Heat exchange plate and battery device

Abstract

The utility model relates to the technical field of batteries, and provides a heat exchange plate and a battery device, the heat exchange plate comprises a first side plate and a second side plate, the first side plate is an aluminum structure or an aluminum alloy structure; the second side plate and the first side plate are oppositely arranged, and a groove used for forming a heat exchange channel is formed in the side, facing the first side plate, of the second side plate. The second side plate comprises a main body layer and a protective layer, the protective layer is located between the main body layer and the first side plate, the main body layer is of a steel structure, and the protective layer is of an aluminum structure or an aluminum alloy structure; wherein the thickness of the area, located outside the groove, of the second side plate is g mm, the depth of the groove is d mm, the thickness of the area, located outside the groove, of the protective layer is x mm, and x * 0.01 * (1-(4.55 d-5.36)) > lambda * g; lambda is equal to 10%; the side face of the groove comprises an arc area, and the central angle of the arc area ranges from 105 degrees to 120 degrees. X / g is 0.7 to 1.7. The heat exchange plate not only has higher strength, but also can prevent the main body layer from being corroded.

Description

[0001] This application is a divisional application of the utility model application with the application date of June 19, 2024, the Chinese application number 202421416066.4, and the invention name “Heat exchange plate, battery device”. Technical Field

[0002] The utility model relates to the technical field of batteries, in particular to a heat exchange plate and a battery device. Background Art

[0003] In the prior art, battery assemblies are typically equipped with heat exchange plates for heat exchange with the batteries. These plates are typically brazed from aluminum alloy stampings. Due to limitations in brazing fillers, these plates are typically made from 3-series aluminum sheet material, which is relatively weak and prone to deformation and damage. This is especially true when the heat exchange plates support the batteries, making it difficult to achieve satisfactory vibration and impact resistance for the entire battery assembly.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Utility Model Content

[0005] The utility model provides a heat exchange plate, which can improve the technical problem of weak strength of the heat exchange plate.

[0006] According to one aspect of the present disclosure, a heat exchange plate comprises:

[0007] A first side panel, the first side panel is an aluminum structure or an aluminum alloy structure;

[0008] a second side plate, wherein a large surface of the second side plate is arranged opposite to the large surface of the first side plate, and a groove for forming a heat exchange channel is formed on a side of the second side plate facing the first side plate;

[0009] The second side plate includes a main body layer and a protective layer, the protective layer is located between the main body layer and the first side plate, the main body layer is a steel structure, and the protective layer is an aluminum structure or an aluminum alloy structure;

[0010] The thickness of the second side plate outside the groove is g mm, the depth of the groove is d mm, the thickness of the protective layer outside the groove is x mm, and x×0.01×(1-(4.55d-5.36))>λ×g;

[0011] Here, λ is equal to 10%.

[0012] On the one hand, the utility model sets the main body layer in the second side plate as a steel structure, which has high strength. This setting can improve the overall strength of the heat exchange plate; on the other hand, the utility model sets a protective layer on the side of the second side plate facing the first side plate. The protective layer can not only prevent the main body layer from being corroded by the heat-conducting medium between the first side plate and the second side plate, but the aluminum-containing protective layer can also improve the welding strength of the first side plate and the second side plate; on the other hand, the utility model sets the thickness of the protective layer according to the formula x×0.01×(1-(4.55d-5.36))>λ×g. Since the protective layer is on the side of the groove The bending position will be thinned, and the depth of the groove will affect the thinning rate of the protective layer at the bending position of the groove side. The utility model sets the thickness of the protective layer according to the depth of the groove and the coefficient λ to ensure that the thickness of the protective layer at the bending position of the groove side is greater than the corrosion depth of the heat exchange medium, wherein x×0.01×(1-(4.55d-5.36)) represents the thickness of the protective layer at the bending position of the groove side, and λ×g represents the corrosion depth of the heat exchange medium; on the other hand, the steel structure has a lower thermal conductivity, and the heat exchange plate can have the function of directional heat dissipation, that is, the heat exchange plate can reduce the heat dissipation of the battery through the second side plate.

