Battery and electric device

Abstract

The present application discloses a battery and an electric device. The battery comprises battery cells and a heat exchange assembly, a plurality of battery cells are provided and the plurality of battery cells are arranged in a first direction, and the first direction is the length direction or the width direction of the battery. The heat exchange assembly comprises a heat exchange tube, and the heat exchange tube comprises a first heat exchange section, a second heat exchange section, a connecting section, a liquid inlet, and a liquid outlet. The liquid inlet is communicated with the connecting section by means of the first heat exchange section, the liquid outlet is communicated with the connecting section by means of the second heat exchange section, and the first heat exchange section and the second heat exchange section are arranged in parallel or in an intersecting manner. Each battery cell is separately thermally conductively connected to the first heat exchange section and the second heat exchange section. During use, each battery cell separately exchanges heat with the first heat exchange section and the second heat exchange section, the first heat exchange section is configured to be intersecting or in parallel, and the temperature difference between the first heat exchange section and the second heat exchange section on thermally conductive connection positions of each battery cell is minimized, mitigating the problem of non-uniform temperature distribution among the plurality of battery cells.

Description

Batteries and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of the following patent applications, the entire contents of which are incorporated herein by reference:

[0003] A Chinese patent application entitled “Batteries and Electrical Equipment”, application number 202410122318.0, submitted to the State Intellectual Property Office of China on January 29, 2024. Technical Field

[0004] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0005] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0006] With the development of new energy, more and more fields are adopting new energy as a power source. Due to its advantages such as high energy density, rechargeable, safe and environmentally friendly, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields.

[0007] Batteries typically include multiple battery cells and a heat exchanger. The heat exchanger is thermally connected to the battery cells to maintain a suitable operating temperature. In the prior art, when the heat exchanger exchanges heat between the battery cells, uneven heating and cooling occurs within the battery cells. Summary of the Invention

[0008] In view of the above problems, the present application provides a battery and an electrical device to solve the problem of uneven heating and cooling in multiple battery cells.

[0009] A first aspect of the present application provides a battery, comprising:

[0010] Battery cells, the number of battery cells is multiple, and the multiple battery cells are arranged in a first direction, and the first direction is the length direction or width direction of the battery;

[0011] The heat exchange component includes a heat exchange tube, which includes a first heat exchange section, a second heat exchange section, a connecting section, a liquid inlet and a liquid outlet. The liquid inlet is connected to the connecting section through the first heat exchange section, and the liquid outlet is connected to the connecting section through the second heat exchange section. The first heat exchange section and the second heat exchange section are arranged in parallel or intersecting. Each battery cell is thermally connected to the first heat exchange section and the second heat exchange section respectively.

[0012] During battery use, the heat exchange medium enters the first heat exchange section through the liquid inlet, enters the second heat exchange section through the connecting section, and then flows out through the liquid outlet. Each battery cell exchanges heat with the first and second heat exchange sections respectively. The first heat exchange sections are arranged to intersect or be parallel to each other, ensuring a similar temperature difference between the first and second heat exchange sections at the thermal connection point of each battery cell. This ensures uniform heat conduction across multiple battery cells, effectively alleviating the problem of uneven heating and cooling across multiple battery cells.

[0013] In some embodiments of the present application, the first heat exchange section and the second heat exchange section are both located on the same side of the battery cell. Placing the first heat exchange section and the second heat exchange section on the same side of the battery cell facilitates the layout and installation of the heat exchange assembly and effectively reduces the space occupied by the heat exchange assembly within the battery, thereby improving the battery's space utilization and increasing the battery's energy density.

[0014] In some embodiments of the present application, the first heat exchange section and the second heat exchange section are respectively thermally connected to the same surface of the battery cell. Thermally connecting the same surface of the battery cell to the first heat exchange section and the second heat exchange section reduces the uneven heating and cooling of the battery cell during heat exchange due to the increased distance between the first heat exchange section and the second heat exchange section, further improving the heat exchange effect on the battery cell.

[0015] In some embodiments of the present application, a battery cell includes multiple surfaces, including a first surface having the largest area. At least a portion of the main body of the first heat exchange section and at least a portion of the main body of the second heat exchange section are respectively intersected with an extended surface of the first surface. By respectively intersecting the first heat exchange section and the second heat exchange section with the first surface, the sizes of the first and second heat exchange sections can be increased in the direction of extension of the first surface, thereby increasing the contact area between the heat exchange tube and the battery cell, thereby improving the heat exchange effect on the battery cell.

[0016] In some embodiments of the present application, the plurality of surfaces further includes a second surface, the number of first surfaces being two, the two first surfaces being spaced apart, the second surface being connected to the two first surfaces, and the second surface being thermally conductively connected to the first heat exchange section and the second heat exchange section, respectively. By providing the second surface and utilizing the second surface to be thermally conductively connected to the first heat exchange section and the second heat exchange section, respectively, the contact area between the battery cell and the heat exchange tube can be increased, thereby effectively improving the heat exchange effect of the battery cell.

[0017] In some embodiments of the present application, the liquid inlet and the liquid outlet are located on the same side of the heat exchange tube, and the heat exchange assembly further includes a manifold connected to the liquid inlet and the liquid outlet, respectively. Placing the liquid inlet and the liquid outlet on the same side facilitates connection to the manifold and improves assembly efficiency.

[0018] In some embodiments of the present application, the first heat exchange section is a first bending structure, the first bending structure is a first serpentine structure, the first bending structure includes multiple first heat exchange parts arranged in parallel and spaced apart, and the same battery cell is thermally connected to at least two first heat exchange parts.

[0019] By setting the first heat exchange section, a battery cell can be thermally connected to multiple positions of the first heat exchange section, increasing the contact area between the first heat exchange section and the battery cell, so that the heat exchange effect of the battery cell can be effectively improved.

[0020] In some embodiments of the present application, the second heat exchange section is a second bending structure, the second bending structure is a second serpentine structure, the second bending structure includes a plurality of second heat exchange portions arranged in parallel and spaced apart, and a single battery cell is thermally connected to at least two second heat exchange portions;

[0021] On the same battery cell, the number of first heat exchange sections connected to the battery cell is equal to the number of second heat exchange sections connected to the battery cell. By configuring the second heat exchange section, a single battery cell can be thermally connected to multiple locations on the second heat exchange section, increasing the contact area between the second heat exchange section and the battery cell, further improving the heat exchange effect of the battery cell.

[0022] In some embodiments of the present application, the first bending structure and the second bending structure are arranged in parallel and spaced apart. The first heat exchange section of the first bending structure and the second heat exchange section of the second bending structure are arranged in parallel and spaced apart so that the distance between the first heat exchange section and the second heat exchange section is the same. This allows for a constant temperature difference between the first heat exchange section and the second heat exchange section. When exchanging heat with multiple battery cells, this improves the temperature uniformity during the heat exchange process, further reducing the problem of uneven heating and cooling across multiple battery cells.

