Heat exchange assembly, battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a heat exchange assembly, a battery and electric equipment. The heat exchange assembly comprises a plurality of heat exchange units and connecting joints, the heat exchange units are arranged at intervals in the first direction, the heat exchange units are configured to be arranged in one-to-one correspondence with multiple columns of single batteries and can exchange heat, the connecting joints at least comprise first connecting pieces, and the first connecting pieces are configured to be electric insulating pieces; every two adjacent heat exchange units are connected through a first connecting piece. Wherein the first direction is one of the length direction and the width direction of the battery. According to the heat exchange assembly provided by the invention, when one column of battery monomers in the plurality of columns of battery monomers is subjected to insulation failure, the heat exchange unit corresponding to the column of battery monomers subjected to insulation failure cannot be electrically connected with other heat exchange units; therefore, the phenomenon that the battery monomer with insulation failure is electrically connected with other battery monomers through the heat exchange unit is reduced.

Description

Technical Field

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

[0002] To meet the rapid development of new energy vehicles, the number of battery cells or battery modules in the battery has increased. While the power is increasing, the thermal coupling between battery cells or battery modules will become more and more serious. When the temperature in the battery is too high or too low, the battery may experience thermal runaway, severe life reduction, and charging and discharging restrictions. Therefore, a heat exchange component is generally provided in the battery to exchange heat with the battery cell or battery module, thereby adjusting the temperature of the battery cell or battery module.

[0003] The core components of existing heat exchange components are heat exchange components such as heat exchange plates or heat exchange tubes that are in direct contact with battery cells or battery modules. Heat exchange components are generally made of one-piece metal and have a certain length. When in use, the same heat exchange component often contacts multiple battery cells or battery modules at the same time. When the insulation of a single battery cell or a single battery module fails, it will be electrically connected to other battery cells or battery modules through the heat exchange component, causing an overall short circuit in the battery. Utility Model Content

[0004] In view of the defects of the prior art, the purpose of the present application is to provide a heat exchange component, a battery and an electrical device, which can effectively solve the problem of electrical connection with other battery cells or battery modules through heat exchange components when the insulation of a single battery cell or a single battery module fails.

[0005] The first aspect of the present application discloses a heat exchange assembly for a battery, wherein the battery comprises a plurality of rows of battery cells, and the plurality of rows of battery cells are arranged at intervals along a first direction, wherein the heat exchange assembly comprises:

[0006] A plurality of heat exchange units, the plurality of heat exchange units are arranged at intervals along a first direction, and the plurality of heat exchange units are configured to correspond to the plurality of columns of battery cells one by one and to enable heat exchange;

[0007] A connecting joint, the connecting joint at least comprises a first connecting member, the first connecting member is configured as an electrical insulating member, and two adjacent heat exchange units are connected via the first connecting member;

[0008] The first direction is one of a length direction and a width direction of the battery.

[0009] According to the heat exchange assembly of the present application, the multiple heat exchange units in the heat exchange assembly are configured to correspond one-to-one to the multiple columns of battery cells and can exchange heat, so that the temperature of the multiple columns of battery cells can be effectively controlled. Since two adjacent heat exchange units are connected by a first connecting member, and the first connecting member is configured as an electrical insulating member, the two adjacent heat exchange units cannot be conductively connected. When the insulation of one of the multiple columns of battery cells fails, the heat exchange unit corresponding to the column of battery cells with the insulation failure cannot be electrically connected to other heat exchange units, thereby reducing the phenomenon of the battery cells with insulation failure being electrically connected to other battery cells through the heat exchange unit.

[0010] In some embodiments of the present application, the heat exchange unit includes a first collector, a second collector and at least one heat exchange element, the first collector and the second collector extend respectively along the first direction and are spaced apart along the second direction, at least one heat exchange element is arranged between the first collector and the second collector, and a heat exchange channel connecting the first collector and the second collector is provided inside the at least one heat exchange element, wherein the second direction is the other of the length direction and the width direction of the battery.

[0011] A heat exchange channel is provided in the heat exchange unit through a cover, and the first collector and the second collector are respectively connected to the heat exchange channel, so that heat exchange medium is input and output into the heat exchange channel, thereby adjusting the temperature of the heat exchange element, and heat exchange between the heat exchange element and the battery cell is performed to adjust the temperature of the battery cell.

[0012] In some embodiments of the present application, at least one heat exchange element includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes extend along the second direction and are arranged at intervals along the first direction. A heat exchange channel connecting the first collecting pipe and the second collecting pipe is provided inside any heat exchange tube, and the plurality of heat exchange tubes are configured to correspond to the same column of battery cells and to be capable of heat exchange.

[0013] By providing a plurality of heat exchange tubes, and configuring the plurality of heat exchange tubes to correspond to the same column of battery cells and to be capable of heat exchange, the plurality of heat exchange tubes can simultaneously exchange heat with the battery cells, thereby improving the heat exchange efficiency between the heat exchange unit and the battery cells, and the number of heat exchange tubes in the same heat exchange component and the spacing between the heat exchange tubes can be reasonably controlled according to installation requirements, thereby facilitating the installation of the heat exchange unit.

[0014] In some embodiments of the present application, the flow directions in adjacent heat exchange channels in the same heat exchange unit are arranged to be the same or opposite.

[0015] By setting the flow directions in the heat exchange channels to be the same or opposite, the flow direction of the heat exchange medium in the heat exchange unit is adjusted, thereby adjusting the heat exchange efficiency between the heat exchange unit and the battery cell.

[0016] In some embodiments of the present application, the heat exchange component further includes a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are jointly arranged on the same side of the heat exchange component along the second direction, or the liquid inlet and the liquid outlet are respectively arranged on both sides of the heat exchange component along the second direction.

[0017] According to the requirements of installation and use, the liquid inlet and the liquid outlet can be jointly arranged on the same side of the heat exchange component along the second direction, that is, the liquid inlet and the liquid outlet can be jointly arranged on one of the first collecting pipe and the second collecting pipe, or the liquid inlet and the liquid outlet can be respectively arranged on both sides of the heat exchange component along the second direction, that is, the liquid inlet is arranged on one of the first collecting pipe and the second collecting pipe, and the liquid outlet is arranged on the other of the first collecting pipe and the second collecting pipe.

[0018] In some embodiments of the present application, the flow directions in the heat exchange channels of two adjacent heat exchange units are arranged to be the same and / or opposite.

[0019] By setting the flow directions in two adjacent heat exchange channels to be the same and / or opposite, the flow direction of the heat exchange medium in the heat exchange assembly is adjusted, thereby adjusting the heat exchange efficiency between the heat exchange assembly and the battery cell.

[0020] In some embodiments of the present application, a guide channel is provided inside the first connecting member, and the heat exchange channels in two adjacent heat exchange units are connected through the guide channel.

[0021] By setting a guide channel inside the first connecting member, the heat exchange channels in two adjacent heat exchange units are connected through the guide channel, so that the heat exchange medium can flow through multiple heat exchange units in sequence, thereby improving the utilization rate of the heat exchange medium and reducing the setting of connecting pipelines.

[0022] In some embodiments of the present application, two connecting joints are provided between two adjacent heat exchange units, the first collecting pipes of the two adjacent heat exchange units are connected through one of the connecting joints, the second collecting pipes of the two adjacent heat exchange units are connected through the other connecting joint, and the heat exchange channels of the two adjacent heat exchange units are connected through at least one connecting joint.

