Battery cooling device

Abstract

The utility model relates to a battery cooling device which is used for cooling a battery and comprises a cold plate and a plurality of side plates, the side plates are arranged outside the side walls of the battery, the side plates and the battery are arranged on the cold plate, cover-shaped structures are formed on the side plates, the edges of the cover-shaped structures abut against the side walls of the battery, phase-change materials are arranged in the cover-shaped structures and make contact with the side walls, and the phase-change materials are arranged on the side walls of the battery. A plurality of protrusions are arranged in the cover-shaped structure and extend from the bottom of the cover-shaped structure to the side wall, and heat transfer is formed between the side plate and the phase change material and between the cold plate and the side plate. The phase-change material is used for heat dissipation, and the cold plate conducts heat and cools the phase-change material, so that the phase-change material can be reused, and the use cost is reduced. And meanwhile, the cold plate also has a certain cooling effect on the battery assembly, so that multidirectional cooling is realized, and the phenomenon of overlarge temperature difference of each area of the battery is reduced. And the bulges enable the phase change material to form a porous structure, so that the heat dissipation and heat exchange effects of the phase change material are improved, and the cooling efficiency of the battery is further improved.

Description

Technical Field

[0001] This application relates to the technical field of battery cooling, and particularly to a battery cooling device. Background Art

[0002] With the rapid development of the new energy vehicle market, as a core component, the performance and safety of lithium-ion batteries have attracted increasing attention. Battery thermal management is one of the key technologies to ensure battery performance and safety, and has become a hot topic in the field of new energy research and development.

[0003] Low temperature will reduce the power and energy output of lithium-ion batteries, and high temperature will cause complex side reactions in battery components, and even trigger thermal runaway under extreme conditions. For a battery system, uneven temperature distribution will lead to different electrochemical behaviors and electrical imbalance of battery cells, seriously affecting the performance of lithium-ion batteries. Therefore, it is of great significance to create a reliable and efficient battery thermal management system to maintain the battery temperature within the range specified for new energy vehicles.

[0004] Currently, there are mainly three battery thermal management technologies:

[0005] Air cooling: Heat generated by the battery is removed by air flow to achieve cooling. Its advantages are simple structure, low cost, environmental protection and no pollution, but it is difficult to meet the high-efficiency cooling requirements of power batteries and may affect battery life.

[0006] Liquid cooling: A coolant is used for heat exchange with the battery, which can dissipate heat efficiently and quickly. However, since the cold plate carrying the liquid is in local contact with the battery, the temperature difference between the area of the battery far from the cold plate and the area close to the cold plate is relatively large during the cooling process, which has a certain impact on battery life. And the liquid cooling system requires the use of a coolant, and the coolant may leak. Once leaked, it will not only affect the cooling effect but also pose a safety hazard.

[0007] Phase change cooling: Utilize the heat storage and release characteristics of phase change media to maintain the battery at the optimal temperature. This technology is mainly divided into two methods: direct cooling and phase change material cooling.

[0008] Specifically, in direct cooling, the refrigerant is compressed into a high-temperature and high-pressure gas by the compressor of the thermal management system, condensed into a normal-temperature and high-pressure liquid by the condenser, and then enters the expansion valve to expand into a low-temperature and low-pressure two-phase flow and enter the battery direct cooling plate. The two-phase flow absorbs the heat of the battery and completely turns into gas, and returns to the compressor through the expansion valve to complete a complete cycle. The cooling efficiency of direct cooling technology is more superior than that of liquid cooling, but since the cold plate still carries the refrigerant, the temperature difference between the area of the battery far from the cold plate and the area close to the cold plate is still relatively large, which still has a certain impact on battery life.

[0009] Phase change material cooling utilizes the property that the phase change material coated on the battery surface or filled in the battery gap absorbs a large amount of heat during the phase change process for heat dissipation. Although phase change material heat dissipation has advantages such as high heat dissipation efficiency and precise temperature control, the thermal conductivity of the phase change material is relatively low, and the absorbed heat cannot be discharged independently, requiring regular replacement of the phase change material, resulting in relatively high costs.

