Battery device, heat exchange plate and electric appliance

Abstract

The application discloses a battery device, a heat exchange plate and an electric equipment, and relates to the technical field of batteries. The battery device comprises a battery monomer and a heat exchange plate, at least one side of the battery monomer is attached to the heat exchange plate; the heat exchange plate comprises a first plate body and a second plate body, the first plate body and the second plate body are oppositely arranged and at least partially connected, the heat exchange plate has a heat exchange area and a connecting area, the connecting area is arranged around the heat exchange area, the heat exchange area is provided with a heat exchange flow channel, at least one of the first plate body and the second plate body is recessed with a groove part corresponding to the connecting area, and the edge of the first plate body corresponding to the connecting area is attached to the edge of the second plate body corresponding to the connecting area. The technical scheme can improve the problem that the heat exchange working medium in the heat exchange plate can be corroded to the edge of the heat exchange plate quickly.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device, heat exchange plate, and electrical equipment. Background Technology

[0002] A heat exchange plate typically consists of two plates, one of which is stamped to form heat exchange channels. The areas of the two plates without channels are then welded together. However, with prolonged use, the heat exchange medium gradually seeps along the corroded weld area. Typically, the heat exchange medium within the heat exchange plate can easily corrode to the edge of the plate within a short period, leading to heat exchange plate failure. Utility Model Content

[0003] The main objective of this application is to provide a battery device, heat exchange plate, and electrical equipment, which aims to improve the problem that the heat exchange medium in the heat exchange plate of the battery device can quickly corrode to the edge of the heat exchange plate.

[0004] To achieve the above objectives, the present application proposes a battery device, a battery cell, and a heat exchange plate, wherein at least one side of the battery cell is attached to the heat exchange plate; the heat exchange plate includes a first plate body and a second plate body, the first plate body and the second plate body are disposed opposite to each other and at least partially connected, the heat exchange plate has a heat exchange area and a connection area, the connection area is disposed around the heat exchange area, the heat exchange area is provided with a heat exchange flow channel, at least one of the first plate body and the second plate body is recessed with a groove portion corresponding to the connection area, and the edge of the first plate body corresponding to the connection area is attached and connected to the edge of the second plate body corresponding to the connection area.

[0005] The technical solution of this application involves attaching at least one side of the battery cell to a heat exchange plate, which allows the heat exchange plate to dissipate heat from the battery cell, thereby reducing the temperature of the battery cell and thus reducing the risk of thermal runaway.

[0006] By arranging the first and second plates of a heat exchange plate opposite to each other and at least partially connected, the heat exchange plate includes a heat exchange area and a connecting area. The connecting area surrounds the heat exchange area, and the edge of the first plate corresponding to the connecting area is fitted and connected to the edge of the second plate corresponding to the connecting area. This allows the edge of the connecting area to provide a good sealing effect for the heat exchange channels within the heat exchange area. By providing grooves in the connecting area of ​​the first and second plates, a barrier is essentially constructed between the periphery of the heat exchange channels and the edge of the heat exchange plate. When the heat exchange medium in the heat exchange channels corrodes the interface between the first and second plates and permeates outwards, the grooves allow the corroded medium to be buffered at the grooves and also extend the permeation path, increasing its complexity and thus prolonging the time it takes for the heat exchange medium to reach the edge of the heat exchange plate.

[0007] In addition, the grooved section facilitates the accumulation of welding material at the connection between the grooved section and the plate, which further delays the corrosion time of the heat exchange medium at this point, thereby extending the time for the heat exchange medium to corrode to the edge of the heat exchange plate.

[0008] In one embodiment of this application, the groove is annular and surrounds the periphery of the heat exchange channel.

[0009] With this design, no matter which direction the heat exchange medium tries to penetrate outward, it will be blocked by the groove, thus achieving uniform corrosion everywhere and improving the sealing durability of the heat exchange plate.

[0010] In one embodiment of this application, the second plate is disposed on the side of the first plate away from the battery cell, at least a portion of the groove is disposed on the second plate, and the groove disposed on the second plate is recessed in the direction away from the first plate.

[0011] This design allows the heat exchange medium to flow into the groove under gravity when it corrodes to the groove, effectively buffering the medium and delaying corrosion to the edge of the heat exchange plate. Furthermore, it allows more of the weld layer between the first and second plates to flow into the groove during welding, increasing the connection strength between the groove and the first plate and further slowing down the rate of corrosion of the recessed area by the heat exchange medium.

[0012] In one embodiment of this application, the groove portion includes a first groove and a second groove, the first groove being formed on the first plate and the second groove being formed on the second plate; the first groove and the second groove have the same recess direction, and the groove wall of the first groove is fitted and connected to the groove wall of the second groove.

