Battery device and electric equipment

Abstract

The invention discloses a battery device and electric equipment, the battery device comprises a box body, a battery monomer assembly and a heat exchange assembly, the battery monomer assembly is arranged in the box body, the heat exchange assembly is arranged outside the box body and comprises a heating piece and a heat exchange piece, the heating piece is connected with the outer surface of the box body and can at least heat the battery monomer assembly, and the heat exchange piece is arranged in the box body. The heat exchange piece is connected with at least one of the outer surface of the box body and the heating piece, and the heat exchange piece is at least used for cooling the battery monomer assembly. The heat exchange assembly is arranged outside the box body, the heating piece is used for heating the battery monomer assembly in the box body, and the heat exchange piece is used for cooling the battery monomer, so that the temperature of the battery monomer assembly is adjusted, and the battery monomer assembly can be maintained at the optimal working temperature. According to the battery device, the heat exchange assembly is arranged outside the box body, so that the occupation of the internal space of the box body is reduced, the space utilization rate of the box body is improved, and the energy density of the battery device can be improved.

Description

Technical Field

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

[0002] With the development of new energy, more and more fields are using new energy as a power source. Due to its advantages such as high energy density, rechargeable, safe and environmentally friendly, battery devices are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields.

[0003] In the related art, the battery device includes a box, a heat exchange assembly and a plurality of battery cells, and the plurality of battery cells and the heat exchange assembly are respectively arranged in the box. However, the space utilization rate of the box is low, which is not conducive to improving the energy density of the battery device. Summary of the invention

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which solves the problem of low space utilization of the box of the existing battery device.

[0005] A first aspect of the present application provides a battery device, the battery device comprising: Box; A battery monomer assembly, wherein the battery monomer assembly is arranged in the box; A heat exchange component is arranged outside the box and includes a heating element and a heat exchange element. The heating element is connected to the outer surface of the box and can at least heat the battery cell assembly. The heat exchange element is connected to the outer surface of the box and at least one of the heating element. The heat exchange element is at least used to cool the battery cell assembly.

[0006] Specifically, the heat exchange assembly is arranged outside the box, and the battery cell assembly in the box is heated by the heating element, and the battery cell is cooled by the heat exchange element, thereby adjusting the temperature of the battery cell assembly so that the battery cell assembly can be maintained at an optimal working temperature. By arranging the heat exchange assembly outside the box, the occupation of the internal space of the box is reduced, so that the space utilization rate of the box is effectively improved, thereby improving the energy density of the battery device.

[0007] In some embodiments of the present application, the box includes a first box and a second box, and the first box is connected to the second box in a cover-joined manner; The heat exchange component is arranged on the side of the first box away from the second box and exchanges heat with the battery monomer assembly through the first box, or the heat exchange component is arranged on the side of the second box away from the first box and exchanges heat with the battery monomer assembly through the second box.

[0008] Specifically, the box body is arranged as a combination structure of a first box body and a second box body, which improves the convenience of the box body processing process and also improves the convenience of the battery device assembly process, so that the assembly efficiency is effectively improved.

[0009] In some embodiments of the present application, the first box is disposed on the top of the second box, and the heat exchange assembly is disposed on a side of the second box away from the first box; Among them, the connection method between the heating element and the second box body is bonding, welding, clamping or connection via a connecting piece, and the connection method between the heat exchange element and the second box body and / or the heating element is bonding, welding, clamping or connection via a connecting piece.

[0010] Such an arrangement can reduce the space occupied by the heat exchange assembly on the top of the outer side of the box body, and facilitate the layout and installation of the battery device when the battery device is used in electrical equipment.

[0011] In some embodiments of the present application, the heat exchange assembly further includes a protective member, which is disposed on a side of the heat exchange member away from the second box, and is connected to at least one of the second box, the heating member, and the heat exchange member, and the protective member shields at least a portion of the heat exchange member and at least a portion of the heating member. In this way, the protective member can be used to protect the heating member and the heat exchange member, thereby reducing the occurrence of damage to the heat exchange member and the heating member due to external impact.

[0012] In some embodiments of the present application, the protective member is connected to the second box and encloses a storage space with the second box, the heating element and at least part of the heat exchange element are arranged in the storage space, and the protective member and the second box are connected by bonding, welding, clamping or connection via a connecting member. In this way, the protective member can fully shield the heating element and the heat exchange element, thereby improving the protection effect of the heat exchange element and the heating element.

[0013] In some embodiments of the present application, the heat exchange assembly further includes a first seal, which is disposed between the protective element and the second housing and seals the interface between the protective element and the second housing. This arrangement can improve the sealing of the interface and reduce the adverse effects of the external environment on the heating element and the heat exchange element.

[0014] In some embodiments of the present application, the first sealing member is a sealing gasket or a sealing adhesive. Such a configuration can facilitate assembly and effectively reduce manufacturing costs.

[0015] In some embodiments of the present application, the heat exchange assembly further includes a support member, which is disposed on a side of the protective member facing the second box body, one side of the support member abuts against the heating member and / or the heat exchange member, and the other side of the support member abuts against the protective member.

[0016] Such an arrangement can provide effective support for the heating element and the heat exchange element, thereby improving the stability of the structure.

[0017] In some embodiments of the present application, the support member is in contact with the protective member, the heat exchange member forms a first projection on the protective member, the support member forms a second projection on the protective member, the shape of the first projection is consistent with the shape of the second projection, and the first projection is within the range of the second projection. Such an arrangement can reduce the volume of the support member, which can not only reduce the manufacturing cost, but also reduce the overall quality of the battery device.

[0018] In some embodiments of the present application, the support member is a flexible member. In this way, the flexibility of the support member can be used to absorb external impact forces, thereby reducing the possibility of damage to the heating element and the heat exchange element.

[0019] In some embodiments of the present application, the heating element includes a heating body, and the heating body is a metal part or a non-metal part. In this way, the heating element can be configured as needed, thereby increasing the application range of the heating element.

[0020] In some embodiments of the present application, the battery device further includes a plurality of electrical connection components, the plurality of electrical connection components are mounted on the box body, the heating element is an electric heating structure, and the heating element is electrically connected to the battery cell assembly through an electrical connection component. Such an arrangement facilitates the electrical connection between the heating element and the battery cell assembly, thereby improving the convenience of assembly.

[0021] In some embodiments of the present application, the box body is provided with vias having the same number as the electrical connection components, and each electrical connection component includes: A mounting base, the mounting base is connected to the box body and closes the via hole; The needle row is installed on the mounting base and is located where the via hole is located. The needle row includes a plurality of needle bodies. The first end of each needle body protrudes from the inside of the box and is electrically connected to the battery cell assembly, and the second end of the needle body protrudes from the outside of the box and is electrically connected to the heating element.

[0022] Such an arrangement facilitates electrical connection between the heating element and the battery cell assembly, thereby improving the convenience of assembly.

[0023] In some embodiments of the present application, the electrical connection assembly further includes a second seal, which is disposed between the mounting seat and the box body, and the second seal seals the interface between the mounting seat and the box body. This arrangement improves the sealing performance of the box body and reduces the adverse effects of external environmental factors on the internal components of the box body.

[0024] In some embodiments of the present application, the second sealing member is a sealing gasket or a sealing adhesive. Such a configuration can facilitate assembly and effectively reduce manufacturing costs.

[0025] In some embodiments of the present application, the connection between the mounting base and the box body includes bonding, welding, clamping or connection via a connector. In this way, the connection method can be set according to the needs of use, thereby increasing the application range of the battery device.

[0026] In some embodiments of the present application, the battery device further includes a control device and a heating circuit, the heating circuit is electrically connected to the battery cell assembly, the heating element is connected to the heating circuit through at least one electrical connection assembly, the heating circuit includes a current detection element, the current detection element is used to detect the current in the heating circuit, and the control device is electrically connected to the current detection element and is used to control the on and off of the heating circuit. Such an arrangement can improve the safety performance of the battery device.

[0027] In some embodiments of the present application, the heating circuit further includes a fuse component, which is configured to be blown when the current of the heating circuit exceeds a preset current to disconnect the heating circuit. This configuration can further improve the safety performance of the battery device.

[0028] In some embodiments of the present application, the heating element is a plate-shaped element, and the power density of the heating element is 0.8 W / cm 2 ~1.5W / cm 2 Such an arrangement enables the heating element to fully meet the heating requirements of the battery cell assembly.

[0029] In some embodiments of the present application, the heating element is a plate-shaped element, and the flatness of the heating element is greater than or equal to 0 mm and less than or equal to 5 mm. Such a configuration can increase the contact area between the heating element and the box, thereby improving the heat exchange efficiency of the heating element to the battery cell assembly.

[0030] In some embodiments of the present application, the heat exchange element includes a medium flow channel, and the medium flow channel is used to accommodate the heat exchange medium. Such an arrangement can improve the heat exchange effect of the heat exchange element on the battery monomer assembly.

[0031] In some embodiments of the present application, the heat exchange assembly further includes a current collector, which is connected to the heat exchange member, and the current collector includes a current collector body, which includes a first channel and a second channel spaced apart from each other, one end of the medium flow channel is connected to the first channel and is used for the heat exchange medium to flow in, and the other end of the medium flow channel is connected to the second channel and is used for the heat exchange medium to flow out. This arrangement facilitates the heat exchange medium to circulate in the medium flow channel of the heat exchange member, and the heat exchange efficiency of the battery cell assembly is improved by the circulation of the heat exchange medium.

[0032] In some embodiments of the present application, the current collector also includes a liquid inlet joint and a liquid outlet joint, the liquid inlet joint is connected to the current collector body and communicates with the first channel, and the liquid outlet joint is connected to the current collector body and communicates with the second channel. This arrangement facilitates connection with an external heat exchange medium circulation system, thereby improving the convenience of connection.

[0033] In some embodiments of the present application, the battery device further includes a control device and a temperature detection element, the temperature detection element is electrically connected to the control device through an electrical connection component, and the temperature detection element is at least used to detect the temperature of the heat exchange medium at the current collector position. In this way, the temperature of the heat exchange medium can be effectively obtained, and whether the heat exchange medium is circulated can be controlled according to the temperature of the heat exchange medium.

[0034] In some embodiments of the present application, the heat exchange component also includes a protective member, which is arranged on the side of the heat exchange component away from the second box body and is connected to the second box body. The battery device also includes a leakage detection element, which is electrically connected to the control device through an electrical connection component. The leakage detection element is at least used to detect whether there is leaked heat exchange medium on the protective member.

[0035] Such an arrangement enables monitoring of whether the heat exchange medium is leaking, further improving the safety performance of the battery device.

[0036] In some embodiments of the present application, the heat exchange element is a plate-shaped element or a tubular element. In this way, the heat exchange element can be configured according to the usage scenario, so that the application range of the heat exchange element is expanded.

