Battery device, power utilization device and energy storage device

Abstract

The embodiment of the utility model provides a battery device, a power utilization device and an energy storage device. The heat dissipation performance of the battery device can be improved. The single battery comprises a single battery body, a heat management component and a first temperature-sensing deformation component, the heat management component comprises a heat exchange body and a current collector, a first accommodating cavity is formed in the heat exchange body, the current collector is connected to at least one end of the heat exchange body along a first direction, a first wall body is arranged in the current collector, and a second accommodating cavity is formed in the first wall body; the first wall body is used for dividing the interior of the current collector into a second containing cavity and a third containing cavity, the first wall body is provided with a first through hole penetrating in the first direction, and the second containing cavity communicates with the third containing cavity through the first through hole. The first temperature sensing deformation part is used for adjusting the flow of the heat exchange medium flowing between the first containing cavity and the second containing cavity.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device, an electrical device, and an energy storage device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In the development of battery technology, besides improving the electrical performance of battery devices, heat dissipation is also a crucial issue. For example, uneven temperature distribution in different areas within different battery devices can reduce their lifespan, and the internal structure of the battery device is prone to thermal runaway at high temperatures, reducing its safety. If the safety of the battery device cannot be guaranteed, it becomes unusable, thus reducing its performance. Therefore, improving the heat dissipation performance of battery devices has become a pressing technical problem to be solved in this field. Utility Model Content

[0004] This application provides a battery device, an electrical device, and an energy storage device that can improve the heat dissipation performance of the battery device.

[0005] In a first aspect, this application provides a battery device, comprising: a battery cell; a thermal management component including a heat exchange body and a current collector, wherein the heat exchange body has a first receiving cavity inside, the current collector is connected to at least one end of the heat exchange body along a first direction, the current collector has a first wall inside, the first wall is used to divide a second receiving cavity and a third receiving cavity inside the current collector, the opening of the third receiving cavity faces the end of the heat exchange body near the current collector, the first wall has a first through hole extending through it along the first direction, the second receiving cavity communicates with the third receiving cavity through the first through hole, the thermal management component is used to contain a heat exchange medium to regulate the temperature of the battery cell, the first direction being the extension direction of the heat exchange body; and a first temperature-sensing deformation component, the first temperature-sensing deformation component being used to regulate the flow rate of the heat exchange medium flowing between the first receiving cavity and the second receiving cavity.

[0006] In this embodiment, the current collector in the thermal management component of the battery device has a first wall inside, which divides the current collector into a second receiving cavity and a third receiving cavity. The opening of the third receiving cavity faces the end of the heat exchange body in the thermal management component near the current collector. The first wall has a first through hole extending along the first direction. The first temperature-sensing deformation component is used to adjust the flow rate of the heat exchange medium flowing between the first receiving cavity and the second receiving cavity. That is, the first temperature-sensing deformation component can adaptively adjust according to the temperature of the heat exchange medium inside the thermal management component. In other words, the first temperature-sensing deformation component can expand or contract according to the temperature change of the heat exchange medium, thereby adjusting the flow rate of the heat exchange medium flowing between the first receiving cavity and the second receiving cavity. This reduces the temperature difference between different areas inside the battery device, improves the uniformity of the internal temperature distribution during heat dissipation, and thus improves the heat dissipation performance of the battery device.

[0007] In some embodiments, the first temperature-sensing deformation member is connected to the surface of the first wall facing the heat exchange body, and the orthographic projection of the first temperature-sensing deformation member covers the orthographic projection of the first through hole on a plane perpendicular to the first direction.

[0008] In this embodiment, by configuring the first temperature-sensing deformable component as a surface connected to the first wall facing the heat exchange body, and on a plane perpendicular to the first direction, the orthographic projection of the first temperature-sensing deformable component covers the orthographic projection of the first through hole, the first temperature-sensing deformable component can adaptively adjust according to the temperature of the heat exchange medium inside the thermal management component. That is, the first temperature-sensing deformable component can expand or shrink according to the temperature change of the heat exchange medium, thereby adjusting the aperture of the first through hole to regulate the flow rate of the heat exchange medium entering the second receiving cavity from the first receiving cavity through the first through hole. This reduces the temperature difference between different areas inside the battery device, improves the uniformity of the internal temperature distribution of the battery device during heat dissipation, and thus improves the heat dissipation performance of the battery device.

[0009] In some embodiments, the first temperature-sensing deformation member is provided with a second through hole that extends through the first temperature-sensing deformation member along the first direction. The second through hole communicates with the first through hole, and on a plane perpendicular to the first direction, the orthographic projection of the second through hole covers the orthographic projection of the first through hole.

[0010] In this embodiment, a second through hole is provided inside the first temperature-sensing deformable component, extending through the first direction. The second through hole communicates with the first through hole, and the orthographic projection of the second through hole covers the orthographic projection of the first through hole on a plane perpendicular to the first direction. The first temperature-sensing deformable component can expand or contract according to the temperature change of the heat exchange medium to adjust the aperture of the second through hole, thereby adjusting the aperture of the first through hole to regulate the flow rate of the heat exchange medium entering the second receiving cavity from the first receiving cavity through the first through hole. This reduces the temperature difference between different areas inside the battery device, improves the uniformity of the internal temperature distribution during heat dissipation, and thus improves the heat dissipation performance of the battery device.

[0011] In some embodiments, the surface of the first wall facing the heat exchange body is provided with a protruding structure. On a plane perpendicular to the thickness direction of the first wall, the protruding structure is arranged around the first through hole. A first groove with an opening facing the heat exchange body is formed between the protruding structure and the first wall. The first temperature-sensing deformation member is accommodated in the first groove and is fixedly connected to the inner wall of the first groove.

[0012] In this embodiment, a protruding structure is provided on the surface of the first wall facing the heat exchange body. On a plane perpendicular to the thickness direction of the first wall, the protruding structure surrounds the first through hole, and a first groove with an opening facing the heat exchange body is formed between the protruding structure and the first wall. The first temperature-sensing deformation component is accommodated in the first groove and fixedly connected to the inner wall of the first groove. This can limit and protect the first temperature-sensing deformation component, reduce the risk of misalignment during use, improve the performance of the first temperature-sensing deformation component, and thus improve the heat dissipation performance of the battery device.

[0013] In some embodiments, the surface of the first temperature-sensing deformation member facing the heat exchange body is flush with the surface of the first groove facing the heat exchange body, or the surface of the first temperature-sensing deformation member facing the heat exchange body is lower than the surface of the first groove facing the heat exchange body.

[0014] In this embodiment, by setting the surface of the first temperature-sensing deformable component facing the heat exchange body to be flush with the surface of the first groove facing the heat exchange body, or by setting the surface of the first temperature-sensing deformable component facing the heat exchange body to be lower than the surface of the first groove facing the heat exchange body, the first temperature-sensing deformable component can be accommodated inside the first groove. This improves the limiting and protective effect of the first groove on the first temperature-sensing deformable component, effectively reduces the risk of misalignment of the first temperature-sensing deformable component during use, and improves the performance of the first temperature-sensing deformable component, thereby improving the heat dissipation performance of the battery device.

[0015] In some embodiments, the first temperature-sensitive deformation component is connected to the inner wall of the first groove by one of the following methods: snap-fit ​​connection, welding connection, adhesive connection, or interference fit connection.

[0016] In this embodiment of the application, the first temperature-sensing deformation component and the inner wall of the first groove are connected by one of the following methods: snap-fit ​​connection, welding connection, adhesive connection or interference fit connection, so as to achieve a fixed connection between the first temperature-sensing deformation component and the inner wall of the first groove. The connection method is simple and easy to process and manufacture.

[0017] In some embodiments, the protruding structure is integrally formed with the first wall. Thus, in this embodiment, by integrally forming the protruding structure with the first wall, the structural strength between the protruding structure and the first wall is improved. This enhances the limiting and protective effect of the first groove on the first temperature-sensitive deformable component when it is housed within the first groove formed by the protruding structure and the first wall, effectively reducing the risk of misalignment during use and improving the performance of the first temperature-sensitive deformable component, thereby improving the heat dissipation performance of the battery device.

[0018] In some embodiments, the maximum dimension D1 of the first temperature-sensing deformable component perpendicular to the first direction satisfies: 2mm ≤ D1 ≤ 4mm. Thus, in this embodiment, by setting the maximum dimension D1 of the first temperature-sensing deformable component perpendicular to the first direction to 2mm ≤ D1 ≤ 4mm, both the usability and installation performance of the first temperature-sensing deformable component are taken into account, thereby improving the heat dissipation performance of the battery device.