[0013] This configuration increases the contact area between the first and second plates, thereby improving the structural strength and sealing of the connection area; it also increases the corrosion path and slows down the rate at which the heat exchange medium corrodes to the edge of the heat exchange plate.

[0014] In one embodiment of this application, the recessed direction of the groove portion is the same as the recessed direction of the heat exchange channel.

[0015] This setup allows for the use of molds in the same direction to process the grooves and heat exchange channels, thereby simplifying the production process, reducing manufacturing costs, and improving production efficiency.

[0016] In one embodiment of this application, the recess depth of the groove portion is consistent with the recess depth of the heat exchange channel.

[0017] With this setup, stamping can be performed using the same mold during the stamping process, meaning that the heat exchange channel can be formed while the groove is being formed.

[0018] In one embodiment of this application, at least two grooves are provided in the direction from the side of the connection area near the heat exchange area to the side of the connection area away from the heat exchange area.

[0019] This configuration further prolongs the corrosion path and delays the time it takes for the heat exchange medium to flow to the edge of the heat exchange plate.

[0020] In one embodiment of this application, at least two of the groove portions have the same depth dimension.

[0021] This setup allows for the use of standardized molds and process parameters to machine at least two grooves with the same depth, reducing the number and complexity of molds. It also ensures that the strength of each groove is comparable, thereby reducing the risk of localized stress concentration.

[0022] In one embodiment of this application, the groove is filled with sealant, which seals the first plate and the second plate together.

[0023] This design achieves a good sealing effect, further preventing the heat exchange medium from penetrating towards the edge of the heat exchange plate. On the other hand, the sealant is more resistant to corrosion by the heat exchange medium, thus further delaying the time it takes for the heat exchange medium to corrode to the edge of the heat exchange plate.

[0024] In one embodiment of this application, one of the first plate and the second plate is a flat plate, and the other plate is provided with the heat exchange channel and the groove.

[0025] This design simplifies the manufacturing process of the heat exchange plate. The flat plate can be easily bonded to the bottom surface of the battery cell over a large area, improving heat exchange efficiency. Furthermore, concentrating the heat exchange channels and grooves on another plate facilitates mass production by stamping, while the flat plate does not require further processing, thus reducing manufacturing costs.

[0026] This application also proposes a heat exchange plate for use in a battery device. The heat exchange plate includes a first plate and a second plate. The first plate and the second plate are disposed opposite to each other and at least partially connected. A heat exchange area and a connection area are formed between the first plate and the second plate. The connection area is disposed around the heat exchange area. The heat exchange area is provided with a heat exchange channel. At least one of the first plate and the second plate is recessed with a groove corresponding to the connection area. The edge of the first plate corresponding to the connection area is fitted and connected to the edge of the second plate corresponding to the connection area.

[0027] By arranging the first and second plates of a heat exchange plate opposite to each other and at least partially connected, the heat exchange plate includes a heat exchange area and a connecting area. The connecting area surrounds the heat exchange area, and the edge of the first plate corresponding to the connecting area is fitted and connected to the edge of the second plate corresponding to the connecting area. This allows the edge of the connecting area to provide a good sealing effect for the heat exchange channels within the heat exchange area. By providing grooves in the connecting area of ​​the first and second plates, a barrier is essentially constructed between the periphery of the heat exchange channels and the edge of the heat exchange plate. When the heat exchange medium in the heat exchange channels corrodes the interface between the first and second plates and permeates outwards, the grooves allow the corroded medium to be buffered at the grooves and also extend the permeation path, increasing its complexity and thus prolonging the time it takes for the heat exchange medium to reach the edge of the heat exchange plate.

[0028] In addition, the grooved section facilitates the accumulation of welding material at the connection between the grooved section and the plate, which further delays the corrosion time of the heat exchange medium at this point, thereby extending the time for the heat exchange medium to corrode to the edge of the heat exchange plate.

[0029] This application also proposes an electrical device including the aforementioned battery device. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application; Figure 2 This is an exploded view of the battery device according to some embodiments of this application; Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application; Figure 4 This is a bottom view of a heat exchange plate in a battery device according to some embodiments of this application; Figure 5 This is an exploded structural diagram of one embodiment of the heat exchange plate in the battery device of some embodiments of this application; Figure 6 This is a partial schematic diagram of a longitudinal sectional view of one embodiment of a heat exchange plate in a battery device according to some embodiments of this application; Figure 7This is a partial schematic diagram of a longitudinal sectional view of another embodiment of the heat exchange plate in the battery device of some embodiments of this application; Figure 8 This is a partial schematic diagram of a longitudinal sectional view of yet another embodiment of the heat exchange plate in the battery device of some embodiments of this application; Figure 9 This is an exploded structural diagram of another embodiment of the heat exchange plate in the battery device of some embodiments of this application; Figure 10 for Figure 9 A schematic diagram of one embodiment of a longitudinal sectional view; Figure 11 This is a schematic diagram of the structure in which the groove of the heat exchange plate in the battery device of some embodiments of this application is filled with sealant.