[0013] According to one aspect of the present disclosure, the present invention further provides a battery device, which includes the above-mentioned heat exchange plate.

[0014] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of the present disclosure. Furthermore, related elements or components may have different arrangements as is known in the art. Furthermore, in the drawings, the same reference numerals represent the same or similar components throughout the various figures.

[0016] in:

[0017] Figure 1 This is a schematic structural diagram of an exemplary embodiment of the heat exchange plate disclosed herein;

[0018] Figure 2 for Figure 1 Exploded view of the heat exchange plate shown;

[0019] Figure 3 for Figure 1 A partial cross-sectional view of the heat exchange plate along the dashed line AA is shown;

[0020] Figure 4 for Figure 1A partial cross-sectional view of the second side plate of the heat exchange plate shown along the dotted line AA;

[0021] Figure 5 for Figure 3 A partial cross-sectional view of the heat exchange plate along the dotted line BB is shown;

[0022] Figure 6 This is a schematic structural diagram of an exemplary embodiment of a battery device disclosed herein;

[0023] Figure 7 FIG. 4 is a schematic structural diagram of another exemplary embodiment of a battery device disclosed herein.

[0024] Description of reference numerals:

[0025] 1. First side panel; 2. Second side panel; 21. Main body layer; 22. Protective layer; 3. Groove; 311. Arc area; 32. Bottom surface; 4. Welding layer; 5. Battery; 6. Battery box; 7. Heat exchange channel. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0027] In the description of this disclosure, unless otherwise expressly provided or limited, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more; and the term "and / or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" or "an" object is also intended to mean one of a possible plurality of such objects.

[0028] Unless otherwise specified or explained, the terms "connect," "fixed," etc. should be understood broadly. For example, "connected" may refer to a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; and "connected" may refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0029] Furthermore, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", and "outer" described in the exemplary embodiments of the present disclosure are described from the perspectives shown in the accompanying drawings and should not be understood as limiting the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to one or more "upper", "lower", or "inner" or "outer" of another element, it can not only be directly connected to the "upper", "lower", or "inner" or "outer" of the other one or more elements, but can also be indirectly connected to the "upper", "lower", or "inner" or "outer" of the other one or more elements through an intermediate element.

[0030] like Figure 1-5 As shown, Figure 1 This is a schematic structural diagram of an exemplary embodiment of the heat exchange plate disclosed herein. Figure 2 for Figure 1 The exploded view of the heat exchange plate is shown. Figure 3 for Figure 1 The partial cross-sectional view of the heat exchange plate along the dotted line AA is shown. Figure 4 for Figure 1 A partial cross-sectional view of the second side plate of the heat exchange plate along the dotted line AA is shown. Figure 5 for Figure 3 The heat exchange plate is shown in a partial cross-sectional view along the dotted line BB.

[0031] The heat exchange plate includes: a first side plate 1 and a second side plate 2, the first side plate 1 is an aluminum structure or an aluminum alloy structure; the large surface of the second side plate 2 is arranged opposite to the large surface of the first side plate 1, and a groove 3 for forming a heat exchange channel 7 is formed on the side of the second side plate 2 facing the first side plate 1; wherein, the second side plate 2 includes a main layer 21 and a protective layer 22, the protective layer 22 is located between the main layer 21 and the first side plate 1, the main layer 21 is a steel structure, and the protective layer 22 is an aluminum structure or an aluminum alloy structure; the thickness of the second side plate 2 outside the groove 3 is g mm, the depth of the groove 3 is d mm, and the thickness of the protective layer 22 outside the groove 3 is x mm, x×0.01×(1-(4.55d-5.36))>λ×g; wherein λ is equal to 10%.

