Battery box, battery, and electrical device

Abstract

A battery box, a battery, and an electrical device. The battery box includes a side plate and a bottom plate. The side plate is provided on the bottom plate surrounding the outer edge of the bottom plate. The bottom plate has a cavity, and a partition member is provided in the cavity. The partition member forms at least two flow paths that isolate the cavity and guide the flow along the first flow guiding direction. Since the flow guiding directions of each flow path are the same, the flows of each heat exchange working medium separated by each flow path in the cavity can respectively perform heat exchange on each battery cell arranged in a direction intersecting the first flow guiding direction at the same time, the heat exchange of the battery cells is uniform, and the temperature difference between the battery cells can be reduced.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the benefit of Chinese Patent Application No. 202223054353.9, filed on November 17, 2022, entitled "Battery Box, Battery and Electrical Device", the entire content of which is incorporated herein by reference.

[0002] This application relates to the field of batteries, and particularly to battery boxes, batteries and electrical devices.

Background Art

[0003] Energy conservation and emission reduction are key points in the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental friendliness. For electric vehicles, battery technology is also an important factor related to their development.

[0004] During the use of a battery, its internal temperature rises, and the performance of the battery cells inside the battery deteriorates due to too high a temperature. Therefore, usually, a cooling structure is provided to cool the battery cells. However, there is a problem that the cooling of the conventional cooling structure is not uniform.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of the above problems, this application provides a battery box, a battery and an electrical device in order to solve the problem that the cooling of battery cells by the cooling structure in the battery is not uniform.

Means for Solving the Problems

[0006] In a first aspect, the present application provides a battery box including a side plate and a bottom plate, wherein the side plate is provided on the bottom plate surrounding the outer edge of the bottom plate, the bottom plate has a cavity, a partition member is provided in the cavity, and the partition member forms at least two flow paths that isolate the cavity and guide the flow along a first flow guiding direction.

[0007] In the technical solution of the embodiment of the present application, after the heat exchange working medium enters the cavity of the bottom plate, a plurality of flows of the heat exchange working medium are formed, and each flows along the first flow guiding direction through each flow path and finally flows out of the bottom plate. Since the flow guiding directions of each flow path are the same, the flows of the heat exchange working medium separated by each flow path in the cavity can respectively perform heat exchange on each battery cell arranged in a direction intersecting the first flow guiding direction at the same time, the flow rate can be allocated relatively uniformly, the battery cells in the second direction can perform heat exchange almost synchronously, the uniformity of the heat exchange of the battery cells is high, the temperature difference between the battery cells is reduced, and it contributes to improving the heat management performance of the battery.

[0008] In some embodiments, the partition member includes a first partition member, and an end portion of the first partition member close to the inlet end of the flow path communicates two adjacent flow paths with each other. In this case, the inlet ends of two adjacent communicating flow paths communicate with each other, and the heat exchange working medium can flow between the inlet ends of each communicating flow path. When transporting the heat exchange working medium to the inlet ends of the adjacent communicating flow paths, an operating medium inlet for transporting the heat exchange working medium to only one of the inlet ends can be arranged, the number of the operating medium inlets can be reduced, and the manufacturing cost of the battery box can be reduced.

[0009] In some embodiments, in the first flow guiding direction, an end portion of each first partition member close to the inlet end is provided at a distance from the inner wall of the cavity. In this case, since the first end of the first partition member is provided at a distance from the inner wall of the cavity, adjacent flow paths are communicated with each other, the structure is simple, and it contributes to reducing the manufacturing cost of the battery box.

[0010] In some embodiments, the isolation member includes a second isolation member. In the first flow guiding direction, the end portion of the second isolation member close to the inlet end of the flow path cooperates with the inner wall of the cavity to prevent the heat exchange working medium from flowing between two adjacent flow paths adjacent to itself. In this case, since the inlet ends of each closed flow path are substantially non - communicating, the heat exchange working medium assigned to the inlet end of each closed flow path flows only along the closed flow path without mixing into other flow paths, which can increase the content of the heat exchange working medium in the closed flow path and enhance the heat exchange effect on the battery cell.

[0011] In some embodiments, in the first flow guiding direction, the end portion of each second isolation member close to the inlet end of the flow path is connected to the inner wall of the cavity. In this case, by directly connecting the first end of the second isolation member to the first inner wall of the cavity, it is achieved that the adjacent closed flow paths are substantially non - communicating, the structure is simple, and the fluid isolation effect at the inlet ends of the adjacent closed flow paths can be enhanced.

[0012] In some embodiments, in the first flow guiding direction, the end portion of at least one isolation member close to the outlet end of the flow path is configured to communicate the adjacent flow paths. In this case, the outlet ends of the adjacent flow paths communicate with each other, and only one working medium outlet for the heat exchange working medium to flow out of the bottom plate needs to be provided, which contributes to reducing the installation cost of the working medium outlet. Only the second ends of some isolation members may communicate the adjacent flow paths. In this case, the outlet ends of some adjacent flow paths communicate with each other, and the outlet ends of some adjacent flow paths do not communicate with each other. Then, one working medium outlet can be provided corresponding to the outlet ends of the flow paths that communicate with each other.

[0013] In some embodiments, the end portion of at least one isolation member close to the outlet end of the flow path is provided at a distance from the inner wall of the cavity. In this case, the second ends of each isolation member are arranged at a distance from the second inner wall of the cavity to form a communication space, thereby communicating the outlet ends of each flow path. The structure of the bottom plate is simple and the manufacturing cost is low.

[0014] In some embodiments, the bottom plate includes a working medium inlet and a working medium outlet, and each flow path includes an inlet end and an outlet end provided to face away from each other in a first flow guiding direction. The working medium inlet communicates with any of the inlet ends, and the working medium outlet communicates with any of the outlet ends. In this case, the working medium inlet and the working medium outlet are used to achieve the purpose of allowing the heat exchange working medium to enter and exit the bottom plate.

[0015] In some embodiments, the outlet ends of the respective flow paths communicate with each other. When the outlet ends of the respective flow paths communicate with each other, it is possible to realize the outflow of the heat exchange working medium by providing only one working medium outlet, and it is possible to extend the residence time of the heat exchange working medium in the cavity, contributing to reducing the cost of the bottom plate and enhancing the heat exchange effect.

[0016] In some embodiments, the working medium inlet and the working medium outlet are located on opposite sides of the bottom plate in the first flow guiding direction. The working medium inlet is provided near the inlet end of the flow path, and the working medium outlet is provided near the outlet end of the flow path. In this case, the distance between the working medium inlet and the inlet end of the flow path is short, and the distance between the working medium outlet and the outlet end of the flow path is short, which can reduce the loss of the cooling capacity of the heat exchange working medium during flow and enhance the energy utilization rate.

[0017] In some embodiments, the bottom plate further includes a first retaining rib, and a water retaining path is defined by the first retaining rib and the inner wall of the cavity, and the water retaining path communicates with the working medium inlet. A first fluid passage portion is formed in the first retaining rib, and the first fluid passage portion communicates the water retaining path with the inlet end of the adjacent flow path. In this case, the first retaining rib forms a water retaining path, and then the first fluid passage portion formed in the first retaining rib provides the heat exchange working medium to the flow path, and the arrangement of the heat exchange working medium inlet is flexible.