[0010] Therefore, there is an urgent need for a battery cooling device that can meet the battery temperature management requirements, take into account safety, protect the battery service life, and have a relatively low cost. Summary of the Invention

[0011] Aiming at the deficiencies of the existing technology, the purpose of this application is to provide a battery cooling device that can meet the battery temperature management requirements, take into account safety, and protect the battery service life.

[0012] The above object of this application is achieved through the following technical solutions:

[0013] A battery cooling device for cooling a battery, comprising a cold plate and a plurality of side plates. The side plates are arranged outside the side walls of the battery, and both the side plates and the battery are placed on the cold plate. Among them, a lid-like structure is formed on the side plates, the edge of the lid-like structure abuts against the side wall of the battery, a phase change material is provided inside the lid-like structure, the phase change material is in contact with the side wall, a plurality of protrusions are provided inside the lid-like structure, and the protrusions extend from the bottom of the lid-like structure towards the side wall. Heat transfer is formed between the side plates and the phase change material, and between the cold plate and the side plates.

[0014] Adopting the above technical solution, the cooling efficiency is improved. The phase change material is in direct contact with the battery side wall, the heat transfer path is shorter, and the heat transfer efficiency is higher. The protrusion feature on the side plate makes the phase change material form a porous structure in the solid state, increasing the surface area of the phase change material, improving the heat dissipation and heat exchange effect of the phase change material, and further improving the cooling efficiency of the battery.

[0015] Adopting the above technical solution, the phase change material exchanges heat through the side plates and the cold plate, avoiding direct contact between the phase change material and the cold plate, effectively preventing the phase change material from corroding the cold plate, extending the service life of the cold plate, avoiding direct contact between the phase change material and the cold plate, preventing the phase change material from corroding the cold plate, extending the service life of the cold plate, and improving system reliability.

[0016] Adopting the above technical solution, the phase change material does not directly contact the cold plate, avoiding the phase change material from caking or adhering to the cold plate surface, preventing the reduction of heat transfer efficiency, ensuring that the heat transfer efficiency is not affected, and guaranteeing the refrigeration effect.

[0017] The present application is further configured such that an outer edge is connected to the side plate, the outer edge forms a circle on the side plate, the outer edge extends from the side plate towards the side wall, the outer edge abuts against the side wall, and the outer edge is connected to the side plate to form the lid-like structure.

[0018] The present application is further configured such that a sealing structure is provided at one end of the outer edge that abuts against the side wall.

[0019] With the above technical solution, the outer edge abuts against the side wall of the battery and a sealing structure is provided, effectively sealing the side plate and the side wall of the battery to form a closed space, fixing the phase change material therein, preventing the leakage of the phase change material, and the outer edge abuts against the side wall of the battery to form a stable structure, which can effectively improve the service life of the battery cooling device and ensure its long-term reliable operation.

[0020] The present application is further configured such that one end of the protrusion is connected to the bottom of the lid-like structure, and the other end of the protrusion abuts against the side wall.

[0021] The present application is further configured such that the protrusion is hemispherical, and a plurality of the protrusions are arranged in a rectangular array within the lid-like structure.

[0022] With the above technical solution, a plurality of hemispherical protrusions increase the heat transfer between the phase change material and the side wall of the battery, improving the heat transfer efficiency. The hemispherical protrusions can effectively guide the flow of the phase change material around the protrusions, promoting the heat exchange between the phase change material and the side wall of the battery and improving the heat exchange efficiency.

[0023] The present application is further configured such that the lower end of the side plate is bent to form a heat-conducting edge, and the heat-conducting edge abuts against the cold plate.

[0024] With the above technical solution, the contact area between the side plate and the cold plate is enlarged, effectively improving the heat transfer efficiency.

[0025] The present application is further configured such that the battery cooling device further includes a plurality of end plates, the end plates are placed on the cold plate, two end plates are provided outside both ends of one battery, two side plates are provided outside both sides of one battery, and two end plates and two side plates surround the outside of one battery.

