Heat exchange device, battery and electric equipment

Abstract

The utility model belongs to the technical field of battery heat exchange, and particularly relates to a heat exchange device, a battery and electric equipment.The heat exchange device comprises a heat exchange part and a power supply part, and the heat exchange part comprises an electric heating part used for heating a part to be subjected to heat exchange and an electric cooling part used for cooling the part to be subjected to heat exchange; the power supply part is electrically connected with the electric heating part and the electric cooling part through wires and used for supplying power to the electric heating part and the electric cooling part. The electric cooling parts are electrically connected with the power supply part through the wires, and the wires can be flexibly arranged in the box body to realize avoidance, so that the batteries can adopt heat exchange parts with the same structure, the types of the heat exchange parts in the batteries are reduced, and the manufacturing cost and the assembly efficiency of the batteries are favorably reduced.

Description

Technical Field

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

[0002] As the core component of the battery thermal management system, the heat exchange device exchanges heat with the battery cells in the battery, allowing the battery cells to operate within a suitable temperature range, which is beneficial to improving the battery's charging and discharging performance.

[0003] However, in actual batteries, there are many types of heat exchange components, the manufacturing cost of the battery is high, and the assembly efficiency of the battery is low.

[0004] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a heat exchange device, a battery and an electrical device, including but not limited to solving the problems in the related art of high battery manufacturing cost and low battery assembly efficiency due to the large variety of heat exchange components in the battery.

[0006] The technical solution adopted in the embodiment of the present application is:

[0007] In a first aspect, a heat exchange device is provided, which includes a heat exchange element and a power supply element, the heat exchange element including an electric heating element for heating the element to be heat exchanged and an electric cooling element for cooling the element to be heat exchanged; the power supply element is electrically connected to the electric heating element and the electric cooling element through a wire, and the power supply element is used to supply power to the electric heating element and the electric cooling element.

[0008] The heat exchange device of the embodiment of the present application, when in use, the power supply element energizes the electric heating element through the wire, so that the electric heating element heats the battery cell; the power supply element energizes the electric cooling element through the wire, so that the electric cooling element cools the battery cell, thereby realizing heat exchange of the battery cell; wherein, the electric cooling element and the electric cooling element are electrically connected to the power supply element through the wire, and the wire can be flexibly arranged in the box body to achieve avoidance, so that the battery can adopt the heat exchange element of the same structure, reducing the types of heat exchange elements in the battery, which is beneficial to reducing the manufacturing cost and assembly efficiency of the battery; in addition, the small space occupied by the wire is also beneficial to reducing the space occupied by the heat exchange device in the box body, which is beneficial to improving the volume energy density of the battery. At the same time, the flexible arrangement of the wire can also make full use of the space in the box body, further improving the volume energy density of the battery.

[0009] In one embodiment, the heat exchange element further comprises a shell, and at least a portion of the electric heating element and at least a portion of the electric cooling element are located in the shell.

[0010] By adopting the technical solution of this embodiment, the shell can protect the electric heating element and the electric cooling element, which can improve the reliability of the heat exchange element and is beneficial to improving the reliability of heat exchange of the battery cell.

[0011] In one embodiment, the shell is filled with a heat exchange medium.

[0012] By adopting the technical solution of this embodiment, under the heat transfer effect of the heat exchange medium, the heat of the electric heating element can be evenly transferred to the shell, and the heat of the shell can also be evenly transferred to the electric cooling element, which is beneficial to improving the uniformity of heat exchange of the battery cells, improving the heat exchange effect of the battery cells, and improving the charging and discharging performance of the battery.

[0013] In one embodiment, when the heat exchanging element is exchanging heat with the element to be heat exchanged, the electric heating element is located at the lower side of the electric cooling element.

[0014] By adopting the technical solution of this embodiment, the characteristics of hot heat exchange medium flowing upward and cold heat exchange medium flowing downward are utilized to balance the heat exchange performance of the heat exchange components, improve the uniformity of heat exchange of the heat exchange components, and improve the heat exchange effect of the battery cells.

[0015] In one embodiment, the heat exchange element also includes a bracket arranged in the shell, the electric heating element is installed on the bracket, and a first gap is formed between the electric heating element and the inner wall of the shell; and / or, the electric cooling element is installed on the bracket, and a second gap is formed between the electric cooling element and the inner wall of the shell.

[0016] By adopting the technical solution of this embodiment, the electric heating element and / or the electric cooling element are not in direct contact with the shell, reducing the risk of local overheating and local overcooling of the heat exchange element, which is beneficial to improving the heat exchange effect of the battery cell and improving the reliability of the battery cell.

[0017] In one embodiment, when both the electric cooling element and the electric heating element are mounted on a bracket, the bracket is provided with a first mounting hole and a second mounting hole arranged side by side, the electric heating element passes through the first mounting hole, and the electric cooling element passes through the second mounting hole.

[0018] By adopting the technical solution of this embodiment, the electric heating element and the electric cooling element are fixed in the shell by passing through the first mounting hole and the second mounting hole of the bracket, and the structure is simple and the processing and manufacturing are convenient; in addition, the first mounting hole and the second mounting hole are arranged side by side, so that after the electric heating element and the electric cooling element pass through the first mounting hole and the second mounting hole respectively, the electric heating element and the electric cooling element are arranged side by side, the structure of the heat exchange element is regular and simple, and the mutual influence between the electric heating element and the electric cooling element can also be reduced, thereby improving the heat exchange effect of the heat exchange element.

[0019] In one embodiment, there are multiple brackets, which are spaced apart along the length direction of the heat exchanger and divide the internal space of the shell into multiple subspaces; the heat exchanger has a connecting channel for connecting two adjacent subspaces.

[0020] By adopting the technical solution of this embodiment and the setting of the connecting channel, the heat exchange medium in two adjacent subspaces can flow to each other, so as to improve the uniformity of heat exchange of the heat exchange element.

[0021] In one embodiment, the connecting channel includes a connecting hole for connecting two adjacent subspaces, and the connecting hole is arranged on the bracket; and / or, the connecting channel also includes a connecting gap for connecting two adjacent subspaces, and a connecting gap is formed between the bracket and the inner wall of the shell.

[0022] By adopting the technical solution of this embodiment and setting the connecting holes and / or connecting gaps, the heat exchange component has a simple structure and is easy to manufacture while ensuring that the heat exchange medium in the two sub-spaces circulates with each other.

[0023] In one embodiment, the electric cooling element includes a cooling portion and a heat dissipation portion connected to each other, at least a portion of the cooling portion is located inside the housing, and the heat dissipation portion is located outside the housing.

[0024] By adopting the technical solution of this embodiment, when the battery cell is cooled by the shell, the cooling part of the electric cooling element is located inside the shell, so that the electric cooling element can have a good cooling effect on the battery cell; in addition, the heat dissipation part of the electric cooling element is located outside the shell, which can reduce the influence of the heat released by the heat dissipation part on the cooling of the battery cell, thereby improving the cooling effect of the battery cell.

[0025] In one embodiment, the electric cooling element is a semiconductor refrigerator; and / or the electric heating element includes an electric heating rod.

[0026] The adoption of the technical solution of this embodiment is helpful to simplify the structure of the heat exchange component and reduce the manufacturing cost.

[0027] In one embodiment, the wire includes a first wire, the electric heating element is provided with a first terminal exposed outside the shell, one end of the first wire is electrically connected to the first terminal, and the other end of the first wire is electrically connected to the power supply; and / or, the wire includes a second wire, the electric cooling element is provided with a second terminal exposed outside the shell, one end of the second wire is electrically connected to the second terminal, and the other end of the second wire is electrically connected to the power supply.

[0028] By adopting the technical solution of this embodiment, the electrical connection between the wire and the heat exchange element can be facilitated, and the assembly operation of the heat exchange device is simple and convenient.

[0029] In one embodiment, a rounded structure is provided at the edge of the shell.

[0030] By adopting the technical solution of this embodiment and setting the rounded structure, sharp edges can be reduced, scratches on assemblers and battery cells can be reduced, and safety of use can be improved.

[0031] In one embodiment, there are multiple electric heating elements, and there are multiple electric cooling elements, and the multiple electric heating elements and the multiple electric cooling elements are arranged alternately.

[0032] By adopting the technical solution of this embodiment, multiple electric heating elements and multiple electric cooling elements are alternately arranged, so that the heat exchange element has multiple heating and cooling effects, and the heat exchange effect of the battery cell is better.

[0033] In one embodiment, the heat exchange element has a heat exchange surface for exchanging heat with the element to be heat exchanged, and the plurality of electric heating elements and the plurality of electric cooling elements are alternately distributed in a direction parallel to the heat exchange surface.

[0034] By adopting the technical solution of this embodiment, multiple electric heating elements and multiple electric cooling elements are alternately distributed in a direction parallel to the heat exchange surface, which can improve the uniformity of the temperature distribution of the heat exchange surface of the heat exchange element and improve the heat exchange effect of the battery cell.

[0035] In one embodiment, the heat exchange device further comprises a temperature measuring element for detecting the temperature of the heat exchange element, and the power supply element is electrically connected to the temperature measuring element to control the cooling of the electric cooling element and / or the heating of the electric heating element.

[0036] By adopting the technical solution of this embodiment, through the cooperation of the power supply component and the temperature measuring component, intelligent temperature regulation of the battery cell can be achieved, the battery cell has a better heat exchange effect, the battery cell has better charging and discharging performance, which is beneficial to improving the performance of the battery.

[0037] In one embodiment, there are multiple heat exchange elements, and a receiving space for accommodating the heat exchange element is formed between two adjacent heat exchange elements.

[0038] By adopting the technical solution of this embodiment, after the battery cell is placed in the accommodation space, two adjacent heat exchange components can perform heat exchange on multiple positions of the battery cell, and the heat exchange effect of the battery cell is good.

[0039] In one embodiment, a plurality of heat exchange elements are arranged at intervals.

[0040] By adopting the technical solution of this embodiment, multiple heat exchange components are arranged at intervals, and the arrangement is simple, which is conducive to simplifying the structure of the heat exchange device and improving assembly efficiency.

[0041] In a second aspect, a battery is provided, comprising a battery cell and a heat exchange device as described in the above embodiment, wherein the part to be heat exchanged comprises the battery cell.

[0042] The battery of the embodiment of the present application adopts the above-mentioned heat exchange device, and the electric cooling element of the heat exchange element and the electric cooling element are electrically connected to the power supply element through a wire, and the wire can be flexibly arranged in the box to achieve avoidance, so that the battery can adopt a heat exchange element of the same structure, reducing the types of heat exchange elements in the battery, which is beneficial to reducing the manufacturing cost and assembly efficiency of the battery; in addition, the wire occupies a small space, which is also beneficial to reducing the space occupied by the heat exchange device in the box, which is beneficial to improving the volume energy density of the battery; at the same time, the flexible arrangement of the wire can also make full use of the space in the box, further improving the volume energy density of the battery

[0043] In one embodiment, the battery further comprises a casing, wherein the battery cells and at least a portion of the heat exchange element are located in the casing.

[0044] By adopting the technical solution of this embodiment, the box body can protect the battery cells and the heat exchange components, thereby improving the reliability of the battery.

[0045] In one embodiment, a first penetration hole is provided on the side wall of the box body, and the heat exchange element is penetrated through the first penetration hole; the electric cooling element includes a cooling part and a heat dissipation part connected to each other, at least part of the cooling part is located inside the box body, and the heat dissipation part is located outside the box body.