[0032] On the one hand, this exemplary embodiment sets the main layer in the second side plate to be a steel structure, which has high strength. This setting can improve the overall strength of the heat exchange plate. On the other hand, this exemplary embodiment sets a protective layer on the side of the second side plate facing the first side plate. The protective layer has corrosion resistance. The protective layer can not only prevent the main layer from being corroded by the heat-conducting medium between the first side plate and the second side plate, but also the aluminum-containing protective layer can improve the welding strength of the first side plate and the second side plate. On the other hand, this exemplary embodiment sets the thickness of the protective layer according to the formula x×0.01×(1-(4.55d-5.36))>λ×g. Since the protective layer will be thinned at the bending position of the groove wall, and the depth of the groove will affect the thinning rate of the protective layer at the bending position of the groove wall, In this exemplary embodiment, the thickness of the protective layer is set according to the depth of the groove and the coefficient λ to ensure that the thickness of the protective layer located at the bending position of the groove wall is greater than the corrosion depth of the heat exchange medium, wherein x×0.01×(1-(4.55d-5.36)) represents the thickness of the protective layer located at the bending position of the groove wall, and λ×g represents the corrosion depth of the heat exchange medium; on the other hand, the steel structure has a lower thermal conductivity, and the heat exchange plate can have a directional heat dissipation function, that is, the heat exchange plate can reduce the heat dissipation of the battery through the second side plate; on the other hand, in this exemplary embodiment, the protective layer is set to an aluminum structure or an aluminum alloy structure. The aluminum-containing protective layer is convenient for welding to the first side plate, and the aluminum-containing protective layer has a higher elongation, so that the thinning rate of the protective layer at the bending position will be relatively low.

[0033] It should be noted that the heat exchange channel within the heat exchange plate can be used to accommodate a heat-conducting medium, which can be a gas or a liquid. The heat-conducting medium circulates within the heat exchange channel to achieve heat exchange with the battery. In addition, the heat-conducting medium can also be a solid. In this exemplary embodiment, the heat exchange plate can both cool the battery and heat the battery. For example, when the battery temperature is high, the heat exchange plate can cool the battery to improve the safety and stability of the battery pack; when the battery is in an extremely cold environment and its normal use is affected by the low temperature, the heat exchange plate can heat the battery to enable the battery pack to adapt to a wider range of usage environments.

[0034] In this exemplary embodiment, Figure 1-5As shown, x / g is 0.1-1.72. For example, x / g can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.72, etc. In this exemplary embodiment, the protective layer 22 and the main body layer 21 can be first composited to form a composite layer, and then the composite layer can be subjected to a process such as stamping to form a groove in the composite layer. In this exemplary embodiment, x / g is set to an appropriate value to facilitate the composite of the protective layer 22 and the main body layer 21 and the subsequent stamping process.

[0035] In this exemplary embodiment, the protective layer 22 and the main body layer 21 may be combined by a hot rolling or cold rolling process to form the second side plate 2 .

[0036] In this exemplary embodiment, Figure 1-5 As shown, x can be 0.125-1.2, for example, x can be equal to 0.125, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, etc. In this exemplary embodiment, x is set to a suitable value, which can prevent the heat exchange plate from being too heavy and the main body layer 21 from being corroded.

[0037] In this exemplary embodiment, Figure 1-5 As shown, the side of the groove 3 includes an arc region 311, and the second side plate 2 includes a straight portion 25 located outside the groove 3. The central axis of the arc region 311 is parallel to the straight portion 25. The central angle α of the arc region 311 is 105°-120°. For example, the central angle of the arc region 311 can be 105°, 106°, 107°, 108°, 109°, 110°, 111°, 112°, 113°, 114°, 115°, 116°, 117°, 118°, 119°, 120°, etc. If the central angle of the arc region 311 is too large, the inclination of the groove side relative to the groove bottom 32 will be relatively gentle. To achieve the same groove depth, the groove 3 needs to have a larger opening size, which will occupy a larger space. If the central angle of the arc region 311 is too small, the requirement for synchronous extension of the main layer 21 and the protective layer 22 is too high. In this exemplary embodiment, the central angle of the arc section 311 is set to an appropriate size. This setting not only facilitates the stamping and forming of the second side panel, but also prevents the groove 3 from occupying too much space on the second side panel 2. The central axis of the arc section 311 is a straight line passing through the center of the arc section 311 and parallel to the arc section 311.

