Closed-loop control method for battery full-range charging

A closed-loop control, battery technology, applied in battery circuit devices, control/regulation systems, current collectors, etc., can solve problems such as hidden safety hazards, high overall performance requirements of batteries and systems, and achieve stability, improve resource utilization, reduce The effect of the requirement of the maximum charging power margin

Active Publication Date: 2016-08-03
深圳市奥特迅软件有限公司
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  • Abstract
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Problems solved by technology

[0003] The traditional battery charging method is constant current charging and then constant voltage charging. Since the transition point switching between constant current and constant voltage will generate a large peak charging power, the overall performance requirements of the battery and the system are high, and there are potential safety hazards

Method used

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  • Closed-loop control method for battery full-range charging
  • Closed-loop control method for battery full-range charging
  • Closed-loop control method for battery full-range charging

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Embodiment Construction

[0039] The present invention is described in further detail below in conjunction with accompanying drawing:

[0040] figure 1 Middle I L1 , I L2 Respectively, the effective value of the fundamental current of the primary coil and the secondary coil, U 1 , U 2 Respectively, the effective value of the AC output fundamental voltage of the inverter and the fundamental effective value of the midpoint voltage of the rectifier, V 1 , I 1 are the DC input voltage and DC input current of the wireless power transfer system, V 2 , I 2 are the DC output voltage and DC output current of the wireless power transfer system, V BT , I BT are the terminal voltage and charging current of the battery, respectively.

[0041] V in Figure 3 oref , I oref ,P oref are the charging voltage reference value, charging current reference value and charging power reference value of the battery respectively, V odc , I odc ,P odc are the actual value of the charging voltage, the actual value of ...

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Abstract

The invention discloses a closed-loop control method for battery full-range charging. The method is based on an open-loop circuit of a wireless power transmission system. The open-loop circuit of the wireless power transmission system comprises a direct-current power supply, an inverter, a primary-secondary resonant network, and a rectifier, wherein the direct-current power supply, the inverter, the primary-secondary resonant network, the rectifier and a battery are connected in sequence. The method comprises the following steps: which stage the battery is in is judged, wherein the charging stages of the battery include a constant-current charging stage, a constant-power charging stage, and a constant-voltage charging stage; when the battery is in the constant-current charging stage, the inverter is controlled in a fixed-frequency phase shift control method; when the battery is in the constant-power charging stage, the inverter is controlled in the fixed-frequency phase shift control method; and when the battery is in the constant-voltage charging stage, the inverter is controlled in a frequency-hopping phase shift control method. Through the method, full-range efficient battery charging is realized. The system is of high safety and stability.

Description

technical field [0001] The invention relates to a closed-loop control method, in particular to a closed-loop control method for full-range charging of storage batteries. Background technique [0002] Wireless transmission is a safe and convenient power transmission method, which has the advantages of flexible and convenient use, less maintenance, adaptability to harsh environments, and easy to realize unmanned automatic power supply and mobile power supply. Magnetically coupled resonant wireless power transmission technology satisfies the requirements of distance, efficiency, power and safety, and has broad application prospects in the fields of electric vehicles, consumer electronics, sensors and implanted devices. In actual use, due to random changes in factors such as primary and secondary side transmission distances, coupling coefficients, and equivalent load impedances, there is often no clear and effective control strategy for battery charging, which will reduce system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02H02J50/12H02M3/335
CPCH02J7/025H02M3/335
Inventor 王跃蒋勇斌刘军文刘铭宁改娣
Owner 深圳市奥特迅软件有限公司
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