Heat exchange device, battery device and electric device

Abstract

The utility model is suitable for the technical field of batteries, and provides a heat exchange device, a battery device and a power utilization device. The battery monomer assembly is arranged in the box body; the refrigerant heat exchange component is connected to the box body, the refrigerant heat exchange component is connected to the box body, the refrigerant heat exchange component comprises a first plate body and a second plate body which are arranged in a stacked mode and connected with each other, the first plate body is provided with a flow channel part protruding back on to the second plate body, and the flow channel part and the second plate body define a heat exchange flow channel; the protection plate is located on the side, back on to the second plate body, of the first plate body, a concave structure is arranged on the face, facing the refrigerant heat exchange component, of the protection plate, and at least part of the flow channel part is located in the concave structure and attached to the concave structure. According to the battery device provided by the embodiment of the invention, the refrigerant heat exchange part can be protected by utilizing the protection plate, so that the risk that the heat exchange runner is damaged is reduced, and the reliability of the battery device is improved.

Description

[0001] This application claims priority to the Chinese Patent Application No.

[0002] 202420907842.4, entitled "Heat Exchange Device, Battery and Electric Device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of battery, in particular to a heat exchange device, a battery device and an electric device. BACKGROUND

[0004] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development.

[0005] In the development of battery technology, how to improve the reliability of the battery is an important research direction in battery technology. Practical new type content

[0006] Therefore, the present application provides a heat exchange device, a battery device and an electric device, which can improve the reliability of the battery device.

[0007] The first aspect of the present application provides a battery device, comprising: a box body; a battery monomer assembly arranged in the box body; a refrigerant heat exchange component connected to the box body, the refrigerant heat exchange component comprising a first plate body and a second plate body stacked and connected, the first plate body having a flow channel portion protruding away from the second plate body, the flow channel portion and the second plate body forming a heat exchange flow channel; a protective plate located on the side of the first plate body away from the second plate body, one side of the protective plate facing the refrigerant heat exchange component being provided with a recess structure, at least part of the flow channel portion being located in the recess structure and being attached to the recess structure.

[0008] The battery device provided by the embodiments of the present application comprises a box body, a battery monomer assembly, a refrigerant heat exchange component and a protective plate. The refrigerant heat exchange component comprises a first plate body and a second plate body. A flow channel part on the first plate body and the second plate body jointly form a heat exchange flow channel. The problem that the performance of the battery device is affected due to the excessively high temperature of the battery monomer assembly is solved. The protective plate is located on the side of the first plate body away from the second plate body. The protective plate can resist at least part of the impact force to protect the refrigerant heat exchange component. The recess structure on the protective plate can accommodate the flow channel part. The recess structure can disperse the stress on the flow channel part, thereby reducing the risk of damage to the heat exchange flow channel. Therefore, the protective plate reduces the impact of external force on the refrigerant heat exchange component under the conditions of scraping the bottom and knocking, reduces the risk of damage and blockage of the heat exchange flow channel, and improves the reliability of the refrigerant heat exchange component and the battery device.

[0009] In some embodiments, the recess structure comprises a plurality of recessed parts, each of which is used to accommodate a part of the flow channel part. The part of the protective plate between adjacent recessed parts is in contact with the refrigerant heat exchange component.

[0010] By adopting the above technical solution, the protective plate can accommodate different parts of the flow channel part through a plurality of recessed parts, and the part between adjacent recessed parts can protect the refrigerant heat exchange component. When the bottom of the battery device is impacted by external force, the protective plate can reduce the stress concentration on the flow channel part, thereby reducing the risk of deformation of the refrigerant heat exchange component and damage to the heat exchange flow channel.

[0011] In some embodiments, the part of the protective plate between adjacent recessed parts is in close contact with the refrigerant heat exchange component to support the refrigerant heat exchange component.

[0012] By adopting the above technical solution, the part of the protective plate between adjacent recessed parts has a good supporting effect on the refrigerant heat exchange component, thereby improving the protection effect.

[0013] In some embodiments, the surface of at least one recessed part towards the first plate body is in close contact with and has the same shape as the surface of the corresponding flow channel part away from the second plate body.

[0014] By adopting the above technical solution, the recessed part can protect the part of the flow channel part it accommodates. The recessed part and the part of the flow channel part are shaped similarly. The recessed part can more easily disperse the stress on the flow channel part, thereby having a better protection effect on the heat exchange flow channel.

[0015] In some embodiments, the flow channel portion comprises a plurality of sub-flow channel portions arranged in parallel, the sub-flow channel portions comprise a branch flow channel portion and a plurality of sub-flow channel portions connected to the branch flow channel portion, the plurality of sub-flow channel portions are sequentially connected, the sub-flow channel portions extend along a first direction, and the plurality of sub-flow channel portions are arranged along a second direction, the second direction intersects the first direction; at least part of the branch flow channel portion is located in the plurality of recessed portions, and at least one of the recessed portions is in close contact with the branch flow channel portion.

[0016] By adopting the above technical solution, each sub-flow channel can independently circulate refrigerant, and the refrigerant heat exchange effect of the entire refrigerant heat exchange component is not easily affected by the blockage of a certain part of the heat exchange flow channel, thereby improving the reliability of the refrigerant heat exchange component. In addition, the recessed portion can accommodate at least part of the branch flow channel portion, thereby reducing the risk of damage to the branch flow channel portion.

[0017] In some embodiments, the branch flow channel portion comprises an inflow branch flow channel portion and an outflow branch flow channel portion, the inflow branch flow channel portion, the plurality of sub-flow channel portions, and the outflow branch flow channel portion are sequentially connected; the plurality of recessed portions comprises a first recessed portion, at least part of the inflow branch flow channel portion is located in the first recessed portion and is in close contact with the first recessed portion; and / or the plurality of recessed portions comprises a second recessed portion, at least part of the outflow branch flow channel portion is located in the second recessed portion and is in close contact with the second recessed portion.

[0018] By adopting the above technical solution, stress concentration on the inflow branch flow channel portion and / or the outflow branch flow channel portion can be reduced, and the risk of damage to the inflow branch flow channel portion and / or the outflow branch flow channel portion can be reduced.

[0019] In some embodiments, the flow channel portion further comprises a main inflow flow channel portion and a main outflow flow channel portion, the main inflow flow channel portion is in communication with the plurality of inflow branch flow channel portions, and the main outflow flow channel portion is in communication with the plurality of outflow branch flow channel portions; the plurality of recessed portions comprises a third recessed portion, at least part of the main inflow flow channel portion is located in the third recessed portion and is in close contact with the third recessed portion; and / or the plurality of recessed portions comprises a fourth recessed portion, at least part of the outflow branch flow channel portion is located in the fourth recessed portion and is in close contact with the fourth recessed portion.

[0020] By adopting the above technical solution, the protection plate can provide protection for the main inflow flow channel portion and the main outflow flow channel portion, thereby improving the reliability of the refrigerant heat exchange component.

[0021] In some embodiments, the refrigerant heat exchange component has a functional area, a distribution area and a peripheral area, the functional area and the distribution area are arranged side by side, and the functional area and the distribution area are located in the peripheral area; a plurality of sub-flow channel portions are arranged in the functional area, a plurality of branch flow channel portions are arranged in the distribution area, and the protective plate is at least arranged in close contact with the distribution area.

[0022] By adopting the above technical solution, the protective plate can at least protect the distribution area, reduce the risk of heat exchange failure of the refrigerant heat exchange component, and has a good protection effect.

