Cylindrical power battery module liquid heat management scheme

A technology of cylindrical batteries and power batteries, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of long flow of refrigerant or heat medium, battery temperature difference, etc., and achieve the effect of eliminating the inconsistency of temperature difference
CN109599640AActive Publication Date: 2019-04-09NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2019-04-09

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Abstract

The invention discloses a cylindrical power battery module liquid heat management scheme, and belongs to the technical field of power battery heat management. In the cylindrical power battery module liquid heat management scheme, cylindrical batteries are positioned inside hollow parts of cylindrical shells; spiral coils are arranged outside the cylindrical shells; the spiral coils are wound on the cylindrical shells by different branch coils; an inlet and an outlet of each branch coil are arranged in a staggered mode; the inlet and the outlet of each branch coil adopt symmetric or asymmetricdesign; each branch coil in the spiral coils is respectively connected with a manifold for leading in refrigerant and heat media and a manifold for leading out the refrigerant and heat media by hose connection pipes, and then is connected with a cooling system and a heating system of a battery module; and in a heat exchange mode that the S-shaped coils are wound on the battery cylindrical shells and the batteries are positioned in the shells, when the manifolds are led in, the refrigerant and heat medias are provided for each battery, so as to reduce temperature rise among the batteries in thebattery module and improve temperature consistency among the batteries.
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Description

technical field

[0001] The invention relates to the technical field of thermal management of power batteries, in particular to a liquid thermal management solution for a cylindrical power battery module. Background technique

[0002] Lithium-ion battery is currently the most promising recyclable new energy. It is a research hotspot in academia and industry. It is widely used in pure electric vehicles, hybrid vehicles, portable electronic devices and other fields. However, lithium-ion batteries are very sensitive to temperature, and 20-40°C is their suitable operating temperature range. Too low a temperature will cause the diffusion rate of lithium ions at the interface between the anode and the electrolyte to slow down and cause high polarization resistance. The temperature will lead to the degradation of the SEI film at the interface between the anode and the electrolyte, which will cause a significant drop in battery capacity and power. In addition, lithium-ion batteries ...

Claims

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