Heat exchange assembly, battery module, battery and electric equipment

Abstract

A heat exchange assembly (100), a battery module (300), a battery (400), and an electric device (500), the heat exchange assembly (100) comprising: a heat exchange plate (10) having a heat exchange flow channel (11), the heat exchange plate (10) having a discharge structure (12), the discharge structure (12) being used for corresponding to a pressure relief mechanism (201) of a battery cell (200), in the width direction of the heat exchange plate (10), and the discharge structure (12) being used for discharging the pressure relief mechanism (201) of the battery cell (200) along the width direction of the heat exchange plate (10); at least one side of the discharge structure (12) is provided with the heat exchange runner (11), and the heat exchange runner (11) is used for exchanging heat with the battery monomers (200).

Description

Technical Field

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

[0002] In the related art, a structural beam is provided in the battery box, and a heat exchange plate is integrated in the structural beam. The heat exchange plate is used to exchange heat with the battery cell in the box. Since the explosion-proof valve of the battery cell is corresponding to the heat exchange plate, when the battery cell suffers thermal runaway, the high-temperature and high-pressure material ejected from the explosion-proof valve can easily damage the heat exchange plate, causing damage to the heat exchange flow channel in the heat exchange plate, causing leakage of the heat exchange flow channel. In addition, since the structural dimension of the explosion-proof valve along the thickness direction of the battery cell is large, the heat dissipation area of ​​the battery cell and the heat exchange plate is small, which affects the heat dissipation efficiency of the heat exchange plate and the heat exchange efficiency between the battery cell and the heat exchange plate. At the same time, the existing heat exchange plate has a complex structure and is not convenient for production and manufacturing. Utility Model Content

[0003] This application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of this application is to propose a heat exchange assembly that effectively prevents leakage in the heat exchange flow channel, has a simple heat exchange plate structure, is easy to manufacture, and improves the heat exchange efficiency between the battery cell and the heat exchange plate.

[0004] The present application further proposes a battery module.

[0005] The present application further proposes a battery.

[0006] The present application further proposes an electrical device.

[0007] In a first aspect, an embodiment of the present application provides a heat exchange assembly, comprising:

[0008] The heat exchange plate has a heat exchange flow channel and a discharge structure, and the discharge structure is used to correspond to the pressure relief mechanism of the battery cell.

[0009] Along the width direction of the heat exchange plate, at least one side of the discharge structure is provided with a heat exchange channel, and the heat exchange channel is used for exchanging heat with the battery cells.

[0010] In the above technical solution, by setting up a discharge structure, when a battery cell experiences thermal runaway, the high-temperature and high-pressure material ejected from the battery cell is sprayed through the heat exchange plate from the discharge structure, thereby avoiding damage to the heat exchange flow channel in the heat exchange plate and effectively preventing leakage of the heat exchange flow channel. In addition, the heat exchange plate of the present application has a simple structure and is easy to produce. At the same time, a heat exchange flow channel is provided on at least one side of the discharge structure to ensure that there is sufficient heat dissipation area between the battery cell and the heat exchange plate, thereby improving the heat exchange efficiency between the battery cell and the heat exchange plate.

[0011] In some embodiments, heat exchange channels are provided on both sides of the drainage structure.

[0012] In the above technical solution, heat exchange channels are provided on both sides of the excretion structure, and the heat exchange channels on both sides of the excretion structure are used to exchange heat with the battery cells, which can further increase the heat exchange area between the battery cells and the heat exchange plate, improve the heat exchange efficiency of the heat exchange plate, and further improve the heat exchange efficiency between the battery cells and the heat exchange plate.

[0013] In some embodiments, the heat exchange channel extends along the length of the heat exchange plate.

[0014] In the above technical solution, by extending the heat exchange channel along the length direction of the heat exchange plate, the setting area of ​​the heat exchange channel can be increased. Each heat exchange channel can exchange heat with multiple battery cells, further improving the heat exchange efficiency of the heat exchange plate.

[0015] In some embodiments, the maximum width of the heat exchange channel is D1, and the maximum width of the pressure relief mechanism of the battery cell is D2, satisfying the relationship: 0.05D1≤D2≤D1.

[0016] In the above technical solution, by setting 0.05D1≤D2≤D1, the flow velocity of the heat exchange medium in the heat exchange channel can be guaranteed, the heat exchange channel can be easily processed on the heat exchange plate, and the heat exchange area between the battery cell and the heat exchange plate can be guaranteed.

[0017] In some embodiments, there are multiple heat exchange channels, which are arranged in sequence along the width direction of the heat exchange plate, and a drainage structure is provided between at least two adjacent heat exchange channels.

[0018] In the above technical solution, by providing a drainage structure between at least two adjacent heat exchange channels, the two adjacent heat exchange channels can exchange heat with the same battery cell at the same time, thereby improving the heat exchange efficiency between the battery cell and the heat exchange plate, and allowing the battery cell to heat up or cool down quickly.

[0019] In some embodiments, there are multiple drainage structures arranged in sequence along the length direction of the heat exchange plate between at least two adjacent heat exchange channels.

[0020] In the above technical solution, there are multiple drainage structures arranged in sequence along the length direction of the heat exchange plate between at least two adjacent heat exchange channels, and each drainage structure is set corresponding to the pressure relief mechanism of at least one battery cell. Two adjacent heat exchange channels can exchange heat with multiple battery cells at the same time, which can further improve the heat exchange efficiency of the heat exchange plate.

[0021] In some embodiments, along the length direction of the heat exchange plate, the spacing distance between any two adjacent drainage structures is the same.

[0022] In the above technical solution, by making the spacing distance between any two adjacent drainage structures the same, the overall structural consistency of the heat exchange plate can be improved, the production of the heat exchange plate can be facilitated, and the production efficiency of the heat exchange plate can be improved.

[0023] In some embodiments, the multiple heat exchange channels include: a first end heat exchange channel, a second end heat exchange channel and a middle heat exchange channel, the middle heat exchange channel is located between the first end heat exchange channel and the second end heat exchange channel, and the width dimension of the first end heat exchange channel and the width dimension of the second end heat exchange channel are both smaller than the total width dimension of the middle heat exchange channel.

[0024] In the above technical solution, since the same central heat exchange channel can exchange heat with two adjacent layers of battery cells, the width dimension of the first end heat exchange channel and the width dimension of the second end heat exchange channel are both smaller than the total width dimension of the central heat exchange channel, it can be ensured that the central heat exchange channel and each battery cell have sufficient heat exchange area, and the heat exchange efficiency between the battery cell and the heat exchange plate can be guaranteed.

[0025] In some embodiments, there are multiple middle heat exchange channels.

[0026] In the above technical solution, by providing a plurality of middle heat exchange channels, the heat exchange plate can exchange heat with more battery cells at the same time, which can further improve the heat exchange efficiency of the heat exchange plate.

[0027] In some embodiments, the heat exchange channel is configured in a wavy shape.

[0028] In the above technical solution, by configuring the heat exchange channel in a wave shape, the setting area of ​​the heat exchange channel can be increased, and the heat exchange area between the heat exchange channel and the battery cell can be increased.

[0029] In some embodiments, one of two adjacent heat exchange channels includes a first arc segment, and the other includes a second arc segment, and the first arc segment and the second arc segment are opposite to each other along the width direction of the heat exchange plate.

[0030] The first arc segment and the second arc segment are configured to bend in directions away from each other, and the at least one drainage structure is located between the first arc segment and the second arc segment.

[0031] In the above technical solution, by locating at least one discharge structure between the first arc segment and the second arc segment, the setting area of ​​the heat exchange channel can be further increased, and the heat exchange area between the heat exchange channel and the battery cell can be further increased, thereby further improving the heat exchange efficiency of the heat exchange plate.