[0023] In some embodiments, the protective plate is provided with a groove on the side facing the refrigerant heat exchange component, and the orthographic projection of the functional area towards the protective plate at least partially falls in the groove.

[0024] By adopting the above technical solution, the protective plate is provided with a recess structure and a groove, the recess structure can be shaped with the distribution area to protect the distribution area, and the groove can accommodate at least part of the sub-flow channel to protect the functional area, so that the protective plate can comprehensively protect the refrigerant heat exchange component.

[0025] In some embodiments, the protective plate is provided with a hollow portion, and the orthographic projection of the functional area towards the protective plate at least partially falls in the hollow portion.

[0026] By adopting the above technical solution, the material cost of the protective plate is reduced, and the weight of the battery device is reduced.

[0027] In some embodiments, the protective plate includes one or more sub-protective plates, and the sub-protective plates are connected to the first plate body and cover part of the first plate body.

[0028] By adopting the above technical solution, the structure of the protective plate can be flexibly set to protect the corresponding area on the corresponding refrigerant heat exchange component.

[0029] In some embodiments, the sub-protective plate and the part of the first plate body covered thereby have the same shape.

[0030] By adopting the above technical solution, the recess structure on the sub-protective plate can better disperse the stress on the refrigerant heat exchange component, and the protection effect is better.

[0031] In some embodiments, the protective plate is one of a metal piece, a plastic piece and a carbon fiber piece.

[0032] By adopting the above technical solution, the protective plate can be made of a variety of high-strength materials, which is easy to manufacture.

[0033] In some embodiments, the protective plate and the refrigerant heat exchange component are connected by welding, fasteners or one-piece injection.

[0034] By adopting the technical scheme, the protection plate can be stably attached to the bottom of the refrigerant heat exchange component, and the connection reliability between the protection plate and the refrigerant heat exchange component is good.

[0035] In some embodiments, the battery device further comprises a bottom guard plate, which is arranged on the side of the protection plate away from the refrigerant heat exchange component.

[0036] By adopting the technical scheme, the bottom guard plate is arranged at the bottom of the refrigerant heat exchange component and the protection plate, which can further reduce the risk of deformation of the refrigerant heat exchange component caused by external force impact.

[0037] In some embodiments, the box body comprises a box body and an upper cover, and the two ends of the box body are respectively provided with openings. The upper cover and the refrigerant heat exchange component cover the openings at the two ends of the box body, respectively. The refrigerant heat exchange component and the battery monomer assembly are bonded by heat-conducting glue.

[0038] By adopting the technical scheme, the structure of the battery device is simplified, the refrigerant heat exchange component can directly exchange heat with the battery monomer assembly, the heat exchange efficiency is high, the heat exchange effect is high, and the reliability of the battery device is effectively improved.

[0039] In some embodiments, the heat exchange flow channel is used for refrigerant circulation.

[0040] By adopting the technical scheme, the battery device can reduce the risk of damage and blockage of the heat exchange flow channel in the direct cooling plate.

[0041] Embodiments of the second aspect of the application provide a heat exchange device, comprising: a refrigerant heat exchange component, comprising a first plate body and a second plate body arranged in layers and connected, the first plate body having a flow channel portion protruding away from the second plate body, the flow channel portion and the second plate body forming a heat exchange flow channel; a protection plate located on the side of the first plate body away from the second plate body, one side of the protection plate facing the refrigerant heat exchange component being provided with a recessed structure, at least part of the flow channel portion being located in the recessed structure and being attached to the recessed structure.

[0042] Embodiments of the third aspect of the application provide a power utilization device, comprising the battery device provided by the first aspect or the heat exchange device provided by the second aspect, the battery device being used to provide electric energy.

[0043] The above description is only a summary of the technical scheme of the application. In order to more clearly understand the technical means of the application, the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0044] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0046] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0047] Figure 3 This is an exploded perspective view of a battery cell provided in an embodiment of this application;

[0048] Figure 4 An exploded perspective view of a refrigerant heat exchange component provided in an embodiment of this application;

[0049] Figure 5 An exploded perspective view of a refrigerant heat exchange component and a protective plate provided in an embodiment of this application;

[0050] Figure 6 An exploded perspective view of the first plate and the protective plate in a refrigerant heat exchange component provided in another embodiment of this application;

[0051] Figure 7 for Figure 6 A top view of the protective panel shown;

[0052] Figure 8 An exploded perspective view of the first plate and the protective plate provided in another embodiment of this application;

[0053] Figure 9 for Figure 8 The bottom view of the first plate and the protective plate shown;

[0054] Figure 10 for Figure 9 The first plate and the protective plate shown are cross-sectional views along line AA.

[0055] Figure 11 for Figure 10 A magnified view of part B in the middle.

[0056] The markings in the diagram mean:

[0057] 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor;

[0058] 10. Box body; 11. Top cover; 12. Box body;

[0059] 20, battery cell assembly; 21, battery cell; 211, shell; 212, end cap; 213, electrode assembly; 214, electrode terminal; 215, pressure relief mechanism;

[0060] 30, refrigerant heat exchange component; 31, first plate body; 32, second plate body; 33, heat exchange joint; 301, functional area; 302, shunt area; 303, peripheral area; 34, heat exchange flow channel;

[0061] 35, flow channel part; 351, shunt channel part; 3511, branch channel part; 3511a, inflow branch channel part; 3511b, return flow branch channel part; 3512, sub-flow channel part; 352, main inflow channel part; 353, main outflow channel part;

[0062] 40, guard plate; 41, recess structure; 411, recess part; 411a, first recess part; 411b, second recess part; 411c, third recess part; 411d, fourth recess part; 42, groove; 43, hollow part; 401, sub-guard plate; 50, bottom guard plate. DETAILED DESCRIPTION

[0063] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof used in the specification and the claims and the above description of drawings are intended to cover the non-exclusive inclusion.

[0065] 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. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0066] In this paper, the phrase "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0067] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0068] In the description of the embodiments of the present application, the term "a plurality of" means two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).

[0069] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled 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.

[0070] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0071] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited in this regard.

[0072] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component.

[0073] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells.

[0074] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0075] In some embodiments, the battery device can be a battery pack including a case and one or more battery cell assemblies housed in the case.

[0076] As an example, the battery cell assembly can be a battery module, which can be housed in the case by fixing the battery module in the case.

[0077] As an example, the battery cell assembly can also be housed in the case by fixing a plurality of battery cells directly in the case.

[0078] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, batteries play an irreplaceable important role as the power source of electric vehicles. Among them, the battery as a core component of new energy vehicles has a high requirement in reliability.

[0079] Fast charging is a mainstream solution for new energy vehicles to achieve fast energy replenishment. In the implementation process, many challenges are encountered. During the fast charging process, the battery cells will generate a large amount of heat, which will cause the internal temperature of the battery to rise sharply, thereby affecting the performance and service life of the battery, and affecting the reliability of the battery.

[0080] Therefore, some batteries are provided with a refrigerant heat exchange component for heat management of the battery. The refrigerant heat exchange component is provided with a flow channel for the flow of refrigerant to adjust the temperature inside the battery. The refrigerant heat exchange component is usually arranged at the bottom of the vehicle. However, during the driving process of the vehicle, the bottom is easily scratched, bumped, and the like, so that the flow channel is damaged to some extent, which increases the temperature difference of different regions of the refrigerant heat exchange component, and even causes the refrigerant heat exchange component to fail, affecting the heat management effect and reliability of the battery.