[0023] In some embodiments of the present application, the first heat exchange portion and the second heat exchange portion are both perpendicular to the battery cell. Arranging the first heat exchange portion and the second heat exchange portion perpendicular to the battery cell improves the convenience of heat exchange tube layout and also ensures that the contact lengths of the same battery cell with the first heat exchange portion and the second heat exchange portion are consistent, thereby improving the heat exchange effect of the battery cell.

[0024] In some embodiments of the present application, the heat exchange assembly further includes a temperature averaging plate, wherein the heat exchange tubes are thermally connected to one side of the temperature averaging plate, and at least a portion of the battery cells are thermally connected to the other side of the temperature averaging plate. Providing the temperature averaging plate and arranging the temperature averaging plate in thermal connection with the battery cells can, on the one hand, increase the heat exchange area between the heat exchange tubes and the battery cells, thereby improving the heat exchange effect. Furthermore, providing the temperature averaging plate can utilize the temperature averaging plate to equalize the temperature difference between the heat exchange tubes, thereby achieving more uniform heat exchange between the battery cells and further reducing the problem of uneven heating and cooling among multiple battery cells.

[0025] In some embodiments of the present application, the heat absorbing plate is an aluminum plate, a copper plate, or a stainless steel plate. By configuring the heat absorbing plate, the heat conduction efficiency of the heat absorbing plate can be improved, thereby increasing the heat exchange rate of the battery cells.

[0026] In some embodiments of the present application, multiple battery cells are located on the same side of a heat exchange tube and are thermally connected to a vapor chamber. Placing multiple battery cells on the same side of the heat exchange tube facilitates the layout and installation of the heat exchange assembly and effectively reduces the space occupied by the heat exchange assembly within the battery, thereby improving battery space utilization and boosting the battery's energy density.

[0027] In some embodiments of the present application, a heat conducting medium is provided between the battery cells and the temperature evaporating plate. The heat conducting medium is provided to thermally connect the temperature evaporating plate to the battery cells, thereby achieving sufficient thermal connection between the battery cells and the temperature evaporating plate, thereby further improving the heat exchange effect of the battery cells.

[0028] In some embodiments of the present application, a plurality of battery cells constitute a first battery assembly and a second battery assembly, and the first and second battery assemblies are located on opposite sides of a heat exchange tube. The first battery assembly includes a first number of battery cells, and the second battery assembly includes a second number of battery cells, the first number being greater than the second number, and the first and second numbers of battery cells are both arranged along a first direction. Multiple batteries are arranged into the first and second battery assemblies to meet different application scenarios, and the opposite sides of the heat exchange tube are thermally connected to the first and second battery assemblies, respectively, thereby enabling a single heat exchange tube to exchange heat for two battery packs, reducing the number of heat exchange components, effectively lowering costs, and reducing the space occupied by the batteries, thereby improving the battery space utilization rate.

[0029] In some embodiments of the present application, the first battery assembly includes a first portion and a second portion, the first portion and the second battery assembly are arranged opposite each other, the second portion and the second battery assembly are arranged staggered, a temperature equalizing plate is provided between the first portion and the heat exchange tube, a temperature equalizing plate is provided between the second battery assembly and the heat exchange tube, and a heat conductive medium is provided between at least a portion of the second portion and the heat exchange tube. The opposite sides of the heat exchange tube respectively exchange heat with the first portion and the second battery assembly, and one side of the heat exchange tube exchanges heat with the second portion. By providing a temperature equalizing plate between the first portion and the heat exchange tube and providing a temperature equalizing plate between the second battery assembly and the heat exchange tube, the heat exchange efficiency of the heat exchange tube in the first portion and the second battery assembly can be improved, so that the heat exchange rates of the first portion and the second portion tend to be consistent, further reducing the uneven heating and cooling of multiple battery cells during heat exchange.

[0030] In some embodiments of the present application, a heat conducting medium is provided between the temperature averaging plate thermally connected to the first portion and the first portion, and a heat conducting medium is provided between the temperature averaging plate thermally connected to the second battery assembly and the second battery assembly;

[0031] In the direction from the first battery assembly to the second battery assembly, the size of the heat conductive medium thermally connected to the second portion is a first size, the size of the heat conductive medium thermally connected to the first portion is a second size, and the size of the heat conductive medium thermally connected to the second battery assembly is a third size. The first size is greater than or equal to the second size, and the second size is equal to the third size. By adjusting the size of the heat conductive medium along the direction from the first battery assembly to the second battery assembly, the heat conductive medium is thicker in the second portion and thinner in the first portion. The heat conductive medium can slow the heat exchange rate between the heat exchange tube and the second portion, ensuring that the heat exchange rate between the heat exchange tube and the second portion and the heat exchange efficiency range between the heat exchange tube and the first portion are consistent, thereby reducing the speed difference during heat exchange between the heat exchange tube and the first and second battery assemblies, thereby improving the uniformity of battery heat exchange.

[0032] In some embodiments of the present application, the ratio of the second size to the first size is in the range of 1 / 3 to 1. By setting the ratio of the two sizes, the heat exchange rate can be adjusted by reasonably controlling the size of the heat transfer medium, thereby improving the heat exchange uniformity of the battery.

[0033] In some embodiments of the present application, the cross-section of the heat exchange tube includes a rectangular, circular, elliptical, triangular, rhombus, pentagonal, or hexagonal shape. The cross-section of the heat exchange tube can be changed to meet the different heat dissipation requirements of the battery cell.

[0034] In some embodiments of the present application, the heat exchange tube is a flat tube with a rectangular cross-section. Along the second direction, the rectangular dimensions are greater than or equal to 2 mm, and along the third direction, the rectangular dimensions range from 10 mm to 150 mm. The second direction is the direction from the battery cell to the heat exchange tube, and the third direction is perpendicular to the second direction and parallel to the cross-section. Configuring the heat exchange tube as a flat tube facilitates bending operations. Furthermore, the cross-section of the flat tube is configured to ensure sufficient heat transfer area between the heat exchange tube and the battery cell, thereby effectively improving heat exchange.

[0035] In some embodiments of the present application, the corners of the heat exchange tube's flow channel are rounded along the circumferential direction of the heat exchange tube. By setting the corners of the flow channel as rounded, the resistance to the flow of the heat exchange medium is reduced, the flow rate of the heat exchange medium is increased, and the heat exchange efficiency is effectively improved.

[0036] In some embodiments of the present application, the heat exchange tube is an integrally formed structure, which improves the convenience of heat exchange tube processing and reduces the leakage of heat exchange medium compared to a spliced ​​structure.

[0037] A second aspect of the present application provides an electrical device, which includes the battery as described above.

