Heat exchange device, battery and electric device

Abstract

The utility model relates to a heat exchange device, a battery and an electric device, and the heat exchange device comprises a heat exchange body in which a heat exchange medium flows; the at least one lug boss is arranged on the heat exchange body; and the lug bosses are used for realizing fixed-point breakdown with the battery monomers. The heat exchange device, the battery and the power utilization device have the advantage of being good in safety.

Description

Technical Field

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

[0002] With the extensive development of new energy technologies, batteries have been widely used. Usually, batteries will emit heat during use, and heat exchange devices are required to ensure that the batteries work at a suitable ambient temperature, thereby extending the battery life and charging and discharging efficiency.

[0003] At present, when a battery cell is punctured, it often brings serious consequences. Not only will it cause the insulation of adjacent battery cells to fail, it may also cause fire and explosion, resulting in poor battery safety. Summary of the invention

[0004] Based on this, it is necessary to provide a heat exchange device, a battery and an electrical device to address the problem of poor battery safety performance.

[0005] A first aspect of an embodiment of the present application provides a heat exchange device, comprising: a heat exchange body, inside which a heat exchange medium flows; and at least one protrusion, which is arranged on the heat exchange body; the protrusion is used to achieve fixed-point penetration with a battery cell.

[0006] In this way, when the battery cell carried on the heat exchange body leaks electricity or liquid, the top of the protrusion can form a relatively high electric field under the principle of tip discharge, and then the battery cell can be punctured at a fixed point through the protrusion, which makes it convenient for the operator to accurately determine the location of the breakdown point, and can set corresponding protection and detection as needed, so as to discover the safety hazard of leakage as early as possible, and cut off the power to the battery cell with leakage through the battery management system (not marked), so as to prevent overheating and runaway, avoid battery fire and explosion, and effectively improve the battery safety performance.

[0007] In one embodiment, the heat exchange body includes two relatively large-area bearing plates and two relatively small-area side plates; the two bearing plates are used to bear the battery cells; the two side plates are respectively connected to the two sides of the two bearing plates to enclose a heat exchange channel for the heat exchange medium to flow; the protrusion is provided on the outer side of at least one bearing plate away from the heat exchange channel. By providing a protrusion on the outer side of at least one bearing plate away from the heat exchange channel; the outer side of the bearing plate with the protrusion can be used to bear the battery cells, and when the battery cells leak electricity or liquid, the battery cells can be penetrated at a fixed point through the protrusion, so that the operator can accurately determine the location of the breakdown point, and can set corresponding protection and detection as needed, so as to find the safety hazard of leakage as early as possible, and cut off the power supply of the battery cells with leakage or liquid through the battery management system, so as to prevent overheating and runaway, avoid battery fire and explosion, and effectively improve the safety performance of the battery.

[0008] In one embodiment, the heat exchange device includes a plurality of the protrusions; the heat exchange body includes a center line extending along the flow direction of the heat exchange medium; all the protrusions are symmetrically distributed on the two side areas of the carrier plate along the center line, and two adjacent protrusions are spaced apart from each other. In this way, the protrusions are evenly distributed on both sides of the carrier plate. When the carrier plate carries a battery cell, the top and bottom of the battery cell can be close to each protrusion respectively. When the top or bottom of the battery cell leaks electricity or liquid, the corresponding protrusion and the top / bottom of the battery cell can achieve fixed-point penetration, so that the operator can accurately determine the location of the breakdown point, and finally prevent the battery cell from overheating and runaway, avoid fire and explosion, and effectively improve the safety performance of the battery.

[0009] In one embodiment, the heat exchange device includes four protrusions; the four protrusions are respectively arranged on the four corners of the carrier plate. In this way, the protrusions are evenly distributed on the four corners of the carrier plate. When the carrier plate carries a battery cell, the four corners of the battery cell can be close to each protrusion. When the battery cell leaks electricity or liquid, the protrusion closest to it can achieve fixed-point penetration with the battery cell, so as to find the safety hazard of leakage as early as possible, and cut off the power supply of the battery cell with leakage through the battery management system, so as to prevent overheating and runaway, avoid battery fire and explosion, and effectively improve the safety performance of the battery.

