Battery, heat exchange box and electric device

Abstract

The utility model discloses a battery, a heat exchange box and an electric device. The battery comprises the heat exchange box, a first battery monomer and a second battery monomer, the heat exchange box comprises a box body and a heat exchange assembly arranged in the box body, a heat exchange cavity allowing heat exchange media to circulate is formed in the heat exchange assembly, a first containing groove is formed in the heat exchange assembly, and a second containing groove is formed between the heat exchange assembly and the box body. The first battery monomer is arranged in the first accommodating groove, and the second battery monomer is arranged in the second accommodating groove. The total heat exchange area of the groove wall of the first containing groove is larger than the total heat exchange area of the groove wall of the second containing groove. The first containing groove and the second containing groove which are different in total heat exchange area are formed in the heat exchange box and can contain the first battery monomer and the second battery monomer which are different in heat exchange temperature requirement, so that the heat exchange balance of the battery is improved, the energy utilization efficiency is improved, the overall heat exchange efficiency of the battery is improved, and meanwhile, the operation stability of the battery is improved.

Description

Technical Field

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

[0002] As natural resources are depleted, various fields have conducted in-depth research on devices that can store energy and effectively utilize the stored energy. Battery cells are widely used in renewable energy systems, battery systems, and existing power systems, and various resources are combined to transmit energy.

[0003] The temperature of the battery during operation has a great impact on the battery efficiency. When the battery temperature is too high or too low, the battery efficiency and capacity will decrease. Usually, a heat exchange device is set in the battery to adjust the battery temperature. How to improve the heat exchange efficiency of the heat exchange device is one of the research issues in this field. Utility Model Content

[0004] In view of the above problems, the present application provides a battery, a heat exchange box and an electrical device, which can improve the efficiency of battery heat exchange and improve the stability of battery operation.

[0005] In the first aspect, the present application provides a battery, including a heat exchange box, a first battery cell and a second battery cell. The heat exchange box includes a box body and a heat exchange assembly arranged in the box body, the heat exchange assembly is provided with a heat exchange flow channel for the circulation of a heat exchange medium, the heat exchange assembly is provided with a first receiving groove, and a second receiving groove is formed between the heat exchange assembly and the box body. The first battery cell is arranged in the first receiving groove, and the second battery cell is arranged in the second receiving groove. The total heat exchange area of ​​the groove wall of the first receiving groove is greater than the total heat exchange area of ​​the groove wall of the second receiving groove.

[0006] In the technical solution of the embodiment of the present application, a heat exchange box is provided to exchange heat between the first battery cell and the second battery cell, so as to ensure that the battery cell operates within a certain temperature range and improve the stability of the battery cell operation. In addition, a first receiving slot and a second receiving slot with different total heat exchange areas are provided in the heat exchange box, so as to accommodate the first battery cell and the second battery cell with different heat exchange temperature requirements, thereby improving the pertinence of the heat exchange of the heat exchange component, improving the heat exchange balance of the battery to improve the energy utilization efficiency, thereby improving the overall heat exchange efficiency of the battery, and at the same time improving the stability of the battery operation.

[0007] In some embodiments, the heat exchange assembly includes a first heat exchange plate and a second heat exchange plate, the first heat exchange plate has a first heat exchange surface and a second heat exchange surface relative to each other, the second heat exchange plate has a third heat exchange surface, and the third heat exchange surface is arranged opposite to the second heat exchange surface. A first receiving groove is formed between the second heat exchange surface and the third heat exchange surface, and a second receiving groove is formed between the first heat exchange surface and the box body. In the above structure, the relative arrangement of the first heat exchange plate and the second heat exchange plate can limit the first battery cell, and the relative arrangement of the first heat exchange plate and the box body can limit the second battery cell. The above structure improves the heat exchange efficiency of the first battery cell and the second battery cell, and at the same time can guide and limit the assembly process of the first battery cell and the second battery cell, thereby improving the assembly efficiency of the first battery cell and the second battery cell.

[0008] In some embodiments, the second heat exchange plate is further provided with a fourth heat exchange surface, which is arranged opposite to the third heat exchange surface, and a second receiving groove is formed between the fourth heat exchange surface and the box body. In the above structure, the fourth heat exchange surface is provided to exchange heat with the second battery cell with a lower heat exchange requirement, so as to adapt to battery cells with different heat exchange requirements, and the provision of two second receiving grooves can increase the number of second battery cells provided, thereby improving the energy density of the battery.