[0018] In some embodiments, the bottom plate further includes a second retaining rib. An outlet channel is defined by the second retaining rib and the inner wall of the cavity. A second fluid passage portion is formed in the second retaining rib. The second fluid passage portion communicates the outlet channel with the outlet end of the flow channel adjacent to the outlet channel. The outlet channel communicates with the working medium outlet. In this case, the outlet channel is communicated with the outlet end of the flow channel through the second fluid passage portion, the working medium outlet communicates with the outlet channel, and the arrangement of the working medium outlet is flexible.

[0019] In some embodiments, one working medium inlet and one working medium outlet are both arranged. The working medium inlet communicates with the inlet ends of all the flow channels, and the working medium outlet communicates with the outlet ends of all the flow channels. The working medium inlet and the working medium outlet are located on the same side of the bottom plate. In this case, by arranging one working medium inlet and one working medium outlet, the circulation of the heat exchange working medium in the bottom plate is realized, and the cost is low. Also, since the working medium inlet and the working medium outlet are located on the same side of the bottom plate, it is easier to attach the pipelines communicating with the heat exchange working medium to the working medium inlet and the working medium outlet, and it is also easier to arrange the pipelines, and the occupied space in the first flow guiding direction of the bottom plate can be reduced, and the structure of the bottom plate is more compact.

[0020] In some embodiments, a working medium general inlet and a working medium general outlet are provided on the side plate. The working medium inlet communicates with the working medium general inlet, and the working medium outlet communicates with the working medium general outlet. In this case, since the working medium general inlet and the working medium general outlet are provided on the side plate and the space of the side plate is sufficient, it is easier to provide the working medium general inlet and the working medium general outlet.

[0021] In some embodiments, a space is configured to communicate the working medium inlet with the working medium general inlet within the side plate, and / or a space is configured to communicate the working medium outlet with the working medium general outlet within the side plate. When the heat exchange working medium flows through the space inside the side plate, the side plate can be used to cool the side portion of the battery cell to lower the temperature. In this way, the heat exchange effect on the battery cell can be enhanced, and the energy utilization rate of the coolant can also be enhanced.

[0022] In a second aspect, embodiments of the present application further provide a battery including the battery box in any one of the above embodiments and battery cells accommodated in the battery box.

[0023] In some embodiments, the battery further includes a thermal management member. The thermal management member is located within a space formed by surrounding a side plate and a bottom plate and is provided on the side plate. The thermal management member is in surface contact with at least one battery cell and has a flow space through which a heat exchange working medium flows. In this case, arranging the thermal management member within the battery box can not only reinforce the structure of the battery box, but also increase the heat exchange between the heat exchange working medium and the battery cell located at the central position among the heat exchange working medium and the battery cells when the heat exchange working medium flows through its interior, thereby enhancing the heat exchange efficiency of the battery cells.

[0024] In some embodiments, the bottom plate includes a working medium inlet and a working medium outlet, and a working medium general inlet and a working medium general outlet are provided on the side plate. The working medium inlet and the working medium general inlet communicate with each other through the flow space, and / or the working medium outlet and the working medium general outlet communicate with each other through the flow space. In this case, the heat exchange working medium flowing through the flow space and the heat exchange working medium flowing through the bottom plate belong to the same flow of the heat exchange working medium, which not only extends the flow path of the heat exchange working medium and improves the energy utilization rate of the heat exchange working medium, but also simplifies the structure of the battery and can reduce costs.

[0025] In a third aspect, embodiments of the present application further provide an electrical device including the above battery for providing electrical energy.

[0026] The above description is merely a summary of the technical solutions of the present application. In order to more clearly understand the technical solutions of the present application, it can be implemented according to the content of the specification. Also, in order to make the above and other objects, features, and advantages of the present application clearer and easier to understand, specific embodiments of the present application are given below.

Brief Description of the Drawings

[0027] After reading the detailed description of the following preferred embodiments, various other advantages and beneficial aspects will become apparent to those skilled in the art. The drawings are only intended to illustrate the preferred embodiments and are not considered to be limitations on the present application. Also, in all the drawings, the same reference numerals represent the same members.

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Embodiments for Carrying Out the Invention

[0028] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following embodiments are only used as examples to more clearly illustrate the technical solution of the present application, and thus should not be used to limit the protection scope of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the present application. The terms "comprising" and "having" and any variations thereof in the description of the specification, claims and drawings of the present application are intended to cover the non-exclusive "comprising".

[0030] In the description of the embodiments of the present application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be understood as indicating or implying relative importance or indicating the number of technical features, specific order or primary-secondary relationship. In the description of the embodiments of the present application, unless otherwise clearly and specifically limited, "a plurality" means two or more.

[0031] When referring to "embodiments" in this specification, it means that the specific features, structures or characteristics described in accordance with the embodiments may be included in at least one embodiment of the present application. This phrase described in each part of the specification does not necessarily refer to the same embodiment, nor is it an exclusive, separate or alternative embodiment that is mutually exclusive with other embodiments. A person skilled in the art can explicitly and implicitly understand that the embodiments described in this specification can be combined with other embodiments.

[0032] In the description of the embodiments of the present application, the term "and / or" is only used to describe the relationship between related objects and represents that three relationships are possible. For example, A and / or B can represent three cases: A alone, a combination of A and B, and B alone. Also, the character " / " in this specification generally represents that the related objects before and after are in an "or" relationship.

[0033] In the description of the embodiments of the present application, the term "a plurality" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of sheets" refers to two or more sheets (including two sheets).

[0034] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "vertical direction", "horizontal direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of explaining and simplifying the description of the embodiments of the present application, and does not indicate or imply that the indicated device or element must have a specific orientation and be configured and operate in a specific orientation. Therefore, it should not be understood as limiting the embodiments of the present application.

[0035] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, technical terms such as "attach", "connect", "connect", "fix" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or the internal communication between two elements or the interaction relationship between two elements. A person skilled in the art can understand the specific meaning of the above terms in the embodiments of the present application according to the specific situation.

[0036] The battery box is an important component of the battery, mainly playing a role in protecting the battery system from external collisions and at the same time ensuring that the internal temperature of the battery is within a certain range.

[0037] The applicant has noticed that in the related art, a part of the structure of the battery box is used as a coolant flow structure to lower the temperature of the battery cells mounted inside the battery box. However, in the conventional battery box, there is a problem that the cooling is not uniform when lowering the temperature of the battery cells. The applicant has studied the cause and found that when the working medium inlet and the working medium outlet of the battery box are on the same side and the coolant flows from the working medium inlet to the working medium outlet, the flow path of the coolant is U-shaped, so that the battery cells located upstream of the coolant flow path are cooled first, and the temperature of the coolant rises, so that the cooling ability of the coolant located downstream of the coolant flow path is weaker than that of the coolant located upstream, and the cooling of the battery cells is not uniform.

[0038] Based on the above considerations, in order to solve the problem of non-uniform cooling of battery cells due to the cooling structure of the conventional battery, the applicant has made intensive research and designed a battery box including a side plate and a bottom plate, the side plate being attached to the bottom plate and surrounding the outer edge of the bottom plate. At least two flow paths are formed in the bottom plate, and the coolant flows along the same flow guide direction in each of the flow paths, so that the temperature of the coolant flowing through each flow path is relatively uniform, and the bottom plate can uniformly cool the battery cells in the direction perpendicular to the first flow guide direction, thereby improving the uniformity of heat exchange of the battery cells and reducing the temperature difference between the battery cells.

[0039] In the embodiments of the present application, a battery box, a battery and an electric device are provided to solve the problem of uneven cooling of battery cells due to a cooling structure in a battery.

