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CN-224232727-U - Battery thermal management device and battery pack

CN224232727UCN 224232727 UCN224232727 UCN 224232727UCN-224232727-U

Abstract

The application discloses a battery thermal management device and a battery pack, wherein the battery thermal management device comprises a cold plate and heat-conducting glue, the cold plate comprises a liquid inlet, the flowing direction of a medium in the cold plate is along a first direction, the heat-conducting glue is fixed on the cold plate for attaching and connecting single batteries, a plurality of heat-conducting glue are arranged on a single cold plate at intervals along the first direction, and the arrangement area of the heat-conducting glue on the cold plate is increased along the first direction. The application sets the cold plate for the heat exchange medium to pass through and exchange heat to the single battery, and based on the heat exchange sequence of the medium flowing in the cold plate, a plurality of heat conducting adhesives on the cold plate are in a structure with gradually increased area along the medium flowing direction, the heat conducting adhesives close to the liquid inlet and the medium with stronger heat exchange capacity exchange heat with the single battery, and the heat conducting adhesives far away from the liquid inlet and the medium with weaker heat exchange capacity exchange heat with the single battery, so that the heat conducting adhesives have larger heat exchange area with the single battery, thereby balancing the heat exchange capacity change of the heat exchange medium and improving the heat management uniformity degree of the battery.

Inventors

  • GUAN JUNSHAN

Assignees

  • 中创新航科技集团股份有限公司

Dates

Publication Date
20260512
Application Date
20250604

Claims (10)

  1. 1. A battery thermal management device, comprising: -a cold plate (10), the cold plate (10) comprising a liquid inlet (110), and a medium flow direction within the cold plate (10) being along a first direction; The heat conducting glue (20) is fixedly arranged on the cold plate (10), the heat conducting glue (20) is used for being attached to and connected with the single battery cells (30), a plurality of heat conducting glue (20) are arranged on the cold plate (10) along the first direction at intervals, and the arrangement area of the heat conducting glue (20) on the Leng Ban (10) is increased progressively along the first direction.
  2. 2. The battery thermal management device according to claim 1, wherein the attaching and connecting area of the heat conductive adhesive (20) and the single battery (30) is a 1 , the area of a side wall of the single battery (30) to be mounted, which is connected with the heat conductive adhesive (20), is a 2 , and the ratio α=a 1 / A 2 of the two; And the distance between the heat conducting glue (20) and the liquid inlet (110) of the cold plate (10) is Lmm, and alpha=L/10000+0.0016.
  3. 3. The battery thermal management device of claim 2, wherein α ranges from 0.007 to 0.3.
  4. 4. The battery thermal management device according to claim 1, comprising a plurality of the cold plates (10) arranged at intervals along a second direction, wherein the second direction is perpendicular to the first direction, the heat-conducting glue (20) is arranged on one side of each of two adjacent cold plates (10) facing each other, and the single battery (30) is sandwiched between the two adjacent cold plates (10) along the second direction.
  5. 5. The battery thermal management device according to claim 4, wherein the coverage areas of the heat conductive paste (20) on both sides of the single unit battery (30) in the second direction are equal; the sum of the coverage areas of the heat conducting glue (20) at the two sides of the single battery (30) is B 1 , the area of the outer wall surface of the single battery (30) is B 2 , the ratio of the two is beta=B 1 / B 2 , and the distance between the heat conducting glue (20) and the liquid inlet (110) of the cold plate (10) is Hmm, then beta=0.0003H+0.0032.
  6. 6. The battery thermal management device according to claim 1, wherein the cold plate (10) is provided with the heat conductive paste (20) on both sides thereof in the thickness direction, respectively, and the heat conductive paste (20) is provided at intervals in the first direction; The heat-conducting glue (20) is respectively arranged at two sides of the cold plate (10), and the arrangement area on the Leng Ban (10) is gradually increased along the first direction with the same or different change amplitude.
  7. 7. The battery thermal management device according to claim 6, wherein the cold plate (10) has a wave configuration, and the heat conductive adhesive (20) on either side of the cold plate (10) is disposed at a trough position of the cold plate (10) to connect the unit cells (30) of the cylindrical structure.
  8. 8. The battery thermal management device according to claim 7, wherein a ratio of an axial coverage length of the thermally conductive paste (20) in the unit battery (30) to an axial height of the unit battery (30) is 0.6 to 1.
  9. 9. The battery thermal management device according to claim 1, further comprising a foaming glue (40), wherein the foaming glue (40) fills adjacent single batteries (30), and the foaming glue (40) and the heat conducting glue (20) are matched on the outer wall of the single batteries (30) to form a closed surrounding structure.
  10. 10. A battery pack comprising a battery pack constituted by a plurality of unit cells, the battery pack having the battery thermal management device according to any one of claims 1 to 9 provided therein.