[0026] The present application is further configured such that the ends of two oppositely arranged side plates are bent towards each other to form fastening portions, and both ends of each end plate are respectively matched with the fastening portions on two oppositely arranged side plates.

[0027] With the above technical solution, the structural stability of the battery is enhanced. The end plates are connected to the side plates, effectively fixing the side plates, preventing the side plates from deforming or falling off during use, and improving the overall structural stability of the battery.

[0028] This application is further configured such that the number of batteries provided on each cold plate is one or more.

[0029] By adopting the above technical solution, the space utilization rate can be improved for centralized heat dissipation. A single cold plate can cool multiple batteries, reducing the number of cold plates, thereby reducing the volume of the batteries and improving the space utilization rate.

[0030] This application is further configured such that the protrusion is formed by stamping and a stamping pit is formed on the side of the side plate opposite to the battery.

[0031] By adopting the above technical solution, the protrusion is formed by stamping, simplifying the production process, reducing the production cost, and improving the structural strength. The stamping pit structure can improve the structural strength of the side plate, enhance the overall strength of the battery, and improve its reliability.

[0032] By adopting the above technical solution, the heat dissipation uniformity is improved. The stamping pit structure can effectively improve the heat dissipation uniformity of the battery side wall, avoid local overheating, reduce the risk of battery failure or accident, and improve the safety of the battery.

[0033] In summary, the beneficial technical effects of this application are as follows:

[0034] 1. Using the phase change material for heat dissipation, while having high heat dissipation efficiency and precise temperature control, using the cold plate to conduct heat and cool the phase change material enables the phase change material to be reused, reducing the usage cost.

[0035] 2. Placing the phase change material on both sides and setting the cold plate below can both play a certain role in cooling the battery assembly, achieving multi-directional cooling, reducing the phenomenon of excessive temperature difference in each area of the battery, and prolonging the service life of the battery.

[0036] 3. The phase change material is in direct contact with the battery side wall, with a shorter heat transfer path and higher heat transfer efficiency. The protrusion feature on the side plate enables the phase change material to form a porous structure in the solid state, increasing the surface area of the phase change material, improving the heat dissipation and heat exchange effects of the phase change material, and further enhancing the battery cooling efficiency.

[0037] 4. The phase change material exchanges heat through the side plate and the cold plate, effectively preventing the phase change material from corroding the cold plate, prolonging the service life of the cold plate, and also avoiding the phase change material from caking or adhering to the cold plate surface, preventing the reduction of heat transfer efficiency, ensuring that the heat transfer efficiency is not affected, and guaranteeing the refrigeration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of the battery cooling device.

[0039] Figure 2 is an exploded schematic diagram of the side plate and the phase change material part.

[0040] Figure 3 It is a schematic diagram of the side plate.

[0041] Figure 4 It is a schematic diagram of the cover-like structure part.

[0042] Figure 5 It is a schematic diagram of the end plate part.

[0043] Explanation of the reference numerals in the drawings: 1. Battery; 11. Side wall; 2. Cold plate; 3. Side plate; 31. Cover-like structure; 311. Outer edge; 32. Phase change material; 33. Protrusion; 331. Stamping pit; 34. Heat conduction edge; 35. Buckling part; 4. End plate. Specific embodiments

[0044] The following further describes the present application in detail with reference to the accompanying drawings.

[0045] As Figures 1-2 shown, a battery cooling device for cooling the battery 1 includes a cold plate 2 and a plurality of side plates 3. The side plates 3 are arranged outside the side wall 11 of the battery 1. Both the side plates 3 and the battery 1 are placed on the cold plate 2. Among them, a cover-like structure 31 is formed on the side plate 3. The edge of the cover-like structure 31 abuts against the side wall 11 of the battery 1. A containing space is formed by enclosing the cover-like structure 31 and the side wall 11 of the battery 1. The phase change material 32 is arranged in the containing space. The phase change material 32 is in contact with the side wall 11. Heat transfer is formed between the side plate 3 and the phase change material 32, and between the cold plate 2 and the side plate 3.

[0046] Specifically, when arranging the phase change material 32, the phase change material 32 is poured into the cover-like structure 31 in a liquid state. After the phase change material 32 solidifies, the cover-like structure 31 is abutted against the side wall 11 of the battery 1.