[0009] In some embodiments, the first heat exchange plate and the second heat exchange plate are arranged along the first direction, and the heat exchange assembly further includes a third heat exchange plate, which is connected between the first heat exchange plate and the second heat exchange plate, and is arranged at one end of the first heat exchange plate along the second direction, and the second direction intersects the first direction. The first heat exchange plate has a first flow channel, the second heat exchange plate has a second flow channel, and the third heat exchange plate has a third flow channel. The first flow channel, the second flow channel, and the third flow channel are interconnected, and the third heat exchange plate is provided with a medium inlet that flows with the third flow channel.

[0010] In the above technical solution, the first heat exchange plate and the second heat exchange plate are connected by setting a third heat exchange plate. The above structure can limit the first battery cell in the first direction and the second direction, thereby improving the structural stability of the first battery cell. The third flow channel is set in the third heat exchange plate to connect the first flow channel and the second flow channel, thereby improving the heat exchange efficiency, and the third heat exchange plate can exchange heat for the first battery cell in the second direction, thereby further improving the heat exchange efficiency. The medium inlet is set on the third heat exchange plate, thereby improving the convenience of connecting the medium inlet with the pipeline.

[0011] In some embodiments, the first heat exchange plate, the second heat exchange plate and the third heat exchange plate are integrally formed. The integrally formed structure improves the connection strength of the first heat exchange plate, the second heat exchange plate and the third heat exchange plate, improves the positioning accuracy of the first battery cell and the second battery cell, and improves the efficiency of production and assembly.

[0012] In some embodiments, the heat exchange assembly further includes a fourth heat exchange plate, which is arranged opposite to the third heat exchange plate in the second direction, a fourth flow channel is provided in the fourth heat exchange plate, the fourth flow channel is connected to the first flow channel and the second flow channel, and a medium outlet connected to the fourth flow channel is provided on the fourth heat exchange plate. In the above structure, the third flow channel is provided in the fourth heat exchange plate to connect the first flow channel and the second flow channel, thereby improving the heat exchange efficiency, and the fourth heat exchange plate can perform heat exchange on the first battery cell in the second direction, thereby further improving the heat exchange efficiency. An outlet is provided on the fourth heat exchange plate to guide the medium to flow in the second direction, thereby improving the flow speed of the medium.

[0013] In some embodiments, at least one of the second heat exchange surface and the third heat exchange surface is an arcuate heat exchange surface, the first battery cell is a cylindrical battery cell, and the arcuate heat exchange surface is used to exchange heat for the cylindrical battery cell. In the above structure, the second heat exchange surface and the third heat exchange surface are provided with an arcuate heat exchange surface, which can increase the heat exchange area in contact with the cylindrical battery cell, so as to improve the heat exchange efficiency of the heat exchange component to the cylindrical battery cell.

[0014] In some embodiments, the box body includes a plurality of side panels connected end to end in sequence and a bottom panel connected to the plurality of side panels, the plurality of side panels and the bottom panel together enclose a storage bin, the heat exchange assembly is disposed in the storage bin, and a limit assembly is disposed on the bottom panel, the limit assembly is used to limit the movement of the heat exchange assembly relative to the box body. In the above structure, the plurality of side panels and the bottom panel together enclose a storage bin, providing a stable space for the first battery cell, the second battery cell and the heat exchange assembly, thereby improving the stability of the operation of the first battery cell and the second battery cell. In addition, by providing a limit assembly in the box body, the assembly efficiency and positioning accuracy of the first battery cell and the second battery cell are improved.

[0015] In the second aspect, the present application provides a heat exchange box, including a box body and a heat exchange component arranged in the box body, a heat exchange flow channel for heat exchange medium to flow is arranged in the heat exchange component, a first receiving groove is arranged on the heat exchange component, a second receiving groove is formed between the heat exchange component and the box body, and the total heat exchange area of ​​the groove wall of the first receiving groove is greater than the total heat exchange area of ​​the groove wall of the second receiving groove. In the above structure, receiving grooves with different total heat exchange areas are arranged in the heat exchange box, which can accommodate battery cells with different heat exchange temperature requirements, improve the pertinence of heat exchange of battery cells, improve the heat exchange balance of batteries to improve energy utilization efficiency, thereby improving the overall heat exchange efficiency of the battery, and at the same time improving the stability of battery operation.

