CN220527007U

CN220527007U - Heat exchange device, battery and electricity utilization device

Info

Publication number: CN220527007U
Application number: CN202321842526.5U
Authority: CN
Inventors: 王峰; 潘鑫; 陈智明; 苗慧敏; 孔卓实; 刘逸飞
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-07-13
Filing date: 2023-07-13
Publication date: 2024-02-23
Anticipated expiration: 2033-07-13

Abstract

The application provides a heat transfer device, battery and power consumption device, heat transfer device for the free heat transfer of battery, its characterized in that, heat transfer device includes: a bottom plate; the separation parts are arranged on the bottom plate at intervals along the first direction, a first cavity is formed by surrounding two adjacent separation parts and the bottom plate, and the battery unit can be arranged in the first cavity and supported on the bottom plate; and the ventilation part is arranged on one side of the bottom plate, which is away from the separation part, and is provided with a ventilation air duct, and air flow can flow through the ventilation air duct and exchange heat with the bottom plate. The heat exchange device can meet the thermal management requirements of the battery monomers, and meanwhile can avoid liquid leakage and improve safety performance.

Description

Heat exchange device, battery and electricity utilization device

Technical Field

The application relates to the field of batteries, in particular to a heat exchange device, a battery and an electric device.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

In the related battery manufacturing process, the heat exchange device of the battery generally uses a liquid to match with a liquid pipeline to carry out heat management on the battery monomer, so that the phenomenon of liquid leakage is easy to occur, and the safety of the battery is influenced. Therefore, improvement of the heat exchange device of the battery is a problem to be solved.

Disclosure of Invention

In view of the above problems, the application provides a heat exchange device, a battery and an electricity consumption device, wherein the heat exchange device can meet the thermal management requirement on a battery monomer, and meanwhile, the phenomenon of liquid leakage can be avoided, so that the safety performance is improved.

In a first aspect, the present application provides a heat exchange device comprising: the heat exchange device comprises: a bottom plate; the separation parts are arranged on the bottom plate at intervals along the first direction, a first cavity is formed by surrounding two adjacent separation parts and the bottom plate, and the battery unit can be arranged in the first cavity and supported on the bottom plate; and the ventilation part is arranged on one side of the bottom plate, which is away from the separation part, and is provided with a ventilation air duct, and air flow can flow through the ventilation air duct and exchange heat with the bottom plate.

In the technical scheme of this application embodiment, heat transfer device includes bottom plate, partition portion and ventilation portion. The two separating parts and the bottom plate enclose to form a first chamber, and the battery unit can be arranged in the first chamber and supported on the bottom plate. The ventilation part is installed in the one side that the bottom plate deviates from the partition portion, is equipped with the ventilation wind channel on the ventilation part, and the air current can flow through the ventilation wind channel and carry out the heat exchange with the bottom plate. The battery monomer can be higher than or be less than the temperature in the course of the work and predetermine, need give off heat simultaneously or absorb heat in order to maintain to predetermine the temperature, the battery monomer supports in the bottom plate and can exchange heat with the bottom plate, the wind of flowing through ventilation wind channel can carry out heat exchange with the bottom plate, and then can realize the free heat transfer of battery, the heat transfer device of this application embodiment passes through the design of bottom plate, partition portion and ventilation portion for heat transfer device can satisfy the thermal management demand to the battery monomer, can avoid the weeping phenomenon to take place simultaneously, improve security performance.

In some embodiments, the number of ventilation air ducts is plural, and the plural ventilation air ducts are disposed independently of each other and extend along a second direction, respectively, and the second direction intersects the first direction.

The number of the ventilation air channels is a plurality of ventilation air channels which are favorable for air flow to uniformly pass through, so that heat exchange of the battery monomers is uniform.

In some embodiments, the vent comprises: a plurality of separators distributed along a third direction; the connecting plate is connected between two adjacent clapboards in the third direction, a plurality of ventilation air channels are formed by enclosing at least two of the clapboards, the connecting plate and the bottom plate, and the third direction, the second direction and the first direction are mutually intersected.

The heat exchange device provided by the embodiment of the application is used for separating the ventilation air duct into a plurality of small air ducts through the plurality of partition plates and the connecting plate, so that the air flow in the ventilation air duct can uniformly flow, and the heat exchange is uniform.

In some embodiments, the plurality of ventilation ducts are layered along a third direction, each layer including at least two ventilation ducts, at least one layer of ventilation ducts being configured to communicate with the temperature regulation apparatus, the third direction, the second direction, and the first direction being disposed intersecting each other.

Through the arrangement, the heat exchange device can save energy of temperature regulation equipment of the power utilization device and save resources.

In some embodiments, the bottom plate comprises a heat exchange plate having a thermal conductivity greater than the thermal conductivity of the partition.

The heat exchange device provided by the embodiment of the application is beneficial to the bottom plate to exchange heat between the battery monomer and the ventilation air duct through the design that the heat conductivity of the bottom plate is greater than that of the separation part, and the heat exchange rate is accelerated.

In some embodiments, the base plate comprises: a plate body; and the phase change material body is arranged in the plate body and can exchange heat with the battery cell and the ventilation part.

