US 2022/0285950 A1Published application

Energy storage system and battery management method

OwnerHualei JU, Lin LI +1inventors

InventorsHualei JU, Lin LI, Haibin GUO

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Abstract

An energy storage system includes a battery cluster, a battery control system, at least two first power conversion modules, a bus, and a second power conversion module. A plurality of battery packs in the battery cluster are connected in parallel to the bus through the at least two first power conversion modules, one end of the second power conversion module is connected in parallel to the battery cluster, and the other end of the second power conversion module is connected to a load or a power grid. The battery control system obtains a target current value that needs to be provided by the second power conversion module to the load or the power grid. In this application, the battery parameters of the battery packs can be equalized, or the battery cluster is enabled to output the target power, so that system stability is improved.

Claims20

Dependent claims

An energy storage system, wherein the energy storage system comprises a battery cluster, a battery control system, at least two first power conversion modules, a bus, and a second power conversion module, the battery cluster comprises a plurality of battery packs connected in series, the plurality of battery packs are connected in parallel to the bus through the at least two first power conversion modules, one end of the second power conversion module is connected in parallel to the battery cluster, and the other end of the second power conversion module is connected to a load or a power grid;

the battery control system is configured to obtain a target current value that needs to be provided by the second power conversion module to the load or the power grid;
and
the battery control system is further configured to:
based on the target current value and a battery parameter of each battery pack, control the battery pack to discharge to the bus through the first power conversion module connected in parallel to the battery pack, or control the first power conversion module connected in parallel to the battery pack to charge the battery pack, to equalize the battery parameters of the battery packs or enable the battery cluster to output target power.

1 more element

A battery management method, wherein the method is applicable to an energy storage system, the energy storage system comprises a battery cluster, a battery control system, at least two first power conversion modules, a bus, and a second power conversion module, the battery cluster comprises a plurality of battery packs connected in series, the plurality of battery packs are connected in parallel to the bus through the at least two first power conversion modules, one end of the second power conversion module is connected in parallel to the battery cluster, and the other end of the second power conversion module is connected to a load or a power grid;

and
the method comprises:
obtaining, by the battery control system, a target current value that needs to be provided by the second power conversion module to the load or the power grid;
and
based on the target current value and a battery parameter of each battery pack, controlling, by the battery control system, the battery pack to discharge to the bus through the first power conversion module connected in parallel to the battery pack, or controlling the first power conversion module connected in parallel to the battery pack to charge the battery pack, to equalize the battery parameters of the battery packs or enable the battery cluster to output target power.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/687,335Filed 4 Mar 2022
Priority: CN 202110239117.54 Mar 2021
Published: 8 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H02J 7/52
Acting upon multiple batteries simultaneously or sequentially: for charge balancing, e.g. equalisation of charge between batteries
H02J 7/82
Including monitoring or indicating arrangements: control of state of charge [SOC]
H02J 7/933
Regulation of charging or discharging current or voltage: the cycle being controlled or terminated in response to electric parameters
H02J 3/32
Arrangements for balancing of the load in networks by storage of energy: using batteries or super capacitors with converting means

Family

No related US applications are recorded in the indexed filing history.

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