Title:
UNINTERRUPTED POWER SUPPLY AND BATTERY PACK BUCK-BOOST CIRCUIT THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/115033
Kind Code:
A1
Abstract:
An uninterrupted power supply (UPS) and a battery pack buck-boost circuit thereof, in the battery pack buck-boost circuit, cathode (Bat+) of the battery pack is respectively connected to a first switch unit (S1) and a third switch unit (S3) through a cathode inductor (L1); anode (Bat-) of the battery pack is respectively connected to a second switch unit (S2) and a fourth switch unit (S4) through an anode inductor (L2); the other end of the first switch unit (S1) is respectively connected to the other end of the second switch unit (S2) and a fifth switch unit (S5); the other end of the third switch unit (S3) is connected to a first capacitor (C1) ; the other end of the first capacitor (C1) is connected to the other end of the fifth switch unit (S5) and a second capacitor (C2), and the other end of the second capacitor (C2) is connected to the other end of the fourth switch unit (S4); the first switch unit (S1) to the fourth switch unit (S4) all comprise a controllable switch and an anti-parallel diode; and the control unit is connected to the control end of each controllable switch. The UPS and the battery pack buck-boost circuit thereof can effectively achieve the balance of positive and negative bus voltages, can avoid parallel circulation to ensure battery life, and also cancel the limitation on the number of batteries at the same time.
Inventors:
WU QINGBIN (CN)
YANG YANFEN (CN)
YANG YANFEN (CN)
Application Number:
PCT/CN2020/129026
Publication Date:
June 17, 2021
Filing Date:
November 16, 2020
Export Citation:
Assignee:
KEHUA HENGSHENG CO LTD (CN)
ZHANGZHOU KEHUA TECHNOLOGY CO LTD (CN)
ZHANGZHOU KEHUA TECHNOLOGY CO LTD (CN)
International Classes:
H02J7/00; H02M3/158; H02J9/06
Foreign References:
| CN111106750A | 2020-05-05 | |||
| CN108809094A | 2018-11-13 | |||
| CN110198116A | 2019-09-03 | |||
| CN102684469A | 2012-09-19 | |||
| CN107425709A | 2017-12-01 | |||
| JP2010004726A | 2010-01-07 |
Attorney, Agent or Firm:
HARBIN SONGHUAJIANG PATENT TRADEMARK OFFICE (CN)
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