[0016] In a third aspect, the present application provides an electrical device, which includes the battery in the above embodiment, or the heat exchange box in the above embodiment, and the battery is used to provide electrical energy.

[0017] 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

[0018] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0019] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the exploded structure of a battery according to an embodiment of the present application;

[0021] Figure 3 This is a schematic structural diagram of a first battery cell according to an embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the structure of a heat exchange box according to an embodiment of the present application;

[0023] Figure 5 This is a schematic structural diagram of a heat exchange box according to another embodiment of the present application;

[0024] Figure 6 This is a schematic structural diagram of a heat exchange box according to another embodiment of the present application;

[0025] Figure 7 This is a schematic structural diagram of a heat exchange box according to another embodiment of the present application.

[0026] DETAILED DESCRIPTION OF REFERENCE NUMERALS

[0027] 1. Vehicle; X, first direction; Y, second direction; 2. Battery; 10. Electrode assembly; 20. Shell; 24. Pressure relief mechanism; 30. End cover; 40. Shell; 3. Controller; 4. Motor; 5. Box; 51. First part; 52. Second part; 53. Accommodation space; 6. Heat exchange box; 601. Box body; 602. Heat exchange assembly; 603. Heat exchange flow channel; 604. First accommodation tank; 605. Second accommodation tank ; 606, first heat exchange plate; 607, second heat exchange plate; 608, first heat exchange surface; 609, second heat exchange surface; 610, third heat exchange surface; 611, fourth heat exchange surface; 612, third heat exchange plate; 613, medium inlet; 614, fourth heat exchange plate; 615, medium outlet; 616, side plate; 617, bottom plate; 618, containing compartment; 619, fifth heat exchange plate; 7, first battery cell; 8, second battery cell. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present application will be 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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).

[0034] 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, which 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.

[0035] 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 those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 2 is provided inside the vehicle 1, and the battery 2 may be provided at the bottom, the head or the tail of the vehicle 1. The battery 2 may be used to power the vehicle 1, for example, the battery 2 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 3 and a motor 4, and the controller 3 is used to control the battery 2 to power the motor 4, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0037] In some embodiments of the present application, the battery 2 can be used not only as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0038] In some embodiments, the battery 2 may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0039] With the development of battery technology, people have put forward higher requirements on the heat exchange efficiency and energy density of batteries. Different battery cells usually have different performances. For example, ternary lithium battery cells have high energy density and good low temperature performance, while lithium iron phosphate battery cells have the advantages of low cost, good safety and long cycle life. Therefore, these two batteries can be combined and set in one battery at the same time to meet different needs at the same time. For example, ternary lithium batteries are used in situations where high energy density is required, and lithium iron phosphate batteries are used in situations where low cost or high safety is required. Therefore, the above setting is an effective battery system optimization solution that can better meet different needs and improve battery performance.

[0040] However, different battery cells have different efficiencies and different heat release rates. For example, ternary lithium battery cells release a large amount of heat and have a fast heating rate, while lithium iron phosphate battery cells release a relatively small amount of heat and have a slow heating rate. In order to adapt to the heat release rates of the above-mentioned different battery cells, the present application provides a battery, in which a heat exchange box is provided in the battery to perform heat exchange between the first battery cell and the second battery cell, to ensure that the battery cells operate within a certain temperature range, and to improve the stability of the battery cell operation. In addition, receiving slots with different total heat exchange areas are provided in the heat exchange box to accommodate battery cells with different heat exchange temperature requirements, thereby improving the targeted heat exchange of the battery cells, improving the heat exchange balance of the battery to improve the energy utilization efficiency, thereby improving the overall heat exchange efficiency of the battery, and at the same time enhancing the stability of the battery operation.

[0041] Please refer to Figure 2 , Figure 2 An exploded diagram of a battery provided for some embodiments of the present application. The battery includes a heat exchange box, a first battery cell and a second battery cell. The heat exchange box includes a box body and a heat exchange component disposed in the box body, a heat exchange flow channel for the circulation of a heat exchange medium is disposed in the heat exchange component, a first receiving groove is disposed on the heat exchange component, and a second receiving groove is formed between the heat exchange component and the box body. The first battery cell is disposed in the first receiving groove, and the second battery cell is disposed in the second receiving groove. The total heat exchange area of ​​the groove wall of the first receiving groove is greater than the total heat exchange area of ​​the groove wall of the second receiving groove.