[0019] In some embodiments, in the first direction, the maximum distance D2 between the end of the first temperature-sensing deformation member near the heat exchange body and the end of the heat exchange body near the current collector satisfies: 2mm≤D2≤4mm.

[0020] In this embodiment of the application, in the first direction, by setting the maximum distance D2 between the end of the first temperature-sensing deformable component near the heat exchange body and the end of the heat exchange body near the current collector to satisfy: 2mm≤D2≤4mm, the heat exchange medium in the first accommodating cavity can smoothly flow into the second accommodating cavity through the first temperature-sensing deformable component and the first through hole, so as to take into account both the performance of the thermal management component and the manufacturing performance, thereby improving the heat dissipation performance of the battery device.

[0021] In some embodiments, the current collector is provided with an inlet and an outlet on two opposite surfaces perpendicular to the first direction. The inlet is used to allow the heat exchange medium to flow into the second receiving cavity, and the outlet is used to allow the heat exchange medium to flow out of the second receiving cavity. The battery device also includes a second temperature-sensing deformation member, which is fixedly connected to the inner wall of the inlet. The heat exchange medium flows into the second receiving cavity through the second temperature-sensing deformation member.

[0022] In this embodiment, the current collector in the thermal management component has an inlet and an outlet on two opposite surfaces perpendicular to the first direction. The inlet is for the heat exchange medium to flow into the second receiving cavity, and the outlet is for the heat exchange medium to flow out of the second receiving cavity. By fixing the second temperature-sensing deformable component to the inside of the inlet, the heat exchange medium can flow into the second receiving cavity through the second temperature-sensing deformable component. The second temperature-sensing deformable component can adaptively adjust according to the temperature of the heat exchange medium, that is, the second temperature-sensing deformable component can expand or contract according to the temperature change of the heat exchange medium to adjust the flow rate of the heat exchange medium entering the second receiving cavity from the inlet, thereby reducing the temperature difference between different areas inside the battery device, improving the uniformity of the internal temperature distribution of the battery device during heat dissipation, and thus improving the heat dissipation performance of the battery device.

[0023] In some embodiments, the second temperature-sensing deformation member is provided with a third through hole extending through the second temperature-sensing deformation member along the flow direction of the heat exchange medium, and the third through hole communicates with the second receiving cavity.

[0024] In this embodiment, a third through-hole is provided inside the second temperature-sensing deformable component, extending through the heat exchange medium along its flow direction and communicating with the second accommodating cavity. The second temperature-sensing deformable component can expand or contract according to the temperature change of the heat exchange medium to adjust the aperture of the third through-hole. This allows for the regulation of the flow rate of the heat exchange medium entering the second accommodating cavity from the inlet through the third through-hole, thereby reducing the temperature difference between different areas inside the battery device, improving the uniformity of internal temperature distribution during heat dissipation, and ultimately enhancing the heat dissipation performance of the battery device.

[0025] The uniformity of internal temperature distribution during heat dissipation improves the heat dissipation performance of the battery device.

[0026] In some embodiments, the battery device further includes a high-voltage box and a plurality of the thermal management components, wherein the second temperature-sensitive deformation component is disposed on the thermal management component of the plurality of thermal management components near the high-voltage box.

[0027] In this embodiment, the battery device further includes a high-voltage box and multiple thermal management components. Because the flow rate of the heat exchange medium in the thermal management component near the high-voltage box differs significantly from that in the thermal management component away from the high-voltage box, the temperature difference between different areas inside the battery device is large during heat dissipation. By placing the second temperature-sensing deformable component on the thermal management component near the high-voltage box and placing it inside the liquid inlet of the thermal management component, the flow rate of the heat exchange medium entering the second receiving cavity from the liquid inlet through the third through-hole is adjusted. This adjusts the flow rate of the heat exchange medium in the thermal management component near the high-voltage box, effectively reducing the temperature difference between different areas inside the battery device, improving the uniformity of internal temperature distribution during heat dissipation, and thus improving the heat dissipation performance of the battery device.

[0028] In some embodiments, the maximum thickness D3 of the first temperature-sensing deformable component satisfies: 1mm ≤ D3 ≤ 2mm. Thus, in this embodiment, by setting the maximum thickness D3 of the first temperature-sensing deformable component to satisfy: 1mm ≤ D3 ≤ 2mm, both the performance and manufacturing performance of the first temperature-sensing deformable component are taken into account, thereby improving the performance of the thermal management component and improving the heat dissipation performance of the battery device.

[0029] In some embodiments, the material of the first temperature-sensitive deformable component includes at least one of the following materials: polyethylene, polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, and nickel sulfide.

[0030] In this embodiment, the material of the first temperature-sensing deformable component is set to include at least one of the following materials: antimony, bismuth, polyethylene, polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, and nickel sulfide. This allows the first temperature-sensing deformable component to deform according to the temperature change of the heat exchange medium in the thermal management component, thereby adjusting the flow rate of the heat exchange medium flowing through the thermal management component. This effectively reduces the temperature difference between different areas inside the battery device, improves the uniformity of the internal temperature distribution of the battery device during heat dissipation, and thus improves the heat dissipation performance of the battery device.

[0031] In a second aspect, an electrical device is provided, including the battery device described in the first aspect, the battery device being used to provide electrical energy to the electrical device.

[0032] In some implementations, the electrical device can be a vehicle, ship, or spacecraft.

[0033] Thirdly, an energy storage device is provided, including the battery device described in the first aspect, the battery device being used to store electrical energy for the energy storage device. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application.

[0036] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application.

[0037] Figure 3 This is a schematic diagram of the structure of a battery cell provided in an embodiment of this application.

[0038] Figure 4 This is a partial structural schematic diagram of a battery device provided in another embodiment of this application.

[0039] Figure 5 This is a schematic diagram of the structure of a thermal management component provided in an embodiment of this application.

[0040] Figure 6 This is an exploded structural diagram of a thermal management component provided in an embodiment of this application.

[0041] Figure 7 This is a cross-sectional schematic diagram of a portion of the current collector structure provided in an embodiment of this application.

[0042] Figure 8 This is a cross-sectional schematic diagram of a portion of the current collector structure provided in another embodiment of this application.

[0043] Figure 9 This is a cross-sectional schematic diagram of a portion of the structure of a thermal management component provided in another embodiment of this application.

[0044] Figure 10 This is a cross-sectional schematic diagram of a portion of the current collector structure provided in another embodiment of this application.

[0045] Explanation of reference numerals in the attached drawings: 1-Vehicle; 10-Battery unit; 20-Battery cell; 30-Controller; 40-Motor; 11-Casing; 111-First part; 112-Second part; 112a-Base plate; 112b-Side plate; 21-Outer shell; 211-Housing shell; 212-Cover plate; 213-Pressure relief mechanism; 222a-Positive electrode tab; 222b-Negative electrode tab; 214-Electrode terminal; 214a-Positive electrode terminal; 214b-Negative electrode terminal; 50-Thermal management component; 510 - Heat exchanger body; 511- First receiving cavity; 520- Current collector; 521- First wall; 522- Second receiving cavity; 523- Third receiving cavity; 524- First through hole; 610- First temperature-sensing deformation component; 611- Second through hole; 5211- Protruding structure; 525- First groove; 530- Liquid inlet; 540- Liquid outlet; 620- Second temperature-sensing deformation component; 621- Third through hole; 70- High-pressure box; 80- Flow pipe; 810- First opening; 820- Second opening.

[0046] The accompanying drawings are not drawn to scale. Detailed Implementation

[0047] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0050] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0053] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0054] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0055] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0056] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0057] 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.

[0058] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0059] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0060] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, a positive electrode active material is filled and / or deposited within the foamed metal.

[0061] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0062] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0063] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0064] As an example, the negative electrode current collector has two surfaces opposite each other in its own 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.

[0065] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. 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, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional 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.

[0066] In some embodiments, the negative electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not have a negative electrode active material.

[0067] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0068] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0069] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0070] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0071] As an example, the main 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 single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0072] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0073] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0074] Liquid electrolytes include electrolyte salts and solvents.

[0075] In some embodiments, the electrolyte may optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cell, such as additives that improve the overcharge / fast charge performance of the battery cell, additives that improve the high-temperature performance of the battery cell, and additives that improve the low-temperature performance of the battery cell.

[0076] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0077] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0078] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0079] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium-germanium-phosphorus-sulfur, sulfosilium-germanium), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0080] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0081] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0082] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0083] In some implementations, the electrode assembly is a stacked structure.

[0084] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0085] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0086] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0087] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0088] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0089] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0090] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0091] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0092] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0093] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the cover plate or on the housing.