[0081] Based on the above considerations, in order to improve the reliability of the battery, one or more embodiments of the present application provide a battery device including a case, a battery cell assembly, a refrigerant heat exchange component, and a protective plate. The refrigerant heat exchange component includes a first plate body and a second plate body stacked and connected. The first plate body has a flow channel portion protruding toward the second plate body. The flow channel portion and the second plate body form a heat exchange flow channel. The protective plate is located on the side of the first plate body away from the second plate body. One side of the protective plate facing the refrigerant heat exchange component is provided with a recess structure. At least part of the flow channel portion is located in the recess structure and is attached to the recess structure.

[0082] In the scheme provided in the embodiments of the present application, the protection plate is connected to the bottom of the refrigerant heat exchange component, and at least part of the flow channel part is located in the recess structure and is attached to the recess structure. In this way, the recess structure of the protection plate can protect the flow channel part and disperse the stress on the flow channel part, so that the protection plate can protect the heat exchange flow channel, reduce the impact force of external force on the heat exchange flow channel in the case of scraping the bottom or bumping, and further reduce the risk of damage, deformation and blockage of the heat exchange flow channel, thereby improving the reliability of the refrigerant heat exchange component and the battery device.

[0083] The technical schemes described in the embodiments of the present application are applicable to various battery monomer using electric devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The following embodiments are described with a vehicle as an example for convenience of description.

[0084] Please refer to Figure 1 , Figure 1 The structural schematic diagram of the vehicle 1000 provided in some embodiments of the present application is shown. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom or the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation and driving.

[0085] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0086] Please refer to Figure 2 and Figure 3The battery device 100 includes a box body 10 and a battery cell assembly 20. The box body 10 includes an upper cover 11 and a box body 12. The upper cover 11 and the box body 12 are mutually covered. The upper cover 11 and the box body 12 jointly define a containing space for containing battery cells 21. The box body 12 can be a hollow structure with one end open. The upper cover 11 can be a plate structure. The upper cover 11 covers the open side of the box body 12, so that the upper cover 11 and the box body 12 jointly define the containing space. The upper cover 11 and the box body 12 can also be hollow structures with one side open. The open side of the upper cover 11 covers the open side of the box body 12. Of course, the box body 10 formed by the upper cover 11 and the box body 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0087] The battery cell assembly 20 is usually formed by arranging a plurality of battery cells 21. The battery cell 21 is the smallest unit of the battery device 100. The battery cell 21 includes a shell 211, an end cover 212, an electrode assembly 213, and other functional components.

[0088] The end cover 212 refers to a component that covers the opening of the shell 211 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cover 212 can be adapted to the shape of the shell 211 to fit the shell 211. Alternatively, the end cover 212 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the end cover 212 is not easily deformed when subjected to extrusion and collision, so that the battery cell 21 can have higher structural strength and use reliability can also be improved. The end cover 212 can be provided with functional components such as electrode terminals 214 and pressure relief mechanisms 215. The electrode terminals 214 can be used to electrically connect with the electrode assembly 213 for outputting or inputting the electrical energy of the battery cell 21. In some embodiments, the pressure relief mechanism 215 is used to release the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold value. The material of the end cover 212 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The embodiments of the present application do not make special limitations on this. In some embodiments, an insulating member can also be provided on the inner side of the end cover 212 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0089] The housing 211 is a component for fitting the end cover 212 to form an internal environment of the battery cell 21, where the formed internal environment can be used to accommodate the electrode assembly 213, electrolyte, and other components. The housing 211 and the end cover 212 can be independent components, and an opening can be provided on the housing 211, and the end cover 212 is fitted to cover the opening to form the internal environment of the battery cell 21. Without limitation, the end cover 212 and the housing 211 can also be integrated, specifically, the end cover 212 and the housing 211 can be formed as a common connecting surface before other components are put into the housing, and when it is necessary to seal the inside of the housing 211, the end cover 212 is fitted to cover the housing 211. The housing 211 can be of various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the housing 211 can be determined according to the specific shape and size of the electrode assembly 213. The material of the housing 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations on this.

[0090] The electrode assembly 213 is a component where electrochemical reactions occur in the battery cell 21. One or more electrode assemblies 213 can be contained in the housing 211. The electrode assembly 213 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion with active material constituting a main body of the electrode assembly 213, and a portion without active material of the positive electrode sheet and the negative electrode sheet respectively constituting a tab. The positive tab and the negative tab can be located together at one end of the main body or respectively at both ends of the main body. In the charging and discharging process of the battery device 100, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminal 214 to form a current loop. In some embodiments, a pressure relief mechanism 215 is provided on one side of the battery cell 21, where the pressure relief mechanism 215 refers to an element or component that is actuated to release the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold.

[0091] Please refer to Figure 2 , Figure 4 and Figure 5In the first aspect, the embodiments of the present application provide a battery device 100, comprising a box 10, a battery cell assembly 20, a refrigerant heat exchange component 30 and a protective plate 40. The battery cell assembly 20 is arranged in the box 10, and the refrigerant heat exchange component 30 is connected to the box 10. The refrigerant heat exchange component 30 comprises a first plate body 31 and a second plate body 32 which are arranged in a stack and connected. The first plate body 31 has a flow channel portion 35 protruding away from the second plate body 32. The flow channel portion 35 and the second plate body 32 enclose a heat exchange flow channel 34. The protective plate 40 is arranged on the side of the first plate body 31 away from the second plate body 32. The protective plate 40 has a recessed structure 41 on the side facing the refrigerant heat exchange component 30. At least part of the flow channel portion 35 is arranged in the recessed structure 41 and is attached to the recessed structure 41.

[0092] The box 10 is used to accommodate the battery cell assembly 20. For example, the box 10 comprises an upper cover 11 and a box body 12. The upper cover 11 and the box body 12 enclose a space for accommodating the battery cell assembly 20.

[0093] The battery cell assembly 20 comprises a plurality of battery cells 21. For example, the battery cell assembly 20 comprises a plurality of battery cells 21 arranged in a first direction X. A plurality of battery cell assemblies 20 are arranged in a second direction Y. The battery cells 21 are arranged in an array. The second direction Y intersects the first direction X. Optionally, the first direction X can be the length direction of the box 10, and the second direction Y can be the width direction of the box 10. In other embodiments, the first direction X and / or the second direction Y can be obliquely intersected with the length direction of the box 10.

[0094] The refrigerant heat exchange component 30 is used to accommodate refrigerant to regulate the temperature of the battery cell assembly 20. The battery cell assembly 20 generates heat during the circulation process. The refrigerant heat exchange component 30 can be used to cool the battery cell assembly 20. The refrigerant heat exchange component 30 can also be referred to as a cooling piece, a cooling system, a cold plate, etc. Of course, in some cases, the refrigerant heat exchange component can also be used to heat the battery cell assembly 20, which will not be described here.

[0095] The refrigerant heat exchange component 30 can be directly connected to the battery cell assembly 20 or indirectly connected to the battery cell assembly 20, as long as it can exchange heat with the battery cell assembly 20. In some embodiments, the refrigerant heat exchange component 30 is connected to the bottom of the box 10. For example, the box 10 comprises an upper cover 11 and a box body 12. The refrigerant heat exchange component 30 is connected to the side of the box body 12 away from the upper cover 11. The refrigerant heat exchange component 30 can be arranged inside the box 10, outside the box 10, or as a lower cover of the box body 12. In this case, the two ends of the box body 12 are open, and the upper cover 11 and the refrigerant heat exchange component 30 are arranged on the two sides of the box body 12, respectively.