[0023] By providing two connecting joints between two adjacent heat exchange units, the two connecting joints are respectively used to connect the two adjacent heat exchange units, thereby improving the connection strength between the two adjacent heat exchange units, thereby improving the overall connection strength of the heat exchange assembly.

[0024] In some embodiments of the present application, the flow area of ​​the first collecting pipe in the same heat exchange unit gradually increases along the direction from the liquid inlet toward the liquid outlet, and / or the flow area of ​​the second collecting pipe in the same heat exchange unit gradually increases along the direction from the liquid inlet toward the liquid outlet.

[0025] By gradually increasing the flow area of ​​the first collecting pipe in the same heat exchange unit, the resistance encountered by the heat exchange medium in the first collecting pipe in the same heat exchange unit during flow can be reduced, thereby improving the heat exchange efficiency of the heat exchange medium in the heat exchange unit; by gradually increasing the flow area of ​​the second collecting pipe in the same heat exchange unit, the resistance encountered by the heat exchange medium in the second collecting pipe in the same heat exchange unit during flow can be reduced, thereby improving the heat exchange efficiency of the heat exchange medium in the heat exchange unit.

[0026] In some embodiments of the present application, the flow areas of the first collecting pipes in the multiple heat exchange units gradually increase along the direction from the liquid inlet toward the liquid outlet, and / or, the flow areas of the second collecting pipes in the multiple heat exchange units gradually increase along the direction from the liquid inlet toward the liquid outlet.

[0027] By gradually increasing the flow areas of the first collecting pipes in multiple heat exchange units in sequence, the resistance encountered by the heat exchange medium in the multiple first collecting pipes of the heat exchange component during flow can be reduced, thereby improving the heat exchange efficiency of the heat exchange medium in the heat exchange component; by gradually increasing the flow areas of the second collecting pipes in multiple heat exchange units in sequence, the resistance encountered by the heat exchange medium in the multiple second collecting pipes of the heat exchange component during flow can be reduced, thereby improving the heat exchange efficiency of the heat exchange medium in the heat exchange component.

[0028] In some embodiments of the present application, the connecting joint further includes a second connecting member, and the second connecting member is sleeved on the outside of the first connecting member.

[0029] The second connecting piece is sleeved on the outside of the first connecting piece and can be used to improve the supporting strength of the connecting joint, thereby facilitating the fixed connection of the connecting joint to the heat exchange unit.

[0030] A second aspect of the present application discloses a battery, the battery comprising any one of the above heat exchange components, and the battery further comprising:

[0031] A box body, wherein a receiving cavity is formed inside the box body;

[0032] A plurality of rows of battery cells, wherein the plurality of rows of battery cells are arranged in the accommodation cavity at intervals along a first direction;

[0033] The plurality of heat exchange units in the heat exchange assembly are configured to correspond one to one with the plurality of rows of battery cells and to be capable of heat exchange.

[0034] By configuring the multiple heat exchange units in the heat exchange assembly to correspond one-to-one to the multiple columns of battery cells and to be able to exchange heat, the temperature of the multiple columns of battery cells can be effectively controlled. Since two adjacent heat exchange units are connected by a first connecting member, and the first connecting member is configured as an electrical insulating member, there is no conductive connection between the two adjacent heat exchange units. When the insulation of one of the multiple columns of battery cells fails, the heat exchange unit corresponding to the column of battery cells with the insulation failure cannot be electrically connected to other heat exchange units, thereby reducing the phenomenon of the battery cells with insulation failure being electrically connected to other battery cells through the heat exchange units.

[0035] In some embodiments of the present application, the battery cell is provided with a pressure relief mechanism, which is arranged on the surface of the battery cell facing the heat exchange component. The heat exchange unit includes a plurality of heat exchange tubes, which extend along the second direction and are arranged at intervals along the first direction. The pressure relief mechanism is arranged corresponding to the interval space between two adjacent heat exchange tubes, wherein the second direction is the other of the length direction and the width direction of the battery.

[0036] When a battery cell goes into thermal runaway, it will release a large amount of high-temperature and high-pressure gas. The pressure relief mechanism can be in an open state to discharge the gas from the battery cell, thereby reducing further damage to the battery cell. By setting the pressure relief mechanism in correspondence with the spacing between two adjacent heat exchange tubes, the spacing between two adjacent heat exchange tubes forms an exhaust channel for the pressure relief mechanism, reducing the obstruction of the gas flowing out through the pressure relief mechanism, improving the exhaust efficiency of the pressure relief mechanism, and at the same time reducing the impact of the gas flowing out through the pressure relief mechanism on the heat exchange component, reducing the damage to the heat exchange component under the impact of high-speed airflow.

[0037] The third aspect of the present application proposes an electrical device, which includes any one of the above batteries, and the battery is used to provide electrical energy.

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

[0040] Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0041] Figure 2 is a schematic structural diagram of a battery pack provided in one embodiment of the present application;

[0042] Figure 3 is a schematic structural diagram of a battery module provided in one embodiment of the present application;

[0043] Figure 4 is a schematic diagram of the exploded structure of a battery cell provided in one embodiment of the present application;

[0044] Figure 5 This is a schematic diagram of the connection structure between the battery module and the heat exchange component provided in one embodiment of the present application;

[0045] Figure 6 yes Figure 5 A top view of the battery module and heat exchange assembly;

[0046] Figure 7 yes Figure 5 Bottom view of the middle battery module and heat exchange assembly;

[0047] Figure 8 yes Figure 5 A schematic diagram of the structure of the heat exchange component;

[0048] Fig. 9 yes Figure 8 A schematic structural diagram of the first heat exchange unit;

[0049] Fig.10 is a schematic structural diagram of a heat exchange assembly provided in another embodiment of the present application;

[0050] Fig.11 is a schematic structural diagram of a heat exchange assembly provided in another embodiment of the present application;

[0051] Fig.12 yes Figure 8 A schematic diagram of the structure of the connecting joint;

[0052] Fig.13 yes Fig.12 AA cross-sectional structure schematic diagram of the middle connection joint;

[0053] Fig.14 is a schematic structural diagram of a heat exchange assembly provided in another embodiment of the present application;

[0054] Fig.15 It is a schematic structural diagram of a heat exchange component provided in another embodiment of the present application.

[0055] The reference numerals in the specific implementation manner are as follows:

[0056] 1. Vehicles;

[0057] 10. Battery; 11. Controller; 12. Motor;

[0058] 20. Battery module; 21. Battery cell; 211. End cover; 212. Housing; 213. Electrode assembly; 214. Electrode terminal; 215. Pressure relief mechanism;

[0059] 30. Box body; 301. First part; 302. Second part;

[0060] 40. Heat exchange assembly; 41. First heat exchange unit; 411. First header; 412. Second header; 413. First heat exchange tube; 414. Second heat exchange tube; 415. Liquid inlet; 416. Liquid outlet; 42. Second heat exchange unit; 43. Third heat exchange unit; 44. Fourth heat exchange unit; 45. Connecting joint; 451. First connecting piece; 4511. Guide channel; 452. Second connecting piece; 4521. Protrusion. DETAILED DESCRIPTION

[0061] The following detailed description of the implementation of the technical solution of the present application is provided in conjunction with the accompanying drawings. The following implementation is only used to more clearly illustrate the technical solution of the present application, and is therefore only used as an example, and cannot be used to limit the scope of protection of the present application.