[0040] After storing battery cells in the battery box disclosed in the embodiments of the present application, a battery can be formed. In the battery, the number of battery cells may be plural, and the connection between the plural battery cells may be series connection, parallel connection, or series-parallel connection. Series-parallel connection means that it includes both series connection and parallel connection for the plural battery cells. The plural battery cells may be directly connected in series, in parallel, or in series-parallel, and then the whole composed of the plural battery cells may be stored in the box. Of course, the battery may first connect the plural battery cells in series, in parallel, or in series-parallel to form the form of a battery module, and then further connect the plural battery modules in series, in parallel, or in series-parallel to form one whole and store it in the box. The battery may further include other structures. For example, the battery may further include a bus bar member for realizing the electrical connection between the plural battery cells.

[0041] Each battery cell may be a secondary battery or a primary battery, and may be a lithium-sulfur battery, a sodium-ion battery, a magnesium-ion battery, etc., but is not limited thereto. The battery cell may have a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes.

[0042] The battery can be used as the power source of an electrical device. The electrical device may be a mobile phone, a tablet, a notebook computer, an electric toy, a power tool, an electric bike, an electric vehicle, a ship, an aircraft, etc., but is not limited thereto. As its features, the electric toy may include fixed or mobile electric toys such as a game console, an electric vehicle toy, an electric propulsion ship toy, and an electric airplane toy, and the aircraft may include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0043] In the following embodiments, for the sake of easy explanation, the case where the electrical device according to an embodiment of the present application is the vehicle 1000 will be described as an example.

[0044] Referring to FIG. 1, FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 may be a gasoline vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a secondary battery electric vehicle, a hybrid electric vehicle, an extended-range electric vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to supply power to the vehicle 1000. For example, the battery 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300. For example, it is used to meet the needs of the operating power during the start, navigation, and driving of the vehicle 1000.

[0045] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000 to provide driving power to the vehicle 1000 instead of gasoline or natural gas, or instead of a part of them.

[0046] Referring to FIG. 2, FIG. 2 is an exploded schematic structural diagram of a battery cell 20 provided by some embodiments of the present application. The battery cell 20 is the smallest unit that constitutes the battery. As shown in FIG. 2, the battery cell 20 includes an end cap 21, a case 22, a cell assembly 23, and other functional members.

[0047] The end cap 21 refers to a member that covers the opening of the case 22 so as to isolate the internal environment of the battery cell 20 from the external environment. Optionally, the end cap 21 can be manufactured from a material (such as an aluminum alloy) having a certain hardness and strength. In this way, the end cap 21 is less likely to be distorted when pressed and collided, and the battery cell 20 can have higher structural strength and can also enhance the safety performance. Functional members such as the electrode terminal 21a may be provided on the end cap 21. The electrode terminal 21a can be used to be electrically connected to the cell assembly 23 in order to output or input the electrical energy of the battery cell 20.

[0048] The case 22 is an assembly for forming the internal environment of the battery cell 20 in accordance with the end cap 21. Its feature is that the formed internal environment can be used to accommodate the cell assembly 23, the electrolyte and other members. The case 22 and the end cap 21 may be independent members. An opening can be provided in the case 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cap 21 at the opening. The case 22 may have various shapes and various dimensions such as, for example, a rectangular parallelepiped shape, a cylindrical shape, a hexagonal prism shape, etc. The case 22 may be made of various materials such as, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not particularly limit this.

[0049] The cell assembly 23 is a member in which an electrochemical reaction occurs in the battery cell 20. One or more cell assemblies 23 can be included in the case 22. The cell assembly 23 is mainly formed by winding or laminating a positive electrode plate and a negative electrode plate, and usually, a separator is provided between the positive electrode plate and the negative electrode plate. The portions having the active materials of the positive electrode plate and the negative electrode plate constitute the main body of the cell assembly, and the portions having no active materials of the positive electrode plate and the negative electrode plate respectively constitute tabs. The positive electrode tab and the negative electrode tab may both be located at one end of the main body, or may be located at both ends of the main body respectively. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the electrode terminals so as to form an electric current circuit.

[0050] In the embodiments of the present application, the "heat exchange working medium" mentioned may be a cooling working medium or a heating working medium. Regardless of the type of the heat exchange working medium, the battery box 10 provided by the embodiments of the present application can evenly allocate the flow rate of the heat exchange working medium and reduce the temperature difference between the battery cells 20 in the battery 100. In the embodiments of the present application, the effect of the battery box 10 is described by taking the example that the "heat exchange working medium" has a heat exchange effect, but the type of the heat exchange working medium in the battery box 10 is not limited. As can be understood, when the heat exchange working medium in the battery box 10 is a heating working medium, the battery cells 20 can be heated and the temperature can be increased in a low-temperature environment, and the temperature difference between the battery cells 20 can be reduced, and the temperature balance of the battery cells 20 can be enhanced.

[0051] Hereinafter, the battery box disclosed by the embodiments of the present application will be described in detail.

[0052] FIG. 3 shows a structural schematic diagram of the battery box 10 in some embodiments of the present application. FIG. 4 shows a distribution schematic diagram of the flow path s of the bottom plate 12 in the battery box 10 in some embodiments of the present application.

[0053] Referring to FIGS. 3 and 4, the battery box 10 provided by some embodiments of the present application includes a side plate 11 and a bottom plate 12. The side plate 11 is provided on the bottom plate 12 surrounding the outer edge of the bottom plate 12. The bottom plate 12 has a cavity 12a, and a partition member 12b is provided in the cavity 12a. The partition member 12b isolates the cavity 12a and forms at least two flow paths s for guiding the flow along the first flow guiding direction F1.

[0054] The bottom plate 12 is usually plate-shaped. The thickness direction of the bottom plate 12 refers to the direction in which its dimension is the smallest. The outer edge of the bottom plate 12 refers to the edge of the contour provided around its thickness direction. The side plate 11 surrounds the outer edge of the bottom plate 12, and its structure adapts to the shape of the outer edge contour of the bottom plate 12. When the outer edge of the bottom plate 12 presents a circular shape, the side plate 11 surrounds it in a circular shape. When the outer edge of the bottom plate 12 presents a square shape, the side plate 11 surrounds it to form a square shape. The side plate 11 may be integrally formed or separately formed, but it is not limited here. A cover can be further provided on the battery box 10. The cover is provided on the side away from the bottom plate 12 of the side plate 11. Moreover, the cover, the side plate 11, and the bottom plate 12 together form a storage cavity that surrounds and stores the battery cell 20.

[0055] A cavity 12a is formed inside the bottom plate 12, and a partition member 12b is provided in the cavity 12a. The partition member 12b and the wall of the cavity 12a may be provided separately and joined together, or may be integrally provided, without limitation. The structure forming the cavity 12a may be formed by joining a plurality of members together, or may be integrally formed by one member. The partition member 12b may present a plate shape, a sheet shape, etc., and is provided to extend substantially along the first flow guiding direction F1.

[0056] When actually applied, the first flow guiding direction F1 can correspond to the length direction of the bottom plate 12. When a square battery cell is stored in the battery box 10, the side surface with a large surface area of the battery cell 20 extends along the first flow guiding direction F1.