[0010] In one embodiment, the protrusion has a protrusion height A from the surface of the carrier plate, and satisfies 2 mm ≤ A ≤ 5 mm. In this way, when the battery cell carried on the heat exchange body leaks electricity or liquid, the top of the protrusion can form a relatively high electric field under the principle of tip discharge, which facilitates the realization of fixed-point penetration.

[0011] In one embodiment, the heat exchange device includes a current collector, which is arranged at the end of the heat exchange body along the flow direction of the heat exchange medium, and is used to lead out or introduce the heat exchange medium from the heat exchange body; the protrusion is arranged in the middle area of ​​the support plate that is not covered by the current collector. In this way, when the battery cell supported on the heat exchange body leaks electricity or liquid, the protrusion can achieve fixed-point penetration with the battery cell, so that the operator can find the leakage as early as possible, and the battery management system can cut off the power supply of the battery cell that leaks electricity or liquid, so as to prevent overheating and runaway, avoid battery fire and explosion, and effectively improve the safety performance of the battery.

[0012] In one embodiment, the heat exchange body is a harmonica tube; and / or, the heat exchange body is made of aluminum, aluminum alloy, steel, or steel alloy; and / or, the surface of the heat exchange body is covered with an insulating heat-conducting layer.

[0013] In one embodiment, the protrusion is integrally connected to the heat exchange body; or, the protrusion is welded to the heat exchange body.

[0014] In one of the embodiments, the protrusion is made of aluminum, aluminum alloy, steel, or steel alloy; and / or, the end of the protrusion away from the heat exchange body is in a smooth spherical shape.

[0015] A second aspect of an embodiment of the present application provides a battery, including a battery cell, a management system and the above-mentioned heat exchange device; the management system is signal-connected to the protrusion; and the side wall of at least one side of the heat exchange body is thermally conductively connected to the battery cell.

[0016] A third aspect of the embodiments of the present application provides an electrical device, comprising the above-mentioned battery.

[0017] In one embodiment, the electrical device is an energy storage cabinet.

[0018] 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

[0019] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0020] Figure 2 Schematic diagram of the exploded structure of a battery provided for some embodiments of the present application.

[0021] Figure 3A schematic diagram of the structure of a battery module provided in some embodiments of the present application.

[0022] Figure 4 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application.

[0023] Figure 5 A schematic diagram of the coordination between a battery cell and a heat exchange device provided in some embodiments of the present application.

[0024] Figure 6 A schematic diagram of the structure of a heat exchange device provided in some embodiments of the present application.

[0025] Figure 7 A schematic diagram of the structure of the heat exchange body and the protrusion provided in some embodiments of the present application.

[0026] Figure 8 for Figure 7 BB cross-sectional view of the structure shown.

[0027] Description of reference numerals:

[0028] Vehicles - 1000;

[0029] Battery 100, housing 110, first part 111, second part 112, battery module 120, battery cell 121, end cap 122, housing 123, electrode assembly 124, electrode terminal 125, controller 200, motor 300;

[0030] Heat exchanger - 400;

[0031] Heat exchange body -10, center line -11, bearing plate -12, side plate -13, insulating heat conductive layer -14, protrusion -20, current collector -30. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0033] 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.

[0034] In the description of the embodiments of the present application, if the technical terms "first", "second", etc. appear, these terms are only used for descriptive purposes 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.

[0035] 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.

[0036] 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.

[0037] In the description of the embodiments of the present application, if the term "multiple" appears, "multiple" means at least two (including two), such as two, three, etc., unless otherwise clearly and specifically defined. Similarly, if the term "multiple groups" appears, "multiple groups" refers to more than two groups (including two groups), and if the term "multiple sheets" appears, "multiple sheets" refers to more than two sheets (including two sheets).

[0038] In the description of the embodiments of the present application, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does 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 cannot be understood as a limitation on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if the technical terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0042] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0043] Usually, the battery will emit heat during use, and a heat exchange device is required to ensure that the battery works at a suitable ambient temperature, thereby extending the battery's service life and charging and discharging efficiency. Specifically, the heat exchange scheme of laying a heat exchange device is mainly adopted in the battery cell. The heat of the battery cell is transferred to the heat exchange medium through the heat exchange device, and the heat exchange medium takes away the heat to achieve the purpose of cooling the battery. In the structure of the battery, the battery cell is often placed between two heat exchange devices. When the battery cell leaks electricity or liquid, it will not only cause the insulation failure of the adjacent battery cell, but also the battery cell will break down with the heat exchange device, which may cause a fire and explosion; and when the battery cell and the heat exchange device break down, the operator cannot accurately determine the location of the breakdown point, which is not conducive to the layout of protection and detection. Therefore, the breakdown position that cannot be determined may cause the battery to catch fire and explode at any time, resulting in poor safety performance of the battery 100.