[0062] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0063] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0064] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0065] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0066] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields.

[0068] The battery is generally provided with a heat exchange component for heat exchange with the battery cell or battery module, thereby regulating the temperature of the battery cell or battery module. The core components of the existing heat exchange components are heat exchange components such as heat exchange plates or heat exchange tubes that are in direct contact with the battery cell or battery module. The heat exchange components are generally one-piece metal materials and have a certain length. When in use, the same heat exchange component often contacts multiple battery cells or battery modules at the same time. When the insulation of a single battery cell or a single battery module fails, it will be electrically connected to other battery cells or battery modules through the heat exchange component, causing an overall short circuit of the battery.

[0069] In order to solve the problem of electrical connection with other battery cells or battery modules through heat exchange components when the insulation of a single battery cell or a single battery module fails, the present application proposes a heat exchange component, a battery including the heat exchange component, and an electrical device including the battery, the heat exchange component including a plurality of heat exchange units arranged at intervals along a first direction, the plurality of heat exchange units being configured to correspond one-to-one with a plurality of columns of battery cells and capable of heat exchange, the plurality of heat exchange units being capable of effectively controlling the temperature of the plurality of columns of battery cells, two adjacent heat exchange units being connected by a first connecting member, and the first connecting member being configured as an electrical insulating member, so that two adjacent heat exchange units cannot be conductively connected, and when the insulation of one of the plurality of columns of battery cells fails, the heat exchange unit corresponding to the column of battery cells having the insulation failure cannot be electrically connected to the other heat exchange units, thereby reducing the phenomenon of the battery cells with the insulation failure being electrically connected to the other battery cells through the heat exchange units.

[0070] The present application provides a heat exchange component, a battery including the heat exchange component, and an electric device including the battery. The battery in the present application is applicable to various electric devices using batteries, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; the battery is used to provide electric energy for the above-mentioned electric devices.

[0071] 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 heat exchange components and electrical equipment using batteries. However, for the sake of simplicity, the following embodiments are explained using vehicles as examples.

[0072] Figure 1 This is a schematic diagram of the structure of a vehicle 1 provided in some embodiments of the present application. Figure 1 As shown, the vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 10 is arranged inside the vehicle 1, and the battery 10 can be arranged at the bottom, head or tail of the vehicle 1. The battery 10 can be used to power the vehicle 1, for example, the battery 10 can be used as an operating power source for the vehicle 1. The vehicle 1 can also include a controller 11 and a motor 12, and the controller 11 is used to control the battery 10 to power the motor 12, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0073] In some embodiments of the present application, the battery 10 can be used not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0074] Figure 2 Schematic diagram of the structure of a battery 10 according to one embodiment of the present application. Figure 3 FIG. 2 is a schematic diagram of the structure of a battery module 20 according to an embodiment of the present application. Figure 2 and Figure 3 As shown, in order to meet different power requirements, the battery 10 may include a plurality of battery cells 21, and the battery cell 21 refers to the smallest unit that constitutes the battery module 20 or the battery pack. A plurality of battery cells 21 can be connected in series and / or in parallel via electrode terminals for use in various applications. The battery mentioned in the present application includes a battery module 20 or a battery pack. Among them, a plurality of battery cells 21 can be connected in series, in parallel, or in mixed connection, and mixed connection refers to a mixture of series and parallel connection. The battery 10 may also be referred to as a battery pack. In the embodiment of the present application, a plurality of battery cells 21 may directly constitute a battery pack, or may first constitute a battery module 20, and the battery module 20 may then constitute a battery pack.

[0075] Combination Figure 2 and Figure 3 As shown, the battery 10 may include a plurality of battery modules 20 and a box 30, wherein the plurality of battery modules 20 are contained inside the box 30. The box 30 is used to contain the battery cells 21 or the battery modules 20 to reduce the influence of liquid or other foreign matter on the charging or discharging of the battery cells 21. The box 30 may be a simple three-dimensional structure such as a single cuboid, cylinder or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders or spheres. The material of the box 30 may be an alloy material such as aluminum alloy, iron alloy, or a polymer material such as polycarbonate, polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin.

[0076] In some embodiments, the box body 30 may include a first portion 301 and a second portion 302, the first portion 301 and the second portion 302 cover each other, and the first portion 301 and the second portion 302 jointly define a space for accommodating the battery cell 21. The second portion 302 may be a hollow structure with one end open, and the first portion 301 may be a plate-like structure, and the first portion 301 covers the open side of the second portion 302, so that the first portion 301 and the second portion 302 jointly define a space for accommodating the battery cell 21; the first portion 301 and the second portion 302 may also be hollow structures with one side open, and the open side of the first portion 301 covers the open side of the second portion 302.

[0077] The battery module 20 may include a plurality of battery cells 21. The plurality of battery cells 21 may be connected in series, in parallel, or in a mixed connection to form a battery module 20, and the plurality of battery modules 20 may be connected in series, in parallel, or in a mixed connection to form a battery 10. The battery cell 21 may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of the present application are not limited thereto. The battery cells 21 are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of the present application are not limited thereto. However, for the sake of simplicity, the following embodiments are all described using square lithium-ion battery cells 21 as an example.

[0078] Figure 4 The schematic diagram of the exploded structure of the battery cell 21 provided in some embodiments of the present application. The battery cell 21 refers to the smallest unit constituting the battery 10. Figure 4 The battery cell 21 includes an end cover 211 , a shell 212 and an electrode assembly 213 .

[0079] The end cap 211 refers to a component that covers the opening of the shell 212 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cap 211 can be adapted to the shape of the shell 212 to match the shell 212. Optionally, the end cap 211 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 211 is not easily deformed when squeezed and collided, so that the battery cell 21 can have a higher structural strength and improved safety performance. Functional components such as electrode terminals 214 can be provided on the end cap 211. The electrode terminal 214 can be used to electrically connect to the electrode assembly 213 for outputting or inputting electrical energy of the battery cell 21. In some embodiments, the end cap 211 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold. In some embodiments, an insulating member may be provided inside the end cap 211, and the insulating member may be used to isolate the electrical connection components in the housing 212 from the end cap 211 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0080] The shell 212 is a component used to cooperate with the end cap 211 to form the internal environment of the battery cell 21, wherein the formed internal environment can be used to accommodate the electrode assembly 213, the electrolyte (not shown in the figure) and other components. The shell 212 and the end cap 211 can be independent components, and an opening can be set on the shell 212, and the internal environment of the battery cell 21 is formed by covering the opening with the end cap 211 at the opening. Without limitation, the end cap 211 and the shell 212 can also be integrated. Specifically, the end cap 211 and the shell 212 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 212, the end cap 211 covers the shell 212. The shell 212 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 212 can be determined according to the specific shape and size of the electrode assembly 213. The material of the shell 212 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0081] The electrode assembly 213 is a component in the battery cell 21 where electrochemical reactions occur. One or more electrode assemblies 213 may be contained in the housing 212. The electrode assembly 213 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 213, and the parts of the positive and negative electrode sheets without active materials each constitute a pole ear (not shown in the figure). The positive pole ear and the negative pole ear may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the pole ear connects the electrode terminal 214 to form a current loop.