In some optional embodiments of the application, heat exchange is performed on the battery monomer by utilizing the heat generated in the phase change material phase change process and the heat absorption distance, so that the energy consumption is reduced, the phase change material is low in price, the industrial application is mature, and the raw materials are easy to obtain.

In some embodiments, the partition comprises: a partition plate having a second chamber inside; and the heat exchange medium is arranged in the second cavity, and the separation plate can be bonded with the battery monomer and exchange heat with the battery monomer and the heat exchange medium. The second cavity is formed in the partition plate, and the heat exchange medium is contained in the cavity, so that heat exchange is conducted on the portion, attached to the partition plate, of the battery cell, and heat exchange efficiency of the battery cell is higher.

In some embodiments, the partition further comprises: the heat conducting pieces are arranged in the second chamber at intervals along the first direction and are connected with the partition plate. The heat conducting piece is favorable for conducting heat of the battery monomer from the partition plate to the heat exchange medium in the second cavity.

In some embodiments, the partition is at least partially a unitary structure with the vent. The sealing structure of the two is beneficial to the sealing performance of the heat exchange device.

In a second aspect, the present application provides a battery comprising: the heat exchange device of any one of the preceding first aspects; and the battery unit is arranged in the first chamber and supported on the bottom plate.

In the technical scheme of this application embodiment, the battery includes heat transfer device and battery monomer. The battery unit is arranged in the first chamber and supported on the bottom plate. The battery unit in the battery can exchange heat with the air flow flowing through the ventilation air duct through the heat exchange device. The heat exchange device of the battery comprises a ventilation part, the ventilation part is provided with a ventilation air duct, air flow passing through the ventilation air duct exchanges heat with the battery monomer, and the heat exchange of the battery monomer is realized by utilizing the air flow flowing through the ventilation air duct, so that the heat exchange efficiency is high. The heat exchange device can meet the thermal management requirement on the battery, and meanwhile, the phenomenon of liquid leakage can be avoided, and the safety performance is improved.

In some embodiments, each cell is sandwiched between and in contact with two adjacent separators. And the lamination between the battery monomer and the separation part is beneficial to heat exchange of the battery monomer.

In a third aspect, the present application provides an electrical device comprising: the battery of any one of the preceding second aspects.

In the technical scheme of this application embodiment, power consumption device includes the battery, and the battery includes heat transfer device and battery monomer. The battery in the power utilization device utilizes the air current that flows through the ventilation duct to realize the heat transfer of battery monomer, and heat transfer device can satisfy the heat management demand to the power utilization device, can avoid the weeping phenomenon to take place simultaneously, improves the security performance.

In some embodiments, the power utilization device further comprises: and the temperature regulating and controlling equipment is connected with the ventilation part of the heat exchange device so as to provide air flow for the ventilation air duct. When the heat exchange needs to be carried out on the battery monomer, the temperature regulation and control equipment can be opened for heat exchange, so that the operability is strong, and the safety and the reliability are high.

In some embodiments, the power utilization device further comprises a temperature regulation cabin connected with the temperature regulation equipment, wherein the air flow provided by the temperature regulation equipment can sequentially flow through the ventilation air duct and the temperature regulation cabin. The power utilization device provided by the embodiment of the application can realize the energy and mechanical energy cyclic utilization of the battery and the energy in the temperature regulation cabin, is more environment-friendly, and reduces the energy loss.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic view of a vehicle according to an embodiment of the present application;

fig. 2 is a schematic structural view of a battery pack according to an embodiment of the present application;

FIG. 3 is an exploded view of a battery pack according to an embodiment of the present application;

fig. 4 is a schematic diagram of an exploded structure of a battery cell according to an embodiment of the present disclosure;

FIG. 5 is a schematic perspective view of a heat exchange device according to an embodiment of the present disclosure;

FIG. 6 is a schematic front cross-sectional view of a heat exchange device according to an embodiment of the present application;

Fig. 7 is a schematic side sectional view of a heat exchange device according to an embodiment of the present disclosure.

Reference numerals in the specific embodiments are as follows:

1a vehicle is provided with a first vehicle,

a 10-cell battery is provided which has a battery,

the controller is configured to control the operation of the controller,

a 12 motor;

a 20-cell module is provided with a battery,

a 21-cell unit is provided, which comprises a plurality of battery cells,

211, 211a electrode terminals,

the housing 212 is configured to be coupled to the housing,

213 the electrode assembly,

a 22 f heat exchange device,

221, a bottom plate, A1 first chamber,

222, X1 first direction, 222a dividing plate, A2-second chamber, 222b heat conducting member,

223 ventilation part, 223a ventilation duct, 223b partition board, 223c connecting plate, X2 second direction, X3 third direction;

30, 301 first portion, 302 second portion.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

It should be noted that unless otherwise indicated, technical or scientific terms used in the embodiments of the present application should be given the ordinary meanings as understood by those skilled in the art to which the embodiments of the present application belong.