[0038] 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

[0039] FIG1 schematically shows a structural diagram of a vehicle according to an embodiment of the present application;

[0040] FIG2 schematically shows a schematic structural diagram of a battery according to an embodiment of the present application;

[0041] FIG3 is a schematic structural diagram of the battery shown in FIG2 in another state (in the figure, multiple battery cells are not shown);

[0042] FIG4 is a schematic structural diagram of the heat exchange assembly shown in FIG3 ;

[0043] FIG5 is a schematic diagram of the exploded structure of the heat exchange assembly shown in FIG4 ;

[0044] FIG6 is a schematic diagram of a partial structure of the battery shown in FIG1 ;

[0045] FIG7 schematically shows a schematic structural diagram of a battery according to an embodiment of the present application;

[0046] FIG8 is a schematic structural diagram of the battery shown in FIG7 from another perspective;

[0047] FIG9 is a schematic structural diagram of the heat exchange assembly shown in FIG7 ;

[0048] FIG10 is a schematic diagram of the exploded structure of the heat exchange assembly shown in FIG9 ;

[0049] FIG11 is a schematic structural diagram of the heat exchange assembly shown in FIG9 from another perspective;

[0050] FIG12 is a schematic diagram of a partial structure of the battery shown in FIG7 ;

[0051] FIG13 is an enlarged structural diagram of part A of the battery shown in FIG12

[0052] FIG14 is a schematic structural diagram of the heat exchange tube shown in FIG10 ;

[0053] FIG15 is a schematic diagram of the enlarged structure of portion B of the heat exchange tube shown in FIG14 .

[0054] The figures are numbered as follows: 1000, vehicle; 100, battery; 10, battery cell; 20, battery case; 30, heat exchange assembly; 31, heat exchange tube; 311, first heat exchange section; 3111, first heat exchange part; 3112, first connecting part; 312, second heat exchange section; 3121, second heat exchange part; 3122, second connecting part; 313, connecting section; 32, temperature equalizing plate; 33, current collecting part; 34, heat conducting medium; 35, glue coating area; 40, first battery assembly; 41, second part; 42, first part; 50, second battery assembly; 200, controller; 300, motor; a, first direction; b, third direction; c, second direction. DETAILED DESCRIPTION

[0055] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art 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" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0057] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0058] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0060] 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).

[0061] 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., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0062] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0063] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0064] In the prior art, a battery typically includes multiple battery cells and a heat exchanger. The heat exchanger is thermally connected to the multiple battery cells to ensure that the multiple battery cells can operate at a suitable temperature. In the prior art, when the heat exchanger exchanges heat between the multiple battery cells, uneven heating and cooling occurs within the multiple battery cells.

[0065] In the present application, a battery includes a battery cell and a heat exchange assembly. The number of battery cells is multiple, and the multiple battery cells are arranged in a first direction, which is the length or width direction of the battery. The heat exchange assembly includes a heat exchange tube, which includes a first heat exchange section, a second heat exchange section, a connecting section, a liquid inlet, and a liquid outlet. The liquid inlet is connected to the connecting section through the first heat exchange section, and the liquid outlet is connected to the connecting section through the second heat exchange section. The first heat exchange section and the second heat exchange section are arranged in parallel or intersecting directions, and each battery cell is thermally connected to the first heat exchange section and the second heat exchange section respectively. During use of the battery, each battery cell exchanges heat with the first heat exchange section and the second heat exchange section respectively. The first heat exchange section is arranged to intersect or be parallel so that the temperature difference between the first heat exchange section and the second heat exchange section at the thermal connection position of each battery cell is close, thereby achieving uniform heat conduction to the multiple battery cells, thereby effectively improving the problem of uneven heating and cooling in the multiple battery cells.

[0066] The battery involved in the embodiments of the present application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery cells and batteries involved in the present application can be used to form the electrical device.

[0067] In the embodiments of the present application, the electrical devices using batteries as power sources may include, but are not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0068] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the batteries and electrical equipment described above, but can also be applied to all batteries including boxes and electrical equipment using batteries. However, for the sake of simplicity, the following embodiments are explained using electric vehicles as an example.

[0069] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0070] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0071] FIG2 is a schematic structural diagram of a battery 100 according to an embodiment of the present application. In FIG2 , the battery 100 may include a battery case 20 and a plurality of battery cells 10 , wherein the plurality of battery cells 10 are accommodated in the battery case 20 .

[0072] In this application, a battery cell 10 refers to the smallest unit that makes up a battery assembly. Multiple battery cells 10 can be connected in series and / or in parallel via electrode terminals for use in various applications. Battery cells 10 may include, but are not limited to, lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries. Furthermore, the shape of a battery cell 10 may include, but is not limited to, a cylinder, a flat body, a rectangular parallelepiped, or other shapes.

[0073] The battery case 20 is used to house the battery cells 10 to prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells. The battery case 20 can be a simple three-dimensional structure such as a single rectangular parallelepiped, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as rectangular parallelepipeds, cylinders, or spheres. The battery case 20 can be made of alloy materials such as aluminum alloy and iron alloy, polymer materials such as polycarbonate and polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin.

[0074] In some embodiments, the battery case 20 may include a first case portion and a second case portion, the first case portion and the second case portion overlapping each other, and the first case portion and the second case portion jointly define a space for accommodating the battery cells 10. The second case portion may be a hollow structure with one end open, and the first case portion may be a plate-like structure, with the first case portion overlapping the open side of the second case portion, so that the first case portion and the second case portion jointly define a space for accommodating the battery cells 10. The first case portion and the second case portion may also be hollow structures each with one end open, with the open side of the first case portion overlapping the open side of the second case portion.

[0075] In some embodiments of the present application, as shown in Figures 2 to 15, a battery 100 is proposed, which includes a battery cell 10 and a heat exchange assembly 30. The number of battery cells 10 is multiple, and the multiple battery cells 10 are arranged in a first direction, which is the length direction or width direction of the battery 100. The heat exchange assembly 30 includes a heat exchange tube 31, which includes a first heat exchange section 311, a second heat exchange section 312, a connecting section 313, a liquid inlet 314 and a liquid outlet 315. The liquid inlet 314 is connected to the connecting section 313 through the first heat exchange section 311, and the liquid outlet 314 is connected to the connecting section 313 through the second heat exchange section 312. The first heat exchange section 311 and the second heat exchange section 312 are arranged in parallel or intersecting with each other, and each battery cell 10 is thermally connected to the first heat exchange section 311 and the second heat exchange section 312 respectively.

[0076] In the present application, the external shape of the battery 100 is approximately a rectangular parallelepiped, and the battery 100 has a length, a width, and a height, wherein the length of the battery 100 refers to the length of the largest side in the horizontal plane when the battery 100 is placed horizontally, the width of the battery 100 refers to the length of the side that is smaller than the largest side when the battery 100 is placed horizontally, and the height of the battery 100 refers to the size of the battery 100 in the vertical direction when the battery 100 is placed horizontally.

[0077] Multiple battery cells 10 are arranged in a first direction in the battery case 20, that is, multiple battery cells 10 are arranged along the length direction or width direction of the battery case 20, so that the multiple battery cells 10 can fully utilize the space of the battery case 20, improve the space utilization rate of the battery case 20, and improve the energy density of the battery 100.

[0078] In the present application, a flow channel structure is formed inside the heat exchange tube 31, and the flow channel structure is for the heat exchange medium to flow. When the heat exchange medium flows through the flow channel structure, the heat exchange medium can exchange heat with other external components through the heat exchange tube 31 (heating or cooling other external components).

