperature acquisition component 50 is electrically connected to the circuit board 30, and the second temperature acquisition component 50 is configured to acquire temperature information of the battery cells 20. The first temperature acquisition component 40 includes a first bracket 41 and a first temperature acquisition part 42. The first bracket 41 is an insulating member, and the first temperature acquisition part 42 is disposed on the first bracket 41. The first temperature acquisition part 42 is electrically connected to the circuit board 30. The second temperature acquisition component 50 includes a second bracket 51 and a second temperature acquisition part 52. The second bracket 51 is an insulating member, and the second temperature acquisition part 52 is disposed on the second bracket 51. The second temperature acquisition part 52 is electrically connected to the circuit board 30.

[0168] By setting the first temperature acquisition component 40 and the second temperature acquisition component 50 in the battery device 100, the first temperature acquisition component 40 can directly acquire the temperature information of the air in the box 10, and the second temperature acquisition component 50 can acquire the temperature information of the battery cell 20. Under the cooperation of the first temperature acquisition component 40 and the second temperature acquisition component 50, the temperature information of the battery cell 20 and the air in the box of the battery device can be monitored, which increases the way to monitor the thermal runaway risk of the battery device, can more comprehensively feedback the internal temperature information of the battery device, can reduce the risk of thermal runaway monitoring failure caused by the failure of a single temperature monitoring, can more accurately identify the thermal runaway risk of the battery device, and improve the safety of the battery device. The first temperature acquisition component 42 is arranged on the first bracket 41, and the first bracket 41 can bear and fix the first temperature acquisition component 42, thereby improving the installation stability of the first temperature acquisition component 42. The first bracket 41 is used as an insulating member, and the first temperature collection component 42 will not have the risk of short circuit with the first bracket 41. The first temperature collection component 42 is electrically connected to the circuit board 30, and the circuit board 30 can supply power to the first temperature collection component 42 to collect the air temperature information above the battery cell group 24. The second temperature collection component 52 is arranged on the second bracket 51, and the second bracket 51 can bear and fix the second temperature collection component 52, thereby improving the installation stability of the second temperature collection component 52. The second bracket 51 is used as an insulating member, and the second temperature collection component 52 will not have the risk of short circuit with the second bracket 51. The second temperature collection component 52 is electrically connected to the circuit board 30, and the circuit board 30 can supply power to the second temperature collection component 52 to collect the temperature information of the battery cell 20.

[0169] In some embodiments, along the second direction Y, the distance between the first temperature collection component 42 and the battery cell group 24 is greater than the distance between the second temperature collection component 52 and the battery cell group 24. The first bracket 41 includes a first body 411 and a boss 412. Along the second direction Y, the boss 412 is disposed on a side of the first body 411 away from the battery cell group 24, and the first temperature collection component 42 is disposed on the boss 412. The circuit board 30 includes a main body 31 and a first cantilever portion 32. One end of the first cantilever portion 32 is connected to the main body 31, and the other end is electrically connected to the first temperature collection component 42. Along the second direction Y, the boss 412 protrudes from the side of the main body 31 away from the battery cell group 24. The first cantilever portion 32 is a bent structure.

