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Temperature control method for an electrochemical energy store in a vehicle

A technology of temperature regulation and accumulator, which is applied in electrochemical generators, vehicle energy storage, vehicle components, etc., can solve the problems of increased wear and tear of cooling components, and achieve the effects of reduced frequency, high operating temperature, and long service life

Active Publication Date: 2013-09-25
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The charging and discharging efficiency of the accumulator is therefore not used as well as possible according to the state of the art
In addition, increased wear of cooling components occurs

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0024] Preferred embodiments of the present invention are described below. Further details, preferred embodiments and refinements of the invention result from this.

[0025] In a two-point regulator for cooling electrochemical energy stores with lithium-ion batteries, the time-dependent actual temperature of the battery cells measured with a temperature sensor is used as a control variable and as an observation variable. The temperature is referred to here as T ist (t). This is a measurement of a representative cell of the entire energy store at a location in the vicinity of the cell terminals. The desired temperature at the measurement site is achieved by cooling in a cooling cycle using vapor refrigerant and a refrigerant compressor at (here referred to as T oG The) upper temperature case is activated, and at (herein referred to as T uG ) is deactivated at lower temperature conditions. Furthermore, the time-dependent voltage of the accumulator (here referred to as U(t))...

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Abstract

The invention relates to a temperature control method for an electrochemical energy store in a vehicle, wherein the electrochemical energy store has a cooling device for the purpose of cooling thereof, and wherein an actual temperature value of the electrochemical energy store is determined by a temperature measuring means and a target temperature value of the electrochemical energy store is set by a two-point control device which activates the cooling device at an upper temperature limit of the electrochemical energy store and deactivates the cooling device at a lower temperature limit of the electrochemical energy store, wherein the upper temperature limit of the two-point control device and / or the lower temperature limit of the two-point control device is determined during the operation of the electrochemical energy store, or during the activation of the cooling device,; in a time-dependent manner, and wherein the upper temperature limit of the two-point control device and / or the lower temperature limit of the two-point control device is established depending on energy store data and / or vehicle operating data.

Description

technical field [0001] The invention relates to a method for temperature regulation of an electrochemical energy store in a vehicle, wherein the electrochemical energy store has a cooling device for its cooling purpose and wherein the electrochemical energy store is determined using a temperature measuring device The actual value of the temperature of the accumulator and the desired value of the temperature of the electrochemical accumulator are set by means of a two-point regulator, which activates the cooling device in the case of an upper temperature limit of the electrochemical accumulator and The cooling device is deactivated in case of lower temperature limit of the energy converter. Background technique [0002] Electrochemical energy stores are becoming more and more interesting in the process of the continuous electrification of drives for vehicles for passenger and freight transport. In particular, secondary energy stores in the high-voltage range based on lithium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/48H01M10/50
CPCH01M10/0525H01M10/486H01M10/625H01M10/633H01M10/613B60L58/26Y02E60/10Y02T10/70
Inventor M·弗莱肯施泰因T·霍夫勒A·维尔德O·波伦D·库恩
Owner BAYERISCHE MOTOREN WERKE AG
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