[0047] Specifically, the phase change material 32 can be selected from paraffin-based, microencapsulated phase change materials or nano-composite phase change materials, etc. according to requirements and the temperature of the battery 1.

[0048] It should be noted that preferably, the cold plate 2 is a liquid cold plate 2. A pipeline is arranged in the cold plate 2, and a coolant flows in the pipeline; more preferably, the cold plate 2 is a phase change cold plate 2. The refrigerant is compressed into a high-temperature and high-pressure gas by the compressor of the thermal management system, condensed into a normal-temperature and high-pressure liquid by the condenser, and then enters the expansion valve to expand into a low-temperature and low-pressure two-phase flow and enter the cold plate 2. The two-phase flow absorbs the heat of the battery 1 and completely becomes a gas, and returns to the compressor through the expansion valve to complete a complete cycle.

[0049] The phase change material 32 is in direct contact with the side wall 11 of the battery 1, resulting in a shorter heat transfer path and higher heat transfer efficiency. Compared with the indirect contact between the cold plate 2 and the battery 1 in the traditional liquid cooling system, this design directly contacts the side wall 11 of the battery 1, effectively shortening the heat transfer path, significantly improving the heat transfer efficiency, and quickly reducing the temperature of the battery 1.

[0050] During the phase change process, the phase change material 32 absorbs a large amount of heat, effectively storing the heat generated by the battery 1 and slowing down the rising speed of the battery 1 temperature. The phase change process of the phase change material 32 is equivalent to a heat storage device, which can effectively store the heat generated by the battery 1, prevent the temperature from rising too fast, further improve the cooling efficiency. Through effective heat transfer and storage, the temperature of the battery 1 can be controlled within a reasonable range, reducing the internal chemical reaction rate of the battery 1, decreasing the aging speed of the battery 1, and extending the life of the battery 1. Controlling the temperature of the battery 1 can slow down the internal chemical reaction rate of the battery 1, reduce the probability of side reactions, effectively slow down the aging speed of the battery 1, and extend the service life of the battery 1. Effectively preventing the temperature of the battery 1 from being too high can avoid thermal runaway of the battery 1 and improve the safety performance of the battery 1. Effectively controlling the temperature of the battery 1 can effectively prevent the battery 1 from having thermal runaway, ensure the safe operation of the battery 1, and avoid safety accidents.

[0051] Furthermore, the corrosion of the cold plate 2 by the phase change material 32 is avoided. The phase change material 32 does not directly contact the cold plate 2, effectively preventing the phase change material 32 from corroding the cold plate 2 and extending the service life of the cold plate 2. This design avoids the direct contact between the phase change material 32 and the cold plate 2, prevents the phase change material 32 from corroding the cold plate 2, extends the service life of the cold plate 2, and improves the system reliability.

[0052] Even further, the phase change material 32 does not directly contact the cold plate 2, avoiding the caking or attachment of the phase change material 32 on the surface of the cold plate 2, preventing the reduction of heat transfer efficiency, and ensuring the refrigeration effect. Avoiding the direct contact between the phase change material 32 and the cold plate 2 can effectively prevent the caking or attachment of the phase change material 32 on the surface of the cold plate 2, ensuring that the heat transfer efficiency is not affected and guaranteeing the refrigeration effect.

[0053] The phase change material 32 is placed on both sides and the cold plate 2 is arranged below, which can both play a certain cooling effect on the battery 1 components, achieving multi-directional cooling, reducing the phenomenon of excessive temperature difference in each area of the battery 1, and extending the service life of the battery 1.

[0054] In addition, the above structure is relatively simple, easy to manufacture, and can be conveniently applied to various types of batteries 1. The simple structure is easy to manufacture, can effectively reduce costs, is convenient to be applied to various types of batteries 1, and has good application prospects.

[0055] This application can adjust the design of the side plate 3 and the cover-like structure 31 according to the sizes and heat dissipation requirements of different batteries 1 to achieve flexible application.