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

Furthermore, the technical terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or be integrated; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of embodiments of the present application, unless explicitly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediary. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

In the present application, the battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells, or magnesium ion battery cells, and the embodiment of the present application is not limited thereto. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separator. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive current collector comprises a positive current collecting part and a positive lug connected to the positive current collecting part, wherein the positive current collecting part is coated with a positive active material layer, and the positive lug is not coated with the positive active material layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode current collecting part and a negative electrode tab connected to the negative electrode current collecting part, wherein the negative electrode current collecting part is coated with a negative electrode active material layer, and the negative electrode tab is not coated with the negative electrode active material layer. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.

The inventors have noted that in the related art, the heat exchange scheme of the battery cell generally realizes heat exchange through a water cooling cycle, wherein the scheme of realizing heat exchange through the water cooling cycle has the risk of leakage.

In order to solve the problem that the battery monomer has the leakage risk through the scheme of water-cooling heat exchange, the applicant researches and discovers that the problem can be solved by improving the heat exchange path of the heat exchange device. Specifically put forward a heat transfer device for the free heat transfer of battery for this application, heat transfer device includes: a bottom plate, a partition portion and a ventilation portion. The battery unit can be arranged in the first cavity and supported on the bottom plate; the ventilation part is installed in the bottom plate one side that deviates from the partition portion, is provided with the ventilation wind channel on the ventilation part, and the air current can flow through the ventilation wind channel and with the bottom plate heat exchange.

Based on the above consideration, in order to solve the problems that the battery monomer is complex to assemble through the scheme of water-cooling heat exchange and has the risk of liquid leakage, the inventor has conducted intensive studies and designed a heat exchange device.

In such a heat exchange device, the heat exchange device includes a bottom plate, a partition portion, and a ventilation portion. The two separating parts and the bottom plate enclose to form a first chamber, and the battery unit can be arranged in the first chamber and supported on the bottom plate. The ventilation part is installed in the one side that the bottom plate deviates from the partition portion, is equipped with the ventilation wind channel on the ventilation part, and the air current can flow through the ventilation wind channel and carry out the heat exchange with the bottom plate. The battery monomer can need to exchange heat in the working process so as to maintain the temperature of the battery monomer within a preset temperature range, if the temperature of the battery monomer is higher than the preset temperature, the battery monomer needs to dissipate heat, and if the temperature of the battery monomer is lower than the preset temperature, the battery monomer needs to absorb heat. The battery monomer supports in the bottom plate and can carry out heat exchange with the bottom plate, and the wind of flowing through ventilation wind channel can carry out heat exchange with the bottom plate, and then can realize the free heat transfer of battery, and heat transfer device can satisfy the free heat management demand of battery, can avoid leaking the liquid phenomenon to take place simultaneously, improves the security performance.

The technical scheme described in the embodiment of the application is applicable to battery cells, batteries and power utilization devices.

The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric device in particular.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to the above-described battery and electric device, but may be applied to all batteries including a case and electric devices using the battery, but for brevity of description, the following embodiments are described by taking an electric vehicle as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1 according to some embodiments of the present application. The vehicle 1 can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extending vehicle. The battery 10 is provided in the interior of the vehicle 1, and the battery 10 may be provided at the bottom or at the head or at the tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, for example, the battery 10 may serve as an operating power source of the vehicle 1. The vehicle 1 may further comprise a controller 11 and a motor 12, the controller 11 being adapted to control the battery 10 to supply power to the motor 12, e.g. for operating power requirements during start-up, navigation and driving of the vehicle 1.

In some embodiments of the present application, the battery 10 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, providing driving power for the vehicle 1 instead of or in part instead of fuel oil or natural gas.

To meet different power requirements for use, the battery 10 may include a plurality of battery cells, which refers to the smallest units that make up a battery module or battery pack. Multiple cells may be connected in series and/or parallel via electrode terminals for use in various applications. The battery referred to in this application includes a battery module or a battery pack. The battery cells can be connected in series or parallel or in series-parallel connection, and the series-parallel connection refers to the mixture of series connection and parallel connection. In the embodiment of the application, a plurality of battery cells may directly form a battery pack, or may first form the battery module 20, and then form the battery pack from the battery module 20.

Fig. 2 is a schematic structural view of a battery pack according to an embodiment of the present application. Fig. 3 shows an exploded view of a battery pack according to an embodiment of the present application.

As shown in fig. 2 and 3, the battery includes a case and a battery cell (not shown) accommodated in the case.

The case 30 may have a simple three-dimensional structure such as a rectangular parallelepiped, a cylinder, or a sphere, or may have a complex three-dimensional structure formed by combining simple three-dimensional structures such as a rectangular parallelepiped, a cylinder, or a sphere, which is not limited in the embodiment of the present application. The material of the case 30 may be an alloy material such as an aluminum alloy or an iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin, which is not limited in this embodiment.