[0170] The distance between the first temperature acquisition component 42 and the battery cell group 24 is greater than the distance between the second temperature acquisition component 52 and the battery cell group 24. The first temperature acquisition component 42 is farther from the battery cell group 24 relative to the second temperature acquisition component 52, that is, the first temperature acquisition component 42 is farther from the battery cell group 24. When the first temperature acquisition component 42 acquires the temperature information of the air in the acquisition box, the first temperature acquisition component 42 is not easily affected by the thermal radiation of the temperature of the battery cell group 24 itself, and the first temperature acquisition component 42 can more accurately acquire the temperature information of the air above the battery cell group 24. The first bracket 41 includes a first body 411 and a boss 412. The first temperature acquisition component 42 is disposed on the boss 412. The boss 412 protrudes from the first body 411. The boss 412 can not only provide the functions of carrying and positioning for the first temperature acquisition component 42, but also suspend the first temperature acquisition component 42 on the first bracket 41. The first temperature acquisition component 42 can be farther away from the battery cell group 24, and the first temperature acquisition component 42 is less likely to be affected by the temperature of the battery cell 20, and can more accurately acquire the temperature information of the air in the box. The circuit board 30 can be electrically connected to the first temperature acquisition component 42 through the first cantilever portion 32. The first cantilever portion 32 can be locally deformed relative to the main body portion 31 itself, and can absorb the installation error between the first temperature acquisition component 42 and the circuit board 30, which is more conducive to the precise connection between the circuit board 30 and the first temperature acquisition component 42. The boss 412 protrudes from the side of the main body portion 31 facing away from the battery cell group 24, that is, the height of the boss 412 is higher than the height of the main body portion 31 of the circuit board 30. In this way, the installation height of the first temperature acquisition component 42 is higher, the distance between the first temperature acquisition component 42 and the battery cell group 24 is farther, the first temperature acquisition component 42 is less likely to be affected by the temperature thermal radiation of the battery cell group 24, and the first temperature acquisition component 42 can more accurately acquire the temperature information of the air above the battery cell group 24. The first cantilever portion 32 is adopted as a bent structure, and the first cantilever portion 32 can be bent and deformed. On the one hand, the first cantilever portion 32 can absorb the installation error between the first temperature acquisition component 42 and the first cantilever portion 32. On the other hand, when the circuit board 30 and the first temperature acquisition component 42 have a slight relative movement, the first cantilever portion 32 can still maintain the electrical connection between the circuit board 30 and the first temperature acquisition component 42 by virtue of the deformation of the first cantilever portion 32 itself, and the stability is higher.

[0171] In some embodiments, the first temperature acquisition component 40 further includes a first reinforcing plate 43. The first reinforcing plate 43 is an insulating member. The first reinforcing plate 43 is disposed on the boss 412. The first reinforcing plate 43 has a first receiving groove 431. The first temperature acquisition component 42 is disposed in the first receiving groove 431. A part of the first cantilever portion 32 is located between the first reinforcing plate 43 and the boss 412. Along the second direction Y, the first receiving groove 431 penetrates through the first reinforcing plate 43. The first temperature acquisition component 40 further includes a first seal 44. The first seal 44 closes one end of the first receiving groove 431 facing away from the boss 412. The first bracket 41 further includes a first hot riveting post 413. The first hot riveting post 413 is disposed on the boss 412. The first reinforcing plate 43 has a first through hole for the first hot riveting post 413 to pass through. The first hot riveting post 413 is used to thermally rivet and fix the first reinforcing plate 43 to the boss 412. The first bracket 41 further includes a buckle portion 414. One end of the buckle portion 414 is connected to the first body 411, and the other end is clamped on the side of the first reinforcing plate 43 facing away from the boss 412.

[0172] The first temperature acquisition component 42 is disposed in the first accommodation groove 431 of the first reinforcing plate 43. On the one hand, the first reinforcing plate 43 can perform the function of insulating and encapsulating the first temperature acquisition component 42, so that the first temperature acquisition component 42 is not exposed to the external environment, which plays a protective role for the first temperature acquisition component 42 and also reduces the risk of short circuit. On the other hand, the first temperature acquisition component 42 is mounted on the first bracket 41 through the first reinforcing plate 43. Compared with the first temperature acquisition component 42 being directly mounted on the first bracket 41, the connection between the first reinforcing plate 43 and the first bracket 41 can increase the mounting stability of the first temperature acquisition component 42. The first seal 44 closes one end of the first accommodation groove 431 facing away from the boss 412. The first seal 44 can play a role in dust prevention, reducing the risk that the accuracy of the first temperature acquisition component 42 is affected due to dust entering the first accommodation groove 431 and adhering to the surface of the first temperature acquisition component 42. By providing a first hot riveting post 413 on the boss 412, the first hot riveting post 413 can thermally rivet and fix the first reinforcing plate 43 to the boss 412, and the mounting stability of the first reinforcing plate 43 on the boss 412 is higher, thereby improving the mounting stability of the first temperature acquisition component 42 and reducing the risk of poor contact between the first temperature acquisition component 42 and the first cantilever portion 32 of the circuit board 30 due to the movement or loosening of the first reinforcing plate 43 and the boss 412. The upper end of the buckle portion 414 is clamped on the side of the first reinforcing plate 43 facing away from the boss 412. The buckle portion 414 can play a role in resisting and limiting the first reinforcing plate 43. Under the action of the first hot riveting post 413 fixing the first reinforcing plate 43, the buckle portion 414 can further improve the mounting stability between the first reinforcing plate 43 and the boss 412, and further reduce the risk of poor contact between the first temperature acquisition component 42 and the circuit board 30 due to the movement or loosening of the first reinforcing plate 43.