[0057] The heat exchange working medium flowing through each flow path s may be a gaseous refrigerant (e.g., Freon) or liquid water, etc., as long as its temperature meets the needs. Each flow path s is arranged in parallel in a direction intersecting the first flow guiding direction F1 (i.e., the second direction F3), and the heat exchange working medium flows from the inlet end i1 of each flow path s to the outlet end u1 of each flow path along the first flow guiding direction F1 via each flow path s. The first flow guiding direction F1 may be a straight line direction, a curved direction, etc. As can be understood, each flow path s has an inlet end i1 and an outlet end u1 provided opposite to each other in the first flow guiding direction F1, and the heat exchange working medium flows from the inlet end i1 of each flow path s to the outlet end u1 of each flow path s and finally flows out of the bottom plate 12. The inlet end i1 of each flow path s is located on the same one side in the first flow guiding direction F1, and the outlet end u1 of each flow path s is located on the same other side in the first flow guiding direction F1.

[0058] The inlet ends i1 of each flow path s may or may not communicate with each other, or may partially communicate with each other. The outlet ends u1 of each flow path s may or may not communicate with each other, or may partially communicate with each other, and are not limited in this embodiment.

[0059] In the above battery box 10, after the heat exchange working medium enters the cavity 12a of the bottom plate 12, it first flows to the inlet end i1 of each flow path s, and flows of a plurality of heat exchange working media are formed. Each of them flows from the inlet end i1 of each flow path s to the outlet end u1 of each flow path along the first flow guiding direction F1 via each flow path s, and finally flows out of the bottom plate 12.

[0060] Since the flow guiding directions of each flow path s are the same, the flows of each heat exchange working medium separated by each flow path s in the cavity 12a can each perform heat exchange with respect to each battery cell 20 arranged in a direction intersecting the first flow guiding direction F1 (defined as the second direction F3) at the same time, the flow rate can be allocated relatively uniformly, the battery cells 20 in the second direction F3 can perform heat exchange almost synchronously, the uniformity of heat exchange of the battery cells 20 is high, the temperature difference between the battery cells 20 is reduced, and it contributes to improving the heat management performance of the battery 100.

[0061] In some embodiments, referring to FIG. 4, the isolation member 12b includes a first isolation member b1, and an end portion of the first isolation member b1 close to the inlet end i1 of the flow path s communicates two flow paths s adjacent to itself.

[0062] In the embodiments of the present application, for ease of description, an end portion of the isolation member 12b close to the inlet end i1 of the flow path s is defined as the first end, and the other end is defined as the second end. A flow path formed by being isolated by the first isolation member b1 is defined as a communication flow path s2.

[0063] Since the first end of the first isolation member b1 communicates two flow paths s adjacent to itself, the inlet ends i1 of two adjacent communication flow paths s2 communicate. As can be understood, the first isolation member b1 has a guide portion b11 at its first end, and the first isolation member b1 communicates two adjacent communication flow paths s2 through its own guide portion b11. The guide portion b11 may be a guide gap, a guide hole, etc., as long as it can communicate two adjacent communication flow paths s2.

[0064] In this case, the inlet ends i1 of two adjacent communication flow paths s2 communicate, and the heat exchange working medium can flow between the inlet ends i1 of each communication flow path s2. When transporting the heat exchange working medium to the inlet ends i1 of adjacent communication flow paths s2, an operating medium inlet i for transporting the heat exchange working medium to only one of the inlet ends i1 can be arranged, reducing the number of operating medium inlets i and reducing the manufacturing cost of the battery box 10.

[0065] In some embodiments, referring to FIG. 4, in the first flow guiding direction F1, an end portion of each first isolation member b1 close to the inlet end i1 is provided at a distance from the inner wall of the cavity 12a.

[0066] In the embodiments of the present application, for ease of explanation, the inner wall of the cavity 12a facing the first end of each isolation member 12b in the first flow guiding direction F1 is defined as the first inner wall a1, and the inner wall of the cavity 12a facing the second end of each isolation member 12b in the first flow guiding direction F1 is defined as the second inner wall a2.

[0067] The guide portion b11 formed by the first end of each first isolation member b1 and the inner wall of the cavity 12a with a gap in the first flow guiding direction F1 is the guide gap, that is, the first end of the first isolation member b1 and the first inner wall of the cavity 12a form a guide gap with a gap.

[0068] The value of the size of the guide gap may be between 1 millimeter (mm) and 60 millimeters (mm). The larger the value of the guide gap, the smoother the heat exchange working medium can flow at the inlet end i1 of each adjacent communication flow path s2, the more uniform the content of the heat exchange working medium entering each communication flow path s2, the more uniform the heat exchange effect by the heat exchange working medium in each communication flow path s2, the higher the uniformity of heat exchange of the battery cell 20, and the smaller the temperature difference between the battery cells 20.

[0069] In this case, since the first end of the first isolation member b1 is provided with a gap from the inner wall of the cavity 12a, the adjacent flow paths s are communicated, the structure is simple, and it contributes to reducing the manufacturing cost of the battery box 10.

[0070] FIG. 5 shows a distribution schematic diagram of the flow paths s of the bottom plate 12 of the battery box 10 in some other embodiments of the present application.

[0071] In some embodiments, referring to FIG. 5, the isolation member 12b includes a second isolation member b2. In the first flow guiding direction F1, the end of the second isolation member b2 close to the inlet end i1 of the flow path s cooperates with the inner wall of the cavity 12a to prevent the heat exchange working medium from flowing between the two adjacent flow paths s adjacent to itself.

[0072] In the embodiment of the present application, for the sake of easy explanation, the flow path formed by being isolated by the second isolation member b2 is defined as a closed flow path s1. The end of the second isolation member b2 close to the inlet end i1 of the flow path s is the first end of the second isolation member b2.

[0073] The first end of the second isolation member b2 and the first inner wall a1 of the cavity 12a cooperate to prevent the heat exchange working medium between two adjacent closed flow paths s1 from flowing into each other. In order to realize that the heat exchange working medium does not flow into each other between two adjacent closed flow paths s1, the first end of the second isolation member b2 and the first inner wall a1 of the cavity 12a may be completely connected, or may be provided with a gap. As long as the size of this gap is small enough to substantially prevent the heat exchange working medium from flowing between the two closed flow paths s1. For example, when the gap between the first end of the second isolation member b2 and the first inner wall a1 of the cavity 12a does not exceed 0.5 mm, as proved by tests, the flow resistance between the first end of the second isolation member b2 and the first inner wall a1 of the cavity 12a is large, the heat exchange working medium does not substantially flow between adjacent closed flow paths s1, and the blocking effect between the inlet ends i1 of adjacent closed flow paths s1 is good. As can be understood, each closed flow path s1 is provided in parallel in a direction intersecting the first flow guiding direction F1 (i.e., the second direction F3).

[0074] Since the inlet ends i1 of each closed flow path s1 are not substantially in communication with each other, the heat exchange working medium assigned to the inlet end i1 of each closed flow path s1 flows only along the closed flow path s1 without mixing into other flow paths s, which can increase the content of the heat exchange working medium in the closed flow path s1 and enhance the heat exchange effect on the battery cell 20.

[0075] As can be understood, since the inlet ends i1 of each closed flow path s1 are not in communication with each other, when actually applied, one communicating working medium inlet can be arranged for the inlet end i1 of each closed flow path s1, and each working medium inlet independently assigns the heat exchange working medium to each closed flow path s1.

[0076] In some embodiments, in the first flow guiding direction F1, the end of each second isolation member b2 close to the inlet end i1 of the flow path s is connected to the inner wall of the cavity 12a.