[0032] In some embodiments, the plurality of heat exchange channels are interconnected.

[0033] In the above technical solution, by interconnecting multiple heat exchange channels, the heat exchange medium in the heat exchange channels can flow freely in the multiple heat exchange channels, which can improve the consistency of heat exchange efficiency in different areas of the heat exchange plate, thereby reducing the temperature difference between multiple battery cells.

[0034] In some embodiments, the heat exchange plate has a connecting flow channel, and the connecting flow channel connects multiple heat exchange flow channels.

[0035] In the above technical solution, by providing connecting flow channels, the effect of interconnection of multiple heat exchange flow channels is achieved.

[0036] In some embodiments, the drainage structure is shaped like a bar, and the drainage structure extends along the length direction of the heat exchange plate.

[0037] In the above technical solution, by configuring the shape of the drainage structure into a strip, the drainage structure can be adapted to the pressure relief mechanism of the battery cell, and the width of the drainage structure can be reduced, thereby increasing the setting width of the heat exchange channel, thereby increasing the heat exchange area between the heat exchange channel and the battery cell, and greatly improving the heat exchange efficiency of the heat exchange plate.

[0038] In some embodiments, the drainage structure is configured as a drainage hole.

[0039] In the above technical solution, by setting the discharge structure as a discharge hole, when a battery cell experiences thermal runaway, it can be ensured that the high-temperature and high-pressure substances ejected from the battery cell are sprayed through the heat exchange plate from the discharge hole. This can also reduce the difficulty of producing the heat exchange plate, improve the production efficiency of the heat exchange plate, and reduce the production cost of the heat exchange plate.

[0040] In some embodiments, the drainage structure is configured as a weak portion, and when the pressure on the weak portion reaches a preset value and / or the temperature reaches a preset temperature, the weak portion is separated from the heat exchange plate.

[0041] In the above technical solution, by setting the discharge structure as the weak part, when the battery cell suffers thermal runaway, it can be ensured that the high-temperature and high-pressure material ejected from the battery cell will be sprayed through the heat exchange plate from the weak part, thus avoiding the explosion of the battery cell.

[0042] In some embodiments, the heat exchange plate has indentations to form weakened portions on the heat exchange plate.

[0043] In the above technical solution, by providing indentations on the heat exchange plate, it is possible to achieve the effect of forming a weak portion on the heat exchange plate.

[0044] In some embodiments, the heat exchange plate has a medium inlet and a medium outlet, and the heat exchange channel connects the medium inlet and the medium outlet.

[0045] In the above technical solution, the medium inlet and the medium outlet are connected by the heat exchange channel, so that the heat exchange medium can flow into and out of the heat exchange channel, thereby ensuring the heat exchange efficiency of the heat exchange plate.

[0046] In some embodiments, along the thickness direction of the heat exchange plate, the heat exchange channel protrudes from one side surface of the heat exchange plate, and the other side surface of the heat exchange plate is configured as a plane.

[0047] In the above technical solution, by constructing the other side surface of the heat exchange plate into a plane, when the other side surface of the heat exchange plate contacts the battery cell, the battery cell and the heat exchange plate are in surface contact, which can increase the contact area between the heat exchange plate and the battery cell and improve the heat exchange efficiency between the heat exchange plate and the battery cell.

[0048] In some embodiments, along the thickness direction of the heat exchange plate, the heat exchange channel and the drainage structure both protrude from the same side surface of the heat exchange plate.

[0049] In the above technical solution, by protruding the heat exchange channel and the drainage structure from the same side surface of the heat exchange plate, when the drainage structure is arranged opposite to the pressure relief mechanism of the battery cell, it can ensure that the heat exchange channel contacts and exchanges heat with the battery cell.

[0050] In some embodiments, the heat exchange assembly further includes a main body, and the heat exchange plate is attached to at least one side of the main body.

[0051] In the above technical solution, by attaching the heat exchange plate to at least one side of the main body, the heat exchange plate can be integrated into the main body, so that the main body has heat exchange performance.

[0052] In some embodiments, the main body is provided with a groove, and at least a portion of the heat exchange plate is accommodated in the groove.

[0053] In the above technical solution, the heat exchange plate can be fixed to the main body by accommodating at least a portion of the heat exchange plate in the groove.

[0054] In some embodiments, the heat exchange plate is the heat exchange plate described above, and the surface of the heat exchange plate on one side protruding with the heat exchange channel faces the groove.

[0055] In the above technical solution, by making the side surface of the heat exchange plate protruding with the heat exchange channel face the groove, the other side surface of the heat exchange plate constructed as a plane can be in contact with the battery cell for heat exchange, which can ensure that the contact area between the battery cell and the heat exchange plate is increased.

[0056] In a second aspect, an embodiment of the present application further provides a battery module, comprising:

[0057] Heat exchange component, the heat exchange component is the heat exchange component mentioned above;

[0058] The battery cell is located on at least one side of the heat exchange plate. The discharge structure corresponds to the pressure relief mechanism of the battery cell, and the heat exchange channel is arranged corresponding to the battery cell.

[0059] In some embodiments, the heat exchange assembly is the aforementioned heat exchange assembly, and the surface of the battery cell provided with the pressure relief mechanism is attached to the flat surface of the heat exchange plate.

[0060] In the above technical solution, the surface of one side of the battery cell provided with the pressure relief mechanism is attached to the flat surface of the heat exchange plate, and the battery cell and the heat exchange plate are in surface contact, which can increase the contact area between the heat exchange plate and the battery cell and improve the heat exchange efficiency between the heat exchange plate and the battery cell.

[0061] In some embodiments, the pressure relief mechanism is configured as a strip structure extending along the length direction of the heat exchange plate.

[0062] In the above technical solution, by constructing the pressure relief mechanism into a strip structure, the width of the pressure relief mechanism can be reduced, the heat exchange area between the battery cell and the heat exchange plate can be increased, and the heat exchange efficiency of the heat exchange plate can be improved.

[0063] In some embodiments, the battery cell includes a plurality of strip-shaped pressure relief mechanisms extending along the length direction of the heat exchange plate, and the plurality of pressure relief mechanisms are disposed on the same end surface of the battery cell.

[0064] In the above technical solution, by providing a plurality of strip-shaped pressure relief mechanisms, when thermal runaway occurs in a battery cell, it does not affect the pressure relief of high-temperature and high-pressure substances ejected from the battery cell, thereby effectively avoiding the explosion of the battery cell.

[0065] In a third aspect, an embodiment of the present application further provides a battery, comprising the above-mentioned battery module.

[0066] In a fourth aspect, an embodiment of the present application further provides an electrical device comprising the above-mentioned battery, which is used to provide electrical energy.

[0067] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0069] Figure 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0070] Figure 2 is an exploded view of a battery according to some embodiments of the present application;

[0071] Figure 3 is a schematic diagram of the assembly of battery cells and heat exchange components in some embodiments of the present application;

[0072] Figure 4 is a schematic diagram of a heat exchange assembly in some embodiments of the present application having a layer of battery cells on both sides;

[0073] Figure 5 is a side view of a heat exchange assembly provided with two heat exchange channels in some embodiments of the present application;

[0074] Figure 6 is a schematic diagram of a heat exchange assembly in some embodiments of the present application having two layers of battery cells on both sides;

[0075] Figure 7 is a side view of a heat exchange assembly provided with three heat exchange channels in some embodiments of the present application;

[0076] Figure 8 is a schematic diagram of a heat exchange assembly in some embodiments of the present application having three layers of battery cells on both sides;

[0077] Figure 9 is a side view of a heat exchange assembly provided with four heat exchange channels in some embodiments of the present application;

[0078] Figure 10 is a schematic diagram of a battery cell according to some embodiments of the present application. DETAILED DESCRIPTION

[0079] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0080] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0081] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0082] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0083] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0084] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and do not constitute any limitation on this application.