[0037] In some embodiments of the present application, the heat exchange element is a tubular element, and the tubular element is a curved structure in the same plane. Such a configuration can increase the length of the heat exchange element, thereby increasing the heat exchange time between the heat exchange element and the battery cell, thereby improving the heat exchange effect on the battery cell assembly.

[0038] In some embodiments of the present application, the wall thickness of the tubular member is in the range of 0.3 mm to 2 mm. This arrangement allows the heat exchange member to have sufficient structural strength while reducing the mass of the heat exchange member, thereby reducing the overall mass of the battery device.

[0039] In some embodiments of the present application, the flatness of the heating element is greater than or equal to 0 mm and less than or equal to 5 mm. This arrangement can increase the contact area between the heating element and the box, thereby improving the heat exchange efficiency of the heating element to the battery cell assembly.

[0040] In some embodiments of the present application, the heat exchanger is a metal part, and an insulating coating is provided on the outer surface of the heat exchanger, and the insulating coating is used to insulate the heat exchanger. Such a configuration can effectively improve the heat exchange performance of the heat exchanger, and at the same time can reduce the short circuit between the heat exchanger and other components, so that the safety performance of the battery device is improved.

[0041] In some embodiments of the present application, the heat exchanger is a copper part, an aluminum alloy part or a stainless steel part. In this way, the heat exchanger can be configured as needed, thereby increasing the application range of the heat exchanger.

[0042] In some embodiments of the present application, the heating element is a plate-shaped element, the heating element is connected to the side of the second box away from the first box through the first thermal conductive adhesive, and the heating element is connected to the side of the heating element away from the second box through the second thermal conductive adhesive. This arrangement can improve the connection strength, thereby improving the stability of the structure.

[0043] In some embodiments of the present application, along the arrangement direction of the heating element and the second box, the size of the first thermal conductive adhesive is in the range of 0.1 mm to 3 mm. Such an arrangement can further improve the structural strength of the connection position, so that the structural stability is effectively improved.

[0044] In some embodiments of the present application, along the arrangement direction of the heating element and the second box, the size of the second thermally conductive adhesive is in the range of 0.1 mm to 3 mm. This arrangement can further improve the structural strength of the connection position, so that the structural stability is effectively improved.

[0045] In some embodiments of the present application, the heating element is a plate-shaped element, a relief structure is provided on the heating element, the heating element is connected to the side of the second box away from the first box through a first thermally conductive adhesive, at least part of the heat exchange element is embedded in the relief structure, and is connected to the side of the second box away from the first box through a second thermally conductive adhesive at the position of the relief structure. With such a configuration, the size of the first box and the second box can be reduced in the arrangement direction, thereby reducing the overall volume of the battery device.

[0046] In some embodiments of the present application, along the arrangement direction of the heating element and the second box, the size of the first thermal conductive adhesive is in the range of 0.1 mm to 3 mm. Such an arrangement can further improve the structural strength of the connection position, so that the structural stability is effectively improved.

[0047] In some embodiments of the present application, along the arrangement direction of the heating element and the second box, the size of the second thermally conductive adhesive is in the range of 0.1 mm to 3 mm. This arrangement can further improve the structural strength of the connection position, so that the structural stability is effectively improved.

[0048] A second aspect of the present application provides an electrical device, which includes the battery device as described above.

[0049] In the battery device of the electric equipment, the heat exchange component is arranged outside the box, and the battery monomer component in the box is heated by the heating element, and the battery monomer is cooled by the heat exchange component, thereby adjusting the temperature of the battery monomer component so that the battery monomer component can be maintained at an optimal working temperature. By arranging the heat exchange component outside the box, the occupation of the internal space of the box is reduced, so that the space utilization rate of the box is effectively improved, and the energy density of the battery device can be improved.

[0050] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of the present application is shown schematically; Figure 2 Schematically shows a structural diagram of a battery device according to an embodiment of the present application; Figure 3 for Figure 2 A partial structural schematic diagram of a battery device shown in ; Figure 4 for Figure 3 The heat exchange assembly shown in is a schematic diagram of the structure of some embodiments; Figure 5 for Figure 3 The heat exchange assembly shown in is a schematic diagram of the structure of some embodiments; Figure 6 for Figure 3 A partial structural schematic diagram of the electrical connection assembly shown in FIG. 1 being assembled to the second box; Figure 7 for Figure 6 A schematic structural diagram of another perspective of the structure shown in FIG. Figure 8 for Figure 7 A partial structural schematic diagram of the electrical connection assembly shown in FIG.

[0052] The reference numerals are as follows: 1000. Vehicles; 100, battery device; 200, controller; 300, motor; 110. Battery monomer assembly; 10. Battery cells; 120, box body; 121, first box; 122, second box; 20. Heat exchange components; 21. Protective element; 22. Heat exchange element; 23. Heating element; 231. Avoidance structure; 30. Electrical connection components; 31. mounting seat; 32. needle row; 321. needle body; 33. second sealing member; 40. Current collecting parts; 41. Liquid inlet connector; 42. Current collector; 43. Liquid outlet connector; 50. Bolts. DETAILED DESCRIPTION

[0053] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0055] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0056] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0057] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0058] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0059] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0060] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0061] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of battery devices, the market demand is also constantly expanding.

[0062] In the related art, the battery device includes a box, a heat exchange assembly and a plurality of battery cells, and the plurality of battery cells and the heat exchange assembly are respectively arranged in the box. However, the space utilization rate of the box is low, which is not conducive to improving the energy density of the battery device.

[0063] In the present application, the battery device includes a housing, a battery cell assembly and a heat exchange assembly. The battery cell assembly is arranged in the housing, and the heat exchange assembly is arranged outside the housing and includes a heating element and a heat exchange element. The heating element is connected to the outer surface of the housing and can at least heat the battery cell assembly. The heat exchange element is connected to at least one of the outer surface of the housing and the heating element, and the heat exchange element is used to cool the battery cell assembly. The heat exchange assembly is arranged outside the housing, and the battery cell assembly in the housing is heated by the heating element, and the battery cell is cooled by the heat exchange element, thereby adjusting the temperature of the battery cell assembly so that the battery cell assembly can be maintained at an optimal operating temperature. By arranging the heat exchange assembly outside the housing, the occupation of the internal space of the housing is reduced, so that the space utilization rate of the housing is effectively improved, and the energy density of the battery device can be improved.

[0064] The technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0065] For example, Figure 1 As shown, it is a structural schematic diagram of a vehicle of one embodiment of the present application. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 300, a controller 200 and a battery device 100 can be arranged inside the vehicle, and the controller 200 is used to control the battery device 100 to power the motor 300. For example, a battery device 100 can be arranged at the bottom, front or rear of the vehicle. The battery device 100 can be used to power the vehicle. For example, the battery device 100 can be used as an operating power source for the vehicle, for the circuit system of the vehicle, for example, for the working power requirements during the start-up, navigation and operation of the vehicle. In another embodiment of the present application, the battery device 100 can not only be used as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0066] The battery apparatus 100 mentioned in the embodiment of the present application may include one or more battery cell assemblies 110 for providing voltage and capacity. The battery cell assembly 110 may include a plurality of battery cells 10, and the plurality of battery cells 10 are connected in series, in parallel or in mixed connection through a busbar component.

[0067] In some embodiments, a battery cell assembly 110 is generally formed by arranging a plurality of battery cells 10 .

[0068] As an example, the battery cell assembly 110 may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 10 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 10 by a cable tie.

[0069] In some embodiments, Figure 2 As shown, the battery device 100 may be a battery pack, which includes a case 120 and one or more battery cell assemblies 110 , wherein the battery cell assemblies 110 are accommodated in the case 120 .

[0070] As an example, the battery cell assembly 110 may be a battery module, and the battery cell assembly 110 may be accommodated in the case 120 by fixing the battery module in the case 120 .

[0071] As an example, the battery cell assembly 110 may also be accommodated in the case 120 by directly fixing the plurality of battery cells 10 to the case 120 .

[0072] As an example, the box 120 may include a first box 121 and a second box 122. The first box 121 and the second box 122 are buckled together to form a closed space inside the box 120 to accommodate the battery cell assembly 110. The closed space here means covered or closed, which may be sealed or unsealed. The first box 121 may be a top cover or a bottom plate.

[0073] As an example, the box body 120 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body 120 to accommodate the battery cell assembly 110.

[0074] In some embodiments, the box 120 can be used as a part of the chassis structure of the vehicle. For example, part of the box 120 can become at least a part of the floor of the vehicle, or part of the box 120 can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0075] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells 10, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0076] In some embodiments of the present application, the battery cell 10 may be a secondary battery. A secondary battery refers to a battery cell 10 that can be continuously used by activating active materials by charging after the battery cell 10 is discharged.

[0077] The battery cell 10 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0078] In some embodiments of the present application, the battery cell 10 includes a shell, a pressure relief mechanism, an electrode assembly and an insulating member. The shell includes multiple side walls, including a first side wall. A pressure relief mechanism is provided on the first side wall. The pressure relief mechanism is configured to open or close according to whether the internal pressure of the shell reaches a pressure threshold. The electrode assembly is arranged inside the shell, and the insulating member is arranged inside the shell and between the shell and the electrode assembly for insulating and isolating the shell and the electrode assembly. The insulating member abuts against the electrode assembly.

[0079] As an example, the battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in the present application.

[0080] The electrode assembly includes a positive electrode, a negative electrode, and a separator, and the separator is arranged between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell 10, active ions (such as lithium ions) are inserted and removed back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow the active ions to pass through.

[0081] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet 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.

[0082] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0083] As an example, the positive electrode current collector may be a metal foil, a conductive polymer material, a carbon material or a composite current collector. For example, as the metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, titanium or silver, etc., may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0084] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also referred to as NCM 333 )、LiNi 0.5 Co 0.2 Mn 0.3 O2 (also referred to as NCM 523 )、LiNi 0.5 Co 0.25 Mn 0.25 O2 (also referred to as NCM 211 )、LiNi 0.6 Co 0.2 Mn 0.2 O2 (also referred to as NCM 622 )、LiNi 0.8 Co 0.1 Mn 0.1 O2 (also referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.8 Co 0.15 Al 0.05 O2) and at least one of its modified compounds. The modified compound refers to a substance obtained by modifying the above substances by means of doping or coating.

[0085] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a foamed nickel, a foamed copper, a foamed aluminum, a foamed alloy, or a foamed carbon. When the foamed metal is used as the positive electrode, the positive electrode active material may not be disposed on the surface of the foamed metal, but of course, the positive electrode active material may also be disposed. As an example, the positive electrode active material is filled or / and deposited in the foamed metal.

[0086] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0087] As an example, the negative electrode current collector may be a metal foil, a conductive polymer material, a carbon material or a composite current collector. For example, as the metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, titanium or silver, etc., may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0088] 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.

