Battery devices and power-consuming devices

Abstract

The embodiments of the present application provide a battery device and an electrical device. The battery device includes a housing, a battery cell group, a circuit board, a first temperature acquisition component, and a second temperature acquisition component. The battery cell group is disposed within the housing, and 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, the second direction being perpendicular to the first direction. The first temperature acquisition component is electrically connected to the circuit board, and is used to collect temperature information of the air within the housing. The second temperature acquisition component is electrically connected to the circuit board, and is used to collect 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. The technical solution provided by the present application can improve the safety of the battery device.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have experienced rapid development. Within the electric vehicle sector, 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 growing. As a core component of new energy vehicles, battery devices have high requirements for stability and reliability.

[0003] With the increasing popularity of electric vehicles and their increasing energy density, electric vehicle fires are becoming a common occurrence. A large proportion of these fires are caused by thermal runaway of the battery. Therefore, improving battery safety is a pressing technical challenge 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] This application is achieved through the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a battery device, which includes a housing, a battery cell group, a circuit board, a first temperature collection component, and a second temperature collection component. The battery cell group is arranged in the housing, and the battery cell group 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 collection component is electrically connected to the circuit board, and the first temperature collection component is used to collect temperature information of the air in the housing; the second temperature collection component is electrically connected to the circuit board, and the second temperature collection component is used to collect temperature information of the battery cells; 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.

[0007] In the technical solution of the embodiments of the present application, by disposing a first temperature acquisition component and a second temperature acquisition component within the battery device, the first temperature acquisition component can directly acquire temperature information of the air within the housing, while the second temperature acquisition component can acquire temperature information of the battery cells. The coordinated operation of the first and second temperature acquisition components allows for monitoring the temperature information of both the battery cells and the air within the housing. This increases the number of ways to monitor the risk of thermal runaway in the battery device, provides more comprehensive feedback on the internal temperature information of the battery device, reduces the risk of thermal runaway monitoring failure due to a single temperature monitoring failure, enables more accurate identification of thermal runaway risks in the battery device, and improves the safety of the battery device. The first temperature acquisition component is disposed on a first bracket, which supports and secures the first temperature acquisition component, improving its installation stability. The first temperature acquisition component is electrically connected to a circuit board, which provides power to the first temperature acquisition component, enabling the acquisition of air temperature information above the battery cell group.

[0008] According to some embodiments of the present application, the first bracket is an insulating member.

[0009] In the above solution, the first bracket is used as an insulating member, so there is no risk of short circuit between the first temperature collection component and the first bracket.

[0010] According to some embodiments of the present application, the second temperature collection assembly 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.

[0011] In the above solution, the second temperature collection component is mounted on a second bracket, which supports and secures the component, improving its installation stability. By using an insulating member in the second bracket, the second temperature collection component is protected from short circuits. The second temperature collection component is electrically connected to a circuit board, which provides power to the component, enabling the collection of battery cell temperature information.

[0012] According to some embodiments of the present application, along the second direction, the distance between the first temperature collecting component and the battery cell group is greater than the distance between the second temperature collecting component and the battery cell group.

[0013] 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 away from the battery cell group than the second temperature collection component, that is, the first temperature collection component is farther away 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.

[0014] 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.

[0015] In the above solution, 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 protruded 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 overhead 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 likely to be affected by the temperature of the battery cell, and can more accurately collect the temperature information of the air in the box.

[0016] 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 is electrically connected to the first temperature collection component.

[0017] In the above solution, by setting the first cantilever portion on the circuit board, the circuit board can be electrically connected to the first temperature collection component through the first cantilever portion. The first cantilever portion itself can be locally deformed relative to the main body portion, 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.

[0018] According to some embodiments of the present application, along the second direction, the boss protrudes from a side of the main body facing away from the battery cell group.

[0019] In the above solution, the boss protrudes 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. In this way, 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.

[0020] According to some embodiments of the present application, the first cantilever portion is a bent structure.

[0021] In the above solution, the first cantilever portion adopts a bending structure, and the first cantilever portion can be bent and deformed. On the one hand, the first cantilever portion can absorb the installation error between the first temperature collection component and the first cantilever portion. On the other hand, the first cantilever portion can utilize the deformation of the first cantilever portion itself to maintain the electrical connection between the circuit board and the first temperature collection component when there is a slight relative movement between the circuit board and the first temperature collection component, thereby improving stability.

[0022] According to some embodiments of the present application, the first temperature collection component also includes a first reinforcement plate, which is an insulating member. The first reinforcement plate is arranged on the boss and has a first accommodating groove. The first temperature collection component is arranged in the first accommodating groove.

[0023] In the above solution, the first temperature collection component is disposed in the first receiving groove of the first reinforcing plate through the provision of the first reinforcing plate. On the one hand, the first reinforcing plate can serve as an insulating and encapsulating function for the first temperature collection component, so that the first temperature collection component is not exposed to the external environment, thereby protecting the first temperature collection component and reducing the risk of short circuit. On the other hand, the first temperature collection component is mounted on the first bracket via the first reinforcing plate. Compared with the first temperature collection component being mounted on the first bracket itself, the connection between the first reinforcing plate and the first bracket can increase the installation stability of the first temperature collection component.

[0024] According to some embodiments of the present application, a portion of the first cantilever portion is located between the first reinforcing plate and the boss.

[0025] In the above solution, a portion of the first cantilever portion is located between the first reinforcement plate and the boss. The first cantilever portion, the boss, and the first temperature collection component have overlapping portions. The boss provides support and positioning for the first cantilever portion. Compared with a case where the first temperature collection component is connected to the first cantilever portion in an area outside the boss, the first cantilever portion has higher installation stability and is less likely to separate from the first temperature collection component.

[0026] According to some embodiments of the present application, along the second direction, the first receiving groove penetrates the first reinforcement plate, and the first temperature collection assembly further includes a first seal that seals an end of the first receiving groove away from the boss.

[0027] In the above solution, the first sealing member seals the end of the first receiving groove away from the boss, and the first sealing member can play a dust-proof role, reducing the risk of dust entering the first receiving groove and adhering to the surface of the first temperature collecting component, thereby affecting the collection accuracy of the first temperature collecting component.

[0028] According to some embodiments of the present application, the first bracket further includes a first thermal rivet stud, which is disposed on the boss. The first reinforcement plate has a first through hole for the first thermal rivet stud to pass through, and the first thermal rivet stud is used to thermally rivet the first reinforcement plate to the boss.

[0029] In the above solution, by arranging a first thermal rivet column on the boss, the first thermal rivet column can fix the first reinforcement plate to the boss by thermal 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.

[0030] 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.