[0046] By adopting the technical solution of this embodiment, the heat dissipation part is located outside the box body, and the heat emitted by the heat dissipation part has little effect on the cooling of the battery cells in the box body, and the heat exchange effect of the battery cells is good; in addition, the airflow outside the box body can be used to take away the heat of the heat dissipation part, thereby achieving good heat dissipation of the heat dissipation part and improving the cooling effect of the electric cooling component; at the same time, the heat dissipation part does not occupy the internal space of the box body, which is beneficial to improving the energy density of the battery, and does not require a structure inside the box body, which is also beneficial to reducing the types of heat exchange components.

[0047] In one embodiment, the width of the first through hole is H1, and the thickness of the heat exchange element is H2, wherein 0.9≤H2 / H1≤1.1.

[0048] By adopting the technical solution of this embodiment, the design of 0.9≤H2 / H1≤1.1, the thickness of the heat exchanger is not much different from the hole width of the first through hole, and the hole wall of the first through hole can play a certain supporting and limiting role on the side wall of the heat exchanger to fix the heat exchanger. At the same time, it plays a positioning role for the heat exchanger during the assembly process of the battery, thereby simplifying the assembly operation and reducing the production cost.

[0049] In one embodiment, 0.95≤H2 / H1≤1.05.

[0050] By adopting the technical solution of this embodiment, the design of 0.95≤H2 / H1≤1.05, the thickness of the heat exchanger is relatively close to the hole width of the first through hole, and the hole wall of the first through hole can play a good supporting and limiting role on the side wall of the heat exchanger to fix the heat exchanger. At the same time, it plays a positioning role for the heat exchanger during the assembly process of the battery, simplifies the assembly operation, and reduces the production cost.

[0051] In one embodiment, a second through hole is provided on the side wall of the box body, the power supply is located in the box body, and the wire is passed through the second through hole; the wire includes a first wire, the electric heating element is provided with a first terminal exposed outside the box body, one end of the first wire is electrically connected to the first terminal, and the other end of the first wire is electrically connected to the power supply; and / or, the wire includes a second wire, the electric cooling element is provided with a second terminal exposed outside the box body, one end of the second wire is electrically connected to the second terminal, and the other end of the second wire is electrically connected to the power supply.

[0052] By adopting the technical solution of this embodiment, the first terminal and / or the second terminal are located outside the box, so that the first terminal and / or the second terminal do not need to undergo structural changes to avoid the structure inside the box and adapt to the arrangement of the battery cells, which can reduce the types of heat exchange components; in addition, the first wire and / or the second wire can be routed from the outside of the box, which can reduce the space occupied by the box, which is beneficial to improving the volume energy density of the battery.

[0053] In one embodiment, the battery includes a control component for controlling the charging and discharging of the battery cells, and the power supply component includes the control component.

[0054] By adopting the technical solution of this embodiment, the control component in the battery is directly used as the power supply component without adding additional components, which is beneficial to saving space and manufacturing costs.

[0055] In one embodiment, there are multiple heat exchange elements, and there are multiple battery cells. The multiple battery cells are divided into multiple columns of battery cells, and at least one column of battery cells is provided between two adjacent heat exchange elements.

[0056] By adopting the technical solution of this embodiment, the arrangement of multiple heat exchange components can meet the heat exchange requirements of multiple battery cells.

[0057] In a third aspect, an electrical device is provided, comprising the heat exchange device as described in the above embodiment, and / or comprising the battery as described in the above embodiment.

[0058] The electrical equipment of the embodiment of the present application adopts the above-mentioned heat exchange device, which is beneficial to reducing the manufacturing cost, saving internal space, improving the compactness of the structure of the electrical equipment and improving the performance of the electrical equipment.

[0059] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0061] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0062] Figure 2 Schematic diagram of the exploded structure of a battery provided in some embodiments of the present application.

[0063] Figure 3 Schematic diagram of the structure of batteries provided in other embodiments of the present application.

[0064] Figure 4 for Figure 3 Schematic diagram of the exploded structure of the battery shown in FIG.

[0065] Figure 5 for Figure 4 A schematic structural diagram of a heat exchanger from one perspective is shown in FIG.

[0066] Figure 6 for Figure 5 An exploded schematic diagram of the heat exchange component is shown.

[0067] Figure 7 for Figure 6 Schematic diagram of the structure of the bracket shown in .

[0068] Figure 8 for Figure 5 A schematic structural diagram of the heat exchange element from another perspective is shown.

[0069] Fig. 9 For along Figure 8 Sectional view along line AA.

[0070] Fig.10 For along Figure 8 Sectional view along the midline BB.

[0071] Fig.11 for Fig.10 A partial enlarged view of point C in the middle.

[0072] Fig.12 A schematic diagram of an exploded view of a heat exchange component provided in some embodiments of the present application.

[0073] Among them, the reference numerals in the figure are:

[0074] 1000, vehicle; 1100, battery; 1200, controller; 1300, motor; 100, heat exchange device; 1001, accommodation space; 10, heat exchange element; 101, heat exchange surface; 102, first gap; 103, second gap; 11, electric heating element; 111, first terminal; 12, electric cooling element; 121, cooling part; 122, heat dissipation part; 123, second terminal; 13, housing; 131, subspace; 132, rounded structure; 133, first opening; 134, second opening; 14, bracket; 141, first mounting hole; 142, second mounting hole; 15, communication channel; 151, communication hole; 152, communication gap; 20, power supply; 30, wire; 31, first wire; 32, second wire; 40, third wire; 200, battery cell; 300, box; 310, first part; 320, second part; 301, first through hole; 302, second through hole; 400, control member; DETAILED DESCRIPTION

[0075] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0076] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0077] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0078] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0079] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0080] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces). "Several" means one or more than one, unless otherwise clearly and specifically defined.

[0081] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0082] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0083] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0084] At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0085] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells to a certain extent.

[0086] In a battery, when there are multiple battery cells, the multiple battery cells can be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells is accommodated in a box; of course, the battery can also be a battery module formed by connecting multiple battery cells in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in a box. The battery can also include other structures. For example, the battery can also include a busbar component for realizing electrical connection between multiple battery cells.

[0087] The battery cell in the embodiment of the present application includes an electrode assembly and a housing, and the electrode assembly is installed in the housing to protect the electrode assembly through the housing.

[0088] The electrode assembly consists of a positive electrode sheet, a negative electrode sheet and a separator. The electrode assembly 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 part of the positive electrode collector that is not coated with the positive electrode active material layer protrudes from the part that is coated with the positive electrode active material layer. The part that is not coated with the positive electrode active material layer serves as the positive electrode tab, or a metal conductor is welded on the positive electrode collector and led out to serve as the positive electrode tab. Taking lithium-ion batteries 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 includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The portion of the negative electrode current collector that is not coated with the negative electrode active material layer protrudes from the portion that is coated with the negative electrode active material layer. The portion that is not coated with the negative electrode active material layer serves as a negative electrode tab, or a metal conductor is welded and led out on the negative electrode current collector to serve as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current is passed without melting to a certain extent, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. It can be understood that in the electrode assembly, the number of positive electrode tabs may be one, and the number of negative electrode tabs may also be one. That is, two groups of tabs are provided on the electrode assembly, each group includes at least one tab, and one group of tabs is a positive electrode tab, and the other group of tabs is a negative electrode tab.

[0089] The electrode assembly can be a wound structure or a laminated structure. The embodiments of the present application are not limited to this. The wound structure is mostly to weld the pole ear to the current collector, and then arrange it in the order of positive electrode sheet-diaphragm-negative electrode sheet-diaphragm; and then wind it to form a cylindrical or square battery cell. The laminated structure is mostly to lead the pole ear on the current collector, arrange the positive electrode sheet, negative electrode sheet and diaphragm in the order of positive electrode sheet-diaphragm-negative electrode sheet-diaphragm, and stack them layer by layer to form a laminated battery cell; wherein, the diaphragm can be cut and directly laminated with the diaphragm sheet, or the diaphragm is not cut, but laminated in a Z-shaped fold. The material of the diaphragm can be PP (Polypropylene, polypropylene) or PE (Polyethylene, polyethylene), etc. The diaphragm is an insulating film arranged between the positive electrode sheet and the negative electrode sheet. Its main function is to isolate the positive and negative electrodes and prevent the electrons in the battery from passing freely, to prevent short circuits to a certain extent, and to allow the ions in the electrolyte to pass freely between the positive and negative electrodes to form a loop between the positive and negative electrodes. The positive electrode sheet and the negative electrode sheet are collectively referred to as the electrode sheet. The positive electrode tab and the negative electrode tab are collectively referred to as the tab.

[0090] The shell refers to a shell structure with space inside to accommodate and protect the electrode assembly. The shell can be made of a material with a certain hardness and strength, so that the shell is not easily deformed when squeezed or collided, so that the battery cell can have a higher structural strength and improved reliability. The shell can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0091] The outer shell of the battery cell will be provided with electrode terminals. Electrode terminals refer to conductive parts provided on the outer shell. Electrode terminals are connected to the tabs of the electrode assembly to output the electric energy of the battery cell or charge the battery cell. A battery cell generally has two electrode terminals, which are respectively connected to the positive and negative tabs of the electrode assembly. The electrode terminal connected to the positive tab is the positive electrode terminal, and the electrode terminal connected to the negative tab is the negative electrode terminal. The electrode assembly is connected to the electrode terminals to form a battery cell.

[0092] When the battery cell is charged, the current converts electrical energy into chemical energy through the chemical reaction between the electrolyte and the electrode and stores it in the battery cell. During the discharge process, the chemical energy is converted into electrical energy and released. This energy conversion process is accompanied by energy loss and heat generation. If the heat dissipation inside the battery cell is poor and the heat cannot be effectively dissipated, the battery cell will overheat. There is a certain internal resistance inside the battery cell. When the current passes through the internal resistance, resistance loss will be generated, causing the battery cell to heat up. When the current is too large or the internal resistance is too high, the heat inside the battery cell will increase, causing the battery cell to overheat. If the battery cell exceeds its designed maximum voltage during charging, or the battery cell voltage drops too low during discharge, it will cause the battery cell to overvoltage or overdischarge. Overcharging or overdischarging will cause the chemical reaction inside the battery cell to run away, generate too much heat, and cause the battery cell to overheat. In addition, there may be defects in the design or manufacturing process of the battery cell, such as improper material selection, poor battery cell assembly, etc. These defects may lead to poor heat dissipation inside the battery cell or uneven current distribution, thereby increasing the risk of overheating or overvoltage of the battery cell. Therefore, the battery cells may overheat or over-voltage during charging or use.

[0093] A certain amount of gas is usually contained inside a battery cell. When the battery cell is charged or discharged, the solution in the electrolyte will produce or absorb gas. The generation of these gases will cause the gas pressure inside the battery cell to increase, causing the battery cell to swell and deform. During the charging or discharging process of the battery cell, the positive and negative electrode materials will undergo chemical reactions to form new compounds. These chemical reactions are accompanied by changes in volume, which cause the volume of the internal materials of the battery cell to change, causing the battery to swell and deform. When the battery cell is overcharged or over-discharged, the chemical reaction inside the battery cell will get out of control, generating too much gas or causing the structure of the electrode material to be damaged, which will cause the battery cell to swell and deform. Charging or discharging the battery cell in a high temperature environment will accelerate the internal chemical reaction, increase gas generation and volume changes. High temperature will also cause the internal materials of the battery cell to expand, which also causes the battery cell to swell and deform.

[0094] In order to reduce the risk of explosion or fire caused by overheating or overpressure of battery cells during charging or use, pressure relief mechanisms such as explosion-proof valves and explosion-proof plates are often installed on the outer shell of battery cells so that when the temperature or pressure of the battery cells exceeds the safety threshold, the gas or liquid inside the battery cells can be released to relieve the pressure inside the battery cells and reduce the risk of battery cell explosion. This can improve the safety performance of battery cells and reduce potential safety risks.