[0056] As shown Figures 3-4 in the figure, there are multiple protrusions 33 provided inside the cover-like structure 31, and the protrusions 33 extend from the bottom of the cover-like structure 31 towards the side wall 11. The protrusion 33 feature on the side plate 3 enables the phase change material 32 to form a porous structure, increasing the surface area of the phase change material 32, improving the heat dissipation and heat exchange effects of the phase change material 32, and further enhancing the cooling efficiency of the battery 1. The porous structure can effectively increase the contact area between the phase change material 32 and the surrounding environment, improve the heat transfer efficiency, and achieve a more efficient heat dissipation effect.

[0057] Furthermore, as shown Figure 4 in the figure, an outer edge 311 is connected to the side plate 3. The outer edge 311 forms a circle on the side plate 3 and extends from the side plate 3 towards the side wall 11. The outer edge 311 abuts against the side wall 11, and the outer edge 311 is connected to the side plate 3 to form the cover-like structure 31.

[0058] The outer edge 311 abuts against the side wall 11 of the battery 1, effectively sealing the side plate 3 and the side wall 11 of the battery 1 to form an accommodating space, fixing the phase change material 32 therein, preventing the phase change material 32 from leaking. The sealed accommodating space can effectively concentrate the heat between the phase change material 32 and the battery 1, improve the heat transfer efficiency, and accelerate the cooling speed.

[0059] The outer edge 311 connects the side plate 3 and the side wall 11 of the battery 1 together to form a stable structure, which can effectively prevent the side plate 3 from deforming or falling off during use.

[0060] To improve the feasibility of the manufacturing process, the outer edge 311 is directly connected to the side plate 3, which is convenient for manufacturing, reduces the production cost. The integrated design of the outer edge 311 and the side plate 3 can simplify the manufacturing process, improve the production efficiency, and reduce the production cost.

[0061] Furthermore, a sealing structure is provided at one end of the outer edge 311 that abuts against the side wall 11. As shown Figure 2 in the figure, the battery 1 is composed of multiple battery 1 modules, and there is a gap between every two battery 1 modules. At least the gap within the coverage of the cover-like structure 31 is also filled with a sealing structure to ensure that the phase change material 32 does not leak.

[0062] The above-mentioned sealing structure needs to be selected according to the usage requirements and the selection of the phase change material 32. Preferably, the above-mentioned sealing structure is selected as film encapsulation, such as polyethylene, polypropylene, polyester, nylon, polytetrafluoroethylene, etc., which has low cost, simple operation, and can achieve seals of various shapes; preferably, metal encapsulation is selected, such as aluminum, copper, stainless steel, etc., which has high mechanical strength, good high-temperature resistance, and reliable sealing performance; preferably, ceramic encapsulation is selected, such as alumina, zirconia, etc., which has excellent high-temperature resistance and good chemical stability, and reliable sealing performance.

[0063] Furthermore, as Figure 4 shown, one end of the protrusion 33 is connected to the bottom of the lid-like structure 31, and the other end of the protrusion 33 abuts against the side wall 11. Preferably, the protrusion 33 is hemispherical, and a plurality of protrusions 33 are arranged in a rectangular array within the lid-like structure 31. To enhance the heat transfer between the phase change material 32 and the side wall 11 of the battery 1, with the setting of the protrusions 33, the original planar contact surface between the side plate 3 and the side wall 11 of the battery 1 is changed into a plurality of hemispherical protrusions 33, effectively increasing the contact area between the phase change material 32 and the side wall 11 of the battery 1 and improving the heat transfer efficiency.

[0064] Moreover, the hemispherical protrusions 33 can effectively guide the flow of the phase change material 32 around the protrusions 33, promoting heat exchange between the phase change material 32 and the side wall 11 of the battery 1 and improving the heat exchange efficiency.

[0065] It should be noted that the protrusions 33 can also be selected in other shapes including cylindrical, conical, and prismatic shapes.

