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Battery temperature rise rate alarm method

A heating rate, battery technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problem that the battery temperature change cannot be alarmed in time

Inactive Publication Date: 2017-08-04
ZHIDOU ELECTRIC VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is that there is a problem that the temperature of the battery changes too much and cannot be alarmed in time, and a method for alarming the battery voltage drop rate is provided

Method used

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Embodiment

[0035] A battery temperature rise rate alarm method is applicable to the battery of an electric vehicle equipped with a BMS. The electric vehicle communicates with the background through a wireless network, comprising the following steps:

[0036] Step 1: BMS starts to detect the heating rate;

[0037] Step 2: BMS starts timing, timing time t=0, and at the same time, record the current temperature values ​​T of all monomers;

[0038] Step 3: start timing;

[0039] Step 4: When t ≥ the set interval, record the temperature values ​​T' of all monomers at this time; the default value of the set interval is 6 seconds.

[0040] Step five: Calculate T-T' according to the current temperature value, if T-T'≥ the calibration temperature value, then perform step six, if T-T'

[0041] Step 6: The BMS reports that the temperature rise rate is too fast and alarms, an...

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Abstract

The invention discloses a battery temperature rise rate alarm method. The defects of the prior art are solved. The method comprises the following steps: S1, a BMS (Battery Management System) starts detecting the rate of temperature rise; S2, the BMS starts timing (the timing time t=0), and records the current temperature values T of all single batteries; S3, timing starts; S4, when t is greater than or equal to a set interval length, the temperature values T' of all the single batteries at the time are recorded; S5, T-T' is calculated according to the current temperature values, S6 is performed if T-T' is greater than or equal to a calibrated temperature value, and S2 is performed if T-T' is smaller than the calibrated temperature value; S6, the BMS raises the alarm to remind that the temperature rises too fast, and performs a safety protection action; S8, an electric vehicle sends an alarm signal indicating that the temperature rises too fast to the background through a wireless network; S8, the background sends the alarm signal to users and after-sales personnel; and S9, the BMS ends detection.

Description

technical field [0001] The invention relates to the technical field of electric vehicle battery protection, in particular to a battery heating rate alarm method. Background technique [0002] At present, the battery packs in electric vehicles are equipped with a battery protection system, but the protection system only has basic protection functions such as overcharging, over-discharging, short circuit, and over-current for the battery pack. In addition to overcharge, overdischarge, short circuit, and overcurrent, many other abnormalities often occur, such as water ingress in the battery pack, bulging of the single battery, severe heating of the single battery, and many other safety issues. The protection system currently used Basically, there is no protection related to the above-mentioned battery safety issues. [0003] Chinese Patent Publication No. CN101207276, published on June 25, 2008, the name of the invention is a series lithium battery protection system, the appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/367G01R31/382G01R31/396
Inventor 王红梅鲍文光魏代祥闫优胜樊晓浒何志刚
Owner ZHIDOU ELECTRIC VEHICLE CO LTD
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