[0095] Batteries are widely used in various electronic devices, including mobile phones, laptops, battery cars, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes and power tools, etc. Batteries are devices that can store electrical energy and release electrical energy to provide the required power for these electronic devices.

[0096] As the core component of the battery thermal management system, the heat exchange device exchanges heat with the battery cells in the battery, allowing the battery cells to operate within a suitable temperature range, which is beneficial to improving the battery's charging and discharging performance.

[0097] In some cases, a channel is provided in the heat exchange component, and a heat exchange medium flows in the channel, thereby realizing heat exchange of multiple battery cells. Usually, there are multiple heat exchange components, and pipes are connected between the multiple heat exchange components to connect the channels in the multiple heat exchange components, and enable the heat exchange medium to flow through the multiple heat exchange components to realize heat exchange of multiple battery cells. However, in actual batteries, according to the arrangement of battery cells and the distribution of horizontal and vertical beams in the box, there are multiple positions and shapes of interfaces between the heat exchange components and the pipes for the purpose of avoidance, resulting in the battery having multiple heat exchange plates, many types of heat exchange plates, high battery production costs, and low battery assembly efficiency.

[0098] Based on this, an embodiment of the present application provides a heat exchange device, which includes a heat exchange component and a power supply component, the heat exchange component includes an electric heating component and an electric cooling component, the electric heating component and the electric cooling component are electrically connected to the power supply component through a wire, so as to realize heat exchange of the heat exchange component; wherein the wire can be flexibly arranged to achieve avoidance, so that the battery can adopt the heat exchange component of the same structure, reducing the types of heat exchange components in the battery, which is beneficial to reducing the manufacturing cost and assembly efficiency of the battery.

[0099] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical equipment using batteries.

[0100] Electrical equipment may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, and the like. Spacecraft include airplanes, rockets, space shuttles, and spacecrafts, and the like; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment. Batteries may also be energy storage devices. Energy storage devices include energy storage containers, energy storage cabinets, and the like.

[0101] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in some embodiments of the present application.

[0102] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1100 is provided inside the vehicle 1000, and the battery 1100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 1100 may be used to power the vehicle 1000, for example, the battery 1100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300, and the controller 1200 is used to control the battery 1100 to power the motor 1300, for example, for starting, navigating and driving the vehicle 1000.

[0103] In some embodiments of the present application, the battery 1100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0104] Please refer to Figure 2 , Figure 2 Schematic diagram of the exploded structure of the battery 1100 provided for some embodiments of the present application. The battery 1100 includes a box 300 and a battery cell 200, and the battery cell 200 is contained in the box 300. Among them, the box 300 is used to provide a storage space for the battery cell 200, and the box 300 can adopt a variety of structures. In some embodiments, the box 300 may include a first part 310 and a second part 320, and the first part 310 and the second part 320 cover each other, and the first part 310 and the second part 320 jointly define a storage space for accommodating the battery cell 200. The second part 320 can be a hollow structure with one end open, and the first part 310 can be a plate-like structure, and the first part 310 covers the open side of the second part 320, so that the first part 310 and the second part 320 jointly define a storage space; the first part 310 and the second part 320 can also be hollow structures with one side open, and the open side of the first part 310 covers the open side of the second part 320. Of course, the box body 300 formed by the first part 310 and the second part 320 can be in various shapes, such as a cylinder, a cuboid, etc.

[0105] See also Figures 3 to 6 As shown, Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. Figure 2 Schematic diagram of the exploded structure of a battery 1100 provided in some embodiments of the present application. Figure 3 A schematic diagram of the structure of a battery 1100 provided in some other embodiments of the present application. Figure 4 for Figure 3 Schematic diagram of the exploded structure of battery 1100 shown in FIG. Figure 5 for Figure 4 A schematic structural diagram of a heat exchange element 10 from one perspective is shown in FIG. Figure 6 for Figure 5 An exploded schematic diagram of the heat exchange element 10 is shown.

[0106] See also Figure 3 and Figure 4 As shown, the battery 1100 further includes a heat exchange device 100 , which is used to exchange heat with the battery cell 200 to control the temperature of the battery cell 200 within a suitable range, improve the charge and discharge performance of the battery cell 200 , and thus improve the performance of the battery 1100 .

[0107] See also Figures 3 to 6As shown, in some embodiments of the present application, a heat exchange device 100 is provided, including a heat exchange element 10 and a power supply element 20, the heat exchange element 10 includes an electric heating element 11 and an electric cooling element 12, the electric heating element 11 is used to heat the electric heating element 11 of the heat exchange element, and the electric cooling element 12 is used to cool the electric cooling element 12 of the heat exchange element; the power supply element 20 is electrically connected to the electric heating element 11 and the electric cooling element 12 through a wire 30, and the power supply element 20 is used to supply power to the electric heating element 11 and the electric cooling element 12.

[0108] For the convenience of explanation, the heat-exchanged component is taken as a battery cell 200 as an example for explanation. Of course, the heat-exchanged component in the embodiment of the present application may also be other components that need to be heated and / or cooled.

[0109] The heat exchanger 10 may refer to a component that exchanges heat with the battery cell 200. The heat exchanger 10 may have various structures, such as a plate-like structure, a tubular structure, and the like.

[0110] The heat exchange element 10 includes an electric heating element 11 and an electric cooling element 12. The electric heating element 11 may refer to a component that can convert electrical energy into thermal energy, that is, the electric heating element 11 can release heat after being powered on to achieve heating of the battery cell 200; as an example, the electric heating element 11 may be a heating rod, a heating wire, an electric heating tube, an electric heating plate, an electric heating film, etc.

[0111] The electric cooling element 12 may be a component that uses electrical energy to achieve a cooling effect, that is, the electric cooling element 12 can absorb the heat of the battery cell 200 after being powered on, thereby cooling the battery cell 200. As an example, the electric cooling element 12 may be, but is not limited to, a semiconductor refrigerator.

[0112] The power supply 20 may refer to a component that provides electric energy. The power supply 20 is electrically connected to the electric heating component 11 through the wire 30. The power supply 20 transmits electric energy to the electric heating component 11 through the wire 30. After the electric heating component 11 is electrically conductive, the battery cell 200 is heated. The power supply 20 may also be electrically connected to the electric cooling component 12 through the wire 30. The power supply 20 transmits electric energy to the electric cooling component 12 through the wire 30. After the electric cooling component 12 is electrically conductive, the battery cell 200 is cooled to achieve heat exchange of the battery cell 200, so as to control the temperature of the battery cell 200 within a suitable range, improve the charging and discharging performance of the battery cell 200, and improve the performance of the battery 1100. Among them, the power supply 20 may refer to a power source external to the battery 1100, or may refer to a component such as a plug connected to a power source external to the battery 1100. The power supply 20 may also refer to a battery cell inside the battery 1100 , or may refer to a component inside the battery 1100 that is electrically connected to the battery cell 200 , such as a battery management system (BMS for short).

[0113] The wire 30 may refer to a wire used to conduct electrical energy; wherein, the number of the wire 30 may be one, one end of the wire 30 is electrically connected to the power supply 20, and the other end of the wire 30 is electrically connected to the electric heating element 11 and the electric cooling element 12 at the same time; the number of the wire 30 may also be two, one of the wires 30 is electrically connected to the electric heating element 11 and the power supply 20, and the other wire 30 is electrically connected to the electric cooling element 12 and the power supply 20; wherein, the two wires 30 may be integrated into one wire; the wire 30 may be but is not limited to an electric wire, a cable, or a wiring harness.

[0114] In the heat exchange device 100 of the embodiment of the present application, when in use, the power supply 20 supplies electricity to the electric heating element 11 through the wire 30, so that the electric heating element 11 heats the battery cell 200; the power supply 20 supplies electricity to the electric cooling element 12 through the wire 30, so that the electric cooling element 12 cools the battery cell 200, thereby achieving heat exchange of the battery cell 200; wherein the electric cooling element 12 and the electric cooling element 12 are electrically connected to the power supply 20 through the wire 30, and the wire 30 can be flexibly arranged in the box 300, so as to achieve Avoidance allows the battery 1100 to use a heat exchange component 10 with the same structure, reducing the types of heat exchange components 10 in the battery 1100, which is beneficial to reducing the production cost and assembly efficiency of the battery 1100; in addition, the wire 30 occupies a small space, which is also beneficial to reducing the space occupied by the heat exchange device 100 in the box body 300, which is beneficial to improving the volume energy density of the battery 1100. At the same time, the flexible arrangement of the wire 30 can also make full use of the space in the box body 300, further improving the volume energy density of the battery 1100.

[0115] In addition, in the case of multiple heat exchange components 10, heat exchange of the battery cell 200 is achieved through the electric heating component 11 and the electric cooling component 12, so that the heat exchange components 10 do not need to be connected by using structures such as pipes, and components such as pipes inside and outside the battery 1100 for transporting heat exchange media can be omitted, which can save components and reduce production costs, which is beneficial to improving the space utilization of the battery 1100 and reducing the cost and volume of electrical equipment using the battery 1100.

[0116] In some embodiments, the heat exchange element 10 can be disposed at the top of the battery cell 200 to achieve top heat exchange of the battery cell 200; the heat exchange element 10 can also be disposed at the bottom of the battery cell 200 to achieve bottom heat exchange of the battery cell 200; the heat exchange element 10 can also be disposed between two adjacent battery cells 200 to achieve side heat exchange of the battery cell 200.

[0117] In another embodiment of the present application, see Figure 5 and Figure 6 As shown, the heat exchange element 10 further includes a shell 13 , and at least a portion of the electric heating element 11 and at least a portion of the electric cooling element 12 are located in the shell 13 .

[0118] The shell 13 may refer to a hollow component, and the cavity formed by the hollow interior of the shell 13 may be used to provide installation space for the electric heating element 11 and the electric cooling element 12. At least part of the electric heating element 11 is located in the shell 13. It can be understood that a part of the electric heating element 11 is located in the shell 13, and another part is located outside the shell 13, or the entire electric heating element 11 is located in the shell 13; at least part of the electric cooling element 12 is located in the shell 13. It can be understood that a part of the electric cooling element 12 is located in the shell 13, and another part is located outside the shell 13, or the entire electric cooling element 12 is located in the shell 13; of course, the material of the shell 13 can be made of a material with a good thermal conductivity, such as aluminum, aluminum alloy, etc. The shape of the shell 13 can be a variety of shapes, such as a cylinder, a cuboid, etc.

[0119] By adopting the technical solution of this embodiment, the shell 13 can protect the electric heating element 11 and the electric cooling element 12, which can improve the reliability of the heat exchange element 10 and help improve the reliability of heat exchange of the battery cell 200.

[0120] In another embodiment of the present application, the shell 13 is filled with a heat exchange medium.

[0121] The heat exchange medium may refer to a substance that transfers heat during the heat exchange process. The heat exchange medium transfers heat between the electric heating element 11 and the shell 13, so that the heat is transferred from the electric heating element 11 to the shell 13, and then transferred to the battery cell 200 through the shell 13, thereby achieving the heating of the battery cell 200; the heat exchange medium transfers heat between the electric cooling element 12 and the shell 13, the heat of the battery cell 200 is transferred to the shell 13, and the heat of the shell 13 is then transferred to the electric cooling element 12 through the heat exchange medium, and finally the electric cooling element 12 takes away the heat, thereby achieving the cooling of the battery cell 200. The heat exchange medium may be a liquid, a gas or a solid, and the heat exchange medium may be, but is not limited to, air, water, coolant, etc.

[0122] By adopting the technical solution of this embodiment, under the heat transfer effect of the heat exchange medium, the heat of the electric heating element 11 can be evenly transferred to the shell 13, and the heat of the shell 13 can also be evenly transferred to the electric cooling element 12, which is beneficial to improve the uniformity of heat exchange of the battery cell 200, improve the heat exchange effect of the battery cell 200, and improve the charging and discharging performance of the battery 1100.