[0032] Explanation of icon numbers: 1000, vehicles; 100. Battery assembly; 200. Controller; 300. Motor; 10. Box body; 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Housing; 23. Electrode assembly; 23a. Tab; 30. Heat exchange plate; 31. First plate; 32. Second plate; 30a. Heat exchange zone; 30b. Connection zone; 301. Heat exchange channel; 302. Groove; 3021. First groove; 3022. Second groove; 303. Sealant.

[0033] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0037] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0038] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0039] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0040] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0041] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0042] Please refer to Figure 2 The battery device 100 includes a housing 10 and battery cells 20, with the battery cells 20 housed within the housing 10. The housing 10 provides a space for the battery cells 20 and can have various structures. In some embodiments, the housing 10 may include a first part and a second part, which overlap each other, together defining a space for accommodating the battery cells 20. The second part may be a hollow structure with one open end, while the first part may be a plate-like structure, with the first part covering the open side of the second part so that the first and second parts together define the space. Alternatively, both the first and second parts may be hollow structures with one open side, with the open side of the first part covering the open side of the second part. Of course, the housing 10 formed by the first and second parts can have various shapes, such as a cylinder or a cuboid.

[0043] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0044] Please refer to Figure 3 , Figure 2 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit constituting the battery device 100. For example... Figure 3 The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0045] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, allowing battery cell 20 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0046] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0047] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals 21a to form a current loop.

[0048] In the battery device 100, there can be multiple battery cells 20. These multiple battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that some of the multiple battery cells 20 are connected in series while others are in parallel. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of these multiple battery cells 20 is housed within the housing 10. (For further details, please refer to...) Figure 2 The battery device 100 can also consist of multiple battery cells 20 connected in series, parallel, or in a mixed configuration to form a battery cell assembly, which is then connected in series, parallel, or in a mixed configuration to form a whole and housed within the housing 10. For example... Figure 2 As shown, the battery device 100 may also include other structures. For example, the battery device 100 may also include a heat exchange plate 30, which is usually located below the battery cell 20 or the battery cell assembly. It may be located inside the housing 10 or directly serve as the bottom plate of the housing 10.

[0049] The heat exchange plate 30 typically consists of two plates, one of which is stamped to form a heat exchange channel 301. The areas of the two plates without channels are then welded together. For example, a composite layer is usually coated on one of the plates to act as a primary material to prevent outward corrosion of the coolant within the internal channels. However, under long-term use, the corrosion path of the heat exchange medium within the heat exchange plate 30 on the composite layer material is related to the plate's structure. Typically, the welded area between the two plates of the heat exchange plate 30 is planar. Therefore, when the heat exchange medium corrodes the connection structure between the two plates, it can directly reach the edge areas of the two plates, allowing the heat exchange medium to penetrate to the edge of the heat exchange plate 30 in a very short time, leading to its failure.

[0050] To address the issue of insufficient time for the heat exchange medium in the heat exchange plate 30 of the battery device 100 to corrode to the edge of the heat exchange plate 30, please refer to the following reference. Figure 2 , Figure 4 , Figure 5 as well as Figure 6 Or please refer to the following: Figure 2 , Figure 9 as well as Figure 10 This application proposes a battery device 100, which includes a battery cell 20 and a heat exchange plate 30. At least one side of the battery cell 20 is attached to the heat exchange plate 30. The heat exchange plate 30 includes a first plate body 31 and a second plate body 32, the first plate body 31 and the second plate body 32 are disposed opposite to each other and at least partially connected. The heat exchange plate 30 has a heat exchange area 30a and a connecting area 30b. The connecting area 30b is disposed around the heat exchange area 30a. The heat exchange area 30a is provided with a heat exchange flow channel 301. At least one of the first plate body 31 and the second plate body 32 is recessed with a groove portion 302 corresponding to the connecting area 30b. The edge of the first plate body 31 corresponding to the connecting area 30b is attached and connected to the edge of the second plate body 32 corresponding to the connecting area 30b.

[0051] The heat exchange plate 30 can be located at the bottom of the battery cell 20, or, if necessary, at the side of the battery cell 20. When the heat exchange plate 30 is located at the bottom of the battery cell 20, one of the first plate 31 and the second plate 32 can serve as the upper plate, and the other as the lower plate. For example, the first plate 31 can be the upper plate, and the second plate 32 can be the lower plate, in which case the first plate 31 is in contact with the battery cell 20; or the first plate 31 can be the lower plate, and the second plate 32 can be the upper plate, in which case the second plate 32 is in contact with the battery cell 20. The first plate 31 and the second plate 32 can be made of materials with good thermal conductivity, such as aluminum alloy, stainless steel, or copper. The overall outer contour of the first plate 31 and the second plate 32 can be rectangular, elliptical, or other shapes.