[0079] In the present application, the first heat exchange section 311 is the pipe section through which the heat exchange medium flows in, and the second heat exchange section 312 is the pipe section through which the heat exchange medium flows out. The connecting section 313 connects the first heat exchange section 311 with the second heat exchange section 312 so that the heat exchange medium in the first heat exchange section 311 enters the second heat exchange section 312 through the connecting section 313. The liquid inlet 314 is provided at the end of the first heat exchange section 311 away from the connecting section 313, and the liquid outlet 315 is provided at the end of the second heat exchange section 312 away from the connecting section 313.

[0080] In the prior art, when the heat exchange component 30 exchanges heat with multiple battery cells 10, the battery 100 is thermally connected to one of the liquid inlet and outlet channels of the heat exchange component 30. The temperature at the inlet of the heat exchange channel is high, and the temperature at the outlet is low. The heat exchange effects of the battery cell 10 exchanging heat with the outlet and the battery cell 10 exchanging heat with the inlet are different, resulting in uneven heating and cooling after the multiple battery cells 10 exchange heat with the heat exchange component 30.

[0081] In the present application, during use of the battery 100, the heat exchange medium enters the first heat exchange section 311 from the liquid inlet 314. The heat exchange medium in the first heat exchange section 311 enters the second heat exchange section 312 through the connecting section 313. The heat exchange medium in the second heat exchange section 312 flows out through the liquid outlet 315. Each battery cell 10 exchanges heat with the first heat exchange section 311 and the second heat exchange section 312 respectively. The first heat exchange sections 311 are arranged to intersect or be parallel so that the temperature difference between the first heat exchange section 311 and the second heat exchange section 312 at the thermal connection position of each battery cell 10 is close, thereby achieving uniform heat conduction to the multiple battery cells 10 and effectively improving the problem of uneven heating and cooling among the multiple battery cells 10.

[0082] It should be noted that the first heat exchange section 311 and the second heat exchange section 312 of the heat exchange tube 31 may be arranged on the same side of the battery cell 10 , or on different sides of the battery cell 10 .

[0083] In some embodiments of the present application, as shown in FIG. 6 , FIG. 8 and FIG. 12 , the first heat exchange section 311 and the second heat exchange section 312 are both disposed on the same side of the battery cell 10 .

[0084] Specifically, the first heat exchange section 311 and the second heat exchange section 312 are both arranged on the same side of the battery cell 10. When assembling the battery 100, it can be assembled layer by layer, which reduces interference between structures and can effectively improve assembly efficiency.

[0085] In addition, by arranging the first heat exchange section 311 and the second heat exchange section 312 on the same side of the battery cell 10, it is more convenient to layout the heat exchange tube 31 and the battery cell 10, which improves the rationality of the structural layout and is also conducive to the disassembly of the battery 100 during maintenance, thereby significantly improving the convenience of the maintenance process.

[0086] In addition, arranging the first heat exchange section 311 and the second heat exchange section 312 on the same side of the battery cell 10 can effectively reduce the space occupied by the heat exchange assembly 30 in the battery 100, thereby improving the space utilization of the battery 100 and improving the energy density of the battery 100.

[0087] It should be noted that the first heat exchange section 311 and the second heat exchange section 312 of the heat exchange tube 31 are arranged on the same side of the battery cell 10, wherein the first heat exchange section 311 and the second heat exchange section 312 can be thermally connected to the same surface of the battery cell 10, or can be thermally connected to different sides.

[0088] In some embodiments of the present application, as shown in FIG. 6 and FIG. 12 , the first heat exchange section 311 and the second heat exchange section 312 are respectively thermally connected to the same surface of the battery cell 10 .

[0089] Specifically, by arranging the first heat exchange section 311 and the second heat exchange section 312 to be thermally connected to the same surface of the battery cell 10 respectively, when multiple battery cells 10 are thermally connected to the heat exchange tube 31, the convenience of assembly can be improved, and the efficiency of assembly is effectively improved, thereby speeding up the production rhythm.

[0090] At the same time, by arranging the first heat exchange section 311 and the second heat exchange section 312 to be thermally connected to the same surface of the battery cell 10 respectively, the disassembly of the battery 100 during maintenance is facilitated, so that the convenience of the maintenance process is significantly improved.

[0091] In addition, the same surface of the battery cell 10 is thermally connected to the first heat exchange section 311 and the second heat exchange section 312 respectively, which reduces the uneven heating and cooling during the heat exchange process of the battery cell 10 caused by the increase in the distance between the first heat exchange section 311 and the second heat exchange section 312, and further improves the heat exchange effect of the battery cell 10.

[0092] In some embodiments of the present application, the battery cell 10 includes multiple surfaces, including a first surface with the largest area, and at least part of the body of the first heat exchange section 311 and at least part of the body of the second heat exchange section 312 are respectively arranged to intersect with the extended surface of the first surface.

[0093] Specifically, the largest area means that, among the multiple surfaces constituting the battery cell 10 , the area of ​​the first surface is larger than the area of ​​any other surface.

[0094] In the present application, by arranging the first heat exchange section 311 and the second heat exchange section 312 to intersect with the first surface respectively, the size of the first heat exchange section 311 and the second heat exchange section 312 can be increased in the extension direction of the first surface, thereby increasing the contact area between the heat exchange tube 31 and the battery cell 10, thereby improving the heat exchange effect on the battery cell 10.

[0095] It should be noted that, in the present application, the battery cell 10 may be a cylindrical battery 100 , a square-shell battery 100 , a blade battery 100 or an OS battery 100 (One-Stop Bettery).

[0096] In some embodiments of the present application, the multiple surfaces also include a second surface, the number of first surfaces is two, the two first surfaces are arranged at intervals, the second surfaces are respectively connected to the two first surfaces, and the second surfaces are respectively thermally connected to the first heat exchange section 311 and the second heat exchange section 312.

[0097] Specifically, by providing the second surface, the second surface is thermally connected to the first heat exchange section 311 and the second heat exchange section 312 respectively, thereby increasing the contact area between the battery cell 10 and the heat exchange tube 31, thereby effectively improving the heat exchange effect of the battery cell 10.

[0098] It should be understood that in the present application, the battery cell 10 is a square-shell battery 100, a blade battery 100, or an OS battery 100, etc. By thermally connecting the first heat exchange section 311 and the second heat exchange section 312 to the second surface respectively, the surface where the heat exchange tube 31 is thermally connected to the battery cell 10 avoids the large surface of the battery cell 10 (the surface with the largest area, i.e., the first surface), thereby reducing the occupation of the heat exchange tube 31 by a single battery cell 10. More battery cells 10 can be thermally connected to the same heat exchange tube 31, thereby reducing the number of heat exchange components 30 used, thereby reducing the overall volume of the battery 100, and effectively reducing the manufacturing cost of the battery 100.

[0099] In some embodiments of the present application, as shown in Figures 4, 5, 9, 10, 11 and 14, the outlet of the first heat exchange section 311 is connected to the inlet of the second heat exchange section 312 through the connecting section 313.

