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EP-4667862-B1 - HEAT EXCHANGE PLATE AND BATTERY DEVICE

EP4667862B1EP 4667862 B1EP4667862 B1EP 4667862B1EP-4667862-B1

Inventors

  • WANG, QIONG
  • CHEN, JIANXIN

Dates

Publication Date
20260513
Application Date
20241129

Claims (15)

  1. A heat exchange plate, characterized by comprising: a first side plate (1) being of an aluminum structure or an aluminum alloy structure; a second side plate (2), a large face of the second side plate (2) being arranged opposite to a large face of the first side plate (1), and a groove (3) for forming a heat exchange channel (7) being formed in one side of the second side plate (2) facing the first side plate (1); wherein 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 of a steel structure, and the protective layer (22) is of an aluminum structure or an aluminum alloy structure; characterized by a thickness of the second side plate (2) located in an area outside the groove (3) is g mm, a depth of the groove (3) is d mm, and a thickness of the protective layer (22) located in the area outside the groove (3) is x mm, x×0.01×(1-(4.55d-5.36)) > λ×g; and wherein λ is equal to 10%.
  2. The heat exchange plate according to claim 1, characterized in that x×0.01×(1-(4.55d-5.36)) < g-0.45.
  3. The heat exchange plate according to claim 1, characterized in that x is 0.125 to 1.2.
  4. The heat exchange plate according to claim 1, characterized in that g is 0.7 to 1.2.
  5. The heat exchange plate according to claim 1, characterized in that x/g is 0.1 to 1.72.
  6. The heat exchange plate according to claim 1, characterized in that a side face of the groove (3) comprises a circular arc area (311), the second side plate (2) comprises a straight portion (25) located outside the groove (3), a central axis of the circular arc area (311) is parallel to the straight portion (25), and a central angle of the circular arc area (311) is 105° to 120°.
  7. The heat exchange plate according to claim 1, characterized in that a side face of the groove (3) comprises a circular arc area (311), the second side plate (2) comprises a straight portion (25) located outside the groove (3), a central axis of the circular arc area (311) is parallel to the straight portion (25), and a radius of curvature of the circular arc area (311) is greater than or equal to 2 mm.
  8. The heat exchange plate according to claim 1, characterized in that d/g is 1.6 to 6.7.
  9. The heat exchange plate according to any one of claims 1 to 8, characterized by further comprising: a welding layer (4) welded between the first side plate (1) and the second side plate (2), wherein a melting point of the welding layer (4) is lower than a melting point of the protective layer (22), and/or the melting point of the welding layer (4) is lower than a melting point of the first side plate (1).
  10. The heat exchange plate according to claim 9, characterized in that a material of the welding layer (4) is 4-series aluminum.
  11. The heat exchange plate according to any one of claims 1 to 8, characterized in that a material of the protective layer (22) is 1-series aluminum; and/or a material of the first side plate (1) is 3-series aluminum.
  12. The heat exchange plate according to any one of claims 1 to 8, characterized in that the first side plate (1) is of a flat plate structure, a thickness of the first side plate (1) is a mm, a thickness of the main body layer (21) located in the area outside the groove (3) is b mm, and a/b is 0.1 to 9.
  13. A battery device, characterized by comprising the heat exchange plate according to any one of claims 1 to 12.
  14. The battery device according to claim 13, characterized by further comprising a battery (5), wherein the battery (5) is located on one side of the first side plate (1) away from the second side plate (2).
  15. The battery device according to claim 14, characterized in that the thickness of the first side plate (1) is 1 mm to 3 mm.

Description

BACKGROUND Technical Field In the present application, the terms "utility model", "disclosure" and "invention" are used interchangeably and refer to the same subject-matter. The present utility model relates to the technical field of batteries, and more particularly relates to a heat exchange plate and a battery device. Description of Related Art In the related art, a battery device is generally provided with a heat exchange plate which is used for exchanging heat with a battery. In the related art, the heat exchange plate is generally formed by brazing an aluminum alloy stamped plate, and restricted by a brazing filler, a 3-series aluminum sheet is generally adopted as the heat exchange plate. The heat exchange plate adopting the 3-series aluminum sheet is relatively weak in strength, so that deformation and damage of the heat exchange plate are likely to be caused. Especially when the heat exchange plate needs to support the battery, it is difficult to obtain a satisfactory result for vibration and impact modes of a whole package of the battery device. It should be noted that the information disclosed in the above background art section is only used for enhancing an understanding of the background of the present disclosure and thus may include information which does not constitute the prior art known to those ordinarily skilled in the art. CN 219 371 198 U, for instance discloses a heat exchange plate according to the preamble of claim 1. SUMMARY The present utility model provides a heat exchange plate which can ameliorate the technical problem of weak strength thereof. According to an aspect of the present disclosure, the heat exchange plate includes: a first side plate being of an aluminum structure or an aluminum alloy structure;a second side plate, a large face of the second side plate being arranged opposite to a large face of the first side plate, and a groove for forming a heat exchange channel being formed in one side of the second side plate facing the first side plate;wherein 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 of a steel structure, and the protective layer is of an aluminum structure or an aluminum alloy structure;a thickness of the second side plate located in an area outside the groove is g mm, a depth of the groove is d mm, and a thickness of the protective layer located in the area outside the groove is x mm, x×0.01×(1-(4.55d-5.36)) > λ×g; andwherein λ is equal to 10%. On the one hand, in the present utility model, the main body layer in the second side plate is arranged to be of the steel structure, and the steel structure has relatively high strength, so that the arrangement may improve the overall strength of the heat exchange plate; on the other hand, in the present utility model, the protective layer is arranged on one side of the second side plate facing the first side plate, so that the protective layer may not only prevent the main body layer from being corroded by a heat conductive medium between the first side plate and the second side plate, and meanwhile the aluminum-containing protective layer may also improve the welding strength of the first side plate and the second side plate; on another hand, in the present utility model, the thickness of the protective layer is set according to the formula x×0.01×(1-(4.55d-5.36)) > λ×g, since the protective layer will be thinned at a bending position on the side face of the groove, and the depth of the groove will affect a thinning rate of the protective layer at the bending position on the side face of the groove, in the present utility model, the thickness of the protective layer is set according to the depth of the groove and the coefficient λ, so as to ensure that the thickness of the protective layer located at the bending position on the side face of the groove is greater than a 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 on the side face of the groove, and λ×g represents the corrosion depth of the heat exchange medium; and on yet another hand, the steel structure has a relatively low heat conduction speed, and the heat exchange plate may have the function of directional heat dissipation, that is, the heat exchange plate may reduce the amount of heat dissipation from the battery through the second side plate. According to an aspect of the present disclosure, the present utility model further provides a battery device which includes the above heat exchange plate. It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the present disclosure, reference may be made to the examples illustrated in th