[0082] The first aspect of the present application discloses a heat exchange component, Figures 5 to 8 As shown, in some embodiments of the present application, a heat exchange component 40 is used for a battery 10, and the battery 10 includes a plurality of columns of battery cells 21, and the plurality of columns of battery cells 21 are arranged at intervals along a first direction, wherein the heat exchange component 40 includes a plurality of heat exchange units and a connecting joint 45, and the plurality of heat exchange units are arranged at intervals along the first direction, and the plurality of heat exchange units are configured to correspond one to one with the plurality of columns of battery cells 21 and to be capable of heat exchange, and the connecting joint 45 includes at least a first connecting member 451, and the first connecting member 451 is configured as an electrical insulating member, and two adjacent heat exchange units are connected via the first connecting member 451; wherein the first direction is one of the length direction and the width direction of the battery 10.

[0083] In some embodiments of the present application, a column of battery cells 21 may include multiple battery cells 21, and the multiple battery cells 21 are arranged in sequence and conductively connected along the second direction, and the multiple columns of battery cells 21 are arranged at intervals along the first direction. The second direction is the other of the length direction and the width direction of the battery 10. Alternatively, in some embodiments of the present application, a column of battery cells 21 may include only one battery cell 21, and the multiple battery cells 21 are arranged at intervals along the first direction. Multiple heat exchange units are respectively arranged one by one with multiple columns of battery cells 21, and the battery cells 21 in the same column of battery cells 21 can be respectively attached to the heat exchange units and perform heat exchange, so that the temperature of the battery cells 21 is adjusted by the heat exchange units. The first connector 451 is used to connect two adjacent heat exchange units, so that the multiple heat exchange units are assembled into a heat exchange assembly 40, and the multiple columns of battery cells 21 are heat exchanged together by the multiple heat exchange units.

[0084] In some embodiments of the present application, a heat exchange channel may be provided inside the heat exchange unit, and a heat exchange medium may be provided inside the heat exchange channel. The heat release or heat absorption of the heat exchange medium increases or decreases the temperature of the heat exchange unit, and then the heat exchange of the battery cell 21 is performed through the heat exchange unit. The heat exchange channels between adjacent heat exchange units may be interconnected or disconnected, and multiple heat exchange units are connected to form a heat exchange assembly 40 through a connecting joint 45. In some embodiments of the present application, a heat exchange medium may not be provided inside the heat exchange unit, and the temperature of the heat exchange unit may be directly controlled and adjusted, such as a semiconductor heat exchange unit, and multiple heat exchange units are connected to form a heat exchange assembly 40 through a connecting joint 45.

[0085] In some embodiments of the present application, the plurality of heat exchange units include a first heat exchange unit 41, a second heat exchange unit 42, a third heat exchange unit 43, and a fourth heat exchange unit 44 sequentially arranged along a first direction, and the structures of the first heat exchange unit 41, the second heat exchange unit 42, the third heat exchange unit 43, and the fourth heat exchange unit 44 may be consistent with each other or inconsistent with each other. For the convenience of description, in some embodiments of the present application, only the structures of the first heat exchange unit 41, the second heat exchange unit 42, the third heat exchange unit 43, and the fourth heat exchange unit 44 are consistent with each other, and the structure of the first heat exchange unit 41 is used as an example for illustration.

[0086] According to the heat exchange assembly of the present application, the multiple heat exchange units in the heat exchange assembly 40 are configured to be arranged in a one-to-one correspondence with the multiple columns of battery cells 21 and to be able to heat exchange, so that the temperature of the multiple columns of battery cells 21 can be effectively controlled. Since two adjacent heat exchange units are connected by a first connecting member 451, and the first connecting member 451 is configured as an electrical insulating member, there is no conductive connection between the two adjacent heat exchange units. When one of the multiple columns of battery cells 21 has an insulation failure, the heat exchange unit corresponding to the column of battery cells 21 having the insulation failure cannot be electrically connected to other heat exchange units, thereby reducing the phenomenon that the battery cells 21 with insulation failure are electrically connected to other battery cells 21 through the heat exchange unit.

[0087] Combination Figure 5 , Figure 8 and Fig. 9 As shown, in some embodiments of the present application, the first heat exchange unit 41 includes a first collector 411, a second collector 412 and at least one heat exchange element, the first collector 411 and the second collector 412 extend respectively along the first direction and are spaced apart along the second direction, at least one heat exchange element is disposed between the first collector 411 and the second collector 412, and a heat exchange channel connecting the first collector 411 and the second collector 412 is disposed inside the at least one heat exchange element, wherein the second direction is the other of the length direction and the width direction of the battery 10.

[0088] Specifically, the first heat exchange unit 41 includes a first manifold 411, a second manifold 412 and at least one heat exchange element. The first manifold 411 and the second manifold 412 are tubular elements, respectively, so as to facilitate communication with the heat exchange medium delivery pipeline outside the battery 10. Among them, the first manifold 411 and the second manifold 412 are respectively provided with heat exchange medium flow channels, and the heat exchange medium flow channels inside the first manifold 411 and the second manifold 412 are respectively connected to the heat exchange channels in the heat exchange element, so as to input and output the heat exchange medium into and out of the heat exchange channel, thereby adjusting the temperature of the heat exchange element, and heat exchange with the battery cell 21 through the heat exchange element, thereby adjusting the temperature of the battery cell 21. Among them, the first collecting pipes 411 of the first heat exchange unit 41, the second heat exchange unit 42, the third heat exchange unit 43 and the fourth heat exchange unit 44 are respectively arranged on the same side of the heat exchange component 40 along the second direction, and the second collecting pipes 412 of the first heat exchange unit 41, the second heat exchange unit 42, the third heat exchange unit 43 and the fourth heat exchange unit 44 are respectively arranged on the other side of the heat exchange component 40 along the second direction.

[0089] Combination Figure 5 , Figure 8 and Fig. 9As shown, in some embodiments of the present application, at least one heat exchange element includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes extend along the second direction and are arranged at intervals along the first direction, and a heat exchange channel connecting the first collecting pipe 411 and the second collecting pipe 412 is provided inside any heat exchange tube, and the plurality of heat exchange tubes are configured to correspond to the same column of battery cells 21 and to be capable of heat exchange.

[0090] In some embodiments of the present application, the plurality of heat exchange tubes may include two or more heat exchange tubes. For the convenience of description, the embodiments of the present application are described by taking a single heat exchange unit including two heat exchange tubes as an example. Specifically, the first heat exchange unit 41 includes a first heat exchange tube 413 and a second heat exchange tube 414, the first heat exchange tube 413 and the second heat exchange tube 414 extend respectively along the second direction, and the first heat exchange tube 413 and the second heat exchange tube 414 are arranged at intervals along the first direction. Heat exchange channels are respectively provided inside the first heat exchange tube 413 and the second heat exchange tube 414, the two ends of the first heat exchange tube 413 are respectively connected to the heat exchange medium flow channels inside the first header 411 and the second header 412, the two ends of the second heat exchange tube 414 are respectively connected to the heat exchange medium flow channels inside the first header 411 and the second header 412, and the first heat exchange tube 413 and the second heat exchange tube 414 are jointly attached to the same column of battery cells 21 and can exchange heat.

