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Electric vehicle battery thermal management method, electronic device and vehicle

A battery thermal management, electric vehicle technology, applied in the automotive field to achieve the effect of extending the service life

Active Publication Date: 2021-08-03
WM SMART MOBILITY (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide a battery thermal management method for electric vehicles, electronic equipment and automotive

Method used

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  • Electric vehicle battery thermal management method, electronic device and vehicle
  • Electric vehicle battery thermal management method, electronic device and vehicle
  • Electric vehicle battery thermal management method, electronic device and vehicle

Examples

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Embodiment Construction

[0061] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0062] Such as figure 1 Shown is a working flow chart of an electric vehicle battery thermal management method according to an embodiment of the present invention, including:

[0063] Step S101, responding to the vehicle AC charging start event;

[0064] Step S102: Determine a first battery heating target temperature threshold and an AC rechargeable battery heating prediction time corresponding to the first battery heating target temperature threshold based on the lowest cell temperature of the battery at the start of AC charging;

[0065] Step S103, calculating the proportional factor of the predicted heating time of the AC rechargeable battery and the total predicted time of AC charging, the total predicted time of AC charging being the sum of the predicted time of AC charging and the predicted heating time of the AC rechargeable b...

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Abstract

The invention discloses a battery thermal management method for an electric vehicle, electronic equipment, and the vehicle. The method includes: responding to a vehicle AC charging start event; determining a first battery heating target temperature threshold based on the lowest battery cell temperature at the start of AC charging , and the predicted heating time of the AC rechargeable battery corresponding to the first battery heating target temperature threshold; calculating the proportional factor of the predicted heating time of the AC rechargeable battery and the total predicted time of AC charging; determining the second battery heating target temperature threshold corresponding to the proportional factor ;Comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as the final battery heating target temperature threshold; heating the battery to the final battery temperature Heating target temperature threshold. The invention takes into account the service life of the battery core (or battery core discharge capacity) and the AC charging time, and performs thermal management on the battery.

Description

technical field [0001] The invention relates to the technical field related to automobiles, in particular to a heat management method for electric vehicle batteries, electronic equipment and automobiles. Background technique [0002] Within the allowable charging temperature range, the charging power of AC charging (also known as slow charging) to the battery pack is generally a constant value (such as 3.3kW for portable AC charging equipment). At this time, when the cell temperature is low (such as -20°C), due to the long-term low cell temperature has a great impact on the cycle life of the cell and the discharge capacity of the cell (for example, the ternary lithium-ion battery at 0°C The discharge capacity is increased by about 10% compared to -10°C, the lower the minimum temperature of the initial cell, the more obvious the effect of increasing the cell temperature), and the power consumption of battery heating will increase the AC charging time to a certain extent. In o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/12B60L58/27
CPCB60L58/12B60L58/27Y02T10/70
Inventor 肖军
Owner WM SMART MOBILITY (SHANGHAI) CO LTD
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