[0038] In this exemplary embodiment, Figure 1-5As shown, the radius of curvature of the arc region 311 is greater than or equal to 2 mm. For example, the radius of curvature of the arc region 311 can be 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4 mm, etc. If the radius of curvature of the arc region 311 is too small, the requirement for synchronous extension of the main layer 21 and the protective layer 22 is too high. In this exemplary embodiment, the radius of curvature of the arc region 311 is set larger, thereby facilitating the synchronous stamping of the main layer 21 and the protective layer 22.

[0039] like Figure 1-5 As shown, the side surface of the groove 3 includes two arcuate areas 311. One arcuate area 311 is connected to the bottom surface 32 of the groove, and the other arcuate area 311 is connected to the flat side surface of the second side plate located outside the groove and facing the first side plate. The two arcuate areas 311 can be directly connected or connected by a flat area.

[0040] In this exemplary embodiment, Figure 1-5 As shown, d / g is 1.6-6.7. d / g can be 1.6, 1.8, 2, 2.2, 2.4, 2.6, 2.8, 3, 3.2, 3.4, 3.6, 3.8, 4, 4.2, 4.4, 4.6, 4.8, 5, 5.2, 5.4, 5.6, 5.8, 6, 6.2, 6.4, 6.6, 6.7, etc. A d / g that is too large increases the material usage of the second side plate 2, increasing costs. A d / g that is too small increases the resistance along the heat exchange channel 7, thereby affecting the flow resistance performance of the entire heat exchange plate. This exemplary embodiment sets d / g to an appropriate value, which can reduce the material usage of the second side plate 2 while also ensuring the flow resistance performance of the heat exchange plate.

[0041] In this exemplary embodiment, Figure 1-5 As shown, g can be 0.7-1.2. For example, g can be 0.7, 0.8, 0.9, 1, 1.1, 1.2, and so on. If g is too large, the overall weight of the heat exchange plate is large; if g is too small, the strength of the second side plate is weak, especially when the second side plate is located at the bottom of the battery box, and the second side plate is easily damaged. In this exemplary embodiment, g is set to an appropriate value, which not only ensures the strength of the heat exchange plate but also prevents the heat exchange plate from being too heavy.

[0042] In this exemplary embodiment, Figure 1-5As shown, the first side plate 1 and the second side plate 2 can be welded using a brazing process. Accordingly, the heat exchange plate may further include a welding layer 4 welded between the first side plate 1 and the second side plate 2, wherein the melting point of the welding layer 4 is lower than the melting point of the protective layer 22, and / or the melting point of the welding layer 4 is lower than the melting point of the first side plate 1. In this exemplary embodiment, the first side plate 1 and the second side plate 2 are welded using a brazing material with a lower melting point. This arrangement not only improves the welding efficiency of the first side plate 1 and the second side plate 2, but also prevents the protective layer 22 from being welded through.

[0043] In this exemplary embodiment, Figure 1-5 As shown, the material of the welding layer 4 can be 4-series aluminum. 4-series aluminum has a relatively low melting point.

[0044] In this exemplary embodiment, Figure 1-5 As shown, the material of the protective layer 22 can be 1 series aluminum; and / or the material of the first side plate 1 can be 3 series aluminum. 1 series aluminum has high corrosion resistance, and the protective layer 22 of 1 series aluminum and the first side plate 1 of 3 series aluminum are easy to weld.

[0045] It should be understood that, in other exemplary embodiments, the welding layer 4 , the protective layer 22 , and the first side plate 1 may also be other series of aluminum structures or aluminum alloy structures.

[0046] In this exemplary embodiment, the aluminum alloy material may be an aluminum-magnesium alloy, an aluminum-manganese alloy, or other materials containing aluminum. Steel is a general term for iron-carbon alloys with a carbon content between 0.02% and 2.11% by mass. The chemical composition of steel can vary greatly, including small amounts of elements such as manganese, phosphorus, silicon, and sulfur. In actual production, steel often contains different alloying elements, such as manganese, nickel, and vanadium, depending on its intended use.