[0052] The heat exchange plate 30 has a connecting area 30b and a heat exchange area 30a. The connecting area 30b is the region where the first plate 31 and the second plate 32 are connected, and the heat exchange area 30a is the region where the heat exchange medium can flow. At least one of the first plate 31 and the second plate 32 can be pre-formed by stamping, or at least one of the first plate 31 and the second plate 32 can be pre-formed by extrusion molding or milling. Thus, when the edge of the first plate 31 corresponding to the connecting area 30b and the edge of the second plate 32 corresponding to the connecting area 30b are in contact with each other, a closed heat exchange channel 301 is formed between them. The edge of the connecting area 30b is the side of the connecting area 30b away from the heat exchange area 30a, which is also the edge of the entire heat exchange plate 30. The cross-sectional shape of the heat exchange channel 301 can be semi-circular, circular, or rectangular, and the orientation shape of the heat exchange channel 301 can be straight, L-shaped, U-shaped, S-shaped, or other irregular shapes. The connecting area 30b is arranged around the heat exchange area 30a, so that when the first plate 31 and the second plate 32 are connected through the connecting area 30b, the connecting area 30b can seal the heat exchange channel 301, thereby reducing the risk of the heat exchange medium in the heat exchange channel 301 flowing out from the gap between the first plate 31 and the second plate 32.

[0053] At least one of the first plate 31 and the second plate 32 has a recessed groove 302 corresponding to the connecting area 30b. This means that the first plate 31 has a recessed groove 302, which can be recessed toward the second plate 32 or toward the direction away from the second plate 32; or the second plate 32 has a recessed groove 302, which can be recessed toward the first plate 31 or toward the direction away from the first plate 31; or both the first plate 31 and the second plate 32 have recessed grooves 302, the groove 302 on the first plate 31 can be recessed toward the second plate 32 or toward the direction away from the second plate 32, and the groove 302 on the second plate 32 can be recessed toward the first plate 31 or toward the direction away from the first plate 31. When both the first plate 31 and the second plate 32 are provided with grooves 302, the grooves 302 of the first plate 31 and the grooves 302 of the second plate 32 can be arranged opposite each other, and the two oppositely arranged grooves 302 can fit together or have a gap. Alternatively, when both the first plate 31 and the second plate 32 are provided with grooves 302, the grooves 302 on the first plate 31 can be offset from the grooves 302 on the second plate 32, and the recessed direction of the grooves 302 on the first plate 31 can be the same as or different from the recessed direction of the grooves 302 on the second plate 32. It should be noted that the grooves 302 in this application are not connected to the heat exchange channel 301. The grooves 302 can be provided between the edges of the heat exchange zone 30a and the connecting zone 30b, or they can be provided at the edge of the connecting zone 30b.

[0054] The cross-sectional shape of the groove 302 can be V-shaped, U-shaped, W-shaped, or other groove structures. The trajectory of the groove 302 can be annular, straight segment, curved segment, or broken line segment. When the trajectory of the groove 302 is a straight segment, the straight segment can be located on one side of the heat exchange zone 30a, or the groove 302 can be composed of at least a plurality of straight segments, which are spaced apart circumferentially along the heat exchange zone 30a. When the trajectory of the groove 302 is a broken line segment, the groove 302 can be located on at least two adjacent sides of the heat exchange zone 30a.

[0055] The technical solution of this application, by attaching at least one side of the battery cell 20 to the heat exchange plate 30, enables the heat exchange plate 30 to dissipate heat from the battery cell 20, thereby reducing the temperature of the battery cell 20 and thus reducing the risk of thermal runaway. By having the first plate 31 and the second plate 32 of the heat exchange plate 30 arranged opposite to each other and at least partially connected, the heat exchange plate 30 includes a heat exchange region 30a and a connecting region 30b. The connecting region 30b surrounds the heat exchange region 30a. The edge of the first plate 31 corresponding to the edge of the connecting region 30b is attached and connected to the edge of the second plate 32 corresponding to the edge of the connecting region 30b. Therefore, the edge of the connecting region 30b can provide a good sealing effect for the heat exchange channel 301 within the heat exchange region 30a. By providing a groove 302 in the connection area 30b of the first plate 31 and the second plate 32, a barrier is essentially constructed between the periphery of the heat exchange channel 301 and the edge of the heat exchange plate 30. When the heat exchange medium in the heat exchange channel 301 corrodes the connection interface of the first plate 31 and the second plate 32 and permeates outward, the groove 302 can buffer the heat exchange medium when it corrodes to the groove 302. On the other hand, it can extend the permeation path and increase the complexity of the permeation path, thereby extending the time it takes for the heat exchange medium to reach the edge of the heat exchange plate 30.