[0094] In some embodiments, a pressure relief mechanism is provided on the casing. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0095] As an example, the internal pressure or temperature of a battery cell is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is broken, thereby creating an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell.

[0096] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0097] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0098] The term "actuation" as used in this application refers to the activation or actuation of the pressure relief mechanism to a certain state, thereby releasing the internal pressure and temperature of the battery cell. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the mechanism, etc. When the pressure relief mechanism is activated, the high-temperature, high-pressure substances inside the battery cell are discharged as waste from the activated portion. This method allows for pressure and temperature relief of the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0099] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell.

[0100] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0101] The battery device mentioned in the embodiments of this 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 mixed connections via a busbar.

[0102] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0103] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0104] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0105] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0106] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0107] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0108] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0109] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0110] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0111] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery clusters may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0112] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0113] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0114] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0115] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0116] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0117] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes auxiliary battery management units, integrated switches, and other modules.

[0118] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an insulation monitoring module, a main battery management unit, and Ethernet and fiber optic conversion modules.

[0119] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0120] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0121] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development. In the development of battery technology, besides improving the electrical performance of battery devices, heat dissipation is also a significant issue. For example, uneven temperature distribution in different areas within different battery devices can reduce battery lifespan and increase the risk of thermal runaway at high temperatures, thus compromising battery safety. Typically, when using wide-width water-cooled plates to dissipate heat from multiple battery cells, the flow rate of the heat exchange medium is higher on the side closer to the external heat exchange components and lower on the side farther away. This uneven flow rate distribution leads to significant temperature differences between battery cells and an uneven internal temperature distribution, which, over time, reduces battery lifespan and increases the risk of thermal runaway. Currently, manually adjusting the size of the openings in the current collector is necessary, but this adjustment is quite difficult. If the safety of a battery device cannot be guaranteed, then the device cannot be used, thus reducing its performance. Therefore, improving the heat dissipation performance of individual battery cells has become a pressing technical problem in this field.

[0122] Therefore, embodiments of this application provide a battery device, an electrical device, and an energy storage device. The battery device includes: a battery cell, a thermal management component, and a first temperature-sensing deformation component. The thermal management component includes a heat exchange body and a current collector. The heat exchange body has a first receiving cavity inside. The current collector is connected to at least one end of the heat exchange body along a first direction. The current collector has a first wall inside, which is used to divide a second receiving cavity and a third receiving cavity inside the current collector. The opening of the third receiving cavity faces the end of the heat exchange body near the current collector. The first wall has a first through hole penetrating the first wall along the first direction. The second receiving cavity communicates with the third receiving cavity through the first through hole. The thermal management component is used to contain a heat exchange medium to regulate the temperature of the battery cell. The first direction is the extension direction of the heat exchange body. The first temperature-sensing deformation component is used to regulate the flow rate of the heat exchange medium flowing between the first receiving cavity and the second receiving cavity.

[0123] Thus, in this embodiment of the application, the current collector in the thermal management component of the battery device is provided with a first wall, which is used to divide the current collector into a second receiving cavity and a third receiving cavity. The opening of the third receiving cavity faces the end of the heat exchange body in the thermal management component near the current collector. The first wall is provided with a first through hole extending along the first direction. The first temperature-sensing deformation component is used to adjust the flow rate of the heat exchange medium flowing between the first receiving cavity and the second receiving cavity. That is, the first temperature-sensing deformation component can adaptively adjust according to the temperature of the heat exchange medium inside the thermal management component. In other words, the first temperature-sensing deformation component can expand or contract according to the temperature change of the heat exchange medium, thereby adjusting the flow rate of the heat exchange medium flowing between the first receiving cavity and the second receiving cavity. This reduces the temperature difference between different areas inside the battery device, improves the uniformity of the internal temperature distribution of the battery device during heat dissipation, and thus improves the heat dissipation performance of the battery device.

[0124] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0125] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0126] It should be understood that the technical solutions described in the embodiments of this application are not limited to the electrical equipment described above, but can also be applied to all devices that use batteries. For the sake of simplicity, the following embodiments will be described in detail using a vehicle as an example of electrical equipment.

[0127] For example, such as Figure 1The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A motor 40, a controller 30, and a battery device 10 can be installed inside vehicle 1. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1, for example, to meet the electrical system requirements of vehicle 1, such as for starting, navigation, and operation. In another embodiment of this application, the battery device 10 can not only serve as the operating power source for vehicle 1, but also as the driving power source for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.

[0128] To meet different power demands, the battery device 10 in this embodiment may include at least one battery cell assembly, which comprises multiple battery cells. These multiple battery cells can be electrically connected in series, parallel, or a combination thereof to form the battery device 10. A combination of series and parallel connections is used. The battery device 10 may also be referred to as a battery pack. For example, multiple battery cells can first be connected in series, parallel, or a combination to form a battery module, and then multiple battery modules can be connected in series, parallel, or a combination thereof to form the battery device 10. That is, multiple battery cells can directly form the battery device 10, or they can first be assembled into battery modules, and then the battery modules can be assembled into the battery device 10.

[0129] For example, such as Figure 2 The diagram shown is a structural schematic of a battery device 10 according to an embodiment of this application. The battery device 10 may include a plurality of battery cells 20. The battery device 10 may also include a housing 11 (or cover), the housing 11 having a hollow structure, and the plurality of battery cells 20 are housed within the housing 11. For example, the plurality of battery cells 20 may be connected in parallel, in series, or in a mixed configuration and then placed within the housing 11.

[0130] like Figure 2As shown, the housing 11 may include two parts, referred to here as the first structure 111 and the second structure 112, which are fastened together. The shapes of the first structure 111 and the second structure 112 can be determined according to the combined shape of multiple battery cells 20. Both the first structure 111 and the second structure 112 may have an opening. For example, both the first structure 111 and the second structure 112 can be hollow cuboids with only one open face each. The openings of the first structure 111 and the second structure 112 are opposite to each other, and the first structure 111 and the second structure 112 are fastened together to form a housing 11 with a closed cavity. The second structure 112 may include a bottom plate 112a, a side plate 112b, and a beam. Multiple battery cells 20 are connected in parallel, series, or mixed configurations and placed inside the housing 11 formed by the fastening of the first structure 111 and the second structure 112.

[0131] Optionally, the battery device 10 may also include other structures, which will not be described in detail here. For example, the battery device 10 may also include a busbar component for realizing the electrical connection between multiple battery cells 20, such as parallel, series, or mixed connection. Specifically, the busbar component can realize the electrical connection between battery cells 20 by connecting the electrode terminals of the battery cells 20. Further, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can be further led out through the housing by a conductive mechanism. Optionally, the conductive mechanism may also be part of the busbar component.

[0132] The number of battery cells 20 can be set to any value depending on different power requirements. Multiple battery cells 20 can be connected in series, parallel, or mixed to achieve a larger capacity or power. Since each battery device 10 may include a large number of battery cells 20, for ease of installation, the battery cells 20 can be grouped, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in a battery module is unlimited and can be set according to requirements.

[0133] In this embodiment, the number of battery cells 20 can be set to any value according to different power requirements. Multiple battery cells 20 can be connected in series, parallel, or mixed connection to achieve a larger capacity or power. Since each battery device 10 may include a large number of battery cells 20, for ease of installation, the battery cells 20 can be grouped, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in a battery module is not limited and can be set according to requirements. The battery device 10 may include multiple battery modules, which can be connected in series, parallel, or mixed connection.

[0134] Figure 3A schematic diagram of the structure of a battery cell 20 according to an embodiment of this application is shown. Figure 3 As shown, the battery cell 20 in this embodiment may include: a housing 21 and an electrode assembly. The housing 21 has a closed receiving space, and the electrode assembly is placed in the receiving space within the housing 21. The housing 21 may include a shell 211 and a cover plate 212. The shell 211 is a hollow structure with at least one opening; the cover plate 212 is used to fasten with the shell 211 to form the housing 21 with a closed receiving space.

[0135] In some embodiments, the cover plate 212 may be a plate-like structure used to cover the opening of the housing 211. In other embodiments, the cover plate 212 has a similar structure to the housing 211, that is, both the housing 211 and the cover plate 212 are hollow structures with one opening, and the two openings are joined together to form an outer shell 21 with a closed accommodating space.

[0136] It should be understood that if the cover plate 212 is a plate-shaped structure, the shell 211 can be a hollow structure with an opening at one or more ends. For example, if the shell 211 is a hollow structure with an opening at one end, the cover plate 212 can be set as one; if the shell 211 is a hollow structure with openings at opposite ends, the cover plate 212 can be set as two, and the two cover plates 212 respectively cover the openings at both ends of the shell 211.