[0085] The term "plurality" used in this application refers to two or more (including two).

[0086] In the present application, the battery cell 200 may include a lithium-ion secondary battery 400, a lithium-ion primary battery 400, a lithium-sulfur battery 400, a sodium-lithium-ion battery 400, a sodium-ion battery 400, or a magnesium-ion battery 400, etc., and the embodiments of the present application do not limit this. The battery cell 200 may be cylindrical, flat, rectangular, or other shapes, and the embodiments of the present application do not limit this. The battery cell 200 is generally divided into three types according to the packaging method: cylindrical battery cells 200, square battery cells 200, and soft-pack battery cells 200, and the embodiments of the present application do not limit this.

[0087] The battery 400 referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells 200 to provide higher voltage and capacity. For example, the battery 400 referred to in this application may include a battery module 300 or a battery pack 400. The battery 400 generally includes a housing for enclosing one or more battery cells 200 or multiple battery modules 300. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells 200.

[0088] The battery cell 200 may include a housing, an electrode assembly, and an electrolyte. The housing is used to accommodate the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell 200 mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking the lithium-ion battery 400 as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet consists of a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative current collector uncoated with the negative active material layer protrudes from the negative current collector coated with the negative active material layer. The negative current collector uncoated with the negative active material layer serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure that high currents can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together.

[0089] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0090] The existing battery box is provided with a structural beam, and the structural beam is integrated with a heat exchange plate. The heat exchange plate is used to exchange heat with the battery cell in the box. Since the explosion-proof valve of the battery cell is correspondingly arranged with the heat exchange plate, when the battery cell suffers thermal runaway, the high-temperature and high-pressure material ejected from the explosion-proof valve can easily damage the heat exchange plate, causing damage to the heat exchange flow channel in the heat exchange plate, causing leakage of the heat exchange flow channel. In addition, since the structural dimension of the explosion-proof valve along the thickness direction of the battery cell is large, the heat exchange area between the battery cell and the heat exchange plate is small, which affects the heat exchange efficiency of the heat exchange plate and the heat exchange efficiency between the battery cell and the heat exchange plate. At the same time, the existing heat exchange plate has a complex structure and is not convenient for production and manufacturing.

[0091] The battery 400 disclosed in the embodiments of this application can be used, but is not limited to, in an electrical device 500 such as a vehicle, a ship, or an aircraft. A power supply system comprising the battery 400 thermal management system disclosed in this application, the battery 400, and the like can be used to form the electrical device. This helps expand the applicability of the battery 400 thermal management system and reduces the difficulty of assembling the battery 400 thermal management system.

[0092] The present embodiment provides an electric device 500 that uses a battery 400 as a power source. The electric device 500 may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0093] For the convenience of description, the following embodiments are described by taking an electric device 500 of an embodiment of the present application as a vehicle as an example.

[0094] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 400 is provided inside the vehicle, and the battery 400 can be provided at the bottom, head or tail of the vehicle. The battery 400 can be used to power the vehicle. For example, the battery 400 can serve as an operating power source for the vehicle. The vehicle may also include a controller 600 and a motor 700. The controller 600 is used to control the battery 400 to power the motor 700, for example, for starting, navigating and operating power requirements of the vehicle during driving.

[0095] In some embodiments of the present application, the battery 400 can serve not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0096] Please refer to Figure 2 , Figure 2An exploded diagram of the structure of a battery 400 provided for some embodiments of the present application. The battery 400 includes a housing and a battery module 300, and the battery module 300 is used to be accommodated in the housing. Among them, the battery module 300 includes a plurality of battery cells 200 and a heat exchange assembly 100, and the housing is used to provide assembly space for the battery cells 200 and the heat exchange assembly 100. The housing can adopt a variety of structures. In some embodiments, the housing can include a first housing body 402 and a second housing body 403, and the first housing body 402 and the second housing body 403 cover each other, and the first housing body 402 and the second housing body 403 jointly define an assembly space for accommodating the battery cells 200 and the heat exchange assembly 100. The second box body 403 can be a hollow structure with one end open, and the first box body 402 can be a plate-like structure. The first box body 402 covers the open side of the second box body 403, so that the first box body 402 and the second box body 403 jointly define an assembly space. The first box body 402 and the second box body 403 can also be hollow structures with one end open, and the open side of the first box body 402 covers the open side of the second box body 403. Of course, the box formed by the first box body 402 and the second box body 403 can be of various shapes, such as a cylinder, a cuboid, etc.

[0097] In the battery 400, multiple battery cells 200 can be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to multiple battery cells 200 being connected both in series and in parallel. Multiple battery cells 200 can be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure of the multiple battery cells 200 is housed within a housing. Alternatively, the battery 400 can be constructed by first connecting multiple battery cells 200 in series, in parallel, or in a hybrid configuration and then combining them with a heat exchange assembly 100 to form a battery module 300. The multiple battery modules 300 are then connected in series, in parallel, or in a hybrid configuration to form a single structure, which is then housed within a housing. The battery 400 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 200.

[0098] like Figure 2 and Figure 3 As shown, the battery 400 includes at least one layer of battery cells 200. For example, the battery 400 includes multiple layers of battery cells 200. The multiple layers of battery cells 200 are arranged along a first direction. The first direction refers to Figure 3 In the X direction, each layer of battery cells 200 includes a plurality of battery cells 200 arranged along the second direction. The second direction refers to the length direction of the heat exchange plate 10, that is, the second direction refers to Figure 3 The first direction and the second direction are respectively the height direction and the length direction of the box, and the first direction and the second direction are perpendicular to each other.

[0099] Each battery cell 200 may be a secondary battery 400 or a primary battery 400; it may also be a lithium-sulfur battery 400, a sodium-ion battery 400 or a magnesium-ion battery 400, but is not limited thereto. The battery cell 200 may be cylindrical, flat, rectangular or other shapes. For example, in Figure 3 In FIG, the battery cell 200 is in the shape of a rectangular parallelepiped.

[0100] Reference below Figure 2-Figure 10 A heat exchange assembly 100 according to an embodiment of the present application is described.

[0101] like Figure 2-Figure 10 As shown, the heat exchange assembly 100 according to the embodiment of the present application includes: a heat exchange plate 10, the heat exchange plate 10 has a heat exchange flow channel 11, the heat exchange plate 10 has a drainage structure 12, the drainage structure 12 is used to correspond to the pressure relief mechanism 201 of the battery cell 200, the pressure relief mechanism 201 of the battery cell 200 is an explosion-proof valve of the battery cell 200, the battery cell 200 is arranged on one side of the heat exchange plate 10, and the pressure relief mechanism 201 of the battery cell 200 is arranged opposite to the drainage structure 12. Along the width direction of the heat exchange plate 10, that is, Figure 4 In the middle X direction, a heat exchange channel 11 is provided on at least one side of the excretion structure 12. The heat exchange channel 11 is used to exchange heat with the battery cell 200. It should be noted that there is a heat exchange medium in the heat exchange channel 11. After the heat exchange plate 10 and the battery cell 200 come into contact, the heat exchange channel 11 exchanges heat with the battery cell 200 to achieve cooling and heating effects on the battery cell 200.