The box is used for holding the battery monomer, and the box can be multiple structure. In some embodiments, the case may include a first portion 301 and a second portion 302, the first portion 301 and the second portion 302 being overlapped with each other, the first portion 301 and the second portion 302 together defining a receiving space for receiving the battery cell. The second portion 302 may be a hollow structure with one end opened, the first portion 301 is a plate-shaped structure, and the first portion 301 covers the opening side of the second portion 302 to form a box body with an accommodating space; 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 is covered with the open side of the second portion 302, so as to form a box body with a containing space. Of course, the first portion 301 and the second portion 302 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.

To improve the tightness of the first portion 301 after the connection with the second portion 302, a sealing element, such as a sealant, a sealing ring, etc., may be disposed between the first portion 301 and the second portion 302.

Assuming that the first portion 301 is covered on top of the second portion 302, the first portion 301 may also be referred to as an upper case cover, and the second portion 302 may also be referred to as a lower case.

In the battery, the number of the battery cells may be one or more. If the number of the battery cells is multiple, the multiple battery cells can be connected in series or in parallel or in series-parallel connection, and the series-parallel connection means that the multiple battery cells are connected in series or in parallel. The plurality of battery monomers can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery monomers is accommodated in the box body; of course, a plurality of battery cells may be connected in series or in parallel or in series-parallel to form a battery module, and then the plurality of battery modules are connected in series or in parallel or in series-parallel to form a whole and are accommodated in the box body.

In some embodiments, as shown in fig. 3, a plurality of battery cells are provided, and the plurality of battery cells are connected in series, in parallel or in series-parallel to form a battery module. The battery modules are connected in series, in parallel or in series-parallel to form a whole and are accommodated in the box body.

The plurality of battery cells in the battery module can be electrically connected through the bus component so as to realize parallel connection, serial connection or series-parallel connection of the plurality of battery cells in the battery module.

In the present application, the battery cell 21 may include a lithium ion battery cell, a sodium ion battery cell, a magnesium ion battery cell, or the like, which is not limited in the embodiment of the present application. The battery cell 21 may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, etc., which is not limited in the embodiment of the present application. The battery cells 21 are generally divided into three types in a package manner: the cylindrical battery cells 21, the square battery cells 21, and the pouch battery cells 21 are not limited thereto. However, for simplicity of description, the following embodiments will be described by taking the square battery cell 21 as an example.

Fig. 4 is an exploded view of a battery cell 21 according to some embodiments of the present application. The battery cell 21 refers to the smallest unit constituting the battery. As shown in fig. 4, the battery cell 21 includes an end cap 211, a case 212, and an electrode assembly 213.

The end cap 211 refers to a member that is covered at the opening of the case 212 to isolate the inner environment of the battery cell 21 from the outer environment. Without limitation, the shape of the end cap 211 may be adapted to the shape of the housing 212 to fit the housing 212. Alternatively, the end cover 211 may be made of a material having a certain hardness and strength (such as an aluminum alloy), so that the end cover 211 is not easy to deform when being extruded and collided, so that the battery cell 21 can have a higher structural strength, and the safety performance can be improved. The end cap 211 may be provided with a functional member such as an electrode terminal 211 a. The electrode terminal 211a may be used to be electrically connected with the electrode assembly 213 for outputting or inputting electric power of the battery cell 21. In some embodiments, the end cap 211 may also be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold. The material of the end cap 211 may also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiments of the present application. In some embodiments, insulation may also be provided on the inside of the end cap 211, which may be used to isolate electrical connection components within the housing 212 from the end cap 211 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.

The case 212 is an assembly for mating with the end cap 211 to form an internal environment of the battery cell 21, wherein the formed internal environment may be used to accommodate the electrode assembly 213, an electrolyte (not shown in the drawings), and other components. The case 212 and the end cap 211 may be separate members, and an opening may be provided in the case 212, and the interior of the battery cell 21 may be formed by closing the opening with the end cap 211 at the opening. The end cap 211 and the housing 212 may be integrated, and specifically, the end cap 211 and the housing 212 may form a common connection surface before other components are put into the housing, and when the interior of the housing 212 needs to be sealed, the end cap 211 is covered with the housing 212. The housing 212 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 212 may be determined according to the specific shape and size of the electrode assembly 213. The material of the housing 212 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiments of the present application.

The electrode assembly 213 is a component in which an electrochemical reaction occurs in the battery cell 21. One or more electrode assemblies 213 may be contained within the housing 212. The electrode assembly 213 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode sheets having the active material constitute the main body portion of the electrode assembly, and the portions of the positive and negative electrode sheets having no active material constitute tabs (not shown in the drawings) respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected with the electrode terminal to form a current loop.

Referring to fig. 5 to 7, fig. 5 is a schematic perspective view of a heat exchange device according to an embodiment of the present application, fig. 6 is a schematic front sectional view of a heat exchange device according to an embodiment of the present application, and fig. 7 is a schematic side sectional view of a heat exchange device according to an embodiment of the present application.

The present application provides a heat exchange device 22, where the heat exchange device 22 may be integrated into the second portion 302 of the housing 30 of the battery 10 or disposed in the second portion 302 of the housing 30 of the battery 10 while leaving the vent 223 of the heat exchange device 22 open to allow airflow to pass therethrough for heat exchange.