[0137] The outer shell 21 can be of various shapes, such as a cylinder, a cuboid, or other polyhedrons. For example, ... Figure 3 As shown in the embodiments of this application, the description mainly takes the outer shell 21 as a cuboid structure.

[0138] It should be understood that the cover plate 212 in this embodiment of the application is used to cooperate with the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the cover plate 212 can be adapted to the shape of the housing 211, such as... Figure 3 As shown, the shell 211 has a cuboid structure, and the cover plate 212 has a rectangular plate structure that is adapted to the shell 211.

[0139] In some embodiments, the housing 211 may be a hollow structure with an opening at at least one end, and the shape of the cover plate 212 may be adapted to the shape of the housing 211. The cover plate 212 is used to cover the opening of the housing 211 so that the housing 21 isolates the internal environment of the battery cell 20 from the external environment. If the housing 211 is a hollow structure with an opening at one end, the cover plate 212 may be provided as one.

[0140] The shell 211 in this embodiment may be made of one or more materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The cover plate 212 may also be made of one or more materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the cover plate 212 may be the same as or different from that of the shell 211; the materials of the different walls of the shell 211 may also be the same or different.

[0141] The cover plate 212 in this embodiment can be any wall of the outer shell 21. For example, the cover plate 212 can be the wall with the largest area among the multiple walls included in the outer shell 21, or the wall with the smallest area, or it can be other walls. This embodiment is not limited to this. Alternatively, the cover plate 212 can also be other structures. For example, the cover plate 212 can also be a groove structure with an opening to cover the opening of the housing 211. This embodiment is not limited to this.

[0142] It should be understood that the battery cell 20 also includes electrode terminals 214. In this embodiment, the electrode terminals 214 are used for electrical connection with the electrode assembly 22 inside the battery cell 20 to output the electrical energy of the battery cell 20. Figure 3 As shown, the battery cell 20 may include at least two electrode terminals 214, which may include at least one positive electrode terminal 214a and at least one negative electrode terminal 214b. The positive electrode terminal 214a is used for electrical connection to the positive electrode tab 222a of the electrode assembly 22, and the negative electrode terminal 214b is used for electrical connection to the negative electrode tab 222b of the electrode assembly 22. The positive electrode terminal 214a and the positive electrode tab 222a may be directly connected or indirectly connected, and the negative electrode terminal 214b and the negative electrode tab 222b may be directly connected or indirectly connected. For example, the positive electrode terminal 214a may be electrically connected to the positive electrode tab 222a through a connecting member (not shown in the figure), and the negative electrode terminal 214b may be electrically connected to the negative electrode tab 222b through a connecting member.

[0143] In this embodiment, the wall of the housing 211 and the wall of the cover plate 212 are both referred to as the wall of the battery cell 20, wherein for Figure 3The rectangular battery cell 20 shown has a housing 211 with a bottom wall and four side walls. The housing 211 is shaped according to the combination of one or more electrode assemblies 22. For example, the housing 211 can be a hollow cuboid, cube, or cylinder, and one face of the housing 211 has an opening to allow one or more electrode assemblies 22 to be placed inside. For example, when the housing 211 is a hollow cuboid or cube, one plane of the housing 211 is an opening, meaning that plane does not have a wall, allowing communication between the inside and outside of the housing 211. When the housing 211 is a hollow cylinder, one end face of the housing 211 is an opening, meaning that end face does not have a wall, allowing communication between the inside and outside of the housing 211. A cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for placing the electrode assemblies 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0144] In some implementations, the cover plate 212 of the battery cell 20 is provided with an injection hole, through which electrolyte is injected into the battery cell 20 to replenish the electrolyte in the battery cell 20.

[0145] Figure 4 A partial structural schematic diagram of a battery device 10 provided in another embodiment of this application is shown. Figure 5 A schematic diagram of the structure of a thermal management component 50 provided in an embodiment of this application is shown. Figure 6 An exploded structural diagram of a thermal management component 50 provided in an embodiment of this application is shown. Figure 7 A cross-sectional schematic diagram of a portion of the structure of a current collector 520 according to an embodiment of this application is shown. Exemplarily, Figure 6 Can be Figure 5 The exploded view of the thermal management component 50 is shown in the figure. Figure 7 Can be Figure 5 or Figure 6 A cross-sectional schematic diagram of a portion of the current collector 520 in the thermal management component 50 is shown.

[0146] In some implementations, such as Figures 4 to 7As shown, the battery device 10 includes: a battery cell 20, a thermal management component 50, and a first temperature-sensing deformation component 610. The thermal management component 50 includes a heat exchange body 510 and a current collector 520. The heat exchange body 510 has a first receiving cavity 511 inside. The current collector 520 is connected to at least one end of the heat exchange body 510 along a first direction. The current collector 520 has a first wall 521 inside, which is used to divide the current collector 520 into a second receiving cavity 522 and a third receiving cavity 523. The opening of 23 faces the end of the heat exchange body 510 near the current collector 520. The first wall 521 is provided with a first through hole 524 extending along the first direction. The second receiving cavity 522 communicates with the third receiving cavity 523 through the first through hole 524. The thermal management component 50 is used to contain the heat exchange medium to regulate the temperature of the battery cell 20. The first direction is the extension direction of the heat exchange body 510. The first temperature-sensing deformation component 610 is used to regulate the flow rate of the heat exchange medium flowing between the first receiving cavity 511 and the second receiving cavity 522.

[0147] It should be understood that one or more heat exchange channels may be formed inside the heat exchange body 510 of the thermal management component 50 in this application embodiment, and these heat exchange channels are used for the flow of heat exchange medium. When multiple heat exchange channels are formed inside the heat exchange body 510, these channels may be arranged continuously or at intervals along a direction perpendicular to the extension of the heat exchange body 510. In some implementations, the heat exchange body 510 may also be referred to as a harmonica tube sheet. It should also be understood that the shape of the heat exchange channels inside the heat exchange body 510 in a plane perpendicular to the thickness direction of the heat exchange body 510 can be set according to actual needs. For example, the shape of the heat exchange channels inside the heat exchange body 510 in a plane perpendicular to the thickness direction of the heat exchange body 510 may be M-shaped or S-shaped.

[0148] For example, a thermal management component 50 in this embodiment may include one or two current collectors 520. When the thermal management component 50 includes two current collectors 520, the two current collectors 520 are respectively connected to both ends of the heat exchange body 510 along its extending direction. For example, the end region of the heat exchange body 510 facing the current collector 520 may be snap-fitted to the current collector 520, so that the heat exchange medium can communicate between the current collector 520 and the heat exchange body 510. In some implementations, the current collector 520 may also be welded, threaded, or integrally injection molded to the heat exchange body 510.

[0149] It should also be understood that the battery device 10 in the embodiments of this application may include a plurality of battery cells 20 and a plurality of thermal management components 50. The battery cells 20 may be disposed in the gap between two adjacent thermal management components 50. For example, the two opposing sidewalls of the battery cells 20 may be attached to the sidewalls of the heat exchange bodies 510 of the two adjacent thermal management components 50 near the battery cells 20, so as to realize the temperature regulation of the battery cells 20 by the two thermal management components 50.

[0150] It should also be understood that the thermal management component 50 in this embodiment of the application, used to contain the heat exchange medium to regulate the temperature of the battery cell 20, can mean that the thermal management component 50 can cause the battery cell 20 to heat up or cool down. Specifically, the thermal management component 50 can be configured according to actual conditions. It should also be understood that the heat exchange medium in this embodiment of the application can be at least one of the following: water, ethylene glycol, propylene glycol, acetone, dimethyl carbonate, etc.

[0151] It should also be understood that the first wall 521 provided inside the current collector 520 is used to divide the inside of the current collector 520 into a second receiving cavity 522 and a third receiving cavity 523. The second receiving cavity 522 can be connected to an external heat exchange device through a flow pipe 80, that is, the heat exchange medium output from the heat exchange device flows into the second receiving cavity 522 through the flow pipe 80. Figure 4 As shown, the flow pipeline 80 may include a first opening 810 and a second opening 820. The heat exchange medium output from the external heat exchange device can enter through the first opening 810 and flow into different thermal management components 50 in sequence. Then the heat exchange medium flows out from the thermal management component 50 and flows out to the external heat exchange device through the second opening 820 to form a heat exchange circuit for regulating the temperature of the battery cell 20.