[0102] Among them, the heat exchange component 100 serves as a structural beam in the box body, and a drainage channel can be formed in the heat exchange component 100. The battery cell 200 is in contact with the heat exchange plate 10, and the pressure relief mechanism 201 of the battery cell 200 is arranged opposite to the drainage structure 12, and the pressure relief mechanism 201 of the battery cell 200 is adjacent to the drainage structure 12. When the battery cell 200 has thermal runaway, the high-temperature and high-pressure substances ejected from the battery cell 200 are sprayed from the drainage structure 12 through the heat exchange plate 10 and flow into the drainage channel. The high-temperature and high-pressure substances ejected from the battery cell 200 are discharged from the drainage channel to the battery 400, effectively avoiding the high-temperature and high-pressure substances ejected from the battery cell 200. The heat exchange channel 11 in the heat exchange plate 10 is effectively prevented from leaking by the heat exchange channel 11. Moreover, by providing the heat exchange channel 11 on at least one side of the discharge structure 12, after the battery cell 200 contacts the heat exchange plate 10, it can ensure that there is sufficient heat exchange area between the battery cell 200 and the heat exchange channel 11, so that there is sufficient heat exchange area between the battery cell 200 and the heat exchange plate 10, thereby improving the heat exchange efficiency between the battery cell 200 and the heat exchange plate 10, making the temperature of the battery cell 200 appropriate, and reducing the risk of thermal runaway of the battery cell 200. At the same time, the heat exchange plate 10 of the present application has a simple structure, is easy to produce and manufacture, and has a low manufacturing cost.

[0103] Therefore, by setting up the discharge structure 12, when the battery cell 200 has thermal runaway, the high-temperature and high-pressure material ejected from the battery cell 200 is sprayed through the heat exchange plate 10 from the discharge structure 12, thereby avoiding damage to the heat exchange channel 11 in the heat exchange plate 10 and effectively preventing leakage of the heat exchange channel 11. In addition, the heat exchange plate 10 of the present application has a simple structure and is easy to produce. At the same time, a heat exchange channel 11 is provided on at least one side of the discharge structure 12, ensuring that there is sufficient heat dissipation area between the battery cell 200 and the heat exchange plate 10, thereby improving the heat exchange efficiency between the battery cell 200 and the heat exchange plate 10.

[0104] According to some embodiments of the present application, Figure 4-Figure 9 As shown, heat exchange channels 11 are provided on both sides of the drainage structure 12 along the width of the heat exchange plate 10. After the heat exchange plate 10 and the battery cell 200 are assembled, the pressure relief mechanism 201 of the battery cell 200 is correspondingly arranged with the drainage structure 12. The heat exchange channels 11 on both sides of the drainage structure 12 can both contact and exchange heat with the battery cell 200, further increasing the heat exchange area between the battery cell 200 and the heat exchange channels 11, improving the heat exchange efficiency of the heat exchange plate 10, and further improving the heat exchange efficiency between the battery cell 200 and the heat exchange plate 10.

[0105] Heat exchange channels 11 are provided on both sides of the excretion structure 12. The heat exchange channels 11 on both sides of the excretion structure 12 are used to exchange heat with the battery cells 200, which can further increase the heat exchange area between the battery cells 200 and the heat exchange plate 10, improve the heat exchange efficiency of the heat exchange plate 10, and further improve the heat exchange efficiency between the battery cells 200 and the heat exchange plate 10.

[0106] According to some embodiments of the present application, Figure 5 、 Figure 7 and Figure 9 As shown, the heat exchange channel 11 extends along the length direction of the heat exchange plate 10. The length direction of the heat exchange plate 10 is Figure 5 、 Figure 7 and Figure 9 In the Y direction, the heat exchange channel 11 can be set to a straight line shape. Since a layer of battery cells 200 has multiple battery cells 200, the multiple battery cells 200 in each layer are arranged in sequence along the length direction of the heat exchange plate 10, and the multiple battery cells 200 in each layer are in contact with the heat exchange channel 11 for heat exchange.

[0107] By extending the heat exchange channels 11 along the length of the heat exchange plate 10, the area in which the heat exchange channels 11 are located can be increased. Each heat exchange channel 11 can exchange heat with multiple battery cells 200, further improving the heat exchange efficiency of the heat exchange plate 10. Furthermore, configuring the heat exchange channels 11 in a straight line simplifies the structure of the heat exchange plate 10, facilitating its manufacture and reducing its production cost.

[0108] According to some embodiments of the present application, along the width direction of the heat exchange plate 10, the maximum width of the heat exchange channel 11 is D1, and the maximum width of the pressure relief mechanism 201 of the battery cell 200 is D2, satisfying the relationship: 0.05D1≤D2≤D1. The maximum width of the heat exchange channel 11 refers to the maximum width of each heat exchange channel 11, which is D1. If the width of the heat exchange channel 11 is too large, the flow rate of the heat exchange medium in the heat exchange channel 11 will be affected, resulting in low heat exchange efficiency of the heat exchange plate 10. If the width of the heat exchange channel 11 is too small, it will be difficult to process the heat exchange channel 11 on the heat exchange plate 10, increasing the difficulty of manufacturing the heat exchange plate 10.

[0109] In the present application, by ensuring that 0.05D1≤D2≤D1, the width of the heat exchange channel 11 can be made appropriate, the flow rate of the heat exchange medium in the heat exchange channel 11 can be guaranteed, the heat exchange efficiency of the heat exchange plate 10 can be guaranteed, and the heat exchange area between the battery cell 200 and the heat exchange plate 10 can be guaranteed. It is also convenient to process the heat exchange channel 11 on the heat exchange plate 10, reducing the difficulty of manufacturing the heat exchange plate 10.

[0110] According to some embodiments of the present application, Figure 4-Figure 9 As shown, multiple heat exchange channels 11 can be provided, and the multiple heat exchange channels 11 are arranged in sequence along the width direction of the heat exchange plate 10, and a drainage structure 12 is provided between at least two adjacent heat exchange channels 11. Specifically, the multiple heat exchange channels 11 are arranged in sequence along the width direction of the heat exchange plate 10, and a drainage structure 12 is provided between at least two adjacent heat exchange channels 11. This application uses the example of providing a drainage structure 12 between any two adjacent heat exchange channels 11. After the heat exchange plate 10 is assembled with the battery cell 200, the two adjacent heat exchange channels 11 can both contact and exchange heat with the battery cell 200.

[0111] By providing a drainage structure 12 between at least two adjacent heat exchange channels 11, the two adjacent heat exchange channels 11 can simultaneously exchange heat with the same battery cell 200, thereby improving the heat exchange efficiency between the battery cell 200 and the heat exchange plate 10, and allowing the battery cell 200 to be quickly heated or cooled. In addition, by providing a drainage structure 12 between two adjacent heat exchange channels 11, the effect of having heat exchange channels 11 on both sides of the drainage structure 12 is achieved.

[0112] According to some embodiments of the present application, Figure 4-Figure 9 As shown, there are multiple drainage structures 12 arranged in sequence along the length direction of the heat exchange plate 10 between at least two adjacent heat exchange channels 11. The length direction of the heat exchange plate 10 is Figure 5 、 Figure 7 、 Figure 9In the Y direction, this application uses the example of multiple drainage structures 12 between any two adjacent heat exchange channels 11. The multiple drainage structures 12 between two adjacent heat exchange channels 11 are sequentially spaced apart along the length of the heat exchange plate 10, and each drainage structure 12 is corresponding to the pressure relief mechanism 201 of at least one battery cell 200 in each layer. This application assumes that each drainage structure 12 is corresponding to the pressure relief mechanism 201 of one battery cell 200.