[0100] Specifically, the first heat exchange section 311 and the second heat exchange section 312 are arranged in parallel or intersecting, and the first heat exchange section 311 and the second heat exchange section 312 are connected by the connecting section 313, which improves the convenience of connecting the first heat exchange section 311 and the second heat exchange section 312.

[0101] It should be noted that in the present application, the shape of the connecting section 313 can be a straight line, a C-shape, or a semi-I-shape. In the structure shown in the drawings of the present application, the connecting section 313 is a C-shaped structure. Setting the connecting section 313 into a C-shaped structure can reduce the resistance of the heat exchange medium during its flow along the heat exchange tube 31, increase the flow rate of the heat exchange medium, and thus improve the heat exchange efficiency.

[0102] In addition, the connecting section 313 and the first heat exchange section 311 can be connected by bonding, welding or integral molding. At the same time, the connecting section 313 and the second heat exchange section 312 can also be connected by bonding, welding or integral molding.

[0103] In some embodiments of the present application, as shown in Figures 4, 5, 9, 10, 11 and 14, the liquid inlet 314 and the liquid outlet 315 of the heat exchange tube 31 are arranged on the same side of the heat exchange tube 31, and the heat exchange assembly 30 also includes a collecting member 33, which is respectively connected to the inlet of the first heat exchange section 311 and the outlet of the second heat exchange section 312.

[0104] Specifically, the liquid inlet 314 and the liquid outlet 315 of the heat exchange tube 31 are arranged on the same side of the heat exchange tube 31. When the collecting member 33 is installed, the liquid inlet 314 and the liquid outlet 315 of the heat exchange tube 31 can be connected to the collecting member 33 on the same side, thereby facilitating the connection with the collecting member 33 and improving the assembly efficiency.

[0105] It should be noted that the current collecting member 33 and the liquid inlet 314 can be connected and fixed by bonding, clamping or welding, and the current collecting member 33 and the liquid outlet 315 can be connected and fixed by bonding, clamping or welding.

[0106] In some embodiments of the present application, as shown in Figures 4, 5, 9, 10, 11 and 14, the first heat exchange section 311 is a first bending structure, the first bending structure is a first serpentine structure, the first bending structure includes a plurality of first heat exchange parts 3111 arranged in parallel and spaced apart, and the same battery cell 10 is thermally connected to at least two first heat exchange parts 3111.

[0107] Specifically, by setting the first heat exchange section 311, a battery cell 10 can be thermally connected to multiple positions of the first heat exchange section 311, thereby increasing the contact area between the first heat exchange section 311 and the battery cell 10, so that the heat exchange effect of the battery cell 10 can be effectively improved.

[0108] It should be pointed out that, in the present application, the first heat exchange portion 3111 may be a straight-line or curved structure.

[0109] In addition, all the first heat exchange parts 3111 are arranged in parallel and at intervals, and two adjacent first heat exchange parts 3111 are connected via a first connecting part 3112 .

[0110] In some embodiments of the present application, as shown in Figures 4, 5, 9, 10, 11 and 14, the second heat exchange section 312 is a second bending structure, the second bending structure is a second serpentine structure, the second bending structure includes a plurality of second heat exchange parts 3121 arranged in parallel and spaced apart, the same battery cell 10 is thermally connected to at least two second heat exchange parts 3121, and on the same battery cell 10, the number of thermally connected first heat exchange parts 3111 is equal to the number of thermally conductively connected second heat exchange parts 3121.

[0111] Specifically, by setting the second heat exchange section 312, a battery cell 10 can be thermally connected to multiple positions of the second heat exchange section 312, thereby increasing the contact area between the second heat exchange section 312 and the battery cell 10, so that the heat exchange effect of the battery cell 10 can be further improved.

[0112] It should be noted that, in the present application, the second heat exchange portion 3121 may be in a straight line or a curved structure. The shape of the first heat exchange portion 3111 and the shape of the second heat exchange portion 3121 may be the same or different.

[0113] In addition, all the second heat exchange parts 3121 are arranged in parallel and at intervals, and two adjacent second heat exchange parts 3121 are connected via the second connecting part 3122 .

[0114] In addition, in the present application, the first heat exchange part 3111 and the second heat exchange part 3121 are arranged in pairs, that is, one first heat exchange part 3111 is corresponding to one second heat exchange part 3121, so that the battery cell 10 can effectively exchange heat evenly and improve the temperature uniformity of the battery 100.

[0115] In some embodiments of the present application, as shown in FIG. 4 , FIG. 5 , FIG. 9 , FIG. 10 , FIG. 11 and FIG. 14 , the first bending structure and the second bending structure are arranged in parallel and spaced apart.

[0116] Specifically, the first heat exchange section 311 with a first bending structure and the second heat exchange section 312 with a second bending structure are arranged in parallel and spaced apart, so that the distance between the first heat exchange section 311 and the second heat exchange section 312 is the same, thereby making the temperature difference between the first heat exchange section 311 and the second heat exchange section 312 constant. When exchanging heat with multiple battery cells 10, the temperature uniformity performance during the heat exchange process can be improved, further reducing the problem of uneven heating and cooling of multiple battery cells 10.

[0117] In some embodiments of the present application, the first heat exchange portion 3111 and the second heat exchange portion 3121 are both perpendicular to the battery cell 10. Arranging the first heat exchange portion 3111 and the second heat exchange portion 3121 perpendicular to the battery cell 10 improves the convenience of the layout of the heat exchange tube 31 and also ensures that the contact lengths of the same battery cell 10 with the first heat exchange portion 3111 and the second heat exchange portion 3121 are consistent, further improving the heat exchange effect of the battery cell 10.

[0118] In some embodiments of the present application, as shown in Figures 4 to 6 and Figures 9 to 13, the heat exchange assembly 30 also includes a temperature averaging plate 32, the heat exchange tube 31 is thermally connected to one side of the temperature averaging plate 32, and at least a portion of the battery cells 10 are thermally connected to the other side of the temperature averaging plate 32.

[0119] In the present application, the temperature equalizing plate 32 is connected to the heat exchange tube 31, and the heat of the heat exchange tube 31 is transferred to the temperature equalizing plate 32. The heat can be transferred from the high temperature area to the low temperature area, so that the overall temperature equalization reaches a state of temperature balance, thereby achieving temperature adjustment and further reducing the uneven hot and cold conditions that occur during the heat exchange component 30 to exchange heat with multiple battery cells 10.

[0120] Specifically, a temperature equalizing plate 32 is provided and is provided in thermal connection with the battery cell 10. On the one hand, the heat exchange area between the heat exchange tube 31 and the battery cell 10 can be increased, so that the heat exchange effect can be improved. On the other hand, the temperature equalizing plate 32 is provided, and the temperature equalizing plate 32 can be used to equalize the temperature difference of the heat exchange tube 31, so that the heat exchange process of the battery cell 10 can be more uniform, further reducing the problem of uneven hot and cold of multiple battery cells 10.

[0121] It should be pointed out that in the present application, the temperature averaging plate 32 and the heat exchange tube 31 are fixedly connected. By fixing the temperature averaging plate 32 and the heat exchange tube 31, the stability of heat transfer between the heat exchange tube 31 and the temperature averaging plate 32 can be improved, thereby improving the stability of heat exchange for the battery cell 10.