[0152] It should also be understood that the first wall 521 is provided with a first through hole 524 extending through the first direction, and the second receiving cavity 522 communicates with the third receiving cavity 523 through the first through hole 524, that is, the heat exchange medium located in the second receiving cavity 522 can flow into the third receiving cavity 523 through the first through hole 524. It should also be understood that the shape of the first through hole 524 provided on the first wall 521 can be set according to actual needs. On a plane perpendicular to the thickness direction of the first wall 521, the shape of the first through hole 524 can be circular, elliptical, polygonal, rectangular, etc. It should also be understood that the number of first through holes 524 provided on each first wall 521 can be set according to actual needs. For example, the first wall 521 can be provided with one or more of the above-mentioned first through holes 524.

[0153] It should also be understood that the first wall 521 with the first through hole 524 in the embodiments of this application can be integrally formed with the current collector 520 or separately formed. For example, if the first wall 521 can be integrally formed with the current collector 520, the first wall 521 can be integrally injection molded with the current collector 520. Alternatively, if the first wall 521 can be separately formed with the current collector 520, the first wall 521 can be welded to the inner wall of the current collector 520.

[0154] It should also be understood that the first temperature-sensing deformable component 610 in this embodiment can deform according to the temperature change of the battery cell 20. For example, as the temperature of the battery cell 20 increases, it is necessary to improve the heat dissipation performance of the thermal management component 50. The first temperature-sensing deformable component 610 contracts as the temperature increases, so that the flow area of ​​the heat exchange medium in the plane perpendicular to the first direction increases, that is, the flow rate of the heat exchange medium flowing through the first temperature-sensing deformable component 610 increases, thereby improving the heat dissipation performance of the thermal management component 50. As the temperature of the battery cell 20 decreases, the first temperature-sensing deformable component 610 expands as the temperature decreases, so that the flow area of ​​the heat exchange medium in the plane perpendicular to the first direction decreases, that is, the flow rate of the heat exchange medium flowing through the first temperature-sensing deformable component 610 decreases.

[0155] It should also be understood that the shape of the first temperature-sensitive deformation component 610 can be set according to actual needs. For example, the first temperature-sensitive deformation component 610 can be set as a cylinder, square, or polygon, etc. For example, when the first temperature-sensitive deformation component 610 is set as a heat-shrinkable sleeve, the first temperature-sensitive deformation component 610 can shrink at 10℃-20℃ and expand at 20℃-30℃.

[0156] In this embodiment, a first wall 521 is provided inside the current collector 520 of the thermal management component 50 of the battery device 10. The first wall 521 serves to divide the current collector 520 into a second receiving cavity 522 and a third receiving cavity 523. The opening of the third receiving cavity 523 faces the end of the heat exchange body 510 in the thermal management component 50 near the current collector 520. The first wall 521 is provided with a first through hole 524 penetrating the first wall 521 along a first direction. A first temperature-sensing deformation member 610 is fixedly connected to the surface of the first wall 521 facing the heat exchange body 510. The first temperature-sensing deformation member 610 connects the first receiving cavity 511 and the second receiving cavity 522. On a plane perpendicular to the first direction, the orthographic projection of the first temperature-sensing deformable component 610 covers the orthographic projection of the first through hole 524. The first temperature-sensing deformable component 610 can adaptively adjust according to the temperature of the heat exchange medium inside the thermal management component 50. That is, the first temperature-sensing deformable component 610 can expand or shrink according to the temperature change of the heat exchange medium, thereby adjusting the aperture of the first through hole 524. This adjusts the flow rate of the heat exchange medium entering the second receiving cavity 522 from the first receiving cavity 511 through the first through hole 524, thereby reducing the temperature difference between different areas inside the battery device 10, improving the uniformity of the internal temperature distribution of the battery device 10 during heat dissipation, and thus improving the heat dissipation performance of the battery device 10.

[0157] In some implementations, such as Figures 4 to 7 As shown, the first temperature-sensing deformation member 610 is connected to the surface of the first wall 521 facing the heat exchange body 510. On a plane perpendicular to the first direction, the orthographic projection of the first temperature-sensing deformation member 610 covers the orthographic projection of the first through hole 524.

[0158] It should be understood that the first temperature-sensing deformable component 610 is fixedly connected to the surface of the first wall 521 facing the heat exchange body 510. Specifically, one end of the first temperature-sensing deformable component 610 facing the first wall 521 can be fixedly connected to the surface of the first wall 521 facing the heat exchange body 510. Specifically, the first temperature-sensing deformable component 610 can be snap-fitted or adhesively connected to the surface of the first wall 521 facing the heat exchange body 510.

[0159] It should also be understood that the first temperature-sensing deformation component 610 can be used to connect the second receiving cavity 522 and the third receiving cavity 523. On a plane perpendicular to the first direction, the orthographic projection of the first temperature-sensing deformation component 610 covers the orthographic projection of the first through hole 524. That is, the heat exchange medium located in the first receiving cavity 511 can enter the second receiving cavity 522 in sequence through the first temperature-sensing deformation component 610 and the first through hole 524.

[0160] In this embodiment, by configuring the first temperature-sensing deformable component 610 as a surface connected to the first wall 521 facing the heat exchange body 510, and on a plane perpendicular to the first direction, the orthographic projection of the first temperature-sensing deformable component 610 covers the orthographic projection of the first through hole 524, the first temperature-sensing deformable component 610 can adaptively adjust according to the temperature of the heat exchange medium inside the thermal management component 50. That is, the first temperature-sensing deformable component 610 can expand or shrink according to the temperature change of the heat exchange medium, thereby adjusting the aperture of the first through hole 524 to regulate the flow rate of the heat exchange medium entering the second receiving cavity 522 from the first receiving cavity 511 through the first through hole 524, thereby reducing the temperature difference between different areas inside the battery device 10, improving the uniformity of the internal temperature distribution of the battery device 10 during heat dissipation, and thus improving the heat dissipation performance of the battery device 10.

[0161] In some implementations, such as Figure 7 As shown, the first temperature-sensing deformation component 610 is provided with a second through hole 611 that extends through the first direction. The second through hole 611 communicates with the first through hole 524. On a plane perpendicular to the first direction, the orthographic projection of the second through hole 611 covers the orthographic projection of the first through hole 524.

[0162] It should be understood that the shape of the second through hole 611 provided on the first temperature-sensing deformation component 610 can be set according to actual needs. On a plane perpendicular to the first direction, the shape of the second through hole 611 can be circular, elliptical, polygonal, rectangular, etc.

[0163] It should also be understood that, on a plane perpendicular to the first direction, the orthographic projection of the second through-hole 611 overlaps the orthographic projection of the first through-hole 524, meaning that the heat exchange medium in the first receiving cavity 511 can flow into the second receiving cavity 522 sequentially through the second through-hole 611 and the first through-hole 524. Furthermore, the first temperature-sensing deformation member 610 can deform according to the temperature change of the battery cell 20, meaning the aperture of the second through-hole 611 can deform according to the temperature change of the battery cell 20. For example, as the temperature of the battery cell 20 increases, the aperture of the second through-hole 611 gradually increases, thereby increasing the flow rate of the heat exchange medium flowing through the second through-hole 611 and improving the heat dissipation performance of the thermal management component 50. Alternatively, as the temperature of the battery cell 20 decreases, the aperture of the second through-hole 611 gradually decreases, thereby reducing the flow rate of the heat exchange medium flowing through the second through-hole 611 and slowing down the heat dissipation performance of the thermal management component 50.

[0164] In this embodiment, a second through hole 611 is provided inside the first temperature-sensing deformable component 610, extending through the first direction. The second through hole 611 communicates with the first through hole 524, and the orthographic projection of the second through hole 611 covers the orthographic projection of the first through hole 524 on a plane perpendicular to the first direction. The first temperature-sensing deformable component 610 can expand or contract according to the temperature change of the heat exchange medium to adjust the aperture of the second through hole 611, thereby adjusting the aperture of the first through hole 524. This adjusts the flow rate of the heat exchange medium entering the second receiving cavity 522 from the first receiving cavity 511 through the first through hole 524, reducing the temperature difference between different areas inside the battery device 10, improving the uniformity of the internal temperature distribution during heat dissipation, and thus improving the heat dissipation performance of the battery device 10.

[0165] Figure 8 A cross-sectional schematic diagram of a portion of the structure of a current collector 520 provided in an embodiment of this application is shown.

[0166] In some implementations, such as Figure 8 As shown, a protruding structure 5211 is provided on the surface of the first wall 521 facing the heat exchange body 510. On a plane perpendicular to the thickness direction of the first wall 521, the protruding structure 5211 is arranged around the first through hole 524. A first groove 525 with an opening facing the heat exchange body 510 is formed between the protruding structure 5211 and the first wall 521. The first temperature-sensing deformation member 610 is accommodated in the first groove 525 and is fixedly connected to the inner wall of the first groove 525.