[0056] In addition, after the groove 302 is provided, the connection between the groove 302 and the plate is easier to accumulate welding material, which can further delay the time for the heat exchange medium to corrode this area, thereby extending the time for the heat exchange medium to corrode to the edge of the heat exchange plate 30.

[0057] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the groove portion 302 is annular and surrounds the periphery of the heat exchange channel 301.

[0058] Specifically, the groove 302 can be a continuous, closed annular groove formed on the first plate 31 and / or the second plate 32 by a stamping process. For example, it can be a rectangular annular, circular annular, or other annular shape, as long as the trajectory of the groove 302 on the heat exchange plate 30 is a closed pattern. This annular groove 302 surrounds the outside of the heat exchange channel 301, i.e., from the bottom view of the heat exchange plate 30 (e.g., ...). Figure 4 As shown in the figure, the annular groove 302 surrounds the entire heat exchange channel 301.

[0059] By setting the groove 302 as an annular shape and surrounding the heat exchange channel 301, the groove 302 can form an all-round enclosure of the heat exchange channel 301. Thus, no matter which direction the heat exchange medium tries to penetrate outward, it will be blocked by the groove 302, thereby achieving a uniform corrosion effect and improving the sealing durability of the heat exchange plate 30.

[0060] Please refer to the reference. Figure 2 , Figure 5 as well as Figure 6 In one embodiment of this application, the second plate 32 is disposed on the side of the first plate 31 away from the battery cell 20, at least a portion of the groove portion 302 is disposed on the second plate 32, and the groove portion 302 disposed on the second plate 32 is recessed in the direction away from the first plate 31.

[0061] The second plate 32 is located on the side of the first plate 31 opposite to the battery cell 20, thus the second plate 32 is located at the bottom of the first plate 31. The welding layer can be a solder layer or a composite layer material (e.g., aluminum-silicon alloy) coated on the surface of the second plate 32. During the welding process, the welding layer melts at a high temperature, thereby welding the first plate 31 and the second plate 32 together. The groove portion 302 is at least partially provided on the second plate 32, meaning that a portion of the groove portion 302 is provided on the second plate 32 and another portion of the groove portion 302 is provided on the first plate 31; or the groove portion 302 is entirely provided on the second plate 32.

[0062] By placing the second plate 32 on the side of the first plate 31 away from the battery cell 20, the second plate 32 can be located below the first plate 31. With a welding layer provided on the surface of the second plate 32 facing the first plate 31, and at least a portion of the groove 302 disposed on the second plate 32, and the groove 302 on the second plate 32 being recessed in the direction away from the first plate 31, when the heat exchange medium corrodes to the groove 302, the heat exchange medium can flow into the groove 302 under gravity, thereby achieving the effect of buffering the heat exchange medium in the groove 302 and delaying the time it takes for the heat exchange medium to corrode to the edge of the heat exchange plate 30. In addition, this structure allows the weld layer between the first plate 31 and the second plate 32 to flow into the groove 302 during the welding process, which improves the connection strength between the groove 302 and the first plate 31. Furthermore, as more of the weld layer material flows into the groove 302 during the high-temperature melting process, the weld layer thickness at the groove 302 is larger, thereby further slowing down the rate at which the heat exchange medium corrodes the recess.

[0063] like Figure 6 As shown, in one embodiment of this application, the groove portion 302 includes a first groove 3021 and a second groove 3022. The first groove 3021 is formed on the first plate 31, and the second groove 3022 is formed on the second plate 32. The first groove 3021 and the second groove 3022 have the same recess direction, and the groove wall of the first groove 3021 is in close contact with the groove wall of the second groove 3022.

[0064] The groove portion 302 is jointly formed by two grooves respectively provided on the first plate 31 and the second plate 32. The first groove 3021 and the second groove 3022 can be arranged opposite to each other. When the first groove 3021 and the second groove 3022 are arranged opposite to each other, their concave directions are the same. For example, taking the first plate 31 and the second plate 32 as being arranged opposite each other in the vertical direction, with the second plate 32 located below the first plate 31, the first groove 3021 and the second groove 3022 can both be concave upwards or both be concave downwards. The groove wall of the first groove 3021 and the groove wall of the second groove 3022 are fitted together, meaning that the sidewall of the first groove 3021 and the sidewall of the second groove 3022 are fitted together, with one groove embedded in the other. For example, when both the first groove 3021 and the second groove 3022 are concave downwards, the groove wall of the first groove 3021 is embedded in the second groove 3022; or when both the first groove 3021 and the second groove 3022 are concave upwards, the groove wall of the second groove 3022 is embedded in the first groove 3021. When the groove walls of the first groove 3021 and the second groove 3022 are fitted together, they can be fixedly connected by welding or other methods.

