Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, and belongs to the technical field of batteries. The battery device comprises a box body; the plurality of single batteries are arranged in the box body, and each single battery is provided with a pole; the at least one temperature equalizing piece is arranged in the box body; wherein the pole columns of at least two battery monomers are in insulated connection with the same temperature equalizing piece, the temperature equalizing piece is used for transferring heat among the pole columns connected with the temperature equalizing piece, the temperature equalizing piece comprises a shell and a capillary structure, the shell is provided with a temperature equalizing cavity, and the temperature equalizing cavity is filled with a temperature equalizing medium; the capillary structure is arranged in the temperature equalizing cavity; and the uniform-temperature medium is a phase-change material, so that the temperatures between the poles of different battery monomers are balanced, the temperatures of the poles of the different battery monomers are close to the temperature level, and the service life of the battery device is further prolonged.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery device technology is an important factor related to their development.

[0003] However, during the use of the battery device, due to the individual differences of the battery cells, the temperature of the poles of different battery cells will also be different, and the temperature difference between the battery cells will lead to differences in the life and performance of the battery cells, thereby affecting the performance and life of the entire battery device. Therefore, how to improve the service life of the battery device is a technical problem that needs to be solved in the battery device technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical equipment to balance the temperature between the poles, thereby increasing the service life of the battery device.

[0005] In a first aspect, the present application provides a battery device, comprising:

[0006] Box;

[0007] A plurality of battery cells are disposed in the box, each of the battery cells being provided with a pole; and

[0008] At least one temperature-averaging component is disposed in the box;

[0009] Wherein, at least two poles of the battery cells are insulated and connected to the same temperature-averaging component, and the temperature-averaging component is used to transfer heat between the poles connected thereto;

[0010] The temperature-averaging component comprises a shell and a capillary structure, the shell is provided with a temperature-averaging cavity, and the temperature-averaging cavity is filled with a temperature-averaging medium;

[0011] The capillary structure is arranged in the temperature-averaging cavity;

[0012] The temperature-uniform medium is a phase-change material.

[0013] In the technical solution of the embodiment of the present application, the poles of different battery cells are insulated and connected to the same temperature equalizing component, so that heat can be transferred between the poles of different battery cells through the temperature equalizing component, so that the heat of the pole with a higher temperature is transferred from the temperature equalizing component to the pole with a lower temperature, and the temperature between the poles of different battery cells is balanced, so that the pole temperatures of different battery cells are at a similar temperature level, thereby improving the service life of the battery device. At the same time, through the phase change and flow of the temperature equalizing medium in the temperature equalizing cavity between the capillary structures, the high temperature is transferred to the low temperature, and then the heat of the pole with a higher temperature is transferred from the temperature equalizing component to the pole with a lower temperature, and the temperature between the poles of different battery cells is balanced.

[0014] In some embodiments, the temperature equalizing element is a heat pipe.

[0015] The temperature equalizing element is made of a heat pipe, so that the structure of the heat pipe itself can be utilized to achieve the effect of equalizing the temperature between the poles.

[0016] In some embodiments, each of the battery cells is provided with a first pole and a second pole;

[0017] The plurality of battery cells are arranged in at least one row, the first poles of the battery cells in the same row are arranged in one row, and the second poles of the battery cells in the same row are arranged in one row;

[0018] The temperature-averaging element comprises a first temperature-averaging element and a second temperature-averaging element;

[0019] At least two of the first poles in the same column are insulated and connected to the same first temperature equalizing member, and at least two of the second poles in the same column are insulated and connected to the same second temperature equalizing member.

[0020] By arranging the first poles of the battery cells in the same column into a row, and making at least two of the first poles in the same column insulated and connected to the same first temperature equalizing member, heat can be transferred between the first poles of different battery cells through the first temperature equalizing member, and the temperature between the first poles of different battery cells is balanced. Similarly, by arranging the second poles of the battery cells in the same column into a row, and making at least two of the second poles in the same column insulated and connected to the same second temperature equalizing member, heat can be transferred between the second poles of different battery cells through the second temperature equalizing member, and the temperature between the second poles of different battery cells is balanced.