[0031] In the above solution, a snap-fit ​​portion is provided on the first bracket, and the upper end of the snap-fit ​​portion is clamped on the side of the first reinforcement plate away from the boss. The snap-fit ​​portion can support and limit the first reinforcement plate. Under the action of the first hot rivet column fixing the first reinforcement plate, the snap-fit ​​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.

[0032] According to some embodiments of the present application, the 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 the first side of the circuit board, the plurality of second busbars are arranged in a row along the first direction and are 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] According to some embodiments of the present application, the first bracket also includes a first extension portion and a second extension portion, and the first extension portion and the second extension portion are respectively arranged at both ends of the first body along the third direction; along the second direction, the first extension portion is arranged between the first busbar and the isolation plate, and the second extension portion is arranged between the second busbar and the isolation plate.

[0037] In the above solution, by providing the first extension and the second extension on the first bracket, the first extension is provided between the first collector and the isolation plate, and the second extension is provided between the second collector and the isolation plate. The first collector and the isolation plate respectively press and position the first extension, while the second collector and the isolation plate press and position the second extension, thereby achieving pressure fixation of both ends of the first bracket in the third direction. The first bracket is quick and easy to install, and does not require riveting or bonding. Furthermore, if the first temperature acquisition assembly requires subsequent maintenance or replacement, the first bracket can be quickly disassembled, making the first bracket easy to assemble and disassemble.

[0038] According to some embodiments of the present application, the battery cell includes a pressure relief mechanism, and the first body has a first avoidance hole for avoiding the pressure relief mechanism.

[0039] In the above solution, by providing the first avoidance hole on the first body, the first avoidance hole can play a avoidance function for the pressure relief mechanism of the battery cell and will not affect the normal operation of the pressure relief mechanism.

[0040] According to some embodiments of the present application, the second bracket has a first window, and the second temperature collection component is installed in the first window; the second temperature collection assembly also includes a thermal pad, and the second temperature collection component is thermally connected to the battery cell through the thermal pad.

[0041] In the above solution, by setting the first window on the second bracket, the first window can play the role of avoiding the thermal pad. The second temperature collection component is thermally connected to the battery cell through the thermal pad. The thermal pad can transfer heat, thereby allowing the second temperature collection component to collect temperature information of the battery cell, reducing heat loss, and improving the accuracy of the second temperature collection component in collecting the battery cell temperature.

[0042] In a second aspect, an embodiment of the present application further provides an electrical device, which includes the battery device of any of the aforementioned embodiments, and is used to provide electrical energy.

[0043] The electrical device provided in the embodiment of the present application has the same technical effects as the battery device provided in any of the above embodiments, and thus will not be described in detail here.

[0044] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0047] Figure 2 A schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application;

[0048] Figure 3 Schematic diagram of an explosion of a battery cell in a battery device provided in some embodiments of the present application;

[0049] Figure 4 A schematic diagram of the structure of a temperature acquisition component, a circuit board, and a busbar in a battery device provided in some embodiments of the present application;

[0050] Figure 5 for Figure 4 A is an enlarged schematic diagram;

[0051] Figure 6 A partial cross-sectional view of the first temperature acquisition component in the battery device provided in some embodiments of the present application, in cooperation with the circuit board and the busbar;

[0052] Figure 7 for Figure 4 A magnified schematic diagram of middle B;

[0053] Figure 8 A partial cross-sectional view of the second temperature acquisition component in the battery device provided in some embodiments of the present application, in cooperation with the circuit board and the busbar;

[0054] Figure 9 A schematic structural diagram of a first bracket in a battery device provided in some embodiments of the present application;

[0055] Figure 10 A partially exploded schematic diagram of the cooperation between the first temperature acquisition component, the circuit board, and the busbar in the battery device provided in some embodiments of the present application;

[0056] Figure 11 This is a schematic structural diagram of the second bracket in the battery device provided in some embodiments of the present application.

[0057] Icons: 1000-vehicle; 100-battery device; 200-controller; 300-motor; 10-box; 11-first sub-box; 12-second sub-box; 20-battery cell; 21-housing; 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 assembly; 41-first bracket; 411-first body; 4111-first avoidance hole; 412-boss; 413-first thermal rivet; 414-buckle; 415-first Extension portion; 416-second extension portion; 42-first temperature collection component; 43-first reinforcement plate; 431-first accommodating groove; 44-first sealing member; 50-second temperature collection assembly; 51-second bracket; 511-second body; 512-third extension portion; 513-fourth extension portion; 514-first window; 515-second thermal rivet column; 516-second avoidance hole; 52-second temperature collection component; 53-thermal pad; 54-second reinforcement plate; 61-first busbar; 62-second busbar; 70-isolation plate; 71-third thermal rivet column; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0058] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0059] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application 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 specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0060] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0061] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0062] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0063] The term "multiple" used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two (including two) groups, and "multiple sheets" refers to more than two (including two) sheets.

[0064] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0065] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0066] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0067] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0068] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0069] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0070] In some embodiments, the battery device may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0071] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0072] The battery cells may be, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0073] A battery cell typically includes an electrode assembly. This assembly consists of a positive electrode, a negative electrode, and a separator. During the charge and discharge process, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, located between the positive and negative electrodes, prevents short circuits while allowing the active ions to pass through.

[0074] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0075] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0076] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, the metal foil can be silver-plated stainless steel, stainless steel, copper, aluminum, carbon electrodes, carbon, nickel, or titanium. A composite current collector can include a polymer base 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) on a polymer substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0077] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for battery cells may also be used.

[0078] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0079] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, the metal foil may be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, carbon electrode, carbon, nickel, or titanium.

[0080] In some embodiments, the negative electrode current collector has two opposite surfaces in its thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0081] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells that is 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 materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0082] In some embodiments, the diaphragm is an isolation membrane. The present application has no particular limitation on the type of isolation membrane, and any known isolation membrane with a porous structure having good chemical stability and mechanical stability can be selected.

[0083] As an example, the primary material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator 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 separate component positioned between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0084] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode, and serves to transport ions and isolate the positive and negative electrodes.

[0085] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0086] In some embodiments, the electrode assembly is a laminate structure.

[0087] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0088] In some embodiments, the housing includes an end cap and a shell. The shell has an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly, electrolyte, and other substances. The shell may have one or more openings. One or more end caps may also be provided.

[0089] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to a tab of the electrode assembly. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via a current collector. The electrode terminal may be provided on an end cap or on the housing.

[0090] In some embodiments, the housing is provided with an explosion-proof valve for releasing the internal pressure of the battery cell.

[0091] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. There is no special limitation in the embodiments of the present application.