[0077] To realize that the inlet ends i1 of adjacent closed flow paths s1 do not communicate, the first end of the second isolation member b2 and the first inner wall a1 of the cavity 12a are directly connected by adhesion, welding, integral molding connection, contact connection, etc.

[0078] In this case, by directly connecting the first end of the second isolation member b2 to the first inner wall of the cavity 12a, it is achieved that the adjacent closed flow paths s1 do not substantially communicate with each other, the structure is simple, and the fluid isolation effect of the inlet ends i1 of the adjacent closed flow paths s1 can be enhanced.

[0079] In some embodiments, referring to FIG. 5, the isolation member 12b includes a first isolation member b1 and a second isolation member b2. The first isolation member b1 is located within the closed flow path s1 defined by the second isolation member b2. The inlet ends i1 of adjacent closed flow paths s1 do not communicate. The first isolation member b1 forms a plurality of communication flow paths s2 that isolate the closed flow path s1 where it is located and whose inlet ends i1 communicate with each other.

[0080] For details of the description of the first isolation member b1, the second isolation member b2, the closed flow path s1, and the communication flow path s2, refer to the above description. In this case, communication flow paths s2 are provided within the closed flow path s1. The inlet ends i1 of the communication flow paths s2 located within the closed flow path s1 communicate through one working medium inlet i, and a heat exchange working medium can be provided through the working medium inlet i, contributing to the reduction of the number of working medium inlets i. At the same time, the heat exchange working medium of the closed flow path s1 is shunted into each communication flow path s2 by using the first isolation member b1, making the allocation of the heat exchange working medium more uniform and the heat exchange effect better.

[0081] In a specific embodiment, in the first flow guiding direction F1, the distance between the upstream end of each first isolation member b1 located in the same closed flow path s1 and the inner wall of the cavity 12a is not equal. Specifically, the closer the communication flow path s2 is to the working medium inlet i, the smaller the distance between the first end of the first isolation member b1 that isolates and forms the communication flow path s2 and the first inner wall a1 of the cavity 12a, and conversely, it becomes larger, so that the flow rate of the heat exchange working medium flowing into each communication flow path s2 becomes more uniform, contributing to realizing uniform cooling of the battery cell 20.

[0082] In some embodiments, referring to FIGS. 4 and 5, in the first flow guiding direction F1, the end portion of at least one isolation member 12b close to the outlet end u1 of the flow path s is configured to communicate with the adjacent flow path s.

[0083] The end portion of the isolation member 12b close to the outlet end u1 of the flow path s is the second end of the isolation member 12b. The second end of the isolation member 12b communicating with the adjacent flow path s may be that the second end of the isolation member 12b is connected to the second inner wall a2 of the cavity 12a, and a communication structure (such as a communication hole, a communication gap) is formed at the second end of the isolation member 12b.

[0084] As can be understood, the bottom plate 12 has a working medium outlet u for the cooling medium to flow out of the bottom plate 12. When the second end of at least one isolation member 12b communicates with the adjacent flow path s, it indicates that the outlet ends u1 of at least a part of the flow paths s communicate. In this case, for this part of the communicating flow paths s, only one working medium outlet u may be provided for the heat exchange working medium of this part of the flow paths s to flow out of the bottom plate 12, reducing the number of working medium outlets u, simplifying the structure of the bottom plate 12, and reducing costs.

[0085] The second ends of the respective isolation members 12b may all communicate with the adjacent flow paths s. In this case, the outlet ends u1 of the adjacent flow paths s communicate with each other, and only one working medium outlet u for the heat exchange working medium to flow out of the bottom plate 12 needs to be provided, which contributes to reducing the installation cost of the working medium outlet u. The second ends of some of the isolation members 12b may communicate with the adjacent flow paths s. In this case, the outlet ends u1 of some of the adjacent flow paths s communicate with each other, and the outlet ends u1 of some of the adjacent flow paths s do not communicate with each other. Then, one working medium outlet u can be provided corresponding to the outlet ends u1 of the flow paths s that communicate with each other.

[0086] In some embodiments, referring to FIGS. 4 and 5, an end portion of at least one isolation member 12b close to the outlet end u1 of the flow path s is provided at a distance from the inner wall of the cavity 12a.

[0087] The fact that the end portion of the isolation member 12b close to the outlet end u1 of the flow path s is provided at a distance from the inner wall of the cavity 12a means that the second end of the isolation member 12b and the second inner wall a2 of the cavity 12a are arranged at a distance from each other, forming a communication space, and the communication between the outlet ends u1 of the adjacent flow paths s can be realized through the communication space.

[0088] In this case, the second ends of the respective isolation members 12b are arranged at a distance from the second inner wall a2 of the cavity 12a to form a communication space, thereby communicating the outlet ends u1 of the respective flow paths s, the structure of the bottom plate 12 is simple, and the manufacturing cost can be reduced.

[0089] In some embodiments, the bottom plate 12 includes a working medium inlet i and a working medium outlet u, and each flow path s includes an inlet end i1 and an outlet end u1 provided so as to face away from each other in the first flow guiding direction F1. The working medium inlet i communicates with each of the inlet ends i1, and the working medium outlet u communicates with each of the outlet ends u1.

[0090] One working medium inlet i can communicate with the inlet end i1 of at least one flow path s, and one working medium outlet u communicates with the outlet end u1 of at least one flow path s. When all the isolation members 12b are the first isolation members b1, the inlet ends i1 of each flow path s communicate with each other, and one working medium inlet i may be arranged, or a plurality of working medium inlets i may be arranged. When the isolation member 12b includes the second isolation member b2, different working medium inlets i communicate with each of the closed flow paths s1 formed by being isolated by the second isolation member b2. When the outlet ends u1 of the flow paths s communicate with each other, only one working medium outlet u can be arranged; when they do not communicate with each other, working medium outlets u are arranged respectively.

[0091] The heat exchange working medium enters the cavity 12a through the working medium inlet i, then flows to the inlet end i1 of each flow path s, flows to each outlet end u1 under the guidance of each flow path s, and finally flows out of the bottom plate 12 through the working medium outlet u. The working medium inlet i and the working medium outlet u may be provided in the joint provided on the bottom plate 12.

[0092] In this case, the purpose that the heat exchange working medium enters and exits the bottom plate 12 is realized by the working medium inlet i and the working medium outlet u.

[0093] In some embodiments, the outlet ends u1 of each flow path s communicate with each other. Specifically, by arranging the second ends of each isolation member 12b at intervals from the second inner wall a2 of the cavity 12a, the outlet ends u1 of each flow path s can be made to communicate with each other.

[0094] When the outlet ends u1 of each flow path s communicate with each other, the outflow of the heat exchange working medium can be realized only by providing one working medium outlet u, and the residence time of the heat exchange working medium in the cavity 12a can be extended, which contributes to reducing the cost of the bottom plate 12 and enhancing the heat exchange effect.

[0095] In some embodiments, referring to FIGS. 4 and 5, the working medium inlet i and the working medium outlet u are located on opposite sides of the bottom plate 12 in the first flow guiding direction F1. The working medium inlet i is provided near the inlet end i1 of the flow path s, and the working medium outlet u is provided near the outlet end u1 of the flow path s.

[0096] The working medium inlet i communicates with the inlet end i1 of the flow path s, and the working medium outlet u communicates with the outlet end u1 of the flow path s. The working medium inlet i is provided on the side corresponding to the inlet end i1, and the working medium outlet u is provided on the side corresponding to the outlet end u1. In this way, the distance between the working medium inlet i and the inlet end i1 of the flow path s is close, and the distance between the working medium outlet u and the outlet end u1 of the flow path s is close, which can reduce the loss during the cooling capacity of the heat exchange working medium during flow and improve the energy utilization rate.