[0089] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0090] As an example, the negative electrode active material may adopt the negative electrode active material for the battery cell 10 known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for the battery cell 10 may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0091] In some embodiments, the negative electrode may be a foam metal. The foam metal may be foam nickel, foam copper, foam aluminum, foam alloy, or foam carbon, etc. When the foam metal is used as the negative electrode sheet, the surface of the foam metal may not be provided with a negative electrode active material, but of course, a negative electrode active material may also be provided.

[0092] As an example, a negative electrode active material may be filled and / or deposited in the negative electrode current collector.

[0093] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0094] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0095] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0096] 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 special restrictions. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without special restrictions. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be coated on the surface of the separator.

[0097] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0098] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0099] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0100] In some embodiments, the electrode assembly is a laminate structure.

[0101] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0102] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0103] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0104] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0105] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0106] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0107] In some embodiments, the electrode sheet of the electrode assembly is provided with a tab, which can lead current out of the electrode assembly. The tab includes a positive tab and a negative tab.

[0108] In some embodiments, a pressure relief mechanism is disposed on the housing to discharge the internal gas of the battery cell 10 .

[0109] As an example, when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold, it is actuated to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode sheet, negative electrode sheet, electrolyte and separator in the battery cell 10.

[0110] As an example, the pressure relief mechanism may be integrally formed with the housing.

[0111] As an example, the pressure relief mechanism may also be separately provided and connected to the housing.

[0112] The "actuation" mentioned in this application means that the pressure relief mechanism is in action or activated to a certain state, so that the internal pressure and temperature of the battery cell 10 can be released. The action produced by the pressure relief mechanism may include but is not limited to: the components in the pressure relief mechanism move to form an exhaust channel, at least a part of the pressure relief mechanism ruptures, breaks, is torn or opened, etc. When the pressure relief mechanism is actuated, the high-temperature and high-pressure substances inside the battery cell 10 will be discharged from the actuated part as emissions. In this way, the battery cell 10 can be depressurized and cooled under controllable pressure or temperature, thereby reducing the potential for more serious accidents.

[0113] In some embodiments, when the outer shell is a non-sealed structure, the pressure relief mechanism can be set as a through hole to discharge the gas inside the battery cell 10.

[0114] The emissions from the battery cells 10 mentioned in the present application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode sheets, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, and the like.

[0115] The positive electrode tab and the negative electrode tab can be led out from the same end of the electrode sheet, or can be led out from opposite ends of the electrode sheet respectively.

[0116] The structures of the positive electrode tab and the negative electrode tab may be the same or different. Taking the positive electrode tab as an example, the positive electrode tab may include multiple positive electrode tab layers, and multiple positive electrode tab layers are stacked together to form the positive electrode tab. The positive electrode tab may include at least two parts, one part is located between the main body of the pole piece and the insulating member, and the other part is located between the insulating member and the electrode lead-out member.

[0117] The insulating member can insulate at least part of the pole ear from the end face of the main body, thereby reducing the risk of the pole ear being inserted into the main body when the battery cell 10 is affected by external impact, vibration, etc., thereby reducing the risk of short circuit of the battery cell 10, which is beneficial to improving the reliability of the battery cell 10.

[0118] The insulating member may be an integral structure or a split structure. As an example, the insulating member is formed by connecting a plurality of independently formed parts. As another example, the insulating member is integrally formed by stamping.

[0119] For example, the insulating part is a plastic part, and the insulating part which is a plastic part is integrally formed by injection molding. The processing of the plastic part is convenient, and the manufacturing cost of the plastic part is low.

[0120] In some embodiments of the present application, the housing includes a shell and an end cover, the shell has an opening, the end cover is connected to the shell and closes the opening, the end cover constitutes a first side wall, and the pressure relief mechanism is arranged on the end cover.

[0121] In some embodiments of the present application, the shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film, etc. In some embodiments, the shell may be a sealed structure or a non-sealed structure. As an example, when the shell is a non-sealed structure, the shell plays a role in protecting the electrode assembly, and a sealed bag is also included between the shell and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag may be a bag-shaped insulating member or an aluminum-plastic film. When the shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0122] In addition, the connection methods between the end cover and the shell include but are not limited to snap connection, bonding, welding or connection via a connector.

[0123] In some embodiments of the present application, the battery cell 10 further includes an electrode terminal, which is disposed on the end cap and electrically connected to the electrode assembly. The electrode terminal is electrically connected to the pole tab of the electrode assembly. The electrode terminal may be directly connected to the pole tab or indirectly connected to the pole tab through a current collecting member. The electrode terminal may be disposed on the end cap or on the housing. In the embodiment shown in the present application, the electrode terminal is disposed on the end cap.

[0124] like Figures 2 to 8As shown, in some embodiments of the present application, a battery device 100 is proposed, including a case 120, a battery cell assembly 110 and a heat exchange assembly 20. The battery cell assembly 110 is disposed in the case 120, and the heat exchange assembly 20 is disposed outside the case 120 and includes a heating element 23 and a heat exchange element 22. The heating element 23 is connected to the outer surface of the case 120 and can at least heat the battery cell assembly 110. The heat exchange element 22 is connected to the outer surface of the case 120 and at least one of the heating element 23. The heat exchange element 22 is at least used to cool the battery cell assembly 110.

[0125] Specifically, the battery cell assembly 110 is arranged inside the box body 120, and the battery cell assembly 110 includes multiple battery cells 10. Each battery cell 10 is thermally connected to the box body 120, wherein the thermally conductive connection means that the box body 120 and the battery cell 10 can conduct heat, that is, heat transfer can be carried out between the box body 120 and the battery cell 10.

[0126] When the heat exchange assembly 20 is in operation, one of the heating element 23 and the heat exchange element 22 is in operation while the other stops operating, that is, when the heating element 23 is in operation, the heat exchange element 22 stops operating, and vice versa, when the heating element 23 stops operating, the heat exchange element 22 is in operation.

[0127] The heating element 23 is connected to the outer surface of the box body 120. When the heating element 23 is running, the heating element 23 transfers heat to the battery cell 10 in the battery cell assembly 110 through the box body 120 to heat the battery cell 10, thereby increasing the temperature of the battery cell 10 and allowing the battery cell 10 to reach an optimal operating temperature.

[0128] At least one of the outer surface of the housing 120 and the heating element 23 is connected to the heat exchange element 22, which means that the heat exchange element 22 may be connected only to the outer surface of the housing 120, the heat exchange element 22 may be connected only to the heating element 23, or the heat exchange element 22 may be connected to the outer surface of the housing 120 and the heating element 23 respectively. When the heat exchange element 22 is in operation, the heat exchange element 22 can transfer heat through the components connected thereto, thereby cooling the battery cells 10 in the battery cell assembly 110, thereby reducing the temperature of the battery cells 10, so that the battery cells 10 reach the optimal operating temperature.

[0129] In the present application, the heat exchange assembly 20 is arranged outside the box 120, and the battery cell assembly 110 in the box 120 is heated by the heating element 23, and the battery cell 10 is cooled by the heat exchange element 22, thereby adjusting the temperature of the battery cell assembly 110, so that the battery cell assembly 110 can be maintained at an optimal working temperature. By arranging the heat exchange assembly 20 outside the box 120, the occupation of the internal space of the box 120 is reduced, so that the space utilization rate of the box 120 is effectively improved, and the energy density of the battery device 100 can be improved.

[0130] In some embodiments of the present application, Figure 2 As shown, the box 120 includes a first box 121 and a second box 122, and the first box 121 is connected to the second box 122. The heat exchange assembly 20 is arranged on a side of the first box 121 away from the second box 122 and exchanges heat with the battery cell assembly 110 through the first box 121.

[0131] Specifically, dividing the box body 120 into two parts, namely, a first box body 121 and a second box body 122 , can reduce the difficulty in the manufacturing process of the box body 120 , thereby improving the processing efficiency of the box body 120 .

[0132] In addition, the box body 120 is divided into two parts, namely the first box body 121 and the second box body 122, so as to facilitate the assembly of components such as the battery cell assembly 110 into the interior of the box body 120, thereby improving the convenience of assembly, improving the efficiency of assembly, and thus speeding up the production rhythm.

[0133] In addition, the first box 121 is a good conductor of heat, that is, the first box 121 can effectively transfer heat. When the heat exchange assembly 20 is arranged on the side of the first box 121 away from the second box 122, when the heat exchange assembly 20 exchanges heat with the battery cell assembly 110, the heat exchange assembly 20 exchanges heat with the battery cell assembly 110 through the first box 121 to achieve heat transfer, thereby achieving temperature adjustment of the battery cell assembly 110.

[0134] It should be pointed out that, in the present application, the second box body 122 may be a galvanized steel plate, and the structure of the second box body 122 is processed by stamping, so that the second box body 122 meets the anti-corrosion requirements.

[0135] In addition, the second box body 122 can also be treated with anti-corrosion according to different usage scenarios. For example, electrophoresis process, powder spraying process, electrophoresis + powder spraying, etc. can be selected, and the surface spraying material is mainly epoxy paint, etc.

[0136] In some embodiments of the present application, Figure 2 and Figure 3As shown, the box 120 includes a first box 121 and a second box 122, and the first box 121 is connected to the second box 122. The heat exchange assembly 20 is arranged on a side of the second box 122 away from the first box 121 and exchanges heat with the battery cell assembly 110 through the second box 122.

[0137] Specifically, dividing the box body 120 into two parts, namely, a first box body 121 and a second box body 122 , can reduce the difficulty in the manufacturing process of the box body 120 , thereby improving the processing efficiency of the box body 120 .

[0138] In addition, the box body 120 is divided into two parts, namely the first box body 121 and the second box body 122, so as to facilitate the assembly of components such as the battery cell assembly 110 into the interior of the box body 120, thereby improving the convenience of assembly, improving the efficiency of assembly, and thus speeding up the production rhythm.

[0139] In addition, the second box 122 is a good conductor of heat, that is, the second box 122 can effectively transfer heat. When the heat exchange assembly 20 is arranged on the side of the second box 122 away from the first box 121, when the heat exchange assembly 20 exchanges heat with the battery cell assembly 110, the heat exchange assembly 20 exchanges heat with the battery cell assembly 110 through the second box 122 to achieve heat transfer, thereby achieving temperature adjustment of the battery cell assembly 110.

[0140] In some embodiments of the present application, the first box body 121 is arranged on the top of the second box body 122, and the heat exchange component 20 is arranged on the side of the second box body 122 away from the first box body 121, wherein the connection method between the heating element 23 and the second box body 122 is bonding, welding, clamping or connecting via a connecting piece, and the connection method between the heat exchange element 22 and the second box body 122 and / or the heating element 23 is bonding, welding, clamping or connecting via a connecting piece.