[0123] In addition, in the case of multiple heat exchange elements 10, heat is exchanged with the heat exchange medium through the electric heating element 11 and the electric cooling element 12, so that the heat exchange elements 10 do not need to be connected by structures such as pipes, and components such as pipes inside and outside the battery 1100 for transporting the heat exchange medium can also be omitted, thereby saving components and reducing production costs, which is beneficial to improving the space utilization of the battery 1100 and reducing the cost and volume of electrical equipment using the battery 1100.

[0124] In another embodiment of the present application, see Figure 6 As shown, when the heat exchange element 10 is exchanging heat with the element to be heat exchanged, the electric heating element 11 is located at the lower side of the electric cooling element 12 .

[0125] It is understandable that the heat exchange state of the heat exchange element 10 (see Figure 3 In the state shown in the figure), the electric heating element 11 is located at the lower side of the electric cooling element 12, that is, the electric cooling element 12 is located at the upper side of the electric heating element 11.

[0126] For example, see Figure 6 As shown, the heat exchanger 10 is a flat plate structure. The heat exchanger 10 has a height direction, a length direction and a thickness direction. The height direction of the heat exchanger 10 can refer to the Z direction, the thickness direction of the heat exchanger 10 can refer to the X direction, and the length direction of the heat exchanger 10 can refer to the Y direction. The length of the heat exchanger 10 can be longer or shorter than the thickness. The shell 13 defines the outer structure of the heat exchanger 10. The height direction of the shell 13 is the height direction of the heat exchanger 10, the length direction of the shell 13 is the length direction of the heat exchanger 10, and the thickness direction of the shell 13 is the thickness direction of the heat exchanger 10.

[0127] The electric heating element 11 and the electric cooling element 12 are arranged up and down along the height direction of the heat exchange element 10, and the electric heating element 11 is located below the electric cooling element 12. This arrangement allows the heat exchange element 10 to exchange heat for all battery cells 200 arranged along the length direction of the heat exchange element 10, reducing heat exchange blind spots and improving the reliability of the battery 1100.

[0128] During heating, the heat exchange medium with a higher temperature will spontaneously flow upward, so that the upper part of the heat exchange element 10 has a better heating effect. At the same time, the electric heating element 11 is located on the lower side of the electric cooling element 12, and the lower side of the heat exchange element 10 also has a better heating effect. This can reduce the temperature difference between the upper and lower sides of the heat exchange element 10, which is beneficial to improve the uniformity of heating the heat exchange element 10, and the heating effect of the battery cell 200 is good; during cooling, the heat exchange medium with a lower temperature will spontaneously flow downward, so that the lower part of the heat exchange element 10 has a good cooling effect; at the same time, the electric heating element 11 is located on the lower side of the electric cooling element 12, and the upper side of the heat exchange element 10 also has a good cooling effect. This can reduce the temperature difference between the upper and lower sides of the heat exchange element 10, which is beneficial to improve the uniformity of cooling the heat exchange element 10, and the cooling effect of the battery cell 200 is good.

[0129] By adopting the technical solution of this embodiment, the characteristics of hot heat exchange medium flowing upward and cold heat exchange medium flowing downward are utilized to balance the heat exchange performance of the heat exchange element 10, improve the uniformity of heat exchange of the heat exchange element 10, and improve the heat exchange effect of the battery cell 200.

[0130] Please also read Figure 7 to Figure 11 As shown, Figure 7 for Figure 6 A schematic structural diagram of the bracket 14 is shown in FIG. Figure 8 for Figure 5 The heat exchange element 10 is shown in a schematic structural diagram from another perspective. Fig. 9 For along Figure 8 Sectional view along line AA. Fig.10 For along Figure 8 Sectional view along the midline BB. Fig.11 for Fig.10 A partial enlarged view of point C in the middle.

[0131] In another embodiment of the present application, see Figure 8 and Fig. 9 As shown, the heat exchange element 10 also includes a bracket 14, the bracket 14 is arranged in the shell 13, the electric heating element 11 is installed on the bracket 14, and a first gap 102 is formed between the electric heating element 11 and the inner wall of the shell 13; and / or, the electric cooling element 12 is installed on the bracket 14, and a second gap 103 is formed between the electric cooling element 12 and the inner wall of the shell 13.

[0132] The support 14 may refer to a component in the housing 13 for supporting the electric heating element 11 and / or the electric cooling element 12. The support 14 is located in a cavity formed by the housing 13, and the material of the support 14 may be a metal support 14 or a plastic support 14.

[0133] The electric heating element 11 is mounted on the bracket 14, and a first gap 102 is formed between the electric heating element 11 and the inner wall of the shell 13. It can be understood that after the electric heating element 11 is mounted on the bracket 14, at least one side of the electric heating element 11 forms the first gap 102 with the side wall corresponding to the shell 13, so that at least one side of the electric heating element 11 is not in direct contact with the shell 13. As an example, the outer wall of the electric heating element 11 is spaced from the inner wall of the shell 13, so that the electric heating element 11 is suspended in the shell 13, that is, the electric heating element 11 is not in direct contact with the shell 13 at all.

[0134] The electric cooling element 12 is mounted on the bracket 14, and a second gap 103 is formed between the electric cooling element 12 and the inner wall of the housing 13; it can be understood that after the electric cooling element 12 is mounted on the bracket 14, at least one side of the electric cooling element 12 forms a second gap 103 with the side wall corresponding to the housing 13, so that at least one side of the electric cooling element 12 is not in direct contact with the housing 13. As an example, the outer wall of the electric cooling element 12 is spaced from the inner wall of the housing 13, so that the electric cooling element 12 is suspended in the housing 13, that is, the electric cooling element 12 is not in direct contact with the housing 13 at all.

[0135] In a possible embodiment, the heat exchange element 10 also includes a bracket 14 arranged in the shell 13, and the electric heating element 11 is installed on the bracket 14, and a first gap 102 is formed between the electric heating element 11 and the inner wall of the shell 13; the bracket 14 supports the electric heating element 11, so that there is a gap between the electric heating element 11 and the inner wall of the shell 13, and the gap is the first gap 102, so that the electric heating element 11 is not in direct contact with the shell 13, thereby reducing the risk of local overtemperature of the shell 13 due to direct contact between the electric heating element 11 and the shell 13, and reducing damage to the battery cell 200 due to local overtemperature, which is beneficial to improving the heat exchange effect and reliability of the battery cell 200.

[0136] In another possible embodiment, the electric cooling component 12 is installed on the bracket 14, and a second gap 103 is formed between the electric cooling component 12 and the inner wall of the shell 13. The bracket 14 supports the electric cooling component 12 so that there is a gap between the electric cooling component 12 and the inner wall of the shell 13. The gap is the second gap 103, so that the electric cooling component 12 is not in direct contact with the shell 13, thereby reducing the risk of local temperature of the shell 13 being too low due to direct contact between the electric cooling component 12 and the shell 13, and reducing damage to the battery cell 200 due to local temperature being too low, which is beneficial to improving the heat exchange effect and reliability of the battery cell 200.

[0137] In another possible embodiment, the heat exchange element 10 also includes a bracket 14 arranged in the shell 13, the electric heating element 11 is installed on the bracket 14, and a first gap 102 is formed between the electric heating element 11 and the inner wall of the shell 13; the electric cooling element 12 is installed on the bracket 14, and a second gap 103 is formed between the electric cooling element 12 and the inner wall of the shell 13; neither the electric heating element 11 nor the electric cooling element 12 is in direct contact with the shell 13, which is beneficial to improving the heat exchange effect of the battery cell 200 and improving the reliability of the battery cell 200.

[0138] By adopting the technical solution of this embodiment, the electric heating element 11 and / or the electric cooling element 12 are not in direct contact with the shell 13, thereby reducing the risk of local overheating and / or local overcooling of the heat exchange element 10, which is beneficial to improving the heat exchange effect of the battery cell 200 and improving the reliability of the battery cell 200.

[0139] In another embodiment of the present application, see Figure 6 and Figure 7 As shown, when the electric cooling element 12 and the electric heating element 11 are both installed on the bracket 14, the bracket 14 is provided with a first mounting hole 141 and a second mounting hole 142 arranged side by side, the electric heating element 11 passes through the first mounting hole 141, and the electric cooling element 12 passes through the second mounting hole 142.

[0140] The first mounting hole 141 may refer to a through hole provided in the bracket 14 for the electric heating element 11 to pass through. The electric heating element 11 is passed through the first mounting hole 141, and the hole wall of the first mounting hole 141 limits the electric heating element 11, thereby achieving support and fixation of the electric heating element 11 in the shell 13.

[0141] The second mounting hole 142 may refer to a through hole provided in the bracket 14 for the electric cooling component 12 to pass through. The electric cooling component 12 is passed through the second mounting hole 142 , and the hole wall of the second mounting hole 142 limits the electric cooling component 12 , thereby achieving support and fixation of the electric cooling component 12 in the shell 13 .

[0142] The first mounting hole 141 and the second mounting hole 142 are arranged side by side on the bracket 14; it can be understood that the first mounting hole 141 and the second mounting hole 142 are arranged at intervals along a certain direction; as an example, the first mounting hole 141 and the second mounting hole 142 can be arranged at intervals along the height direction of the heat exchanger 10, and the first mounting hole 141 can be located below the second mounting hole 142, so that the electric heating element 11 is located below the electric cooling element 12; of course, the first mounting hole 141 can be located above the second mounting hole 142, or the first mounting hole 141 and the second mounting hole 142 are arranged at intervals along the thickness direction of the heat exchanger 10, or the first mounting hole 141 and the second mounting hole 142 can also be arranged at intervals along the length direction of the heat exchanger 10.

[0143] There is a certain distance between the first mounting hole 141 and the outer wall of the bracket 14, so that a first gap 102 is formed between the electric heating element 11 and the inner wall of the shell 13; similarly, there is a certain distance between the second mounting hole 142 and the outer wall of the bracket 14, so that a second gap 103 is formed between the electric cooling element 12 and the inner wall of the shell 13.

[0144] By adopting the technical solution of this embodiment, the electric heating element 11 and the electric cooling element 12 are fixed in the shell 13 through the first mounting hole 141 and the second mounting hole 142 penetrated by the bracket 14, and the structure is simple and the processing and manufacturing are convenient; in addition, the first mounting hole 141 and the second mounting hole 142 are arranged side by side, so that after the electric heating element 11 and the electric cooling element 12 pass through the first mounting hole 141 and the second mounting hole 142 respectively, the electric heating element 11 and the electric cooling element 12 are arranged side by side, the structure of the heat exchange element 10 is regular and simple, and the mutual influence between the electric heating element 11 and the electric cooling element 12 can also be reduced, thereby improving the heat exchange effect of the heat exchange element 10.

[0145] In another embodiment of the present application, see Figure 6 , Figure 8 , Fig.10 and Fig.11As shown, there are multiple brackets 14 , which are spaced apart along the length direction of the heat exchanger 10 and divide the internal space of the shell 13 into multiple subspaces 131 ; the heat exchanger 10 has a connecting channel 15 for connecting two adjacent subspaces 131 .

[0146] There are multiple brackets 14, which can be but not limited to two, three, four, five, six, seven, or eight. Multiple brackets 14 are spaced apart along the length direction of the heat exchanger 10. Multiple brackets 14 can be arranged equidistantly along the length direction of the heat exchanger 10, or can be arranged unequally along the length direction of the heat exchanger 10. The larger the number of brackets 14, the more supporting points of the electric heating element 11 and the electric cooling element 12, the better and more stable the support of the electric heating element 11 and the electric cooling element 12, and the better the reliability of the heat exchanger 10.