[0097] Of course, in other embodiments, the working medium inlet i and the working medium outlet u may be provided on the same side or different sides of the first flow guiding direction F1, or arranged on both sides adjacent to the bottom, and are not specifically limited.

[0098] FIG. 6 shows a distribution schematic diagram of the flow path s of the bottom plate 12 in some embodiments of the present application. FIGS. 7 and 8 are enlarged views of locations I and II in FIG. 6, respectively.

[0099] In some embodiments, referring to FIGS. 6 and 7, the bottom plate 12 further includes a first retaining rib 12c. A water retaining path k is defined by the first retaining rib 12c and the inner wall of the cavity 12a, and the water retaining path k communicates with the working medium inlet i. A first fluid passage portion c1 is formed in the first retaining rib 12c, and the first fluid passage portion c1 communicates the water retaining path k with the inlet end i1 of the flow path s adjacent thereto.

[0100] The first holding rib 12c and the inner wall of the cavity 12a can be connected by means such as integral molding, adhesion, welding, etc. The first holding rib 12c may be in the shape of a plate or a sheet. The first holding rib 12c is close to the inner wall of the cavity 12a. The first holding rib 12c extends along the first flow guiding direction F1, and defines the inner wall of the cavity 12a and the water holding path k in a direction intersecting the first flow guiding direction F1 of the cavity 12a. It is also possible that the working medium inlet i communicates with the water holding path k. The first holding rib 12c extends along a direction intersecting the first flow guiding direction F1 (i.e., the second direction F3), and defines the inner wall of the cavity 12a in the first flow guiding direction F1 of the cavity 12a (as can be understood, this inner wall is the first inner wall a1) and the water holding path k. The arrangement position of the working medium inlet i is not limited, as long as it can communicate with the water holding path k. The number of working medium inlets i communicating with the water holding path k may be one or more.

[0101] The first fluid passage portion c1 may be a gap or a hole structure formed in the first holding rib 12c, or may be a fluid passage space formed with a gap between the water holding path k and the inner wall of the cavity 12a located in its own extending direction, and is not specifically limited. The communication of the first fluid passage portion c1 with the inlet end i1 may mean that the first fluid passage portion c1 is provided at an end portion close to the inlet end i1 of each flow path s of the first holding rib 12c, shortening the distance for the heat exchange working medium to flow from the water holding path k to each inlet end i1 and making the flow division more uniform.

[0102] The first fluid passage portion c1 can guide the heat exchange working medium into the flow path s adjacent to the water holding path k. After entering the adjacent flow path s, the heat exchange working medium can enter each flow path s through the communication between the inlet ends i1 of the flow path s.

[0103] In the embodiment shown in FIG. 6, all the flow paths s are communicating flow paths s2. In this case, when the first fluid passage portion c1 communicates with the inlet end i1 of the adjacent flow path s, it also communicates with the inlet ends i1 of the other flow paths s, and the heat exchange working medium flowing out from the first fluid passage portion c1 can enter each flow path s via the inlet end i1 of each flow path s. In other embodiments, the flow path s adjacent to the water retaining path k may be a closed flow path s1. In this case, the closed flow path s1 is provided with a heat exchange working medium by the first fluid passage portion c1. For the other closed flow paths s1, the heat exchange working medium can be provided via the working medium inlets i arranged in other ways.

[0104] In this case, the water retaining path k is formed by the first retaining rib 12c, and then the first fluid passage portion c1 formed in the first retaining rib 12c provides a heat exchange working medium to the flow path s, and the arrangement of the working medium inlet i is flexible.

[0105] In some embodiments, referring to FIGS. 6 and 8, the bottom plate 12 further includes a second retaining rib 12d. The second retaining rib 12d and the inner wall of the cavity 12a define a water outlet path w. A second fluid passage portion d1 is formed in the second retaining rib 12d. The second fluid passage portion d1 communicates the water outlet path w with the outlet end u1 of the flow path s adjacent to the water outlet path w, and the water outlet path w communicates with the working medium outlet u.

[0106] The second retaining rib 12d may extend substantially along the first flow guiding direction F1 and define the inner wall (i.e., the second direction F3) intersecting the first flow guiding direction F1 of the cavity 12a and the water outlet path w. The second retaining rib 12d may extend substantially along the direction intersecting the first flow guiding direction F1 and define the inner wall (this inner wall is the second inner wall a2) located in the first flow guiding direction F1 of the cavity 12a and the water outlet path w. The number of the working medium outlets u communicating with the water outlet path w may be one or more.

[0107] The water outlet passage w communicates with the working medium outlet u and, via the second fluid passage portion d1, communicates with the outlet ends u1 of all the flow passages s. The second fluid passage portion d1 may be a gap or a hole structure formed in the second holding rib 12d, or may be a fluid passage space formed with a gap between the end portion of the second holding rib 12d close to the outlet end u1 of each flow passage s and the inner wall in the first flow guiding direction F1 of the cavity 12a.

[0108] In this case, the water outlet passage w is communicated with all the outlet ends u1 via the second fluid passage portion d1, the working medium outlet u communicates with the water outlet passage w, and the arrangement of the working medium outlet u is flexible.

[0109] FIG. 9 shows a schematic external view of the bottom plate 12 in some embodiments of the present application.

[0110] In some embodiments, one working medium inlet i and one working medium outlet u are both arranged, and the working medium inlet i communicates with the inlet ends i1 of all the flow passages s, and the working medium outlet u communicates with the outlet ends u1 of all the flow passages s. The working medium inlet i and the working medium outlet u are located on the same side of the bottom plate 12.

[0111] The working medium inlet i and the working medium outlet u may be located on the same side in the first flow guiding direction F1 of the bottom plate 12, or may be located on the same side in the second direction F3 of the bottom plate 12, without limitation.

[0112] In this case, by arranging one working medium inlet i and one working medium outlet u, the circulation of the heat exchange working medium in the bottom plate 12 can be realized, and the cost can be reduced. Further, since the working medium inlet i and the working medium outlet u are located on the same side of the bottom plate 12, it is easier to attach the pipelines communicating with the heat exchange working medium to the working medium inlet i and the working medium outlet u, and it is easier to arrange the pipelines, and the occupied space in the first flow guiding direction F1 of the bottom plate 12 can also be reduced, and the structure of the bottom plate 12 becomes more compact.

[0113] In order to realize that the working medium inlet i and the working medium outlet u are located on the same side of the bottom plate 12, in a specific embodiment, as shown in FIG. 6, the first holding rib 12c and the second holding rib 12d are both arranged along the first flow guiding direction F1, and the working medium inlet i and the working medium outlet u are located on the same side of the bottom plate 12 in the first flow guiding direction F1.

[0114] The first holding rib 12c and the second holding rib 12d are both arranged along the first flow guiding direction F1, that is, the water holding channel k and the water outlet channel w both extend along the first flow guiding direction F1. When the working medium inlet i and the working medium outlet u are on the side where the inlet end i1 of the flow channel s is located, the water outlet channel w guides the flow of the heat exchange working medium along the second flow guiding direction F2 parallel to the first flow guiding direction F1, and the first fluid passing portion c1 in the first holding rib 12c is arranged at the end close to its inlet end i1 and close to the working medium inlet i (for example, the embodiment shown in FIG. 6). When the working medium inlet i and the working medium outlet u are on the side where the outlet end u1 of the flow channel s is located, the water holding channel k guides the flow of the heat exchange working medium along the second flow guiding direction F2, the first fluid passing portion c1 in the first holding rib 12c is arranged at the end close to its inlet end i1, the second fluid passing portion d1 of the second holding rib 12d is arranged at the end close to the outlet end u1, and is close to the working medium outlet u.

