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Battery heating control method and device

A battery heating and battery technology, applied to secondary batteries, battery temperature control, circuits, etc., can solve the problems of inaccurate temperature detection and control, and achieve the effect of direct, accurate and accurate internal temperature

Active Publication Date: 2014-01-29
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the technical problem of inaccurate overall control caused by inaccurate temperature detection in the prior art, the present invention provides a control method and device capable of accurately detecting and controlling battery heating

Method used

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  • Battery heating control method and device
  • Battery heating control method and device

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Embodiment

[0038] This embodiment can be divided into three parts, starting heating part, staged heating cycle part and stopping heating part. figure 1 It is a flowchart of a method for controlling battery heating according to an embodiment of the present invention, such as figure 1 As shown in the figure, after “starting” and before “starting the heating of the battery” are the condition judgment parts for starting the heating in this method; after “starting the heating of the battery” and before “stopping the heating of the battery”, both sides The process in the flow chart is the judging part of the stop condition, and the middle cycle is the cycle of the segmented heating process before the heating is stopped.

[0039] The method for controlling battery heating provided in this embodiment is generally divided into two steps: when the conditions for starting heating are met, start heating the battery; and when the conditions for stopping heating are met, stop heating the battery.

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Abstract

The invention provides a battery heating control method comprising the following steps of starting heating a battery when heating starting conditions are met, and stopping heating the battery when heating stopping conditions are met, wherein the heating stopping conditions are as follows: the internal resistance R of the battery is reduced to a stopping internal resistance setting value Rstop of the battery or the heating time T7 is up to the maximum heating time setting value Tmax. Meanwhile, the invention provides a battery heating control device comprising a battery heating unit, a control unit, an internal resistance detecting unit and a first timing unit. The internal resistance and the time are used as the heating stopping conditions in the method provided by the invention. The internal resistance is changed very sensitively along with the temperature when the battery is at low temperature, and the internal resistance is changed a little along with the service life of the battery, so that the internal temperature of the battery can be accurately judged and the heating can be more accurately controlled according to the internal resistance.

Description

technical field [0001] The invention belongs to the field of battery heating, in particular to a method and device for controlling battery heating. Background technique [0002] At present, lithium batteries have become ideal power sources for portable electronic devices and electric vehicles. Considering that the car needs to drive under complex road conditions and environmental conditions, or some electronic equipment needs to be used in poor environmental conditions, the battery used as the power supply of electric vehicles or electronic equipment needs to adapt to these complex conditions, especially when electric When the vehicle or electronic equipment is in a low-temperature environment, the battery needs to have excellent low-temperature charge and discharge performance and high output and input power performance. [0003] In order to improve the performance of the battery, when we use the battery in a low temperature environment, we usually need to heat it to achie...

Claims

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Application Information

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IPC IPC(8): H01M10/60
CPCH01M10/615H01M10/633Y02E60/10
Inventor 刘进贾晓辉
Owner BYD CO LTD
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