[0113] By providing multiple drainage structures 12 arranged in sequence along the length direction of the heat exchange plate 10 between at least two adjacent heat exchange channels 11, each drainage structure 12 is arranged corresponding to the pressure relief mechanism 201 of at least one battery cell 200. Two adjacent heat exchange channels 11 can exchange heat with multiple battery cells 200 at the same time, which can further improve the heat exchange efficiency of the heat exchange plate 10.

[0114] According to some embodiments of the present application, Figure 4-Figure 9 As shown, along the length direction of the heat exchange plate 10, the length direction of the heat exchange plate 10 refers to Figure 5 、 Figure 7 、 Figure 9 In the Y direction, the spacing distance between any two adjacent drainage structures 12 is the same. It should be noted that among the multiple drainage structures 12 between any two adjacent heat exchange channels 11, the spacing distance between any two adjacent drainage structures 12 along the length direction of the heat exchange plate 10 is the same.

[0115] By making the intervals between any two adjacent drainage structures 12 the same, the overall structural consistency of the heat exchange plate 10 can be improved, the production of the heat exchange plate 10 can be facilitated, and the production efficiency of the heat exchange plate 10 can be improved.

[0116] According to some embodiments of the present application, Figure 6-Figure 9 As shown, the multiple heat exchange channels 11 may include: a first end heat exchange channel 13, a second end heat exchange channel 14 and a middle heat exchange channel 15. Along the width direction of the heat exchange plate 10, the middle heat exchange channel 15 is located between the first end heat exchange channel 13 and the second end heat exchange channel 14. The first end heat exchange channel 13, the second end heat exchange channel 14 and the middle heat exchange channel 15 can be arranged parallel to each other. The width dimension of the first end heat exchange channel 13 and the width dimension of the second end heat exchange channel 14 are both smaller than the total width dimension of the middle heat exchange channel 15. Among them, when multiple layers of battery cells 200 are arranged along the width direction of the heat exchange plate 10, the first end heat exchange channel 13 and the second end heat exchange channel 14 located at the end are both used to exchange heat with one layer of battery cells 200, while the middle heat exchange channel 15 located in the middle can exchange heat with two layers of battery cells 200 at the same time. If the width of the middle heat exchange channel 15 is too small, it will affect the heat exchange efficiency between the middle heat exchange channel 15 and the battery cells 200.

[0117] Since the same central heat exchange channel 15 can exchange heat with two adjacent layers of battery cells 200, the width dimension of the first end heat exchange channel 13 and the width dimension of the second end heat exchange channel 14 are both smaller than the total width dimension of the central heat exchange channel 15, which can ensure that the width dimension of the central heat exchange channel 15 is appropriate, and can ensure that the central heat exchange channel 15 and each battery cell 200 have sufficient heat exchange area, which can ensure the heat exchange efficiency between the battery cell 200 and the heat exchange plate 10.

[0118] According to some embodiments of the present application, Figure 8 and Figure 9 As shown, the middle heat exchange channel 15 can be provided in multiple configurations, such as Figure 9 As shown, for example, two middle heat exchange channels 15 can be provided, and the two adjacent middle heat exchange channels 15 are spaced apart from each other. A drainage structure 12 is provided between any two middle heat exchange channels 15, a drainage structure 12 is provided between the middle heat exchange channel 15 and the first end heat exchange channel 13, and a drainage structure 12 is provided between the middle heat exchange channel 15 and the second end heat exchange channel 14.

[0119] By providing multiple middle heat exchange channels 15 , the heat exchange plate 10 can exchange heat with more layers of battery cells 200 at the same time, and the heat exchange efficiency of the heat exchange plate 10 can be further improved.

[0120] According to some embodiments of the present application, the heat exchange channel 11 is configured in a wavy shape. It should be noted that at least one heat exchange channel 11 is configured in a wavy shape. By configuring the heat exchange channel 11 in a wavy shape, the length of the heat exchange channel 11 can be increased, the area of ​​the heat exchange channel 11 can be increased, and the heat exchange area between the heat exchange channel 11 and the battery cell 200 can be increased. This can improve the efficiency of the heat exchange plate 10 in cooling or heating the battery cell 200 per unit time.

[0121] According to some embodiments of the present application, one of two adjacent heat exchange channels 11 includes a first arc segment, and the other of the two adjacent heat exchange channels 11 includes a second arc segment. The first arc segment and the second arc segment are positioned opposite each other along the width direction of the heat exchange plate 10. The first arc segment and the second arc segment are configured to bend in directions away from each other. At least one drainage structure 12 is located between the first arc segment and the second arc segment. This application uses the example of a drainage structure 12 located between the first arc segment and the second arc segment as an example. The heat exchange channel 11 having a first arc segment includes a plurality of first arc segments, which are arranged in sequence along the length direction of the heat exchange plate 10. The heat exchange channel 11 having a second arc segment includes a plurality of second arc segments, which are arranged in sequence along the length direction of the heat exchange plate 10. The plurality of first arc segments and the plurality of second arc segments are arranged in a one-to-one correspondence, and a drainage structure 12 is located between the first and second arc segments. By setting the first arc segment and the second arc segment, after the battery cell 200 is assembled with the heat exchange plate 10, the first arc segment and the second arc segment can both exchange heat with the same battery cell 200. Since the first arc segment and the second arc segment are both arc-shaped, the setting area of ​​the heat exchange channel 11 can be further increased, and the heat exchange area between the first arc segment and the second arc segment and the corresponding battery cell 200 can be increased, thereby further improving the heat exchange efficiency of the heat exchange plate 10.

[0122] By locating at least one drainage structure 12 between the first arc segment and the second arc segment, the setting area of ​​the heat exchange channel 11 can be further increased, and the heat exchange area between the heat exchange channel 11 and the battery cell 200 can be further increased, thereby further improving the heat exchange efficiency of the heat exchange plate 10.

[0123] According to some embodiments of the present application, a plurality of heat exchange channels 11 are interconnected, for example: Figure 5 As shown, there are two heat exchange channels 11, and the two heat exchange channels 11 are connected, or as shown in FIG. Figure 7 As shown, there are three heat exchange channels 11, and the three heat exchange channels 11 are interconnected. It can also be understood that any two heat exchange channels 11 are interconnected, or as shown in FIG. Figure 9 As shown, there are four heat exchange channels 11 , and the four heat exchange channels 11 are interconnected. It can also be understood that any two of the four heat exchange channels 11 are interconnected.

[0124] By interconnecting the multiple heat exchange channels 11, the heat exchange medium in the heat exchange channels 11 can flow freely in the multiple heat exchange channels 11, thereby improving the consistency of heat exchange efficiency in different areas of the heat exchange plate 10. When the battery cell 200 exchanges heat with the heat exchange plate 10, the temperature difference between the multiple battery cells 200 can be reduced, thereby improving the temperature consistency between the multiple battery cells 200.

[0125] According to some embodiments of the present application, Figure 5 、 Figure 7 and Figure 9 As shown, the heat exchange plate 10 has a connecting channel 16 that connects multiple heat exchange channels 11. There can be one connecting channel, in which case one connecting channel connects to multiple heat exchange channels 11. Alternatively, there can be multiple connecting channels. When the number of heat exchange channels 11 is greater than or equal to three, at least one connecting channel connects any two heat exchange channels 11. By providing the connecting channel 16, multiple heat exchange channels 11 can be interconnected.

[0126] According to some embodiments of the present application, the drainage structure 12 is configured in a strip shape and extends along the length of the heat exchange plate 10. Since the pressure relief mechanism 201 of the battery cell 200 is a strip-shaped structure, configuring the drainage structure 12 in a strip shape allows the drainage structure 12 to be compatible with the pressure relief mechanism 201 of the battery cell 200. This also reduces the width of the drainage structure 12, allowing the heat exchange plate 10 to have more width for arranging the heat exchange channel 11. This increases the width of the heat exchange channel 11, thereby increasing the heat exchange area between the heat exchange channel 11 and the battery cell 200, significantly improving the heat exchange efficiency of the heat exchange plate 10.