[0115] In another specific embodiment (not shown), one of the first holding rib 12c and the second holding rib 12d extends along the first flow guiding direction F1, and the other extends along a direction intersecting the first flow guiding direction F1 (that is, the second direction F3). The first fluid passing portion c1 of the first holding rib 12c is arranged at the end where the inlet end i1 of the flow channel s is located, and the second fluid passing portion c2 of the second holding rib 12d is arranged at the end where the outlet end u1 of the flow channel s is located. In this way, it is also possible to realize that the working medium inlet i and the working medium outlet u are located on the same side of the bottom plate 12.

[0116] Of course, the technical solutions for realizing that the working medium inlet i and the working medium outlet u are located on the same side of the bottom plate 12 are not limited to the above technical solutions. For example, only the second holding rib 12d may be provided, and the heat exchange working medium at the outlet end u1 of each flow path s may be guided to one side of the bottom plate 12 where the working medium inlet i is located.

[0117] In some embodiments, referring to FIG. 3, a working medium general inlet I and a working medium general outlet U are provided on the side plate 11. The working medium inlet i communicates with the working medium general inlet I, and the working medium outlet u communicates with the working medium general outlet U.

[0118] The working medium general inlet I is used for communicating with a heat exchange working medium providing device, and the working medium general outlet U is used for communicating with a heat exchange working medium recovering device. The working medium inlet i can communicate with the working medium general inlet I through a pipeline, and the working medium outlet u can communicate with the working medium general outlet U through a pipeline. In this case, since the working medium general inlet I and the working medium general outlet U are provided on the side plate 11 and the space of the side plate 11 is sufficient, it is easier to provide the working medium general inlet I and the working medium general outlet U.

[0119] In some embodiments, a space for communicating the working medium inlet i and the working medium general inlet I is configured inside the side plate 11, and / or a space for communicating the working medium outlet u and the working medium general outlet U is configured inside the side plate 11.

[0120] That is, the heat exchange working medium flowing out from the working medium general inlet I enters the bottom plate 12 after flowing through the internal space of the side plate 11, and / or the heat exchange working medium flowing out from the working medium outlet u of the bottom plate 12 returns to the working medium general outlet U after flowing through the space of the side plate 11.

[0121] Specifically, a space through which the heat exchange working medium flows can be configured in a part of the inside of the side plate 11. For example, when four side plates 11 surround to form a square structure, a space through which the heat exchange working medium flows can be provided in one or two or three or all of the side plates 11.

[0122] When the heat exchange working medium flows through the space inside the side plate 11, the side plate 11 can be used to cool the side portions of the battery cell 20 to lower the temperature, thereby enhancing the heat exchange effect on the battery cell 20 and also increasing the energy utilization rate of the cooling liquid.

[0123] In one embodiment of the present application, the battery box 10 includes a side plate 11 and a bottom plate 12. The side plate 11 is provided on the bottom plate 12 surrounding the outer edge of the bottom plate 12. The bottom plate 12 has a cavity 12a, a working medium inlet i, and a working medium outlet u. An isolation member 12b is provided in the cavity 12a. The isolation member 12b isolates the cavity 12a to form at least two flow paths s for guiding the flow along the first flow guiding direction F1. Each flow path s has an inlet end i1 and an outlet end u1 provided so as to face away from each other in the first flow guiding direction F1. The working medium inlet i communicates with all the inlet ends i1, the working medium outlet u communicates with all the outlet ends u1, and the outlet ends u1 of each flow path s communicate with each other. A working medium comprehensive inlet I and a working medium comprehensive outlet U are provided on the side plate 11, and a space for communicating the working medium comprehensive inlet I with the working medium inlet i is formed inside the side plate 11, and / or a space for communicating the working medium comprehensive outlet U with the working medium outlet u is formed inside the side plate 11.

[0124] In a second aspect, the embodiment of the present application further provides a battery 100 including the battery box 10 in any one of the above embodiments and a battery cell 20 accommodated in the battery box 10. The battery 100 includes all the above beneficial effects and will not be described in detail here.

[0125] FIG. 10 shows a partial structural schematic diagram of the battery 100 in some embodiments of the present application.

[0126] In some embodiments, referring to FIG. 10, the battery 100 further includes a heat management member 13. The heat management member 13 is located in the space formed by surrounding the side plate 11 and the bottom plate 12 and is provided on the side plate 11. The heat management member 13 is in surface contact with at least one battery cell 20 and has a flow space through which the heat exchange working medium flows.

[0127] The heat management member 13 is a member that performs temperature management on the battery cells 20 inside the battery 100, and can realize functions such as cooling, heating, and / or temperature balance. The specific form of the heat management member 13 is not limited, and the normal arrangement of heat management of batteries in this field can be selected and used. For example, the heat management member 13 can include a temperature detection element, an air cooling assembly (or a liquid cooling assembly), a heating assembly, etc. The temperature detection element detects the internal temperature of the battery box 10, and based on this, controls the operation of the air cooling assembly (or the liquid cooling assembly) or the heating assembly (the operation parameters of the air cooling assembly, the liquid cooling assembly, or the heating assembly can be changed) to adjust the temperature, so as to maintain the balance of the operating temperature of the battery cells 20.

[0128] The heat management member 13 can be in a long shape, is located in the space formed by surrounding the side plates 11 and the bottom plate 12, and both ends thereof are connected to the side plates 11. Specifically, the heat management member 13 can extend along the first flow guiding direction F1 and be connected to the side plates 11 on both sides. The fixing means between the heat management member 13 and the side plates 11 may be a clamp, screw connection, adhesion, welding, etc.

[0129] In the flow space inside the heat management member 13, a heat exchange working medium can flow. The space for accommodating the battery cells 20 is formed by the heat management member 13 and the side plates 11. When the battery cells 20 are rectangular, the outer surface extending along the first flow guiding direction F1 of the battery cells 20 contacts the heat management member 13.

[0130] In this case, arranging the heat management member 13 in the battery box 10 can not only reinforce the structure of the battery box 10, but also increase the heat exchange between the heat exchange working medium and the battery cell 20 located at the central position among the heat exchange working medium and the battery cells 20 when the heat exchange working medium flows inside, and improve the heat exchange efficiency of the battery cells 20.

[0131] Specifically, the heat management member 13 can include a battery thermal management system (Battery Management System (BMS)) with a conventional structure and a flow distribution plate provided for battery thermal management. The battery management system extends along the first flow guiding direction F1 and is provided on the side plate 11. The flow distribution plate is provided on at least one side intersecting the first flow guiding direction F1 of the battery management system. The flow distribution plate has the above-mentioned flow space and is in surface contact with the battery cell 20.

[0132] In some embodiments, the bottom plate 12 includes a working medium inlet i and a working medium outlet u. A working medium general inlet I and a working medium general outlet U are provided on the side plate 11. The working medium inlet i and the working medium general inlet I communicate with each other through the flow space, and / or the working medium outlet u and the working medium general outlet U communicate with each other through the flow space.