[0173] In some embodiments, the battery cell 20 includes electrode terminals 23; the battery device further includes a plurality of first busbars 61 and a plurality of second busbars 62, the first busbars 61 are connected to the electrode terminals 23, and the second busbars 62 are connected to the electrode terminals 23; the plurality of first busbars 61 are arranged in a row along the first direction X and are located on the first side of the circuit board 30, the plurality of second busbars 62 are arranged in a row along the first direction X and are located on the second side of the circuit board 30, the first side and the second side are spaced apart along the third direction Z, and the third direction Z, the second direction Y, and the first direction X are perpendicular to each other in pairs. The battery device further includes a separator 70, and along the second direction Y, at least a part of the separator 70 is disposed between the battery cell group 24 and the circuit board 30. The first bracket 41 further includes a first extension portion 415 and a second extension portion 416, the first extension portion 415 and the second extension portion 416 are respectively disposed at two ends of the first body 411 along the third direction Z; along the second direction Y, the first extension portion 415 is disposed between the first busbar 61 and the separator 70, and the second extension portion 416 is disposed between the second busbar 62 and the separator 70.

[0174] The separator 70 is disposed between the battery cell group 24 and the circuit board 30. The separator 70 can play a role in fixing and protecting the battery cell group 24, provide heat insulation and protection functions, and ensure the reliability and safety of the battery device. Through the arrangement of the first extension portion 415 and the second extension portion 416 on the first bracket 41, the first extension portion 415 is disposed between the first busbar 61 and the separator 70, and the second extension portion 416 is disposed between the second busbar 62 and the separator 70. The first busbar 61 and the separator 70 respectively play a function of pressing and positioning the first extension portion 415, and the second busbar 62 and the separator 70 can play a function of pressing and positioning the second extension portion 416, so as to realize the pressing and fixing of the two ends of the first bracket 41 along the third direction Z. The installation of the first bracket 41 is convenient and fast, and there is no need to perform fixing operations such as riveting or bonding on the first bracket 41. And when the first temperature acquisition component 40 needs to be maintained and replaced subsequently, the first bracket 41 can be quickly disassembled, and the first bracket 41 is convenient to install and disassemble.

[0175] In some embodiments, the second bracket 51 has a first window 514, and the second temperature acquisition component 52 is installed in the first window 514; the second temperature acquisition assembly 50 further includes a heat conducting pad 53, and the second temperature acquisition component 52 is thermally connected to the battery cell 20 through the heat conducting pad 53. The first window 514 can play a role in avoiding the heat conducting pad 53. The second temperature acquisition component 52 is thermally connected to the battery cell 20 through the heat conducting pad 53, and the heat conducting pad 53 can play a function of transferring heat, so as to enable the second temperature acquisition component 52 to collect the temperature information of the battery cell 20, reduce the loss of heat, and improve the accuracy of the second temperature acquisition component 52 in collecting the temperature of the battery cell 20.

[0176] Although the present application has been described with reference to the preferred embodiments, various modifications can be made thereto and components thereof can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; A battery cell group is disposed in the box, and the battery cell group includes a plurality of battery cells arranged along a first direction; A circuit board is arranged on one side of the battery cell group along a second direction, wherein the second direction is perpendicular to the first direction; A first temperature collection component, electrically connected to the circuit board, and used to collect temperature information of the air in the box; A second temperature collection component, electrically connected to the circuit board, and used to collect temperature information of the battery cell; The first temperature collection component includes a first bracket and a first temperature collection component. The first temperature collection component is arranged on the first bracket, and the first temperature collection component is electrically connected to the circuit board.

