Battery Temperature Control via Internal Power Flow

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Solution Overview

Problem

Existing battery temperature control methods, such as using heaters, increase system volume and weight and consume power, which can degrade battery performance and efficiency in applications like electric vehicles.

Innovation Solution

A method that determines state difference information among batteries and calculates output values for converters to control charging and discharging processes, generating power flows that increase battery temperature without consuming battery power, by classifying batteries into groups and altering operation modes based on temperature thresholds and requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a heater is connected to the battery to control temperature, then the battery temperature can be maintained, but the system volume and weight increase

Engineering Contradiction:
Improvebattery temperatureVSAvoidsystem weight
Core Design Contradiction:
TemperatureVSWeight of stationary object

Solution Approach 1:

The battery system uses its own internal energy through controlled charging and discharging processes to generate heat and maintain temperature, rather than relying on external heaters. The converter facilitates power flow between batteries, enabling one battery to charge another, which generates heat internally and raises the temperature of cold batteries without requiring separate heating devices.

Inventive Principle:
Principle #25Self-service

2Temperature

If a heater is connected to the battery to control temperature, then the battery temperature can be maintained, but the system volume increases

Engineering Contradiction:
Improvebattery temperatureVSAvoidsystem volume
Core Design Contradiction:
TemperatureVSVolume of stationary object

Solution Approach 1:

The converter, originally designed for power management and charging/discharging control, is utilized for dual purposes: both energy management and temperature control. By controlling the power flow direction and magnitude, the system can generate heat within the batteries themselves, making the power management device serve multiple functions and eliminating the need for separate heating equipment.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Temperature

If power is supplied to a heater to control battery temperature, then the battery temperature can be maintained, but power is consumed

Engineering Contradiction:
Improvebattery temperatureVSAvoidpower consumption
Core Design Contradiction:
TemperatureVSUse of energy by moving object

Solution Approach 1:

The system converts the normally wasteful energy dissipation that occurs during charging and discharging processes into useful heat for temperature maintenance. By controlling the converter to enable controlled charging and discharging, the energy that would otherwise be lost as heat is harnessed to warm cold batteries, transforming a potential inefficiency into a beneficial heating mechanism.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

4Temperature

If power is supplied to a heater to control battery temperature, then the battery temperature can be maintained, but battery performance degrades due to power consumption

Engineering Contradiction:
Improvebattery temperatureVSAvoidbattery performance
Core Design Contradiction:
TemperatureVSReliability

Solution Approach 1:

The battery system maintains its own temperature using its own internal energy resources through controlled charging and discharging, rather than consuming power from the battery to operate external heating devices. This self-service approach ensures that temperature control does not compromise battery performance or available power for other system functions.

Inventive Principle:
Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach effectively raises battery temperatures without power consumption, improving performance and efficiency while reducing system weight and power usage, and equalizes state information among batteries.

Implementation Method 1

controlling a charging and discharging process of the batteries to generate a power flow

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS11186197B2Method of controlling temperature of battery, and battery management apparatus and system
Publication Date: 2021.11.30 SAMSUNG ELECTRONICS CO LTD
  • US11186197B2 patent drawing
  • US11186197B2 patent drawing
  • US11186197B2 patent drawing

AI summary

A method to control a battery temperature includes: determining state difference information of a first battery, among batteries, based on state information of the first battery and average state information of the batteries; calculating a first output value of a first converter corresponding to the first battery based on the determined state difference information; and controlling a charging and discharging process of the batteries to cause the first converter to generate a power flow based on the calculated first output value.