The application provides a heat exchange device 22 for the heat transfer of battery monomer 21, heat exchange device 22 includes bottom plate 221, partition portion 222, ventilation portion 223. The two or more partitions 222 are disposed on the bottom plate 221 at intervals along the first direction X1, a first chamber A1 is formed by enclosing two adjacent partitions 222 with the bottom plate 221, and the battery cells 21 can be disposed in the first chamber A1 and supported on the bottom plate 221. The ventilation part 223 is installed at one side of the bottom plate 221 facing away from the partition part 222, and a ventilation air duct 223a is provided on the ventilation part 223, and air flow can flow through the ventilation air duct 223a and exchange heat with the bottom plate 221.

The separator 222 includes, but is not limited to, a solid plate-like structure, a hollow plate-like structure, or a frame structure.

The adjacent two separating parts 222 and the bottom plate 221 are enclosed to form a first chamber A1, the battery unit 21 can be arranged in the first chamber A1 and supported on the bottom plate 221, and the first chamber A1 is used for placing the battery unit 21.

The shape of the first chamber A1 may be matched with the shape of the battery cell 21 to be accommodated, and of course, may be larger than the volume of the battery cell 21, so that the accommodation of the battery cell 21 and the support of the bottom plate 22 to the battery cell 21 are both ensured.

The number of the dividing portions 222 is two, three or even more, and the number of the dividing portions 222 may be adjusted according to actual needs, which is not particularly limited herein.

The ventilation part 223 and the bottom plate 22 can be connected by adopting a fixed connection mode such as integral structure connection and welding or the like or a detachable connection mode of a fastener.

The number of ventilation air passages 223a provided in the ventilation portion 223 may be one or two or more, and when two or more ventilation air passages 223a may be provided independently of each other.

The embodiment of the application provides a heat transfer device, be provided with ventilation wind channel 223a on ventilation portion 223, battery monomer 21 in the course of the work, battery monomer 21 support in bottom plate 221 and can carry out the heat exchange with bottom plate 221, the wind of flowing through ventilation wind channel 223a can carry out the heat exchange with bottom plate 221, and then can realize the heat transfer of battery monomer 21. The heat transfer device that this application embodiment provided utilizes the air current that flows through ventilation duct 223a to realize the heat transfer of battery monomer 21, and heat exchange efficiency is high to heat transfer device 22 can satisfy the thermal management demand to battery monomer 21, can avoid the weeping phenomenon to take place simultaneously, improves the security performance.

In some embodiments, the number of ventilation air channels 223a is plural, and the plural ventilation air channels 223a are disposed independently from each other and extend along the second direction X2, and the second direction X2 is disposed intersecting the first direction X1.

The plurality of ventilation air channels 223a may be disposed on the same layer along the same direction, and of course, the plurality of ventilation air channels 223a may be disposed in a staggered manner or in a row-column arrangement. The angle between the second direction and the first direction may be 90 deg., but may of course be more or less than 90 deg., alternatively 90 deg..

The heat exchange device 22 provided in this embodiment of the present application, through setting up ventilation wind channel 223 a's quantity to be a plurality of, a plurality of ventilation wind channels 223a set up each other independently, can be favorable to the air current to evenly pass through ventilation wind channel 223a for battery cell 21 heat transfer is even.

Alternatively, the partitions 222 are spaced apart along a first direction X1, the first direction X1 being perpendicular to the bottom plate 221, and the second direction X2 being perpendicular to the first direction X1.

In some embodiments, the vent 223 includes a plurality of baffles 223b, a connecting plate 223c. The plurality of spacers 223b are distributed along the third direction X3. The connection plate 223c is connected between two adjacent partition plates 223b in the third direction X3, and a plurality of ventilation air channels 223a are formed by enclosing at least two of the partition plates 223b, the connection plate 223c and the bottom plate 221, and the third direction X3, the second direction X2 and the first direction X1 are mutually intersected.

Among them, the spacer 223b and the connection plate 223c include, but are not limited to, plate-like structures with flat surfaces, structures with concave-convex surfaces, and the like.

The number of the connection plates 223c between two adjacent separators 223b may be one or two or more, and the number of the connection plates 223c may be adjusted according to actual requirements, which is not particularly limited herein.

The separator 223b and the connecting plate 223c may be connected by a fixed connection manner such as an integral structure connection and an adhesive connection.

The partition plates 223b located at the side of the bottom plate 22 facing away from the partition portion 222 and the bottom plate 221 can enclose to form a ventilation air duct 223a, and the adjacent partition plates 223b and the connecting plates 223c located between the adjacent partition plates 223b can enclose to form a ventilation air duct 223a.

The connection plate 223c is connected between two adjacent separators 223b in the third direction X3, and at least two of the separators 223b, the connection plate 223c, and the bottom plate 221 are enclosed to form a plurality of ventilation air channels 223a, which may be rectangular parallelepiped air channels, cylindrical air channels, triangular prism air channels, or the like, and is not limited herein.

The included angle between the third direction X3 and the first direction X1 and the second direction X2 may be 90 ° or may be greater than or less than 90 °. Alternatively, the included angle is 90 °, the third direction X3 is parallel to the bottom plate 22, and the extending direction of the connection plate 223c coincides with the first direction X1.