[0044] In order to alleviate the problem of poor safety performance of the battery 100, considering that the end of the heat exchange body is often assembled with the current collector and does not directly contact the battery cell for heat dissipation, a corresponding breakdown portion can be provided on the heat exchange body. When the battery cell leaks electricity or liquid, the breakdown between the breakdown portion and the battery cell is carried out; thereby, the breakdown position of each heat exchange device can be effectively detected, thereby achieving effective detection and protection, and improving safety.

[0045] The embodiments of the present application provide a heat exchange device, a battery, and an electric device, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0046] It should be understood that the technical solutions generally described in the embodiments of the present application are not limited to the batteries and electrical devices described above, but can also be applied to all batteries including a box and electrical devices using batteries. However, for the sake of simplicity of description, an electrical device in an embodiment of the present application is taken as an example of vehicle 1000.

[0047] Please refer to Figure 1 , Figure 1A 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 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0048] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0049] Figure 2 An exploded view of a battery 100 provided for some embodiments of the present application; Figure 3 This is a schematic diagram of the structure of the battery module provided in some embodiments of the present application. Figure 2 and Figure 3 In order to meet different power requirements, the battery 100 may include a plurality of battery cells 121 and a housing 110. The battery cell 121 refers to the smallest unit constituting the battery module 120 or the battery pack. The plurality of battery cells 121 may be connected in series and / or in parallel via electrode terminals for various applications. The battery 100 mentioned in the present application is a battery pack. The housing 110 is used to accommodate the battery cells 121 or the battery module 120 to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 121.

[0050] The box 110 can adopt a variety of structures. In some embodiments, the box 110 can include a first part 111 and a second part 112, the first part 111 and the second part 112 cover each other, and the first part 111 and the second part 112 jointly define a storage space for accommodating the battery cell 121. The second part 112 can be a hollow structure with one end open, and the first part 111 can be a plate-like structure. The first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 can also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box 110 formed by the first part 111 and the second part 112 can be in a variety of shapes, such as a simple three-dimensional structure such as a single cuboid or a cylinder or a sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as a cuboid or a cylinder or a sphere, and the embodiments of the present application are not limited to this. The material of the box body 110 can be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, etc., or a composite material such as glass fiber and epoxy resin, and the implementation mode of the present application is not limited to this.

[0051] In the embodiment of the present application, multiple battery cells 121 can directly form a battery pack, or they can first form a battery module 120, and then the battery module 120 can form a battery pack. Specifically, multiple battery cells 121 can be directly connected in series, parallel or mixed together to form a whole, and then the whole formed by multiple battery cells 121 is accommodated in the box 110. Alternatively, multiple battery cells 121 can first be connected in series, parallel or mixed together to form a battery module 120, and then multiple battery modules 120 can be connected in series, parallel or mixed together to form a whole, and then accommodated in the box 110.

[0052] The battery 100 may further include other structures. For example, the battery 100 may further include a busbar component for achieving electrical connection between the plurality of battery cells 121 .

[0053] Each battery cell 121 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but it is not limited thereto. The battery cell 121 can be cylindrical, flat, rectangular or other shapes. The battery cells 121 are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the implementation method of the present application is not limited to this. However, for the sake of simplicity, the following embodiments are all described by taking the square lithium-ion battery cell 121 as an example.

[0054] Please refer to Figure 4 , Figure 4The schematic diagram of the exploded structure of the battery cell 121 provided in some embodiments of the present application. The battery cell 121 includes an end cap 122, a housing 123, an electrode assembly 124 and other functional components.