[0091] By providing a plurality of heat exchange tubes, and configuring the plurality of heat exchange tubes to correspond to the same column of battery cells 21 and to be capable of heat exchange, heat exchange can be simultaneously performed with the battery cells 21 through the plurality of heat exchange tubes, thereby improving the heat exchange efficiency between the first heat exchange unit 41 and the battery cells 21, and the number of heat exchange tubes in the same heat exchange component and the spacing between the heat exchange tubes can be reasonably controlled according to installation requirements, thereby facilitating the installation of the heat exchange assembly 40.

[0092] Combination Figure 8 , Fig.10 and Fig.11 As shown, in some embodiments of the present application, the flow directions in adjacent heat exchange channels in the same heat exchange unit are arranged in the same direction or in the opposite direction. Figure 8 , Fig.10 and Fig.11 The direction indicated by the black unidirectional straight arrow is the flow direction in the heat exchange assembly 40 .

[0093] like Figure 8 or Fig.10As shown, in some embodiments of the present application, the flow directions in adjacent heat exchange channels in the first heat exchange unit 41 are set to be the same. By adjusting the liquid inlet position and the liquid outlet position in the first heat exchange unit 41, and adjusting the structure in the first header 411 and the second header 412 in the first heat exchange unit 41, the flow directions in adjacent heat exchange channels in the first heat exchange unit 41 can be adjusted, thereby adjusting the heat exchange efficiency between the first heat exchange unit 41 and the battery cell 21.

[0094] like Fig.11 As shown, in some embodiments of the present application, the flow directions in adjacent heat exchange channels in the first heat exchange unit 41 are set oppositely. By adjusting the liquid inlet position and the liquid outlet position in the first heat exchange unit 41, and adjusting the structures in the first header 411 and the second header 412 in the first heat exchange unit 41, the flow directions in adjacent heat exchange channels in the first heat exchange unit 41 can be adjusted, thereby adjusting the heat exchange efficiency between the first heat exchange unit 41 and the battery cell 21.

[0095] Combination Figure 5 , Figure 8 and Fig. 9 As shown, in some embodiments of the present application, the heat exchange tube is a harmonica tube.

[0096] The harmonica tube has a simple structure and is easy to process. Compared with a round tube, the contact area between the harmonica tube and the battery cell 21 is larger, thereby improving the heat exchange efficiency between the first heat exchange tube 413 and the second heat exchange tube 414 and the battery cell 21. In some embodiments of the present application, the surface of the harmonica tube can also be processed as required, such as by insulating spraying or attaching a high-temperature resistant insulating film to improve the insulation safety of the heat exchange assembly 40.

[0097] Combination Figure 8 , Fig.10 and Fig.11 As shown, in some embodiments of the present application, the heat exchange component 40 also includes a liquid inlet 415 and a liquid outlet 416, and the liquid inlet 415 and the liquid outlet 416 are jointly arranged on the same side of the heat exchange component 40 along the second direction, or the liquid inlet 415 and the liquid outlet 416 are respectively arranged on both sides of the heat exchange component 40 along the second direction.

[0098] Specifically, according to the requirements of installation and use, the liquid inlet 415 and the liquid outlet 416 can be jointly arranged on the same side of the heat exchange component 40 along the second direction, that is, the liquid inlet 415 and the liquid outlet 416 can be jointly arranged on one of the first collecting pipe 411 and the second collecting pipe 412, such as the liquid inlet 415 and the liquid outlet 416 are respectively arranged on the first collecting pipe 411 at both ends of the heat exchange component 40 along the first direction. Alternatively, the liquid inlet 415 and the liquid outlet 416 may be respectively arranged on both sides of the heat exchange component 40 along the second direction, that is, the liquid inlet 415 is arranged on one of the first collecting pipe 411 and the second collecting pipe 412, and the liquid outlet 416 is arranged on the other of the first collecting pipe 411 and the second collecting pipe 412, such as the liquid inlet 415 is arranged on the first collecting pipe 411 on one side of the heat exchange component 40 along the first direction, and the liquid outlet 416 is arranged on the second collecting pipe 412 on the other side of the heat exchange component 40 along the first direction.

[0099] Combination Figure 8 , Fig.10 and Fig.11 As shown, in some embodiments of the present application, the flow directions in the heat exchange channels of two adjacent heat exchange units are arranged to be the same and / or opposite.

[0100] like Figure 8 As shown, in some embodiments of the present application, the flow directions in the heat exchange channels of two adjacent heat exchange units are arranged in opposite directions, such as the flow directions in the first heat exchange unit 41 and the second heat exchange unit 42 are arranged in opposite directions.

[0101] like Fig.10 As shown, in some embodiments of the present application, the flow directions in the heat exchange channels of some two adjacent heat exchange units are set to the same, and the flow directions in the heat exchange channels of another part of two adjacent heat exchange units are set to opposite directions, such as the flow directions in the first heat exchange unit 41 and the second heat exchange unit 42 are set to the same, and the flow directions in the second heat exchange unit 42 and the third heat exchange unit 43 are set to opposite directions.

[0102] like Fig.11 As shown, in some embodiments of the present application, the flow directions in the heat exchange channels of two adjacent heat exchange units are set to be the same, such as the flow directions in the first heat exchange unit 41 and the second heat exchange unit 42 are set to be the same.

[0103] By adjusting the liquid inlet position and the liquid outlet position in the heat exchange unit, and adjusting the structure in the first collecting pipe 411 and the second collecting pipe 412 in the heat exchange unit, the flow direction in the heat exchange channel of two adjacent heat exchange units can be adjusted, thereby adjusting the heat exchange efficiency between the heat exchange assembly and the battery cell 21.

[0104] Combination Figure 8 , Fig. 9 , Fig.12 and Fig.13 As shown, in some embodiments of the present application, a guide channel 4511 is provided inside the first connecting member 451 , and the heat exchange channels in two adjacent heat exchange units are connected through the guide channel 4511 .

[0105] Combination Figure 8 , Fig. 9 , Fig.12 and Fig.13 As shown, in some embodiments of the present application, the second header 412 of the first heat exchange unit 41 is connected to the second header 412 of the second heat exchange unit 42 through the guide channel 4511, the first header 411 of the second heat exchange unit 42 is connected to the first header 411 of the third heat exchange unit 43 through the guide channel 4511, and the second header 412 of the third heat exchange unit 43 is connected to the second header 412 of the fourth heat exchange unit 44 through the guide channel 4511, thereby realizing the sequential connection of the first heat exchange unit 41, the second heat exchange unit 42, the third heat exchange unit 43 and the fourth heat exchange unit 44, and the guide direction is as follows: Figure 8 shown.

[0106] By setting a guide channel 4511 inside the first connecting member 451, the heat exchange channels in two adjacent heat exchange units are connected through the guide channel 4511, so that the heat exchange medium can flow through multiple heat exchange units in sequence, thereby improving the utilization rate of the heat exchange medium and reducing the setting of connecting pipelines.

[0107] Combination Figures 8 to 13 As shown, in some embodiments of the present application, two connecting joints 45 are provided between two adjacent heat exchange units, the first collecting pipes 411 of the two adjacent heat exchange units are connected through one of the connecting joints 45, the second collecting pipes 412 of the two adjacent heat exchange units are connected through the other connecting joint 45, and the heat exchange channels of the two adjacent heat exchange units are connected through at least one connecting joint 45.