2. The battery device according to claim 1, characterized in that, The first bracket is an insulating member.

3. The battery device according to claim 1, characterized in that, The second temperature collection component includes a second bracket and a second temperature collection component, the second bracket is an insulating member, the second temperature collection component is arranged on the second bracket, and the second temperature collection component is electrically connected to the circuit board.

4. The battery device according to claim 3, wherein Along the second direction, a distance between the first temperature collecting component and the battery cell group is greater than a distance between the second temperature collecting component and the battery cell group.

5. The battery device according to claim 1, characterized in that, The first bracket includes a first body and a boss. Along the second direction, the boss is arranged on a side of the first body away from the battery cell group, and the first temperature collection component is arranged on the boss.

6. The battery device according to claim 5, characterized in that, The circuit board includes a main body and a first cantilever part, one end of the first cantilever part is connected to the main body, and the other end of the first cantilever part is electrically connected to the first temperature collecting component.

7. The battery device according to claim 6, characterized in that, Along the second direction, the boss protrudes from a side of the main body away from the battery cell group.

8. The battery device according to claim 6, characterized in that, The first cantilever portion is a bent structure.

9. The battery device according to claim 6, wherein, The first temperature collection component also includes a first reinforcement plate, which is an insulating member. The first reinforcement plate is disposed on the boss and has a first receiving groove. The first temperature collection component is disposed in the first receiving groove.

10. The battery device according to claim 9, wherein, A portion of the first cantilever portion is located between the first reinforcing plate and the boss.

11. The battery device according to claim 9, characterized in that, Along the second direction, the first receiving groove penetrates the first reinforcing plate, and the first temperature collection assembly further includes a first sealing member, which seals an end of the first receiving groove away from the boss.

12. The battery device according to claim 9, wherein The first bracket also includes a first heat rivet column, which is arranged on the boss. The first reinforcement plate has a first through hole for the first heat rivet column to pass through. The first heat rivet column is used to fix the first reinforcement plate to the boss by heat riveting.

13. The battery device according to claim 9, wherein, The first bracket further includes a buckle portion, one end of which is connected to the first body, and the other end of which is clamped on a side of the first reinforcing plate away from the boss.

14. The battery device according to claim 5, characterized in that, The battery cell includes an electrode terminal; The battery device further includes a plurality of first busbars and a plurality of second busbars, wherein the first busbars are connected to the electrode terminals, and the second busbars are connected to the electrode terminals; A plurality of the first bus bars are arranged in a row along the first direction and located on the first side of the circuit board, and a plurality of the second bus bars are arranged in a row along the first direction and located on the second side of the circuit board. The first side and the second side are spaced apart along a third direction, and the third direction, the second direction, and the first direction are perpendicular to each other in pairs.

15. The battery device according to claim 14, characterized in that, The battery device further includes a separator plate, and at least a part of the separator plate is disposed between the battery cell group and the circuit board along the second direction.

16. The battery device according to claim 15, wherein The first bracket further includes a first extension portion and a second extension portion, and the first extension portion and the second extension portion are respectively disposed at two ends of the first body along the third direction; Along the second direction, the first extension portion is disposed between the first bus bar and the separator plate, and the second extension portion is disposed between the second bus bar and the separator plate.

17. The battery device according to claim 5, characterized in that, The battery cell includes a pressure relief mechanism, and the first body has a first relief hole for avoiding the pressure relief mechanism.

18. The battery device according to claim 3, characterized in that, The second bracket has a first window, and the second temperature acquisition component is installed in the first window; The second temperature acquisition assembly further includes a heat conduction pad, and the second temperature acquisition component is thermally connected to the battery cell through the heat conduction pad.

19. An electrical device, characterized in that, Comprising the battery device according to any one of claims 1-18, the power consuming device is used to provide electrical energy.

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