[0127] According to some embodiments of the present application, Figure 5 、 Figure 7 and Figure 9 As shown, the drainage structure 12 can be configured as a drainage hole 17. After the battery cell 200 is assembled and contacted with the heat exchange plate 10, the pressure relief mechanism 201 of the battery cell 200 is arranged opposite the drainage hole 17. When the battery cell 200 experiences thermal runaway, the high-temperature and high-pressure material ejected from the battery cell 200 is sprayed from the drainage hole 17 through the heat exchange plate 10 and flows into the drainage channel. The high-temperature and high-pressure material ejected from the battery cell 200 is discharged from the battery 400 through the drainage channel.

[0128] By setting the drainage structure 12 as the drainage hole 17, when the battery cell 200 has thermal runaway, it can be ensured that the high-temperature and high-pressure material ejected from the battery cell 200 is sprayed through the heat exchange plate 10 from the drainage hole 17. In addition, the processing of the drainage hole 17 is simple and convenient, which can also reduce the difficulty of producing the heat exchange plate 10, improve the production efficiency of the heat exchange plate 10, and reduce the production cost of the heat exchange plate 10.

[0129] According to some embodiments of the present application, the drainage structure 12 is configured as a weak portion. When the pressure on the weak portion reaches a preset value and / or the temperature reaches a preset temperature, the weak portion separates from the heat exchange plate 10. This can also be understood as separating from the heat exchange plate 10 when the pressure on the weak portion reaches a preset value, separating from the heat exchange plate 10 when the temperature on the weak portion reaches a preset temperature, or separating from the heat exchange plate 10 when the pressure on the weak portion reaches a preset value and the temperature reaches a preset temperature. After the battery cell 200 is assembled and in contact with the heat exchange plate 10, the pressure relief mechanism 201 of the battery cell 200 is positioned directly opposite the weak portion. When the battery cell 200 experiences thermal runaway, the high-temperature and high-pressure material ejected from the battery cell 200 is ejected toward the weak portion. Under the action of the high temperature and high pressure, the weak portion separates from the heat exchange plate 10 to form a drainage hole 17. The high-temperature and high-pressure material ejected from the battery cell 200 is ejected from the drainage hole 17 through the heat exchange plate 10 and into the drainage channel. The high-temperature and high-pressure material ejected from the battery cell 200 is discharged from the battery 400 through the drainage channel.

[0130] By setting the discharge structure 12 as a weak part, when the battery cell 200 has thermal runaway, it can be ensured that the high-temperature and high-pressure material ejected from the battery cell 200 will spray through the heat exchange plate 10 from the weak part, thereby preventing the battery cell 200 from exploding.

[0131] According to some embodiments of the present application, the heat exchange plate 10 has an indentation to form a weak portion on the heat exchange plate 10. After the battery cell 200 is assembled and in contact with the heat exchange plate 10, the pressure relief mechanism 201 of the battery cell 200 is positioned directly opposite the weak portion. When the battery cell 200 experiences thermal runaway, high-temperature and high-pressure material ejected from the battery cell 200 is ejected toward the weak portion. Under the action of the high temperature and high pressure, the weak portion separates from the heat exchange plate 10 at the indentation.

[0132] By setting indentations on the heat exchange plate 10, a weak portion can be formed on the heat exchange plate 10, and the weak portion can be separated from the heat exchange plate 10 when the pressure on the weak portion reaches a preset value or the temperature reaches a preset temperature.

[0133] According to some embodiments of the present application, the heat exchange plate 10 has a medium inlet and a medium outlet, and the heat exchange channel 11 connects the medium inlet and the medium outlet. The heat exchange medium can flow from the medium inlet into the heat exchange channel 11, and the heat exchange medium flowing into the heat exchange channel 11 can flow along the heat exchange channel 11 to the medium outlet. Finally, the heat exchange medium flows out of the heat exchange plate 10 from the medium outlet, removing the heat. It should be noted that the heat exchange medium can be a liquid heat exchange medium, for example, water, or a gaseous heat exchange medium, for example, gas.

[0134] The heat exchange channel 11 connects the medium inlet and the medium outlet, so that the heat exchange medium can flow into and out of the heat exchange channel 11. The heat exchange medium can continuously take away the heat of the battery cell 200, thereby ensuring the heat exchange efficiency of the heat exchange plate 10.

[0135] According to some embodiments of the present application, Figure 2 and Figure 3 As shown, along the thickness direction of the heat exchange plate 10, the heat exchange channel 11 protrudes from one side of the heat exchange plate 10, while the other side of the heat exchange plate 10 is constructed as a flat surface. After the battery cells 200 are assembled and contacted with the heat exchange plate 10, the other side of the heat exchange plate 10, which is constructed as a flat surface, contacts the battery cells 200, achieving surface-to-surface contact between the battery cells 200 and the heat exchange plate 10. This increases the contact area between the heat exchange plate 10 and the battery cells 200, thereby improving the heat exchange efficiency between the heat exchange plate 10 and the battery cells 200.

[0136] By constructing the other side surface of the heat exchange plate 10 into a plane, when the other side surface of the heat exchange plate 10 contacts the battery cell 200, the battery cell 200 and the heat exchange plate 10 are in surface contact, which can increase the contact area between the heat exchange plate 10 and the battery cell 200 and improve the heat exchange efficiency between the heat exchange plate 10 and the battery cell 200.

[0137] According to some embodiments of the present application, Figure 4 、 Figure 6 and Figure 8 As shown, along the thickness direction of the heat exchange plate 10, the heat exchange channel 11 and the drainage structure 12 both protrude from the same side surface of the heat exchange plate 10, as shown in FIG. Figure 4 、 Figure 6 and Figure 8 As shown, the heat exchange channels 11 and the drainage structure 12 both protrude from the outer surface of the heat exchange plate 10. At least one layer of battery cells 200 is disposed on one side of the heat exchange plate 10. After the battery cells 200 are assembled and contacted with the heat exchange plate 10, the pressure relief mechanisms 201 of the battery cells 200 are positioned opposite the drainage structure 12, and the heat exchange channels 11 protruding from the heat exchange plate 10 come into contact with the corresponding battery cells 200 for heat exchange.

[0138] By protruding the heat exchange channel 11 and the drainage structure 12 from the same side surface of the heat exchange plate 10, when the drainage structure 12 is arranged opposite to the pressure relief mechanism 201 of the battery cell 200, it can ensure that the heat exchange channel 11 and the battery cell 200 are in contact and heat exchange.

[0139] According to some embodiments of the present application, Figure 3As shown, the heat exchange assembly 100 may further include a main body 20, which may be a beam body. The drainage channel may be defined by the main body 20, or the drainage channel may be defined by the main body 20 and the heat exchange plate 10. The heat exchange plate 10 is attached to at least one side of the main body 20, that is, along the thickness direction of the heat exchange assembly 100, the heat exchange plate 10 is arranged on one side of the main body 20, or the heat exchange plate 10 is arranged on both sides of the main body 20. This application takes the example of the heat exchange plate 10 being attached to both sides of the main body 20 for explanation. Figure 3 As shown, at least one layer of battery cells 200 is provided on both sides of the heat exchange assembly 100 . The same heat exchange assembly 100 can exchange heat with more battery cells 200 at the same time, thereby improving the heat exchange efficiency of the heat exchange assembly 100 .