[0047] In this exemplary embodiment, Figure 1-5 As shown, the first side plate 1 can be a flat plate with a thickness of a millimeter. The thickness of the main layer 21 outside the groove 3 is b millimeters. The ratio a / b is 0.1-9. For example, a / b can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 2, 3, 4, 5, 6, 7, 8, 9, etc. If a / b is too large, the thickness of the main layer 21 is too small, and the strength of the heat exchange plate is low. If a / b is too small, the thickness of the first side plate 1 is too small, the strength of the first side plate 1 is weak, and the first side plate 1 is easily damaged when the battery pressure is released. In this exemplary embodiment, a / b is set to an appropriate value, which can ensure the overall strength of the heat exchange plate.

[0048] The area of ​​the second side plate 2 outside the groove 3 is parallel to the first side plate.

[0049] In this exemplary embodiment, the first side plate 1 may also be provided with an insulating anti-corrosion layer and other structures.

[0050] This exemplary embodiment also provides a battery device, which may include the above-mentioned heat exchange plate.

[0051] like Figure 6 FIG2 is a schematic diagram of the structure of an exemplary embodiment of the battery device disclosed herein. The battery device further includes a battery 5 , which is located on a side of the first side plate 1 facing away from the second side plate 2 .

[0052] In this exemplary embodiment, the thickness of the first side plate 1 is 1 mm to 3 mm. For example, the thickness of the first side plate 1 can be 1 mm, 2 mm, 3 mm, etc.

[0053] In this exemplary embodiment, since the second side plate 2 has a relatively high strength, the battery device may not be provided with a bottom guard plate located at the bottom of the battery box. It should be understood that in other exemplary embodiments, the battery device may also be provided with a bottom guard plate to further improve the overall strength of the battery device.

[0054] like Figure 7 FIG2 is a schematic structural diagram of another exemplary embodiment of a battery device according to the present disclosure. The battery device includes a battery box 6 , which includes a bottom plate. The bottom plate of the battery box 6 can be reused as the first side plate 1 .

[0055] It should be noted that a battery comprises a cell and an electrolyte. A battery is the smallest unit capable of carrying out electrochemical reactions such as charge and discharge. A cell is formed by winding or laminating a stack of components, which includes a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. The polarity of the first and second electrodes can be interchangeable. The first and second electrodes are coated with an active material.

[0056] In this exemplary embodiment, the battery may be a lithium-ion battery. It should be understood that in other exemplary embodiments, the battery may also be a nickel-cadmium battery, a nickel-metal hydride battery, a lithium polymer battery, a sodium-ion battery, a solid-state battery, etc.

[0057] In this exemplary embodiment, the battery can be a square battery, that is, the battery can be a quadrangular prism battery. The quadrangular prism battery mainly refers to a battery with a prism shape, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corners between the sides are not necessarily right angles, and can be arc transitions.

[0058] In other exemplary embodiments, the battery may be a cylindrical battery, and the battery case of the cylindrical battery may include two circular end surfaces and a curved surface located between the two circular end surfaces.

[0059] The battery may be a wound battery, that is, a first electrode sheet, a second electrode sheet having electrical properties opposite to the first electrode sheet, and a diaphragm sheet arranged between the first electrode sheet and the second electrode sheet are wound to obtain a roll core.

[0060] In this exemplary embodiment, the battery device is a battery module or a battery pack.

[0061] The battery module includes multiple batteries, which can be prismatic batteries. The battery module can also include end plates and side plates for fixing the multiple batteries. The batteries can be cylindrical batteries, which can be placed on a support plate to form a battery module.

[0062] The battery pack includes multiple batteries and a box body, and the box body is used to fix the multiple batteries.

[0063] It should be noted that the battery pack includes multiple batteries, which can be placed in a housing. The batteries can be assembled into a battery module and then installed in the housing. Alternatively, the batteries can be placed directly in the housing, without grouping them together, and the housing can be used to secure the batteries.