[0108] Combination Figure 8 , Fig. 9 , Fig.12 and Fig.13As shown, in some embodiments of the present application, the second header 412 of the first heat exchange unit 41 is connected to the second header 412 of the second heat exchange unit 42 through the guide channel 4511, and the first header 411 of the first heat exchange unit 41 is not connected to the first header 411 of the second heat exchange unit 42. The first header 411 of the second heat exchange unit 42 is connected to the first header 411 of the third heat exchange unit 43 through the guide channel 4511, and the second header 412 of the second heat exchange unit 42 is not connected to the second header 412 of the third heat exchange unit 43. The second header 412 of the third heat exchange unit 43 is connected to the second header 412 of the fourth heat exchange unit 44 through the guide channel 4511, and the first header 411 of the third heat exchange unit 43 is not connected to the first header 411 of the fourth heat exchange unit 44.

[0109] Combination Fig. 9 , Fig.10 , Fig.12 and Fig.13 As shown, in some embodiments of the present application, the first header 411 of the first heat exchange unit 41 is connected to the first header 411 of the second heat exchange unit 42 through the guide channel 4511, and the second header 412 of the first heat exchange unit 41 is connected to the second header 412 of the second heat exchange unit 42 through the guide channel 4511. The first header 411 of the second heat exchange unit 42 is connected to the first header 411 of the third heat exchange unit 43, and the second header 412 of the second heat exchange unit 42 is connected to the second header 412 of the third heat exchange unit 43 through the guide channel 4511. The second header 412 of the third heat exchange unit 43 is connected to the second header 412 of the fourth heat exchange unit 44 through the guide channel 4511, and the first header 411 of the third heat exchange unit 43 is connected to the first header 411 of the fourth heat exchange unit 44 through the guide channel 4511.

[0110] Combination Fig. 9 , Fig.11 , Fig.12 and Fig.13As shown, in some embodiments of the present application, the first header 411 of the first heat exchange unit 41 is connected to the first header 411 of the second heat exchange unit 42 through the guide channel 4511, and the second header 412 of the first heat exchange unit 41 is not connected to the second header 412 of the second heat exchange unit 42. The first header 411 of the second heat exchange unit 42 is connected to the first header 411 of the third heat exchange unit 43 through the guide channel 4511, and the second header 412 of the second heat exchange unit 42 is not connected to the second header 412 of the third heat exchange unit 43. The first header 411 of the third heat exchange unit 43 is connected to the first header 411 of the fourth heat exchange unit 44 through the guide channel 4511, and the second header 412 of the third heat exchange unit 43 is not connected to the second header 412 of the fourth heat exchange unit 44.

[0111] By providing two connecting joints 45 between two adjacent heat exchange units, the two connecting joints 45 are respectively used to connect the two adjacent heat exchange units, thereby improving the connection strength between the two adjacent heat exchange units, thereby improving the overall connection strength of the heat exchange assembly 40.

[0112] Combination Fig. 9 and Fig.14 As shown, in some embodiments of the present application, the flow area of ​​the first collecting pipe 411 in the same heat exchange unit gradually increases along the direction from the liquid inlet 415 to the liquid outlet 416, and / or the flow area of ​​the second collecting pipe 412 in the same heat exchange unit gradually increases along the direction from the liquid inlet 415 to the liquid outlet 416.

[0113] Specifically, along the direction from the liquid inlet 415 to the liquid outlet 416, the flow area of ​​the first header 411 of the first heat exchange unit 41 gradually increases, that is, the radial size of the tube cavity of the first header 411 gradually increases. And / or, along the direction from the liquid inlet 415 to the liquid outlet 416, the flow area of ​​the second header 412 of the first heat exchange unit 41 gradually increases, that is, the radial size of the tube cavity of the second header 412 gradually increases.

[0114] In some embodiments of the present application, the first header 411 of the second heat exchange unit 42, the third heat exchange unit 43, and the fourth heat exchange unit 44 may be arranged in the same manner as the first header 411 of the first heat exchange unit 41. The second header 412 of the second heat exchange unit 42, the third heat exchange unit 43, and the fourth heat exchange unit 44 may be arranged in the same manner as the second header 412 of the first heat exchange unit 41.

[0115] By gradually increasing the flow area of ​​the first collecting pipe 411 of the first heat exchange unit 41, the resistance encountered by the heat exchange medium in the first collecting pipe 411 of the first heat exchange unit 41 can be reduced, thereby improving the heat exchange efficiency of the heat exchange medium in the first heat exchange unit 41; by gradually increasing the flow area of ​​the second collecting pipe 412 of the first heat exchange unit 41, the resistance encountered by the heat exchange medium in the second collecting pipe 412 of the first heat exchange unit 41 can be reduced, thereby improving the heat exchange efficiency of the heat exchange medium in the first heat exchange unit 41.

[0116] Combination Fig. 9 and Fig.15 As shown, in some embodiments of the present application, along the direction from the liquid inlet 415 toward the liquid outlet 416, the flow area of ​​the first collecting pipe 411 in the multiple heat exchange units gradually increases, and / or, along the direction from the liquid inlet 415 toward the liquid outlet 416, the flow area of ​​the second collecting pipe 412 in the multiple heat exchange units gradually increases.

[0117] Specifically, along the direction from the liquid inlet 415 to the liquid outlet 416, the flow areas of the first headers 411 of the first heat exchange unit 41, the second heat exchange unit 42, the third heat exchange unit 43 and the fourth heat exchange unit 44 gradually increase in sequence, that is, the radial size of the tube cavity of the first headers 411 of the first heat exchange unit 41, the second heat exchange unit 42, the third heat exchange unit 43 and the fourth heat exchange unit 44 gradually increases. And / or, along the direction from the liquid inlet 415 to the liquid outlet 416, the flow areas of the second headers 412 of the first heat exchange unit 41, the second heat exchange unit 42, the third heat exchange unit 43 and the fourth heat exchange unit 44 gradually increase in sequence, that is, the radial size of the tube cavity of the second headers 412 of the first heat exchange unit 41, the second heat exchange unit 42, the third heat exchange unit 43 and the fourth heat exchange unit 44 gradually increases.

[0118] By gradually increasing the flow areas of the first collecting pipes 411 in multiple heat exchange units in sequence, the resistance encountered by the heat exchange medium in the multiple first collecting pipes 411 of the heat exchange component 40 during flow can be reduced, thereby improving the heat exchange efficiency of the heat exchange medium in the heat exchange component 40; by gradually increasing the flow areas of the second collecting pipes 412 in multiple heat exchange units in sequence, the resistance encountered by the heat exchange medium in the multiple second collecting pipes 412 of the heat exchange component 40 during flow can be reduced, thereby improving the heat exchange efficiency of the heat exchange medium in the heat exchange component 40.

[0119] Combination Figure 8 , Fig.12 and Fig.13 As shown, in some embodiments of the present application, the first connecting member 451 includes at least one of a rubber member or a plastic member.

[0120] Rubber parts and plastic parts are common electrical insulating parts that are easy to process and have low manufacturing costs.

[0121] Specifically, the end of the first connector 451 can be directly sleeved on the outside of the first header 411 or the second header 412, and is interference-connected and sealed with the first header 411 and the second header 412. Compared with the rigid connection between the first connector 451 and the first header 411 or the second header 412, the sealing effect is better, the operation is convenient, and the overall weight of the heat exchange assembly 40 can be reduced.