[0066] Furthermore, as Figures 3-4 shown, the lower ends of the two oppositely arranged side plates 3 are bent in opposite directions to form heat-conducting edges 34, and the heat-conducting edges 34 abut against the cold plate 2. With the setting of the heat-conducting edges 34, the relatively small contact area between the original side plate 3 and the cold plate 2 is expanded to the area of the entire heat-conducting edge 34, effectively improving the heat transfer efficiency. Reducing the thermal resistance, the heat-conducting edges 34 can reduce the thermal resistance between the side plate 3 and the cold plate 2, enabling heat to be transferred to the cold plate 2 more quickly, thereby accelerating the heat dissipation rate of the phase change material 32.

[0067] The heat-conducting edges 34 can evenly distribute heat on the surface of the cold plate 2, preventing local overheating from occurring and effectively enhancing the safety performance of the battery 1.

[0068] The heat-conducting edges 34 can also enhance the structural stability to support the side plate 3. The contact between the heat-conducting edges 34 and the cold plate 2 can effectively support the side plate 3, preventing the side plate 3 from deforming or falling off during use and improving the reliability of the battery cooling device.

[0069] The contact between the heat-conducting edges 34 and the cold plate 2 simplifies the installation process of the battery cooling device and improves the installation efficiency. And it is convenient for maintenance. The heat-conducting edge 34 has a simple structure, is easy to disassemble and maintain, and is convenient for repairing and maintaining the battery cooling device.

[0070] As Figure 1 and Figure 5As shown, the battery cooling device further includes a number of end plates 4. The end plates 4 are placed on the cold plate 2. Every two end plates 4 are disposed outside both ends of a battery 1, and every two side plates 3 are disposed outside both sides of a battery 1. Two end plates 4 and two side plates 3 surround the outside of a battery 1. In this way, the structural stability of the battery 1 is enhanced. The end plates 4 are connected to the side plates 3, effectively fixing the side plates 3 and preventing the side plates 3 from deforming or falling off during use, improving the overall structural stability of the battery 1. The impact resistance performance is improved. The structure of the end plates 4 can effectively enhance the impact resistance performance of the battery 1, prevent the battery 1 from being damaged when subjected to external impacts, and improve the reliability of the battery 1.

[0071] Further, both ends of two relatively arranged side plates 3 are bent in the opposite direction to form fastening portions 35. Both sides of each end plate 4 are respectively matched with the fastening portions 35 of two relatively arranged side plates 3. The structural stability is enhanced. The structure of the fastening portions 35 can effectively seal between the side plates 3 and the end plates 4, prevent the phase change material 32 from leaking out from the gap between the side plates 3 and the end plates 4 during use, and improve the safety of the battery 1. It can also prevent the intrusion of the external environment. For example, the structure of the fastening portions 35 can effectively prevent dust, water vapor, etc. in the external environment from entering the interior of the battery 1, ensure the cleanliness of the interior environment of the battery 1, and improve the reliability of the battery 1.

[0072] Both ends of the side plates 3 are connected to two end plates 4, and both ends of the end plates 4 are respectively connected to the fastening portions 35 of two side plates 3. Two end plates 4 and two side plates 3 stably surround the side of the battery 1 for one week. And the structure of the fastening portions 35 is simple. Only bending treatment is done, that is, the inner side of the end plate 4 abuts against the battery 1, and the outer side of the end plate 4 is hooked by the fastening portions 35. The structure is stable and simple, which can simplify the assembly process of the battery 1, improve the assembly efficiency, and ensure the installation accuracy of the battery 1. In addition, the fastening portions 35 can be easily disassembled and replaced, facilitating the maintenance and repair of the battery 1.

[0073] As Figure 1 shown, the number of batteries 1 arranged on each cold plate 2 is one or more. Such a setting can improve the space utilization rate. A single cold plate 2 can cool multiple batteries 1, reducing the number of cold plates 2, thereby reducing the volume of the battery 1, improving the space utilization rate, simplifying the structural design of the battery 1, and reducing the production cost.

[0074] Arranging multiple batteries 1 on the same cold plate 2 can also save costs. A single cold plate 2 can cool multiple batteries 1, enabling better utilization of the heat dissipation capacity of the cold plate 2 and enhancing the heat dissipation effect. It can also simplify the installation process. There is no need to install multiple cold plates 2, reducing the installation steps and improving the production efficiency. Reducing material consumption, reducing the number of cold plates 2, thereby reducing material consumption and lowering the production cost.