[0042] In some optional embodiments, heat exchange plates are disposed on two opposite sides of the first receiving tank, and a heat exchange plate is disposed on one side of the second receiving tank. When the heat exchange areas of the heat exchange plates are equal, the total heat exchange area of ​​the first receiving tank is greater than the total heat exchange area of ​​the second receiving tank.

[0043] In the technical solution of the embodiment of the present application, a heat exchange box is provided to exchange heat between the first battery cell and the second battery cell, so as to ensure that the battery cell operates within a certain temperature range and improve the stability of the battery cell operation. In addition, a first receiving slot and a second receiving slot with different total heat exchange areas are provided in the heat exchange box, so as to accommodate the first battery cell and the second battery cell with different heat exchange temperature requirements, improve the pertinence of the heat exchange of the heat exchange component, improve the heat exchange balance of the battery to improve the energy utilization efficiency, thereby improving the overall heat exchange efficiency of the battery, and at the same time improving the stability of the battery operation. In some optional embodiments, the box body 5 can adopt a variety of structures. Exemplarily, the box body 5 includes a first part 51 and a second part 52, the first part 51 and the second part 52 cover each other, and the first part 51 and the second part 52 jointly define a receiving space 53 for accommodating the first battery cell 7 and the second battery cell 8. The second part 52 may be a hollow structure with one end open, and the first part 51 may be a plate-like structure, and the first part 51 covers the open side of the second part 52, so that the first part 51 and the second part 52 jointly define a receiving space 53; the first part 51 and the second part 52 may also be hollow structures with one side open, and the open side of the first part 51 covers the open side of the second part 52. Of course, the box body 5 formed by the first part 51 and the second part 52 may be in various shapes, such as a cylinder, a cuboid, etc.

[0044] In some embodiments, the box 5 can be used as part of the chassis structure of the vehicle 1. For example, part of the box 5 can become at least a part of the floor of the vehicle 1, or part of the box 5 can become at least a part of the cross beam and longitudinal beam of the vehicle 1.

[0045] In the battery, both the first battery cell 7 and the second battery cell 8 can be multiple. Exemplarily, the multiple first battery cells 7 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple first battery cells 7 are both connected in series and in parallel. The multiple first battery cells 7 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple first battery cells 7 is accommodated in the box body 5. Of course, the battery 2 can also be a battery module in which multiple first battery cells 7 are first connected in series, in parallel, or in mixed connection, and the multiple battery modules are then connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box body 5. The battery 2 can also include other structures. For example, the battery 2 can also include a confluence component for realizing electrical connection between the multiple first battery cells 7. It can be understood that the second battery cell 8 can also be connected through the above structure, which will not be repeated here.

[0046] Please refer to Figure 3 , Figure 3This is a schematic diagram of the structure of the first battery cell 7 provided in one embodiment of the present application. It is understandable that when the second battery cell 8 is a square battery, its structure is the same as that of the first battery cell 7, and no repeated description is given here. Figure 3 The first battery cell 7 includes a housing 40 , an electrode assembly 10 and other functional components.

[0047] The housing 40 is provided with a receiving cavity, and the electrode assembly 10 is provided in the housing 40. The electrode assembly 10 includes a main body and a tab extending from the main body. The main body may include a portion of the positive electrode sheet coated with an active material layer, a component of the negative electrode sheet coated with an active material layer, and a separator. The active material in the active material layer is used to react with the electrolyte to achieve charging and discharging.

[0048] The housing 40 is a component for accommodating the electrode assembly 10. The housing 40 can be made of various materials, such as copper, iron, aluminum, steel, and aluminum alloy. The housing 40 can be in various shapes, such as a cylinder, a cuboid, etc. The housing 40 in the exemplary figure is a cylinder.

[0049] Exemplarily, the housing 40 may include an end cap 30 and a shell 20. The end cap 30 refers to a component that covers the opening of the shell 20 to isolate the internal environment of the first battery cell 7 from the external environment. Without limitation, the shape of the end cap 30 may be adapted to the shape of the shell 20 to match the shell 20. Optionally, the end cap 30 may be made of a material with a certain hardness and strength (such as an aluminum alloy), so that the end cap 30 is not easily deformed when it is squeezed and collided, so that the first battery cell 7 can have a higher structural strength and the safety performance can also be improved.

