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An electric vehicle, power battery pulse heating system and heating method

A pulse heating and power battery technology, applied in electric vehicles, secondary batteries, secondary battery repair/maintenance, etc., can solve the problems of limited heating efficiency and limited use occasions, and achieve extended system service life, rapid temperature, increase in temperature, etc. The effect of system reliability

Active Publication Date: 2022-05-31
深蓝汽车科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its use is limited, and the pulse heating of the battery must be connected to the grid, and the heating efficiency is limited.

Method used

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  • An electric vehicle, power battery pulse heating system and heating method
  • An electric vehicle, power battery pulse heating system and heating method
  • An electric vehicle, power battery pulse heating system and heating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1: as figure 1 The power battery pulse heating system shown includes battery management system 2, control system 3, motor system, charging system, first controllable switch K1, second controllable switch K2, third controllable switch K3, fourth controllable switch Switch K4. The control terminal of the first controllable switch K1 , the control terminal of the second controllable switch K2 , the control terminal of the third controllable switch K3 and the control terminal of the fourth controllable switch K4 are connected to the control system 3 . The battery management system 2 is connected to the power battery 1. The battery management system 2 monitors the temperature and SOC of the power battery 1 in real time, and determines the pulse current frequency request value f and the pulse current magnitude request value Ireq according to the temperature of the power battery 1 . The battery management system 2 is connected to the control system 3 through a CAN ...

Embodiment 2

[0115] Embodiment 2: as Figure 4 The power battery pulse heating system shown includes a battery management system 2, a control system 3, a motor system, a charging system, a first three-phase controllable switch K5, and a second three-phase controllable switch K6. The control terminal of the first three-phase controllable switch K5 and the control terminal of the second three-phase controllable switch K6 are connected to the control system 3 . The battery management system 2 is connected to the power battery 1. The battery management system 2 monitors the temperature and SOC of the power battery 1 in real time. The battery management system 2 and the control system 3 are connected through the CAN line. Stop request and the temperature of the power battery, the battery management system 2 (from the control system) obtains the status of the charging system connected to the three-phase grid, and the control system 3 determines the pulse current frequency request value f and the...

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PUM

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Abstract

The invention discloses an electric vehicle, a power battery pulse heating system and a heating method, including a battery management system, a control system, a motor system, a first controllable switch K1, a second controllable switch K2, a third controllable switch K3, a second controllable switch Four controllable switch K4 and charging system. It uses the motor system and the charging system to perform pulse heating on the power battery. Compared with the single motor system pulse heating or the single charging system pulse heating, it expands the pulse current adjustable range; Pulse heating with the charging system realizes the expansion of heating power, reduces the duration of single heating, and improves the efficiency of power battery pulse heating. In this way, the high-frequency and high-current rapid charging and discharging process of the power battery is realized, and the purpose of rapidly increasing the temperature of the power battery is achieved by heating the internal resistance of the battery.

Description

technical field [0001] The invention belongs to the technical field of power battery heating, and in particular relates to an electric vehicle, a power battery pulse heating system and a heating method. Background technique [0002] As the main source of power for electric vehicles, the power battery is an important factor in determining the performance of electric vehicles due to its charging and discharging performance. The power batteries of electric vehicles are mostly lithium-ion batteries. Lithium-ion batteries have the advantages of high energy, high battery voltage, wide operating temperature range, and long storage life. However, lithium ions will undergo lithium precipitation in a low temperature environment, which will cause the power battery to fail to output a large current for a long time, greatly reducing the charge and discharge performance of electric vehicles at low temperatures. However, the lithium ionization current of lithium batteries at low temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/27B60L58/12B60L15/20H01M10/615H01M10/625H01M10/633H01M10/42
CPCB60L58/27B60L58/12B60L15/2045H01M10/615H01M10/625H01M10/633H01M10/425B60L2240/545H01M2010/4271Y02T10/72
Inventor 彭钱磊陈富杜长虹邓承浩冉彦杰郑援张扬彭杰
Owner 深蓝汽车科技有限公司
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