[0141] Specifically, the first box 121 is disposed on the top of the second box 122, and the heat exchange assembly 20 is disposed on the side of the second box 122 away from the first box 121, that is, the heat exchange assembly 20 is disposed at the bottom of the box 120. When the battery device 100 is used in an electrical device such as a vehicle 1000, the top of the battery device 100 is usually embedded in the electrical device. The heat exchange assembly 20 is disposed on the side of the second box 122 away from the first box 121, which can reduce the occupation of the top space outside the box 120 by the heat exchange assembly 20, and facilitate the layout and installation of the battery device 100 on the electrical device.

[0142] In addition, the connection between the heating element 23 and the second box body 122 is configured to be bonded, welded, clamped or connected via a connector, so that the connection can be configured according to the assembly requirements of the battery device 100, thereby improving the flexibility of the assembly process.

[0143] In addition, the heat exchange element 22 can be connected to at least one of the second box body 122 and the heating element 23, and the connection method is set to be bonding, welding, clamping or connecting via a connector, so that the connection method can be set according to the assembly requirements of the battery device 100, thereby improving the flexibility of the assembly process.

[0144] In some embodiments of the present application, Figure 3 As shown, the heat exchange component 20 also includes a protective member 21, which is arranged on the side of the heat exchange member 22 away from the second box body 122, and the protective member 21 is connected to at least one of the second box body 122, the heating member 23 and the heat exchange member 22, and the protective member 21 shields at least part of the heat exchange member 22 and at least part of the heating member 23.

[0145] Specifically, the protective member 21 is a component that can play a protective role. The protective member 21 is connected to at least one of the second box 122, the heating member 23 and the heat exchange member 22. For example, the protective member 21 can be connected only to the second box 122, the protective member 21 can also be connected only to the heating member 23, the protective member 21 can also be connected only to the heat exchange member 22, the protective member 21 is respectively connected to the second box 122, the protective member 21 and the heating member 23, etc.

[0146] The protective member 21 blocks the side of the heating element 23 and the heat exchange element 22 away from the second box body 122, so that at least part of the body of the heat exchange element 22 and at least part of the body of the heating element 23 are arranged between the second box body 122 and the protective member 21. The protective member 21 is used to block at least part of the body of the heat exchange element 22 and at least part of the body of the heating element 23. When an impact object (flying stones, etc.) appears from the outside, the protective member 21 can block the impact object, thereby reducing the impact of the impact object on the heating element 23 and the heat exchange element 22, thereby reducing the damage of the heating element 23 or the heat exchange element 22 caused by the impact object, thereby reducing the failure rate of the battery device 100, so that the maintenance cost of the battery device 100 is reduced.

[0147] It should be noted that the protective member 21 may be a plate-shaped member or a mesh-shaped member.

[0148] In some embodiments of the present application, the protective member 21 is connected to the second box body 122 and encloses a storage space with the second box body 122. The heating element 23 and at least part of the heat exchange element 22 are arranged in the storage space. The connection method between the protective member 21 and the second box body 122 is bonding, welding, clamping or connection via a connecting member.

[0149] Specifically, in this embodiment, the protective member 21 is a plate-shaped member having a flange, which is connected to the side of the second box body 122 away from the first box body 121, so that the plate part of the protective member 21 is spaced apart from the part of the second box body 122 away from the first box body 121, thereby forming a accommodating space, and the heating element 23 and at least part of the heat exchange element 22 are arranged in the accommodating space, and the protective member 21 is used to fully shield the heating element 23 and the heat exchange element 22, thereby improving the protection effect of the heat exchange element 22 and the heating element 23.

[0150] In addition, the connection between the protective member 21 and the second box body 122 is configured to be bonded, welded, clamped or connected via a connector, so that the connection can be configured according to the assembly requirements of the battery device 100, thereby improving the flexibility of the assembly process.

[0151] In addition, in the arrangement of the first box body 121 and the second box body 122, the protective member 21 is spaced apart from the heating member 23 and the heat exchange member 22. With this arrangement, when an impact object outside the accommodating space impacts the protective member 21, by arranging the protective member 21 to be spaced apart from the heating member 23 and the heat exchange member 22, the vibration transmitted to the heating member 23 and the heat exchange member 22 during the impact can be reduced, thereby reducing the adverse effects of the vibration on the heating member 23 and the heat exchange member 22. At the same time, the space between the protective members 21 can provide space for the deformation of the protective member 21, so that the impact force of the impact object can be absorbed by the deformation of the protective member 21, thereby further improving the protection effect.

[0152] In some embodiments of the present application, the heat exchange assembly 20 further includes a first seal (not shown in the figure), which is disposed between the protective member 21 and the second box body 122 and seals the interface between the protective member 21 and the second box body 122 .

[0153] Specifically, the protective member 21 is connected to the side of the second box body 122 facing away from the first box body 121, and a accommodating space is formed between the protective member 21 and the second box body 122. The heating element 23 and at least part of the heat exchange element 22 are arranged in the installation space. The first sealing member is used to improve the sealing performance of the accommodating space, so that the accommodating space is effectively isolated from the outside world, reducing the adverse effects of external environmental factors (water or solid substances, etc.) on the heating element 23 and the heat exchange element 22 in the accommodating space.

[0154] In some embodiments of the present application, the first sealing member is a sealing gasket or a sealant.

[0155] Specifically, the protective member 21 is connected to the side of the second box body 122 facing away from the first box body 121, and a accommodating space is formed between the protective member 21 and the second box body 122. The heating member 23 and at least part of the heat exchange member 22 are arranged in the installation space, and a first sealing member is provided at the joint interface between the protective member 21 and the second box body 122 to improve the sealing of the accommodating space.

[0156] The first sealing member is configured as a sealing pad or a sealing adhesive, which can facilitate assembly, thereby improving assembly efficiency. In addition, the first sealing member is configured as a sealing pad or a sealing adhesive, which can effectively reduce manufacturing costs.

[0157] In addition, when the first sealing member is a sealant, the sealant can be used to directly bond and fix the protective member 21 to the second box body 122, thereby improving the convenience of assembly between the protective member 21 and the second box body 122. At the same time, the bonding and fixing method has a simple structure and can effectively reduce the manufacturing cost.

[0158] In some embodiments of the present application, the heat exchange assembly 20 also includes a support member (not shown in the figure), which is arranged on the side of the protective member 21 facing the second box body 122, one side of the support member abuts against the heating member 23 and / or the heat exchange member 22, and the other side of the support member abuts against the protective member 21.

[0159] Specifically, the protective member 21 is connected to the side of the second box 122 away from the first box 121, and a storage space is formed between the protective member 21 and the second box 122. The heating member 23 and at least part of the heat exchange member 22 are arranged in the installation space. The heating member 23 and the heat exchange member 22 are arranged at intervals from the protective member 21. On the opposite sides of the support member, one side abuts against the protective member 21, and the other side can abut only against the heating member 23, or only against the heat exchange member 22, or respectively against the heating member 23 and the heat exchange member 22. The support member can be used to support the heating member 23 and the heat exchange member 22, thereby improving the stability of the structure.

[0160] It should be pointed out that in the present application, the thermal conductivity of the support member is less than 0.1 W / (m·K), so that the protective member 21 and the heating member 23 and the heat exchange member 22 can be thermally insulated, which can reduce the heat transferred to the protective member 21 through the support member, and can effectively achieve the insulation of the heating member 23 and the heat exchange member 22.

[0161] In some embodiments of the present application, the support member abuts against the protective member 21, the heat exchange member 22 forms a first projection on the protective member 21, the support member forms a second projection on the protective member 21, the shape of the first projection is consistent with the shape of the second projection, and the first projection is within the range of the second projection.

[0162] Specifically, the protective member 21 is connected to the side of the second box body 122 away from the first box body 121, and an accommodating space is formed between the protective member 21 and the second box body 122. The heating member 23 and at least part of the heat exchange member 22 are arranged in the installation space. The heating member 23 and the heat exchange member 22 are spaced apart from the protective member 21. On the opposite sides of the support member, one side abuts against the protective member 21, and the other side abuts against the heat exchange member 22. The shape of the support member is consistent with the collision of the heat exchange member 22. On the basis of having good supporting performance, the volume of the support member can be reduced, which can not only reduce the manufacturing cost, but also reduce the overall quality of the battery device 100.

[0163] In some embodiments of the present application, the supporting member is a flexible member.

[0164] Specifically, the support member is configured as a flexible member, which can have flexibility through elastic deformation. The flexibility of the support member can be used to absorb external impact force, thereby reducing the possibility of damage to the heating member 23 and the heat exchange member 22.

[0165] It should be pointed out that in the present application, the support member may be a foam member, for example, RPU foam (a type of polyurethane foam material. RPU foam has the characteristics of porosity, low density and high strength, and is mainly composed of a large number of micropores and polyurethane resin pore wall meridians. It has a soft texture and has the characteristics of heat preservation, heat insulation, sound absorption, shock absorption, flame retardancy, anti-static and breathable). RPU foam takes into account the requirement of low moisture absorption rate, thereby further meeting the needs of use.

[0166] In some embodiments of the present application, the heating element 23 includes a heating element, which is a metal element or a non-metal element.

[0167] Specifically, the heating element of the heating element 23 is set as a metal element or a non-metal element, and the heating element of the heating element 23 can be set as needed, thereby increasing the application range of the heating element 23.

[0168] It should be noted that when the heating element 23 is a metal element, the metal element may be a copper element, a stainless steel element, an aluminum alloy element, etc., and when the heating element 23 is a non-metal element, the heating element 23 may be graphite, etc.

[0169] In some embodiments of the present application, Figure 3 As shown, the battery device 100 further includes a plurality of electrical connection components 30 , which are installed in the box 120 . The heating element 23 is an electric heating structure, and the heating element 23 is electrically connected to the battery cell assembly 110 through an electrical connection component 30 .

[0170] Specifically, during assembly, the heating element 23 is first connected to the side of the second box 122 away from the first box 121, and then the heating element 23 is electrically connected to an electrical connection component 30. This arrangement facilitates the electrical connection between the heating element 23 and the battery cell assembly 110, thereby improving the convenience of assembly.

[0171] In some embodiments of the present application, Figures 6 to 8 As shown, the box body 120 is provided with vias having the same number as the electrical connection components 30, each electrical connection component 30 includes a mounting seat 31 and a pin row 32, the mounting seat 31 is connected to the box body 120 and closes the via hole, the pin row 32 is installed on the mounting seat 31 and is located at the location where the via hole is located, the pin row 32 includes a plurality of needle bodies 321, a first end of each needle body 321 is protrudingly arranged inside the box body 120 and is electrically connected to the battery cell assembly 110, and a second end of the needle body 321 is protrudingly arranged outside the box body 120 and is electrically connected to the heating element 23.