[0050] In some embodiments, the end cap 30 may also be provided with a pressure relief mechanism 24 for releasing the internal pressure when the internal pressure or temperature of the first battery cell 7 reaches a threshold value. The material of the end cap 30 may also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiments of the present application. In some embodiments, an insulating component may also be provided on the inner side of the end cap 30, and the insulating component may be used to isolate the electrical connection components in the housing 20 from the end cap 30 to reduce the risk of short circuit. Exemplarily, the insulating component may be plastic, rubber, etc.

[0051] The housing 20 is a component used to cooperate with the end cap 30 to form the internal environment of the first battery cell 7. The formed internal environment can be used to accommodate the electrode assembly 10, the electrolyte and other components. The housing 20 and the end cap 30 can be independent components, and an opening can be set on the housing 20, and the internal environment of the first battery cell 7 is formed by covering the opening with the end cap 30.

[0052] In some optional embodiments, the end cap 30 and the shell 20 can also be integrated. Specifically, the end cap 30 and the shell 20 can form a common connection surface before other components are put into the shell. When the interior of the shell 20 needs to be encapsulated, the end cap 30 is covered with the shell 20. The shell 20 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 20 can be determined according to the specific shape and size of the electrode assembly 10. The material of the shell 20 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0053] The electrode assembly 10 is a component in the battery cell where electrochemical reactions occur. Taking the first battery cell 7 as an example, one or more electrode assemblies 10 may be included in the housing 20. The electrode assembly 10 includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the first battery cell 7, active ions (such as lithium ions) are embedded 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 active ions to pass through.

[0054] In some embodiments, the separator is a separator. The present application has no particular restrictions on the type of separator, and any known porous separator with good chemical stability and mechanical stability can be selected. 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.

[0055] 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.

[0056] In some embodiments, the first battery cell 7 and the second battery cell 8 also include an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0057] like Figure 4 as well as Figure 5 As shown, in some embodiments of the present application, the heat exchange assembly 602 includes a first heat exchange plate 606 and a second heat exchange plate 607, the first heat exchange plate 606 has a first heat exchange surface 608 and a second heat exchange surface 609 opposite to each other, the second heat exchange plate 607 has a third heat exchange surface 610, and the third heat exchange surface 610 is arranged opposite to the second heat exchange surface 609. A first receiving groove 604 is formed between the second heat exchange surface 609 and the third heat exchange surface 610, and a second receiving groove is formed between the first heat exchange surface 608 and the box body 601.

[0058] In the above structure, the first heat exchange plate 606 and the second heat exchange plate 607 are relatively arranged to limit the first battery cell 7, and the first heat exchange plate 606 and the box body 601 are relatively arranged to limit the second battery cell 8. In addition, the heat exchange efficiency of the first battery cell 7 and the second battery cell 8 is improved, and at the same time, the assembly process of the first battery cell 7 and the second battery cell 8 can be guided and limited, thereby improving the assembly efficiency of the first battery cell 7 and the second battery cell 8.

[0059] In some embodiments of the present application, the second heat exchange plate 607 is further provided with a fourth heat exchange surface 611, which is arranged opposite to the third heat exchange surface 610, and a second receiving groove 605 is formed between the fourth heat exchange surface 611 and the box body 601. In the above structure, the fourth heat exchange surface 611 is provided to exchange heat with the second battery cell 8 with a lower heat exchange requirement, so as to adapt to battery cells with different heat exchange requirements, and at the same time, two second receiving grooves 605 are provided to increase the number of second battery cells 8, thereby improving the positioning accuracy of the second battery cell 8 and the energy density of the battery 2.

[0060] In some embodiments of the present application, the first heat exchange plate 606 and the second heat exchange plate 607 are arranged along the first direction X, and the heat exchange assembly 602 further includes a third heat exchange plate 612, which is connected between the first heat exchange plate 606 and the second heat exchange plate 607, and is arranged at one end of the first heat exchange plate 606 along the second direction Y, and the second direction Y intersects the first direction X. The first heat exchange plate 606 has a first flow channel, the second heat exchange plate 607 has a second flow channel, and the third heat exchange plate 612 has a third flow channel, the first flow channel, the second flow channel and the third flow channel are interconnected, and the third heat exchange plate 612 is provided with a medium inlet 613 that flows with the third flow channel.