[0140] By attaching the heat exchange plate 10 to at least one side of the main body 20, the heat exchange plate 10 can be integrated into the main body 20, so that the main body 20 has heat exchange performance. In addition, the heat exchange component 100 integrates the heat exchange plate 10 and the drainage channel. After the heat exchange component 100 is installed in the box of the battery 400, there is more space in the box to install the battery cell 200, which improves the space utilization in the box and greatly increases the power of the battery 400.

[0141] Furthermore, the main member 20 is provided with a groove, into which at least a portion of the heat exchange plate 10 is accommodated. The groove is provided on at least one side of the main member 20. This application uses the example of grooves provided on both sides of the main member 20. When assembling the heat exchange plate 10 and the main member 20, the heat exchange plate 10 is fixedly installed in the groove, integrating the heat exchange plate 10 and the main member 20 and securing the heat exchange plate 10 to the main member 20.

[0142] By accommodating at least part of the heat exchange plate 10 in the groove, the heat exchange plate 10 can be fixed to the main body 20, and the space occupied by the heat exchange plate 10 in the box can be further reduced. There is more space in the box to install the battery cell 200, further increasing the power of the battery 400.

[0143] According to some embodiments of the present application, the heat exchange plate 10 is the heat exchange plate 10 of the aforementioned embodiment, and the surface of the heat exchange plate 10 on which the heat exchange channel 11 protrudes faces the groove. The heat exchange channel 11 protrudes from one surface of the heat exchange plate 10, and the other surface of the heat exchange plate 10 is constructed as a plane. The surface of the heat exchange plate 10 on which the heat exchange channel 11 protrudes faces the groove, so that the heat exchange channel 11 is assembled in the groove, and the other surface of the heat exchange plate 10, which is constructed as a plane, is exposed to contact and exchange heat with the battery cells 200.

[0144] By making the side surface of the heat exchange plate 10 protruding with the heat exchange channel 11 face the groove, the other side surface of the heat exchange plate 10 constructed as a plane can be in contact with the battery cell 200 for heat exchange, which can ensure that the contact area between the battery cell 200 and the heat exchange plate 10 is increased. In addition, the heat exchange channel 11 is hidden in the groove, which can further reduce the space occupied by the heat exchange plate 10 in the box, and there is more space in the box to install the battery cell 200, further increasing the power of the battery 400.

[0145] like Figure 2-Figure 10 As shown, according to some embodiments of the present application, the present application further provides a battery module 300, which includes: a heat exchange component 100 and a battery cell 200. The heat exchange component 100 is the heat exchange component 100 of the above embodiment. The battery cell 200 is located on at least one side of the heat exchange plate 10, the discharge structure 12 corresponds to the pressure relief mechanism 201 (i.e., explosion-proof valve) of the battery cell 200, and the heat exchange flow channel 11 is arranged corresponding to the battery cell 200. Among them, as shown in FIG. Figure 3 As shown, along the thickness direction of the heat exchange plate 10, battery cells 200 are arranged on both sides of the heat exchange plate 10. Specifically, the heat exchange assembly 100 can have a main body 20, and heat exchange plates 10 are arranged on both sides of the main body 20. The battery cells 200 are in contact with the heat exchange plates 10 located on the same side of the main body 20 for heat exchange.

[0146] By setting up the discharge structure 12, when the battery cell 200 has thermal runaway, the high-temperature and high-pressure material ejected from the battery cell 200 is sprayed through the heat exchange plate 10 from the discharge structure 12, thereby avoiding damage to the heat exchange channel 11 in the heat exchange plate 10, effectively preventing leakage of the heat exchange channel 11, and extending the service life of the battery module 300. In addition, the heat exchange plate 10 of the present application has a simple structure, is easy to produce and manufacture, and improves the assembly efficiency of the battery module 300. At the same time, along the width direction of the heat exchange plate 10, a heat exchange channel 11 is provided on at least one side of the discharge structure 12 to ensure that there is sufficient heat dissipation area between the battery cell 200 and the heat exchange plate 10, thereby improving the heat exchange efficiency between the battery cell 200 and the heat exchange plate 10.

[0147] According to some embodiments of the present application, the heat exchange component 100 is the heat exchange component 100 of the above embodiment, such as Figure 3 and Figure 10 As shown, the side of the battery cell 200 provided with the pressure relief mechanism 201 is attached to the flat surface of the heat exchange plate 10. By attaching the side of the battery cell 200 provided with the pressure relief mechanism 201 to the flat surface of the heat exchange plate 10, the battery cell 200 and the heat exchange plate 10 are in surface-to-surface contact, which increases the contact area between the heat exchange plate 10 and the battery cell 200 and improves the heat exchange efficiency between the heat exchange plate 10 and the battery cell 200.

[0148] According to some embodiments of the present application, Figure 10As shown, the pressure relief mechanism 201 is constructed as a strip-shaped structure extending along the length of the heat exchange plate 10. The width of the explosion-proof valves on existing battery cells is relatively large along the thickness of the battery cells 200. When the battery cells come into contact with the heat exchange plates, the surface of the battery cells with the explosion-proof valves contacts the heat exchange plates. This large width of the explosion-proof valves reduces the contact area between the battery cells and the heat exchange plates, affecting the heat exchange efficiency between the battery cells and the heat exchange plates.

[0149] In the present application, by setting the pressure relief mechanism 201 as a strip structure extending along the length direction of the heat exchange plate 10, the width of the pressure relief mechanism 201 can be reduced while ensuring that the explosion-proof area is appropriate and does not affect the thermal runaway pressure relief of the battery cell 200, and the heat exchange area between the battery cell 200 and the heat exchange plate 10 can be increased, thereby improving the heat exchange efficiency of the heat exchange plate 10.

[0150] Therefore, by constructing the pressure relief mechanism 201 into a strip structure, the width of the pressure relief mechanism 201 can be reduced, the heat exchange area between the battery cell 200 and the heat exchange plate 10 can be increased, and the heat exchange efficiency of the heat exchange plate 10 can be improved.

[0151] According to some embodiments of the present application, Figure 10 As shown, the battery cell 200 includes multiple strip-shaped pressure relief mechanisms 201 extending along the length of the heat exchange plate 10. For example, the pressure relief mechanisms 201 can be provided in two, three, four, or five numbers, with multiple pressure relief mechanisms 201 positioned on the same end face of the battery cell 200. By positioning multiple pressure relief mechanisms 201 on the same end face of the battery cell 200, after the battery cell 200 is assembled with the heat exchange plate 10, the multiple pressure relief mechanisms 201 of the battery cell 200 are conveniently aligned with the discharge structure 12, ensuring that the high-pressure, high-temperature material ejected from each pressure relief mechanism 201 is directed to the corresponding discharge structure 12. Furthermore, by providing multiple strip-shaped pressure relief mechanisms 201, thermal runaway of the battery cell 200 is not affected, effectively preventing explosion of the battery cell 200.

[0152] According to some embodiments of the present application, a notch 202 may be provided on the outer shell of the battery cell 200, and the notch 202 defines a pressure relief mechanism 201 (i.e., an explosion-proof valve). By defining the pressure relief mechanism 201 through the notch 202, part of the structure of the shell can be constructed as an explosion-proof valve, and there is no need to separately provide an independent explosion-proof valve, which can reduce the cost of the battery cell 200 and simplify the structure of the battery cell 200.