[0092] In battery technology, existing battery device temperature collection is located at the top of the battery cell group. The temperature of the top cover of the battery cell is generally collected to reflect the temperature of the battery device. However, battery cell temperature collection has a certain lag, with a certain temperature difference between the top cover and the middle of the battery cell. Furthermore, the temperature is transmitted to the temperature collection component through thermally conductive silicone. This makes temperature collection unstable, and it cannot accurately and reliably identify the risk of thermal runaway in the battery device, resulting in poor safety performance of the battery device.

[0093] 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 casing, a battery cell group, a circuit board, a first temperature collection component and a second temperature collection component. The battery cell group is arranged in the casing, and the battery cell group 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 collection component is electrically connected to the circuit board, and the first temperature collection component is used to collect temperature information of the air in the casing; the second temperature collection component is electrically connected to the circuit board, and the second temperature collection component is used to collect temperature information of the battery cells.

[0094] In the battery device provided in the embodiment of the present application, the first temperature acquisition component can directly acquire the temperature information of the air inside the box, and the second temperature acquisition component can acquire the temperature information of the battery cells. With the cooperation of the first temperature acquisition component and the second temperature acquisition component, the temperature information of the battery cells and the air inside the box of the battery device can be monitored, thereby increasing the means of monitoring the thermal runaway risk of the battery device, providing more comprehensive feedback on the internal temperature information of the battery device, reducing the risk of thermal runaway monitoring failure caused by the failure of a single temperature monitoring device, and being able to more accurately identify the thermal runaway risk of the battery device, thereby improving the safety of the battery device.

[0095] The battery device disclosed in the embodiments of the present application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. The battery device disclosed in the present application can be used to form a power supply system for the electrical equipment.

[0096] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0097] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0098] Please refer to Figure 1 , Figure 1Schematic diagram of the structure of the vehicle 1000 provided for some embodiments of the present application. The 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 the vehicle 1000. The battery device 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can be used as an operating power source for the vehicle 1000 and for the circuit system of the vehicle 1000, such as for the working power requirements during the startup, navigation and operation of the vehicle 1000.

[0099] The 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, to meet the power requirements of the vehicle 1000 during startup, navigation, and driving.

[0100] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0101] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structural decomposition of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes a housing 10 and a battery cell 20, and the battery cell 20 is accommodated in the housing 10. The housing 10 is used to provide a storage space for the battery cell 20, and the housing 10 can adopt a variety of structures. In some embodiments, the housing 10 may include a first sub-housing 11 and a second sub-housing 12, and the first sub-housing 11 and the second sub-housing 12 cover each other, and the first sub-housing 11 and the second sub-housing 12 jointly define a storage space for accommodating the battery cell 20. The second sub-housing 12 may be a hollow structure with one end open, and the first sub-housing 11 may be a plate-shaped structure, and the first sub-housing 11 covers the open side of the second sub-housing 12, so that the first sub-housing 11 and the second sub-housing 12 jointly define a storage space; the first sub-housing 11 and the second sub-housing 12 may also be hollow structures with one side open, and the open side of the first sub-housing 11 covers the open side of the second sub-housing 12.

[0102] In the battery device 100, there may be multiple battery cells 20, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel configurations within the battery device 10. The battery cells 20 may be directly connected in series, in parallel, or in a hybrid configuration, and then the entire battery device 20 may be housed within the housing 10. Alternatively, the battery device 100 may comprise a battery module formed by first connecting multiple battery cells 20 in series, in parallel, or in a hybrid configuration, and then the battery modules may be further connected in series, in parallel, or in a hybrid configuration to form a single unit housed within the housing 10.

[0103] The battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar for achieving electrical connection between the plurality of battery cells 20 .

[0104] Please refer to Figure 3 , Figure 3 This is a schematic diagram of an exploded view of a battery cell 20 according to an embodiment of the present invention. The battery cell 20 includes a housing 21, an electrode assembly 22, and electrode terminals 23. The housing 21 includes a shell 211 and an end cap 212. The shell 211 has an opening, and the end cap 212 closes the opening, isolating the internal environment of the battery cell 20 from the external environment.

[0105] The housing 211 is a component used to cooperate with the end cap 212 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 22, electrolyte, and other components. The housing 211 and the end cap 212 can be independent components. The housing 211 can be of various shapes and sizes. Specifically, the shape of the housing 211 can be determined according to the specific shape and size of the electrode assembly 22. The housing 211 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0106] The end cap 212 is a component that covers the opening of the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 212 can be adapted to the shape of the housing 211 to fit the housing 211. Optionally, the end cap 212 can be made of a material with a certain degree of hardness and strength (such as an aluminum alloy). This prevents the end cap 212 from deforming under pressure or collision, thereby enhancing the structural strength and reliability of the battery cell 20. Functional components such as electrode terminals 23 can be provided on the end cap 212. The end cap 212 includes a first wall 213, on which the electrode terminals 23 are disposed. The electrode terminals 23 can be used to electrically connect to the electrode assembly 22 to transfer electrical energy to or from the battery cell 20. The end cap 212 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic, and this is not particularly limited in this embodiment of the present application.

[0107] The electrode assembly 22 is a component where electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 22 may be contained in the housing 211.

[0108] The present application embodiment provides a battery device, please combine Figure 2 、 Figure 4 、 Figure 5 and Figure 6 The battery device 100 includes a housing 10, a battery cell group 24, a circuit board 30, a first temperature collection component 40, and a second temperature collection component 50. The battery cell group 24 is disposed in the housing 10 and 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, which is perpendicular to the first direction X. The first temperature collection component 40 is electrically connected to the circuit board 30 and is used to collect temperature information of the air in the housing. The second temperature collection component 50 is electrically connected to the circuit board 30 and is used to collect temperature information of the battery cells 20. The first temperature collection component 40 includes a first bracket 41 and a first temperature collection component 42. The first temperature collection component 42 is disposed on the first bracket 41 and is electrically connected to the circuit board 30.

[0109] Please refer to Figure 2 The housing 10 is a box structure for accommodating a battery cell group 24. The housing 10 is used to provide space for the battery cell group 24. The battery cell group 24 includes multiple battery cells 20. The multiple battery cells 20 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections. The multiple battery cells 20 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell group 20 is accommodated in the housing.

[0110] The circuit board 30 may be a flexible circuit board or a rigid circuit board and is disposed on one side of the battery cell group 24 along a second direction Y. The second direction Y is perpendicular to the first direction X and may be parallel to the thickness direction of the circuit board 30 .