[0021] In some embodiments, the battery device further includes a first busbar and a second busbar;

[0022] The first pole comprises a first end face and a first side face, the first current collector is connected to the first end face, the first temperature equalizing member is insulatedly connected to the first side face, and the first side face intersects with the first end face;

[0023] The second pole includes a second end surface and a second side surface, the second current collector is connected to the second end surface, the second temperature equalizing member is insulatedly connected to the second side surface, and the second side surface intersects with the second end surface.

[0024] By connecting the first current collector to the first end face of the first pole and connecting the first temperature-averaging member to the first side face of the first pole, the first temperature-averaging member can be arranged on the side of the first current collector close to the first pole. At the same time, since the first temperature-averaging member and the first pole are insulated, the occurrence of short circuit can be reduced. Similarly, by connecting the second current collector to the second end face of the second pole and connecting the second temperature-averaging member to the second side face of the second pole, the second temperature-averaging member can be arranged on the side of the second current collector close to the second pole. At the same time, since the second temperature-averaging member and the second pole are insulated, the occurrence of short circuit can be reduced.

[0025] In some embodiments, the first temperature-averaging component is insulated and connected to the first current collector, and the second temperature-averaging component is insulated and connected to the second current collector.

[0026] By making the first temperature-averaging member and the first current collector insulated and connected, the occurrence of short circuit phenomenon is reduced when the first temperature-averaging member and the first current collector are connected. By making the second temperature-averaging member and the second current collector insulated and connected, the occurrence of short circuit phenomenon is reduced when the second temperature-averaging member and the second current collector are connected.

[0027] In some embodiments, each of the battery cells is provided with a first pole and a second pole;

[0028] The plurality of battery cells are arranged in at least one row, the first poles of the battery cells in the same row are arranged in one row, and the second poles of the battery cells in the same row are arranged in one row;

[0029] The battery device further includes a first busbar and a second busbar, wherein the first busbar is connected to the first pole, and the second busbar is connected to the second pole;

[0030] The temperature-averaging element comprises a first temperature-averaging element and a second temperature-averaging element;

[0031] The same first temperature-averaging component is insulated and connected to at least two of the first current collectors, and the same second temperature-averaging component is insulated and connected to at least two of the second current collectors.

[0032] By arranging the first poles of the battery cells in the same column into a row, connecting the first busbar with the first poles, and making the same first temperature-averaging component insulated from at least two first busbars, heat can be transferred between different first busbars through the first temperature-averaging component, and then heat can be transferred between different first poles, and the temperature between the first poles of different battery cells can be balanced. Similarly, by arranging the second poles of the battery cells in the same column into a row, connecting the second busbar with the second poles, and making the same second temperature-averaging component insulated from at least two second busbars, heat can be transferred between different second busbars through the second temperature-averaging component, and then heat can be transferred between different second poles, and the temperature between the second poles of different battery cells can be balanced.

[0033] In some embodiments, the first temperature-averaging member is located on a side of the first current collector facing away from the first pole, and the second temperature-averaging member is located on a side of the second current collector facing away from the second pole.

[0034] The first and second temperature averaging members are positioned on the battery device by arranging the first temperature averaging member on the side of the first current collector facing away from the first pole and arranging the second temperature averaging member on the side of the second current collector facing away from the second pole.

[0035] In some embodiments, a plurality of the temperature-averaging components are provided, and the plurality of the temperature-averaging components are connected in series or in parallel.

[0036] When multiple temperature-averaging components are provided, the multiple temperature-averaging components can be connected in series or in parallel to each other, so as to be integrated into one temperature-averaging component, which can reduce the number of parts of the battery device and achieve temperature uniformity between more poles through one temperature-averaging component.

[0037] In some embodiments, the temperature equalizer is thermally connected to the box.

[0038] By thermally connecting the temperature-averaging component to the box body, the heat of the temperature-averaging component can be transferred to the box body, and then the heat is dissipated into the outside air through the box body.

[0039] In some embodiments, the battery device further includes a thermal management component, the thermal management component is disposed in the box, and the temperature equalizer is thermally connected to the thermal management component.

[0040] By arranging a thermal management component in the box and thermally connecting the temperature equalizing component to the thermal management component, the heat of the temperature equalizing component can be transferred to the thermal management component, and then the heat is dissipated through the thermal management component.