[0061] Optionally, the first flow channel is a cavity formed inside the first heat exchange plate 606, and its shape is not limited, and it can be a columnar or rectangular cavity, and its flow direction can be a straight line or a curve. Exemplarily, the overall flow direction of the first flow channel is from one side of the first heat exchange plate 606 to the other side.

[0062] In the above technical solution, the first heat exchange plate 606 and the second heat exchange plate 607 are connected by setting the third heat exchange plate 612. The above structure can limit the first battery cell 7 in the first direction X and the second direction Y, thereby improving the structural stability of the first battery cell 7. The third flow channel is set in the third heat exchange plate 612 to connect the first flow channel and the second flow channel, thereby improving the heat exchange efficiency, and the third heat exchange plate 612 can exchange heat for the first battery cell 7 on one side of the second direction Y, thereby further improving the heat exchange efficiency. The medium inlet 613 is set on the third heat exchange plate 612, thereby improving the convenience of connecting the medium inlet 613 with the pipeline.

[0063] In some embodiments of the present application, the first heat exchange plate 606, the second heat exchange plate 607 and the third heat exchange plate 612 are integrally formed. Exemplarily, the first heat exchange plate 606, the second heat exchange plate 607 and the third heat exchange plate 612 are integrally formed, which means that during the manufacturing process, the first heat exchange plate 606, the second heat exchange plate 607 and the third heat exchange plate 612 are molded into a whole at one time, rather than combining two independent structures together by welding, screws and other connection methods. This manufacturing method can reduce the number of connection points, improve the overall strength and stability of the structure, and also reduce production costs and time.

[0064] Therefore, the above technical solution improves the connection strength of the first heat exchange plate 606, the second heat exchange plate 607 and the third heat exchange plate 612, and improves the positioning accuracy of the first battery cell 7 and the second battery cell 8, while improving the production and assembly efficiency thereof.

[0065] like Figure 6 As shown, in some embodiments of the present application, the heat exchange component 602 also includes a fourth heat exchange plate 614, and the fourth heat exchange plate 614 is arranged relative to the third heat exchange plate 612 along the second direction Y. A fourth flow channel is provided in the fourth heat exchange plate 614, and the fourth flow channel is connected to the first flow channel and the second flow channel. The fourth heat exchange plate 614 is provided with a medium outlet 615 connected to the fourth flow channel.

[0066] In the above structure, the third flow channel is provided in the fourth heat exchange plate 614 to connect the first flow channel and the second flow channel, thereby improving the heat exchange efficiency, and the fourth heat exchange plate 614 can exchange heat for the first battery cell 7 on one side of the second direction Y, thereby further improving the heat exchange efficiency. An outlet is provided on the fourth heat exchange plate 614 to guide the medium to flow along the second direction Y, thereby improving the flow speed of the medium.

[0067] In some optional embodiments, the fourth heat exchange plate 614 is an integrally formed structure with the first heat exchange plate 606 and the second heat exchange plate 607. The above technical solution improves the connection strength of the first heat exchange plate 606, the second heat exchange plate 607 and the fourth heat exchange plate 614, and improves the positioning accuracy of the first battery cell 7 and the second battery cell 8, while improving the production and assembly efficiency.

[0068] In some optional embodiments, the heat exchange assembly 602 further includes a fifth heat exchange plate 619, which is disposed between the third heat exchange plate 612 and the fourth heat exchange plate 614, and is connected to the first heat exchange plate 606 and the second heat exchange plate 607. A fifth flow channel is disposed in the fifth heat exchange plate 619, and the fifth flow channel is connected to the first flow channel and the second flow channel. The fifth heat exchange plate 619 divides the first receiving tank 604 into two parts, and the first battery cell 7 can be disposed in both parts. The fifth heat exchange plate 619 can increase the number of first battery cells 7, improve the intercommunication of the fluids in the first flow channel and the second flow channel, and improve the heat exchange balance.

[0069] like Figure 7 As shown, in some embodiments of the present application, at least one of the second heat exchange surface 609 and the third heat exchange surface 610 is a curved heat exchange surface, the first battery cell 7 is a cylindrical battery cell, and the curved heat exchange surface is used to exchange heat for the cylindrical battery cell. In the above structure, the second heat exchange surface 609 and the third heat exchange surface 610 are provided with a curved heat exchange surface, which can increase the heat exchange area in contact with the cylindrical battery cell, so as to improve the heat exchange efficiency of the heat exchange component 602 for the cylindrical battery cell.