[0122] Combination Figure 8 , Fig.12 and Fig.13 As shown, in some embodiments of the present application, the connecting joint 45 further includes a second connecting member 452 , and the second connecting member 452 is sleeved on the outside of the first connecting member 451 .

[0123] The second connecting member 452 is sleeved on the outside of the first connecting member 451 and can be used to improve the supporting strength of the connecting joint 45, thereby facilitating the fixed connection of the connecting joint 45 to the heat exchange unit.

[0124] Combination Figure 8 , Fig.12 and Fig.13 As shown, in some embodiments of the present application, the second connecting member 452 includes at least one of a plastic member or a metal member.

[0125] The plastic parts and the metal parts are easy to process and have a certain rigidity, so that it is convenient to fix and clamp the first connecting member 451 to the outside of the first header 411 or the second header 412 .

[0126] Combination Figure 8 , Fig.12 and Fig.13 As shown, in some embodiments of the present application, two protrusions 4521 are spaced apart on the outside of the second connecting member 452 , and the protrusions 4521 are provided to facilitate operation and assembly of the second connecting member.

[0127] The second aspect of the present application discloses a battery 10, combined with Figure 2 , Figure 5 , Figure 8 and Fig. 9 As shown, in some embodiments of the present application, the battery 10 includes a heat exchange assembly 40 of any of the above-mentioned embodiments, and the battery 10 also includes a box body 30 and multiple columns of battery cells 21, a receiving cavity is formed inside the box body 30, and the multiple columns of battery cells 21 are arranged in the receiving cavity at intervals along a first direction; wherein the multiple heat exchange units in the heat exchange assembly 40 are configured to be arranged one-to-one with the multiple columns of battery cells 21 and capable of heat exchange.

[0128] Specifically, multiple rows of battery cells 21 are respectively connected to the first heat exchange tubes 413 and the second heat exchange tubes 414 in the multiple heat exchange units, and exchange heat with the battery cells through the first heat exchange tubes 413 and the second heat exchange tubes 414 .

[0129] By configuring the multiple heat exchange units in the heat exchange assembly 40 to correspond one-to-one to the multiple columns of battery cells 21 and to be able to exchange heat, the temperature of the multiple columns of battery cells 21 can be effectively controlled. Since two adjacent heat exchange units are connected by a first connector 451, and the first connector 451 is configured as an electrical insulating member, there is no conductive connection between the two adjacent heat exchange units. When the insulation of one of the multiple columns of battery cells 21 fails, the heat exchange unit corresponding to the column of battery cells 21 with the insulation failure cannot be electrically connected to other heat exchange units, thereby reducing the phenomenon of the battery cell 21 with the insulation failure being electrically connected to other battery cells 21 through the heat exchange unit.

[0130] Combination Figures 4 to 9 As shown, in some embodiments of the present application, the battery cell 21 is provided with a pressure relief mechanism 215, and the pressure relief mechanism 215 is arranged on the surface of the battery cell 21 facing the heat exchange component 40. The heat exchange unit includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes extend along the second direction and are arranged at intervals along the first direction. The pressure relief mechanism 215 is arranged corresponding to the interval space between two adjacent heat exchange tubes, wherein the second direction is the other of the length direction and the width direction of the battery 10.

[0131] In some embodiments of the present application, the electrode terminals 214 and the pressure relief mechanism 215 may be disposed on different surfaces of the battery cell 21, and the pressure relief mechanism 215 may be disposed on the surface of the battery cell 21 facing the heat exchange assembly 40. Specifically, the pressure relief mechanism 215 may be disposed at an intermediate position between the first heat exchange tube 413 and the second heat exchange tube 414 along the first direction. In some embodiments of the present application, the electrode terminals 214 and the pressure relief mechanism 215 may also be disposed on different surfaces of the battery cell 21, and may be disposed together on the surface of the battery cell 21 facing the heat exchange assembly 40. Accordingly, in order to enable the first heat exchange tube 413 and the second heat exchange tube 414 to exchange heat with the battery cell 21, a corresponding space for avoiding the electrode terminals 214 is also required on the heat exchange assembly 40.

[0132] When the battery cell 21 is in thermal runaway, a large amount of high-temperature and high-pressure gas will be released, and the pressure relief mechanism 215 can be in an open state, so as to discharge the gas in the battery cell 21, thereby reducing further damage to the battery cell 21. By setting the pressure relief mechanism 215 in correspondence with the spacing between the first heat exchange tube 413 and the second heat exchange tube 414, the spacing between the first heat exchange tube 413 and the second heat exchange tube 414 forms an exhaust channel for the pressure relief mechanism 215, reducing the obstruction of the gas flowing out through the pressure relief mechanism 215, improving the exhaust efficiency of the pressure relief mechanism 215, and at the same time reducing the gas flowing out through the pressure relief mechanism 215 on the heat exchange component 40, reducing the damage to the heat exchange component 40 under the impact of high-speed airflow. Among them, the pressure relief mechanism 215 can be an explosion-proof valve.

[0133] A third aspect of the present application provides an electrical device, which includes any one of the above-mentioned batteries 10, and the battery 10 is used to provide electrical energy.

[0134] Specifically, the electrical device may be a vehicle 1 , which includes a battery 10 according to any one of the above embodiments, and the battery 10 is used to provide electrical energy for the vehicle 1 , and to drive and control the vehicle 1 to move.

[0135] 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.

[0136] like Figure 1 As shown, a vehicle 1 includes a battery 10, and the battery 10 is used to provide electrical energy for the vehicle 1 and drive and control the vehicle 1 to move.

[0137] Combination Figures 2 to 8 As shown, the battery 10 in this embodiment includes a box body 30, multiple columns of battery cells 21 and a heat exchange assembly 40. The box body 30 is formed with a receiving cavity inside. Multiple columns of battery cells 21 are arranged in the receiving cavity at intervals along the first direction. The heat exchange assembly 40 includes multiple heat exchange units and a connection joint 45. Multiple heat exchange units are arranged at intervals along the first direction. Multiple heat exchange units are configured to correspond to multiple columns of battery cells 21 one by one and can exchange heat. The connection joint 45 at least includes a first connector 451, which is configured as an electrical insulating member. Two adjacent heat exchange units are connected by the first connector 451. The connection joint 45 also includes a second connector 452, which is sleeved on the outside of the first connector 451. Among them, the first direction is one of the length direction and the width direction of the battery 10. The first connector 451 includes at least one of a rubber member or a plastic member. The second connector 452 includes at least one of a plastic member or a metal member.

[0138] Combination Figures 5 to 9 As shown, the plurality of heat exchange units include a first heat exchange unit 41, a second heat exchange unit 42, a third heat exchange unit 43 and a fourth heat exchange unit 44 which are arranged one by one corresponding to the plurality of columns of battery cells 21, and the structures of the first heat exchange unit 41, the second heat exchange unit 42, the third heat exchange unit 43 and the fourth heat exchange unit 44 are consistent. The first heat exchange unit 41 includes a first header 411, a second header 412 and at least one heat exchange element, the first header 411 and the second header 412 extend respectively along the first direction and are arranged at intervals along the second direction, at least one heat exchange element is arranged between the first header 411 and the second header 412, and a heat exchange channel connecting the first header 411 and the second header 412 is arranged inside the at least one heat exchange element, wherein the second direction is the other of the length direction and the width direction of the battery 10.