[0172] Specifically, the mounting base 31 is installed on the box body 120 and closes the through hole on the box body 120. The pin header 32 is arranged at the position of the through hole. One end of the needle body 321 of the pin header 32 protrudes from the inside of the box body 120, and the other end of the needle body 321 protrudes from the outside of the box body 120. The first end of the needle body 321 protruding from the inside of the box body 120 is electrically connected to the battery cell assembly 110, and the second end of the needle body 321 protruding from the outside of the box body 120 is electrically connected to the heating element 23.

[0173] Among them, a connecting terminal is provided on the heating element 23, one end of the connecting terminal is electrically connected to the heating element 23, and the connecting terminal is connected to the pin 32 by plugging. Such a setting facilitates the electrical connection between the heating element 23 and the battery cell assembly 110, thereby improving the convenience of assembly.

[0174] It should be pointed out that the mounting seat 31 is an insulating part and the pin header 32 is a conductive part, wherein the mounting seat 31 can be a ceramic or plastic part, etc. When the mounting seat 31 is a plastic part, the mounting seat 31 is processed and manufactured by injection molding, and the pin header 32 is fixed together with the mounting seat 31 during the injection molding process.

[0175] In some embodiments of the present application, the electrical connection assembly 30 further includes a second seal 33 , which is disposed between the mounting seat 31 and the box body 120 , and the second seal 33 seals a bonding interface between the mounting seat 31 and the box body 120 .

[0176] Specifically, the mounting seat 31 is arranged in the box body 120 and is connected and fixed to the box body 120, the second sealing member 33 is arranged between the mounting seat 31 and the box body 120, and the second sealing member 33 seals the joint interface between the mounting seat 31 and the box body 120. The second sealing member 33 is utilized to ensure the sealing performance of the connection position of the mounting seat 31, so that the interior of the box body 120 is effectively isolated from the outside world, thereby reducing the adverse effects of external environmental factors (water or solid substances, etc.) on the interior of the box body 120.

[0177] It should be noted that the second sealing member 33 is disposed around the circumference of the via hole, so that the sealing performance of the circumferential direction of the via hole can be effectively improved.

[0178] In some embodiments of the present application, the second sealing member 33 is a sealing gasket or a sealant.

[0179] Specifically, the mounting seat 31 is disposed in the box body 120 and is connected and fixed to the box body 120, the second sealing member 33 is disposed between the mounting seat 31 and the box body 120, and the second sealing member 33 seals the joining interface between the mounting seat 31 and the box body 120, and the second sealing member 33 is utilized to ensure the sealing of the connection position of the mounting seat 31.

[0180] The second sealing member 33 is configured as a sealing pad or a sealing adhesive, which can facilitate assembly, thereby improving assembly efficiency. In addition, the second sealing member 33 is configured as a sealing pad or a sealing adhesive, which can effectively reduce manufacturing costs.

[0181] It should be understood that when the second sealing member 33 is a sealant, the sealant can be used to directly bond and fix the protective member 21 to the second box body 122, thereby improving the convenience of assembly between the protective member 21 and the second box body 122. At the same time, the bonding and fixing method has a simple structure and can effectively reduce the manufacturing cost.

[0182] When the second sealing member 33 is a sealing gasket, the sealing gasket is silicon foam, so as to achieve both low moisture absorption rate and effective compression sealing.

[0183] In some embodiments of the present application, the connection between the mounting base 31 and the box body 120 includes bonding, welding, clamping or connection via a connector.

[0184] Specifically, the connection between the mounting base 31 and the box body 120 is set to be bonding, welding, clamping or connection via a connector. The connection method can be set according to the needs of use, thereby increasing the application range of the battery device 100.

[0185] For example, the mounting base 31 and the box body 120 are connected by bolts 50. During the assembly process, the stud of the bolt 50 passes through the mounting base 31 and is locked on the box body 120, and a second sealing member 33 is clamped between the mounting base 31 and the box body 120, thereby fixing the mounting base 31 on the box body 120 and achieving sealing between the mounting base 31 and the box body 120.

[0186] In some embodiments of the present application, the battery device 100 also includes a control device and a heating circuit, the heating circuit is electrically connected to the battery cell assembly 110, the heating element 23 is connected to the heating circuit through at least one electrical connection assembly 30, the heating circuit includes a current detection element, the current detection element is used to detect the current in the heating circuit, the control device is electrically connected to the current detection element and is used to control the on and off of the heating circuit.

[0187] Specifically, the electrical connection assembly 30 is electrically connected to the battery cell assembly 110 through the heating circuit, and the heating element 23 is electrically connected to the electrical connection assembly 30. When the battery cell assembly 110 needs to be heated up and the heating element 23 needs to be operated, the battery cell assembly 110 supplies power to the heating element 23 through the heating circuit, and the heating element 23 operates. The heat generated by the heating element 23 is transferred to the battery cell assembly 110 through the box 120 to increase the temperature of the battery cell assembly 110, so that the battery cell assembly 110 can reach the optimal operating temperature.

[0188] During the heating process of the heating element 23, the current detection element detects the current in the heating circuit. When the current fluctuation exceeds the preset value, the control device controls the heating circuit to be disconnected to stop the operation of the heating element 23, thereby reducing safety hazards and effectively improving the safety performance of the battery device 100.

[0189] In addition, in the present application, the preset value is 15% of the heating current to improve the safety of the heating process.

[0190] It should be pointed out that in the present application, the heating element 23 can be connected to the heating circuit by connecting to an electrical connection component 30 (the electrical connection component 30 includes a positive electrode and a negative electrode), and the heating element 23 can also be connected to the heating circuit by two electrical connection components 30 (one electrical connection component 30 is connected to the positive electrode, and the other electrical connection component 30 is connected to the negative electrode).

[0191] In some embodiments of the present application, the heating circuit further includes a fuse component, which is configured to fuse when the current of the heating circuit exceeds a preset current to disconnect the heating circuit.

[0192] Specifically, the electrical connection assembly 30 is electrically connected to the battery cell assembly 110 through the heating circuit, and the heating element 23 is electrically connected to the electrical connection assembly 30. When the battery cell assembly 110 needs to be heated up and the heating element 23 needs to be operated, the battery cell assembly 110 supplies power to the heating element 23 through the heating circuit, and the heating element 23 operates. The heat generated by the heating element 23 is transferred to the battery cell assembly 110 through the box 120 to increase the temperature of the battery cell assembly 110, so that the battery cell assembly 110 can reach the optimal operating temperature.

[0193] During the heating process of the heating element 23, the current in the heating circuit passes through the fuse component. When the current exceeds the preset current, the fuse component actively melts to disconnect the heating circuit, thereby stopping the operation of the heating element 23, thereby reducing safety hazards and effectively improving the safety performance of the battery device 100.

[0194] In addition, in the present application, the preset current is 15% of the heating current to improve the safety of the heating process.

[0195] In some embodiments of the present application, the heating element 23 includes a heating element and an insulating layer. The heating element is electrically connected to the battery cell assembly 110 , and the insulating layer is disposed on the outer surface of the heating element so that the heating element is insulated.

[0196] Specifically, the insulating layer is arranged on the outer surface of the heating element, and the insulating layer insulates the heating element from the outside. Such arrangement can improve the insulation performance of the heating element 23, so that the safety performance of the heating element 23 is effectively improved.

[0197] Among them, the heating core of the heating plate can be made of metal (generally ①H65 rolled brass, ②SUS304 stainless steel, ③chrome-nickel alloy, ④aluminum alloy), or PTC material (generally ①carbon paste heating + silver paste conductive, ②graphene, etc.). The material of the insulating layer is generally ①polyimide film (PI film), ②epoxy resin board, ③PI (polyimide) + epoxy resin board, ④PET (polyethylene terephthalate). In order to prevent the bottom ball, external gravel impact and scraping conditions, the outer side of the protective part 21 needs to be sprayed with a protective coating, and the coating material can be selected from PVC or polyurea system materials.

[0198] It should be pointed out that in the present application, the heating element is connected to the electrical connection component 30 through a wiring harness with a connector, wherein the wiring harness is electrically connected to the heating element by welding, the connector is electrically connected to the end of the wiring harness facing away from the heating element (for example, crimping, etc.), and the connector is plugged into the pin header 32 of the electrical connection component 30, thereby realizing the electrical connection between the heating element and the electrical connection component 30, wherein the outer side of the connection position between the connector and the electrical connection component 30 is sealed (for example, by coating with glue or setting other sealing parts).

[0199] In some embodiments of the present application, the heating element 23 is a plate-shaped element, and the power density of the heating element 23 is 0.8 W / cm 2 ~1.5W / cm 2 within the range.

[0200] Specifically, the heating element 23 is disposed outside the housing 120, and the heating element 23 exchanges heat with the battery cell assembly 110 through the housing 120, and the power density of the heating element 23 is set at 0.8 W / cm 2 ~1.5W / cm 2 Within the range of , the heating capacity of the heating element 23 can be improved, so that the heating element 23 can meet the heating requirements of the battery cell assembly 110, and thus meet the operation requirements of the battery device 100.

[0201] It should be noted that in the present application, the power density of the heating element 23 can be 0.8 W / cm 2 , 0.9W / cm 2 , 1W / cm 2 , 1.1W / cm 2 , 1.2W / cm 2 , 1.3W / cm 2 , 1.4W / cm 2 , 1.5W / cm 2 .

[0202] In addition, the heating rate of the heating element 23 on the battery cell assembly 110 can reach 0.5° C. / min.

[0203] In addition, the heating element 23 is connected to the box body 120, and the minimum distance between the heating element 23 and the edge of the box body 120 is in the range of 10 mm to 15 mm (for example, it can be 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm). By controlling the distance between the heating element 23 and the edge of the box body 120, the volume of the heating element 23 can be reduced while effectively heating the battery cell assembly 110, thereby reducing the manufacturing cost of the battery device 100 and effectively reducing the overall quality of the battery device 100.

[0204] In some embodiments of the present application, the heating element 23 is a plate-shaped element, and the flatness of the heating element 23 is greater than or equal to 0 mm and less than or equal to 5 mm.

[0205] Specifically, one side of the box body 120 connected to the heating element 23 is a planar structure. By controlling the flatness of the heating element 23, the heating element 23 and the box body 120 have good fitting properties, which can increase the contact area between the heating element 23 and the box body 120, thereby improving the efficiency of heat transfer between the heating element 23 and the box body 120, so that the heating effect of the heating element 23 on the battery cell assembly 110 through the box body 120 is improved.

[0206] It should be pointed out that, in the present application, the flatness of the heating element 23 can be 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm.

[0207] In some embodiments of the present application, the heat exchange element 22 includes a medium flow channel, and the medium flow channel is used to accommodate a heat exchange medium.

[0208] Specifically, the heat exchange element 22 can exchange heat with the battery cell assembly 110 in the box body 120, wherein the heat exchange includes but is not limited to cooling. For example, the heat exchange element 22 can only cool the battery cell assembly 110 (i.e., lower the temperature of the battery cell assembly 110), and the heat exchange element 22 can also heat the battery cell assembly 110 (i.e., increase the temperature of the battery cell assembly 110) or cool it.