[0075] Further, asFigure 5 As shown, the protrusion 33 is formed by stamping and a stamping pit 331 is formed on the side of the side plate 3 opposite to the battery 1. The protrusion 33 is formed by stamping, which simplifies the production process, reduces the production cost, and improves the structural strength. The structure of the stamping pit 331 can improve the structural strength of the side plate 3, enhance the overall strength of the battery 1, and improve its reliability.

[0076] Moreover, since the protrusion 33 is formed by stamping, automated production can be achieved, improving the production efficiency, and the stamping technology can reduce the processing cost.

[0077] In addition, the structure of the stamping pit 331 can effectively prevent heat from accumulating on the side wall 11 of the battery 1, reducing the risk of the battery 1 malfunctioning or having an accident and improving the safety of the battery 1. By improving the heat dissipation uniformity, the structure of the stamping pit 331 can effectively improve the heat dissipation uniformity of the side wall 11 of the battery 1, avoid local overheating, reduce the risk of the battery 1 malfunctioning or having an accident, and improve the safety of the battery 1.

[0078] The embodiments of this specific implementation manner are all preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A battery cooling device, used for cooling a battery (1), comprising a cold plate (2) and a plurality of side plates (3), wherein the side plates (3) are arranged outside the side walls (11) of the battery (1), and the side plates (3) and the battery (1) are both placed on the cold plate (2), characterized in that: A cover-like structure (31) is formed on the side plate (3), the edge of the cover-like structure (31) abuts against the side wall (11) of the battery (1), a phase change material (32) is arranged inside the cover-like structure (31), the phase change material (32) is in contact with the side wall (11), a plurality of protrusions (33) are arranged inside the cover-like structure (31), the protrusions (33) extend from the bottom of the cover-like structure (31) to the side wall (11), and heat transfer is formed between the side plate (3) and the phase change material (32), and between the cold plate (2) and the side plate (3).

2. A battery cooling device according to claim 1, characterized in that: The side plate (3) is connected to an outer edge (311), the outer edge (311) forms a circle on the side plate (3), the outer edge (311) extends from the side plate (3) in the direction of the side wall (11), the outer edge (311) abuts against the side wall (11), and the outer edge (311) is connected to the side plate (3) to form the cover-like structure (31).

3. A battery cooling device according to claim 2, characterized in that: A sealing structure is provided on one end of the outer edge (311) abutting against the side wall (11).

4. A battery cooling device according to claim 1, characterized in that: One end of the protrusion (33) is connected to the bottom of the cover-like structure (31), and the other end of the protrusion (33) abuts against the side wall (11).

5. A battery cooling device according to claim 4, characterized in that: The protrusion (33) is hemispherical, and a plurality of the protrusions (33) are arranged in a rectangular array inside the cover-like structure (31).

6. A battery cooling device according to claim 1, characterized in that: The lower end of the side plate (3) is bent to form a heat-conducting edge (34), and the heat-conducting edge (34) abuts against the cold plate (2).

7. A battery cooling device according to claim 1, characterized in that: It also includes a plurality of end plates (4), the end plates (4) being placed on the cold plate (2), each two end plates (4) being arranged outside the two ends of a battery (1), each two side plates (3) being arranged outside the two sides of a battery (1), and the two end plates (4) and the two side plates (3) being surrounded on the outside of a battery (1).

8. A battery cooling device according to claim 7, characterized in that: The ends of the two oppositely disposed side plates (3) are bent in opposite directions to form buckling portions (35), and the two ends of each end plate (4) respectively cooperate with the buckling portions (35) on the two oppositely disposed side plates (3).

9. A battery cooling device according to claim 1, characterized in that: The number of batteries (1) arranged on each cold plate (2) is one or more.

10. The battery cooling device according to claim 1, characterized in that: The protrusion (33) is formed by stamping and forms a stamping pit (331) on the side of the side plate (3) opposite to the battery (1).

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