According to the heat exchange device 22 provided by the embodiment of the application, the ventilation air duct 223a is divided into the small air ducts through the plurality of partition plates 223b and the connecting plate 223c, so that the air flow in the ventilation air duct 223a can uniformly flow, and the heat exchange is uniform.

In some embodiments, the plurality of ventilation air ducts 223a are layered along the third direction X3, each layer includes at least two ventilation air ducts 223a, at least one layer of ventilation air ducts 223a is configured to communicate with the temperature regulation apparatus, and the third direction X3, the second direction X2, and the first direction X1 are disposed to intersect each other.

Wherein, a plurality of ventilation wind channel 223a can divide into one deck, two-layer or even more layers, and at least one deck ventilation wind channel 223a is used for with temperature regulation and control equipment intercommunication, and in addition, another layer can with the outside intercommunication of power consumption device, also can with same or another temperature regulation and control equipment intercommunication, the user can select according to actual conditions. Optionally, the plurality of ventilation air channels 223a are arranged in two layers along the third direction X3, each layer includes at least two ventilation air channels 223a, the ventilation air channel 223a of the first layer is communicated with the temperature regulation apparatus, and the ventilation air channel 223a of the second layer is communicated with the outside of the electric device.

According to the heat exchange device 22 provided by the embodiment of the application, when heat exchange is needed through the battery monomer 21, at least one layer of ventilation air duct 223a can be communicated with temperature regulation equipment for heat exchange, and the temperature of the battery monomer 21 can be intelligently regulated in the heat exchange mode.

In some embodiments, the bottom plate 221 includes a heat exchange plate having a thermal conductivity greater than that of the partition 222.

Wherein the base 22 includes, but is not limited to, a solid plate-like structure, a hollow plate-like structure, or other structures.

The base 22 may be made of metal, organic, etc.

The bottom plate 22 may have a cavity filled with a heat exchange medium having high heat conductivity.

The heat exchange device 22 provided in the embodiment of the application has the heat conductivity greater than that of the partition portion 222 through the bottom plate 221, so that the bottom plate 221 is beneficial to guiding the heat generated by the battery cells 21 to the ventilation air duct 223a to facilitate heat exchange.

In some embodiments, base plate 221 includes a plate body, a body of phase change material. The phase change material body is provided in the plate body, and the phase change material body can exchange heat with the battery cells 21 and the ventilation part 223.

Wherein, the shape of the board body towards the first cavity A1 is consistent with the shape of the battery cell 21 contacted with the board body, and the size of the board body can be larger than that of the battery cell 21, so that the board body can support various batteries.

The inside cavity that can hold the phase change material body that can include of board body, the quantity of cavity can be one or more, and the shape of cavity can be cuboid shape, cylinder shape or other irregular shape etc. the phase change material body is filled in the cavity inside, and the inside cavity of board body keeps sealed state.

For example, the phase-change material body may be a solid-liquid phase-change material, for example, the phase-change material body is manganese nitrate hexahydrate, the phase-change material absorbs heat in the process of converting the solid state into the liquid state, the heat emitted by the battery cell 21 is taken away, the phase-change material body emits heat in the process of converting the liquid state into the solid state, the battery cell 21 absorbs the released heat, optionally, the phase-change material body is a solid-solid phase-change material, and the phase-change latent heat of the phase-change material body is more than 150KJ/kg, preferably a modified organic phase-change material or other materials.

The above is only to illustrate the relationship between the phase change and the heat change of the phase change material body, and other materials may be used as the phase change material body, for example, the phase change material body is n-heptadecane, dipotassium hydrogen phosphate tetrahydrate, capric acid-palmitate, etc.

The heat exchange device 22 provided by the embodiment of the application exchanges heat with the battery monomer 21 through the principle that the phase change material generates heat and absorbs heat in the phase change material phase transformation process, so that the energy consumption is reduced, the phase change material is low in price, the industrial application is mature, and the raw materials are easy to obtain.

In some embodiments, the partition 222 includes a divider plate 222a, a heat exchange medium. The partition plate 222a has a second chamber A2 therein. The heat exchange medium is provided in the second chamber A2, and the partition plate 222a can be attached to the battery cell 21 and exchange heat with the battery cell 21 and the heat exchange medium.

Wherein the separator plate 222a includes, but is not limited to, a plate-like structure, a column-like structure, a frame structure, and the like. The partition plate 222a may be made of metal, organic, or the like. The present invention is not particularly limited herein.

The inside of the partition plate 222a may further include a plurality of heat conductive members 222b for heat transfer.

The number of the second chambers A2 may be one, two or even more, and alternatively, the shape of the second chambers A2 is the same as the bonding surface of the battery cell 21.

The heat exchange medium can be an organic material with high heat conductivity or a phase change material body.

According to the heat exchange device 22 provided by the embodiment of the application, the second cavity A2 is arranged inside the partition plate 222a, and the second cavity A2 internally comprises a heat exchange medium, so that heat exchange is carried out on the portion, which is attached to the partition plate 222a, of the battery cell 21, and the heat exchange efficiency of the battery cell 21 is higher.