[0111] The first temperature acquisition component 40 refers to a monitoring mechanism arranged in the box 10 and capable of collecting temperature information of the air inside the box. The first temperature acquisition component 40 can be arranged on one side of the second direction Y of the battery cell group 24, or on the inner wall of the box. The first temperature acquisition component 40 is electrically connected to the circuit board 30, and the circuit board 30 realizes power supply to the first temperature acquisition component 40 and transmission of temperature signals.

[0112] The first temperature acquisition component 42 refers to a sensor that can monitor the temperature information of the air in 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 decreases as the temperature increases.

[0113] The second temperature collection component 50 refers to a monitoring mechanism disposed in the housing 10 and capable of collecting temperature information of the battery cell 20 . The second temperature collection component 50 can be thermally connected to the outer wall of the battery cell 20 to collect temperature information of the battery cell 20 .

[0114] In the battery device 100, the number of the first temperature collection component 40 and the second temperature collection component 50 can be one group or multiple groups. The number and position of the multiple groups of first temperature collection components 42 and second temperature collection components 50 can be arranged as needed, depending on actual conditions.

[0115] The first temperature acquisition component 40 and the second temperature acquisition component 50 can both be communicatively connected to the BMS control system. The collected temperatures of the battery cells 20 and the air temperature are fed back to the BMS control system. The BMS control system, through comprehensive calculations, provides a more comprehensive feedback of the temperature inside the entire battery device. Compared with the method of solely collecting the temperature of the battery cells 20, this method of combining the temperature of the battery cells 20 and the air temperature has higher accuracy and greater safety.

[0116] In the technical solution of the present embodiment, the first temperature acquisition component 40 and the second temperature acquisition component 50 are provided within the battery device 100. The first temperature acquisition component 40 can directly collect temperature information of the air within the housing, while the second temperature acquisition component 50 can collect temperature information of the battery cells 20. The coordinated operation of the first and second temperature acquisition components 40, 50 allows for monitoring the temperature of both the battery cells 20 and the air within the housing. This increases the number of ways to monitor the thermal runaway risk of the battery device 100, provides more comprehensive feedback on the internal temperature information of the battery device 100, reduces the risk of thermal runaway monitoring failure due to a single temperature monitoring failure, and more accurately identifies the thermal runaway risk of the battery device 100, thereby improving the safety of the battery device 100. The first temperature acquisition component 42 is mounted on the first bracket 41. The first bracket 41 supports and secures the first temperature acquisition component 42, improving its installation stability. The first temperature acquisition component 42 is electrically connected to the circuit board 30, which provides power to the first temperature acquisition component 42, enabling it to collect temperature information of the air above the battery cell group 24.

[0117] Moreover, compared with the conventional method of monitoring only the temperature of the battery cell 20, there is a certain difference in the temperature between the top cover of the battery cell 20 and the middle of the battery cell 20, and the transmission method through the thermal pad 53 is generally unstable. When the thermal pad 53 falls off or peels off, there is a certain risk of the temperature being lost. The second temperature acquisition component 50 in this solution can directly contact the air and can quickly sense changes in the air temperature inside the battery device 100. The most direct way to monitor the thermal runaway temperature is also to determine the air temperature inside the battery device 100. This method greatly increases the thermal safety of the battery device 100.

[0118] According to some embodiments of this application, please refer to Figure 5 and Figure 6 , the first bracket 41 is an insulating member.

[0119] The first bracket 41 is an insulating member. It can be made of an insulating material, or it can be made of a non-insulating material with an insulating layer on its surface. If the first bracket 41 is made of an insulating material, it can be made of an insulating material such as plastic or plastic. Insulating materials are materials that prevent the flow of electric current and are widely used in power transmission, electronic equipment, insulating coatings, insulating pipes, and insulating boards. The main characteristics of insulating materials include high resistivity and resistance to electrical breakdown. The resistivity is typically in the range of 10^10 to 10^22 Ω·m.

[0120] By using the first bracket 41 as an insulating member, there is no risk of short circuit between the first temperature collecting component 42 and the first bracket 41 .

[0121] According to some embodiments of this application, please refer to Figure 7 and Figure 8 The second temperature collection component 50 includes a second bracket 51 and a second temperature collection component 52. The second bracket 51 is an insulating member. The second temperature collection component 52 is disposed on the second bracket 51. The second temperature collection component 52 is electrically connected to the circuit board 30.

[0122] The second bracket 51 is an insulating member, and the second bracket 51 may be made of an insulating material; or the second bracket 51 may be made of a non-insulating material, and an insulating layer is provided on the surface of the second bracket 51 .

[0123] The second temperature collection component 52 is mounted on the second bracket 51. The second bracket 51 supports and secures the second temperature collection component 52, improving its installation stability. The second bracket 51 is an insulator, eliminating the risk of short circuiting between the second temperature collection component 52 and the bracket 51. The second temperature collection component 52 is electrically connected to the circuit board 30, which provides power to the second temperature collection component 52, enabling it to collect temperature information from the battery cells 20.

[0124] 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 .

[0125] 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 away from the battery cell group 24 than the second temperature collection component 52, that is, the first temperature collection component 42 is farther away 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.

[0126] 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 collecting component 42 is disposed on the boss 412 .

[0127] The first body 411 is the main structure of the first bracket 41. 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 can be connected to each other in a secondary manner. In this embodiment, the boss 412 and the first body 411 are integrally formed.

[0128] The first bracket 41 includes a first body 411 and a boss 412. The first temperature collection component 42 is arranged on the boss 412. The boss 412 protrudes from the first body 411. The boss 412 can not only provide the first temperature collection component 42 with a supporting and positioning function, but also can overhead the first temperature collection component 42 on the first bracket 41. The first temperature collection component 42 can be further away from the battery cell group 24. The first temperature collection component 42 is less likely to be affected by the temperature of the battery cell 20 and can more accurately collect the temperature information of the air in the box 10.

[0129] According to some embodiments of this application, please refer to Figure 5 and Figure 6 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 collecting component 42 .

[0130] The main body 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 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 collection component 42 on the boss 412.

[0131] 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 .

[0132] It can be understood that the first cantilever portion 32 is a cantilever structure, and the first cantilever portion 32 itself can be bent and deformed downward or upward relative to the main body portion 31, and can even be partially wrinkled to absorb the installation error between the first temperature collection component 42 and the circuit board 30, which is more flexible.

[0133] By setting the first cantilever portion 32 on the circuit board 30, the circuit board 30 can be electrically connected to the first temperature collection 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, which can absorb the installation error of the first temperature collection component 42 and the circuit board 30, and is more conducive to the precise connection between the circuit board 30 and the first temperature collection component 42.

[0134] According to some embodiments of the present application, along the second direction Y, the boss 412 protrudes from a side of the main body 31 facing away from the battery cell group 24 .