[0209] A medium flow channel is provided in the heat exchange element 22, and a heat exchange medium is provided in the medium flow channel. The heat exchange medium is used to exchange heat for the battery cell assembly 110, thereby improving the heat exchange efficiency of the battery cell assembly 110, so that the heat exchange effect of the heat exchange element 22 on the battery cell assembly 110 can be improved.

[0210] It should be pointed out that, in the present application, the heat exchange efficiency of the heat exchange element 22 for the battery cell assembly 110 can reach 0.3°C / min.

[0211] In addition, in the present application, the heat exchange medium may be water, ethylene glycol or a refrigerant medium or the like.

[0212] In addition, the number of the medium flow channels includes but is not limited to one, and may also be two or more.

[0213] In some embodiments of the present application, Figures 3 to 5As shown, the heat exchange component 20 also includes a collecting member 40, which is connected to the heat exchange member 22. The collecting member 40 includes a collecting body 42, and the collecting body 42 includes a first channel and a second channel spaced apart from each other. One end of the medium flow channel is connected to the first channel and allows the heat exchange medium to flow in, and the other end of the medium flow channel is connected to the second channel and allows the heat exchange medium to flow out.

[0214] Specifically, the first channel and the second channel of the collecting member 40 are respectively connected to the two ends of the medium flow channel of the heat exchange member 22. The first channel is used to allow the heat exchange medium to flow into the medium flow channel, and the second channel is used to allow the heat exchange medium to flow out of the medium flow channel. The collecting member 40 is used to connect the external heat exchange medium circulation equipment with the medium flow channel, thereby realizing the circulation of the heat exchange medium, so as to improve the heat exchange efficiency of the heat exchange member 22 to the battery cell assembly 110, and further improve the heat exchange effect on the battery cell assembly 110.

[0215] In some embodiments of the present application, Figures 3 to 5 As shown, the current collecting member 40 further includes a liquid inlet joint 41 and a liquid outlet joint 43. The liquid inlet joint 41 is connected to the current collecting body 42 and communicates with the first channel, and the liquid outlet joint 43 is connected to the current collecting body 42 and communicates with the second channel.

[0216] Specifically, by providing the liquid inlet connector 41 and the liquid outlet connector 43 , it is convenient to connect with the external heat exchange medium circulation system, thereby improving the convenience of connection.

[0217] In some embodiments of the present application, the battery device 100 further includes a control device and a temperature detection element. The temperature detection element is electrically connected to the control device via an electrical connection assembly 30 . The temperature detection element is at least used to detect the temperature of the heat exchange medium at the position of the current collecting member 40 .

[0218] Specifically, the temperature of the heat exchange structure at the position of the current collecting member 40 is detected by using a temperature detection element, and the detected data is fed back to the control device, and the control device controls whether the heat exchange member 22 is in operation according to the detected temperature data. For example, when the temperature difference between the inlet temperature and the outlet temperature is greater than or equal to a preset value (for example, the preset value may be 5 degrees Celsius), it indicates that the battery device 100 needs to perform heat exchange, and the control device needs to maintain the circulation of the heat exchange medium. When the temperature difference between the inlet temperature and the outlet temperature is less than the preset value, it indicates that the battery device 100 does not need to perform heat exchange at present. At this time, the control device stops the circulation of the heat exchange medium, thereby reducing energy consumption.

[0219] It should be noted that the temperature detection element may be a temperature sensor (eg, a negative temperature coefficient thermistor (NTCthermistor, Negative Temperature Coefficient thermistor), etc.).

[0220] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the heat exchange component 20 also includes a protective member 21, which is arranged on the side of the heat exchange component 22 away from the second box body 122 and connected to the second box body 122. The battery device 100 also includes a leakage detection element, which is electrically connected to the control device through an electrical connection component 30. The leakage detection element is at least used to detect whether there is leaked heat exchange medium on the protective member 21.

[0221] Specifically, the leakage detection element is arranged on the side of the protective member 21 facing the second box body 122 and is electrically connected to the control device. When the heat exchange medium in the medium flow channel of the heat exchange member 22 leaks, the leaked heat exchange medium will fall onto the protective member 21. When the leaked heat exchange medium appears on the protective member 21, the leakage detection element feeds back the detected data to the control device, and the control device issues a reminder to the user according to the fed-back data to reduce the safety risk.

[0222] It should be noted that the leakage detection element can be a sampling resistor, which is arranged on the protective member 21. When the heat exchange medium leaks on the protective member 21, the resistance of the sampling resistor changes, so that the control device can effectively obtain the signal of heat exchange medium leakage.

[0223] In addition, a recessed position is provided on the side of the protective member 21 facing the second box body 122, and a leakage detection element is arranged in the recessed position. When the heat exchange medium leaks, the leaked heat exchange medium falls onto the protective member 21 and flows to the recessed position so as to be detected by the leakage detection element, thereby improving the detection accuracy.

[0224] In some embodiments of the present application, the heat exchange element 22 is a plate-shaped element or a tubular element.

[0225] Specifically, the heat exchange element 22 is configured as a plate-shaped element or a tubular element, and the heat exchange element 22 can be configured according to the usage scenario, so that the application scope of the heat exchange element 22 is increased.

[0226] In some embodiments of the present application, the heat exchange element 22 is a tubular element, and the tubular element has a curved structure in the same plane.

[0227] Specifically, the heat exchange element 22 is configured as a tubular element, and the tubular element is configured as a curved structure in the same plane, which can increase the length of the heat exchange element 22, thereby increasing the heat exchange time between the heat exchange element 22 and the battery cell 10, thereby improving the heat exchange effect on the battery cell assembly 110.

[0228] In addition, the heat exchange member 22 is configured as a tubular member, and the tubular member is configured to be a curved structure in the same plane. On the basis of achieving a good heat exchange effect on the battery cell assembly 110, the mass of the heat exchange member 22 can be effectively reduced, thereby effectively reducing the overall mass of the battery device 100.

[0229] It should be pointed out that the tubular member is in a curved structure in the same plane, and the tubular member can be in a U-shaped structure or a serpentine structure, etc.

[0230] In some embodiments of the present application, the wall thickness of the tubular member is in the range of 0.3 mm to 2 mm.

[0231] Specifically, the heat exchanger 22 is a tubular member, and the wall thickness of the tubular member is within the range of 0.3 mm to 2 mm, so that the heat exchanger 22 has sufficient structural strength and can reduce the mass of the heat exchanger 22, thereby reducing the overall mass of the battery device 100.

[0232] In addition, setting the wall thickness of the tubular member within a range of 0.3 mm to 2 mm can improve heat exchange efficiency.

[0233] It should be pointed out that, in the present application, the wall thickness of the tubular member can be 0.3 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1 mm, 1.3 mm, 1.5 mm, 1.8 mm, or 2 mm.

[0234] In some embodiments of the present application, the flatness of the heating element 23 is greater than or equal to 0 mm and less than or equal to 5 mm.

[0235] Specifically, the heat exchange element 22 is connected to the box body 120 and / or the heating element 23. The side where the box body 120 and / or the heating element 23 are connected to the heat exchange element 22 is a planar structure. By controlling the flatness of the heating element 23, the heating element 23 and the box body 120 have good fitting properties, which can increase the contact area and further improve the efficiency of heat transfer, so that the heating effect of the heat exchange element 22 on the battery cell assembly 110 is improved.

[0236] It should be pointed out that, in the present application, the flatness of the heat exchange element 22 can be 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm.

[0237] In some embodiments of the present application, the heat exchange element 22 is a metal element or a non-metal element.

[0238] Specifically, the heat exchange element 22 is configured as a metal element or a non-metal element, and the heat exchange element 22 can be configured as needed, thereby increasing the application scope of the heat exchange element 22.

[0239] In some embodiments of the present application, the heat exchange element 22 is a metal element, and an insulating coating is provided on the outer surface of the heat exchange element 22 , and the insulating coating is used to insulate the heat exchange element 22 .

[0240] Specifically, the heat exchange element 22 is set as a metal element, and the outer surface of the heat exchange element 22 is provided with an insulating coating, which can effectively improve the heat exchange performance of the heat exchange element 22 and reduce the short circuit between the heat exchange element 22 and other components, thereby improving the safety performance of the battery device 100.

[0241] In the present application, the insulating coating includes but is not limited to epoxy insulating coating and the like.

[0242] In some embodiments of the present application, the heat exchange element 22 is made of copper, aluminum alloy or stainless steel.

[0243] Specifically, the heat exchange element 22 is configured as a copper element, an aluminum alloy element or a stainless steel element, and the heat exchange element 22 can be configured as required, thereby increasing the application scope of the heat exchange element 22.

[0244] For example, when the heat exchanger 22 is an aluminum alloy, the material may be 3003mod aluminum alloy, and formed by extrusion and bending processes. The end of the heat exchanger 22 is connected and fixed to the current collecting member 40 by welding.

[0245] In some embodiments of the present application, the heating element 23 is a plate-shaped element, and the heating element 23 is connected to the side of the second box 122 away from the first box 121 through a first thermally conductive adhesive, and the heating element 23 is connected to the side of the second box 122 away from the second thermally conductive adhesive.

[0246] Specifically, the heating element 23 is connected to the second box body 122 via the first heat-conducting adhesive, which can improve the connection strength and thus improve the stability of the structure.

[0247] In addition, the provision of the first thermally conductive adhesive can increase the thermal conductivity between the heating element 23 and the second box body 122 , thereby improving the heating effect on the battery cell assembly 110 .

[0248] In addition, the use of thermally conductive adhesive to connect the heating element 23 to the second box body 122 can simplify the assembly process, thereby shortening the assembly time and speeding up the production cycle.

[0249] It should be understood that when the battery device 100 is used in an electrical device, for example, the electrical device is a vehicle 1000, the heating element 23 is connected to the second box body 122 through the first thermal conductive adhesive, and the heating is turned on under driving conditions, that is, under vibration + mechanical shock + high temperature conditions, it is required that the structural adhesive between the heating element 23 and the second box body 122 does not debond, and the bonding strength meets the structural strength requirements.

[0250] It should be pointed out that the insulating layer of the heating element 23 is an epoxy resin board, which is connected to the second box body 122 through a first thermally conductive adhesive. At the same time, the epoxy resin board is bonded to the heating element of the heating element 23. The bonding strength between the epoxy resin board and the second box body 122 is less than or equal to the bonding strength between the epoxy resin board and the heating element. Such a setting can reduce the separation between the insulating layer and the heating element, thereby further improving the safety of the battery device 100.

[0251] In some embodiments of the present application, along the arrangement direction of the heating element 23 and the second box body 122 , the size of the first thermal conductive adhesive is in the range of 0.1 mm to 3 mm.

[0252] Specifically, by setting the size of the first thermally conductive adhesive within the range of 0.1 mm to 3 mm, the structural strength of the connection position can be further improved, so that the structural stability is effectively improved.