[0133] In this case, the heat exchange working medium flowing in the flow space and the heat exchange working medium flowing through the bottom plate 12 belong to the flow of the same heat exchange working medium. This not only extends the flow path of the heat exchange working medium and improves the energy utilization rate of the heat exchange working medium, but also simplifies the structure of the battery 100 and can reduce costs.

[0134] In a third aspect, the embodiments of the present application further provide an electrical device including the above-mentioned battery 100 for providing electrical energy.

[0135] Each of the technical features of the above-described embodiments can be arbitrarily combined. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, these combinations of technical features should be considered to be within the scope described in this specification as long as they do not conflict.

[0136] The embodiments described above represent only some embodiments of the present application. Although the description is specific and detailed, it should not be construed as a limitation to the scope of the claims. It should be noted that those skilled in the art may make various modifications and improvements without departing from the idea of the present application, and all of these belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application is based on the following scope of the claims.

Explanation of Reference Numerals

[0137] 1000 Vehicle 100 Battery 200 Controller 300 Motor 10 Battery Box 11 Side Plate I Total Inlet of Working Medium U Total Outlet of Working Medium 12 Bottom Plate 12a Cavity a1 First Inner Wall a2 Second Inner Wall i Inlet of Working Medium u Outlet of Working Medium 12b Isolation Member s Flow Path i1 Inlet End u1 Outlet End s1 Closed Flow Path s2 Communicating Flow Path b1 First Isolation Member b11 Guide Portion b2 Second Isolation Member 12c First Holding Rib k Water Retaining Path c1 First Fluid Passing Portion 12d Second Holding Rib w Water Outlet Path d1 Second Fluid Passing Portion 14 Connection Pipeline F1 First Flow Guide Direction F2 Second Flow Guide Direction F3 Second Direction 20 Battery Cell 21 End Cap 22 Case 23-cell assembly 30 thermal management member

Claims

1. A battery box (10) including a side plate (11) and a bottom plate (12), wherein the side plate (11) is provided on the bottom plate (12) surrounding the outer edge of the bottom plate (12). The bottom plate (12) has a cavity (12a), and a partition member (12b) is provided in the cavity (12a). The partition member (12b) forms at least two flow paths (s) that isolate the cavity (12a) and guide the flow along the first flow guiding direction (F1). A battery box (10).

2. The partition member (12b) includes a first partition member (b1). An end portion of the first partition member (b1) close to the inlet end (i1) of the flow path (s) communicates the two adjacent flow paths (s) with each other. The battery box (10) according to claim 1, characterized in that.

3. In the first flow guiding direction (F1), an end portion of each first partition member (b1) close to the inlet end (i1) is provided at a distance from the inner wall of the cavity (12a). The battery box (10) according to claim 2, characterized in that.

4. The partition member (12b) includes a second partition member (b2). In the first flow guiding direction (F1), an end portion of the second partition member (b2) close to the inlet end (i1) of the flow path (s) cooperates with the inner wall of the cavity (12a) to prevent the heat exchange working medium from flowing between the two adjacent flow paths (s). The battery box (10) according to any one of claims 1 to 3, characterized in that.

5. In the first flow guiding direction (F1), an end portion of the second partition member (b2) close to the inlet end (i1) of the flow path (s) is connected to the inner wall of the cavity (12a). The battery box (10) according to claim 4, characterized in that.

6. In the first flow guiding direction (F1), an end portion of at least one partition member (12b) close to the outlet end (u1) of the flow path (s) is configured to communicate the adjacent flow paths (s). The battery box (10) according to any one of claims 1 to 5, characterized in that.

7. An end portion of at least one partition member (12b) close to the outlet end (u1) of the flow path (s) is provided at a distance from the inner wall of the cavity (12a). The battery box (10) according to claim 6, characterized in that.

8. The bottom plate (12) includes at least one working medium inlet (i) and at least one working medium outlet (u), each of the flow paths (s) has an inlet end (i1) and an outlet end (u1) provided so as to face away in the first flow guiding direction (F1), and the working medium inlet (i) communicates with any of the inlet ends (i1), and the battery box (10) according to any one of claims 1 to 7, characterized in that the working medium outlet (u) communicates with any of the outlet ends (u1).

9. The battery box (10) according to claim 8, characterized in that the outlet ends (u1) of the flow paths (s) communicate with each other.

10. The working medium inlet (i) and the working medium outlet (u) are located on opposite sides of the bottom plate (12) in the first flow guiding direction (F1), the working medium inlet (i) is provided near the inlet end (i1) of the flow path (s), and the working medium outlet (u) is provided near the outlet end (u1) of the flow path (s). The battery box (10) according to claim 8 or 9, characterized in that it is provided.

11. The bottom plate (12) further includes a first holding rib (12c), and a water holding path (k) is defined by the first holding rib (12c) and the inner wall of the cavity (12a), and the water holding path (k) communicates with the working medium inlet (i), a first fluid passage portion (c1) is formed in the first holding rib (12c), and the first fluid passage portion (c1) communicates the water holding path (k) with the inlet end (i1) of the flow path (s) adjacent thereto. The battery box (10) according to any one of claims 8 to 10, characterized in that it is made to communicate.

12. The bottom plate (12) further includes a second holding rib (12d), and a water outlet path (w) is defined by the second holding rib (12d) and the inner wall of the cavity (12a), a second fluid passage portion (d1) is formed in the second holding rib (12d), the second fluid passage portion (d1) communicates the water outlet path (w) with the outlet end (u1) of the flow path (s) adjacent thereto, and the water outlet path (w) communicates with the working medium outlet (u). The battery box (10) according to any one of claims 8 to 11, characterized in that it is made to communicate.

13. The working medium inlet (i) and the working medium outlet (u) are both arranged singly. The working medium inlet (i) communicates with the inlet ends (i1) of all the flow paths (s), and the working medium outlet (u) communicates with the outlet ends (u1) of all the flow paths (s). The battery box (10) according to any one of claims 8 to 12, wherein the working medium inlet (i) and the working medium outlet (u) are located on the same side of the bottom plate (12).

14. The battery box (10) according to any one of claims 8 to 13, wherein a working medium general inlet (I) and a working medium general outlet (U) are provided on the side plate (11), the working medium inlet (i) communicates with the working medium general inlet (I), and the working medium outlet (u) communicates with the working medium general outlet (U).

15. The battery box (10) according to claim 14, wherein a space for communicating the working medium inlet (i) and the working medium general inlet (I) is formed inside the side plate (11), and / or a space for communicating the working medium outlet (u) and the working medium general outlet (U) is formed inside the side plate (11).

16. A battery comprising the battery box (10) according to any one of claims 1 to 15, a battery cell (20) housed in the battery box (10).

17. The battery (100) further includes a heat management member (30). The heat management member (30) is located in the space formed by surrounding the side plate (11) and the bottom plate (12), and is provided on the side plate (11). The battery according to claim 16, wherein the heat management member (30) is in surface contact with at least one of the battery cells (20) and has a flow space through which a heat exchange working medium flows.

18. The bottom plate (12) includes a working medium inlet (i) and a working medium outlet (u), and a working medium general inlet (I) and a working medium general outlet (U) are provided on the side plate (11). The battery according to claim 17, wherein the working medium inlet (i) and the working medium general inlet (I) communicate with each other through the flow space, and / or the working medium outlet (u) and the working medium general outlet (U) communicate with each other through the flow space.

19. An electrical device including the battery (100) according to any one of claims 16 to 18 for providing electrical energy.

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