[0096] The refrigerant heat exchange component 30 comprises a first plate body 31 and a second plate body 32 connected with each other. The first plate body 31 is provided with an unsealed flow channel part 35. The flow channel part 35 protrudes towards the second plate body 32, and the side of the flow channel part 35 relative to the first plate body 31 towards the second plate body 32 is recessed. The first plate body 31 and the second plate body 32 are connected to seal the flow channel part 35, i.e., the flow channel part 35 and the second plate body 32 form a heat exchange flow channel 34.

[0097] The heat exchange flow channel 34 refers to a flow channel for refrigerant flow.

[0098] The protection plate 40 is used to protect the refrigerant heat exchange component 30, especially the heat exchange flow channel 34 in the refrigerant heat exchange component 30. The protection plate 40 can be connected to the refrigerant heat exchange component 30 by welding, fastening, or the like. The protection plate 40 is located on the side of the first plate body 31 away from the second plate body 32, i.e., the protection plate 40 is located at the bottom of the refrigerant heat exchange component 30. When the battery device 100 is installed in an electric device such as a vehicle, the height of the first plate body 31 is lower than the height of the second plate body 32, and the height of the protection plate 40 is lower than the height of the refrigerant heat exchange component 30.

[0099] The side of the protection plate 40 towards the refrigerant heat exchange component 30 is provided with a recess structure 41. The flow channel part 35 protrudes, and the recess structure 41 can accommodate at least part of the flow channel part 35 to protect the flow channel part 35 of the refrigerant heat exchange component 30 and improve the structural stability of the refrigerant heat exchange component 30.

[0100] During use, the bottom of the battery device 100 can be impacted by external force. The flow channel part 35 protrudes, so that the flow channel part 35 has a stress concentration problem and is prone to damage. In the embodiment, at least part of the flow channel part 35 is located in the recess structure 41 and adheres to the recess structure 41. The recess structure 41 can disperse the stress on the flow channel part 35 towards other areas of the protection plate 40, solve the stress concentration problem of the flow channel part 35, and reduce the risk of damage to the flow channel 311.

[0101] The battery device 100 provided by the embodiments of the present application comprises a box body 10, a battery monomer assembly 20, a refrigerant heat exchange component 30 and a protective plate 40. The refrigerant heat exchange component 30 comprises a first plate body 31 and a second plate body 32. A flow channel part 35 on the first plate body 31 and the second plate body 32 jointly form a heat exchange flow channel 34. The temperature of the battery monomer assembly 20 is adjusted by the refrigerant in the heat exchange flow channel 34, so that the problem that the performance of the battery device 100 is affected due to the excessively high temperature of the battery monomer assembly 20 is solved. The protective plate 40 is located on the side of the first plate body 31 away from the second plate body 32, that is, the refrigerant heat exchange component 30 is located at the bottom of the refrigerant heat exchange component 30. The protective plate 40 resists at least part of the impact force to protect the refrigerant heat exchange component 30. In addition, the recess structure 41 on the protective plate 40 can accommodate the flow channel part 35 to protect the flow channel part 35. The recess structure 41 can also disperse the stress on the flow channel part 35, thereby reducing the risk of damage to the heat exchange flow channel 311. Therefore, the protective plate 40 reduces the impact of external force on the refrigerant heat exchange component 30 in the case of scraping the bottom and knocking, reduces the risk of damage and blockage of the heat exchange flow channel 34, and improves the reliability of the refrigerant heat exchange component 30 and the battery device 100.

[0102] Please refer to Figures 5 to 11 In some embodiments, the recess structure 41 comprises a plurality of recess parts 411, each of which is used to accommodate a part of the flow channel part 35. The part of the protective plate 40 between the adjacent recess parts 411 is in contact with the refrigerant heat exchange component 30.

[0103] The shape of the flow channel part 35 can be various. The flow channel part 35 can comprise a plurality of flow channels in series and / or in parallel. The recess structure 41 comprises a plurality of recess parts 411, each of which is arranged opposite to a part of the flow channel part 35 to accommodate the heat exchange flow channel 34 of the part. For example, the recess part 411 can be arranged opposite to one flow channel of the flow channel part 35, or the recess part 411 can be arranged opposite to two or more flow channels close to each other. The plurality of recess parts 411 can have different shapes to respectively adapt to the corresponding flow channel part 35. Two adjacent recess parts 411 can be completely spaced apart, or the two adjacent recess parts 411 can be connected at one end.

[0104] The part of the protective plate 40 between the adjacent recess parts 411 is in contact with the refrigerant heat exchange component 30, which can reduce the impact of external force on the refrigerant heat exchange component 30. The part of the protective plate 40 between the adjacent recess parts 411 can be partially or completely in contact with the refrigerant heat exchange component 30.

[0105] By adopting the technical scheme, the protection plate 40 can accommodate different parts of the flow channel part 35 through the plurality of recessed parts 411 respectively to protect the flow channel part 35, and the parts between the adjacent recessed parts 411 contact the refrigerant heat exchange component 30 to protect the refrigerant heat exchange component 30. When the bottom of the battery device 100 is impacted by external force, the protection plate 40 not only can resist the impact of the external force on the refrigerant heat exchange component 30, but also can reduce the stress concentration on the flow channel part 35, thereby reducing the risk of deformation of the refrigerant heat exchange component 30 and damage to the heat exchange flow channel 34.

[0106] In other embodiments, the recessed structure 41 can also be a groove structure that simultaneously accommodates a plurality of flow channels.

[0107] Please refer to Figures 5 to 11 In some embodiments, the part of the protection plate 40 between the adjacent recessed parts 411 is attached to the refrigerant heat exchange component 30 to support the refrigerant heat exchange component 30.

[0108] The part of the protection plate 40 between each two adjacent recessed parts 411 is protrudingly arranged relative to the recessed part 411, and the protection plate 40 of this part is attached to the surface of the refrigerant heat exchange component 30 to support the refrigerant heat exchange component 30.

[0109] By adopting the technical scheme, the part of the protection plate 40 between the adjacent recessed parts 411 has a good supporting effect on the refrigerant heat exchange component 30, and the protection effect is improved. Compared with the way that a gap is provided between the protection plate 40 and the refrigerant heat exchange component 30, the protection plate 40 is attached to the refrigerant heat exchange component 30, and the protection effect is better.

[0110] Please refer to Figures 8 to 11 In some embodiments, the surface of the at least one recessed part 411 towards the surface of the first plate body 31 is attached to and has the same shape as the surface of the corresponding flow channel part 35 away from the second plate body 32.

[0111] The surface of the flow channel part 35 away from the second plate body 32 is the lower surface of the flow channel part 35 arranged protrudingly, and the at least one recessed part 411 is arranged in a shape mimicking the flow channel part 35.

[0112] For example, one side of the refrigerant heat exchange component 30 is provided with a flow splitting region, and the plurality of recessed parts 411 are respectively arranged in a shape mimicking the flow channel part 35 in the flow splitting region, so that the recessed parts 411 can be attached to the lower surface of the flow channel part 35, and the parts between the recessed parts 411 can be supported on the part of the refrigerant heat exchange component 30 adjacent to the flow channel part 35.