[0055] The end cap 122 refers to a component that covers the opening of the shell 123 to isolate the internal environment of the electrode assembly 124 from the external environment. Without limitation, the shape of the end cap 122 can be adapted to the shape of the shell 123 to match the shell 123. Optionally, the end cap 122 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 122 is not easily deformed when it is squeezed and collided, so that the battery cell 121 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 125 can be provided on the end cap 122. The electrode terminal 125 can be used to electrically connect to the electrode assembly 124 for outputting or inputting electrical energy of the battery cell 121. In some embodiments, the end cap 122 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 121 reaches a threshold. The material of the end cap 122 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 122 to isolate the electrical connection components in the housing 123 from the end cap 122 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0056] The shell 123 is a component used to cooperate with the end cap 122 to form the internal environment of the battery cell 121, wherein the formed internal environment can be used to accommodate the electrode assembly 124, the electrolyte and other components. The shell 123 and the end cap 122 can be independent components, and an opening can be set on the shell 123, and the internal environment of the battery cell 121 is formed by covering the opening with the end cap 122 at the opening. Without limitation, the end cap 122 and the shell 123 can also be integrated. Specifically, the end cap 122 and the shell 123 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 123, the end cap 122 covers the shell 123. The shell 123 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 123 can be determined according to the specific shape and size of the electrode assembly 124. The shell 123 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0057] The electrode assembly 124 is a component in the battery cell 121 where an electrochemical reaction occurs. One or more electrode assemblies 124 may be contained in the housing 123. The electrode assembly 124 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 124, and the parts of the positive and negative electrode sheets without active materials each constitute a pole ear (not shown). The positive pole ear and the negative pole ear may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the pole ear connects the electrode terminal 125 to form a current loop.

[0058] Figure 5 A schematic diagram of the coordination between a battery cell and a heat exchange device provided in some embodiments of the present application. Figure 6 A schematic diagram of the structure of a heat exchange device provided in some embodiments of the present application. Figure 7 A schematic diagram of the structure of the heat exchange body and the protrusion provided in some embodiments of the present application. Figure 8 for Figure 7 BB cross-sectional view of the structure shown.

[0059] See also Figures 5 to 8 As shown, the first aspect of the present application provides a heat exchange device 400 for carrying a battery cell 121 and providing a heat exchange function to ensure uniform heat exchange of the battery cell 121, thereby extending the service life and charging and discharging efficiency of the battery 100.

[0060] The heat exchange device 400 includes: a heat exchange body 10 and at least one protrusion 20. A heat exchange medium flows inside the heat exchange body 10. The protrusion 20 is arranged on the heat exchange body 10; the protrusion 20 is used to achieve fixed-point penetration with the battery cell.

[0061] Among them, the side wall of the heat exchange body 10 is usually used as the main wall structure for supporting the battery cell 121; a heat exchange medium flows inside the heat exchange body 10 for heat exchange with the battery cell 121. The heat exchange medium can be water, alcohol or other liquid mixtures. During the flow of the heat exchange medium inside the heat exchange body 10, it can effectively absorb the heat transferred from the side wall of the heat exchange body 10 to achieve heat dissipation and cooling, or it can transfer heat to the side wall of the heat exchange body 10 to achieve temperature increase.

[0062] The protrusion 20 is arranged on the heat exchange body 10. The number and position of the protrusion 20 can be adjusted as needed, and usually the protrusion 20 can be adjacent to the battery cell 121. The protrusion 20 protrudes from the surface of the heat exchange body 10. When the battery cell 121 carried on the heat exchange body 10 leaks electricity or liquid, the top of the protrusion 20 can form a relatively high electric field under the principle of tip discharge, and then the battery cell 121 can be punctured at a fixed point through the protrusion 20, so that the operator can accurately determine the location of the breakdown point, and can set corresponding protection and detection as needed, so as to find the safety hazard of leakage as early as possible, and cut off the power supply of the battery cell 121 with leakage through the management system of the battery 100 (not marked), to prevent overheating and runaway, and avoid the battery 100 from catching fire and exploding, effectively improving the safety performance of the battery 100.

[0063] Optionally, the protrusion 20 may be made of aluminum, aluminum alloy, steel, or steel alloy; in this way, it has better electrical conductivity.

[0064] Optionally, the end of the protrusion 20 away from the heat exchange body 10 is in a smooth spherical shape. In this way, the top of the protrusion 20 away from the heat exchange body 10 can form a relatively high electric field under the principle of tip discharge, and then the battery cell 121 can be penetrated at a fixed point through the protrusion 20, so that the operator can accurately determine the location of the breakdown point.