In some embodiments, the partition 222 further includes a plurality of heat conductive members 222b arranged at intervals along the first direction X1 in the second chamber A2 and connected to the partition plate 222 a.

Alternatively, the heat conducting members 222b may be arranged in staggered or row in the second chamber A2, and optionally, the extending direction of the heat conducting members 222b is consistent with the second direction X2, and the heat conducting members 222b are arranged along the first direction X1.

The shape of the heat conductive member 222b may be a straight bar, a serpentine shape, an arc shape, etc.

The connection between the heat conductive member 222b and the partition plate 222a may be a connection method such as welding, adhesion, magnetic attraction, or the like.

According to the heat exchange device 22 provided by the embodiment of the application, the heat of the battery cell 21 is favorably guided into the heat exchange medium in the second chamber A2 from the partition plate 222a by the heat conducting piece 222 b.

In some embodiments, the partition 222 is at least partially a unitary structure with the vent 223.

Wherein, the whole or part of the partition part 222 and the ventilation part 223 are integrated, and the partition part 222 filled with heat exchange medium is integrated with the ventilation part 223.

At least part of the partition 222 and the ventilation 223 may be welded or may be integrally produced therebetween, etc.

The heat exchange device 22 provided in the embodiment of the present application is beneficial to the tightness of the heat exchange device 22 by the sealing structure of at least part of the partition portion 222 and the ventilation portion 223.

Referring to fig. 5 to 7, the present application provides a heat exchange device 22, the heat exchange device 22 including a bottom plate 221, two or more partitions 222, and a ventilation portion 223. The partition parts 222 are disposed on the bottom plate 221 at intervals along the first direction X1, a first chamber A1 is formed by enclosing two adjacent partition parts 222 with the bottom plate 221, and the battery cells 21 can be disposed in the first chamber A1, wherein the first direction X1 is perpendicular to the bottom plate 221. The ventilation part 223 is located at one side of the bottom plate 221 facing away from the partition part 222, and is provided with a plurality of ventilation air channels 223a, the ventilation air channels 223a extend along a second direction X1, the second direction X2 is parallel to the extending direction of the bottom plate 221, the ventilation part 223 comprises a plurality of partition plates 223b and a connecting plate 223c, the plurality of partition plates 223b are parallel to the bottom plate 221, the connecting plate 223c is connected between two adjacent partition plates 223b in a third direction X3, the third direction X3 is parallel to the bottom plate 221, and the third direction X3 is perpendicular to the second direction X2. The ventilation duct 223a is divided into two layers, and at least one layer is communicated with the temperature regulating device. The bottom plate 221 includes a plate body and a phase change material body, and the phase change material body is located inside the plate body and is capable of performing heat exchange with the battery cells 21 and the ventilation duct 223 a. The portion of the partition 222 connected to the bottom plate 221 is integrally formed with the ventilation portion 223. The partition portion 222 includes a partition plate 222a, a heat exchange medium, and a plurality of heat conducting members 222b, the heat exchange medium is located inside the partition plate 222a, and the heat conducting members 222b are arranged inside the partition plate 222a along the first direction X1.

The present application provides a battery 10 comprising: the heat exchange device 22 in any of the above embodiments and the battery cell 21. The battery cell 21 is disposed in the first chamber A1 and supported by the bottom plate 221.

The battery 10 that this embodiment provided, through the battery monomer 21 in the battery 10 heat transfer through heat transfer device 22, heat transfer device 22 of battery 10 includes ventilation portion 223, and ventilation portion 223 is equipped with ventilation wind channel 223a, makes battery monomer 21 heat transfer through ventilation wind channel 223 a's air current, utilizes the air current that flows through ventilation wind channel 223a to realize battery monomer 21's heat transfer, and heat transfer efficiency is high. And the heat exchange device 22 can meet the thermal management requirement of the battery 10, and meanwhile, the phenomenon of liquid leakage can be avoided, so that the safety performance is improved. In addition, the heat exchange device is air-cooled heat exchange, and complicated pipeline setting of liquid-cooled heat exchange is eliminated, so that the battery 10 is simple to assemble and higher in integration.

In some embodiments, each battery cell 21 is sandwiched between two adjacent separators 222 and is in contact with the separators 222.

The number of battery cells 21 included in the battery may be one or more.

The first chamber A1 formed between the partitions 222 and the shape of the battery are matched with each other, and the first chamber A1 formed between the partitions 222 includes, but is not limited to, a rectangular parallelepiped shape, a cylindrical shape, a sheet shape, etc.

The battery provided by the embodiment of the application is beneficial to the export of the heat of the battery cell 21 by attaching the battery cell 21 and the partition 222.

The present application provides an electrical device comprising a battery 10 according to any of the embodiments described above, and the battery 10 is configured to provide electrical energy to the electrical device. The battery 10 includes a heat exchange device 22 and a battery cell 21.