[0113] As Figures 8 to 11As shown, in some embodiments, the bottom surface of the recess 411 has the same shape as the bottom surface of the portion of the flow channel portion 35 accommodated thereby, so that the recess 411 also has a flow channel shape; the portion of the flow channel portion 35 accommodated by the recess 411 can be strip-shaped, broken line-shaped, curve-shaped, etc., and correspondingly, the recess 411 can also be strip-shaped, broken line-shaped, curve-shaped, etc. The recess 411 and the portion of the heat exchange flow channel 34 accommodated thereby are arranged in abutment with each other, as shown in Figure 11 As shown, the bottom surface of the flow channel portion 35 abuts the surface of the recess 411, so that the flow channel portion 35 and the recess 411 are in abutment and contact, which is conducive to improving the connection stability between the protective plate 40 and the heat exchange component 30.

[0114] In some embodiments, the plurality of recesses 411 are all arranged in a shape matching manner with the portion of the flow channel portion 35 accommodated thereby. The flow channel portion 35 can be made by stamping, and the recess 411 can also be made by stamping, machining, or injection molding.

[0115] By adopting the above technical solution, the recess 411 can protect the portion of the heat exchange flow channel 34 accommodated thereby, and the shapes of the two are the same, so that the recess 411 is more likely to disperse the stress on the heat exchange flow channel 34, and the protection effect on the heat exchange flow channel 34 is better.

[0116] In other embodiments, the recess 411 and the portion of the flow channel portion 35 accommodated thereby are shape-fitted, as shown in Figure 5 and Figure 6 As shown, the recess 411 extends along the flow channel portion 35, and the width of the recess 411 is adapted to the portion of the flow channel portion 35 accommodated thereby, so that the recess 411 and the flow channel portion 35 can also be arranged in abutment.

[0117] Please refer to Figures 4 to 8 In some embodiments, the flow channel portion 35 includes a plurality of parallelly arranged sub-flow channel portions 351, the sub-flow channel portion 351 includes a branch flow channel portion 3511 and a plurality of sub-flow channel portions 3512 connected to the branch flow channel portion 3511, the plurality of sub-flow channel portions 3512 are sequentially connected, the sub-flow channel portion 3512 extends along a first direction X and the plurality of sub-flow channel portions 3512 are arranged along a second direction Y, the second direction Y intersects the first direction X, at least part of the branch flow channel portion 3511 is located in the recess 411, and at least one recess 411 is in abutment with the branch flow channel portion 3511.

[0118] The flow channel portion 35 is used to form the heat exchange flow channel 34, and it can be understood that the sub-flow channel portion 351 is used to form a sub-flow channel, the branch flow channel portion 3511 is used to form a branch flow channel, and the sub-flow channel portion 3512 is used to form a sub-flow channel.

[0119] The plurality of branch flow channel portions 351 are arranged in parallel, so that the plurality of branch flow channel portions 351 can independently supply refrigerant circulation flow. The refrigerant heat exchange component 30 has a flow channel inlet and a flow channel outlet, and each branch flow channel portion 351 is in communication with the flow channel inlet and the flow channel outlet. In some embodiments, the refrigerant heat exchange component 30 further comprises a heat exchange joint 33 in communication with the flow channel inlet and the flow channel outlet, and the heat exchange joint 33 is used to connect the refrigerant heat exchange component 30 to other heat exchange devices to allow refrigerant to flow in and out.

[0120] Each branch flow channel portion 351 comprises a branch flow channel portion 3511 and a plurality of sub-flow channel portions 3512 connected to the branch flow channel portion 3511, and the branch flow channel portions 3511 of the plurality of branch flow channel portions 351 are arranged at intervals; the sub-flow channel portions 3512 are used for heat exchange with the battery cell assembly 20, and each sub-flow channel portion 3512 can comprise one flow channel portion or a plurality of parallel arranged flow channel portions. Each branch flow channel portion 351 comprises a branch flow channel portion 3511 and a plurality of sub-flow channel portions 3512, and the plurality of sub-flow channel portions 3512 are sequentially connected to form a flow path.

[0121] By arranging the sub-flow channel portions 3512 to extend in the first direction X and the plurality of sub-flow channel portions 3512 to be arranged in the second direction Y, the plurality of sub-flow channel portions 3512 can be arranged side by side to exchange heat with the battery cell assembly 20, improving the uniformity of heat exchange and the efficiency of thermal management. Optionally, the plurality of battery cells 21 in the battery cell assembly 20 are arranged in the first direction X, and the plurality of battery cell assemblies 20 are arranged in the second direction Y, and the arrangement of the sub-flow channel portions 3512 is adapted to the arrangement of the battery cells 21, and the uniformity of thermal management is better.

[0122] If the branch flow channel portion 3511 is blocked after being impacted, the branch flow channel portion 3511 will not be able to supply refrigerant flow; the plurality of sub-flow channel portions 3512 are arranged, and the risk of deformation of the sub-flow channel portions 3512 is smaller than that of the branch flow channel portion 3511, and the sub-flow channel portion 3512 can comprise a plurality of parallel flow channel portions 3512, and the risk of blockage of the sub-flow channel portion 3512 is smaller. The embodiments of the present application accommodate at least part of the branch flow channel portion 3511 in the recessed structure 41, which can disperse the stress on the branch flow channel portion 3511 and reduce the risk of damage to the branch flow channel portion 3511.

[0123] By using the above technical solution, the flow channel portion 35 comprises a plurality of parallel arranged branch flow channel portions 351, each branch flow channel portion 351 can independently supply refrigerant circulation flow, and it is not easy to affect the heat exchange effect of the entire refrigerant heat exchange component 30 due to blockage of a certain place of the heat exchange flow channel 34, thereby improving the reliability of the refrigerant heat exchange component 30; and the recessed portion 411 accommodates at least part of the branch flow channel portion 3511, which can reduce the risk of damage to the branch flow channel portion 3511.

[0124] Please refer to Figures 5 to 7 In some embodiments, the branch channel portion 3511 includes an inflow branch channel portion 3511a and a backflow branch channel portion 3511b, the inflow branch channel portion 3511a, the plurality of sub-channel portions 3512, and the backflow branch channel portion 3511b are sequentially communicated; the plurality of recessed portions 411 includes a first recessed portion 411a, at least part of the inflow branch channel portion 3511a is located in the first recessed portion 411a and is fitted with the first recessed portion 411a; and / or, the plurality of recessed portions 411 includes a second recessed portion 411b, at least part of the backflow branch channel portion 3511b is located in the second recessed portion 411b and is fitted with the second recessed portion 411b.

[0125] The inflow branch channel portion 3511a is used for inflow, and the backflow branch channel portion 3511b is used for backflow, wherein one inflow branch channel portion 3511a can correspond to one sub-channel portion 3511, or a plurality of sub-channel portions 3511 can share one inflow branch channel portion 3511a; similarly, one backflow branch channel portion 3511a can correspond to one sub-channel portion 3511, or a plurality of sub-channel portions 3511 can share one backflow branch channel portion 3511b.

[0126] The first recessed portion 411a can accommodate one inflow branch channel portion 3511a, or the first recessed portion 411a can also simultaneously accommodate at least two adjacent inflow branch channel portions 3511a; optionally, the first recessed portion 411a can be contoured with the corresponding inflow branch channel portion 3511a.

[0127] The second recessed portion 411b can accommodate one backflow branch channel portion 3511b, or the second recessed portion 411b can also simultaneously accommodate at least two adjacent backflow branch channel portions 3511b; optionally, the second recessed portion 411b can be contoured with the corresponding backflow branch channel portion 3511b.