[0070] In some optional embodiments, at least one of the first heat exchange surface 608 or the fourth heat exchange surface 611 is a curved heat exchange surface, the second battery cell 8 is a cylindrical battery cell, and the curved heat exchange surface is used to exchange heat for the cylindrical battery cell. In the above structure, the first heat exchange surface 608 or the fourth heat exchange surface 611 is provided with a curved heat exchange surface, which can increase the heat exchange area in contact with the cylindrical battery cell, so as to improve the heat exchange efficiency of the heat exchange component 602 for the cylindrical battery cell.

[0071] In some optional embodiments, the first flow channel, the second flow channel, the third flow channel, and the fourth flow channel are interconnected to form a heat exchange flow channel 603 of the heat exchange component 602 .

[0072] like Figure 4 as well as Figure 7As shown, in some embodiments of the present application, the box body 601 includes a plurality of side panels 616 connected end to end and a bottom plate 617 connected to the plurality of side panels 616, the plurality of side panels 616 and the bottom plate 617 together enclose a containing bin 618, the heat exchange component 602 is disposed in the containing bin 618, and a limit assembly is provided on the bottom plate 617, the limit assembly is used to limit the movement of the heat exchange component 602 relative to the box body 601.

[0073] In the above structure, a plurality of side panels 616 and a bottom panel 617 are enclosed together to form a storage compartment 618, which provides a stable space for the first battery cell 7, the second battery cell 8 and the heat exchange assembly 602, thereby improving the operating stability of the first battery cell 7 and the second battery cell 8. In addition, by providing a limit assembly in the box body 601, the assembly efficiency and positioning accuracy of the first battery cell 7 and the second battery cell 8 are improved.

[0074] In some optional embodiments, a heat exchange channel is also provided in the side plate 616 for allowing the heat exchange medium to flow. By providing the heat exchange channel in the side plate 616, the total heat exchange area of ​​the second receiving tank 605 is further increased, and the heat exchange efficiency of the second battery cell 8 is improved.

[0075] In some optional embodiments, a heat exchange channel is provided in the bottom plate 617, and the channel is used for the heat exchange medium to flow. By providing the heat exchange channel in the bottom plate 617, the total heat exchange area of ​​the first receiving tank 604 and the second receiving tank 605 is increased, and the heat exchange efficiency of the first battery cell 7 and the second battery cell 8 is improved.

[0076] Please refer to Figures 4 to 7 An embodiment of the present application provides a heat exchange box 6, including a box body 601 and a heat exchange component 602 arranged in the box body 601, a heat exchange flow channel 603 for the circulation of heat exchange medium is provided in the heat exchange component 602, a first receiving groove 604 is provided on the heat exchange component 602, and a second receiving groove 605 is formed between the heat exchange component 602 and the box body 601, and the total heat exchange area of ​​the groove wall of the first receiving groove 604 is greater than the total heat exchange area of ​​the groove wall of the second receiving groove 605.

[0077] In the above structure, receiving slots with different total heat exchange areas are arranged in the heat exchange box 6, which can accommodate battery cells with different heat exchange temperature requirements, improve the targeted heat exchange, improve the heat exchange balance of the battery 2 to improve the energy utilization efficiency, thereby improving the overall heat exchange efficiency of the battery 2, and at the same time improve the stability of the operation of the battery 2.

[0078] The embodiments of the present application also provide an electrical device, which includes the battery 2 in the above embodiment, or the heat exchange box 6 in the above embodiment, and the battery 2 is used to provide electrical energy. The heat exchange box 6 is provided to perform heat exchange on the first battery cell 7 and the second battery cell 8, so that the first battery cell 7 and the second battery cell 8 operate within a certain temperature range, thereby improving the stability of the battery cell operation. In addition, a first receiving slot 604 and a second receiving slot 605 with different total heat exchange areas are provided in the heat exchange box 6, which can be used to accommodate the first battery cell 7 and the second battery cell 8 with different heat exchange temperature requirements, respectively, thereby improving the targeted heat exchange of the heat exchange component 602, improving the heat exchange balance of the battery 2 to improve the energy utilization efficiency, thereby improving the overall heat exchange efficiency of the battery 2, and at the same time improving the stability of the operation of the battery 2.

