CN-224217552-U - Pole cooling plate for cylindrical battery

Abstract

The utility model discloses a pole cooling plate for a cylindrical battery, and belongs to the technical field of battery cooling. The cooling plate comprises two strip-shaped aluminum alloy plates, namely a first cooling plate and a second cooling plate, wherein a trapezoid cooling flow passage which is arranged in parallel is arranged in the plate body, a contact interface for being attached to a battery pole is formed on one side of the cooling plate, and a convex surface is arranged on the other side of the cooling plate. The contact gap is filled with heat conduction silica gel or phase change material, and insulating powder or insulating layer is filled between the cooling plate and the battery to improve heat conduction efficiency and ensure electrical safety. The structure can realize synchronous cooling of a plurality of pole column areas, improves heat dissipation efficiency, temperature control precision and module safety, and is suitable for the thermal management requirements of new energy automobile battery packs and energy storage systems.

Inventors

• YAN TIANHAO
• LI YONGCHEN
• JIANG JIANHAO
• ZHOU YANCHEN
• WANG BO
• LIU JUNCHAO
• Liu Jiaao
• LI YINLEI

Assignees

• 豫新汽车热管理科技有限公司

Dates

Publication Date

20260508

Application Date

20250616

Claims (5)

1. 1. A pole cooling plate for a cylindrical battery comprises a cooling plate and the cylindrical battery (4) and is characterized in that the cylindrical battery (4) is arranged between the cooling plates, a cooling runner (5) is arranged in the cooling plate, an inlet (3) and an outlet (9) are respectively arranged on two sides of the cooling plate, one surface of the cooling plate is arranged to be attached to a contact interface of the pole of the cylindrical battery (4), the other surface of the cooling plate is arranged to be a convex surface (6), a circular groove (7) recessed towards the inside of the cooling runner (5) is arranged on the convex surface (6), the circular groove (7) enables the cooling runner (5) to form two parallel runners, and the cross section of each parallel runner is trapezoid.
2. 2. A pole cooling plate for a cylindrical battery according to claim 1, characterized in that the circular recess (7) is in contact with the pole shape of the cylindrical battery (4), the contact gap being filled by thermally conductive silicone or phase change material.
3. 3. A pole cooling plate for a cylindrical battery according to claim 1, wherein the cooling plates are elongated aluminum alloy plates, and two cooling plates are provided, namely a first cooling plate (1) and a second cooling plate (2).
4. 4. A pole cooling plate for a cylindrical battery according to claim 3, wherein the inlet (3) and the outlet (9) are symmetrically provided at both sides of the long side of the cooling plate, respectively, and the diameters of the inlet (3) and the outlet (9) are greater than 3mm, respectively, and are connected to external circulation pipes through quick-connect connectors, respectively.
5. 5. A pole cooling plate for a cylindrical battery according to claim 1, characterized in that the contact interface of the cooling plate is provided with an insulating layer (8).

Description

Pole cooling plate for cylindrical battery Technical Field The utility model relates to the technical field of battery cooling plates, in particular to a pole cooling plate for a cylindrical battery. Background Along with the rapid development of high-power application scenes such as new energy automobiles, energy storage systems and the like, cylindrical lithium ion batteries (such as 18650, 21700 and the like) are widely applied to battery modules due to the characteristics of high energy density, mature manufacturing, good system consistency and the like. In practical use, a plurality of cylindrical batteries are often used in groups in a serial-parallel combination mode, and the polar columns (positive and negative electrodes) of the cylindrical batteries are easy to generate significant heat under the high-rate charge and discharge working condition, and especially under the environment of high current density, the local temperature rise of the polar column regions is rapid, so that the cylindrical batteries are key heat dissipation bottlenecks in the module. Traditional module cooling schemes such as bottom cooling, shell side cooling and the like mainly act on the outside of a battery shell, have limited effect in the aspect of pole heat dissipation, and are difficult to meet the increasing thermal management requirements. Currently, some prior art attempts to optimize pole heat dissipation from structural design, runner arrangement, material selection, and the like. For example: Patent document number CN112234274a proposes a cylindrical lithium ion battery thermal management system based on a composite bionic structure, a bionic honeycomb structure is adopted to set a circular through hole in a cooling plate, so that the cooling plate can be sleeved outside a battery, and a hollow heat conduction column and a phase change material are combined for auxiliary heat dissipation. But its construction for single cells is not suitable for integration of large-scale modules. Patent document No. CN212277305U discloses a cooling system of a cylindrical battery module, which adopts a metal water cooling belt to clamp a battery cell up and down, and carries out heat exchange through a plurality of branch cooling pipelines, thereby improving cooling efficiency. But the system is more effective for the surface cooling of the whole module, the direct heat exchange path of the polar column is still far, and the thermal resistance is large. Patent document CN202321710661.4 proposes a battery pack manufacturing method for cooling a polar cylinder, which improves the local heat dissipation capability by arranging a cooling plate on the polar cylinder, and improves the cooling compared with the traditional shell. However, the method is not optimized for multi-cell parallel connection or modular design in terms of structural design and hot runner distribution, and has insufficient universality and assembly efficiency. Therefore, aiming at the problems of the prior art, the pole cooling plate for the cylindrical battery has the advantages of poor heat dissipation effect, complex structure, poor adaptability and unreasonable flow channel design Disclosure of utility model The utility model aims to overcome the existing defects, and provides a pole cooling plate for a cylindrical battery, which can cover pole areas of a plurality of cylindrical batteries at the same time by adopting a strip-shaped cooling plate structure, so that the direct and efficient cooling of the poles is realized, the heat dissipation efficiency is obviously improved, and the actually measured temperature can be reduced by 15-20 ℃; the cooling plate is internally provided with parallel flow channels which are symmetrically distributed, so that the flow path of the cooling liquid is optimized, the pressure drop is effectively reduced, the cooling uniformity is improved, and the problems in the background technology can be effectively solved. In order to achieve the above purpose, the technical scheme is that the pole cooling plate for the cylindrical battery comprises cooling plates and the cylindrical battery, the cylindrical battery is arranged between the cooling plates, cooling flow channels are arranged in the cooling plates, an inlet and an outlet are respectively arranged on two sides of the cooling plates, one surface of the cooling plates is a contact interface for being attached to a pole of the cylindrical battery, the other surface of the cooling plates is a convex surface, a circular groove recessed into the cooling flow channels is formed in the convex surface, the circular groove enables the cooling flow channels to form two parallel flow channels, and the cross section of each parallel flow channel is trapezoid. Further, the round groove is attached to the pole shape of the cylindrical battery, contact gaps are filled with heat-conducting silica gel or phase-change materials, insulating powder is arranged between the cooling plate and