[0128] Optionally, the first recessed portion 411a or the second recessed portion 411b can also accommodate adjacent inflow branch channel portions 3511a and backflow branch channel portions 3511b.

[0129] The positions of the inflow branch channel portion 3511a and the backflow branch channel portion 3511b in the sub-channel portion 351 are critical, and if clogging occurs, it will affect the sub-channel portion 351 where they are located. The embodiments of the present application accommodate the inflow branch channel portion 3511a and / or the backflow branch channel portion 3511b in the recessed structure 41, which can reduce stress concentration on the inflow branch channel portion 3511a and / or the backflow branch channel portion 3511b, and reduce the risk of damage to the inflow branch channel portion 3511a and / or the backflow branch channel portion 3511b.

[0130] Please refer to Figure 5 ,Figure 6 and Figure 7 In some embodiments, the flow channel portion 35 further comprises a main inlet flow channel portion 352 and a main outlet flow channel portion 353, the main inlet flow channel portion 352 is in communication with the plurality of inlet branch flow channel portions 3511a, and the main outlet flow channel portion 353 is in communication with the plurality of return branch flow channel portions 3511b; the plurality of recessed portions 411 comprises a third recessed portion 411c, at least part of the main inlet flow channel portion is located in and fitted with the third recessed portion 411c; and / or, the plurality of recessed portions comprises a fourth recessed portion 411d, at least part of the return branch flow channel portion is located in and fitted with the fourth recessed portion 411d.

[0131] The main inlet flow channel portion 352 is used to connect the flow channel inlet and the inlet branch flow channel portion 3511a, and the main outlet flow channel portion 353 is used to connect the flow channel outlet and the return branch flow channel portion 3511b.

[0132] Optionally, the recessed structure 41 comprises a plurality of recessed portions 411, and the main inlet flow channel 342, the main outlet flow channel 343, the inlet branch flow channel portion 3511a, and the return branch flow channel portion 3511b are respectively accommodated in the plurality of recessed portions 411. Since the positions of the main inlet flow channel 342 and the main outlet flow channel 343 in the heat exchange flow channel 34 are critical, if blockage occurs, it will affect the entire heat exchange flow channel 34. The embodiment of the present application accommodates the main inlet flow channel 342 and / or the main outlet flow channel 343 in the recessed structure 41, which can reduce the stress on the main inlet flow channel 342 and / or the main outlet flow channel 343 and reduce the risk of damage to the main inlet flow channel 342 and / or the main outlet flow channel 343.

[0133] By adopting the above technical solution, the protection plate 40 can provide enhanced protection for the main inlet flow channel portion 352 and the main outlet flow channel portion 353, thereby improving the reliability of the refrigerant heat exchange component 30.

[0134] Please refer to Figure 4 and Figure 5 In some embodiments, the refrigerant heat exchange component 30 has a functional area 301, a distribution area 302, and a peripheral area 303, the functional area 301 and the distribution area 302 are arranged side by side, and the functional area 301 and the distribution area 302 are located in the peripheral area 303; the plurality of sub-flow channel portions 3512 are arranged in the functional area 301, the plurality of branch flow channel portions 3511 are arranged in the distribution area 302, and the protection plate 40 is at least arranged in contact with the distribution area 302.

[0135] The plurality of sub-flow channel portions 3512 are arranged in the functional area 301, the plurality of branch flow channel portions 3511 are arranged in the distribution area 302, and the peripheral area 303 is arranged along the outer periphery of the refrigerant heat exchange component 30; the protection plate 40 is at least arranged in contact with the distribution area 302.

[0136] In some embodiments, the structure of the protective plate 40 can be set according to factors such as the importance of each part of the heat exchange channel 34 and the probability of scratches on each part of the refrigerant heat exchange component 30.

[0137] The refrigerant heat exchange component 30 has a functional area 301, a flow distribution area 302, and a peripheral area 303. The functional area 301 is used for heat exchange with the battery cell assembly 20. It can be understood that the functional area 301 is arranged opposite to the battery cell assembly 20, and the functional area 301 can directly or indirectly contact the battery cell assembly 20 for heat exchange. The flow distribution area 302 is located on one side of the refrigerant heat exchange component 30, which facilitates the utilization of the space of the refrigerant heat exchange component 30 and the connection between the refrigerant heat exchange component 30 and the external structure of the battery device 100. The peripheral area 303 surrounds the functional area 301 and the flow distribution area 302.

[0138] The protective plate 40 is positioned at least opposite to the diversion area 302, so that the protective plate 40 can protect the diversion area 302.

[0139] For example, such as Figures 4 to 6 As shown, the protective plate 40 is fitted to the diversion area 302 and the peripheral area 303, so that the protective plate 40 can protect the diversion area 302 through the recessed structure 41.

[0140] For example, such as Figure 4 and Figure 8 As shown, the area of ​​the protective plate 40 is smaller than that of the refrigerant heat exchange component 30. The protective plate 40 is only attached to the diversion area 302 and a portion of the outer periphery 303 outside the diversion area 302. The protective plate 40 can also protect the diversion area 302.

[0141] On the one hand, the branch channels 3511 in the diversion area 302 are arranged in parallel to divert or merge the refrigerant. The diversion area 302 is of high importance and has a significant impact on the heat exchange channel 34. On the other hand, after the battery device 100 is installed in the vehicle, the diversion area 302 is usually located on the side of the battery device 100 closer to the front of the vehicle, and the diversion area 302 is more likely to be scratched. Therefore, in this embodiment, the protective plate 40 is configured to be at least in contact with the diversion area 302. The protective plate 40 can at least protect the diversion area 302, reducing the risk of heat exchange failure of the refrigerant heat exchange component 30 and achieving a better protective effect.

[0142] It is understood that in other embodiments, the protective plate 40 may also protect other areas of the refrigerant heat exchange component 30 and provide a recessed structure 41 for accommodating a portion of the flow channel 35.

[0143] like Figure 5As shown, in some embodiments, the protective plate 40 has a groove 42 on the side facing the refrigerant heat exchange component 30, and the orthographic projection of the functional area 301 toward the protective plate 40 at least partially falls within the groove 42.

[0144] The groove 42 is located on the side of the protective plate 40 facing the refrigerant heat exchange component 30, and the groove 42 is disposed opposite to at least a portion of the functional area 301, that is, the groove 42 is disposed opposite to at least a portion of the sub-flow channel portion 3512. The groove 42 can accommodate at least a portion of the sub-flow channel portion 3512, and the bottom of the groove 42 can resist impact, reducing the impact force of external forces on the functional area 301. Optionally, multiple sub-flow channel portions 3512 can be accommodated within the groove 42.

[0145] The protective plate 40 provided in this embodiment of the application is provided with a recessed structure 41 and a groove 42. The recessed structure 41 can be configured to conform to the flow distribution area 302 to protect the flow distribution area 302. The groove 42 can accommodate at least part of the sub-flow channel portion 3512 to protect the functional area 301. Thus, the protective plate 40 can more comprehensively protect the refrigerant heat exchange component 30.

[0146] like Figure 6 As shown, in some other embodiments, the protective plate 40 is provided with a cutout portion 43, and the orthographic projection of the functional area 301 toward the protective plate 40 falls at least partially within the cutout portion 43.

[0147] Optionally, multiple sub-channel sections 3512 can be accommodated within the hollow section 43.

[0148] By adopting the above technical solution, the protective plate 40 is arranged opposite to the current distribution area 302 to protect the current distribution area 302. The protective plate 40 is hollowed out in the functional area 301, which reduces the material cost of the protective plate 40 and reduces the weight of the battery device 100.

[0149] like Figures 8 to 11 As shown, in another embodiment, the protective plate 40 includes one or more sub-protective plates 401, which are connected to the first plate 31 and cover a portion of the first plate 31.

[0150] The number of sub-protective plates 401 is one or more. The area of ​​each sub-protective plate 401 is smaller than the area of ​​the refrigerant heat exchange component 30. Each sub-protective plate 401 covers only a portion of the refrigerant heat exchange component 30 for protection. Each sub-protective plate 401 is connected to the refrigerant heat exchange component 30. For example, the protective plate 40 includes only one sub-protective plate 401, which covers the flow distribution area 302. Further, the sub-protective plate 401 may also cover the flow channel inlet and outlet, as well as the portions of multiple sub-flow channel sections 3512 near the flow distribution area 302.

[0151] By setting the protective plate 40 as one or more sub-protective plates 401, the structure of the protective plate 40 can be flexibly set to provide protection for the corresponding area on the corresponding refrigerant heat exchange component 30.

[0152] Please continue to refer to Figures 8 to 11 In some embodiments, the sub-protective plate 401 has the same shape as the part of the first plate body 31 it covers.

[0153] The sub-protective plate 401 is shaped to cover the part of the first plate body 31, and they have the same shape. The recess structure 41 of the sub-protective plate 401 has the same shape as the heat exchange flow channel 34 it covers. Optionally, the sub-protective plate 401 can be made by injection molding, which is convenient for molding; or the sub-protective plate 401 can also be made by punching, machining, etc. to make the recess structure 41.

[0154] By shaping the sub-protective plate 401 to cover the part of the first plate body 31, the recess structure 41 on the sub-protective plate 401 can better disperse the stress on the flow channel part 35, and the protection effect is better.

[0155] The recess structure 41 can be made by punching, machining, etc. so that the side of the recess structure 41 away from the refrigerant heat exchange component 30 protrudes outward. Please refer to Figures 8 to 11 In some embodiments, the side of the protective plate 40 away from the refrigerant heat exchange component 30 is a flat surface. For example, the protective plate 40 can be made by injection molding. The protective plate 40 is only provided with the recess structure 41 on the side close to the refrigerant heat exchange component 30, and the side of the protective plate 40 away from the refrigerant heat exchange component 30 is a flat surface, which can be conveniently connected to the bottom protective plate 50 or other components.

[0156] In some embodiments, the protective plate 40 is one of a metal piece, a plastic piece, and a carbon fiber piece.

[0157] The protective plate 40 can be a metal piece, such as an aluminum piece, an iron piece, a stainless steel piece, etc. The protective plate 40 can also be a plastic piece, such as a high-strength plastic material. The protective plate 40 can also be a carbon fiber piece, such as a high-strength carbon fiber material.

[0158] The protective plate 40 provided in the embodiments of the present application can be made of a variety of high-strength materials, which is easy to manufacture.

[0159] In some embodiments, the protective plate 40 and the refrigerant heat exchange component 30 are connected by welding, fasteners, or one-piece injection molding. The protective plate 40 provided in the embodiments of the present application can be fixedly connected to the refrigerant heat exchange component 30 in a variety of connection modes, so that the protective plate 40 can be stably attached to the bottom of the refrigerant heat exchange component 30, and the connection between the protective plate 40 and the refrigerant heat exchange component 30 has good reliability.

[0160] Please refer to Figure 2 , Figure 5 In some embodiments, the battery device 100 further comprises a bottom guard plate 50, which is arranged on the side of the protective plate 40 away from the refrigerant heat exchange component 30.

[0161] The bottom guard plate 50 can be a rectangular or other shaped plate body, and the area of the bottom plate can be greater than or equal to the area of the protective plate 40. The bottom guard plate 50 is located at the bottom of the refrigerant heat exchange component 30 and the protective plate 40, which can further reduce the risk of deformation of the refrigerant heat exchange component 30 due to external force impact.

[0162] In some embodiments, the box body 10 comprises a box body 12 and an upper cover 11, the two ends of the box body 12 are respectively provided with openings, and the upper cover 11 and the refrigerant heat exchange component 30 cover the openings at the two ends of the box body 12 respectively. The refrigerant heat exchange component 30 is bonded to the battery monomer assembly 20 by thermal conductive glue.

[0163] The refrigerant heat exchange component 30 is arranged at the bottom of the box body 10 and the plurality of battery monomer assemblies 20, and the refrigerant heat exchange component 30 can be used as the bottom plate of the box body, which simplifies the structure of the battery device 100 and helps to save vehicle space.

[0164] The refrigerant heat exchange component 30 is bonded to the battery monomer assembly 20 by thermal conductive glue, and the refrigerant heat exchange component 30 can directly exchange heat with the battery monomer assembly 20, which has high heat exchange efficiency and high heat exchange effect, effectively improving the reliability of the battery device 100.

[0165] In some embodiments, the heat exchange flow channel 34 is used for refrigerant circulation.

[0166] The refrigerant, also known as refrigerant, is a working fluid used to transfer heat energy in temperature regulation systems and other systems to produce freezing effect. During the flow of refrigerant, the refrigerant is in gas-liquid two-phase state. It helps heat transfer from one place to another through the process of evaporation and condensation, thereby achieving the effect of cooling or heating. The main function of refrigerant is to play a role in electrical equipment such as air conditioners, refrigerators, battery devices 100, etc. by changing its physical state (from liquid to gas or from gas to liquid) to absorb or release heat, thereby achieving the purpose of temperature regulation. There are many types of refrigerants, such as R134A (tetrafluoroethane), R1234YF (tetrafluoropropene), R1233ZD (monochlorotrifluoropropene), etc.

[0167] The refrigerant heat exchange component 30 uses refrigerant heat exchange, and the refrigerant heat exchange component 30 is a direct cooling plate. In the working process, the refrigerant evaporates and absorbs heat in the direct cooling plate, thereby reducing the temperature of the battery device. At the same time, the refrigerant is converted into a gaseous state during the evaporation process and is transported to the condenser through the pipeline for condensation and liquefaction in order to be recycled again.

[0168] The direct cooling plate has the advantages of high heat exchange efficiency. The width of the heat exchange flow channel in the direct cooling plate is relatively narrow. Generally, the width of the heat exchange flow channel in the direct cooling plate is smaller than that of the flow channel in the water cooling plate. Therefore, the risk of blockage of the direct cooling plate after being bumped is relatively large. The battery device 100 provided in the embodiments of the present application includes a protective plate 40, which can reduce the risk of damage and blockage of the heat exchange flow channel 34 in the direct cooling plate, and improve the reliability of the direct cooling plate.