[0041] In a second aspect, the present application provides an electrical device, which includes the battery device in the above embodiment.

[0042] The electrical equipment provided in the present application includes the battery device described in any one of the embodiments of the first aspect, and thus has the technical effects described in any one of the embodiments above, which will not be described in detail herein.

[0043] 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, which can be implemented in accordance with the contents of the specification, and to make 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

[0044] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0045] Figure 1 A schematic diagram of the structure of a vehicle in some embodiments of the present application;

[0046] Figure 2 is a schematic diagram of the exploded structure of a battery device in some embodiments of the present application;

[0047] Figure 3 A schematic diagram of the exploded structure of a battery cell in some embodiments of the present application;

[0048] Figure 4 It is a schematic diagram of assembling a temperature balancing member and a battery cell in a battery device in some embodiments of the present application;

[0049] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0050] Figure 6 Another schematic diagram of assembling a temperature balancing member and a battery cell in a battery device in some embodiments of the present application;

[0051] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle;

[0052] Figure 8 This is a schematic diagram of the structure of a temperature equalizing member in a battery device in some embodiments of the present application;

[0053] Fig. 9 Schematic diagram of the exploded structure of the battery device in some other embodiments of the present application.

[0054] The reference numerals in the specific implementation manner are as follows:

[0055] 1000. Vehicles;

[0056] 100, battery device; 200, controller; 300, motor;

[0057] 10. Box body; 11. First part; 12. Second part;

[0058] 20. Battery cell; 21. End cover; 22. Shell; 23. Cell assembly; 24. Post; 24a. First post; 241a. First end face; 242a. First side face; 24b. Second post; 241b. Second end face; 242b. Second side face;

[0059] 30, temperature-averaging element; 30a, first temperature-averaging element; 30b, second temperature-averaging element; 31, housing; 311, temperature-averaging chamber; 32, liquid-absorbing core;

[0060] 40. A first busbar;

[0061] 50. A second busbar;

[0062] 60. Thermal management components. DETAILED DESCRIPTION

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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).

[0068] 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.

[0069] 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.

[0070] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries 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 power batteries, the market demand is also constantly expanding.

[0071] At the same time, with the rapid development of new energy vehicles, the market share of new energy vehicles is getting higher and higher. How to quickly and efficiently achieve energy replenishment is an urgent problem to be solved in the new energy vehicle industry. As a mainstream solution for new energy vehicles to achieve rapid energy replenishment, power battery fast charging has encountered many challenges in the implementation process.

[0072] First of all, the battery cells of the power battery will generate a lot of heat at the pole during the fast charging process, which will cause the local temperature of the battery to rise sharply, and then seriously affect the performance and service life of the battery, and even cause major safety hazards during the use of the battery, which is not conducive to the safety of consumers.

[0073] Secondly, the rapid discharge of the power battery in high-performance mode will also cause the temperature of the battery cell pole to rise rapidly. Due to the individual differences of the battery cells, the temperature of the poles of different battery cells will also be different, and the temperature difference between battery cells will lead to differences in the life and performance of the battery cells, thus affecting the performance and life of the entire power battery.

[0074] In order to reduce the temperature difference between battery cells, research has found that a temperature equalization structure can be set between battery cells to balance the temperature between battery cells, so that different battery cells are at a similar temperature level, thereby improving the performance and service life of the power battery.

[0075] Based on the above considerations, in order to solve the problem that the performance and life of the battery device are reduced due to the temperature difference between the battery cell poles during use, a battery cell is designed, so that the poles of different battery cells are insulated and connected to the same temperature equalizing component, so that heat can be transferred between the poles of different battery cells through the temperature equalizing component, and the heat of the higher temperature pole is transferred from the temperature equalizing component to the lower temperature pole, so as to balance the pole temperature of different battery cells, make the pole temperature of different battery cells at a close temperature level, and thereby improve the service life of the battery device.

[0076] The battery device disclosed in the embodiment of the present application can be used in, but not limited to, electrical equipment such as vehicles, ships or aircraft. The power supply system of the electrical equipment can be composed of the battery device disclosed in the present application.

[0077] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles and spacecraft, etc.