[0065] This configuration increases the contact area between the first plate 31 and the second plate 32, thereby improving the structural strength and sealing of the connection area 30b. Of course, this configuration also increases the corrosion path, slowing down the rate at which the heat exchange medium corrodes to the edge of the heat exchange plate 30.

[0066] like Figure 6 As shown, in one embodiment of this application, the recessed direction of the groove portion 302 is the same as the recessed direction of the heat exchange channel 301.

[0067] Specifically, if the heat exchange channel 301 is formed by pressing the second plate 32 downwards and recessing it, then the groove portion 302 is also formed by pressing the second plate 32 downwards and recessing it.

[0068] With this configuration, the groove 302 and the heat exchange channel 301 can be machined using a mold in the same direction, thereby simplifying the production process, reducing manufacturing costs, and improving production efficiency.

[0069] like Figure 7 As shown, in one embodiment of this application, the recess depth of the groove portion 302 is consistent with the recess depth of the heat exchange channel 301.

[0070] The recess depth refers to the vertical distance between the inner bottom wall of the groove 302 or the inner bottom wall of the heat exchange channel 301 and the reference plane of the plate on which it is located, where no recess has occurred. The recess depth dimension of the heat exchange channel 301 is defined as H1, and the recess depth of the groove 302 is defined as H2. In this embodiment, H1 is equal to H2.

[0071] By setting the recess depth of the groove 302 to be consistent with the recess depth of the heat exchange channel 301, the same die can be used for stamping during the stamping process. This means that the groove 302 is formed simultaneously with the heat exchange channel 301, further simplifying the production process, reducing manufacturing costs, and improving production efficiency. Furthermore, this design ensures that the depth of the groove 302 is appropriate, reducing the risk of the heat exchange medium rapidly corroding the edge of the heat exchange plate 30 due to an excessively shallow groove 302, and also reducing the risk of the heat exchange medium directly eroding through the plate due to an excessively deep groove 302, which would result in a thinner plate.

[0072] like Figure 8 As shown, in one embodiment of this application, at least two groove portions 302 are provided in the direction from the side of the connection area 30b near the heat exchange area 30a to the side of the connection area 30b away from the heat exchange area 30a.

[0073] "The side of the connecting area 30b that is closer to the heat exchange area 30a" refers to the inner edge of the connecting area 30b, and "the side of the connecting area 30b that is farther away from the heat exchange area 30a" refers to the outer edge of the connecting area 30b, that is, the edge that is closer to the outer periphery of the heat exchange plate 30.

[0074] By providing at least two grooves 302 in the direction from the side of the connection area 30b near the heat exchange area 30a to the side of the connection area 30b away from the heat exchange area 30a, it is equivalent to setting up multiple lines of defense around the heat exchange channel 301, which further extends the corrosion path, delays the time for the heat exchange medium to flow to the edge of the heat exchange plate 30, and improves the service life of the heat exchange plate 30.

[0075] like Figure 8 As shown, in one embodiment of this application, at least two of the groove portions 302 have the same depth dimension.

[0076] This configuration allows for the use of standardized molds and process parameters to machine at least two grooves 302 with identical depth dimensions during manufacturing, reducing the number and complexity of molds. Furthermore, when at least two grooves 302 have the same depth dimension, the strength at each groove 302 is comparable, thereby reducing the risk of localized stress concentration and improving the structural stability and reliability of the heat exchange plate 30.

[0077] like Figure 11 As shown, in one embodiment of this application, the groove 302 is filled with sealant 303, and the sealant 303 seals the connection between the first plate 31 and the second plate 32.

[0078] Sealant 303 can be a material with good adhesion and corrosion resistance, such as polyurethane adhesive, silicone adhesive, or epoxy resin adhesive.

[0079] With this configuration, the sealant 303 itself forms a physical sealing barrier, which on the one hand can achieve a good sealing effect, thereby further preventing the heat exchange medium from penetrating towards the edge of the heat exchange plate 30; on the other hand, the sealant 303 is more resistant to corrosion of the heat exchange medium than the weld layer at the interface between the first plate 31 and the second plate 32, thus further delaying the time it takes for the heat exchange medium to corrode to the edge of the heat exchange plate 30.

[0080] like Figure 11 As shown, in one embodiment of this application, one of the first plate 31 and the second plate 32 is a flat plate, and the other is provided with the heat exchange channel 301 and the groove portion 302.