[0122] In addition, the connection and fixing methods between the temperature equalizing plate 32 and the heat exchange tube 31 include but are not limited to bonding, welding or connection with connectors.

[0123] In some embodiments of the present application, the temperature homogenizing plate 32 is an aluminum plate, a copper plate, or a stainless steel plate.

[0124] Specifically, by providing the temperature averaging plate 32 , the heat conduction efficiency of the temperature averaging plate 32 can be improved, thereby increasing the heat exchange rate of the battery cells 10 .

[0125] In some embodiments of the present application, as shown in FIG6 , a plurality of battery cells 10 are disposed on the same side of the heat exchange tube 31 and are respectively thermally connected to the temperature averaging plate 32 .

[0126] Specifically, multiple battery cells 10 are arranged on the same side of the heat exchange tube 31, which facilitates the layout and installation of the heat exchange assembly 30 and effectively reduces the space occupied by the heat exchange assembly 30 in the battery 100, thereby improving the space utilization of the battery 100 and improving the energy density of the battery 100.

[0127] In some embodiments of the present application, as shown in FIG6 , a heat conducting medium 34 is provided between the battery cell 10 and the temperature homogenizing plate 32 .

[0128] In the present application, the heat conducting medium 34 is a heat conductor, that is, it can realize the heat transfer function, wherein the heat conducting medium 34 can be a heat conducting glue or the like.

[0129] Specifically, a heat conducting medium 34 is provided to thermally connect the temperature averaging plate 32 and the battery cell 10 by means of the heat conducting medium 34 , so that the battery cell 10 and the temperature averaging plate 32 can be fully thermally connected, thereby further improving the heat exchange effect of the battery cell 10 .

[0130] It should be understood that the battery cell 10 is connected to the temperature equalizing plate 32 through a heat-conducting medium 34. The heat-conducting medium 34 has a certain viscosity, so that the battery cell 10 can be fixed on the temperature equalizing plate 32, thereby improving the structural stability of the battery cell 10, and making the battery cell 10 and the temperature equalizing plate 32 have good contact performance, thereby effectively improving the heat dissipation effect of the battery cell 10.

[0131] In some embodiments of the present application, as shown in Figures 7 to 13, a plurality of battery cells 10 constitute a first battery assembly 40 and a second battery assembly 50, and the first battery assembly 40 and the second battery assembly 50 are located on opposite sides of the heat exchange tube 31. The first battery assembly 40 includes a first number of battery cells 10, and the second battery assembly 50 includes a second number of battery cells 10. The first number is greater than the second number, and the first number of battery cells 10 and the second number of battery cells 10 are both arranged along the first direction.

[0132] Specifically, multiple batteries 100 are arranged into a first assembly and a second battery assembly 50 to meet different application scenarios.

[0133] In addition, the opposite sides of the heat exchange tube 31 are thermally connected to the first battery assembly 40 and the second battery assembly 50 respectively, so that one heat exchange tube 31 can exchange heat for two battery groups 100, reducing the number of heat exchange components, effectively reducing costs, and at the same time reducing the space occupied by the battery 100, so that the space utilization of the battery 100 can be improved.

[0134] In some embodiments of the present application, as shown in Figures 7 to 13, the first battery assembly 40 includes a first part 42 and a second part 41, the first part 42 is arranged opposite to the second battery assembly 50, and the second part 41 is staggered with the second battery assembly 50. A temperature equalizing plate 32 is provided between the first part 42 and the heat exchange tube 31, a temperature equalizing plate 32 is provided between the second battery assembly 50 and the heat exchange tube 31, and a heat conducting medium 34 is provided between at least part of the second part 41 and the heat exchange tube 31 (as shown in Figure 11, Figure 11 has a glue-coated area 35, which is used to set the heat conducting medium to enable the second part 41 to be thermally connected to the heat exchange tube 31).

[0135] Specifically, opposite sides of the heat exchange tube 31 exchange heat with the first part 42 and the second battery assembly 50 respectively, and one side of the heat exchange tube 31 exchanges heat with the second part 41. By setting a temperature equalizing plate 32 between the first part 42 and the heat exchange tube 31 and a temperature equalizing plate 32 between the second battery assembly 50 and the heat exchange tube 31, the heat exchange efficiency of the heat exchange tube 31 in the first part 42 and the second battery assembly 50 can be improved, so that the heat exchange rates of the first part 42 and the second part 41 tend to be consistent, further reducing the uneven hot and cold conditions of multiple battery cells 10 during heat exchange.

[0136] In some embodiments of the present application, as shown in FIG13 , a heat conducting medium 34 is provided between the temperature averaging plate 32 thermally connected to the first portion 42 and the first portion 42, and a heat conducting medium 34 is provided between the temperature averaging plate 32 thermally connected to the second battery assembly 50 and the second battery assembly 50. Along the direction from the first battery assembly 40 to the second battery assembly 50 (i.e., the second direction), the size of the heat conducting medium 34 thermally connected to the second portion 41 is a first size, the size of the heat conducting medium 34 thermally connected to the first portion 42 is a second size, and the size of the heat conducting medium 34 thermally connected to the second battery assembly 50 is a third size, wherein the first size is greater than or equal to the second size, and the second size is equal to the third size.

[0137] As shown in FIG13 , the first size is m1 , the second size is m2 , and the third size is m3 , wherein m2 = m3 and m1 ≥ m2 .

[0138] Specifically, along the direction from the first battery assembly 40 to the second battery assembly 50, by setting the size of the heat-conducting medium 34, the heat-conducting medium 34 at the second part 41 is thick, and the heat-conducting medium 34 at the first part 42 is thin. The heat-conducting medium 34 can slow down the heat exchange speed between the heat exchange tube 31 and the second part 41, so that the heat exchange rate between the heat exchange tube 31 and the second part 41, and the heat exchange efficiency area between the heat exchange tube 31 and the first part 42 are consistent, so as to reduce the speed difference that occurs during the heat exchange process between the heat exchange tube 31 and the first battery assembly 40 and the second battery assembly 50, thereby improving the uniformity of heat exchange of the battery 100.

[0139] It should be understood that when the heat exchange rate of the first part 42 is lower than the heat exchange rate of the second part 41, the speed between the second part 41 and the heat exchange tube 31 can be reduced by increasing the thickness (first size) of the heat transfer medium 34 between the second part 41 and the heat exchange tube 31. Conversely, when the heat exchange rate of the first part 42 is higher than the heat exchange rate of the second part 41, the speed between the second part 41 and the heat exchange tube 31 can be increased by reducing the thickness (first size) of the heat transfer medium 34 between the second part 41 and the heat exchange tube 31.

[0140] In some embodiments of the present application, the ratio of the second size to the first size is in the range of 1 / 3 to 1.

[0141] Specifically, by setting the ratio of the two sizes, the heat exchange rate can be adjusted by reasonably controlling the size of the heat-conducting medium 34 , so that the heat exchange uniformity of the battery 100 is improved.