[0078] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0079] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 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 device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used for powering the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000, or, may be used for the circuit system of the vehicle 1000, for example, for the working power requirements during the startup, navigation and operation of the vehicle 1000.

[0080] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery device 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0081] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0082] Please refer to Figure 2 , Figure 2 The exploded view of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is accommodated in the box body 10. The box body 10 is used to provide a storage space for the battery cell 20, and the box body 10 can adopt a variety of structures.

[0083] In some embodiments, the box body 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 cover each other, and the first portion 11 and the second portion 12 jointly define a storage space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one end open, and the first portion 11 may be a plate-like structure, the first portion 11 covers the open side of the second portion 12, so that the first portion 11 and the second portion 12 jointly define a storage space; the first portion 11 and the second portion 12 may also be hollow structures with one side open, and the open side of the first portion 11 covers the open side of the second portion 12. Of course, the box body 10 formed by the first portion 11 and the second portion 12 may be in various shapes, such as a cylinder, a cuboid, etc.

[0084] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures. For example, the battery device 100 may also include a converging component (such as Figure 5 The first busbar 40 and the second busbar 50 shown in FIG. 1 are used to realize electrical connection between multiple battery cells 20.

[0085] Each battery cell 20 may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0086] Please refer to Figure 3 , Figure 3 The following is a schematic diagram of the exploded structure of a battery cell 20 provided in some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes a battery device. Figure 3 The battery cell 20 includes an end cover 21, a shell 22, a battery cell assembly 23 and other functional components.

[0087] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as poles 24 can be provided on the end cap 21. The pole 24 can be used to be electrically connected to the battery cell assembly 23 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0088] The shell 22 is a component used to cooperate with the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the battery cell assembly 23, electrolyte and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cover 21 at the opening. Without limitation, the end cover 21 and the shell 22 can also be integrated. Specifically, the end cover 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when the interior of the shell 22 needs to be encapsulated, the end cover 21 covers the shell 22. The shell 22 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 22 can be determined according to the specific shape and size of the battery cell assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0089] The battery cell assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more battery cell assemblies 23 may be contained in the housing 22. The battery cell assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the battery cell assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0090] According to some embodiments of the present application, referring to Figure 2 , and please refer to Figures 4 to 8 , Figure 4 and Figure 5 Schematic diagram of the assembly of a temperature equalizing member and a battery cell in a battery device according to some embodiments of the present application. Figure 6 and Figure 7 is another schematic diagram of assembling a temperature balancing member and a battery cell in a battery device according to some embodiments of the present application, Figure 8 Schematic diagram of the structure of a temperature equalizing element in a battery device in some embodiments of the present application.

[0091] The present application provides a battery device 100 . The battery device 100 includes a housing 10 , a plurality of battery cells 20 , and at least one temperature equalizer 30 . The plurality of battery cells 20 are disposed in the housing 10 . Each battery cell 20 is provided with a pole 24 . The at least one temperature equalizer 30 is disposed in the housing 10 .

[0092] The poles 24 of at least two battery cells 20 are insulated and connected to the same temperature equalizing member 30 , and the temperature equalizing member 30 is used to transfer heat between the poles 24 connected thereto.

[0093] The “insulated connection” can be achieved by spraying an insulating coating on the outer surface of the temperature-equalizing member 30. Alternatively, an insulating heat-conducting member can be provided between the temperature-equalizing member 30 and the pole 24, which can both insulate the two components and effectively transfer the heat of the pole 24 to the temperature-equalizing member 30.

[0094] In the technical solution of the embodiment of the present application, the poles 24 of different battery cells 20 are insulated and connected to the same temperature equalizer 30, so that heat can be transferred between the poles 24 of different battery cells 20 through the temperature equalizer 30, so that the heat of the pole 24 with a higher temperature is transferred from the temperature equalizer 30 to the pole 24 with a lower temperature, and the temperature between the poles 24 of different battery cells 20 is balanced, so that the temperature of the poles 24 of different battery cells 20 is at a similar temperature level, thereby improving the service life of the battery device. At the same time, since the pole 24 and the temperature equalizer 30 are insulated, the occurrence of short circuit can be reduced.

