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Charging control circuit on high-voltage battery pack by low-voltage power supply based on battery pack H-bridge series structure, and control method thereof

A charging control, low-voltage power supply technology, applied in battery circuit devices, charge balancing circuits, arrangement of multiple synchronous batteries, etc., can solve the problems of high application cost, complex circuit, large hardware volume, etc., to provide reliability and safety. The effect of high stability, simple circuit and low cost

Pending Publication Date: 2018-09-28
李勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Both the current passive equalization and active equalization technologies have problems such as low efficiency and unsatisfactory practical application effects.
Especially the active equalization technology, including the capacitor fit method and the voltage conversion method, has defects such as extremely complex circuits, large hardware volume, and high application costs.

Method used

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  • Charging control circuit on high-voltage battery pack by low-voltage power supply based on battery pack H-bridge series structure, and control method thereof
  • Charging control circuit on high-voltage battery pack by low-voltage power supply based on battery pack H-bridge series structure, and control method thereof
  • Charging control circuit on high-voltage battery pack by low-voltage power supply based on battery pack H-bridge series structure, and control method thereof

Examples

Experimental program
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Effect test

Embodiment Construction

[0030] The low-voltage power supply to the high-voltage battery pack charging control circuit based on the battery pack H-bridge series structure is a battery pack H-bridge series structure, and the low-voltage power supply with battery protection and active equalization functions charges the high-voltage battery pack. Control circuit. The circuit design is compatible with the forward or reverse connection of the charging voltage. According to the voltage value of the low-voltage power supply, a number of single cells (or single battery packs) can be dynamically selected in series to join the charging circuit, so that the low-voltage power supply can charge the high-voltage battery pack. For the single battery (or single battery pack) that is not connected to the series busbar, it can realize the same active equalization capability as the charging current. Through dynamic control, each single cell (or single battery pack) in the battery pack can be fully charged.

[0031] Such...

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Abstract

The invention discloses a charging control circuit on a high-voltage battery pack by a low-voltage power supply based on a battery pack H-bridge series structure. The existing operation of directly connecting the monomer batteries (or monomer battery pack) in series to form the battery pack is changed, the on-off control is performed through a field effect tube, a relay or a H-bridge circuit constructed by other switch devices, the H-bridge output end is connected with the battery pack series bus. The monomer battery (or monomer battery pack) is serial in the bus, and the bus acquires the battery pack voltage. And the bus can be short-circuited through the H-bridge circuit, so that this-level monomer battery (or monomer battery pack) can bypass the serial combination.

Description

technical field [0001] The invention relates to the field of batteries. Background technique [0002] The rapid development of new energy technologies, especially the widespread application of lithium batteries in backup energy storage and electric vehicles, puts forward higher requirements for key battery energy storage and battery management technologies, and it is necessary to improve the effectiveness and balance of battery pack charging , so that the energy storage characteristics of the battery pack can be maximized. In particular, the use of high-voltage battery packs needs to effectively solve the problem of safety in the use of high-voltage charging. At the same time, it is necessary to reduce the hardware cost of high-voltage charging equipment, so that new energy battery technology can be more widely promoted and applied. [0003] The battery pack technology has high requirements on the consistency of single cells, otherwise the battery consistency will seriousl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0013H02J7/0014H02J7/0016H02J7/0019
Inventor 李勇
Owner 李勇
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