[0142] It should be noted that, in the present application, the ratio of the second size to the first size may be 1 / 3, 2 / 3, 3 / 4, 4 / 5, 5 / 6, 6 / 7, or 1.

[0143] In some embodiments of the present application, the flow cross-section of the heat exchange tube 31 includes a rectangle, a circle, an ellipse, a triangle, a diamond, a pentagon, or a hexagon.

[0144] Specifically, the flow cross-section of the heat exchange tube 31 can be changed to meet the heat exchange requirements of the battery cells 10 with different heat dissipation requirements.

[0145] In some embodiments of the present application, as shown in Figures 14 and 15, the heat exchange tube 31 is a flat tube with a rectangular flow cross-section. Along the second direction, the size of the rectangle is greater than or equal to 2 mm, and along the third direction, the size of the rectangle ranges from 10 mm to 150 mm. The second direction is the direction from the battery cell 10 to the heat exchange tube 31, and the third direction is perpendicular to the second direction and parallel to the flow cross-section.

[0146] Specifically, the heat exchange tube 31 is configured as a flat tube to facilitate bending of the heat exchange tube 31 . At the same time, the flow cross-section of the flat tube is configured so that there is sufficient heat conduction area between the heat exchange tube 31 and the battery cell 10 , thereby effectively improving the heat exchange effect.

[0147] It should be pointed out that in the present application, as shown in FIG15 , the size of the rectangle along the second direction is L1, where the value of L1 can be 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0148] In addition, as shown in Figure 15, along the third direction, the size of the rectangle is L2, where the value of L2 can be 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, or 150mm.

[0149] In some embodiments of the present application, the corners of the flow channel of the heat exchange tube 31 are rounded along the circumferential direction of the heat exchange tube 31. By setting the corners of the flow channel as rounded, the resistance to the flow of the heat exchange medium is reduced, the flow rate of the heat exchange medium is increased, and the heat exchange efficiency is effectively improved.

[0150] In some embodiments of the present application, the heat exchange tube 31 is an integrally formed structure. Integrally forming the heat exchange tube 31 improves the processing convenience of the heat exchange tube 31 and reduces the leakage of the heat exchange medium compared to a spliced ​​structure.

[0151] A second aspect of the present application provides an electrical device, which includes the battery 100 as described above.

[0152] The electrical device has the battery 100 as described above. The beneficial effects of the battery 100 are the same as the beneficial effects of the battery 100 as described above, and will not be described in detail in this application.

[0153] 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.

[0154] In an embodiment of the present application, as shown in Figures 2 to 15, the present application proposes a battery 100, which includes a battery cell 10 and a heat exchange assembly 30. The number of battery cells 10 is multiple, and the multiple battery cells 10 are arranged in a first direction, which is the length direction or width direction of the battery 100. The heat exchange assembly 30 includes a heat exchange tube 31, which is an integrally formed structure, including a first heat exchange section 311, a second heat exchange section 312, a connecting section 313, a liquid inlet 314 and a liquid outlet 315. The liquid inlet 314 is connected to the connecting section 313 through the first heat exchange section 311, and the liquid outlet 314 is connected to the connecting section 313 through the second heat exchange section 312. The first heat exchange section 311 and the second heat exchange section 312 are arranged in parallel or intersecting. Each battery cell 10 is thermally connected to the first heat exchange section 311 and the second heat exchange section 312 respectively.

[0155] Furthermore, the first heat exchange section 311 and the second heat exchange section 312 are both arranged on the same side of the battery cell 10 , and the first heat exchange section 311 and the second heat exchange section 312 are respectively heat-conductingly connected to the same surface of the battery cell 10 .

[0156] Furthermore, the multiple surfaces include two largest surfaces, a first surface and a second surface. The two first surfaces are spaced apart, and the second surfaces are connected to the two first surfaces. The first heat exchange section 311 and the second heat exchange section 312 are respectively arranged perpendicular to the first surfaces. The second surfaces are thermally conductively connected to a portion of the first heat exchange section 311 and a portion of the second heat exchange section 312.

[0157] Furthermore, the liquid inlet 314 and the liquid outlet 315 are arranged on the same side of the heat exchange tube 31 , and the heat exchange assembly 30 further includes a collecting member 33 , which is connected to the liquid inlet 314 and the liquid outlet 315 respectively.

[0158] Furthermore, the first heat exchange section 311 is a first zigzag structure, presenting a first serpentine structure. The first zigzag structure includes multiple first heat exchange sections 3111 spaced apart in parallel. A single battery cell 10 is thermally connected to at least two first heat exchange sections 3111, with the first heat exchange sections 3111 being perpendicular to the battery cell 10. The second heat exchange section 312 is a second zigzag structure, presenting a second serpentine structure. The second zigzag structure includes multiple second heat exchange sections 3121 spaced apart in parallel. A single battery cell 10 is thermally connected to at least two second heat exchange sections 3121, with the second heat exchange sections 3121 being perpendicular to the battery cell 10. The first and second zigzag structures are spaced apart in parallel. On a single battery cell 10, the number of thermally connected first heat exchange sections 3111 and second heat exchange sections 3121 is equal.

[0159] Furthermore, the heat exchange assembly 30 further includes a temperature averaging plate 32. The heat exchange tubes 31 are thermally connected to one side of the temperature averaging plate 32, and at least some of the battery cells 10 are thermally connected to the other side of the temperature averaging plate 32. The temperature averaging plate 32 is made of aluminum, copper, or stainless steel.

[0160] When multiple battery cells 10 form a single-layer structure, the multiple battery cells 10 are arranged on the same side of the heat exchange tube 31 and are respectively thermally connected to the temperature averaging plate 32. A heat conducting medium 34 is provided between the battery cells 10 and the temperature averaging plate 32.

[0161] When multiple battery cells 10 form a double-layer structure, the multiple battery cells 10 constitute a first battery assembly 40 and a second battery assembly 50. The first battery assembly 40 and the second battery assembly 50 are located on opposite sides of the heat exchange tube 31. The first battery assembly 40 includes a first number of battery cells 10, and the second battery assembly 50 includes a second number of battery cells 10, where the first number is greater than the second number. The first number of battery cells 10 and the second number of battery cells 10 are both arranged along a first direction. The first battery assembly 40 includes a first portion 42 and a second portion 41. The first portion 42 is disposed opposite the second battery assembly 50, and the second portion 41 is staggered relative to the second battery assembly 50. A temperature averaging plate 32 is provided between the first portion 42 and the heat exchange tube 31, and a temperature averaging plate 32 is provided between the second battery assembly 50 and the heat exchange tube 31. A heat transfer medium 34 is provided between at least a portion of the second portion 41 and the heat exchange tube 31. A heat-conducting medium 34 is provided between the temperature-conducting plate 32 thermally connected to the first part 42 and the first part 42, and a heat-conducting medium 34 is provided between the temperature-conducting plate 32 thermally connected to the second battery assembly 50 and the second battery assembly 50; wherein, along the direction from the first battery assembly 40 to the second battery assembly 50, the size of the heat-conducting medium 34 thermally connected to the second part 41 is a first size, the size of the heat-conducting medium 34 thermally connected to the first part 42 is a second size, and the size of the heat-conducting medium 34 thermally connected to the second battery assembly 50 is a third size, the first size is greater than or equal to the second size, and the second size is equal to the third size.