[0065] In addition, the protrusion 20 adopts a smooth spherical shape to avoid damaging the shell of the battery cell 121 during the installation process, thereby ensuring safety.

[0066] In some possible embodiments, see Figures 5 to 8 As shown, the heat exchange body 10 includes two relatively large-area bearing plates 12 and two relatively small-area side plates 13; the two bearing plates 12 are used to bear the battery cells; the two side plates 13 are respectively connected to the two sides of the two bearing plates 12 to enclose a heat exchange channel for the heat exchange medium to flow. A protrusion 20 is provided on the outer side of at least one bearing plate 12 away from the heat exchange channel.

[0067] The heat exchange body 10 is a plate structure with a flat cross section. The bearing plate 12 is usually a horizontal plate surface or a nearly horizontal curved surface. The bearing plates 12 on one or both sides of the heat exchange body 10 can be used to bear the battery cells 121, and the side plates 13 can be curved surfaces to improve the overall rigidity and prevent the battery cells 121 from being crushed due to their weight.

[0068] By providing a protrusion 20 on the outer side surface of at least one supporting plate 12 away from the heat exchange channel; the outer side surface of the supporting plate 12 with the protrusion 20 can be used to support the battery cell 121. When the battery cell 121 leaks electricity or liquid, the battery cell 121 can be punctured at a fixed point through the protrusion 20, so that the operator can accurately determine the location of the breakdown point, and can set corresponding protection and detection as needed, so as to discover the safety hazard of leakage as early as possible, and cut off the power to the battery cell 121 that leaks electricity or liquid through the management system of the battery 100, so as to prevent overheating and runaway, and avoid the battery 100 from catching fire and exploding, thereby effectively improving the safety performance of the battery 100.

[0069] In some possible embodiments, see Figure 5 and Figure 6 As shown, the heat exchange device includes a plurality of protrusions 20; the heat exchange body 10 includes a center line 11 extending along the flow direction of the heat exchange medium; all the protrusions 20 are symmetrically distributed on the two side areas of the supporting plate 12 along the center line 11, and two adjacent protrusions 20 are spaced apart from each other.

[0070] In this way, the protrusions 20 are evenly distributed on both sides of the carrier plate 12. When the carrier plate 12 carries the battery cell 121, the top and bottom of the battery cell 121 can be close to each protrusion 20 respectively. When the top or bottom of the battery cell 121 leaks electricity or liquid, the corresponding protrusion 20 and the top / bottom of the battery cell 121 can achieve fixed-point penetration, so that the operator can accurately determine the location of the breakdown point, and ultimately prevent the battery cell 121 from overheating and runaway, avoid fire and explosion, and effectively improve the safety performance of the battery 100.

[0071] In some possible embodiments, see Figure 5 and Figure 7 As shown, the heat exchange device includes four protrusions 20; the four protrusions 20 are respectively arranged on the four corners of the carrier plate 12. In this way, the protrusions 20 are evenly distributed in the four corners of the carrier plate 12. When the carrier plate 12 carries the battery cell 121, the four corners of the battery cell 121 can be close to each protrusion 20. When the battery cell 121 leaks electricity or liquid, the protrusion 20 closest to it can achieve fixed-point penetration with the battery cell 121, so as to find the safety hazard of leakage as early as possible, and the battery cell 121 with leakage is powered off through the management system of the battery 100 to prevent overheating and runaway, avoid battery fire and explosion, and effectively improve the safety performance of the battery 100.

[0072] In some possible embodiments, see Figure 8As shown, along the thickness direction of the heat exchange body 10, the height of the protrusion 20 protruding from the surface of the carrier plate 12 is A, and satisfies 2 millimeters (mm) ≤ A ≤ 5 millimeters (mm). For example, the height A can be any one of 2.0mm, 2.3mm, 3.0mm, 3.8mm, 4.4mm, 4.9mm and 5.0mm, which is not limited in the embodiments of the present application. In this way, when the battery cell 121 carried on the heat exchange body 10 leaks electricity or liquid, the top of the protrusion 20 can form a relatively high electric field under the principle of tip discharge, which is convenient for achieving fixed-point penetration.

