Battery Heating Circuit Using Resonant Charge Storage

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Solution Overview

Problem

Batteries experience decreased capacity and increased resistance and polarization under low temperature conditions, affecting their charge/discharge performance in electric vehicles and electronic devices.

Innovation Solution

A battery heating circuit comprising switch units, a switching control module, a damping component, an energy storage circuit, and a polarity inversion unit, which controls energy flow between the battery and energy storage circuit to maintain optimal performance by heating the battery and inverting voltage polarities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the battery operates under low temperature conditions, then the battery can function in harsh environments, but the resistance and polarization of the battery increase, reducing capacity

Engineering Contradiction:

Improvelow temperature adaptabilityVSAvoidbattery capacity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The heating circuit is activated before the battery is discharged or charged under low temperature conditions. The circuit pre-heats the battery by controlling switches to create current paths that generate heat through the battery's internal resistance, raising the battery temperature to an optimal range before normal operation begins, thus preventing capacity loss due to cold temperatures

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The heating circuit operates periodically by controlling the switches to turn on and off in sequence. The control module activates heating phases intermittently during battery operation, maintaining the battery temperature within an optimal range without continuous heating, thereby balancing heat generation with energy consumption and preventing capacity degradation

Inventive Principle:

Principle #19Periodic action

2Adaptability or versatility

If the battery operates under low temperature conditions, then the battery can function in harsh environments, but the charge/discharge performance deteriorates

Engineering Contradiction:

Improvelow temperature adaptabilityVSAvoidcharge/discharge performance

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The heating circuit is activated before the battery undergoes charge or discharge operations in low temperature environments. By pre-heating the battery through controlled current flow paths, the battery reaches optimal operating temperature before charging or discharging begins, ensuring high charge/discharge performance without the negative effects of cold temperatures

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The heating circuit changes the temperature parameter of the battery from a low temperature state to an optimal temperature range. By controlling the switches and current paths, the system adjusts the battery's thermal state, transforming it from a condition that would cause poor charge/discharge performance to one that enables high productivity

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If the battery resistance increases under low temperature conditions, then the battery can operate in cold environments, but the capacity is reduced

Engineering Contradiction:

Improvecold environment operationVSAvoidbattery capacity

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The heating circuit is activated before the battery is put into service in cold environments. By pre-heating the battery through controlled current flow, the battery's internal resistance is reduced to normal levels before discharge or charge operations begin, ensuring that the full capacity of the battery can be utilized without the capacity reduction that would otherwise occur due to cold-temperature resistance increases

Inventive Principle:

Principle #10Preliminary action

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

Improves battery charge/discharge performance and safety by maintaining capacity and efficiency under low temperature conditions, reducing the risk of failures and short circuits through series-connected charge storage components and polarity inversion.

Implementation Method 1

the energy flows back-and-forth between the battery and the energy storage circuit when the switch units switch on

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

a damping component R1

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS9120394B2Battery heating circuits and methods based on battery discharging and charging using resonance components in series and multiple charge storage components

Publication Date: 2015.09.01 BYD SEMICON CO LTD

AI summary

Certain embodiments of the present invention provide a battery heating circuit, comprising a plurality of switch units 1, a switching control module 100, a damping component R1, an energy storage circuit, and a polarity inversion unit 101, wherein: the energy storage circuit is connected with the battery, and comprises a current storage component L1 and a plurality of charge storage components C1; the plurality of charge storage components C1 are connected with the plurality of switch units 1 in series in one-to-one correspondence to form a plurality of branches; the plurality of branches is connected in parallel with each other and then connected with the current storage component L1 and damping component R1 in series; the switching control module 100 is connected with the switch units 1, and is configured to control ON/OFF of the switch units 1.