[0169] Please refer to Figures 2 to 11 Some embodiments of the present application provide a battery device 100, which includes a box body 10, a battery monomer assembly 20, a refrigerant heat exchange component 30, and a protective plate 40. The battery monomer assembly 20 is arranged in the box body 10. The refrigerant heat exchange component 30 is connected to the box body 10. The refrigerant heat exchange component 30 includes a first plate body 31 and a second plate body 32 which are stacked and connected. The first plate body 31 has a flow channel part 35 protruding away from the second plate body. The flow channel part 35 and the second plate body 32 enclose a heat exchange flow channel 34. The protective plate 40 is located on the side of the first plate body 31 away from the second plate body 32. One side of the protective plate 40 facing the refrigerant heat exchange component 30 is provided with a recess structure 41. At least part of the flow channel part 35 is located in the recess structure 41 and is attached to the recess structure 41. In some embodiments, the recess structure 41 includes a plurality of recess parts 411. Each recess part 411 is used to accommodate a part of the flow channel part 35. The part between every two adjacent recess parts 411 is used to support the refrigerant heat exchange component 30. At least one recess part 411 is attached to the surface of the corresponding flow channel part 35 away from the second plate body 32 and has the same shape as the surface of the first plate body 31.

[0170] The embodiments of the second aspect of the present application provide a heat exchange device, which includes a refrigerant heat exchange component 30 and a protective plate 40. The refrigerant heat exchange component 30 includes a first plate body 31 and a second plate body 32 which are stacked and connected. The first plate body 31 has a flow channel part 35 protruding away from the second plate body. The flow channel part 35 and the second plate body 32 enclose a heat exchange flow channel 34. The protective plate 40 is located on the side of the first plate body 31 away from the second plate body 32. One side of the protective plate 40 facing the refrigerant heat exchange component 30 is provided with a recess structure 41. At least part of the flow channel part 35 is located in the recess structure 41 and is attached to the recess structure 41.

[0171] The heat exchange device provided in this application embodiment includes a refrigerant heat exchange component 30 and a protective plate 40. The protective plate 40 can resist at least part of the impact force to protect the refrigerant heat exchange component 30. Furthermore, the recessed structure 41 on the protective plate 40 can accommodate the flow channel portion 35 to protect the flow channel portion 35. The recessed structure 41 can also disperse the stress on the flow channel portion 35, thereby reducing the risk of damage to the heat exchange flow channel 311. Therefore, the protective plate 40 reduces the impact of external forces on the refrigerant heat exchange component 30 in the event of scraping, bumping, etc., reduces the risk of damage and blockage of the heat exchange flow channel 34, and improves the reliability of the refrigerant heat exchange component 30 and the battery device 100.

[0172] An embodiment of the second aspect of this application provides an electrical device including a battery device 100 as provided in the first aspect, the battery device 100 being used to provide electrical energy.

[0173] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0174] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: Box; The battery cell assembly is located inside the housing; A refrigerant heat exchange component is connected to the housing. The refrigerant heat exchange component includes a first plate and a second plate that are stacked and connected to each other. The first plate has a flow channel portion that protrudes away from the second plate. The flow channel portion and the second plate form a heat exchange flow channel. A protective plate is located on the side of the first plate body facing away from the second plate body. The protective plate has a recessed structure on the side facing the refrigerant heat exchange component. At least a portion of the flow channel portion is located within the recessed structure and fits against the recessed structure.

2. The battery device as claimed in claim 1, characterized in that, The recessed structure includes multiple recesses, each of which is used to accommodate a portion of the flow channel, and the portion of the protective plate located between adjacent recesses is in contact with the refrigerant heat exchange component.

3. The battery device as claimed in claim 2, characterized in that, The portion of the protective plate located between adjacent recesses fits into the refrigerant heat exchange component to support it.

4. The battery device as claimed in claim 2, characterized in that, At least one of the recessed portions has a surface facing the first plate that is in contact with and has the same shape as the corresponding flow channel portion facing away from the second plate.

5. The battery device as claimed in claim 2, characterized in that, The flow channel section includes multiple parallel branch flow channel sections. Each branch flow channel section includes a branch flow channel section and multiple sub-flow channel sections connected to the branch flow channel section. The multiple sub-flow channel sections are connected in sequence. The sub-flow channel sections extend along a first direction and the multiple sub-flow channel sections are arranged along a second direction. The second direction intersects with the first direction. At least a portion of the branch channel is located within the plurality of recesses, and at least one of the recesses is in contact with the branch channel.

6. The battery device as claimed in claim 5, characterized in that, The branch channel section includes an inlet branch channel section and a return branch channel section, wherein the inlet branch channel section, the plurality of sub-channel sections and the return branch channel section are connected in sequence; The plurality of recesses include a first recess, at least a portion of the inlet branch channel is located in the first recess and is in contact with the first recess; And / or, the plurality of said recesses include a second recess, at least a portion of the return branch channel is located in the second recess and is in contact with the second recess.

7. The battery device as claimed in claim 6, characterized in that, The flow channel section further includes a main inlet flow channel section and a main outlet flow channel section. The main inlet flow channel section is connected to multiple inlet branch flow channels, and the main outlet flow channel section is connected to multiple return branch flow channels. The plurality of recesses include a third recess, at least a portion of the main inlet channel is located in the third recess and is in contact with the third recess; And / or, the plurality of said recesses include a fourth recess, at least a portion of the return branch channel is located in the fourth recess and is in contact with the fourth recess.

8. The battery device as claimed in claim 5, characterized in that, The refrigerant heat exchange component has a functional area, a flow distribution area, and a peripheral area. The functional area and the flow distribution area are arranged side by side, and the functional area and the flow distribution area are located within the peripheral area. Multiple sub-channels are located in the functional area, multiple branch channels are located in the diversion area, and the protective plate is at least in contact with the diversion area.

9. The battery device as claimed in claim 8, characterized in that, The protective plate has a groove on the side facing the refrigerant heat exchange component, and the orthographic projection of the functional area toward the protective plate at least partially falls within the groove.

10. The battery device as claimed in claim 8, characterized in that, The protective plate has a hollowed-out section, and the orthographic projection of the functional area toward the protective plate falls at least partially within the hollowed-out section.

11. The battery device as claimed in claim 1, characterized in that, The protective panel includes one or more sub-protective panels, which are connected to the first panel and cover a portion of the first panel.

12. The battery device as claimed in claim 11, characterized in that, The sub-protective plate has the same shape as the portion of the first plate it covers.

13. The battery device according to any one of claims 1-12, characterized in that, The protective plate is made of one of the following materials: metal, plastic, or carbon fiber.

14. The battery device according to any one of claims 1-12, characterized in that, The protective plate is connected to the refrigerant heat exchange component by welding, fasteners, or integral injection molding.

15. The battery device according to any one of claims 1-12, characterized in that, The battery device also includes a bottom protective plate, which is located on the side of the protective plate away from the refrigerant heat exchange component.

16. The battery device according to any one of claims 1-12, characterized in that, The enclosure includes a main body and a top cover. The main body has openings at both ends. The top cover and the refrigerant heat exchange component cover the openings at both ends of the main body. The refrigerant heat exchange component is bonded to the battery cell assembly with thermally conductive adhesive.

17. The battery device according to any one of claims 1-16, characterized in that, The heat exchange channel is used for the circulation of refrigerant.

18. A heat exchange device, characterized in that, include: A refrigerant heat exchange component includes a first plate and a second plate that are stacked and connected to each other. The first plate has a flow channel portion that protrudes away from the second plate, and the flow channel portion and the second plate form a heat exchange flow channel. A protective plate is located on the side of the first plate body facing away from the second plate body. The protective plate has a recessed structure on the side facing the refrigerant heat exchange component. At least a portion of the flow channel portion is located within the recessed structure and fits against the recessed structure.

19. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-17 or a heat exchange device as described in claim 18, wherein the battery device is used to provide electrical energy.

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