[0095] According to some embodiments of the present application, optionally, please continue to refer to Figure 8 The temperature equalizing element 30 includes a housing 31 and a liquid wick 32. The housing 31 is provided with a temperature equalizing chamber 311, and the temperature equalizing chamber 311 is filled with a temperature equalizing medium. The liquid wick 32 is provided in the housing 31 and in the temperature equalizing chamber 311, and the liquid wick 32 is provided with a capillary structure.

[0096] The main function of the capillary structure is to transfer liquid through capillary action. Metal capillary structure or ceramic capillary structure can be selected. When the metal capillary structure is selected, it is usually made of metal wire sintered at high temperature and then laser cut, and then oxidized and corroded with chemical reagents to obtain better capillary ability and hydrophilicity; when the ceramic capillary structure is selected, it is generally made of quartz and clay particles calcined.

[0097] The temperature-equalizing medium is a phase change material, specifically, the phase change material can be alcohol or a refrigerant. When the temperature at a certain pole 24 is high, the temperature-equalizing medium there will be heated and undergo a liquid-gas phase change to form a gaseous medium. Under the action of the pressure difference, the gaseous medium diffuses to a location with a lower temperature and condenses to undergo a gas-liquid phase change to form a liquid medium. The condensed liquid medium will flow along the capillary structure of the liquid wick 32 to the place where the vaporization occurs, thereby achieving cooling of the pole 24 with a higher temperature, and at the same time achieving heat transfer between the poles 24 of different battery cells 20.

[0098] The phase change and flow of the temperature-equalizing medium in the temperature-equalizing chamber 311 transfer the high temperature to the low temperature, and then the heat of the higher temperature pole 24 is transferred from the temperature-equalizing element 30 to the lower temperature pole 24 , thereby balancing the temperatures of the poles 24 of different battery cells 20 .

[0099] According to some embodiments of the present application, optionally, please continue to refer to Figures 4 to 8 , the temperature equalizing element 30 is a heat pipe.

[0100] The interior of the heat pipe is generally provided with an evaporation section and a condensation section, wherein the evaporation section is the part where the medium is heated and vaporized, and the condensation section is the part where the vaporized medium condenses and releases heat. When the evaporation section is heated, the liquid medium absorbs heat and evaporates into a gaseous state, and the vaporized medium flows to the condensation section under the action of the pressure difference. In the condensation section, the vaporized medium releases latent heat and condenses into a liquid state, and the liquid medium flows back to the evaporation section through capillary action or gravity. Through the continuous circulation between the evaporation section and the condensation section, efficient heat transfer is achieved.

[0101] The temperature-equalizing member 30 is made of a heat pipe, so that the structure of the heat pipe itself can be utilized to achieve the effect of temperature uniformity among the poles 24 .

[0102] According to some embodiments of the present application, optionally, please continue to refer to Figure 6 and Figure 7 Each battery cell 20 is provided with two poles 24. For easy distinction, the two poles 24 of the same battery cell 20 can be marked as a first pole 24a and a second pole 24b, respectively. One of the first pole 24a and the second pole 24b is a positive pole, and the other is a negative pole.

[0103] A plurality of battery cells 20 are arranged in at least one row, and the first poles 24a of the battery cells 20 in the same row are arranged in one row, and the second poles 24b of the battery cells 20 in the same row are arranged in one row. At this time, if the first poles 24a of the battery cells 20 in the same row are all positive poles, and the second poles 24b of the battery cells 20 in the same row are all negative poles, then the positive poles of the battery cells 20 in the same row are arranged in one row, and the negative poles of the battery cells 20 in the same row are arranged in one row; if the first poles 24a of the battery cells 20 in the same row are all negative poles, and the second poles 24b of the battery cells 20 in the same row are all positive poles, then the positive poles of the battery cells 20 in the same row are arranged in one row, and the negative poles of the battery cells 20 in the same row are arranged in one row. If, among two adjacent battery cells 20 of each battery cell 20 in the same column, the first pole 24a of one battery cell 20 is a positive pole and the second pole 24b is a negative pole, and the first pole 24a of the other battery cell 20 is a negative pole and the second pole 24b is a positive pole, then the first poles 24a of the battery cells 20 in the same column are arranged in a row with the positive poles and the negative poles alternately spaced from each other, and the second poles 24b of the battery cells 20 in the same column are arranged in a row with the negative poles and the positive poles alternately spaced from each other.