[0147] The plurality of brackets 14 are spaced apart along the length direction of the heat exchanger 10 , so that the internal space of the shell 13 is divided into a plurality of subspaces 131 . The plurality of subspaces 131 are arranged along the length direction of the heat exchanger 10 , and two adjacent subspaces 131 are separated by the brackets 14 .

[0148] The connecting channel 15 may refer to a channel that can connect two adjacent subspaces 131. The channel may refer to a through hole set on the shell 13 or the bracket 14, or may refer to a channel formed by the edge of the bracket 14 and the interior of the shell 13. For example, there is a certain distance between the bracket 14 and the inner wall of the shell 13 and a gap is formed, and the gap is the connecting channel 15; or, a groove is provided on the edge of the bracket 14, and the inner wall of the shell 13 and the groove are jointly formed to form the connecting channel 15; or, a groove is provided on the inner wall of the shell 13, and the bracket 14 and the groove are jointly formed to form the connecting channel 15; or, both the edge of the bracket 14 and the inner wall of the shell 13 are provided with grooves, and the two grooves are relatively arranged and surrounded to form the connecting channel 15.

[0149] By adopting the technical solution of this embodiment and the setting of the connecting channel 15 , the heat exchange medium in two adjacent subspaces 131 can flow to each other, so as to improve the uniformity of heat exchange of the heat exchange element 10 .

[0150] In another embodiment of the present application, see Figure 6 , Figure 8 , Fig.10 and Fig.11 As shown, the connecting channel 15 includes a connecting hole 151 for connecting two adjacent subspaces 131, and the connecting hole 151 is arranged on the bracket 14; and / or, the connecting channel 15 also includes a connecting gap 152 for connecting two adjacent subspaces 131, and a connecting gap 152 is formed between the bracket 14 and the inner wall of the shell 13.

[0151] The communication hole 151 may refer to a through hole on the bracket 14 for connecting two adjacent subspaces 131. The communication hole 151 may be disposed between the first mounting hole 141 and the second mounting hole 142, or may be disposed at other positions on the bracket 14.

[0152] There is a certain distance between the edge of the bracket 14 and the inner wall of the housing 13 and a gap is formed, and the gap is the communication gap 152 .

[0153] As an example, in the height direction of the heat exchanger 10, the distance between the two opposite inner walls of the shell 13 is greater than the size of the bracket 14, that is, in the height direction of the heat exchanger 10, a connecting gap 152 is formed between at least one of the opposite side walls of the bracket 14 and the corresponding inner wall of the shell 13, so that the connecting gap 152 can connect two adjacent subspaces 131 distributed along the length direction of the heat exchanger 10; or, in the thickness direction of the heat exchanger 10, the distance between the two opposite inner walls of the shell 13 is greater than the size of the bracket 14, that is, in the thickness direction of the heat exchanger 10, a connecting gap 152 is formed between at least one of the opposite side walls of the bracket 14 and the corresponding inner wall of the shell 13, so that the connecting gap 152 can connect two adjacent subspaces 131 distributed along the length direction of the heat exchanger 10.

[0154] In a possible embodiment, the connecting channel 15 includes a connecting hole 151 for connecting two adjacent subspaces 131, and the connecting hole 151 is provided on the bracket 14; the connecting hole 151 can connect the two adjacent subspaces 131, so that the heat exchange medium in the two adjacent subspaces 131 can flow to each other, so as to improve the uniformity of heat exchange of the heat exchange element 10; in addition, the connecting hole 151 is provided on the bracket 14, which has a simple structure and is easy to process and manufacture.

[0155] In another possible embodiment, the connecting channel 15 also includes a connecting gap 152 for connecting two adjacent subspaces 131. The connecting gap 152 is formed between the bracket 14 and the inner wall of the shell 13. The connecting gap 152 can connect the two adjacent subspaces 131, so that the heat exchange medium in the two adjacent subspaces 131 can flow to each other, so as to improve the uniformity of heat exchange of the heat exchange element 10. In addition, the method of setting the connecting gap 152 is simple, and the processing and manufacturing of the heat exchange element 10 is simple and convenient.

[0156] In another possible embodiment, the connecting channel 15 includes a connecting hole 151 for connecting two adjacent subspaces 131, and the connecting hole 151 is arranged on the bracket 14; the connecting channel 15 also includes a connecting gap 152 for connecting two adjacent subspaces 131, and the connecting gap 152 is formed between the bracket 14 and the inner wall of the shell 13. The setting of the connecting hole 151 and the connecting gap 152 can make the heat exchange medium in the two adjacent subspaces 131 flow to each other, so as to improve the uniformity of heat exchange of the heat exchange element 10, and the heat exchange element 10 has a simple structure and is easy to process and manufacture.

[0157] By adopting the technical solution of this embodiment, the connecting hole 151 and / or the connecting gap 152 are arranged, and on the basis of satisfying the mutual circulation of the heat exchange medium in the two sub-spaces 131, the structure of the heat exchange element 10 is simple and the processing and manufacturing is convenient.

[0158] In another embodiment of the present application, see Figure 5 and Figure 6 As shown, the electric cooling element 12 includes a cooling portion 121 and a heat dissipation portion 122 connected to each other. At least a portion of the cooling portion 121 is located inside the housing 13 , and the heat dissipation portion 122 is located outside the housing 13 .

[0159] After the electric cooling element 12 is powered on, the portion of the electric cooling element 12 that absorbs heat is the cooling portion 121 , and the portion of the electric cooling element 12 that releases heat is the heat dissipation portion 122 .

[0160] At least part of the cooling unit 121 is located in the shell 13 . It is understandable that part of the cooling unit 121 is located in the shell 13 , and another part is located outside the shell 13 ; or, the entire cooling unit 121 is located in the shell 13 .

[0161] The heat dissipation portion 122 is located outside the shell 13 . It can be understood that the heat dissipation portion 122 is located outside the shell 13 , that is, the heat dissipation portion 122 is not located in the internal cavity of the shell 13 .

[0162] As an example, a first opening 133 is provided on one end surface of the housing 13 , the cooling portion 121 of the electric cooling element 12 penetrates into the housing 13 from the first opening 133 , and the heat dissipation portion 122 of the electric cooling element 12 is located outside the housing 13 .

[0163] By adopting the technical solution of this embodiment, when the battery cell 200 is cooled by using the shell 13, the cooling portion 121 of the electric cooling element 12 is located inside the shell 13, so that the electric cooling element 12 can have a good cooling effect on the battery cell 200; in addition, the heat dissipation portion 122 of the electric cooling portion 121 is located outside the shell 13, which can reduce the influence of the heat released by the heat dissipation portion 122 on the cooling of the battery cell 200, thereby improving the cooling effect of the battery cell 200.

[0164] In another embodiment of the present application, see Figure 5 and Figure 6 As shown, the electric cooling element 12 includes a semiconductor refrigerator; and / or the electric heating element 11 includes an electric heating rod.

[0165] Semiconductor cooler, also known as thermoelectric cooler or Peltier effect cooler, is a cooling technology based on Seebeck effect and Peltier effect. Semiconductor cooler is usually composed of a series of P-type and N-type semiconductor thermocouple pairs, which are sandwiched between two ceramic plates and connected to a DC power supply. When direct current passes through the thermocouple pair, one end absorbs heat (cooling) and the other end releases heat (heating); the part of the semiconductor cooler connected to the heat-absorbing end of the thermocouple pair is the cooling part 121, and the part of the semiconductor cooler connected to the heating end of the thermocouple pair is the heat dissipation part 122.

[0166] The electric heating rod converts electrical energy into thermal energy by utilizing the thermal effect of electric current, and transfers heat to the heated object through the high temperature radiation effect of the stainless steel tube surface. The structure of the electric heating rod is usually to place a heating wire in a metal tube, and to tightly fill the gap with crystalline magnesium oxide having good thermal conductivity and insulation. Both ends of the heating wire are connected to the power supply 20, and it has the characteristics of simple structure, uniform heating, and high thermal efficiency.

[0167] In one possible embodiment, the electric cooling element 12 includes a semiconductor refrigerator; the electric cooling element 12 adopts the structural form of a semiconductor refrigerator, the semiconductor refrigerator does not need to use a refrigerant, the semiconductor refrigerator can be cooled independently, and no connecting pipes are required. The semiconductor refrigerator occupies a small space, which is beneficial to improving the volume energy density of the battery 1100; the semiconductor refrigerator has a simple structure, which is beneficial to simplifying the structure of the heat exchange component 10 and reducing the manufacturing cost.

[0168] In another possible embodiment, the electric heating element 11 includes an electric heating rod. The electric heating element 11 adopts the structure of an electric heating rod. The electric heating rod has good heating effect and high thermal efficiency, which is beneficial to improving the heating effect of the battery cell 200 and improving the charging and discharging performance of the battery cell 200 at low temperature. In addition, the electric heating rod has a simple structure, which is beneficial to simplifying the structure of the heat exchange component 10 and reducing the manufacturing cost.

[0169] In another possible embodiment, the electric cooling element 12 includes a semiconductor refrigerator, and the electric heating element 11 includes an electric heating rod. The semiconductor refrigerator has a good cooling effect, the electric heating rod has a good heating effect, and the battery cell 200 has a good heat exchange effect. The semiconductor refrigerator and the electric heating rod have a simple structure, which is conducive to simplifying the structure of the heat exchange element 10 and reducing the manufacturing cost.

[0170] The adoption of the technical solution of this embodiment is helpful to simplify the structure of the heat exchange element 10 and reduce the manufacturing cost.

[0171] In another embodiment of the present application, see Figure 4 , Figure 5 and Figure 6 As shown, the wire 30 includes a first wire 31, the electric heating element 11 is provided with a first terminal 111 exposed outside the shell 13, one end of the first wire 31 is electrically connected to the first terminal 111, and the other end of the first wire 31 is electrically connected to the power supply 20; and / or, the wire 30 includes a second wire 32, the electric cooling element 12 is provided with a second terminal 123 exposed outside the shell 13, one end of the second wire 32 is electrically connected to the second terminal 123, and the other end of the second wire 32 is electrically connected to the power supply 20.

[0172] The first wire 31 may refer to a wire that electrically connects the electric heating element 11 and the power supply element 20; the electric energy of the power supply element 20 is transmitted to the electric heating element 11 through the first wire 31, and the electric heating element 11 is powered on and heated, thereby achieving heating of the battery cell 200; the first wire 31 may be, but is not limited to, an electric wire, a cable, or a wiring harness.

[0173] The second wire 32 may refer to a wire that electrically connects the electric cooling element 12 and the power supply element 20 ; the electric energy of the power supply element 20 is transmitted to the electric cooling element 12 through the second wire 32 , and the electric cooling element 12 is powered on for cooling, thereby cooling the battery cell 200 ; the second wire 32 may be, but is not limited to, an electric wire, a cable, or a wiring harness.

[0174] The first conductive wire 31 and the second conductive wire 32 may be two separate components, or may be integrated into one wire.

[0175] The first terminal 111 may refer to a portion of the electric heating element 11 used for electrical connection. The first terminal 111 is exposed outside the shell 13. The first terminal 111 may be located outside the shell 13; or, the shell 13 is provided with a second opening 134. The first terminal 111 is located inside the shell 13 and is exposed outside the shell 13 through the first opening 133.

[0176] The second terminal 123 may refer to the portion of the electric cooling member 12 used for electrical connection. The second terminal 123 is exposed outside the housing 13, and the second terminal 123 may be located outside the housing 13. For example, the heat dissipation portion 122 is located outside the housing, and the heat dissipation portion 122 is the second terminal 123, or a portion of the heat dissipation portion 122 is the second terminal 123; of course, the housing 13 may also be provided with a first opening 133, and the second terminal 123 may be located inside the housing 13 and exposed to the outside of the housing 13 through the first opening 133.