[0135] The boss 412 protrudes from the side of the main body 31 away from the battery cell group 24 . That is, the height of the boss 412 away from the battery cell group 24 is higher than the height of the main body 31 away from the battery cell group 24 .

[0136] The boss 412 protrudes from the side of the main body 31 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 collection component 42 is higher, the distance between the first temperature collection component 42 and the battery cell group 24 is farther, the first temperature collection component 42 is less susceptible to the temperature radiation of the battery cell group 24, and the first temperature collection component 42 can more accurately collect the temperature information of the air above the battery cell group 24.

[0137] According to some embodiments of this application, please refer to Figure 6 , the first cantilever portion 32 is a bent structure.

[0138] The bending 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 can be adaptively changed.

[0139] The first cantilever portion 32 is 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 collection component 42 and the first cantilever portion 32. On the other hand, the first cantilever portion 32 can maintain the electrical connection between the circuit board 30 and the first temperature collection component 42 by utilizing the deformation of the first cantilever portion 32 itself when there is a slight relative movement between the circuit board 30 and the first temperature collection component 42, thereby improving stability.

[0140] According to some embodiments of this application, please combine Figure 5 、 Figure 6 and Figure 10 The first temperature collection component 40 also includes a first reinforcement plate 43, which is an insulating member. The first reinforcement plate 43 is arranged on the boss 412, and the first reinforcement plate 43 has a first accommodating groove 431. The first temperature collection component 42 is arranged in the first accommodating groove 431.

[0141] The first reinforcing plate 43 is a component mounted on the first bracket 41 to provide enclosure and protection for the first temperature collection component 42. The first reinforcing plate 43 enhances the stability of the first temperature collection component 42 on the first bracket 41. The first reinforcing plate 43 is an insulating member, meaning it can be made of an insulating material. The first receiving groove 431 of the first reinforcing plate 43 is provided for mounting the first temperature collection component 42.

[0142] Through the provision of the first reinforcing plate 43, the first temperature collection component 42 is disposed in the first receiving groove 431 of the first reinforcing plate 43. On the one hand, the first reinforcing plate 43 can insulate and encapsulate the first temperature collection component 42, so that the first temperature collection component 42 will not be exposed to the external environment, thereby protecting the first temperature collection component 42 and reducing the risk of short circuit. On the other hand, the first temperature collection component 42 is mounted on the first bracket 41 through the first reinforcing plate 43. Compared with the first temperature collection component 42 being mounted on the first bracket 41 itself, the first reinforcing plate 43 is connected to the first bracket 41, which can increase the installation stability of the first temperature collection component 42.

[0143] According to some embodiments of the present application, a portion of the first cantilever portion 32 is located between the first reinforcing plate 43 and the boss 412 .

[0144] A portion of the first cantilever portion 32 is located between the first reinforcing plate 43 and the boss 412, which means that a portion of the first cantilever portion 32 is located outside the boss 412 and the first reinforcing plate 43, and a portion is located between the first reinforcing plate 43 and the top surface of 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.

[0145] 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 glued to fix the first cantilever portion 32 to the boss 412, and the first temperature collection component 42 in the first reinforcement plate 43 is connected to the side of the first cantilever portion 32 away from the boss 412, thereby realizing electrical connection between the first temperature collection component 42 and the circuit board 30.

[0146] A portion of the first cantilever portion 32 is located between the first reinforcing plate 43 and the boss 412. The first cantilever portion 32 has an overlapping portion with the boss 412 and the first temperature collection component 42. The boss 412 provides support and positioning for the first cantilever portion 32. Compared with the case where the first temperature collection component 42 is connected to the first cantilever portion 32 in an area outside the boss 412, the installation stability of the first cantilever portion 32 is higher, and the first cantilever portion 32 is less likely to separate from the first temperature collection component 42.

[0147] According to some embodiments of this application, please combine Figure 5 and Figure 6 Along the second direction Y, the first accommodating groove 431 passes through the first reinforcing plate 43 . The first temperature collection assembly 40 further includes a first sealing member 44 , which seals one end of the first accommodating groove 431 away from the boss 412 .

[0148] The first receiving groove 431 penetrates the first reinforcing plate 43, meaning that the first receiving groove 431 extends through both ends of the first reinforcing plate 43 along the second direction Y. The first receiving groove 431 extends through the end closest to the boss 412, facilitating electrical connection between the first temperature collecting component 42 and the first cantilever portion 32. The first sealing member 44 seals the end of the first receiving groove 431 facing away from the boss 412, meaning that the first sealing member 44 is disposed at the end of the first receiving groove 431 facing away from the boss 412. The first sealing member 44 seals the end of the first receiving groove 431 facing away from the boss 412.

[0149] The first sealing member 44 may be a sealing cover structure, and a vent hole may be provided on the first sealing member 44 . The vent hole allows air in the battery device to enter the first receiving groove 431 , and the first temperature collecting component 42 can collect air temperature information more directly.

[0150] Of course, the first sealing member 44 may also be a viscose structure, and the first receiving groove 431 may be sealed by gluing the upper end of the first receiving groove 431 .

[0151] The first seal 44 seals the end of the first receiving groove 431 away from the boss 412. The first seal 44 can play a dust-proof role, reducing the risk of dust entering the first receiving groove 431 and adhering to the surface of the first temperature collecting component 42, thereby affecting the accuracy of the first temperature collecting component 42.

[0152] According to some embodiments of this application, please combine Figure 5 and Figure 6 The first bracket 41 also includes a first thermal rivet column 413, which is arranged on the boss 412. The first reinforcement plate 43 has a first through hole for the first thermal rivet column 413 to pass through. The first thermal rivet column 413 is used to thermally rivet the first reinforcement plate 43 to the boss 412.

[0153] The first thermal rivet stud 413 is a thermal rivet structure provided on the boss 412. The upper end of the first thermal rivet stud 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 thermal rivet stud 413, the first thermal rivet stud 413 is thermally melted and deformed, thereby thermally riveting the first reinforcing plate 43 to the boss 412.

[0154] The hot riveting process denatures or even melts the connection parts of two metals together by increasing the temperature. Hot riveting is not welding, that is, it denatures or even melts the connection parts of two metals together by increasing the temperature.

[0155] The number of the first thermal rivet studs 413 is one or more. In this embodiment, the number of the first thermal rivet studs 413 is two. The two first thermal rivet studs 413 are spaced apart and distributed on the boss 412. The two first thermal rivet studs 413 cooperate with each other to achieve thermal riveting fixation of the first reinforcement plate 43 and the boss 412.