[0167] It should be understood that the shape of the protrusion structure 5211 on the plane perpendicular to the thickness direction of the first wall 521 can be set according to actual needs. For example, the shape of the protrusion structure 5211 can be a circular ring or a rectangular ring. It should also be understood that the shape of the protrusion structure 5211 on the plane perpendicular to the thickness direction of the first wall 521 can be a continuous shape or a discontinuous shape. For example, when the protrusion structure 5211 is set as a circular ring, the circular ring can be set as a continuous circular ring or a discontinuous circular ring.

[0168] It should also be understood that the end of the protruding structure 5211 facing the first wall 521 can be integrally formed or separately formed with the surface of the first wall 521 facing the heat exchange body 510. When the end of the protruding structure 5211 facing the first wall 521 is integrally formed with the surface of the first wall 521 facing the heat exchange body 510, the protruding structure 5211 and the first wall 521 are integrally injection molded. When the end of the protruding structure 5211 facing the first wall 521 is separately formed with the surface of the first wall 521 facing the heat exchange body 510, the protruding structure 5211 and the first wall 521 can be bonded or welded together.

[0169] It should also be understood that the opening formed between the protruding structure 5211 and the first wall 521 faces the bottom wall of the first groove 525 of the heat exchange body 510, which is the first wall 521, and the bottom wall of the first groove 525 includes the aforementioned first through hole 521. On a plane perpendicular to the thickness direction of the first wall 521, the shape of the first groove 525 can be set according to actual needs. The shape of the first groove 525 can be circular, elliptical, polygonal, rectangular, etc. For example, the shape of the first groove 525 can be matched to the shape of the first temperature-sensing deformation member 610. It should also be understood that the thickness of the sidewall of the first groove 525 in this embodiment can be set according to actual needs. For example, the thickness of the sidewall of the first groove 525 can be set to 2mm.

[0170] In this embodiment, a protruding structure 5211 is provided on the surface of the first wall 521 facing the heat exchange body 510. On a plane perpendicular to the thickness direction of the first wall 521, the protruding structure 5211 surrounds the first through hole 524. A first groove 525 with an opening facing the heat exchange body 510 is formed between the protruding structure 5211 and the first wall 521. The first temperature-sensing deformation member 610 is accommodated in the first groove 525 and fixedly connected to the inner wall of the first groove 525. This can limit and protect the first temperature-sensing deformation member 610, thereby reducing the risk of misalignment of the first temperature-sensing deformation member 610 during use and improving the performance of the first temperature-sensing deformation member 610, thus improving the heat dissipation performance of the battery device 10.

[0171] In some implementations, the surface of the first temperature-sensing deformable member 610 facing the heat exchange body 510 is flush with the surface of the first groove 525 facing the heat exchange body 510, or the surface of the first temperature-sensing deformable member 610 facing the heat exchange body 510 is lower than the surface of the first groove 525 facing the heat exchange body 510.

[0172] In this embodiment, by setting the surface of the first temperature-sensing deformable component 610 facing the heat exchange body 510 to be flush with the surface of the first groove 525 facing the heat exchange body 510, or by setting the surface of the first temperature-sensing deformable component 610 facing the heat exchange body 510 to be lower than the surface of the first groove 525 facing the heat exchange body 510, the first temperature-sensing deformable component 610 can be accommodated inside the first groove 525. This improves the limiting and protective effect of the first groove 525 on the first temperature-sensing deformable component 610, effectively reduces the risk of misalignment of the first temperature-sensing deformable component 610 during use, and improves the performance of the first temperature-sensing deformable component 610, thereby improving the heat dissipation performance of the battery device 10.

[0173] In some implementations, the first temperature-sensitive deformation component 610 is connected to the inner wall of the first groove 525 by one of the following methods: snap-fit ​​connection, welding connection, adhesive connection, or interference fit connection.

[0174] For example, the first temperature-sensitive deformation component 610 can be interference-fitted with the inner wall of the first groove 525, that is, there is a certain amount of interference between the first temperature-sensitive deformation component 610 and the inner wall of the first groove 525 on a plane perpendicular to the first direction, so that the first temperature-sensitive deformation component 610 can be tightly fitted to the inner wall of the first groove 525.

[0175] In this embodiment of the application, the first temperature-sensing deformation component 610 and the inner wall of the first groove 525 are connected by one of the following methods: snap-fit ​​connection, welding connection, adhesive connection or interference connection, so as to achieve a fixed connection between the first temperature-sensing deformation component 610 and the inner wall of the first groove 525. The connection method is simple and easy to process and manufacture.

[0176] In some implementations, the protruding structure 5211 is integrally formed with the first wall 521. For example, the protruding structure 5211 can be integrally injection molded with the first wall 521. Thus, in this embodiment, by integrally forming the protruding structure 5211 with the first wall 521, the structural strength between the protruding structure 5211 and the first wall 521 is improved. This enhances the limiting and protective effect of the first groove 525 on the first temperature-sensitive deformable component 610 when the first temperature-sensitive deformable component 610 is accommodated within the first groove 525 formed by the protruding structure 5211 and the first wall 521. This effectively reduces the risk of misalignment of the first temperature-sensitive deformable component 610 during use, thereby improving the performance of the first temperature-sensitive deformable component 610 and ultimately improving the heat dissipation performance of the battery device 10.

[0177] In some implementations, such as Figure 7 and Figure 8 As shown, the maximum dimension D1 of the first temperature-sensitive deformation component 610 perpendicular to the first direction satisfies: 2mm≤D1≤4mm.

[0178] For example, the maximum dimension D1 of the first temperature-sensitive deformation component 610 perpendicular to the first direction can be set to: 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, etc., or its value is within the range obtained by any combination of the above two values.

[0179] In this embodiment of the application, by setting the maximum dimension D1 of the first temperature-sensing deformation component 610 in the direction perpendicular to the first direction to 2mm≤D1≤4mm, the performance of the first temperature-sensing deformation component 610 in use and installation are taken into account, thereby improving the heat dissipation performance of the battery device 10.

[0180] Figure 9 A cross-sectional schematic diagram of a portion of the structure of a thermal management component 50 provided in another embodiment of this application is shown.

[0181] In some implementations, such as Figure 9 As shown, in the first direction, the maximum distance D2 between the end of the first temperature-sensing deformation member 610 near the heat exchange body 510 and the end of the heat exchange body 510 near the current collector 520 satisfies: 2mm≤D2≤4mm.

[0182] For example, in the first direction, the maximum distance D2 between the end of the first temperature-sensing deformation member 610 near the heat exchange body 510 and the end of the heat exchange body 510 near the current collector 520 can be set to: 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, etc., or its value is within the range obtained by any combination of the above two values.

[0183] In this embodiment of the application, in the first direction, by setting the maximum distance D2 between the end of the first temperature-sensing deformation member 610 near the heat exchange body 510 and the end of the heat exchange body 510 near the current collector 520 to satisfy: 2mm≤D2≤4mm, the heat exchange medium in the first receiving cavity 511 can smoothly flow into the second receiving cavity 522 through the first temperature-sensing deformation member 610 and the first through hole 524, so as to take into account both the performance of the thermal management component 50 and the manufacturing performance, thereby improving the heat dissipation performance of the battery device 10.

[0184] Figure 10 A cross-sectional schematic diagram of a portion of the structure of a current collector 520 provided in another embodiment of this application is shown.

[0185] In some implementations, such as Figure 10 As shown, the current collector 520 has an inlet 530 and an outlet 540 respectively on two opposite surfaces perpendicular to the first direction. The inlet 530 is used to allow the heat exchange medium to flow into the second receiving cavity 522, and the outlet 540 is used to allow the heat exchange medium to flow out of the second receiving cavity 522. The battery device 10 also includes a second temperature-sensing deformation member 620, which is fixedly connected to the inner wall of the inlet 530. The heat exchange medium flows into the second receiving cavity 522 through the second temperature-sensing deformation member 620.

[0186] It should be understood that the flow pipe 80 in this embodiment can be connected to the inlet 530 and the outlet 540. That is, the heat exchange medium can enter the second receiving cavity 522 through the inlet 530 and enter the first receiving cavity 511 through the first through hole 521. The heat exchange medium can also enter the second receiving cavity 522 through the inlet 530 and flow out of the second receiving cavity 522 through the outlet 540. Then the heat exchange medium enters the flow pipe 80 through the outlet 540.