[0104] The temperature-uniform component 30 includes a first temperature-uniform component 30 a and a second temperature-uniform component 30 b .

[0105] At least two first poles 24a in the same column are insulated and connected to the same first temperature-averaging member 30a, and at least two second poles 24b in the same column are insulated and connected to the same second temperature-averaging member 30b.

[0106] By arranging the first poles 24a of the battery cells 20 in the same column into a row, and making at least two of the first poles 24a in the same column insulated and connected to the same first temperature-averaging member 30a, heat can be transferred between the first poles 24a of different battery cells 20 through the first temperature-averaging member 30a, and the temperatures between the first poles 24a of different battery cells 20 are balanced. Similarly, by arranging the second poles 24b of the battery cells 20 in the same column into a row, and making at least two of the second poles 24b in the same column insulated and connected to the same second temperature-averaging member 30b, heat can be transferred between the second poles 24b of different battery cells 20 through the second temperature-averaging member 30b, and the temperatures between the second poles 24b of different battery cells 20 are balanced.

[0107] According to some embodiments of the present application, optionally, please continue to refer to Figure 6 and Figure 7 , the battery device also includes a first busbar and a second busbar.

[0108] The first pole 24a includes a first end surface 241a and a first side surface 242a. The first current collector is connected to the first end surface 241a. The first temperature equalizing member 30a is insulated and connected to the first side surface 242a. The first side surface 242a intersects with the first end surface 241a.

[0109] The second pole 24b includes a second end surface 241b and a second side surface 242b. The second current collector is connected to the second end surface 241b. The second temperature equalizing member 30b is insulated and connected to the second side surface 242b. The second side surface 242b intersects with the second end surface 241b.

[0110] By connecting the first current collector to the first end face 241a of the first pole 24a, and connecting the first temperature-averaging member 30a to the first side face 242a of the first pole 24a, the first temperature-averaging member 30a can be arranged on the side of the first current collector close to the first pole 24a. At the same time, since the first temperature-averaging member 30a and the first pole 24a are insulated, the occurrence of short circuit can be reduced. Similarly, by connecting the second current collector to the second end face 241b of the second pole 24b, and connecting the second temperature-averaging member 30b to the second side face 242b of the second pole 24b, the second temperature-averaging member 30b can be arranged on the side of the second current collector close to the second pole 24b. At the same time, since the second temperature-averaging member 30b and the second pole 24b are insulated, the occurrence of short circuit can be reduced.

[0111] According to some embodiments of the present application, optionally, the first temperature uniform component 30a is insulated and connected to the first current collector, and the second temperature uniform component 30b is insulated and connected to the second current collector.

[0112] By making the first temperature-averaging member 30a and the first current collector insulated and connected, the occurrence of short circuit phenomenon is reduced when the first temperature-averaging member 30a and the first current collector are connected. By making the second temperature-averaging member 30b and the second current collector insulated and connected, the occurrence of short circuit phenomenon is reduced when the second temperature-averaging member 30b and the second current collector are connected.

[0113] According to some embodiments of the present application, optionally, please continue to refer to Figure 4 and Figure 5 Each battery cell 20 is provided with two poles 24. For easy distinction, the two poles 24 of the same battery cell 20 can be marked as a first pole 24a and a second pole 24b, respectively. One of the first pole 24a and the second pole 24b is a positive pole, and the other is a negative pole.

[0114] The plurality of battery cells 20 are arranged in at least one row, the first poles 24 a of the battery cells 20 in the same row are arranged in one row, and the second poles 24 b of the battery cells 20 in the same row are arranged in one row.

[0115] The battery device 100 further includes a first busbar 40 and a second busbar 50 . The first busbar 40 is connected to the first pole 24 a , and the second busbar 50 is connected to the second pole 24 b .

[0116] The temperature-uniform component 30 includes a first temperature-uniform component 30 a and a second temperature-uniform component 30 b .

[0117] The same first temperature-averaging component 30 a is insulated and connected to at least two first current collectors 40 , and the same second temperature-averaging component 30 b is insulated and connected to at least two second current collectors 50 .

