Self-Heating Circuit for Efficient Battery Performance
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Summary
Problems
Existing battery heating methods for new energy vehicles consume excessive energy and prolong charging times due to external heating techniques, which result in high heat loss and reduced battery life when operating in low-temperature environments.
Innovation solutions
A self-heating control circuit and system that includes a control module to monitor battery pack temperatures, triggering a switch module to cut off the charging and discharging circuit when temperatures drop below a threshold, allowing an excitation module to generate current flow between battery packs, thereby inducing internal heating without external energy consumption.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If external heating apparatus is used to heat battery, then battery temperature can be raised, but energy consumption is high and charging time is prolonged
Why choose this principle:
The battery pack performs self-heating by utilizing its own internal resistance and circulating current through the battery cells. The control system activates a heating mode where current is directed through the battery pack, generating heat internally via Joule heating, eliminating the need for external heating apparatus and reducing energy loss associated with external heat transfer.
Principle concept:
If external heating apparatus is used to heat battery, then battery temperature can be raised, but energy consumption is high and charging time is prolonged
Why choose this principle:
The patent replaces the mechanical/external heating system with an electrical self-heating mechanism. Instead of using external heating apparatus that requires thermal contact and heat transfer, the system uses electrical current circulation through the battery pack to generate heat directly within the battery cells through electrical resistance.
Application Domain
Data Source
AI summary:
A self-heating control circuit and system that includes a control module to monitor battery pack temperatures, triggering a switch module to cut off the charging and discharging circuit when temperatures drop below a threshold, allowing an excitation module to generate current flow between battery packs, thereby inducing internal heating without external energy consumption.
Abstract
A self-heating control circuit includes a control module configured to obtain a cell temperature of each of two battery packs connected in parallel and send a trigger signal in response to the cell temperature being lower than a threshold. The two battery packs include a first battery pack and a second battery pack. The control circuit further includes a switch module disposed at a charging and discharging circuit of the first battery pack. A control terminal of the switch module is connected to the control module and is configured to cut off the charging and discharging circuit upon reception of the trigger signal. The control circuit also includes an excitation module configured to form a path with the two battery packs upon cut-off of the charging and discharging circuit, and generate an excitation current, so that the excitation current flows back and forth between the two battery packs.