[0073] In some possible embodiments, see Figures 5 to 8 As shown, the heat exchange device includes a current collector 30, which is arranged on the end of the heat exchange body 10 along the flow direction of the heat exchange medium. The current collector 30 is used to lead the heat exchange medium out of or into the heat exchange body 10; the protrusion 20 is arranged in the middle area of ​​the supporting plate 12 not covered by the current collector 30.

[0074] Specifically, the current collector 30 is arranged at the end of the heat exchange body 10 and is used to connect the external pipeline to input or output the heat exchange medium. The current collector 30 includes a current collector body, and the current collector body cover is arranged on the heat exchange body 10. Specifically, two groups of current collectors 30 can be provided to be matched with the two ends of the heat exchange body 10 respectively, and are interconnected with the heat exchange channel inside the heat exchange body 10; the area where the current collector body of the current collector 30 and the heat exchange body 10 are sleeved is usually not used to place the battery cell 121; in this way, the heat exchange medium enters one end of the heat exchange channel through the current collector 30 at one end of the heat exchange body 10, and circulates in the heat exchange channel, so that the heat exchange body 10 can provide heat exchange for the battery cell 121 to ensure that the battery cell 121 works at a suitable ambient temperature; the heat exchange medium after exchanging heat flows back from the other end of the heat exchange channel to the current collector 20 at the other end, realizing the circulation of the heat exchange medium.

[0075] The raised portion 20 is arranged in the middle area of ​​the supporting plate 12 that is not covered by the current collector 30; in this way, it can be ensured that the raised portion 20 is close to the battery cell 121. When the battery cell 121 supported on the heat exchange body 10 leaks electricity or liquid, the raised portion 20 can achieve fixed-point penetration with the battery cell 121, thereby facilitating the operator to discover the leakage as early as possible, and to cut off the power to the battery cell 121 that has leaked electricity or liquid through the management system of the battery 100, to prevent overheating and runaway, and to avoid fire and explosion of the battery 100, thereby effectively improving the safety performance of the battery 100.

[0076] In some possible embodiments, see Figures 5 to 8 As shown, the heat exchange body 10 is a harmonica tube, which has good heat exchange performance. In addition, the heat exchange body 10 can also be a profile liquid heat exchange plate or a stamping liquid heat exchange plate, which is not limited in the application embodiment.

[0077] In some possible embodiments, see Figures 5 to 8 As shown, the heat exchange body 10 is made of aluminum, aluminum alloy, steel, or steel alloy; it has good strength, light weight and good thermal conductivity.

[0078] In addition, the surface of the heat exchange body 10 may be covered with an insulating heat conductive layer 14. The insulating heat conductive layer 14 has good thermal conductivity and insulation properties. In this way, the heat exchange body 10 and the battery cell 121 can be kept insulated during the heat exchange process. When the battery cell 121 leaks electricity or liquid, the insulating heat conductive layer 14 can prevent the heat exchange body 10 and the battery cell 121 from being electrically connected. The battery cell 121 and the corresponding protrusion 20 can achieve fixed-point penetration, which is convenient for the operator to accurately determine the location of the breakdown point, and can set corresponding protection and detection as needed, so as to discover the safety hazard of leakage as early as possible, effectively improving the safety performance of the battery 100.

[0079] Optionally, the insulating heat-conducting layer 14 may be an alumina ceramic layer or a polyimide film layer. Of course, the insulating heat-conducting layer 14 may also be made of other materials with good insulating and thermal conductivity, which is not limited in the present application.

[0080] Optionally, the heat exchange body 10 may also be a plastic tube shell, which is subject to the specific design.

[0081] In some possible embodiments, see Figures 5 to 8 As shown, the protrusion 20 is integrally connected to the heat exchange body 10; it can be processed in one step by stamping, casting, etc., with high strength and simple process.

[0082] In some possible embodiments, see Figures 5 to 8 As shown, the protrusion 20 and the heat exchange body 10 can be processed separately and connected as a whole by welding; the processing is simple and the cost is low.

[0083] A second aspect of the present application provides a battery 100, referring to Figures 1 to 8 As shown, the battery 100 includes a battery cell 121, a management system (not shown) and the above-mentioned heat exchange device 400. The management system is connected to the protrusion 20 by signals; and the side wall of at least one side of the heat exchange body 10 is heat-conductingly connected to the battery cell 121.