[0156] By providing a first thermal rivet column 413 on the boss 412, the first thermal rivet column 413 can thermally rivet the first reinforcement plate 43 to the boss 412, so that the installation stability of the first reinforcement plate 43 on the boss 412 is higher, thereby improving the installation stability of the first temperature collection component 42 and reducing the risk of poor contact between the first temperature collection component 42 and the first cantilever portion 32 of the circuit board 30 due to movement or even loosening of the first reinforcement plate 43 and the boss 412.

[0157] According to some embodiments of this application, please combine Figure 5 、 Figure 6 and Figure 9 The first bracket 41 further includes a snap-on portion 414 , one end of which is connected to the first body 411 , and the other end of which is clamped on a side of the first reinforcing plate 43 away from the boss 412 .

[0158] The latch portion 414 is a latch structure on the first bracket 41. The latch portion 414 can bend and deform relative to the first body. The end of the latch portion 414, away from the first body 411, abuts against the side of the first reinforcement plate 43 facing away from the boss 412, providing a position limit for the first reinforcement plate 43 and preventing it from moving relative to the boss 412.

[0159] A snap-fit ​​portion 414 is provided on the first bracket 41, and the upper end of the snap-fit ​​portion 414 is clamped on the side of the first reinforcement plate 43 away from the boss 412. The snap-fit ​​portion 414 can support and limit the first reinforcement plate 43. Under the action of the first thermal rivet column 413 fixing the first reinforcement plate 43, the snap-fit ​​portion 414 can further improve the installation stability between the first reinforcement plate 43 and the boss 412, and further reduce the risk of poor contact between the first temperature collection component 42 and the circuit board 30 due to movement or even loosening of the first reinforcement plate 43.

[0160] According to some embodiments of this application, please combine Figure 2 and Figure 4The battery cell 20 includes an electrode terminal 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, and 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.

[0161] The plurality of first busbars 61 are arranged in a row along the first direction X and located on the first side of the circuit board 30, and the plurality of second busbars 62 are arranged in a row along the first direction X and located on the second side of the circuit board 30. That is, the plurality of first busbars 61 and the plurality of second busbars 62 are respectively located on opposite 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, which means that any two of the third direction Z, the second direction Y, and the first direction X are perpendicular to each other.

[0162] The first busbar 61 electrically connects the electrode terminals 23 on one side of the third direction Z of the battery cell 20, and the second busbar 62 electrically connects the electrode terminals 23 on the other side of the third direction Z of the battery cell 20. The first busbar 61 and the second busbar 62 work together to complete the electrical connection of the electrode terminals 23 of multiple battery cells 20 in the battery cell group 24.

[0163] According to some embodiments of the present application, the battery device further includes an isolation plate 70 . Along the second direction Y, at least a portion of the isolation plate 70 is disposed between the battery cell group 24 and the circuit board 30 .

[0164] The isolation plate 70 may be a blister plate having excellent impact resistance, tensile strength, bending strength and compressive strength.

[0165] The isolation plate 70 is disposed between the battery cell group 24 and the circuit board 30 . The isolation plate 70 can fix and protect the battery cell group 24 , provide heat insulation and protection functions, and ensure the reliability and safety of the battery device.

[0166] According to some embodiments of this application, please combine Figure 6 and Figure 9 The first bracket 41 also includes a first extension portion 415 and a second extension portion 416, which are respectively arranged at the two ends of the first body 411 along the third direction Z; along the second direction Y, the first extension portion 415 is arranged between the first busbar 61 and the isolation plate 70, and the second extension portion 416 is arranged between the second busbar 62 and the isolation plate 70.

[0167] The first extension portion 415 is arranged between the first busbar 61 and the isolation plate 70, which means that along the second direction Y, the first extension portion 415 at least partially overlaps with the first busbar 61 and the isolation plate 70, and the second extension portion 416 is arranged between the second busbar 62 and the isolation plate 70, which means that along the second direction Y, the second extension portion 416 at least partially overlaps with the second busbar 62 and the isolation plate 70.

[0168] Please refer to Figure 5 The isolation plate 70 is provided with a plurality of third thermal staking studs 71. A portion of the plurality of third thermal staking studs 71 ​​is used to thermally secure the first manifold 61 to the isolation plate 70, while a portion of the plurality of third thermal staking studs 71 ​​is used to thermally secure the second manifold 62 to the isolation plate 70. Under the action of the third thermal staking studs 71, the first manifold 61 and the isolation plate 70 respectively press and position the first extension 415, while the second manifold 62 and the isolation plate 70 press and position the second extension 416.

[0169] By disposing 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 collector 61 and the isolation plate 70, and the second extension portion 416 is disposed between the second collector 62 and the isolation plate 70. The first collector 61 and the isolation plate 70 respectively press and position the first extension portion 415, while the second collector 62 and the isolation plate 70 press and position the second extension portion 416, thereby achieving pressure fixation of both ends of the first bracket 41 in the third direction Z. The first bracket 41 is quick and easy to install, without requiring riveting or bonding. Furthermore, if the first temperature acquisition assembly 40 requires subsequent maintenance or replacement, the first bracket 41 can be quickly disassembled, making it easy to install and disassemble.

[0170] According to some embodiments of this application, please refer to Figure 9 The battery cell 20 includes a pressure relief mechanism, and the first body 411 has a first avoidance hole 4111 for avoiding the pressure relief mechanism.

[0171] The pressure relief mechanism is also the explosion-proof valve of the battery cell 20. The size and shape of the first avoidance hole 4111 are adapted to the pressure relief mechanism.

[0172] By disposing the first avoidance hole 4111 on the first body 411 , the first avoidance hole 4111 can play a role in avoiding the pressure relief mechanism of the battery cell 20 without affecting the normal operation of the pressure relief mechanism.

[0173] According to some embodiments of this application, please combine Figure 8 and Figure 11The second bracket 51 has a first window 514 , and the second temperature collection component 52 is installed in the first window 514 ; the second temperature collection assembly 50 also includes a thermal pad 53 , and the second temperature collection component 52 is thermally connected to the battery cell 20 through the thermal pad 53 .

[0174] The first window 514 is a through-hole structure formed on the second bracket 51. The second temperature collection component 52 is disposed in the first window 514. The first window 514 allows the thermal pad 53 to pass through and establish a thermal connection between the second temperature collection component 52 and the battery cell 20. The size of the first window 514 can be adapted to the size of the thermal pad 53.

[0175] The thermal pad 53 refers to a thermally conductive component disposed between the second temperature collection component 52 and the first wall of the battery cell 20. The thermal pad 53 has good thermal conductivity and can transfer the temperature of the battery cell 20 to the second temperature collection component 52, thereby facilitating the second temperature collection component 52 to accurately collect temperature information of the battery cell 20.