Description

Battery thermal management device and battery pack Technical Field The application relates to the technical field of batteries, in particular to a battery thermal management device and a battery pack. Background The battery thermal management device is a device used for adjusting the temperature of a battery in a power battery to ensure that the battery operates in a safe and efficient temperature range, and is of a currently common cold plate structure, and the battery thermal management device flows in the cold plate through a heat exchange medium and exchanges heat with the battery so as to realize temperature regulation and control of the battery, can adapt to a battery gap, and has a compact structure and an efficient heat transfer effect. However, at present, as the energy density requirement of the power battery is gradually increased, the volume and the number of the internal single batteries are also continuously increased, so that the battery close to the liquid inlet of the cold plate and the battery far away from the liquid inlet of the cold plate are caused, and a certain temperature change is generated on the heat exchange medium in the cold plate, so that a relatively obvious heat exchange effect difference occurs, and further the temperature difference between the batteries at two sides of the medium flowing direction in the cold plate is relatively large, so that the thermal management effect of the battery is poor, and the high-efficiency performance of the battery is influenced. Therefore, how to improve the uniformity of thermal management of the batteries at each position in the battery pack and optimize the battery performance is a technical problem to be solved by those skilled in the art. Disclosure of utility model Therefore, the present application is directed to a battery thermal management device and a battery pack, so as to improve the uniformity of thermal management of the battery at each position in the battery pack and optimize the battery performance. In order to achieve the above purpose, the present application provides the following technical solutions: A battery thermal management device, comprising: the cold plate comprises a liquid inlet, and the flow direction of a medium in the cold plate is along a first direction; The heat conducting glue is fixedly arranged on the cold plate and used for being attached to and connected with the single battery, a plurality of heat conducting glue are arranged on the single cold plate along the first direction at intervals, and the arrangement area of the heat conducting glue on the cold plate is increased along the first direction. According to the technical scheme, the battery thermal management device mainly comprises a cold plate and heat conducting glue, wherein the cold plate comprises a liquid inlet for a heat exchange medium to flow in and out, the flow guiding direction of the cold plate is arranged along a single direction, the direction is defined as a first direction, the heat conducting glue is fixedly arranged on the cold plate and used for being connected with a single battery, the heat conducting glue is used for realizing connection between the single battery and the cold plate in a bonding mode, and meanwhile heat conduction between the cold plate and the single battery can be realized. The heat conducting glue is arranged at intervals on the cold plate in the first direction to meet the installation of a plurality of single batteries, and the problem that heat exchange effect is reduced in the heat exchange medium in the cold plate in the heat pipe process is considered, so that the arrangement area of the plurality of heat conducting glue on the cold plate is gradually increased along the first direction, in the battery heat management process, the single batteries close to the liquid inlet position of the cold plate are connected and heat-conducted with the cold plate through the heat conducting glue with smaller area and exchange heat with the medium close to the liquid inlet position and with higher heat exchange capacity, and the single batteries far from the liquid inlet position of the cold plate are connected and heat-conducted with the medium far from the liquid inlet position and with weaker heat exchange capacity through the heat exchange area of the single batteries, so that the heat exchange capacity of the heat exchange medium in different positions on the cold plate is balanced, the even battery heat management effect is further realized, and the performance of the battery is ensured. In another aspect of the present disclosure, there is also provided a battery pack including a battery pack constituted of a plurality of unit cells, in which the battery thermal management device provided in the above embodiment is disposed. Since the battery thermal management device has the above-described effects, the battery pack also has the above-described effects. Drawings In order to more clearly illustrate t