[0139] At least one heat exchange component includes a first heat exchange tube 413 and a second heat exchange tube 414, and the first heat exchange tube 413 and the second heat exchange tube 414 are harmonica tubes. The first heat exchange tube 413 and the second heat exchange tube 414 extend along the second direction and are arranged at intervals along the first direction. The first heat exchange tube 413 and the second heat exchange tube 414 are respectively provided with heat exchange channels connecting the first header 411 and the second header 412. The heat exchange channels of the first heat exchange tube 413 and the second heat exchange tube 414 have the same flow direction. The first heat exchange tube 413 and the second heat exchange tube 414 are configured to fit together with the same column of battery cells 21 and can exchange heat.

[0140] The heat exchange assembly 40 further includes a liquid inlet 415 and a liquid outlet 416, which are arranged on the same side of the heat exchange assembly 40 along the second direction, the liquid inlet 415 is arranged at one end of the first header 411 of the first heat exchange unit 41 along the first direction, and the liquid outlet 416 is arranged at the other end of the first header 411 of the fourth heat exchange unit 44 along the first direction. The flow directions in the heat exchange channels of any two adjacent heat exchange units among the first heat exchange unit 41, the second heat exchange unit 42, the third heat exchange unit 43 and the fourth heat exchange unit 44 are arranged in opposite directions.

[0141] Combination Figure 8 , Fig. 9 , Fig.12 and Fig.13As shown, a connection joint 45 is connected between the first headers 411 of any two adjacent heat exchange units, another connection joint 45 is connected between the second headers 412 of any two adjacent heat exchange units, and a flow guide channel 4511 is provided inside the first connection piece 451 of the connection joint 45. The second header 412 of the first heat exchange unit 41 is connected to the second header 412 of the second heat exchange unit 42 through the flow guide channel 4511, and the first header 411 of the first heat exchange unit 41 is not connected to the first header 411 of the second heat exchange unit 42. The first header 411 of the second heat exchange unit 42 is connected to the first header 411 of the third heat exchange unit 43 through the flow guide channel 4511, and the second header 412 of the second heat exchange unit 42 is not connected to the second header 412 of the third heat exchange unit 43. The second header 412 of the third heat exchange unit 43 is connected to the second header 412 of the fourth heat exchange unit 44 through the guide channel 4511 , and the first header 411 of the third heat exchange unit 43 is not connected to the first header 411 of the fourth heat exchange unit 44 .

[0142] Combination Fig. 9 and Fig.14 As shown, along the direction from the liquid inlet 415 to the liquid outlet 416, the flow area of ​​the first header 411 gradually increases, and the flow area of ​​the second header 412 gradually increases.

[0143] Combination Figure 7 and Fig. 9 As shown, the battery cell 21 is provided with a pressure relief mechanism 215 , which is disposed on the surface of the battery cell 21 facing the heat exchange assembly 40 and is disposed corresponding to the interval space between the first heat exchange tube 413 and the second heat exchange tube 414 .

[0144] 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various 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 each embodiment 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 heat exchange assembly for a battery, wherein the battery comprises a plurality of rows of battery cells, wherein the plurality of rows of battery cells are arranged at intervals along a first direction, wherein: The heat exchange component comprises: A plurality of heat exchange units, the plurality of heat exchange units are arranged at intervals along the first direction, and the plurality of heat exchange units are configured to correspond to the plurality of columns of battery cells one by one and to be capable of heat exchange; A connecting joint, the connecting joint at least comprising a first connecting member, the first connecting member being configured as an electrical insulating member, and two adjacent heat exchange units being connected via the first connecting member; The first direction is one of a length direction and a width direction of the battery.

2. The heat exchange assembly according to claim 1, characterized in that: The heat exchange unit includes a first collector, a second collector and at least one heat exchange element, the first collector and the second collector extend respectively along the first direction and are arranged at intervals along the second direction, the at least one heat exchange element is arranged between the first collector and the second collector, and a heat exchange channel connecting the first collector and the second collector is arranged inside the at least one heat exchange element, wherein the second direction is the other of the length direction and the width direction of the battery.

3. The heat exchange assembly according to claim 2, characterized in that: The at least one heat exchange component includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes extend along the second direction and are arranged at intervals along the first direction. The interior of any one of the heat exchange tubes is provided with the heat exchange channel connecting the first collecting pipe and the second collecting pipe, and the plurality of heat exchange tubes are configured to correspond to the battery cells in the same column and to be capable of heat exchange.

4. The heat exchange assembly according to claim 3, characterized in that: The flow directions in adjacent heat exchange channels in the same heat exchange unit are arranged to be the same or opposite.

5. The heat exchange assembly according to claim 2, characterized in that: The heat exchange component also includes a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are arranged on the same side of the heat exchange component along the second direction, or the liquid inlet and the liquid outlet are respectively arranged on both sides of the heat exchange component along the second direction.

6. The heat exchange assembly according to claim 2, characterized in that: The flow directions in the heat exchange channels of two adjacent heat exchange units are arranged to be the same and / or opposite.

7. The heat exchange assembly according to claim 2, characterized in that: A flow guiding channel is provided inside the first connecting member, and the heat exchange channels in two adjacent heat exchange units are connected via the flow guiding channel.

8. The heat exchange assembly according to claim 7, characterized in that: Two connecting joints are provided between two adjacent heat exchange units, the first collecting pipes of the two adjacent heat exchange units are connected through one of the connecting joints, the second collecting pipes of the two adjacent heat exchange units are connected through the other connecting joint, and the heat exchange channels of the two adjacent heat exchange units are connected through at least one connecting joint.

9. The heat exchange assembly according to claim 5, characterized in that: Along the direction from the liquid inlet toward the liquid outlet, the flow area of ​​the first collecting pipe in the same heat exchange unit gradually increases, and / or, along the direction from the liquid inlet toward the liquid outlet, the flow area of ​​the second collecting pipe in the same heat exchange unit gradually increases.

10. The heat exchange assembly according to claim 9, characterized in that: Along the direction from the liquid inlet toward the liquid outlet, the flow areas of the first collecting pipes in the multiple heat exchange units gradually increase in sequence, and / or, along the direction from the liquid inlet toward the liquid outlet, the flow areas of the second collecting pipes in the multiple heat exchange units gradually increase in sequence.

11. The heat exchange assembly according to any one of claims 1 to 10, characterized in that: The connecting joint further comprises a second connecting piece, and the second connecting piece is sleeved on the outside of the first connecting piece.

12. A battery, characterized in that: The heat exchange assembly according to any one of claims 1 to 11, wherein the battery further comprises: A box body, wherein a receiving cavity is formed inside the box body; A plurality of rows of battery cells, wherein the plurality of rows of battery cells are arranged in the accommodation cavity at intervals along the first direction; The plurality of heat exchange units in the heat exchange assembly are configured to correspond one to one with the plurality of rows of battery cells and to be capable of heat exchange.

13. The battery according to claim 12, characterized in that The battery cell is provided with a pressure relief mechanism, which is arranged on the surface of the battery cell facing the heat exchange component. The heat exchange unit includes a plurality of heat exchange tubes, which extend respectively along a second direction and are arranged at intervals along the first direction. The pressure relief mechanism is arranged corresponding to the interval space between two adjacent heat exchange tubes, wherein the second direction is the other of the length direction and the width direction of the battery.

14. An electrical device, characterized in that: The battery comprising claim 12 or 13, wherein the battery is used to provide electrical energy.

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