Battery Heating Control Circuit for Low-Temperature Charging
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Solution Overview
Problem
Power batteries face significant capacity limitations and inability to charge in low temperature environments, necessitating effective heating solutions to ensure normal operation.
Innovation Solution
A battery heating apparatus and control method that utilizes a voltage transformation module with switch modules and energy storage elements to form loops for discharging and charging, generating high-frequency pulse currents for efficient heating, with two heating modes to adapt to different battery types and states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional heating methods are used for power batteries in low temperature environments, then the battery temperature can be raised, but the discharge capacity seriously declines and the battery cannot be charged
Solution Approach 1:
The patent employs periodic charging and discharging cycles through the voltage transformation module to generate internal heat within the battery. By alternately charging and discharging the battery at controlled frequencies, thermal energy is generated internally without external heating devices, raising the battery temperature while maintaining its chemical stability and charging capability in low temperature environments.
Solution Approach 2:
The battery heats itself through internal electrochemical reactions during the periodic charging and discharging process. The voltage transformation module facilitates this self-heating by controlling the charge-discharge cycles, eliminating the need for separate external heating systems and avoiding the capacity degradation associated with traditional heating methods.
2Temperature
If external heating devices are added to heat power batteries, then the battery can operate in low temperature environments, but the device complexity increases
Solution Approach 1:
The voltage transformation module serves multiple functions: it transforms voltage for battery charging/discharging and simultaneously generates internal heat through controlled periodic operations. This multi-functionality eliminates the need for separate external heating devices, reducing system complexity while maintaining the ability to operate power batteries in low temperature environments.
Solution Approach 2:
The battery system heats itself through internal electrochemical reactions during voltage transformation operations, eliminating the need for external heating devices. This self-heating mechanism simplifies the overall system structure by removing separate heating components while ensuring the battery can operate in low temperature conditions.
3Device complexity
If the inductance of the coil in the voltage transformation circuit is insufficient, then the circuit design is simpler, but the heating performance is inadequate
Solution Approach 1:
The patent preliminarily determines the appropriate inductance value during the design phase to ensure sufficient heating performance. By pre-calculating and selecting the optimal inductance parameter, the circuit achieves adequate heating power without requiring complex adjustments or additional components, thus maintaining simple circuit structure while ensuring effective heating capability.
Solution Approach 2:
The patent optimizes the inductance parameter of the coil to achieve the desired heating performance. By carefully selecting and adjusting the inductance value, the system achieves sufficient heating power with a simple circuit design, avoiding the need for complex circuit configurations while meeting the heating requirements for power battery operation in low temperature environments.
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
The solution effectively heats power batteries during charging and discharging, improving heating performance by selecting optimal pulse current frequencies and reducing switch control operations, thus enabling normal battery operation in low temperatures without additional heating modules.
Implementation Method 1
the second voltage transformation circuit and the energy storage element form a loop for discharging from the power battery to the energy storage element and a loop for charging the power battery by the energy storage element, for heating the power battery during discharging and charging
Implementation Method 2
a first voltage transformation circuit, and a first switch module connected to the first voltage transformation circuit, the first voltage transformation circuit being configured to connect a charging apparatus; and a second voltage transformation circuit
Data Source
AI summary
A battery heating apparatus includes a voltage transformation module and a control module. The voltage transformation module includes a first voltage transformation circuit configured to connect a charging apparatus, a first switch module connected to the first voltage transformation circuit, a second voltage transformation circuit configured to connect a power battery, and an energy storage element and a second switch module connected to the second voltage transformation circuit. The control module is configured to, in a first heating mode, control the first switch module to turn off the first voltage transformation circuit, and control the second switch module so that the second voltage transformation circuit and the energy storage element form a loop for discharging from the power battery to the energy storage element and a loop for charging the power battery by the energy storage element, for heating the power battery during discharging and charging.