[0084] Among them, the side wall of at least one side of the heat exchange body 10 is heat-conductively connected to the battery cell 121 for heat exchange, so that the battery cell 121 can work at a suitable temperature. When the battery cell 121 carried on the heat exchange body 10 leaks electricity or liquid, the top of the protrusion 20 can form a relatively high electric field under the principle of tip discharge, and then the battery cell 121 can achieve fixed-point penetration through the protrusion 20. The management system is connected to the protrusion 20 signal, and the protrusion 20 transmits an electrical signal to the management system to facilitate the operator to accurately determine the location of the breakdown point, and can set corresponding protection and detection as needed, so as to discover the safety hazard of leakage as early as possible, and the battery 100 management system (not marked) is used to cut off the power supply of the battery cell 121 that leaks electricity or liquid, to prevent overheating and runaway, and avoid the battery 100 from catching fire and exploding, effectively improving the safety performance of the battery 100.

[0085] A third aspect of the present application provides an electrical device, comprising the above-mentioned battery 100; the battery 100 is used to provide electrical energy to the electrical device.

[0086] Optionally, the electrical device in the embodiment of the present application may be an energy storage cabinet.

[0087] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A heat exchange device, characterized in that: include: A heat exchange body (10) having a heat exchange medium flowing therein; and at least one protrusion (20) arranged on the heat exchange body (10); the protrusion (20) is used to achieve fixed-point penetration with the battery cell.

2. The heat exchange device according to claim 1, characterized in that: The heat exchange body (10) comprises two relatively large-area bearing plates (12) and two relatively small-area side plates (13); the two bearing plates (12) are used to bear the battery cells; the two side plates (13) are respectively connected to two sides of the two bearing plates (12) to enclose and form a heat exchange channel for the heat exchange medium to flow; The protrusion (20) is provided on the outer side of at least one of the supporting plates (12) facing away from the heat exchange channel.

3. The heat exchange device according to claim 2, characterized in that: The heat exchange device comprises a plurality of protrusions (20); the heat exchange body (10) comprises a center line (11) extending along the flow direction of the heat exchange medium; All of the protrusions (20) are symmetrically distributed on two side regions of the carrying plate (12) along the center line (11), and two adjacent protrusions (20) are spaced apart from each other.

4. The heat exchange device according to claim 2, characterized in that: The heat exchange device comprises four protrusions (20); The four protrusions (20) are respectively arranged on four corner areas of the carrying plate (12).

5. The heat exchange device according to claim 2, characterized in that: The protrusion (20) has a protrusion height A from the surface of the carrying plate (12), and satisfies 2 mm ≤ A ≤ 5 mm.

6. The heat exchange device according to claim 2, characterized in that: The heat exchange device comprises a current collector (30), the current collector (30) being arranged at an end of the heat exchange body (10) along a flow direction of a heat exchange medium, the current collector (30) being used to lead the heat exchange medium out of or into the heat exchange body (10); The protrusion (20) is arranged in a middle area of ​​the carrier plate (12) that is not covered by the current collector (30).

7. The heat exchange device according to any one of claims 1 to 6, characterized in that: The heat exchange body (10) is a harmonica tube; and / or, The heat exchange body (10) is made of aluminum, aluminum alloy, steel, or steel alloy; and / or, The surface of the heat exchange body (10) is covered with an insulating heat-conducting layer (14).

8. The heat exchange device according to any one of claims 1 to 6, characterized in that: The protrusion (20) is integrally connected to the heat exchange body (10); Alternatively, the protrusion (20) is connected to the heat exchange body (10) by welding.

9. The heat exchange device according to any one of claims 1 to 6, characterized in that: The protrusion (20) is made of aluminum, aluminum alloy, steel, or steel alloy; and / or, One end of the protrusion (20) away from the heat exchange body (10) is in a smooth spherical shape.

10. A battery, characterized in that: It comprises a battery cell, a management system and a heat exchange device as claimed in any one of claims 1 to 9; The management system is connected to the protruding portion (20) by signal; The side wall of at least one side of the heat exchange body (10) is heat-conductingly connected to the battery cell.

11. An electrical device, characterized in that: Comprising the battery as claimed in claim 10.

12. The electrical device according to claim 11, characterized in that: The electrical device is an energy storage cabinet.

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