[0253] It should be pointed out that in the present application, along the arrangement direction of the heating element 23 and the second box body 122, the size of the first thermal conductive adhesive can be 0.1 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1 mm, 1.3 mm, 1.5 mm, 1.8 mm, 2 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, and 3 mm.

[0254] In some embodiments of the present application, along the arrangement direction of the heating element 23 and the second box body 122 , the size of the second thermal conductive adhesive is in the range of 0.1 mm to 3 mm.

[0255] Specifically, by setting the size of the second thermally conductive adhesive within the range of 0.1 mm to 3 mm, the structural strength of the connection position can be further improved, so that the structural stability is effectively improved.

[0256] It should be pointed out that in the present application, along the arrangement direction of the heating element 23 and the second box body 122, the size of the second thermal conductive adhesive can be 0.1 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1 mm, 1.3 mm, 1.5 mm, 1.8 mm, 2 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, and 3 mm.

[0257] In some embodiments of the present application, the heating element 23 is a plate-shaped element, and an avoidance structure 231 is provided on the heating element 23. The heating element 23 is connected to the side of the second box body 122 facing away from the first box body 121 through a first thermally conductive adhesive. At least part of the heat exchange element 22 is embedded in the avoidance structure 231, and is connected to the side of the second box body 122 facing away from the first box body 121 through a second thermally conductive adhesive at the position of the avoidance structure 231.

[0258] Specifically, at least a portion of the heat exchange component 22 is embedded in the avoidance structure 231 of the heating component 23, and is connected to the side of the second box body 122 away from the first box body 121 at the position of the avoidance structure 231 through a second thermal conductive adhesive, thereby reducing the size in the arrangement direction of the first box body 121 and the second box body 122, thereby reducing the overall volume of the battery device 100.

[0259] In addition, the provision of the first thermally conductive adhesive can increase the thermal conductivity between the heating element 23 and the second box body 122 , thereby improving the heating effect on the battery cell assembly 110 .

[0260] In addition, the use of thermally conductive adhesive to connect the heating element 23 to the second box body 122 can simplify the assembly process, thereby shortening the assembly time and speeding up the production cycle.

[0261] It should be understood that when the battery device 100 is used in an electrical device, for example, the electrical device is a vehicle 1000, the heating element 23 is connected to the second box body 122 through the first thermal conductive adhesive, and the heating is turned on under driving conditions, that is, under vibration + mechanical shock + high temperature conditions, it is required that the structural adhesive between the heating element 23 and the second box body 122 does not debond, and the bonding strength meets the structural strength requirements.

[0262] It should be pointed out that the insulating layer of the heating element 23 is an epoxy resin board, which is connected to the second box body 122 through a first thermally conductive adhesive. At the same time, the epoxy resin board is bonded to the heating element of the heating element 23. The bonding strength between the epoxy resin board and the second box body 122 is less than or equal to the bonding strength between the epoxy resin board and the heating element. Such a setting can reduce the separation between the insulating layer and the heating element, thereby further improving the safety of the battery device 100.

[0263] In addition, the heating element 23 can be an integrated structure or a split structure. When the heating element 23 is a split structure, multiple parts are spaced apart to form an avoidance structure 231, and each part is connected to the heating circuit through at least one electrical connection component 30.

[0264] In some embodiments of the present application, along the arrangement direction of the heating element 23 and the second box body 122 , the size of the first thermal conductive adhesive is in the range of 0.1 mm to 3 mm.

[0265] Specifically, by setting the size of the first thermally conductive adhesive within the range of 0.1 mm to 3 mm, the structural strength of the connection position can be further improved, so that the structural stability is effectively improved.

[0266] It should be pointed out that in the present application, along the arrangement direction of the heating element 23 and the second box body 122, the size of the first thermal conductive adhesive can be 0.1 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1 mm, 1.3 mm, 1.5 mm, 1.8 mm, 2 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, and 3 mm.

[0267] In some embodiments of the present application, along the arrangement direction of the heating element 23 and the second box body 122 , the size of the second thermal conductive adhesive is in the range of 0.1 mm to 3 mm.

[0268] Specifically, by setting the size of the second thermally conductive adhesive within the range of 0.1 mm to 3 mm, the structural strength of the connection position can be further improved, so that the structural stability is effectively improved.

[0269] It should be pointed out that in the present application, along the arrangement direction of the heating element 23 and the second box body 122, the size of the second thermal conductive adhesive can be 0.1 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1 mm, 1.3 mm, 1.5 mm, 1.8 mm, 2 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, and 3 mm.

[0270] like Figures 1 to 8 As shown, the second aspect of the present application proposes an electrical device, which includes the battery device 100 as described above.

[0271] In the battery device 100 of the electric device, the heat exchange assembly 20 is arranged outside the box 120, and the battery cell assembly 110 in the box 120 is heated by the heating element 23, and the battery cell 10 is cooled by the heat exchange element 22, thereby adjusting the temperature of the battery cell assembly 110, so that the battery cell assembly 110 can be maintained at an optimal working temperature. By arranging the heat exchange assembly 20 outside the box 120, the occupation of the internal space of the box 120 is reduced, so that the space utilization rate of the box 120 is effectively improved, and the energy density of the battery device 100 can be improved.

[0272] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0273] In the implementation mode of the present application, Figures 2 to 8As shown, the present application proposes a battery device 100, which includes a case 120, a battery cell assembly 110 and a heat exchange assembly 20. The battery cell assembly 110 is arranged in the case 120, and the heat exchange assembly 20 is arranged outside the case 120 and includes a heating element 23 and a heat exchange element 22. The heating element 23 is connected to the outer surface of the case 120 and can at least heat the battery cell assembly 110. The heat exchange element 22 is connected to the outer surface of the case 120 and at least one of the heating element 23. The heat exchange element 22 is at least used to cool the battery cell assembly 110.

[0274] Specifically, the heat exchange assembly 20 is arranged outside the box 120, and the battery cell assembly 110 in the box 120 is heated by the heating element 23, and the battery cell 10 is cooled by the heat exchange element 22, thereby adjusting the temperature of the battery cell assembly 110, so that the battery cell assembly 110 can be maintained at an optimal working temperature. By arranging the heat exchange assembly 20 outside the box 120, the occupation of the internal space of the box 120 is reduced, so that the space utilization rate of the box 120 is effectively improved, and the energy density of the battery device 100 can be improved.

[0275] Furthermore, the box 120 includes a first box 121 and a second box 122, and the first box 121 is connected to the second box 122. The first box 121 is arranged on the top of the second box 122, and the heat exchange assembly 20 is arranged on the side of the second box 122 away from the first box 121. The connection between the heating element 23 and the second box 122 is bonding, and the heat exchange element 22 is bonded to the second box 122 and / or the heating element 23.

[0276] Furthermore, the heat exchange component 20 also includes a protective member 21, which is disposed on the side of the heat exchange component 22 away from the second box body 122, and the protective member 21 is connected to the second box body 122, and the protective member 21 shields the heating element 23 and at least part of the body of the heat exchange component 22. The protective member 21 is connected to the second box body 122 and encloses a storage space with the second box body 122, and the heating element 23 and at least part of the heat exchange component 22 are disposed in the storage space, and the connection between the protective member 21 and the second box body 122 is via a connector. The heat exchange component 20 also includes a first sealing member, which is disposed between the protective member 21 and the second box body 122 and seals the interface between the protective member 21 and the second box body 122. The first sealing member is a sealing gasket or a sealant.

[0277] Furthermore, the heat exchange component 20 further includes a support member, which is a flexible member. The support member is arranged on the side of the protective member 21 facing the second box body 122, one side of the support member abuts against the heat exchange member 22, and the other side of the support member abuts against the protective member 21. The heat exchange member 22 forms a first projection on the protective member 21, and the support member forms a second projection on the protective member 21, and the shape of the first projection is consistent with the shape of the second projection, and the first projection is within the range of the second projection.

[0278] Furthermore, the battery device 100 further includes a plurality of electrical connection components 30, which are mounted on the box body 120. The heating element 23 is an electric heating structure, and the heating element 23 is electrically connected to the battery cell assembly 110 through an electrical connection component 30. This arrangement facilitates the electrical connection between the heating element 23 and the battery cell assembly 110, thereby improving the convenience of assembly.

[0279] Furthermore, the case 120 is provided with through holes of the same number as the electrical connection components 30, and each electrical connection component 30 includes a mounting seat 31 and a pin row 32, the mounting seat 31 is connected to the case 120 and closes the through hole, the pin row 32 is mounted on the mounting seat 31 and is located at the location of the through hole, and the pin row 32 includes a plurality of needle bodies 321, the first end of each needle body 321 is protrudingly arranged inside the case 120 and electrically connected to the battery cell assembly 110, and the second end of the needle body 321 is protrudingly arranged outside the case 120 and electrically connected to the heating element 23. The electrical connection component 30 also includes a second sealing member 33, which is arranged between the mounting seat 31 and the case 120, and the second sealing member 33 seals the interface between the mounting seat 31 and the case 120. The second sealing member 33 is a sealing pad or a sealant.

[0280] Furthermore, the mounting seat 31 and the box body 120 are connected via a connecting piece.

[0281] Furthermore, the battery device 100 further includes a control device and a heating circuit, the heating circuit is electrically connected to the battery cell assembly 110, the heating element 23 is connected to the heating circuit through at least two electrical connection assemblies 30, the heating circuit includes a current detection element, the current detection element is used to detect the current in the heating circuit, the control device is electrically connected to the current detection element and is used to control the on and off of the heating circuit. The heating circuit also includes a fuse component, which is configured to fuse when the current of the heating circuit exceeds a preset current to disconnect the heating circuit.

[0282] Furthermore, the heating element 23 includes a heating element and an insulating layer. The heating element is electrically connected to the battery cell assembly 110 , and the insulating layer is disposed on the outer surface of the heating element so that the heating element is insulated.

[0283] Furthermore, the heating element 23 is a plate-shaped element, and the power density of the heating element 23 is 0.8 W / cm2 ~1.5W / cm 2 within the range.

[0284] Furthermore, the heating element 23 is a plate-shaped element, and the flatness of the heating element 23 is greater than or equal to 0 mm and less than or equal to 5 mm.

[0285] Furthermore, the heat exchange component 22 includes a medium flow channel, which is used to accommodate the heat exchange medium. Such an arrangement can improve the heat exchange effect of the heat exchange component 22 on the battery cell assembly 110. The heat exchange assembly 20 also includes a collector 40, which is connected to the heat exchange component 22. The collector 40 includes a collector body 42. The collector body 42 includes a first channel and a second channel spaced apart from each other. One end of the medium flow channel is connected to the first channel and is used for the heat exchange medium to flow in. The other end of the medium flow channel is connected to the second channel and is used for the heat exchange medium to flow out. The collector 40 also includes a liquid inlet joint 41 and a liquid outlet joint 43. The liquid inlet joint 41 is connected to the collector body 42 and is connected to the first channel. The liquid outlet joint 43 is connected to the collector body 42 and is connected to the second channel.