[0187] It should also be understood that the second temperature-sensing deformable component 620 in this embodiment can deform according to the temperature change of the battery cell 20. For example, as the temperature of the battery cell 20 increases, it is necessary to improve the heat dissipation performance of the thermal management component 50. The second temperature-sensing deformable component 620 contracts as the temperature increases, so that the flow area of ​​the heat exchange medium on the plane perpendicular to the extension direction of the second temperature-sensing deformable component 620 increases, that is, the flow rate of the heat exchange medium flowing through the second temperature-sensing deformable component 620 increases, thereby improving the heat dissipation performance of the thermal management component 50. As the temperature of the battery cell 20 decreases, the second temperature-sensing deformable component 620 expands as the temperature decreases, so that the flow area of ​​the heat exchange medium on the plane perpendicular to the extension direction of the second temperature-sensing deformable component 620 decreases, that is, the flow rate of the heat exchange medium flowing through the second temperature-sensing deformable component 620 decreases.

[0188] It should also be understood that the shape of the second temperature-sensing deformable component 620 can be set according to actual needs. For example, the second temperature-sensing deformable component 620 can be set as a cylinder, square, or polygon. For example, in the flow direction of the heat exchange medium, that is, in the direction in which the heat exchange medium flows from the flow pipe 80 into the second receiving cavity 522 through the liquid inlet 540, the radial dimension of the second temperature-sensing deformable component 620 can gradually decrease, and the portion of the second temperature-sensing deformable component 620 away from the second receiving cavity 522 is interference-fitted with the inner wall of the liquid inlet 530.

[0189] It should also be understood that the second temperature-sensing deformable component 620 can be used to connect the flow pipe 80 and the second receiving cavity 522, that is, the heat exchange medium in the flow pipe 80 can flow into the second receiving cavity 522 through the second temperature-sensing deformable component 620.

[0190] It should also be understood that the second temperature-sensitive deformable component 620 can be connected to the inner wall of the liquid inlet 530 by one of the following methods: snap-fit ​​connection, welding connection, adhesive connection, or interference fit connection. In some implementations, the second temperature-sensitive deformable component 620 can be fixedly connected to the inner wall of the liquid outlet 540.

[0191] It should also be understood that the heat exchange medium in the flow pipe 80 can enter the second receiving cavity 522 through the second temperature-sensing deformation member 620 and communicate with the first receiving cavity 511 through the first through hole 524. The heat exchange medium in the flow pipe 80 can also enter the second receiving cavity 522 through the second temperature-sensing deformation member 620 and flow out of the second receiving cavity through the liquid outlet 540, and then enter the flow pipe 80.

[0192] In this embodiment, the current collector 520 in the thermal management component 50 is provided with an inlet 530 and an outlet 540 on two opposite surfaces perpendicular to the first direction. The inlet 530 is used for the heat exchange medium to flow into the second receiving cavity 522, and the outlet 540 is used for the heat exchange medium to flow out of the second receiving cavity 522. By fixing the second temperature-sensing deformable component 620 to the inside of the inlet 530, the heat exchange medium can flow into the second receiving cavity 522 through the second temperature-sensing deformable component 620. The second temperature-sensing deformable component 620 can adaptively adjust according to the temperature of the heat exchange medium, that is, the second temperature-sensing deformable component 620 can expand or contract according to the temperature change of the heat exchange medium to adjust the flow rate of the heat exchange medium entering the second receiving cavity 522 from the inlet 530, thereby reducing the temperature difference between different areas inside the battery device 10, improving the uniformity of the internal temperature distribution of the battery device 10 during heat dissipation, and thus improving the heat dissipation performance of the battery device 10.

[0193] In some implementations, such as Figure 10 As shown, the second temperature-sensing deformation component 620 is provided with a third through hole 621 that extends through the second temperature-sensing deformation component 620 along the flow direction of the heat exchange medium, and the third through hole 621 communicates with the second receiving cavity 522.

[0194] It should be understood that the shape of the third through hole 621 provided on the second temperature-sensing deformation component 620 can be set according to actual needs. On a plane perpendicular to the extension direction of the second temperature-sensing deformation component 620, the shape of the third through hole 621 can be circular, elliptical, polygonal, rectangular, etc.

[0195] In this embodiment, by providing a third through hole 621 inside the second temperature-sensing deformable component 620, which extends through the heat exchange medium along its flow direction and is connected to the second receiving cavity 522, the second temperature-sensing deformable component 620 can expand or contract according to the temperature change of the heat exchange medium to adjust the aperture of the third through hole 621. This allows for the regulation of the flow rate of the heat exchange medium entering the second receiving cavity 522 from the inlet 530 through the third through hole 621, thereby reducing the temperature difference between different areas inside the battery device 10, improving the uniformity of the internal temperature distribution during heat dissipation, and thus improving the heat dissipation performance of the battery device 10.

[0196] In some implementations, such as Figure 4 As shown, the battery device 10 also includes a high-voltage box 70 and a plurality of thermal management components 50, and the second temperature-sensing deformation component 620 is disposed on the thermal management component 50 on the side of the plurality of thermal management components 50 closest to the high-voltage box 70.

[0197] It should be understood that the high-voltage box 70 in this embodiment is located in the edge region of the battery device 10. This high-voltage box 70 can also be referred to as a high-voltage distribution box or a high-voltage battery management box. The high-voltage box 70 can be used to distribute the high voltage generated by the battery device 10 to different loads. The high-voltage box 70 can also provide safety protection functions, such as overvoltage protection, overcurrent protection, or short-circuit protection. It should also be understood that in some implementations, the high-voltage box 70 can integrate various sensors to monitor parameters such as voltage, current, or temperature in the battery device 10.

[0198] It should also be understood that the high-voltage box 70 in this embodiment is also provided with a high-voltage box water-cooling plate, which can be connected to the flow pipe 80. This reduces the flow rate of the heat exchange medium in the thermal management component 50 near the high-voltage box 70, resulting in differences in the heat dissipation performance of the thermal management component 50 in different areas of the entire battery device 10, i.e., a large temperature difference exists between different areas of the battery device 10. By setting the second temperature-sensing deformation component 620 on the thermal management component 50 near the high-voltage box 70, and by setting the second temperature-sensing deformation component 620 inside the liquid inlet 530 of the thermal management component 50, the flow rate of the heat exchange medium entering the second receiving cavity 522 from the liquid inlet 530 through the third through hole 621 is adjusted, so as to adjust the flow rate of the heat exchange medium in the thermal management component 50 near the high-voltage box 70, thereby improving the uniformity of the internal temperature distribution of the battery device 10.

[0199] In this embodiment, the battery device 10 further includes a high-voltage box 70 and a plurality of thermal management components 50. Because the flow rate of the heat exchange medium in the thermal management component 50 near the high-voltage box 70 differs significantly from that in the thermal management component 50 away from the high-voltage box 70, the temperature difference between different areas inside the battery device 10 is large during heat dissipation. By placing the second temperature-sensing deformable component 620 on the thermal management component 50 near the high-voltage box 70 and placing it inside the liquid inlet 530 of the thermal management component 50, the flow rate of the heat exchange medium entering the second receiving cavity 522 from the liquid inlet 530 through the third through-hole 621 is adjusted. This adjusts the flow rate of the heat exchange medium in the thermal management component 50 near the high-voltage box 70, effectively reducing the temperature difference between different areas inside the battery device 10, improving the uniformity of the internal temperature distribution during heat dissipation, and thus improving the heat dissipation performance of the battery device 10.

[0200] In some implementations, such as Figure 7 and Figure 8As shown, the maximum thickness D3 of the first temperature-sensitive deformation component 610 satisfies: 1mm≤D3≤2mm.

[0201] For example, in the first direction, the maximum thickness D3 of the first temperature-sensitive deformation member 610 can be set to: 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc., or its value is within the range obtained by any combination of the above two values.

[0202] In this embodiment of the application, by setting the maximum thickness D3 of the first temperature-sensing deformation component 610 to satisfy: 1mm≤D3≤2mm, the performance of the first temperature-sensing deformation component 610 in use and the manufacturing performance are taken into account, thereby improving the performance of the thermal management component 50 and thus improving the heat dissipation performance of the battery device 10.

[0203] In some implementations, such as Figure 7 and Figure 8 As shown, the outer diameter D4 of the first temperature-sensing deformation component 610 satisfies: 2mm≤D4≤30mm.

[0204] For example, in the first direction, the outer diameter D4 of the first temperature-sensitive deformation member 610 can be set to: 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 25mm, 30mm, etc., or its value is within the range obtained by any combination of the above two values.

[0205] In this embodiment of the application, by setting the outer diameter D4 of the first temperature-sensing deformation component 610 to satisfy: 2mm≤D4≤30mm, the performance of the first temperature-sensing deformation component 610 in use and the manufacturing performance are taken into account, thereby improving the performance of the thermal management component 50 and improving the heat dissipation performance of the battery device 10.

[0206] In some other implementations, the outer diameter D4 of the first temperature-sensitive deformation component 610 satisfies: 2mm≤D4≤4mm.

