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公开(公告)号：US20190305384A1
公开(公告)日：2019-10-03
申请号：US16447600
申请日：2019-06-20
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Bingxiao LIU , Rui YANG , Xiaokang LIU
IPC: H01M10/48 , G01R31/3842 , G01R31/396 , G01R31/36
Abstract: A battery micro-short circuit detection method and apparatus are disclosed. The method includes: obtaining a target initial battery parameter value of a target battery at an initial moment, and determining a reference initial battery parameter value of a virtual reference battery at the initial moment, where a response of the virtual reference battery is the same as a response of the target battery when a same excitation condition is given; obtaining a target battery parameter value of the target battery at a specified moment; determining a reference battery parameter value of the virtual reference battery at the specified moment based on the target battery parameter value and the reference initial battery parameter; and calculating a difference between the target battery parameter value and the reference battery parameter value, and determining, based on the difference, that the target battery is micro-short-circuited.
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公开(公告)号：US20190319463A1
公开(公告)日：2019-10-17
申请号：US16456157
申请日：2019-06-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Rui YANG , Chengbin MA , Xiaokang LIU
Abstract: Embodiments of the present invention relate to the battery field, and provide an energy balancing circuit and an energy balancing apparatus, so that a balancing capability of a circuit can be improved while a loss of the circuit is kept stable. The energy balancing circuit includes a coupling branch and a receiving branch. The coupling branch includes one sending coil and at least one receiving coil. Each receiving coil is coupled to the sending coil in an electromagnetic induction manner. The receiving branch includes at least one receiving subbranch. Each receiving coil is uniquely connected to one receiving subbranch. Each receiving subbranch includes a rectifier branch. A first receiving subbranch in the at least one receiving subbranch further includes a first boost branch connected to both a first rectifier branch and a first receiving coil. The first receiving coil is a receiving coil connected to the first receiving subbranch.
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公开(公告)号：US20180123356A1
公开(公告)日：2018-05-03
申请号：US15858210
申请日：2017-12-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Rui YANG , Xiaokang LIU , Zhiwei WU
CPC classification number: H02J7/0014 , B60L58/22 , H01M2/1016 , H01M10/4207 , H01M10/441 , H01M2010/4271 , H02J7/0019 , H02J7/022 , H02J2007/005 , H02J2007/0095 , Y02T10/7055
Abstract: An energy balancing apparatus and method, and a terminal are provided in the battery field. The apparatus may include a controlled alternating current energy supply, an alternating current energy distribution circuit, filter circuits, rectifier circuits, and a balance control circuit. The controlled alternating current energy supply and an input port of the alternating current energy distribution circuit are connected in parallel, each output port of the alternating current energy distribution circuit and an input side of a corresponding filter circuit are connected in parallel, an output side of each filter circuit and an alternating current side of a corresponding rectifier circuit are connected in parallel, a direct current side of each rectifier circuit and a corresponding battery cell are connected in parallel, each battery cell is connected to the balance control circuit, and the balance control circuit is connected to the controlled alternating current energy supply.
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公开(公告)号：US20180226809A1
公开(公告)日：2018-08-09
申请号：US15948833
申请日：2018-04-09
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Rui YANG , Xiaokang LIU , Zhiwei WU
CPC classification number: H02J7/0014 , H01M2/1016 , H02J7/0018 , H02J7/007 , H02M3/33507
Abstract: An equalization current adjustment method includes: determining a battery unit to be equalized in a battery pack, and obtaining a current actual equalization current value of the battery unit; and when it is determined that a difference between the current actual equalization current value of the battery unit and a target equalization current value does not fall within a range of a preset threshold, adjusting a fundamental amplitude of an alternating current power supply of a target circuit on which the battery unit is located and/or a voltage gain of the target circuit, so that the difference between the current actual equalization current value of the battery unit and the target equalization current value falls within the range of the preset threshold.
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