[0162] In addition, the ratio of the second size to the first size is within a range of 1 / 3 to 1.

[0163] In addition, the heat exchange tube 31 is a flat tube with a rectangular flow cross-section. The corners of the rectangle are rounded. Along the second direction, the size of the rectangle is greater than or equal to 2 mm. Along the third direction, the size of the rectangle ranges from 10 mm to 150 mm. The second direction is the direction from the battery cell 10 to the heat exchange tube 31. The third direction is perpendicular to the second direction and parallel to the flow cross-section.

[0164] In the present application, during the use of the battery 100, each battery cell 10 exchanges heat with the first heat exchange section 311 and the second heat exchange section 312 respectively, and the first heat exchange section 311 is set to intersect or be parallel, so that the temperature difference between the first heat exchange section 311 and the second heat exchange section 312 at the heat conduction connection position of each battery cell 10 is close, thereby achieving uniform heat conduction to the multiple battery cells 10, and thereby effectively improving the problem of uneven heat and cold in the multiple battery cells 10.

[0165] 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 make equivalent replacements for some or all of the technical features therein. 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, wherein: The battery comprises: A battery cell, wherein the number of the battery cells is multiple and the multiple battery cells are arranged in a first direction, where the first direction is the length direction or the width direction of the battery; A heat exchange component, wherein the heat exchange component includes a heat exchange tube, and the heat exchange tube includes a first heat exchange section, a second heat exchange section, a connecting section, a liquid inlet and a liquid outlet. The liquid inlet is connected to the connecting section through the first heat exchange section, and the liquid outlet is connected to the connecting section through the second heat exchange section. The first heat exchange section and the second heat exchange section are arranged in parallel or intersecting, and each of the battery cells is thermally connected to the first heat exchange section and the second heat exchange section respectively.

2. The battery according to claim 1, wherein The first heat exchange section and the second heat exchange section are both arranged on the same side of the battery cell.

3. The battery according to claim 2, wherein The first heat exchange section and the second heat exchange section are respectively thermally connected to the same surface of the battery cell.

4. The battery according to any one of claims 1 to 3, wherein The battery cell includes multiple surfaces, including a first surface with the largest area. At least part of the first heat exchange section and at least part of the second heat exchange section are respectively intersected with an extended surface of the first surface.

5. The battery according to claim 4, wherein The multiple surfaces also include a second surface. The number of the first surfaces is two, the two first surfaces are spaced apart, the second surfaces are respectively connected to the two first surfaces, and the second surfaces are respectively thermally connected to the first heat exchange section and the second heat exchange section.

6. The battery according to any one of claims 1 to 5, wherein The liquid inlet and the liquid outlet are arranged on the same side of the heat exchange tube, and the heat exchange assembly further includes a collecting piece, which is connected to the liquid inlet and the liquid outlet respectively.

7. The battery according to any one of claims 1 to 6, wherein The first heat exchange section is a first bending structure, which is a first serpentine structure. The first bending structure includes a plurality of first heat exchange parts arranged in parallel and at intervals. The same battery cell is thermally connected to at least two first heat exchange parts.

8. The battery according to claim 7, wherein The second heat exchange section is a second bending structure, the second bending structure is a second serpentine structure, the second bending structure includes a plurality of second heat exchange parts arranged in parallel and spaced apart, and the same battery cell is thermally connected to at least two second heat exchange parts; Wherein, on the same battery cell, the number of the first heat exchange parts connected in a thermally conductive manner is equal to the number of the second heat exchange parts connected in a thermally conductive manner.

9. The battery according to claim 8, wherein The first bending structure and the second bending structure are arranged in parallel and spaced apart.

10. The battery according to claim 9, wherein The first heat exchange portion and the second heat exchange portion are both perpendicular to the battery cell.

11. The battery according to any one of claims 2 to 5, wherein The heat exchange assembly further includes a temperature averaging plate, the heat exchange tube is thermally connected to one side of the temperature averaging plate, and at least a portion of the battery cells are thermally connected to the other side of the temperature averaging plate.

12. The battery according to claim 11, wherein The temperature-averaging plate is an aluminum plate, a copper plate or a stainless steel plate.

13. The battery according to claim 11 or 12, wherein The plurality of battery cells are arranged on the same side of the heat exchange tube and are respectively connected to the temperature homogenizing plate in a heat-conducting manner.

14. The battery according to any one of claims 11 to 13, wherein A heat conducting medium is provided between the battery cell and the temperature equalizing plate.

15. The battery according to any one of claims 11 to 14, wherein Multiple battery cells constitute a first battery assembly and a second battery assembly, the first battery assembly and the second battery assembly are located on opposite sides of the heat exchange tube, the first battery assembly includes a first number of battery cells, and the second battery assembly includes a second number of battery cells, the first number is greater than the second number, and the first number of battery cells and the second number of battery cells are both arranged along the first direction.

16. The battery according to claim 15, wherein The first battery assembly includes a first part and a second part, the first part is arranged opposite to the second battery assembly, and the second part is staggered with the second battery assembly. The temperature equalizing plate is provided between the first part and the heat exchange tube, and the temperature equalizing plate is provided between the second battery assembly and the heat exchange tube. A heat conductive medium is provided between at least part of the second part and the heat exchange tube.

17. The battery according to claim 16, wherein The heat conducting medium is provided between the temperature averaging plate thermally connected to the first part and the first part, and the heat conducting medium is provided between the temperature averaging plate thermally connected to the second battery assembly and the second battery assembly; Among them, along the direction from the first battery assembly to the second battery assembly, the size of the heat-conducting medium thermally connected to the second part is a first size, the size of the heat-conducting medium thermally connected to the first part is a second size, and the size of the heat-conducting medium thermally connected to the second battery assembly is a third size, the first size is greater than or equal to the second size, and the second size is equal to the third size.

18. The battery according to claim 17, wherein The ratio of the second size to the first size is in the range of 1 / 3 to 1.

19. The battery according to any one of claims 1 to 18, wherein The flow cross-section of the heat exchange tube includes a rectangle, a circle, an ellipse, a triangle, a rhombus, a pentagon or a hexagon.

20. The battery according to claim 19, wherein The heat exchange tube is a flat tube, and the flow cross-section is rectangular. Along the second direction, the size of the rectangle is greater than or equal to 2 mm, and along the third direction, the size of the rectangle ranges from 10 mm to 150 mm. The second direction is the direction from the battery cell to the heat exchange tube, and the third direction is perpendicular to the second direction and parallel to the flow cross-section.

21. The battery according to claim 20, wherein Along the circumferential direction of the heat exchange tube, the corner position of the flow channel of the heat exchange tube is a rounded transition.

22. The battery according to any one of claims 1 to 18, wherein The heat exchange tube is an integrally formed structure.

23. An electrical device, wherein: The electric device comprises the battery according to any one of claims 1 to 22.

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