[0118] By arranging the first poles 24a of the battery cells 20 in the same column into a row, the first busbar 40 is connected to the first poles 24a, and the same first temperature-averaging member 30a is insulated and connected to at least two first busbars 40, so that heat can be transferred between different first busbars 40 through the first temperature-averaging member 30a, and then heat can be transferred between different first poles 24a, and the temperature between the first poles 24a of different battery cells 20 can be balanced. Similarly, by arranging the second poles 24b of the battery cells 20 in the same column into a row, the second busbar 50 is connected to the second poles 24b, and the same second temperature-averaging member 30b is insulated and connected to at least two second busbars 50, so that heat can be transferred between different second busbars 50 through the second temperature-averaging member 30b, and then heat can be transferred between different second poles 24b, and the temperature between the second poles 24b of different battery cells 20 can be balanced.

[0119] According to some embodiments of the present application, optionally, please continue to refer to Figure 4 and Figure 5 The first temperature-averaging member 30a is located on a side of the first current collector 40 facing away from the first pole 24a, and the second temperature-averaging member 30b is located on a side of the second current collector 50 facing away from the second pole 24b.

[0120] The first temperature equalizing member 30a and the second temperature equalizing member 30b are positioned on the battery device 100 by disposing the first temperature equalizing member 30a on the side of the first current collector 40 facing away from the first pole 24a and disposing the second temperature equalizing member 30b on the side of the second current collector 50 facing away from the second pole 24b.

[0121] According to some embodiments of the present application, optionally, a plurality of temperature-averaging elements 30 are provided, and the plurality of temperature-averaging elements 30 are connected in series or in parallel with each other.

[0122] When multiple temperature equalizing components 30 are provided, the multiple temperature equalizing components 30 can be connected in series or in parallel to each other to integrate the multiple temperature equalizing components 30 into one temperature equalizing component, which can reduce the number of parts of the battery device and achieve temperature equalization between more poles 24 through one temperature equalizing component.

[0123] According to some embodiments of the present application, optionally, please continue to refer to Figure 2 The temperature equalizing element 30 is thermally connected to the box body 10 .

[0124] “The temperature-averaging element 30 is thermally connected to the housing 10 ” means that while the temperature-averaging element 30 is connected to the housing 10 , heat can be transferred between the two.

[0125] By thermally connecting the temperature-averaging element 30 to the housing 10 , the heat of the temperature-averaging element 30 can be transferred to the housing 10 , and then the heat is dissipated into the outside air through the housing 10 .

[0126] According to some embodiments of the present application, optionally, please continue to refer to Fig. 9 The battery device 100 further includes a heat management component 60 , which is disposed in the housing 10 , and the temperature equalizer 30 is thermally connected to the heat management component 60 .

[0127] The thermal management component 60 may be a water cooling plate.

[0128] “The temperature-averaging element 30 is thermally connected to the thermal management component 60 ” means that while the temperature-averaging element 30 is connected to the thermal management component 60 , heat can be transferred between the two.

[0129] By arranging the thermal management component 60 in the housing 10 and thermally connecting the temperature equalizer 30 to the thermal management component 60 , the heat of the temperature equalizer 30 can be transferred to the thermal management component 60 , and then the heat is dissipated through the thermal management component 60 .

[0130] According to some embodiments of the present application, the present application also provides an electrical device, comprising a battery according to any of the above schemes, and the battery is used to provide electrical energy to the electrical device.

[0131] The power-consuming device may be any of the aforementioned devices or systems using batteries.

[0132] According to some embodiments of the present application, see Figure 2 , Figure 4 and Figure 5 The present application provides a battery device 100, wherein a housing 10 includes a plurality of battery cells 20, wherein the plurality of battery cells 20 are arranged in multiple rows and columns, and the first poles 24a of the battery cells 20 in the same column are arranged in a column, and the second poles 24b of the battery cells 20 in the same column are arranged in a column. Each first pole 24a is respectively connected to a first bus 40, and the first bus 40 connected to each first pole 24a is arranged in a column, and each second pole 24b is respectively connected to a second bus 50, and the second bus 50 connected to each second pole 24b is arranged in a column.

[0133] The first current collector 40 in the same column is insulated and connected to the same first temperature-averaging component 30 a , and the second current collector 50 in the same column is insulated and connected to the same second temperature-averaging component 30 b .