The power consumption device that this application embodiment provided utilizes the air current that flows through ventilation duct 223a to realize the heat transfer of battery monomer 21 through battery 10, and heat exchange efficiency is high to the loaded down with trivial details pipeline setting of liquid cooling heat transfer has been cancelled, also makes the power consumption device assemble simply, integrates higher.

In some embodiments, the power plant further includes a temperature regulating device coupled to the ventilation portion 223 of the heat exchange device 22 to provide airflow to the ventilation air duct 223 a.

The temperature control device can be an air conditioner, a fan and the like.

The connection between the temperature control device and the ventilation part 223 may be a pipe connection, the temperature control device may be opened manually by a user, or a temperature sensor may be disposed on the battery cell 21, and the temperature sensor is electrically connected to the temperature control device, so that the temperature control device may be automatically opened when heat exchange is required.

When the number of ventilation air channels 223a is one, the temperature regulation device supplies the air flow to one ventilation air channel 223a, and when the number of ventilation air channels 223a is two or more, the air flow may be supplied to part or all of the ventilation air channels 223 a.

The power utilization device provided by the embodiment of the application can enable the temperature regulation and control equipment to be opened for heat exchange when the battery monomer 21 needs to be subjected to heat exchange through the connection of the temperature regulation and control equipment and the ventilation part 223, and is high in operability, safe and reliable.

In some embodiments, the power plant further comprises a temperature regulation compartment connected to the temperature regulation device, the air flow provided by the temperature regulation device being capable of flowing through the ventilation duct and the temperature regulation compartment in sequence.

The temperature adjusting cabin can be a cockpit used by a user, can be a cargo hold for storing cargoes, is not particularly limited herein, and can be adjusted according to specific conditions.

The temperature regulation cabin and the temperature regulation equipment can be connected through pipelines, or the temperature regulation equipment is arranged in the temperature regulation cabin.

For example, when the outdoor temperature is low in winter, the heat generated from the battery cell 21 may be introduced into the interior of the temperature regulation compartment by the temperature regulation apparatus.

The power consumption device provided by the embodiment of the application carries out cyclic utilization through the energy of the battery 10 and the energy in the temperature regulation cabin, is more environment-friendly, and reduces the energy loss.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A heat exchange device for heat exchange of a battery cell, the heat exchange device comprising:

A bottom plate;

the separation parts are arranged on the bottom plate at intervals along a first direction, a first cavity is formed by surrounding two adjacent separation parts and the bottom plate, and the battery unit can be arranged in the first cavity and supported on the bottom plate;

and the ventilation part is arranged on one side of the bottom plate, which is away from the separation part, and is provided with a ventilation air duct, and air flow can flow through the ventilation air duct and exchange heat with the bottom plate.

2. The heat exchange device of claim 1, wherein the number of ventilation ducts is plural, and the plural ventilation ducts are provided independently of each other and extend in second directions respectively, the second directions intersecting the first directions.

3. The heat exchange device of claim 2, wherein the ventilation portion comprises:

a plurality of separators distributed along a third direction;

a connection plate connected between adjacent two of the separators in the third direction,

the partition board, the connecting board and at least two of the bottom boards are enclosed to form a plurality of ventilation air channels, and the third direction, the second direction and the first direction are mutually intersected.

4. The heat exchange device of claim 2, wherein a plurality of said ventilation ducts are layered along a third direction, each layer comprising at least two of said ventilation ducts, at least one of said ventilation ducts being configured to communicate with a temperature regulating device, said third direction, said second direction and said first direction being disposed so as to intersect each other.

5. The heat exchange device of claim 1, wherein the base plate comprises a heat exchange plate having a thermal conductivity greater than a thermal conductivity of the partition.

6. The heat exchange device of claim 1, wherein the base plate comprises:

a plate body;

and the phase change material body is arranged in the plate body and can exchange heat with the battery cell and the ventilation part.

7. The heat exchange device of claim 1, wherein the partition comprises:

a partition plate having a second chamber inside;

the heat exchange medium is arranged in the second chamber,

the separator plate is capable of being bonded to the battery cell and exchanging heat with the battery cell and the heat exchange medium.

8. The heat exchange device of claim 7 wherein the partition further comprises:

The heat conducting pieces are arranged in the second chamber at intervals along the first direction and are connected with the partition plate.

9. The heat exchange device of any one of claims 1 to 8, wherein the partition is at least partially an integral structure with the ventilation.

10. A battery, comprising:

a heat exchange device as claimed in any one of claims 1 to 9;

and the battery unit is arranged in the first chamber and is supported by the bottom plate.

11. The battery of claim 10, wherein each of the battery cells is sandwiched between and in contact with two adjacent ones of the separators.

12. An electrical device, comprising: a battery as claimed in claim 10 or 11.

13. The electrical device of claim 12, further comprising:

and the temperature regulating and controlling equipment is connected with the ventilation part of the heat exchange device so as to provide air flow for the ventilation air duct.

14. The electrical device of claim 13, wherein the electrical device further comprises:

and the temperature regulation cabin is connected with the temperature regulation equipment, and air flow provided by the temperature regulation equipment can sequentially flow through the ventilation air duct and the temperature regulation cabin.