[0081] For example, the first plate 31 is a flat metal plate, while the second plate 32 is formed with heat exchange channels 301 and grooves 302 through processes such as stamping. Of course, for ease of connection, the heat exchange channels 301 and grooves 302 on the second plate 32 are recessed in the direction away from the first plate 31. Alternatively, the second plate 32 is flat, and the first plate 31 has heat exchange channels 301 and grooves 302; for ease of connection, the heat exchange channels 301 and grooves 302 on the first plate 31 are recessed in the direction away from the second plate 32.

[0082] This design simplifies the manufacturing process of the heat exchange plate 30. The flat plate can easily fit into the bottom surface of the battery cell 20 over a large area, improving heat exchange efficiency. Furthermore, by concentrating the heat exchange channel 301 and the groove 302 on another plate, it is easier to carry out mass production by stamping. The flat plate does not need to be processed again, thereby reducing manufacturing costs.

[0083] This application also proposes a heat exchange plate 30 applied to a battery device 100. The specific structure of the battery device 100 is as described in the above embodiments. Since this heat exchange plate 30 adopts all the technical solutions of all embodiments of the heat exchange plate 30 in the above-described battery device 100, it at least has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here. Please refer to the following references. Figures 4 to 8 Or please refer to the following: Figures 9 to 10 The heat exchange plate 30 includes a first plate body 31 and a second plate body 32. The first plate body 31 and the second plate body 32 are disposed opposite to each other and at least partially connected. A heat exchange zone 30a and a connecting zone 30b are formed between the first plate body 31 and the second plate body 32. The connecting zone 30b is disposed around the heat exchange zone 30a. The heat exchange zone 30a is provided with a heat exchange flow channel 301. At least one of the first plate body 31 and the second plate body 32 is recessed with a groove portion 302 corresponding to the connecting zone 30b. The edge of the first plate body 31 corresponding to the connecting zone 30b is fitted and connected to the edge of the second plate body 32 corresponding to the connecting zone 30b.

[0084] The heat exchange plate 30 has a connecting area 30b and a heat exchange area 30a. The connecting area 30b is the region where the first plate 31 and the second plate 32 are connected, and the heat exchange area 30a is the region where the heat exchange medium can flow. At least one of the first plate 31 and the second plate 32 can be pre-formed by stamping, or at least one of the first plate 31 and the second plate 32 can be pre-formed by extrusion molding or milling. Thus, when the edge of the first plate 31 corresponding to the connecting area 30b and the edge of the second plate 32 corresponding to the connecting area 30b are in contact with each other, a closed heat exchange channel 301 is formed between them. The edge of the connecting area 30b is the side of the connecting area 30b away from the heat exchange area 30a, which is also the edge of the entire heat exchange plate 30. The cross-sectional shape of the heat exchange channel 301 can be semi-circular, circular, or rectangular, and the orientation shape of the heat exchange channel 301 can be straight, L-shaped, U-shaped, S-shaped, or other irregular shapes. The connecting area 30b is arranged around the heat exchange area 30a, so that when the first plate 31 and the second plate 32 are connected through the connecting area 30b, the connecting area 30b can seal the heat exchange channel 301, thereby reducing the risk of the heat exchange medium in the heat exchange channel 301 flowing out from the gap between the first plate 31 and the second plate 32.

[0085] At least one of the first plate 31 and the second plate 32 has a recessed groove 302 corresponding to the connecting area 30b. This means that the first plate 31 has a recessed groove 302, which can be recessed toward the second plate 32 or toward the direction away from the second plate 32; or the second plate 32 has a recessed groove 302, which can be recessed toward the first plate 31 or toward the direction away from the first plate 31; or both the first plate 31 and the second plate 32 have recessed grooves 302, the groove 302 on the first plate 31 can be recessed toward the second plate 32 or toward the direction away from the second plate 32, and the groove 302 on the second plate 32 can be recessed toward the first plate 31 or toward the direction away from the first plate 31. When both the first plate 31 and the second plate 32 are provided with grooves 302, the grooves 302 of the first plate 31 and the grooves 302 of the second plate 32 can be arranged opposite each other, and the two oppositely arranged grooves 302 can fit together or have a gap. Alternatively, when both the first plate 31 and the second plate 32 are provided with grooves 302, the grooves 302 on the first plate 31 can be offset from the grooves 302 on the second plate 32, and the recessed direction of the grooves 302 on the first plate 31 can be the same as or different from the recessed direction of the grooves 302 on the second plate 32. It should be noted that the grooves 302 in this application are not connected to the heat exchange channel 301. The grooves 302 can be provided between the edges of the heat exchange zone 30a and the connecting zone 30b, or they can be provided at the edge of the connecting zone 30b.