[0079] 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 (2), characterized in that: include: A heat exchange box (6), comprising a box body (601) and a heat exchange component (602) arranged in the box body (601), wherein a heat exchange flow channel (603) for heat exchange medium to flow is arranged in the heat exchange component (602), a first receiving groove (604) is arranged on the heat exchange component (602), and a second receiving groove (605) is formed between the heat exchange component (602) and the box body (601); A first battery cell (7) is disposed in the first receiving groove (604); A second battery cell (8) is disposed in the second receiving groove (605), Wherein, the total heat exchange area of ​​the groove wall of the first containing groove (604) is greater than the total heat exchange area of ​​the groove wall of the second containing groove (605).

2. The battery (2) according to claim 1, characterized in that The heat exchange component (602) comprises: A first heat exchange plate (606) having a first heat exchange surface (608) and a second heat exchange surface (609) opposite to each other; The second heat exchange plate (607) has a third heat exchange surface (610), and the third heat exchange surface (610) is arranged opposite to the second heat exchange surface (609). The first receiving groove (604) is formed between the second heat exchange surface (609) and the third heat exchange surface (610), and the second receiving groove (605) is formed between the first heat exchange surface (608) and the box body (601).

3. The battery (2) according to claim 2, characterized in that: The second heat exchange plate (607) is further provided with a fourth heat exchange surface (611), and the fourth heat exchange surface (611) is arranged opposite to the third heat exchange surface (610), and the second receiving groove (605) is formed between the fourth heat exchange surface (611) and the box body (601).

4. The battery (2) according to claim 2, characterized in that The first heat exchange plate (606) and the second heat exchange plate (607) are arranged along a first direction (X), and the heat exchange assembly (602) further includes a third heat exchange plate (612), the third heat exchange plate (612) is connected between the first heat exchange plate (606) and the second heat exchange plate (607), and the third heat exchange plate (612) is arranged at one end of the first heat exchange plate (606) along a second direction (Y), and the second direction (Y) intersects with the first direction (X). The first heat exchange plate (606) has a first flow channel, the second heat exchange plate (607) has a second flow channel, and the third heat exchange plate (612) has a third flow channel. The first flow channel, the second flow channel, and the third flow channel are interconnected, and the third heat exchange plate (612) is provided with a medium inlet (613) that flows with the third flow channel.

5. The battery (2) according to claim 4, characterized in that The first heat exchange plate (606), the second heat exchange plate (607) and the third heat exchange plate (612) are an integrally formed structure.

6. The battery (2) according to claim 4, characterized in that The heat exchange assembly (602) further includes a fourth heat exchange plate (614), wherein the fourth heat exchange plate (614) and the third heat exchange plate (612) are arranged opposite to each other along the second direction (Y), wherein a fourth flow channel is provided in the fourth heat exchange plate (614), wherein the fourth flow channel is connected to the first flow channel and the second flow channel, and wherein a medium outlet (615) connected to the fourth flow channel is provided on the fourth heat exchange plate (614).

7. The battery (2) according to any one of claims 2 to 6, characterized in that: At least one of the second heat exchange surface (609) and the third heat exchange surface (610) is an arcuate heat exchange surface, the first battery cell (7) is a cylindrical battery (2) cell, and the arcuate heat exchange surface is used for heat exchange for the cylindrical battery (2) cell.

8. The battery (2) according to any one of claims 1 to 6, characterized in that: The box body (601) includes a plurality of side panels (616) connected end to end in sequence and a bottom plate (617) connected to the plurality of side panels (616); the plurality of side panels (616) and the bottom plate (617) together enclose a containing bin (618); the heat exchange component (602) is disposed in the containing bin (618), and a limit component is provided on the bottom plate (617); the limit component is used to limit the movement of the heat exchange component (602) relative to the box body (601).

9. A heat exchange box (6), characterized in that: The invention comprises a box body (601) and a heat exchange component (602) arranged in the box body (601), wherein the heat exchange component (602) is provided with a heat exchange channel (603) for circulating a heat exchange medium, and the heat exchange component (602) is provided with a first receiving groove (604), and a second receiving groove (605) is formed between the heat exchange component (602) and the box body (601), and the total heat exchange area of ​​the groove wall of the first receiving groove (604) is greater than the total heat exchange area of ​​the groove wall of the second receiving groove (605).

10. An electrical device, characterized in that: The electrical device comprises: a battery (2) as claimed in any one of claims 1 to 8, or a heat exchange box (6) as claimed in claim 9, wherein the battery (2) is used to provide electrical energy.

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