[0176] Of course, the second temperature collection component 50 can also include a second reinforcement plate 54, which is an insulating member. The second reinforcement plate 54 has a second receiving groove, and the second temperature collection component 52 is arranged in the second receiving groove. The second temperature collection component 52 is thermally connected to the first wall of the battery cell 20 through the thermal pad 53.

[0177] The second bracket 51 may also include a second body 511, a third extension 512, and a fourth extension 513. The second body 511 is provided with a second heat staking stud 515, which heat stakingly secures the second reinforcement plate 54 to the second bracket 51. The third extension 512 and the fourth extension 513 are respectively disposed at opposite 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 manifold 61 and the isolation plate 70, and the fourth extension 513 is disposed between the second manifold 62 and the isolation plate 70. A second avoidance hole 516 is provided in the second body 511 to allow for the pressure relief structure to pass through.

[0178] By setting the first window 514 on the second bracket 51, the first window 514 can avoid the thermal pad 53. The second temperature collection component 52 is thermally connected to the battery cell 20 through the thermal pad 53. The thermal pad 53 can transfer heat, thereby allowing the second temperature collection component 52 to collect temperature information of the battery cell 20, reducing heat loss, and improving the accuracy of the second temperature collection component 52 in collecting the temperature of the battery cell 20.

[0179] In some embodiments, please refer to Figures 1 to 11The battery device 100 includes a housing 10, a battery cell group 24, a circuit board 30, a first temperature collection assembly 40, and a second temperature collection assembly 50. The battery cell group 24 is disposed within the housing and 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, which is perpendicular to the first direction X. The first temperature collection assembly 40 is electrically connected to the circuit board 30 and is used to collect temperature information of the air within the housing 10. The second temperature collection assembly 50 is electrically connected to the circuit board 30 and is used to collect temperature information of the battery cells 20. The first temperature collection assembly 40 includes a first bracket 41, which is an insulating member, and a first temperature collection component 42. The first bracket 41 is disposed on the first bracket 41 and is electrically connected to the circuit board 30. The second temperature collection assembly 50 includes a second bracket 51 and a second temperature collection component 52 . The second bracket 51 is an insulating member. The second temperature collection component 52 is disposed on the second bracket 51 . The second temperature collection component 52 is electrically connected to the circuit board 30 .

[0180] By configuring the first temperature acquisition component 40 and the second temperature acquisition component 50 within the battery device 100, the first temperature acquisition component 40 can directly acquire the temperature of the air within the housing 10, while the second temperature acquisition component 50 can acquire the temperature of the battery cells 20. The coordinated operation of the first and second temperature acquisition components 40, 50 allows for monitoring the temperature of both the battery cells 20 and the air within the housing. This increases the number of ways to monitor the risk of thermal runaway in the battery device, providing more comprehensive feedback on the internal temperature of the battery device. This reduces the risk of thermal runaway monitoring failures caused by a single temperature monitoring failure, allows for more accurate identification of thermal runaway risks in the battery device, and enhances the safety of the battery device. The first temperature acquisition component 42 is mounted on the first bracket 41, which supports and secures the first temperature acquisition component 42, improving its installation stability. The first bracket 41 is an insulator, preventing the risk of a short circuit between the first temperature collection component 42 and the first bracket 41. The first temperature collection component 42 is electrically connected to the circuit board 30, which provides power to the first temperature collection component 42, enabling the collection of air temperature information above the battery cell group 24. The second temperature collection component 52 is mounted on the second bracket 51, which supports and secures the second temperature collection component 52, improving its installation stability. The second bracket 51 is an insulator, preventing the risk of a short circuit between the second temperature collection component 52 and the second bracket 51. The second temperature collection component 52 is electrically connected to the circuit board 30, which provides power to the second temperature collection component 52, enabling the collection of temperature information of the battery cells 20.

[0181] 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 facing 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 facing away from the battery cell group 24. The first cantilever portion 32 has a bent structure.

[0182] 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 away from the battery cell group 24 than the second temperature collection component 52, that is, the first temperature collection component 42 is farther away from the battery cell group 24. When the first temperature collection component 42 collects the temperature information of the air in the box, 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. The first bracket 41 includes a first body 411 and a boss 412. The first temperature collection component 42 is mounted on the boss 412, which protrudes from the first body 411. The boss 412 not only supports and positions the first temperature collection component 42, but also allows it to be elevated above the first bracket 41. This allows the first temperature collection component 42 to be further away from the battery cell group 24, making it less susceptible to the temperature of the battery cells 20 and enabling more accurate collection of air temperature information within the enclosure. The circuit board 30 is electrically connected to the first temperature collection component 42 via the first cantilever portion 32. The first cantilever portion 32 is partially deformable relative to the main body 31, absorbing any installation errors between the first temperature collection component 42 and the circuit board 30, thereby facilitating a precise connection between the circuit board 30 and the first temperature collection component 42. The boss 412 protrudes from the side of the main body 31 facing away from the battery cell group 24, meaning that the boss 412 is higher than the main body 31 of the circuit board 30. This allows the first temperature collection component 42 to be installed at a higher height and further from the battery cell group 24. This makes the first temperature collection component 42 less susceptible to thermal radiation from the battery cell group 24, allowing it to more accurately collect temperature information from the air above the battery cell group 24. The first cantilever portion 32 is designed with a bent structure that allows it to bend and deform. This not only absorbs installation errors between the first temperature collection component 42 and the first cantilever portion 32, but also allows the first cantilever portion 32 to maintain electrical connection between the circuit board 30 and the first temperature collection component 42 even when there is slight relative movement between the two components, thereby enhancing stability.

[0183] In some embodiments, the first temperature collection assembly 40 further includes a first reinforcing plate 43, which is an insulating member and is disposed on the boss 412. The first reinforcing plate 43 has a first receiving groove 431, within which the first temperature collection component 42 is disposed. A portion of the first cantilever portion 32 is located between the first reinforcing plate 43 and the boss 412. The first receiving groove 431 extends through the first reinforcing plate 43 along the second direction Y. The first temperature collection assembly 40 further includes a first seal 44, which seals the end of the first receiving groove 431 facing away from the boss 412. The first bracket 41 further includes a first heat rivet stud 413, which is disposed on the boss 412. The first reinforcing plate 43 has a first through-hole for the first heat rivet stud 413 to pass through. The first heat rivet stud 413 is used to heat-rivet the first reinforcing plate 43 to the boss 412. The first bracket 41 further includes a buckle portion 414 , one end of which is connected to the first body 411 , and the other end of which is clamped on a side of the first reinforcing plate 43 away from the boss 412 .