[0286] Furthermore, the battery device 100 further includes a control device and a temperature detection element, the temperature detection element is electrically connected to the control device through at least one electrical connection component 30, and the temperature detection element is at least used to detect the temperature of the heat exchange medium at the position of the current collector 40. The battery device 100 further includes a leakage detection element, the leakage detection element is electrically connected to the control device through an electrical connection component 30, and the leakage detection element is at least used to detect whether there is leakage of heat exchange medium on the protective member 21.

[0287] Furthermore, the heat exchange member 22 is a tubular member, and the tubular member is curved in the same plane. The wall thickness of the tubular member is in the range of 0.3 mm to 2 mm. The flatness of the heating member 23 is greater than or equal to 0 mm and less than or equal to 5 mm.

[0288] Furthermore, the heat exchanger 22 is a metal part, and an insulating coating is provided on the outer surface of the heat exchanger 22, and the insulating coating is used to insulate the heat exchanger 22. The heat exchanger 22 is made of aluminum alloy.

[0289] In some examples of this embodiment, the heating element 23 is a plate-shaped element, and the heating element 23 is connected to the side of the second box 122 away from the first box 121 through a first thermally conductive adhesive, and the heating element 23 is connected to the side of the heating element 23 away from the second box 122 through a second thermally conductive adhesive. Along the arrangement direction of the heating element 23 and the second box 122, the size of the first thermally conductive adhesive is in the range of 0.1 mm to 3 mm, and along the arrangement direction of the heating element 23 and the second box 122, the size of the second thermally conductive adhesive is in the range of 0.1 mm to 3 mm.

[0290] In some examples of the present embodiment, the heating element 23 is a plate-shaped element, and an avoidance structure 231 is provided on the heating element 23. The heating element 23 is connected to the side of the second box body 122 facing away from the first box body 121 through a first thermally conductive adhesive. At least a portion of the heat exchange element 22 is embedded in the avoidance structure 231, and is connected to the side of the second box body 122 facing away from the first box body 121 through a second thermally conductive adhesive at the position of the avoidance structure 231. Along the arrangement direction of the heating element 23 and the second box body 122, the size of the first thermally conductive adhesive is in the range of 0.1 mm to 3 mm. Along the arrangement direction of the heating element 23 and the second box body 122, the size of the second thermally conductive adhesive is in the range of 0.1 mm to 3 mm. Such a configuration can further improve the structural strength of the connection position, so that the structural stability is effectively improved. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises: Box; A battery cell assembly, wherein the battery cell assembly is disposed in the box; A heat exchange component, wherein the heat exchange component is arranged outside the box and includes a heating element and a heat exchange element, the heating element is connected to the outer surface of the box and can at least heat the battery cell assembly, the heat exchange element is connected to the outer surface of the box and at least one of the heating element, and the heat exchange element is at least used to cool the battery cell assembly; the heating element includes a heating element and an insulating layer, the heating element is electrically connected to the battery cell assembly, and the insulating layer is provided on the outer surface of the heating element so that the heating element is insulated.

2. The battery device according to claim 1, characterized in that The box body comprises a first box body and a second box body, and the first box body is cover-connected with the second box body; The heat exchange component is arranged on a side of the first box away from the second box and exchanges heat with the battery monomer assembly through the first box, or the heat exchange component is arranged on a side of the second box away from the first box and exchanges heat with the battery monomer assembly through the second box.

3. The battery device according to claim 2, characterized in that: The first box is arranged on the top of the second box, and the heat exchange assembly is arranged on a side of the second box away from the first box; The heating element is connected to the second housing by bonding, welding, clamping or via a connecting piece, and the heat exchange element is connected to the second housing and / or the heating element by bonding, welding, clamping or via a connecting piece.

4. The battery device according to claim 3, characterized in that: The heat exchange assembly also includes a protective member, which is arranged on a side of the heat exchange member facing away from the second box body, and is connected to at least one of the second box body, the heating member and the heat exchange member, and the protective member shields at least part of the heat exchange member and at least part of the heating member.

5. The battery device according to claim 4, characterized in that: The protective member is connected to the second box body and encloses a storage space with the second box body. The heating element and at least part of the heat exchange element are arranged in the storage space. The protective member and the second box body are connected by bonding, welding, clamping or via a connecting member.

6. The battery device according to claim 5, characterized in that The heat exchange assembly further includes a first seal, which is disposed between the protective member and the second housing and seals a joining interface between the protective member and the second housing.

7. The battery device according to claim 6, characterized in that: The first sealing member is a sealing gasket or a sealing adhesive.

8. The battery device according to claim 4, characterized in that: The heat exchange assembly also includes a support member, which is arranged on a side of the protective member facing the second box body, one side of the support member abuts against the heating member and / or the heat exchange member, and the other side of the support member abuts against the protective member.

9. The battery device according to claim 8, characterized in that: The support member is in contact with the protection member, the heat exchange member forms a first projection on the protection member, the support member forms a second projection on the protection member, the shape of the first projection is consistent with the shape of the second projection, and the first projection is within the range of the second projection; And / or, the support member is a flexible member; And / or, the heating element includes a heating element, and the heating element is a metal element or a non-metal element.

10. The battery device according to claim 2, characterized in that: The battery device further comprises a plurality of electrical connection components, which are mounted on the box body. The heating element is an electric heating structure, and the heating element is electrically connected to the battery cell assembly via at least one of the electrical connection components.

11. The battery device according to claim 10, characterized in that: The box body is provided with vias having the same number as the electrical connection components, and each of the electrical connection components includes: A mounting seat, the mounting seat is connected to the box body and closes the via hole; A needle row is mounted on the mounting base and located at the location of the via hole, the needle row includes a plurality of needle bodies, a first end of each needle body is protruding from the inside of the box and is electrically connected to the battery cell assembly, and a second end of the needle body is protruding from the outside of the box and is electrically connected to the heating element.

12. The battery device according to claim 11, characterized in that The electrical connection assembly further includes a second seal, which is disposed between the mounting seat and the box body and seals a joining interface between the mounting seat and the box body.

13. The battery device according to claim 12, characterized in that: The second sealing member is a sealing gasket or a sealing adhesive; And / or, the connection between the mounting base and the box body includes bonding, welding, clamping or connection via a connecting piece.

14. The battery device according to claim 10, characterized in that: The battery device also includes a control device and a heating circuit, the heating circuit is electrically connected to the battery cell assembly, the heating element is connected to the heating circuit through at least one of the electrical connection components, the heating circuit includes a current detection element, the current detection element is used to detect the current in the heating circuit, the control device is electrically connected to the current detection element and is used to control the on and off of the heating circuit.

15. The battery device according to claim 14, characterized in that: The heating circuit further includes a fuse component, which is configured to be blown when a current of the heating circuit exceeds a preset current, so as to disconnect the heating circuit.

16. The battery device according to claim 10, characterized in that: The heating element is a plate-shaped element, and the power density of the heating element is 0.8W / cm 2 ~1.5W / cm 2 within the scope of And / or, the heating element is a plate-shaped element, and the flatness of the heating element is greater than or equal to 0 mm and less than or equal to 5 mm.

17. The battery device according to claim 10, characterized in that: The heat exchange element comprises a medium flow channel, and the medium flow channel is used to accommodate a heat exchange medium.

18. The battery device according to claim 17, characterized in that: The heat exchange component also includes a collecting piece, which is connected to the heat exchange piece. The collecting piece includes a collecting body, and the collecting body includes a first channel and a second channel spaced apart from each other. One end of the medium flow channel is connected to the first channel and allows heat exchange medium to flow in, and the other end of the medium flow channel is connected to the second channel and allows heat exchange medium to flow out.

19. The battery device according to claim 18, characterized in that The current collecting member further comprises a liquid inlet joint and a liquid outlet joint, wherein the liquid inlet joint is connected to the current collecting body and communicates with the first channel, and the liquid outlet joint is connected to the current collecting body and communicates with the second channel.

20. The battery device according to claim 18, wherein: The battery device further comprises a control device and a temperature detection element. The temperature detection element is electrically connected to the control device via an electrical connection assembly. The temperature detection element is at least used to detect the temperature of the heat exchange medium at the current collecting member position.

21. The battery device according to claim 20, characterized in that The heat exchange component also includes a protective member, which is arranged on a side of the heat exchange component away from the second box body and connected to the second box body. The battery device also includes a leakage detection element, which is electrically connected to the control device through an electrical connection component. The leakage detection element is at least used to detect whether there is leaked heat exchange medium on the protective member.

22. The battery device according to claim 17, wherein: The heat exchange element is a plate-shaped element or a tubular element.

23. The battery device according to claim 22, characterized in that The heat exchange element is a tubular element, and the tubular element is in a curved structure in the same plane.

24. The battery device according to claim 23, characterized in that The wall thickness of the tubular member is in the range of 0.3 mm to 2 mm; And / or, the flatness of the heating element is greater than or equal to 0 mm and less than or equal to 5 mm.

25. The battery device according to claim 17, wherein: The heat exchange element is a metal element, and an insulating coating is provided on the outer surface of the heat exchange element, and the insulating coating is used to insulate the heat exchange element.

26. The battery device according to claim 25, characterized in that The heat exchange component is made of copper, aluminum alloy or stainless steel.

27. The battery device according to any one of claims 3 to 16, characterized in that: The heating element is a plate-shaped element, and is connected to a side of the second box body away from the first box body through a first thermally conductive adhesive, and is connected to a side of the heating element away from the second box body through a second thermally conductive adhesive.

28. The battery device according to claim 27, characterized in that Along the arrangement direction of the heating element and the second box, the size of the first thermal conductive adhesive is in the range of 0.1 mm to 3 mm; And / or, along the arrangement direction of the heating element and the second box, the size of the second thermal conductive adhesive is in the range of 0.1 mm to 3 mm.

29. The battery device according to any one of claims 3 to 16, characterized in that: The heating element is a plate-shaped element, and an avoidance structure is provided on the heating element. The heating element is connected to the side of the second box body facing away from the first box body through a first thermally conductive adhesive. At least part of the heat exchange element is embedded in the avoidance structure and connected to the side of the second box body facing away from the first box body through a second thermally conductive adhesive at the position of the avoidance structure.

30. The battery device according to claim 29, characterized in that Along the arrangement direction of the heating element and the second box, the size of the first thermal conductive adhesive is in the range of 0.1 mm to 3 mm; And / or, along the arrangement direction of the heating element and the second box, the size of the second thermal conductive adhesive is in the range of 0.1 mm to 3 mm.

31. An electrical equipment, characterized in that: The electric device comprises the battery device according to claim 30.

Images