[0177] In a possible embodiment, the wire 30 includes a first wire 31, and the electric heating element 11 is provided with a first terminal 111 exposed outside the shell 13, one end of the first wire 31 is electrically connected to the first terminal 111, and the other end of the first wire 31 is electrically connected to the power supply 20; the first terminal 111 is exposed outside the shell 13, which can facilitate the electrical connection between the first wire 31 and the electric heating element 11, and the assembly operation of the heat exchange device 100 is simple and convenient.

[0178] In another possible embodiment, the wire 30 includes a second wire 32, and the electric cooling element 12 is provided with a second terminal 123 exposed outside the shell 13, one end of the second wire 32 is electrically connected to the second terminal 123, and the other end of the second wire 32 is electrically connected to the power supply 20; the second terminal 123 is exposed outside the shell 13, which can facilitate the electrical connection of the second wire 32 and the electric cooling element 12, and the assembly operation of the heat exchange device 100 is simple and convenient.

[0179] In another possible embodiment, the wire 30 includes a first wire 31, the electric heating element 11 is provided with a first terminal 111 exposed outside the shell 13, one end of the first wire 31 is electrically connected to the first terminal 111, and the other end of the first wire 31 is electrically connected to the power supply 20; the wire 30 includes a second wire 32, the electric cooling element 12 is provided with a second terminal 123 exposed outside the shell 13, one end of the second wire 32 is electrically connected to the second terminal 123, and the other end of the second wire 32 is electrically connected to the power supply 20; the first terminal 111 is exposed outside the shell 13, and the second terminal 123 is exposed outside the shell 13, which can facilitate the electrical connection of the wire 30 and the heat exchange element 10, and the assembly operation of the heat exchange device 100 is simple and convenient.

[0180] The first terminal 111 and the second terminal 123 can be located on the same side of the shell 13, the electrical connection operation between the wire 30 and the heat exchange element 10 is simpler, and the assembly operation of the heat exchange device 100 is simpler and more convenient; of course, the first terminal 111 and the second terminal 123 can be located on different sides of the shell 13.

[0181] By adopting the technical solution of this embodiment, the electrical connection between the wire 30 and the heat exchange element 10 can be facilitated, and the assembly operation of the heat exchange device 100 is simple and convenient.

[0182] In another embodiment of the present application, see Figure 5 , Figure 6 and Fig. 9 As shown, a rounded structure 132 is provided on the edge of the housing 13 .

[0183] The edges of the housing 13 are polished or processed to present a smooth transition state, and the structure of the smooth transition state is the chamfered structure 132 .

[0184] By adopting the technical solution of this embodiment and setting the rounded structure 132, sharp edges can be reduced, scratches on assembling personnel and the battery cell 200 can be reduced, and safety in use can be improved.

[0185] Please also read Fig.12 As shown, Fig.12 A schematic diagram of an exploded view of a heat exchange element 10 provided in some embodiments of the present application.

[0186] In another embodiment of the present application, there are multiple electric heating elements 11 and multiple electric cooling elements 12, and the multiple electric heating elements 11 and the multiple electric cooling elements 12 are arranged alternately.

[0187] A plurality of electric heating elements 11 are arranged at intervals, and an electric cooling element 12 is provided between two adjacent electric heating elements 11 ; or, a plurality of electric cooling elements 12 are arranged at intervals, and an electric heating element 11 is provided between two adjacent electric cooling elements 12 .

[0188] As an example, multiple electric heating elements 11 and multiple electric cooling elements 12 are alternately arranged along the height direction of the heat exchanger 10, or, multiple electric heating elements 11 and multiple electric cooling elements 12 are alternately arranged along the thickness direction of the heat exchanger 10, or, multiple electric heating elements 11 and multiple electric cooling elements 12 are alternately arranged along the length direction of the heat exchanger 10. Of course, multiple electric heating elements 11 and multiple electric cooling elements 12 can also be alternately arranged along other directions.

[0189] By adopting the technical solution of this embodiment, the multiple electric heating elements 11 and the multiple electric cooling elements 12 are alternately arranged, so that the heat exchange element 10 has multiple heating and cooling effects, and the heat exchange effect of the battery cell 200 is better.

[0190] In another embodiment of the present application, see Fig.12 As shown, the heat exchange element 10 has a heat exchange surface 101 for exchanging heat with a heat exchange element, and a plurality of electric heating elements 11 and a plurality of electric cooling elements 12 are alternately distributed in a direction parallel to the heat exchange surface 101 .

[0191] The heat exchange surface 101 may refer to a surface of the heat exchange element 10 that exchanges heat with the battery cell 200 .

[0192] For example, see Figure 3 and Figure 4 As shown, the surface of the heat exchange element 10 and the battery cell 200 opposite to each other is the heat exchange surface 101, wherein the heat exchange element 10 can directly abut against the heat exchange surface 101, and components such as thermal conductive glue and thermal conductive pads can also be provided between the heat exchange element 10 and the heat exchange surface 101 to improve the heat exchange effect.

[0193] For example, the battery cell 200 is located on the side of the shell 13 along the thickness direction, the surface of the shell 13 along the thickness direction is the heat exchange surface 101, and the multiple electric heating elements 11 and the multiple electric cooling elements 12 are alternately distributed along the height direction or the length direction of the heat exchange element 10. Of course, the multiple electric heating elements 11 and the multiple electric cooling elements 12 can also be alternately arranged along other directions parallel to the heat exchange surface 101.

[0194] By adopting the technical solution of this embodiment, multiple electric heating elements 11 and multiple electric cooling elements 12 are alternately distributed in a direction parallel to the heat exchange surface 101, which can improve the uniformity of temperature distribution of the heat exchange surface 101 of the heat exchange element 10 and improve the heat exchange effect of the battery cell 200.

[0195] In another embodiment of the present application, see Figure 3 As shown, the heat exchange device 100 also includes a temperature measuring component for detecting the temperature of the component to be heat exchanged, and the power supply component 20 is electrically connected to the temperature measuring component to control the cooling of the electric cooling component 12 and / or the heating of the electric heating component 11.

[0196] The temperature measuring component may refer to a component used to measure the temperature of the component to be heat exchanged, and the temperature measuring component may be, but is not limited to, a temperature sensor or an infrared thermometer.

[0197] The power supply 20 and the temperature measuring component can be electrically connected through the third wire 40, that is, one end of the third wire 40 is electrically connected to the power supply 20, and the other end of the third wire 40 is electrically connected to the temperature measuring component; in the case of multiple battery cells 200, each battery cell 200 is provided with a temperature measuring component, and each temperature measuring component and the power supply 20 are connected through the third wire 40, wherein multiple third wires 40 can be integrated into one wire, such as: cable, wiring harness, etc., to facilitate electrical connection and wiring.

[0198] In a possible embodiment, the heat exchange device 100 also includes a temperature measuring component for detecting the temperature of the component to be heat exchanged. The power supply 20 is electrically connected to the temperature measuring component to control the cooling of the electric cooling component 12. After the temperature measuring component feeds back the temperature information to the power supply 20, the power supply 20 can turn on the electric cooling component 12 according to the temperature information to achieve cooling of the battery cell 200; the power supply 20 can also adjust the cooling effect of the electric cooling component 12, so as to quickly reduce the temperature of the battery cell 200 to a reasonable temperature range, so that the battery cell 200 has a good cooling effect, thereby achieving intelligent temperature regulation of the battery cell 200.

[0199] In another possible embodiment, the heat exchange device 100 also includes a temperature measuring component for detecting the temperature of the component to be heat exchanged. The power supply 20 is electrically connected to the temperature measuring component to control the heating of the electric heating component 11. After the temperature measuring component feeds back the temperature information to the power supply 20, the power supply 20 can turn on the electric heating component 11 according to the temperature information to achieve heating of the battery cell 200; the power supply 20 can also adjust the heating effect of the electric heating component 11, so as to heat the temperature of the battery cell 200 more quickly to a reasonable temperature range, so that the battery cell 200 has a good heating effect, thereby achieving intelligent temperature regulation of the battery cell 200.

[0200] In another possible embodiment, the heat exchange device 100 also includes a temperature measuring component for detecting the temperature of the component to be heat exchanged, and the power supply 20 is electrically connected to the temperature measuring component to control the cooling of the electric cooling component 12 and the heating of the electric heating component 11; through the cooperation of the power supply 20 and the temperature measuring component, the intelligent temperature adjustment of the battery cell 200 can be realized, the battery cell 200 has a better heat exchange effect, and the charging and discharging performance of the battery cell 200 is better, which is beneficial to improving the performance of the battery 1100.

[0201] By adopting the technical solution of this embodiment, through the cooperation of the power supply component 20 and the temperature measuring component, the intelligent temperature regulation of the battery cell 200 can be achieved, the battery cell 200 has a better heat exchange effect, and the charging and discharging performance of the battery cell 200 is better, which is beneficial to improving the performance of the battery 1100.

[0202] In another embodiment of the present application, see Figure 3 and Figure 4 As shown, there are multiple heat exchange elements 10, and a receiving space 1001 for accommodating the heat exchange element is formed between two adjacent heat exchange elements 10.

[0203] The receiving space 1001 may refer to a space enclosed between two adjacent heat exchange elements 10, and the space is used to place the heat exchange element. For example, the battery cell 200 is located in the receiving space 1001 and exchanges heat with the heat exchange element 10, thereby achieving heat exchange of the battery cell 200.

[0204] For example, a plurality of heat exchange elements 10 may be arranged at intervals, and the gap between two adjacent heat exchange elements 10 may form a receiving space 1001; or, among two adjacent heat exchange elements 10, the surface of one heat exchange element 10 is recessed away from the other heat exchange element 10 to form the receiving space 1001; or, the opposing surfaces of two adjacent heat exchange elements 10 are recessed away from each other to form the receiving space 1001.

[0205] By adopting the technical solution of this embodiment, after the battery cell 200 is placed in the receiving space 1001, two adjacent heat exchange components 10 can perform heat exchange on multiple positions of the battery cell 200, and the heat exchange effect of the battery cell 200 is good.

[0206] In another embodiment of the present application, see Figure 3 and Figure 4 As shown, a plurality of heat exchange elements 10 are arranged at intervals.

[0207] There is a gap between two adjacent heat exchange elements 10 , and the gap forms a receiving space 1001 .

[0208] By adopting the technical solution of this embodiment, a plurality of heat exchange elements 10 are arranged at intervals, and the arrangement is simple, which is beneficial to simplifying the structure of the heat exchange device 100 and improving assembly efficiency.

[0209] In another embodiment of the present application, see Figure 3 and Figure 4 As shown, a battery 1100 is provided, including a battery cell 200 and the heat exchange device 100 as described in the above embodiment, and the part to be heat exchanged includes the battery cell 200.

[0210] The battery 1100 of the embodiment of the present application adopts the above-mentioned heat exchange device 100, and the electric cooling element 12 of the heat exchange element 10 and the electric cooling element 12 are electrically connected to the power supply 20 through the wire 30, and the wire 30 can be flexibly arranged in the box 300 to achieve avoidance, so that the battery 1100 can adopt the heat exchange element 10 of the same structure, reducing the types of heat exchange elements 10 in the battery 1100, which is beneficial to reducing the production cost and assembly efficiency of the battery 1100; in addition, the wire 30 occupies a small space, which is also beneficial to reducing the space occupied by the heat exchange device 100 in the box 300, which is beneficial to improving the volume energy density of the battery 1100; at the same time, the flexible arrangement of the wire 30 can also make full use of the space in the box 300, further improving the volume energy density of the battery 1100.