[0207] In other implementations, such as Figure 10 As shown, the maximum thickness D5 of the second temperature-sensing deformation component 620 in this embodiment can be set to: 1mm≤D5≤2mm.

[0208] In some implementations, the material of the first temperature-sensitive deformation component 610 includes at least one of the following materials: antimony, bismuth, polyethylene, polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, and nickel sulfide.

[0209] For example, the materials of the first temperature-sensitive deformation member 610 and / or the second temperature-sensitive deformation member 620 may include at least one of the following materials: antimony, bismuth, polyethylene, polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, and nickel sulfide.

[0210] It should also be understood that when the thermal management component 50 is provided with both the first temperature-sensing deformation component 610 and the second temperature-sensing deformation component 620, the materials of the first temperature-sensing deformation component 610 and the second temperature-sensing deformation component 620 may be the same or different. Specifically, the first temperature-sensing deformation component 610 and the second temperature-sensing deformation component 620 may be configured according to actual needs.

[0211] In this embodiment, the material of the first temperature-sensing deformable component 610 is set to include at least one of the following materials: antimony, bismuth, polyethylene, polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, and nickel sulfide. This allows the first temperature-sensing deformable component 610 to deform according to the temperature change of the heat exchange medium in the thermal management component 50, thereby adjusting the flow rate of the heat exchange medium flowing through the thermal management component 50. This effectively reduces the temperature difference between different areas inside the battery device 10, improves the uniformity of the internal temperature distribution of the battery device 10 during heat dissipation, and thus improves the heat dissipation performance of the battery device 10.

[0212] According to some embodiments of this application, this application also provides an electrical device, including the battery device 10 in any of the above embodiments, the battery device 10 being used to provide electrical energy to the electrical device. Specifically, the electrical device can be the above... Figure 1 The vehicle 1 shown can also be any electrical device that uses the battery device 10.

[0213] The power supply device can be any of the aforementioned devices or systems that utilize battery device 10.

[0214] According to some embodiments of this application, this application also provides an energy storage device, including the battery device 10 in any of the above embodiments, the battery device 10 being used to store electrical energy for the energy storage device.

[0215] According to some embodiments of this application, see Figures 4 to 10This application provides a battery device 10, which includes: a battery cell 20, a thermal management component 50, and a first temperature-sensing deformation component 610. The thermal management component 50 includes a heat exchange body 510 and a current collector 520. The heat exchange body 510 has a first receiving cavity 511 inside. The current collector 520 is connected to at least one end of the heat exchange body 510 along a first direction. The current collector 520 has a first wall 521 inside, which separates a second receiving cavity 522 and a third receiving cavity 523 inside the current collector 520. The opening of the third receiving cavity 523 faces the end of the heat exchange body 510 near the current collector 520. The first wall 521 is provided with a first through hole 524 extending along the first direction. The second receiving cavity 522 communicates with the third receiving cavity 523 through the first through hole 524. The thermal management component 50 is used to contain the heat exchange medium to regulate the temperature of the battery cell 20. The first direction is the extending direction of the heat exchange body 510. The first temperature-sensing deformation component 610 is used to regulate the flow rate of the heat exchange medium flowing between the first receiving cavity 511 and the second receiving cavity 522. The first temperature-sensing deformation component 610 is connected to the surface of the first wall 521 facing the heat exchange body 510. On a plane perpendicular to the first direction, the orthographic projection of the first temperature-sensing deformation component 610 covers the orthographic projection of the first through hole 524. The first temperature-sensing deformation member 610 is provided with a second through hole 611 extending through the first direction. The second through hole 611 communicates with the first through hole 524. On a plane perpendicular to the first direction, the orthographic projection of the second through hole 611 covers the orthographic projection of the first through hole 524. The surface of the first wall 521 facing the heat exchange body 510 is provided with a protruding structure 5211. On a plane perpendicular to the thickness direction of the first wall 521, the protruding structure 5211 surrounds the first through hole 524. A first groove 525 with an opening facing the heat exchange body 510 is formed between the protruding structure 5211 and the first wall 521. The first temperature-sensing deformation member 610 is accommodated in the first groove 525 and is fixedly connected to the inner wall of the first groove 525.

[0216] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery cell comprises: a battery cell; a heat management component, comprising a heat exchange body and a current collector, an inside of the heat exchange body is provided with a first accommodating cavity, the current collector is connected to at least one end of the heat exchange body in a first direction, an inside of the current collector is provided with a first wall body, the first wall body is used to separate a second accommodating cavity and a third accommodating cavity in the inside of the current collector, an opening of the third accommodating cavity is towards an end of the heat exchange body close to the current collector, the first wall body is provided with a first through hole penetrating in the first direction, the second accommodating cavity is communicated with the third accommodating cavity through the first through hole, the heat management component is used to accommodate a heat exchange medium to adjust a temperature of the battery cell, the first direction is an extension direction of the heat exchange body; a first temperature-sensing deformation component, the first temperature-sensing deformation component is used to adjust a flow of the heat exchange medium flowing between the first accommodating cavity and the second accommodating cavity.

2. The battery device according to claim 1, characterized by The first temperature-sensing deformation component is connected to a surface of the first wall body towards the heat exchange body, in a plane perpendicular to the first direction, a normal projection of the first temperature-sensing deformation component covers a normal projection of the first through hole.

3. The battery device of claim 2, wherein, The first temperature-sensing deformation component is provided with a second through hole penetrating the first temperature-sensing deformation component in the first direction, the second through hole is communicated with the first through hole, in a plane perpendicular to the first direction, a normal projection of the second through hole covers a normal projection of the first through hole.

4. The battery device of claim 1, wherein A surface of the first wall body towards the heat exchange body is provided with a protruding structure, in a plane perpendicular to a thickness direction of the first wall body, the protruding structure is arranged around the first through hole, a first groove with an opening towards the heat exchange body is formed between the protruding structure and the first wall body, the first temperature-sensing deformation component is accommodated in the first groove and is fixedly connected with an inner wall of the first groove.

5. The battery device of claim 4, wherein, A surface of the first temperature-sensing deformation component towards the heat exchange body is flush with a surface of the first groove towards the heat exchange body, or, the surface of the first temperature-sensing deformation component towards the heat exchange body is lower than the surface of the first groove towards the heat exchange body.

6. The battery device of claim 4, wherein The first temperature-sensing deformation component and the inner wall of the first groove are connected by one of the following manners: clamping connection, welding connection, adhesive connection or interference fit connection.

7. The battery device of claim 4, wherein The protruding structure is integrally formed with the first wall body.

8. The battery device according to any one of claims 1 to 7, characterized by, A maximum dimension D1 of the first temperature-sensing deformation component in a direction perpendicular to the first direction satisfies: 2mm≤D1≤4mm.

9. The battery device according to any one of claims 1 to 7, characterized by, In the first direction, a maximum distance D2 between an end of the first temperature-sensing deformation component close to the heat exchange body and an end of the heat exchange body close to the current collector satisfies: 2mm≤D2≤4mm.

10. The battery device according to any one of claims 1 to 7, characterized by, Two opposite surfaces of the current collector in a direction perpendicular to the first direction are respectively provided with an inlet and an outlet, the inlet is used for the heat exchange medium to flow into the second accommodating cavity, and the outlet is used for the heat exchange medium to flow out of the second accommodating cavity; The battery device further comprises a second temperature-sensing deformation component fixedly connected with an inner wall of the liquid inlet, and the heat exchange medium flows into the second accommodating cavity through the second temperature-sensing deformation component.

11. The battery device of claim 10, wherein, The second temperature-sensing deformation component is provided with a third through hole penetrating through the second temperature-sensing deformation component along the flow direction of the heat exchange medium, and the third through hole is in communication with the second accommodating cavity.

12. The battery device of claim 10, wherein, The battery device further comprises a high-voltage box and a plurality of heat management components, and the second temperature-sensing deformation component is arranged on a heat management component close to the high-voltage box among the plurality of heat management components.

13. The battery device according to any one of claims 1 to 7, characterized by, The maximum thickness D3 of the first temperature-sensing deformation component satisfies 1mm≤D3≤2mm.

14. The battery device according to any one of claims 1 to 7, characterized by, The material of the first temperature-sensing deformation component comprises at least one of antimony, bismuth, polyethylene, polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, and nickel sulfide.

15. An electrical device, comprising: Comprising: The battery device according to any one of claims 1 to 14, wherein the battery device is configured to provide electrical energy to the electrical device.

16. An energy storage device, comprising: Comprising: The battery device according to any one of claims 1 to 14, wherein the battery device is configured to store electrical energy for the energy storage device.

Images