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Power lithium-ion battery equalization circuit based on super capacitor

A technology for supercapacitors and lithium-ion batteries, which is applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of complex structure and control circuit, untimely heat dissipation, and insignificant energy-consuming balance and balance effect. Effects of improved lifetime and usable capacity, ease of control, excellent steady-state and dynamic characteristics

Inactive Publication Date: 2016-04-06
褚秀清
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  • Abstract
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Problems solved by technology

[0005] Energy-consuming equalization has problems such as unobvious equalization effect and untimely heat dissipation, while the above-mentioned active equalization strategy has complex structure and control circuits.

Method used

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  • Power lithium-ion battery equalization circuit based on super capacitor

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Embodiment Construction

[0016] Such as figure 1 As shown, it is an overall scheme diagram of a power lithium-ion battery equalization circuit based on a supercapacitor in the present invention. The figure includes an equalization unit EU, a switch matrix SM, a detection unit DU and a controller MCU; one end of the equalization unit EU is connected to the switch matrix SM2, the output end of the switch matrix SM2 is connected to the DC bus, and the other output end of the switch matrix SM2 The leads are respectively connected to the controller MCU and the switch matrix SM1; the switch matrix SM1 is connected to the main circuit of charging and discharging, and is also connected to the DC bus in parallel. The controller MCU is then connected to the detection unit DU, and finally the output terminal of the detection unit It is connected with the charging and discharging main circuit to form a closed loop.

[0017] The present invention is an energy transfer circuit based on a supercapacitor, including ...

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Abstract

The invention provides a power lithium-ion battery equalization circuit based on a super capacitor. The power lithium-ion battery equalization circuit has the characteristics of simple structure, convenience in control, rapidness and high efficiency and has excellent steady and dynamic characteristics. The power lithium-ion battery equalization circuit comprises an equalization unit EU, switch matrixes SM, a detection unit DU and a controller MCU. The structural points of the circuit are that one end of the equalization unit EU is connected to a switch matrix SM2, the output end of the switch matrix SM2 is parallelly connected to a DC bus, and the other output end of the switch matrix SM2 is connected to the controller MCU and a switch matrix SM1. The switch matrix SM1 is connected to a charging and discharging main circuit and is also connected to the DC bus in parallel. The controller MCU then is connected to the detection unit DU, and finally the output end of the detection unit is connected to the charging and discharging main circuit to form a closed loop.

Description

technical field [0001] The invention relates to a circuit for series lithium battery packs in an electric vehicle, in particular to a power lithium ion battery equalization circuit based on a supercapacitor. Background technique [0002] Polymer lithium-ion battery is a high-efficiency secondary battery successfully developed in the 20th century. Compared with traditional batteries, it has high specific energy, 3.2-3.7V higher voltage of single battery, long cycle life, large charge and discharge current, With the advantages of wide working temperature range, safety and reliability, green and pollution-free, etc., it has been widely used in electric vehicles, aviation, ships and other occasions in recent years. [0003] The voltage of a single cell of a polymer lithium-ion battery is low, and the energy storage is small, so it cannot be directly applied to an electric vehicle. In practice, most cells are combined in series and parallel. Due to the limitations of the technic...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/42
CPCY02E60/10
Inventor 褚秀清
Owner 褚秀清
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