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Battery energy processing method and device, and vehicle

A processing method and battery energy technology, applied in battery/fuel cell control devices, electric vehicles, vehicle components, etc., can solve problems such as battery power decline, battery power consumption, and battery mileage impact, and achieve the goal of improving vehicle efficiency Effect

Pending Publication Date: 2021-12-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the condition of -30°C, the discharge capacity of the battery is basically zero, making the battery unusable
In order to be able to use the battery in a low temperature environment, it is necessary to heat the battery before using it, but when the battery is heated by vibration, it will consume a part of the battery power, causing the battery power to drop and affecting the battery life.

Method used

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  • Battery energy processing method and device, and vehicle
  • Battery energy processing method and device, and vehicle
  • Battery energy processing method and device, and vehicle

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0128] The on-board charging module is an on-board charger. When the charging gun is inserted into the DC charging port of the vehicle, it detects whether the battery is heated, and uses a motor drive circuit to oscillate and heat the battery. figure 2 It is a schematic circuit diagram for battery energy processing provided by an exemplary embodiment. Such as figure 2 As shown, the charging pile 10, the on-board charging module 20 and the battery 30 form a charging circuit, and the battery 30 and the motor drive circuit 40 form a battery oscillation heating circuit. The first control unit 50 may be in a battery management system, and the second control unit 60 may be in a motor controller.

[0129]The charging pile 10 is connected to the battery 30 through the on-board charging module 20, the second control unit 60 is connected to the battery 30 through the motor drive circuit 40, and the first control unit 50 is connected to the charging pile 10, the on-board charging modu...

example 2

[0139] Figure 5 is a signaling interaction diagram for battery energy processing provided by another exemplary embodiment. In this embodiment, the on-board charging module is an on-board charger. During the charging process, when a heating demand is received, such as Figure 5 As shown, the motor drive circuit is used for DC charging (51-01 and 52-01). During the charging process, it is detected that the condition for starting oscillation heating (52-02) is met, and then the battery oscillation heating is started, and the original DC needs to be cut off. The charging circuit (if it is the same circuit, it does not need to be disconnected), switch to the on-board charging module circuit for DC charging while the battery is oscillating and heating. When the first control unit recognizes that the vehicle meets the conditions for starting oscillation heating, it sends a "ready to start" message to the on-board charging module and the second control unit (52-03), and at the same ...

example 3

[0141] Figure 6 is a signaling interaction diagram for battery energy processing provided by yet another exemplary embodiment. In this embodiment, the on-board charging module is a compressor or a step-up DC module. In the case of charging and heating demand, such as Figure 6 As shown, when the DC charging is started by inserting the gun, the first control unit of the vehicle will exchange handshake messages and identification messages with the charging pile after the self-test module itself and the vehicle have no faults (61-01, 62-01, 61 -02, 62-02-1). The first control unit completes pre-charging of the main circuit of the vehicle (62-03) and closes the main contactor of the vehicle, and the vehicle is in a state of high voltage. During this process, the first control unit detects that the condition for starting oscillation heating (62-02-2), for example, detects that the battery temperature is low and needs to start the battery oscillation heating system to heat the ba...

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PUM

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Abstract

The invention relates to a battery energy processing method and device, and a vehicle. The method comprises steps that when a charging instruction is received, a battery heating state of the vehicle is determined; according to the battery heating state of the vehicle, a target charging mode is selected from multiple preset charging modes, and multiple preset charging modes comprise a normal process charging mode and a small-current voltage-stabilizing charging mode; and if the selected target charging mode is the low-current voltage-stabilizing charging mode, a first charging demand is sent to a charging pile so that the charging pile outputs current to charge the battery according to the first charging demand. The method is advantaged in that when the battery needs to be charged and heated at the same time, a corresponding charging demand is sent to the charging pile, so the charging pile outputs electric energy in a corresponding mode, it is guaranteed that the battery can be safely and effectively heated while the battery is charged, and therefore vehicle using efficiency is improved.

Description

technical field [0001] The present disclosure relates to the field of vehicle charging control, in particular, to a battery energy processing method and device, and a vehicle. Background technique [0002] With the widespread use of new energy sources, batteries can be used as power sources in the vehicle field. Depending on the environment in which the battery is used as a power source, the performance of the battery will also be affected. In a low temperature environment, the performance of the battery will be reduced to a greater extent than that at normal temperature. For example, the discharge capacity of a battery at sub-zero temperatures decreases as the temperature decreases. Under the condition of -30°C, the discharge capacity of the battery is basically zero, making the battery unusable. In order to be able to use the battery in a low-temperature environment, it is necessary to heat the battery before using it. However, when the battery is heated by vibration, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/60B60L53/66B60L58/27H01M10/44H01M10/615H01M10/625H01M10/633
CPCB60L53/60B60L53/66B60L58/27H01M10/44H01M10/615H01M10/625H01M10/633Y02E60/10Y02T10/70Y02T10/7072Y02T90/12Y02T90/16
Inventor 凌和平闫磊彭星星宋金梦袁帅
Owner BYD CO LTD