[0211] In another embodiment of the present application, see Figure 3 and Figure 4 As shown, the battery 1100 further includes a housing 300 , and the battery cells 200 and at least a portion of the heat exchange element 10 are located in the housing 300 .

[0212] The box 300 may refer to a component for providing installation space for the battery cell 200 and the heat exchange element 10, and the box 300 is hollow inside to form a cavity for accommodating the battery cell 200 and the heat exchange element 10. The battery cell 200 is located in the box 300. The heat exchange element 10 may be partially located in the box 300 and the other part is located outside the box 300, or the entire heat exchange element 10 is located in the box 300.

[0213] By adopting the technical solution of this embodiment, the box body 300 can protect the battery cell 200 and the heat exchange element 10, thereby improving the reliability of the battery 1100.

[0214] In another embodiment of the present application, see Figure 3 and Figure 4 As shown, the side wall of the box body 300 is provided with a first penetration hole 301, and the heat exchange element 10 is penetrated by the first penetration hole 301; the electric cooling element 12 includes a cooling part 121 and a heat dissipation part 122 connected to each other, at least part of the cooling part 121 is located inside the box body 300, and the heat dissipation part 122 is located outside the box body 300.

[0215] The first through hole 301 may refer to a through hole provided on the side wall of the housing 300, through which the heat exchange element 10 is passed. The shape of the first through hole 301 may be adapted to the shape of the heat exchange element 10, so as to fix the heat exchange element 10; the first through hole 301 may be in various shapes, such as square, rectangular, circular, elliptical, etc.

[0216] The heat exchange element 10 is penetrated by a first penetration hole 301, so that a part of the heat exchange element 10 is located inside the box body 300, and another part is located outside the box body 300, at least a part of the cooling part 121 of the electric cooling element 12 is located inside the box body 300, and the heat dissipation part 122 of the electric cooling part 121 is located outside the box body 300; wherein, a part of the cooling part 121 may be located inside the box body 300, and another part may be located outside the box body 300, or the entire cooling part 121 may be located inside the box body 300.

[0217] For example, see Figure 3 and Figure 4 As shown, the first penetration hole 301 is a rectangular hole, and the first penetration hole 301 passes through the upper end surface of the side wall of the second part 320 to form an opening, so that the heat exchange element 10 can be inserted into the first penetration hole 301 from the opening, and the assembly operation of the heat exchange element 10 and the box body 300 is simple; the number of the first penetration holes 301 can be multiple, and the multiple first penetration holes 301 are located on the same side of the box body 300, and the multiple first penetration holes 301 are arranged at intervals along the thickness direction of the heat exchange element 10, so as to facilitate the multiple heat exchange elements 10 to be penetrated into the multiple first penetration holes 301 one by one.

[0218] By adopting the technical solution of this embodiment, the heat dissipation part 122 is located outside the box body 300, and the heat emitted by the heat dissipation part 122 has little effect on the cooling of the battery cell 200 in the box body 300, and the heat exchange effect of the battery cell 200 is good; in addition, the airflow outside the box body 300 can be used to take away the heat of the heat dissipation part 122, so as to achieve good heat dissipation of the heat dissipation part 122 and improve the cooling effect of the electric cooling element 12; at the same time, the heat dissipation part 122 does not occupy the internal space of the box body 300, which is beneficial to improving the energy density of the battery 1100, and does not require the internal structure of the box body 300, which is also beneficial to reducing the types of heat exchange components 10.

[0219] In another embodiment of the present application, see Figure 3 and Figure 4 As shown, the width of the first through hole 301 is H1, and the thickness of the heat exchange element 10 is H2, wherein 0.9≤H2 / H1≤1.1.

[0220] The hole width H1 of the first through hole 301 may refer to the distance between the two hole walls of the first through hole 301 along the thickness direction of the first through hole 301 .

[0221] The thickness H2 of the heat exchanger 10 may refer to the distance between two relative surfaces of the heat exchanger 10 in the thickness direction thereof; for example, the thickness H2 of the heat exchanger 10 refers to the distance between two relative surfaces of the shell 13 in the thickness direction thereof.

[0222] By adopting the technical solution of this embodiment, the design of 0.9≤H2 / H1≤1.1, the thickness of the heat exchanger 10 is not much different from the hole width of the first penetration hole 301, and the hole wall of the first penetration hole 301 can play a certain supporting and limiting role on the side wall of the heat exchanger 10 to fix the heat exchanger 10. At the same time, it plays a positioning role for the heat exchanger 10 during the assembly process of the battery 1100, thereby simplifying the assembly operation and reducing the production cost.

[0223] In another embodiment of the present application, see Figure 3 and Figure 4 As shown, 0.95≤H2 / H1≤1.05.

[0224] By adopting the technical solution of this embodiment, the design of 0.95≤H2 / H1≤1.05, the thickness of the heat exchanger 10 is relatively close to the hole width of the first penetration hole 301, and the hole wall of the first penetration hole 301 can play a good supporting and limiting role on the side wall of the heat exchanger 10 to fix the heat exchanger 10. At the same time, it plays a positioning role for the heat exchanger 10 during the assembly process of the battery 1100, thereby simplifying the assembly operation and reducing the production cost.

[0225] In some embodiments, the value of H2 / H1 may be 0.9, 1.1, or any value between 0.9 and 1.1, for example, 0.9, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, 1, 1.01, 1.02, 1.03, 1.04, 1.05, 1.06, 1.07, 1.08, 1.09, 1.1.

[0226] In another embodiment of the present application, see Figure 3 and Figure 4 As shown, the side wall of the box body 300 is provided with a second through hole 302, the power supply 20 is located in the box body 300, and the wire 30 is passed through the second through hole 302; the wire 30 includes a first wire 31, and the electric heating element 11 is provided with a first terminal 111 exposed outside the box body 300, one end of the first wire 31 is electrically connected to the first terminal 111, and the other end of the first wire 31 is electrically connected to the power supply 20; and / or, the wire 30 includes a second wire 32, and the electric cooling element 12 is provided with a second terminal 123 exposed outside the box body 300, one end of the second wire 32 is electrically connected to the second terminal 123, and the other end of the second wire 32 is electrically connected to the power supply 20.

[0227] The second through hole 302 may refer to a through hole provided on the side wall of the box body 300, and the through hole is used for passing the first wire 31 and / or the second wire 32. The second through hole 302 may be in various shapes, such as square, rectangular, circular, elliptical, etc.

[0228] The first terminal 111 is located outside the box 300, one end of the first wire 31 is electrically connected to the first terminal 111, and the other end of the first wire 31 passes through the second through hole 302 and is electrically connected to the power supply 20, so that the electrical conduction of the electric heating element 11 can be achieved, and the heating of the battery cell 200 can be achieved.

[0229] The second terminal 123 is located outside the box 300, one end of the second wire 32 is electrically connected to the second terminal 123, and the other end of the second wire 32 passes through the second through hole 302 and is electrically connected to the power supply 20, so that the electrical cooling component 12 can be electrically conductive and the battery cell 200 can be cooled.

[0230] By adopting the technical solution of this embodiment, the first terminal 111 and / or the second terminal 123 are located outside the box body 300, so that the first terminal 111 and / or the second terminal 123 do not need to undergo structural changes due to avoiding the structure inside the box body 300 and adapting to the arrangement of the battery cells 200, which can reduce the types of heat exchange components 10; in addition, the first wire 31 and / or the second wire 32 can be routed from the outside of the box body 300, which can reduce the space occupied in the box body 300, which is beneficial to improving the volume energy density of the battery 1100.

[0231] In another embodiment of the present application, see Figure 3 and Figure 4 As shown, the battery 1100 includes a control unit 400 for controlling the charging and discharging of the battery cell 200 , and the power supply unit 20 includes the control unit 400 .

[0232] The control component 400 may refer to a component for controlling the charging and discharging of the battery cell 200. The control component 400 is electrically connected to the battery cell 200 and can transfer the electric energy released by the battery cell 200 to the electric heating component 11 and the electric cooling component 12 through the wire 30 to achieve heat exchange of the battery cell 200. For example, the control component 400 is a battery management system (Battery Management System, referred to as BMS).

[0233] By adopting the technical solution of this embodiment, the control component 400 in the battery 1100 is directly used as the power supply component 20 without adding additional components, which is beneficial to saving space and manufacturing costs.

[0234] In another embodiment of the present application, see Figure 3 and Figure 4 As shown, there are multiple heat exchange elements 10 and multiple battery cells 200 . The multiple battery cells 200 are divided into multiple columns of battery cells 200 . At least one column of battery cells 200 is provided between two adjacent heat exchange elements 10 .

[0235] There are multiple battery cells 200, which are divided into multiple columns of battery cells 200. Each column of battery cells 200 may include multiple battery cells 200, such as square battery cells 200, etc. Each column of battery cells 200 may also include one battery cell 200, such as blade battery cells 200, etc.

[0236] At least one column of battery cells 200 is provided between two adjacent heat exchangers. It can be understood that one or more columns of battery cells 200 can be provided between two adjacent heat exchangers 10. The multiple columns of battery cells 200 are arranged along the thickness direction of the heat exchanger 10, and the battery cells 200 in each column of battery cells 200 are arranged along the length direction of the heat exchanger 10. In this way, the battery cells 200 in a column of battery cells 200 adjacent to the heat exchanger 10 can all exchange heat with the heat exchanger 10, thereby improving the uniformity of heat exchange of the battery 1100 and the heat exchange uniformity.

[0237] For example, a row of battery cells 200 is disposed between two adjacent heat exchange elements 10 , so that double-sided heat exchange of the battery cells 200 can be achieved.

[0238] For example, two rows of battery cells 200 are disposed between two adjacent heat exchange elements 10 , so that single-sided heat exchange of the battery cells 200 can be achieved.

[0239] By adopting the technical solution of this embodiment, the arrangement of multiple heat exchange elements 10 can meet the heat exchange requirements of multiple battery cells 200 .

[0240] The present application is described below in conjunction with some embodiments.

[0241] Embodiment 1

[0242] In this embodiment, see Figures 3 to 11 As shown, the battery 1100 includes a box body 300, a plurality of battery cells 200 and a heat exchange device 100, the heat exchange device 100 includes a heat exchange element 10 and a power supply element 20, the heat exchange element includes an electric heating element 11 for heating the heat exchange element and an electric cooling element 12 for cooling the heat exchange element; the power supply element 20 is electrically connected to the electric heating element 11 and the electric cooling element 12 through a wire 30, and the power supply element 20 is used to supply power to the electric heating element 11 and the electric cooling element 12.

[0243] In this embodiment, the heat exchange element 10 further includes a shell 13 , and at least a portion of the electric heating element 11 and at least a portion of the electric cooling element 12 are located in the shell 13 .

[0244] In this embodiment, the shell 13 is filled with heat exchange medium.

[0245] In this embodiment, when the heat exchange element 10 is exchanging heat with the element to be heat exchanged, the electric heating element 11 is located at the lower side of the electric cooling element 12 .

[0246] In this embodiment, the heat exchange element 10 also includes a bracket 14 arranged in the shell 13, the electric heating element 11 is installed on the bracket 14, and a first gap 102 is formed between the electric heating element 11 and the inner wall of the shell 13; and / or, the electric cooling element 12 is installed on the bracket 14, and a second gap 103 is formed between the electric cooling element 12 and the inner wall of the shell 13.

[0247] In this embodiment, when the electric cooling element 12 and the electric heating element 11 are both installed on the bracket 14, the bracket 14 is provided with a first mounting hole 141 and a second mounting hole 142 arranged side by side, the electric heating element 11 passes through the first mounting hole 141, and the electric cooling element 12 passes through the second mounting hole 142.