[0184] The first temperature collection component 42 is disposed within the first receiving groove 431 of the first reinforcing plate 43. This insulates and encapsulates the first temperature collection component 42, preventing it from being exposed to the outside environment and protecting it from short circuits. Furthermore, the first temperature collection component 42 is mounted on the first bracket 41 via the first reinforcing plate 43. Compared to mounting the first temperature collection component 42 on its own, the connection between the first reinforcing plate 43 and the first bracket 41 enhances the mounting stability of the first temperature collection component 42. A first seal 44 seals the end of the first receiving groove 431 facing away from the boss 412, preventing dust from entering the first receiving groove 431 and adhering to the surface of the first temperature collection component 42, potentially affecting the accuracy of the temperature collection. The first thermal rivet stud 413 is provided on the boss 412 to thermally rivet the first reinforcing plate 43 to the boss 412. This provides greater mounting stability for the first reinforcing plate 43 on the boss 412, thereby improving the mounting stability of the first temperature collection component 42 and reducing the risk of poor contact between the first temperature collection component 42 and the first cantilever portion 32 of the circuit board 30 due to movement or even loosening of the first reinforcing plate 43 and the boss 412. The upper end of the latch portion 414 is secured to the side of the first reinforcing plate 43 facing away from the boss 412. The latch portion 414 supports and limits the first reinforcing plate 43. With the first thermal rivet stud 413 securing the first reinforcing plate 43, the latch portion 414 further improves the mounting stability between the first reinforcing plate 43 and the boss 412, further reducing the risk of poor contact between the first temperature collection component 42 and the circuit board 30 due to movement or even loosening of the first reinforcing plate 43.

[0185] In some embodiments, the battery cells 20 include electrode terminals 23. The battery assembly 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 a first direction X and located on a first side of the circuit board 30. The plurality of second busbars 62 are arranged in a row along the first direction X and located on a second side of the circuit board 30. The first and second sides are spaced apart along a third direction Z, and the third direction Z, the second direction Y, and the first direction X are perpendicular to each other. The battery assembly further includes a separator 70. At least a portion of the separator 70 is disposed between the battery cell group 24 and the circuit board 30 along the second direction Y. The first bracket 41 also includes a first extension portion 415 and a second extension portion 416, which are respectively arranged at the two ends of the first body 411 along the third direction Z; along the second direction Y, the first extension portion 415 is arranged between the first busbar 61 and the isolation plate 70, and the second extension portion 416 is arranged between the second busbar 62 and the isolation plate 70.

[0186] The isolation plate 70 is positioned between the battery cell group 24 and the circuit board 30. It secures and protects the battery cell group 24, providing thermal insulation and protection to ensure the reliability and safety of the battery device. The first extension 415 and second extension 416 are arranged on the first bracket 41. The first extension 415 is positioned between the first manifold 61 and the isolation plate 70, while the second extension 416 is positioned between the second manifold 62 and the isolation plate 70. The first manifold 61 and isolation plate 70 respectively hold the first extension 415 in place, while the second manifold 62 and isolation plate 70 hold the second extension 416 in place. This ensures that both ends of the first bracket 41 are held in place in the third direction Z. This allows for quick and easy installation of the first bracket 41, eliminating the need for riveting or bonding. Furthermore, if the first temperature acquisition assembly 40 requires subsequent maintenance or replacement, the first bracket 41 can be quickly disassembled, making it easy to install and disassemble.

[0187] In some embodiments, the second bracket 51 has a first window 514, and the second temperature collection component 52 is mounted in the first window 514. The second temperature collection assembly 50 also includes a thermal pad 53, through which the second temperature collection component 52 is thermally connected to the battery cell 20. The first window 514 serves to avoid the thermal pad 53. The second temperature collection component 52 is thermally connected to the battery cell 20 through the thermal pad 53, which transfers heat, thereby allowing the second temperature collection component 52 to collect temperature information of the battery cell 20, reducing heat loss and improving the accuracy of the temperature collection of the battery cell 20 by the second temperature collection component 52.

[0188] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions 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, wherein the battery cell group includes a plurality of battery cells arranged along a first direction; a circuit board, disposed on one side of the battery cell group along a second direction, the second direction being perpendicular to the first direction; a first temperature acquisition component, electrically connected to the circuit board, and configured to acquire temperature information of the air in the box; a second temperature acquisition component, electrically connected to the circuit board, and configured to acquire 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; 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. The first temperature collection component is arranged on the boss. The boss suspends the first temperature collection component on the first bracket. The battery cell includes a pressure relief mechanism, and the first body has a first avoidance hole for avoiding the pressure relief mechanism; The circuit board includes a main body and a first cantilever, one end of the first cantilever is connected to the main body, and the other end is electrically connected to the first temperature collecting component; Along the second direction, the boss protrudes from a side of the main body away from the battery cell group.

2. The battery device according to claim 1, wherein: The first bracket is an insulating member.

3. The battery device according to claim 1, wherein: 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. The second temperature collection component is electrically connected to the circuit board.

4. The battery device according to claim 3, characterized in that 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, wherein: The first cantilever portion is a bent structure.

6. The battery device according to claim 1, wherein: The first temperature collection component further includes a first reinforcing plate, which is an insulating member and is disposed on the boss. The first reinforcing plate has a first receiving groove, and the first temperature collection component is disposed in the first receiving groove.

7. The battery device according to claim 6, characterized in that A portion of the first cantilever portion is located between the first reinforcing plate and the boss.

8. The battery device according to claim 6, characterized in that Along the second direction, the first accommodating groove passes through the first reinforcing plate. The first temperature collection assembly further includes a first sealing member, which seals an end of the first accommodating groove away from the boss.

9. The battery device according to claim 6, characterized in that The first bracket further 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.

10. The battery device according to claim 6, 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.

11. The battery device according to claim 1, wherein: 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 busbars are arranged in a row along the first direction and are located on the first side of the circuit board, a plurality of the second busbars are arranged in a row along the first direction and are 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.

12. The battery device according to claim 11, wherein: The battery device further includes an isolation plate, at least a portion of which is disposed between the battery cell group and the circuit board along the second direction.

13. The battery device according to claim 12, characterized in that The first bracket further includes a first extension portion and a second extension portion, wherein the first extension portion and the second extension portion are respectively provided at two ends of the first body along the third direction; Along the second direction, the first extending portion is disposed between the first current collector and the isolation plate, and the second extending portion is disposed between the second current collector and the isolation plate.

14. The battery device according to claim 3, wherein: The second bracket has a first window, and the second temperature collecting component is installed in the first window; The second temperature collection component further includes a thermal pad, and the second temperature collection component is thermally connected to the battery cell via the thermal pad.

15. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 14, the electrical device is used to provide electrical energy.

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