[0153] According to some embodiments of the present application, Figure 2As shown, the present application also provides a battery 400, which includes the battery module 300 of the above embodiment. The battery module 300 is installed in the box of the battery 400. When the battery cell 200 has thermal runaway, the high-temperature and high-pressure material ejected from the battery cell 200 is sprayed through the heat exchange plate 10 from the discharge structure 12, thereby avoiding damage to the heat exchange channel 11 in the heat exchange plate 10, effectively preventing leakage of the heat exchange channel 11, and extending the service life of the battery 400. In addition, the heat exchange plate 10 of the present application has a simple structure, is easy to produce and manufacture, and improves the assembly efficiency of the battery 400. At the same time, a heat exchange channel 11 is provided on at least one side of the discharge structure 12 along the width direction of the heat exchange plate 10, ensuring that there is sufficient heat dissipation area between the battery cell 200 and the heat exchange plate 10, thereby improving the heat exchange efficiency between the battery cell 200 and the heat exchange plate 10.

[0154] According to some embodiments of the present application, Figure 1 As shown, the present application further provides an electric device 500 , which includes the battery 400 of the above embodiment. The battery 400 is used to provide electric energy. The battery 400 is used to provide electric energy to the electric device 500 .

[0155] The powered device 500 may be any of the aforementioned devices or systems using the battery 400 .

[0156] According to some embodiments of the present application, see Figure 3-10 As shown, the present application provides a battery module 300, which includes a heat exchange assembly 100 and at least one layer of battery cells 200. Each layer of battery cells 200 includes multiple battery cells 200. The multiple battery cells 200 in each layer of battery cells 200 are arranged sequentially along the length of the heat exchange plate 10, and each battery cell 200 is provided with a strip-shaped pressure relief mechanism 201. The heat exchange assembly 100 includes a heat exchange plate 10, which is provided with at least one layer of drainage structure 12. Each layer of drainage structure 12 includes multiple drainage structures 12, and the drainage structures 12 are all configured as strip structures. The multiple drainage structures 12 in each layer of drainage structure 12 are arranged sequentially along the length of the heat exchange plate 10, and the multiple drainage structures 12 in each layer are provided in a one-to-one correspondence with the multiple battery cells 200. The heat exchange plate 10 has multiple heat exchange channels 11, which are spaced sequentially along the width of the plate 10. A drain structure 12 is provided between any two adjacent heat exchange channels 11. The multiple heat exchange channels 11 extend along the length of the plate 10. When the battery cells 200 are assembled with the heat exchange plate 10, they exchange heat with two adjacent heat exchange channels 11, increasing the heat exchange area, ensuring sufficient heat dissipation between the battery cells 200 and the plate 10, and improving the heat exchange efficiency between the two regions.

[0157] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0158] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery module, characterized in that: include: Battery cells; A heat exchange assembly, the heat exchange assembly includes a heat exchange plate and a main body. Along the thickness direction of the heat exchange assembly, the heat exchange plate is attached to both sides of the main body. The heat exchange plate has a heat exchange flow channel. The heat exchange plate has a drainage structure. At least one layer of the battery cell is provided on both sides of the heat exchange assembly. The drainage structure corresponds to the pressure relief mechanism of the corresponding battery cell. Along the width direction of the heat exchange plate, at least one side of the drainage structure is provided with the heat exchange flow channel, and the heat exchange flow channel is used to exchange heat with the battery cell.

2. The battery module according to claim 1, wherein: The heat exchange channels are provided on both sides of the discharge structure.

3. The battery module according to claim 1, wherein: The heat exchange channel extends along the length direction of the heat exchange plate.

4. The battery module according to claim 1, wherein: The maximum width of the heat exchange channel is D1, and the maximum width of the pressure relief mechanism of the battery cell is D2, satisfying the relationship: 0.05D1≤D2≤D1.

5. The battery module according to claim 1, wherein: There are multiple heat exchange channels, and the multiple heat exchange channels are arranged in sequence along the width direction of the heat exchange plate, and the drainage structure is provided between at least two adjacent heat exchange channels.

6. The battery module according to claim 5, characterized in that There are multiple drainage structures arranged in sequence along the length direction of the heat exchange plate between at least two adjacent heat exchange channels.

7. The battery module according to claim 6, characterized in that Along the length direction of the heat exchange plate, the spacing distance between any two adjacent drainage structures is the same.

8. The battery module according to any one of claims 5 to 7, characterized in that: The multiple heat exchange channels include: a first end heat exchange channel, a second end heat exchange channel and a middle heat exchange channel. The middle heat exchange channel is located between the first end heat exchange channel and the second end heat exchange channel. The width dimension of the first end heat exchange channel and the width dimension of the second end heat exchange channel are both smaller than the total width dimension of the middle heat exchange channel.

9. The battery module according to claim 8, characterized in that: There are multiple middle heat exchange channels.

10. The battery module according to any one of claims 5 to 7, characterized in that: The heat exchange channel is configured in a wave shape.

11. The battery module according to claim 10, characterized in that One of the two adjacent heat exchange channels includes a first arc segment, and the other includes a second arc segment. The first arc segment and the second arc segment are opposite to each other along the width direction of the heat exchange plate. The first arc segment and the second arc segment are constructed to bend in directions away from each other, and at least one drainage structure is located between the first arc segment and the second arc segment.

12. The battery module according to any one of claims 5 to 7, characterized in that: The plurality of heat exchange channels are interconnected.

13. The battery module according to claim 12, characterized in that: The heat exchange plate has a connecting flow channel, and the connecting flow channel connects the plurality of heat exchange flow channels.

14. The battery module according to any one of claims 1 to 7, characterized in that: The drainage structure is configured in a strip shape and extends along the length direction of the heat exchange plate.

15. The battery module according to any one of claims 1 to 7, characterized in that: The drainage structure is configured as a drainage hole.

16. The battery module according to any one of claims 1 to 7, characterized in that: The drainage structure is configured as a weak portion. When the pressure on the weak portion reaches a preset value and / or the temperature reaches a preset temperature, the weak portion is separated from the heat exchange plate.

17. The battery module according to claim 16, characterized in that The heat exchange plate has an indentation to form the weak portion on the heat exchange plate.

18. The battery module according to any one of claims 1 to 7, characterized in that: The heat exchange plate has a medium inlet and a medium outlet, and the heat exchange channel communicates with the medium inlet and the medium outlet.

19. The battery module according to any one of claims 1 to 7, characterized in that: Along the thickness direction of the heat exchange plate, the heat exchange channel protrudes from one side surface of the heat exchange plate, and the other side surface of the heat exchange plate is configured as a plane.

20. The battery module according to any one of claims 1 to 7, characterized in that: Along the thickness direction of the heat exchange plate, the heat exchange channel and the drainage structure both protrude from the same side surface of the heat exchange plate.

21. The battery module according to claim 1, characterized in that The main body is provided with a groove, and at least a portion of the heat exchange plate is accommodated in the groove.

22. The heat exchange assembly according to claim 21, characterized in that The heat exchange plate is the heat exchange plate according to claim 19, and a surface of the heat exchange plate on one side of which the heat exchange channel protrudes faces the groove.

23. The battery module according to claim 1, wherein: The heat exchange assembly is the heat exchange assembly according to claim 22, and the surface of the battery cell on one side of which the pressure relief mechanism is provided is attached to the flat surface of the heat exchange plate.

24. The battery module according to claim 23, characterized in that The pressure relief mechanism is constructed as a strip structure extending along the length direction of the heat exchange plate.

25. The battery module according to claim 24, characterized in that The battery cell includes a plurality of strip-shaped pressure relief mechanisms extending along the length direction of the heat exchange plate, and the plurality of pressure relief mechanisms are arranged on the same end surface of the battery cell.

26. A battery, characterized in that: Comprising the battery module according to any one of claims 1-25.

27. An electrical device, characterized in that: The battery according to claim 26 is included for providing electrical energy.

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