[0248] In this embodiment, there are multiple brackets 14 , which are spaced apart along the length direction of the heat exchanger 10 and divide the internal space of the shell 13 into multiple subspaces 131 ; the heat exchanger 10 has a connecting channel 15 for connecting two adjacent subspaces 131 .

[0249] In this embodiment, the connecting channel 15 includes a connecting hole 151 for connecting two adjacent subspaces 131, and the connecting hole 151 is arranged on the bracket 14; and / or, the connecting channel 15 also includes a connecting gap 152 for connecting two adjacent subspaces 131, and a connecting gap 152 is formed between the bracket 14 and the inner wall of the shell 13.

[0250] In this embodiment, the electric cooling element 12 includes a cooling portion 121 and a heat dissipation portion 122 which are connected to each other. At least a portion of the cooling portion 121 is located inside the housing 13 , and the heat dissipation portion 122 is located outside the housing 13 .

[0251] In this embodiment, the electric cooling element 12 is a semiconductor refrigerator; and / or the electric heating element 11 includes an electric heating rod.

[0252] In this embodiment, the wire 30 includes a first wire 31, the electric heating element 11 is provided with a first terminal 111 exposed outside the housing 13, one end of the first wire 31 is electrically connected to the first terminal 111, and the other end of the first wire 31 is electrically connected to the power supply 20;

[0253] And / or, the wire 30 includes a second wire 32 , the electric cooling element 12 is provided with a second terminal 123 exposed outside the shell 13 , one end of the second wire 32 is electrically connected to the second terminal 123 , and the other end of the second wire 32 is electrically connected to the power supply 20 .

[0254] In this embodiment, a rounded structure 132 is provided at the edge of the housing 13 .

[0255] In this embodiment, the heat exchange device 100 further includes a temperature measuring element for detecting the temperature of the heat exchange element, and the power supply element 20 is electrically connected to the temperature measuring element to control the cooling of the electric cooling element 12 and / or the heating of the electric heating element 11 .

[0256] In this embodiment, there are multiple heat exchange elements 10 , and a receiving space 1001 for accommodating the heat exchange element is formed between two adjacent heat exchange elements 10 .

[0257] In this embodiment, a plurality of heat exchange elements 10 are arranged at intervals.

[0258] In this embodiment, the component to be heat exchanged includes a battery cell 200 .

[0259] In this embodiment, the battery 1100 further includes a box body 300 , and the battery cells 200 and at least a portion of the heat exchange element 10 are located in the box body 300 .

[0260] In this embodiment, a first penetration hole 301 is provided on the side wall of the box body 300, and the heat exchange element 10 is penetrated through the first penetration hole 301; the electric cooling element 12 includes a cooling part 121 and a heat dissipation part 122 connected to each other, at least part of the cooling part 121 is located inside the box body 300, and the heat dissipation part 122 is located outside the box body 300.

[0261] In this embodiment, the width of the first through hole 301 is H1, and the thickness of the heat exchange element 10 is H2, wherein 0.9≤H2 / H1≤1.1.

[0262] In this embodiment, 0.95≤H2 / H1≤1.05.

[0263] In this embodiment, a second through hole 302 is provided on the side wall of the box body 300, the power supply 20 is located in the box body 300, and the wire 30 is passed through the second through hole 302; the wire 30 includes a first wire 31, and the electric heating element 11 is provided with a first terminal 111 exposed outside the box body 300, one end of the first wire 31 is electrically connected to the first terminal 111, and the other end of the first wire 31 is electrically connected to the power supply 20; the wire 30 includes a second wire 32, and the electric cooling element 12 is provided with a second terminal 123 exposed outside the box body 300, one end of the second wire 32 is electrically connected to the second terminal 123, and the other end of the second wire 32 is electrically connected to the power supply 20.

[0264] In this embodiment, the battery 1100 includes a control unit 400 for controlling the charging and discharging of the battery cell 200 , and the power supply unit 20 includes the control unit 400 .

[0265] In this embodiment, there are multiple heat exchange elements 10 and multiple battery cells 200 . The multiple battery cells 200 are divided into multiple columns of battery cells 200 . At least one column of battery cells 200 is provided between two adjacent heat exchange elements 10 .

[0266] Embodiment 2

[0267] The difference between this embodiment and the first embodiment is that: Fig.12 As shown, there are multiple electric heating elements 11 and multiple electric cooling elements 12, and the multiple electric heating elements 11 and the multiple electric cooling elements 12 are arranged alternately.

[0268] In this embodiment, the heat exchange element 10 has a heat exchange surface 101 for exchanging heat with a heat exchange element, and a plurality of electric heating elements 11 and a plurality of electric cooling elements 12 are alternately distributed in a direction parallel to the heat exchange surface 101 .

[0269] In another embodiment of the present application, an electrical device is provided, comprising the heat exchange device 100 as described in the above embodiment, and / or comprising the battery 1100 as described in the above embodiment.

[0270] It can be understood that the electrical equipment includes the heat exchange device 100 as described in the above embodiment, and the heat exchange device 100 can perform heat exchange on the battery cell 200, and can also perform heat exchange on other components in the electrical equipment; or, the electrical equipment includes the battery 1100 as described in the above embodiment; or, the electrical equipment includes the heat exchange device 100 as described in the above embodiment and the battery 1100 of the above embodiment, that is, the battery 1100 includes the heat exchange device 100 of the above embodiment, and the electrical equipment also includes a heat exchange device 100 for exchanging heat with other components except the battery cell 200.

[0271] The electrical equipment of the embodiment of the present application adopts the above-mentioned heat exchange device 100, which is beneficial to reducing the manufacturing cost, saving internal space, and improving the compactness of the structure of the electrical equipment and the performance of the electrical equipment.

[0272] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other, and for the sake of brevity, they will not be repeated herein.

[0273] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A heat exchange device, characterized in that: include: The heat exchange element comprises an electric heating element for heating the heat exchange element and an electric cooling element for cooling the heat exchange element; as well as A power supply component is electrically connected to the electric heating component and the electric cooling component through a wire, and the power supply component is used to supply power to the electric heating component and the electric cooling component.

2. The heat exchange device according to claim 1, characterized in that: The heat exchange element further includes a shell, and at least a portion of the electric heating element and at least a portion of the electric cooling element are located in the shell.

3. The heat exchange device according to claim 2, characterized in that: The shell is filled with heat exchange medium.

4. The heat exchange device according to claim 3, characterized in that: When the heat exchanging element is exchanging heat with the element to be heat exchanged, the electric heating element is located at the lower side of the electric cooling element.

5. The heat exchange device according to any one of claims 2 to 4, characterized in that: The heat exchange element also includes a bracket arranged in the shell, the electric heating element is installed on the bracket, and a first gap is formed between the electric heating element and the inner wall of the shell; and / or the electric cooling element is installed on the bracket, and a second gap is formed between the electric cooling element and the inner wall of the shell.

6. The heat exchange device according to claim 5, characterized in that: When the electric cooling element and the electric heating element are both mounted on the bracket, the bracket is provided with a first mounting hole and a second mounting hole arranged side by side, the electric heating element passes through the first mounting hole, and the electric cooling element passes through the second mounting hole.

7. The heat exchange device according to claim 5 or 6, characterized in that: There are multiple supports, which are spaced apart along the length direction of the heat exchanger and divide the internal space of the shell into multiple subspaces; the heat exchanger has a connecting channel for connecting two adjacent subspaces.

8. The heat exchange device according to claim 7, characterized in that: The connecting passage includes a connecting hole for connecting two adjacent subspaces, and the connecting hole is arranged on the bracket; and / or the connecting passage also includes a connecting gap for connecting two adjacent subspaces, and the connecting gap is formed between the bracket and the inner wall of the shell.

9. The heat exchange device according to any one of claims 2 to 8, characterized in that: The electric cooling element comprises a cooling portion and a heat dissipation portion connected to each other, at least a portion of the cooling portion is located inside the housing, and the heat dissipation portion is located outside the housing.

10. The heat exchange device according to any one of claims 2 to 9, characterized in that: The electric cooling element is a semiconductor refrigerator; and / or the electric heating element includes an electric heating rod.

11. The heat exchange device according to any one of claims 2 to 10, characterized in that: The wire comprises a first wire, the electric heating element is provided with a first terminal exposed outside the shell, one end of the first wire is electrically connected to the first terminal, and the other end of the first wire is electrically connected to the power supply element; And / or, the wire includes a second wire, the electric cooling element is provided with a second terminal exposed outside the shell, one end of the second wire is electrically connected to the second terminal, and the other end of the second wire is electrically connected to the power supply element.

12. The heat exchange device according to any one of claims 2 to 11, characterized in that: A rounded structure is provided at the edge of the shell.

13. The heat exchange device according to any one of claims 1 to 12, characterized in that: There are multiple electric heating elements, and there are multiple electric cooling elements. The multiple electric heating elements and the multiple electric cooling elements are arranged alternately.

14. The heat exchange device according to claim 13, characterized in that: The heat exchange element has a heat exchange surface for exchanging heat with the element to be heat exchanged, and the plurality of electric heating elements and the plurality of electric cooling elements are alternately distributed along a direction parallel to the heat exchange surface.

15. The heat exchange device according to any one of claims 1 to 14, characterized in that: The heat exchange device further comprises a temperature measuring component for detecting the temperature of the heat exchange component, and the power supply component is electrically connected to the temperature measuring component to control the cooling of the electric cooling component and / or the heating of the electric heating component.

16. The heat exchange device according to any one of claims 1 to 15, characterized in that: There are multiple heat exchange components, and a receiving space for accommodating the component to be heat exchanged is formed between two adjacent heat exchange components.

17. The heat exchange device according to claim 16, characterized in that: The plurality of heat exchange elements are arranged at intervals.

18. A battery, characterized in that: It comprises a battery cell and the heat exchange device as claimed in any one of claims 1 to 17, wherein the part to be heat exchanged comprises the battery cell.

19. The battery according to claim 18, characterized in that: The battery further includes a box, and at least a portion of the battery cells and the heat exchange element are located in the box.

20. The battery according to claim 19, characterized in that: The side wall of the box body is provided with a first penetration hole, and the heat exchange element is penetrated through the first penetration hole; the electric cooling element includes a cooling part and a heat dissipation part connected to each other, at least part of the cooling part is located in the box body, and the heat dissipation part is located outside the box body.

21. The battery according to claim 20, characterized in that: The width of the first through hole is H1, and the thickness of the heat exchange element is H2, wherein 0.9≤H2 / H1≤1.

1.

22. The battery according to claim 21, characterized in that: 0.95≤H2 / H1≤1.

05.

23. The battery according to any one of claims 19 to 22, characterized in that: A second through hole is provided on the side wall of the box body, the power supply is located in the box body, and the wire is passed through the second through hole; The wire comprises a first wire, the electric heating element is provided with a first terminal exposed outside the box, one end of the first wire is electrically connected to the first terminal, and the other end of the first wire is electrically connected to the power supply element; And / or, the wire includes a second wire, the electric cooling element is provided with a second terminal exposed outside the box, one end of the second wire is electrically connected to the second terminal, and the other end of the second wire is electrically connected to the power supply element.

24. The battery according to any one of claims 18 to 23, characterized in that: The battery includes a control component for controlling the charging and discharging of the battery cells, and the power supply component includes the control component.

25. The battery according to any one of claims 18 to 24, characterized in that: There are multiple heat exchange elements, there are multiple battery cells, the multiple battery cells are divided into multiple columns of battery cells, and at least one column of battery cells is arranged between two adjacent heat exchange elements.

26. An electrical equipment, characterized in that: The heat exchange device comprises any one of claims 1 to 17, and / or the battery comprises any one of claims 18 to 25.

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