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Battery energy balancing circuit

A technology for balancing circuit and battery energy, applied in battery circuit devices, circuit devices, current collectors, etc., can solve problems such as energy conduction loss, battery energy consumption, switching loss, etc.

Active Publication Date: 2012-08-29
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-efficiency zero-current switch using switched capacitor resonance for the above-mentioned battery energy balance circuit in the prior art that consumes battery energy and causes energy conduction loss or switching loss. Non-consumable battery energy balancing circuit

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] exist figure 1 In the schematic diagram of the circuit structure of the first preferred embodiment of the battery energy balance circuit of the present invention shown, the battery energy balance circuit includes a first battery pack and a second battery pack sequentially output in series, the first battery pack includes a first The battery 27, the first switch tube 29, the second switch tube 30, the first diode 31 corresponding to the first switch tube 29 and the second diode 32 corresponding to the second switch tube 30; The second battery pack includes a second battery 28, a third switch...

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Abstract

The invention relates to a battery energy balancing circuit. The battery energy balancing circuit comprises a first battery pack and a second battery pack which are sequentially connected in series for output, wherein each battery pack comprises a battery, two switch tubes and two diodes. The battery energy balancing circuit further comprises a controller and a resonant impedance. The batteries conduct periodic energy transfer through the battery energy balancing circuit. The controller is connected with the first switch tube to transfer energy of the first battery to the resonant impedance, connected with the second switch tube to transfer energy of the resonant impedance to the second battery, connected with the fourth switch tube to transfer energy of the second battery to the resonant impedance, and connected with the third switch tube to transfer energy of the resonant impedance to the first battery. The battery energy balancing circuit adopts the series resonance of the switching capacitance and the resonant inductance to achieve zero-current switching on / off of the switch tubes, has high efficiency and can not cause large energy conduction loss or switching loss during energy transfer.

Description

technical field [0001] The invention relates to the application field of battery circuits, and more specifically relates to a battery energy balance circuit that uses switched capacitor resonance to realize zero-current switching. Background technique [0002] With the development of society, rechargeable batteries such as lead-acid batteries and lithium batteries are widely used in the fields of portable equipment, industry, and electric and hybrid vehicles. The voltage range of a lithium battery is roughly 3V to 4.3V. In order to obtain a higher voltage, it is generally realized by connecting multiple lithium batteries in series to form a battery pack. Therefore, in the energy storage device of the battery pack connected in series, the battery energy balance is a key factor for assessing the quality of the battery pack. [0003] Among the battery energy balancing methods, the simplest and most direct method is to discharge the battery through a discharge resistor. The di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 杨耀斌郑家伟蔡伟锋林振远
Owner THE HONG KONG POLYTECHNIC UNIV
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