Charging device and method with adjustable output current in constant current charging stage

A technology of constant current charging stage and output current, applied in battery circuit devices, circuit devices, secondary battery charging/discharging, etc., can solve the problems of high charging cost, low charging efficiency, and non-adjustable current, so as to reduce charging cost. Effect

Inactive Publication Date: 2012-08-01
BEIJING WUZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The embodiment of the present invention provides a charging device and method with adjustable output current in the constant current source charging stage, which is used to solve the problem that the curre

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  • Charging device and method with adjustable output current in constant current charging stage
  • Charging device and method with adjustable output current in constant current charging stage
  • Charging device and method with adjustable output current in constant current charging stage

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Embodiment Construction

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0042] like image 3 A structural diagram of a charging device with adjustable output current in the constant current charging stage provided by an embodiment of the present invention.

[0043]It includes a charging driving part 301 , a current sampling unit 302 and a control unit 303 .

[0044] The charging driving part 301 charges the battery.

[0045] The current sampling unit 302 samples the charging output current, and converts the sampled current value into a voltage signal.

[0046] The control unit 303 outputs a set voltage, and the set ...

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Abstract

The invention relates to the technical field of charging and in particular relates to a charging device and method with adjustable output current in a constant current charging stage. The device comprises a charging driving part which is used for charging a battery, a current sampling unit which is used for sampling a charging output current and converting the current into a feedback voltage signal and a control unit which is used for outputting a set voltage, wherein the set voltage and the voltage output by the current sampling unit are merged into a feedback voltage of current and the feedback voltage is fed back to the charging driving part. By adopting the embodiment of the invention, different quantities of batteries connected in series can be charged, the charging cost is reduced, and an appropriate constant current stage charging current is set according to batteries in different capacities, thus the charging device and method provided by the invention can meet requirements of multiple charging batteries; meanwhile, the current can be regulated in a constant current charging process, thus the charging process can adapt to battery states such as the state that temperature of the battery is changed.

Description

technical field [0001] The invention relates to the technical field of charging, in particular to a charging device and method with adjustable output current in a constant current charging stage. Background technique [0002] The maximum charging voltage that the integrated charging management chip of the existing rechargeable battery can achieve is limited. Taking the integrated charging chip of the lithium-ion battery as an example, the existing integrated lithium-ion charging chip can charge up to 6 series batteries, and the maximum output voltage of the battery is is 25.2V. However, in many industrial applications, the output voltage of the battery is required to reach 36V, so the integrated charging chip cannot meet this kind of demand. [0003] Taking a lithium-ion rechargeable battery as an example, the charging process in the constant current and constant voltage charging method is: first charge at a constant current, and then switch to constant voltage charging whe...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/44
CPCY02E60/12Y02E70/40Y02E60/10
Inventor 郭键朱杰刘军阎芳
Owner BEIJING WUZI UNIVERSITY
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