[0134] Each of the first temperature-averaging components 30 a and each of the second temperature-averaging components 30 b are thermally connected to the first portion 11 of the box body 10 .

[0135] When the heat of the first pole 24a of one of the battery cells 20 is high, the heat can be transferred to other first poles 24a with lower temperatures in the same row through the first temperature equalizing member 30a insulated and connected thereto, so as to balance the temperature between the first poles 24a in the same row. At the same time, the heat of each first temperature equalizing member 30a can also be dissipated to the outside of the box body 10 through the box body 10.

[0136] When the heat of the second pole 24b of one of the battery cells 20 is high, the heat can be transferred to other second poles 24b with lower temperatures in the same row through the second temperature equalizing member 30b insulated and connected thereto, so as to balance the temperatures among the second poles 24b in the same row. At the same time, the heat of each second temperature equalizing member 30b can also be dissipated to the outside of the box body 10 through the box body 10.

[0137] 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, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions 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: include: Box; A plurality of battery cells are arranged in the box, and each of the battery cells is provided with a pole; as well as At least one temperature-averaging component is disposed in the box; Wherein, at least two poles of the battery cells are insulated and connected to the same temperature-averaging component, and the temperature-averaging component is used to transfer heat between the poles connected thereto; The temperature-averaging component comprises a shell and a capillary structure, the shell is provided with a temperature-averaging cavity, and the temperature-averaging cavity is filled with a temperature-averaging medium; The capillary structure is arranged in the temperature-averaging cavity; The temperature-uniform medium is a phase-change material.

2. The battery device according to claim 1, characterized in that: The temperature equalizing element is a heat pipe.

3. The battery device according to claim 1, characterized in that: Each of the battery cells is provided with a first pole and a second pole; The plurality of battery cells are arranged in at least one row, the first poles of the battery cells in the same row are arranged in one row, and the second poles of the battery cells in the same row are arranged in one row; The temperature-averaging element comprises a first temperature-averaging element and a second temperature-averaging element; At least two of the first poles in the same column are insulated and connected to the same first temperature equalizing member, and at least two of the second poles in the same column are insulated and connected to the same second temperature equalizing member.

4. The battery device according to claim 3, characterized in that: The battery device further includes a first busbar and a second busbar; The first pole comprises a first end face and a first side face, the first current collector is connected to the first end face, the first temperature equalizing member is insulatedly connected to the first side face, and the first side face intersects with the first end face; The second pole includes a second end surface and a second side surface, the second current collector is connected to the second end surface, the second temperature equalizing member is insulatedly connected to the second side surface, and the second side surface intersects with the second end surface.

5. The battery device according to claim 4, characterized in that: The first temperature-averaging component is insulated and connected to the first current collector, and the second temperature-averaging component is insulated and connected to the second current collector.

6. The battery device according to claim 1, characterized in that: Each of the battery cells is provided with a first pole and a second pole; The plurality of battery cells are arranged in at least one row, the first poles of the battery cells in the same row are arranged in one row, and the second poles of the battery cells in the same row are arranged in one row; The battery device further includes a first busbar and a second busbar, wherein the first busbar is connected to the first pole, and the second busbar is connected to the second pole; The temperature-averaging element comprises a first temperature-averaging element and a second temperature-averaging element; The same first temperature-averaging component is insulated and connected to at least two of the first current collectors, and the same second temperature-averaging component is insulated and connected to at least two of the second current collectors.

7. The battery device according to claim 6, characterized in that: The first temperature-averaging component is located on a side of the first current collector facing away from the first pole, and the second temperature-averaging component is located on a side of the second current collector facing away from the second pole.

8. The battery device according to any one of claims 1 to 7, characterized in that: A plurality of the temperature-averaging components are provided, and the plurality of the temperature-averaging components are connected in series or in parallel.

9. The battery device according to any one of claims 1 to 7, characterized in that: The temperature equalizing element is thermally connected to the box body.

10. The battery device according to any one of claims 1 to 7, characterized in that: The battery device further comprises a heat management component, which is disposed in the box body, and the temperature equalizing element is thermally connected to the heat management component.

11. An electrical device, characterized in that: A battery device comprising the battery device according to any one of claims 1 to 10.

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