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Power battery, power battery temperature control method and new energy vehicle

A technology for power batteries and battery casings, applied in the field of power batteries, can solve problems such as poor temperature control of power batteries, achieve excellent temperature control effects, good impact resistance, and make up for assembly tolerances

Active Publication Date: 2020-10-02
矩阵数据科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the deficiencies of the prior art, the present invention provides a power battery and a new energy vehicle, which are used to solve the problem of poor temperature control of the power battery and how to maintain the temperature consistency of the battery cell in the working state, and provide a A new energy vehicle using the power battery

Method used

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  • Power battery, power battery temperature control method and new energy vehicle
  • Power battery, power battery temperature control method and new energy vehicle
  • Power battery, power battery temperature control method and new energy vehicle

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Embodiment Construction

[0049] 18650 is a lithium-ion battery (hereinafter referred to as the cell) is a standard lithium-ion battery model, where 18 means a diameter of 18mm, 65 means a length of 65mm, and 0 means a cylindrical battery. Common 18650 batteries are divided into lithium-ion batteries and lithium iron phosphate batteries. The voltage of lithium ion battery is 3.6V and 4.2V, the voltage of lithium iron phosphate battery is 3.2V, the capacity is usually 1200mAh-3000mAh, and the common capacity is 2200mAh-3600mAh.

[0050] This embodiment is implemented based on the battery cell 00 as a model.

[0051] In the prior art manuals, metal materials have better heat conduction performance, so metal materials are often used as heat conduction materials, represented by copper tubes, aluminum tubes and stainless steel tubes.

[0052] In the thermal design of the power battery, the use of conductive metal heat-conducting materials should be avoided. Metal heat-conducting materials are likely to cause...

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Abstract

The invention discloses a power battery, a temperature control method of the power battery and a new energy vehicle to solve the problem of poor temperature control of existing power batteries. The power battery comprises a casing, cells, flexible heat-conducting strips and finger plate tools, wherein gaps I between the cells and gaps II between the cells and the inner wall of the battery casing are filled with flexible heat-conducting strips arranged in pairs, and the finger plate tools are inserted in gaps between the flexible heat-conducting strips to be in surface contact with the flexibleheat-conducting strips; each flexible heat-conducting strip comprises a flexible heat-conducting material, a copper tube, an electric heating wire and a temperature sensor, and two ends of each flexible heat-conducting strip extend to the outer side of the battery casing and are connected with a heat-conducting solution circulating system and an electric control system. The power battery adoptingthe structure has an excellent temperature control effect and can have multiple effects of thermal insulation, heating and cooling of the cells, so that the cells are always within the best working temperature range, and the temperature difference between the cells in a battery pack can be controlled within + / -3 DEG C.

Description

technical field [0001] The invention relates to the field of power battery technology, one of the core technologies of new energy vehicles. Background technique [0002] The power battery is the power source of new energy vehicles, and the quality of its temperature control system directly affects the mileage of the vehicle. Take the 18650 cylindrical lithium battery cell as an example. Thousands of cells are integrated in each electric vehicle. During each charging and discharging process, a large amount of heat will be generated inside the cell along with charging and discharging, resulting in a drop in battery temperature. The temperature control system is an important means to control the cells to work normally within the set temperature range, so the temperature control system plays a vital role. [0003] There are two main heat dissipation methods for power batteries at present: air-cooled heat dissipation and water-cooled heat dissipation. Water-cooled heat dissipati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M10/48H01M10/613H01M10/615H01M10/625H01M10/655
CPCH01M10/0525H01M10/486H01M10/613H01M10/615H01M10/625H01M10/655Y02E60/10
Inventor 孔瑞清
Owner 矩阵数据科技(上海)有限公司
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