[0064] It should be noted that the battery device proposed in the present invention can be used in various electrical devices, such as mobile phones, portable devices, laptop computers, various vehicles (such as electric vehicles, electric vehicles, etc.), ships, spacecraft, electric toys and electric tools, etc. Furthermore, the above-mentioned spacecraft may include, for example, airplanes, rockets, space shuttles and spacecrafts. The above-mentioned electric toys may include, for example, fixed or mobile electric toys (such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.). The above-mentioned electric tools may include, for example, metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, specifically, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers. It should be understood that in various possible embodiments consistent with the design concept of the present invention, the cylindrical battery or battery device proposed in the present invention is not limited to the devices described above, but can also be applied to all devices that use batteries. For the sake of simplicity, the various embodiments in this specification are described using vehicles as an example.

[0065] The "parallel" mentioned in this application can not only be completely parallel, but also have a certain error; for example, if the angle between the two is greater than or equal to 0° and less than or equal to 5°, the two are considered to be parallel to each other.

[0066] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing what is disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the claims.

[0067] The drawings in this disclosure only relate to the structures involved in this disclosure, and other structures may refer to the general design. In the absence of conflict, the embodiments of this disclosure and the features in the embodiments may be combined with each other to obtain new embodiments. It should be understood by those skilled in the art that the technical solutions of this disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of this disclosure, and should be included in the scope of the claims of this disclosure.

[0068] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A heat exchange plate, characterized in that: The heat exchange plate comprises: A first side plate (1), wherein the first side plate (1) is an aluminum structure or an aluminum alloy structure; a second side plate (2), wherein a large surface of the second side plate (2) is arranged opposite to a large surface of the first side plate (1), and a groove (3) for forming a heat exchange channel (7) is formed on a side of the second side plate (2) facing the first side plate (1); The second side plate (2) comprises a main body layer (21) and a protective layer (22), the protective layer (22) is located between the main body layer (21) and the first side plate (1), the main body layer (21) is a steel structure, and the protective layer (22) is an aluminum structure or an aluminum alloy structure; The thickness of the second side plate (2) outside the groove (3) is g mm, the depth of the groove (3) is d mm, the thickness of the protective layer (22) outside the groove (3) is x mm, and x×0.01×(1-(4.55d-5.36))>λ×g; Where λ is equal to 10%; The side surface of the groove (3) includes an arc area (311), the second side plate (2) includes a straight portion (25) located outside the groove (3), the central axis of the arc area (311) is parallel to the straight portion (25), and the central angle of the arc area (311) is 105°-120°; x / g is 0.7-1.

7.

2. The heat exchange plate according to claim 1, characterized in that x is 0.125-1.

2.

3. The heat exchange plate according to claim 1, characterized in that g is 0.7-1.

2.

4. The heat exchange plate according to claim 1, characterized in that The side surface of the groove (3) includes an arc area (311), the second side plate (2) includes a straight portion (25) located outside the groove (3), the central axis of the arc area (311) is parallel to the straight portion (25), and the curvature radius of the arc area (311) is greater than or equal to 2 mm.

5. The heat exchange plate according to claim 1, characterized in that: d / g is 1.6-6.

7.

6. The heat exchange plate according to any one of claims 1 to 5, characterized in that: The heat exchange plate further comprises: A welding layer (4) is welded between the first side plate (1) and the second side plate (2), the melting point of the welding layer (4) being lower than the melting point of the protective layer (22), and or the melting point of the welding layer (4) being lower than the melting point of the first side plate (1).

7. The heat exchange plate according to claim 6, characterized in that The material of the welding layer (4) is 4 series aluminum.

8. The heat exchange plate according to any one of claims 1 to 5, characterized in that: The material of the protective layer (22) is 1 series aluminum; And / or, the material of the first side plate (1) is 3 series aluminum.

9. The heat exchange plate according to any one of claims 1 to 5, characterized in that: The first side plate (1) is a flat plate structure, the thickness of the first side plate (1) is a millimeter, the thickness of the main body layer (21) outside the groove (3) is b millimeters, and a / b is 0.1-9.

10. A battery device, characterized in that: The battery device comprises the heat exchange plate according to any one of claims 1 to 9.

11. The battery device according to claim 10, characterized in that The battery device further comprises a battery (5), and the battery (5) is located on a side of the first side plate (1) facing away from the second side plate (2).

12. The battery device according to claim 11, wherein: The thickness of the first side plate (1) is 1 mm to 3 mm.

Images