[0086] The cross-sectional shape of the groove 302 can be V-shaped, U-shaped, W-shaped, or other groove structures. The trajectory of the groove 302 can be annular, straight segment, curved segment, or broken line segment. When the trajectory of the groove 302 is a straight segment, the straight segment can be located on one side of the heat exchange zone 30a, or the groove 302 can be composed of at least a plurality of straight segments, which are spaced apart circumferentially along the heat exchange zone 30a. When the trajectory of the groove 302 is a broken line segment, the groove 302 can be located on at least two adjacent sides of the heat exchange zone 30a.

[0087] The technical solution of this application involves the first plate 31 and the second plate 32 of the heat exchange plate 30 being arranged opposite to each other and at least partially connected. The heat exchange plate 30 includes a heat exchange area 30a and a connecting area 30b. The connecting area 30b is arranged around the heat exchange area 30a. The edge of the first plate 31 corresponding to the connecting area 30b is fitted and connected to the edge of the second plate 32 corresponding to the connecting area 30b. Thus, the edge of the connecting area 30b can have a good sealing effect on the heat exchange channel 301 in the heat exchange area 30a. By providing a groove 302 in the connection area 30b of the first plate 31 and the second plate 32, a barrier is essentially constructed between the periphery of the heat exchange channel 301 and the edge of the heat exchange plate 30. When the heat exchange medium in the heat exchange channel 301 corrodes the connection interface of the first plate 31 and the second plate 32 and permeates outward, the groove 302 can buffer the heat exchange medium when it corrodes to the groove 302. On the other hand, it can extend the permeation path and increase the complexity of the permeation path, thereby extending the time it takes for the heat exchange medium to reach the edge of the heat exchange plate 30.

[0088] In addition, after the groove 302 is provided, the connection between the groove 302 and the plate is easier to accumulate welding material, which can further delay the time for the heat exchange medium to corrode this area, thereby extending the time for the heat exchange medium to corrode to the edge of the heat exchange plate 30.

[0089] This application also proposes an electrical device. As shown in FIG1, the electrical device includes a battery device 100, the specific structure of which is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. Specifically, the electrical device can be any of the aforementioned devices or systems that utilize the battery device 100.

[0090] The above are merely exemplary embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized in that, include: Battery cell; and A heat exchange plate, wherein at least one side of the battery cell is attached to the heat exchange plate; the heat exchange plate includes a first plate body and a second plate body; The first plate and the second plate are disposed opposite to each other and are at least partially connected. The heat exchange plate has a heat exchange area and a connecting area. The connecting area is disposed around the heat exchange area. The heat exchange area is provided with a heat exchange flow channel. At least one of the first plate and the second plate is recessed with a groove corresponding to the connecting area. The edge of the first plate corresponding to the connecting area is fitted and connected to the edge of the second plate corresponding to the connecting area.

2. The battery device as claimed in claim 1, characterized in that, The groove is annular and surrounds the periphery of the heat exchange channel.

3. The battery device as claimed in claim 1, characterized in that, The second plate is disposed on the side of the first plate away from the battery cell, and at least a portion of the groove is disposed on the second plate, and the groove disposed on the second plate is recessed in the direction away from the first plate.

4. The battery device as claimed in claim 3, characterized in that, The groove portion includes a first groove and a second groove, the first groove being formed on the first plate and the second groove being formed on the second plate; the first groove and the second groove have the same concave direction, and the groove wall of the first groove is fitted and connected to the groove wall of the second groove.

5. The battery device as claimed in claim 1, characterized in that, The recessed direction of the groove is the same as the recessed direction of the heat exchange channel.

6. The battery device as claimed in claim 5, characterized in that, The recessed depth of the groove is consistent with the recessed depth of the heat exchange channel.

7. The battery device according to any one of claims 1 to 6, characterized in that, At least two grooves are provided in the direction from the side of the connection area near the heat exchange area to the side of the connection area away from the heat exchange area.

8. The battery device as claimed in claim 7, characterized in that, At least two of the grooves have the same depth dimension.

9. The battery device according to any one of claims 1 to 6, characterized in that, The groove is filled with sealant, which seals the connection between the first plate and the second plate.

10. The battery device as claimed in claim 9, characterized in that, One of the first plate and the second plate is a flat plate, and the other plate is provided with the heat exchange channel and the groove.

11. A heat exchange plate, characterized in that, The heat exchange plate, used in battery devices, comprises: First plate; and The second plate body is provided opposite to and at least partially connected to the first plate body and the second plate body. A heat exchange area and a connection area are formed between the first plate body and the second plate body. The connection area is arranged around the heat exchange area. The heat exchange area is provided with a heat exchange flow channel. At least one of the first plate body and the second plate body is recessed in the connection area. The edge of the first plate body corresponding to the connection area is fitted and connected to the edge of the second plate body corresponding to the connection area.

12. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 10.

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