Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
OVERCHARGE PROTECTION CIRCUIT AND OVERDISCHARGE PROTECTION CIRCUIT FOR POWER BATTERY
Document Type and Number:
WIPO Patent Application WO/2018/099357
Kind Code:
A1
Abstract:
An overcharge protection circuit and an overdischarge protection circuit for a power battery. The overcharge protection circuit comprises: a first voltage measurement circuit (10), the first voltage measurement circuit being connected to a power battery and used for measuring a voltage of the power battery and outputting an overcharge protection signal when the voltage of the power battery is greater than a first reference voltage; a first latching circuit (20), the first latching circuit being connected to the first voltage measurement circuit and a charge control loop (200) respectively and used for controlling the charge control loop to be in a disconnected state after receiving the overcharge protection signal, thereby effectively preventing the power battery from being overcharged and avoiding, in the case that the power battery is fully charged and there is no current, the risk of overcharge reoccurrence after the voltage of the power battery decreases to the first reference voltage.

Inventors:
XIE ZHEFENG (CN)
CHEN WU (CN)
JIANG BUHONG (CN)
Application Number:
PCT/CN2017/113294
Publication Date:
June 07, 2018
Filing Date:
November 28, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
BYD CO LTD (CN)
International Classes:
H02H7/18
Foreign References:
CN206432703U2017-08-22
CN105978064A2016-09-28
CN201134695Y2008-10-15
CN205429705U2016-08-03
JP2002199594A2002-07-12
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
Download PDF: