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Method, device and system for battery internal temperature estimation and vehicle utilizing method, device and system

An internal temperature and battery technology, applied in thermometers, battery/fuel cell control devices, thermometer applications, etc., can solve the problems of inability to guarantee system reliability, inaccurate battery internal temperature measurement, and high cost

Inactive Publication Date: 2019-05-24
CH AUTO TECH CORP CO LTD
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  • Claims
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Problems solved by technology

[0004] The purpose of the present disclosure is to provide a battery internal temperature estimation method, device, system and vehicle to solve the problems of inaccurate battery internal temperature measurement, high cost, and inability to guarantee system reliability in the related art

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  • Method, device and system for battery internal temperature estimation and vehicle utilizing method, device and system
  • Method, device and system for battery internal temperature estimation and vehicle utilizing method, device and system

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Embodiment Construction

[0053] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0054] As described in the background art, in the related art, either the surface temperature of the battery measured by a temperature sensor is used as the internal temperature of the battery, or the temperature sensor is installed inside the battery to measure the internal temperature of the battery. The accuracy of the internal temperature of the battery obtained by the first method is poor, and the detection cost of the second method is high and system reliability cannot be guaranteed. In order to solve this problem, the inventor changed the research and development ideas in the research and development, established a thermoelectric model of the battery b...

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Abstract

The invention relates to a method, a device and a system for battery internal temperature estimation and a vehicle utilizing the method, the device and the system, aiming to solve the problems of pooraccuracy and high cost in battery internal temperature measurement and incapability of guaranteeing system reliability, in the prior art. The method includes acquiring terminal voltage and terminal current of a battery, battery coolant outlet temperature and battery surface temperature at the current time, estimating currently open-circuit voltage, determining currently heat production rate of the battery according to the open-circuit voltage, the currently terminal voltage and current of the battery, and estimating currently internal temperature of the battery according to the heat production rate, the battery coolant outlet temperature, the battery surface temperature, the internal temperature of the battery at the first time, and a thermal electrical model of the battery.

Description

technical field [0001] The present disclosure relates to the field of vehicle batteries, in particular, to a battery internal temperature estimation method, device, system and vehicle. Background technique [0002] With the deepening of the global energy crisis, the increasing harm of air pollution and global temperature rise, and the increasing demand for improving vehicle fuel economy and reducing vehicle emissions, electric vehicles have developed rapidly. Lithium-ion has replaced nickel-metal hydride batteries as the power source of electric vehicles (EV), hybrid electric vehicles (HEV) and plug-in hybrid electric vehicles (PHEV). Temperature directly affects the energy, power, and life performance of lithium-ion batteries. Some materials in lithium-ion batteries have low thermal stability. When the operating temperature is higher than the allowable temperature value, the battery will become thermally unstable, and charging at low temperature may cause internal lithium p...

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Application Information

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IPC IPC(8): G01K13/00G01R31/367G01R31/389H01M10/42H01M10/48B60L58/10
CPCY02T10/70Y02E60/10
Inventor 陆群周帅
Owner CH AUTO TECH CORP CO LTD
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