CN115441536A - Energy storage system using retired battery and management method thereof - Google Patents
Energy storage system using retired battery and management method thereof Download PDFInfo
- Publication number
- CN115441536A CN115441536A CN202210968697.6A CN202210968697A CN115441536A CN 115441536 A CN115441536 A CN 115441536A CN 202210968697 A CN202210968697 A CN 202210968697A CN 115441536 A CN115441536 A CN 115441536A
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- China
- Prior art keywords
- retired
- batteries
- energy storage
- storage system
- battery
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0025—Sequential battery discharge in systems with a plurality of batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
Abstract
The invention provides an energy storage system utilizing retired batteries and a management method thereof. The invention has the beneficial effects that: the energy storage system utilizing the retired batteries can control whether each retired power battery participates in work or not through the relay group, sequentially controls a plurality of retired power batteries to be combined, achieves composite sharing, prolongs the service life, and meanwhile replaces the batteries in time according to the working state of the batteries without field treatment of operators, so that the stable operation of the energy storage system is ensured.
Description
Technical Field
The invention belongs to the technical field of energy storage, and particularly relates to an energy storage system using a retired battery and a management method thereof.
Background
The electric capacity of the power battery for the vehicle is continuously attenuated along with the increase of the service life, when the electric capacity is attenuated to a certain proportion, the power battery cannot be continuously used for the electric vehicle and can only be recycled as a decommissioned power battery, the decommissioned power battery is assembled into an energy storage system in the prior art and used in a scene with lower power requirement, but due to the instability of the decommissioned power battery, faults are easy to occur, the energy storage system is unstable in work and cannot normally supply power, and the maintenance cost is improved.
Disclosure of Invention
In view of the above, the present invention is directed to an energy storage system using a retired battery and a management method thereof, so as to reduce the failure rate of the energy storage system, ensure stable operation, and prolong the service life of the battery.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides an utilize energy storage system of retired battery, includes inverter PCS and battery module, inverter PCS and battery module electric connection, the battery module is including a plurality of retired power battery that establish ties in proper order, retired power battery one-to-one is connected with BMS and relay group, relay group includes the working relay who establishes ties with retired power battery and the stand-by relay who connects in parallel with retired power battery, and one of working relay and the stand-by relay in same relay group is in the closed condition, and another is in the off-state, and when working relay was in the closed condition, this retired power battery was in operating condition, and when stand-by relay was in the closed condition, this retired power battery was in the rest condition.
Furthermore, the number of the retired power batteries in the energy storage system is N + X, and according to the voltage specification requirement of the energy storage system and the voltage specification of the retired power batteries, the number of the retired power batteries in the working state at the same time is N for supplying power, and the number of the retired power batteries in the rest state is X for being reserved as standby batteries.
Furthermore, when any retired power battery in a working state fails, the BMS connected with the retired power battery controls the corresponding working relay to be switched off, the standby relay is switched on, the retired power battery is switched to a rest state, one of the retired power batteries in the rest state is switched to the working state at the same time, the retired power battery in the failure is replaced, and the voltage specification of the energy storage system after replacement meets the power supply requirement.
Furthermore, the energy storage system adopts a periodic working mode, the number of cycles is taken as a unit, when the number of cycles of the retired power batteries in the working state reaches a preset value, one of the retired power batteries in the working state is switched to the rest state in sequence, and one of the retired power batteries in the rest state is switched to the working state, so that each retired power battery is guaranteed to have reasonable working load.
A management method of an energy storage system using retired batteries comprises the following steps:
when any retired power battery in the working state breaks down, the retired power battery is switched to the rest state, and one of the retired power batteries in the rest state is switched to the working state.
A management method of an energy storage system using retired batteries comprises the following steps:
and when the cycle number of the retired power batteries in the working state reaches a preset value, switching one of the retired power batteries in the working state to a rest state, and switching one of the retired power batteries in the rest state to the working state.
Compared with the prior art, the energy storage system utilizing the retired battery and the management method thereof have the following advantages:
the energy storage system utilizing the retired batteries can control whether each retired power battery participates in work or not through the relay group, sequentially controls a plurality of retired power batteries to be combined, achieves composite sharing, prolongs the service life, and meanwhile replaces the batteries in time according to the working state of the batteries without field treatment of operators, so that the stable operation of the energy storage system is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an energy storage system using retired batteries according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an energy storage system using retired batteries according to embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of an energy storage system using retired batteries according to embodiment 2 of the present invention;
fig. 4 is a schematic structural diagram of an energy storage system using retired batteries according to embodiment 3 of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
As shown in fig. 1 and 2, the energy storage system using retired batteries according to the present invention includes an inverter PCS and a battery module, the inverter PCS is electrically connected to the battery module, the battery module includes a plurality of retired power batteries connected in series in sequence, the entire energy storage system is formed by calculating the required serial connection of N retired power batteries according to the voltage specification requirement of the energy storage system and the voltage specification of the retired power batteries, the entire energy storage system is formed by connecting N + X batteries in series in consideration of the instability of the retired power batteries and the specific battery condition, and relays a and B are designed outside each battery. The A/B relays are controlled by the BMS according to the battery condition and the system operation strategy. When the current N batteries work, the relays from A1 to AN are closed, meanwhile, the relays from B1 to BN are opened, the relays from AN +1 to AN + X are opened, and the relays from BN +1 to BN + X are closed.
Example 2
Based on the above embodiment, as shown in fig. 3, if the battery 2 has a fault, the BMS is controlled to open the A2 relay and close the B2 relay, so that the battery 2 does not participate in the operation, and the voltage of the entire energy storage system does not satisfy the DC direct current range because the faulty battery does not operate any more, and 1 battery is selected to replace the faulty battery 2 to operate according to the battery states of the batteries N +1 to N + X, thereby ensuring that the total number of the batteries in the operating state is unchanged.
Example 3
Based on the embodiment, in order to consider that the working load of the retired power battery is large, the periodic working mode is selected according to the actual power utilization condition: the number of cycles is taken as a unit, wherein the cycle of the first cycle is from battery 1 to battery N as the working battery, as shown in fig. 2, the cycle of the second cycle is from battery 2 to battery N +1 as the working battery, as shown in fig. 4, the cycle of the third cycle is from battery 3 to battery N +2 as the working battery, and so on. And each battery is ensured to have reasonable work load.
Through the combination of above mode, can realize energy storage system normal operating under the battery module trouble condition, need not to shut down the operation and maintain the battery, the accessible distributes total load to all batteries simultaneously, prolongs battery echelon life.
Claims (6)
1. An energy storage system using retired batteries, comprising: including inverter PCS and battery module, inverter PCS and battery module electric connection, the battery module is including a plurality of power battery of retirement that establish ties in proper order, the power battery one-to-one of retirement is connected with BMS and relay group, relay group includes the working relay who establishes ties with the power battery of retirement and the stand-by relay who connects in parallel with the power battery of retirement.
2. The energy storage system using retired batteries according to claim 1, wherein: the number of the retired power batteries in the energy storage system is N + X, the number of the retired power batteries in a working state at the same time is N, and the number of the retired power batteries in a rest state is X.
3. The energy storage system using retired batteries according to claim 2, wherein: when any retired power battery in the working state has a fault, the retired power battery is switched to the rest state, and one of the retired power batteries in the rest state is switched to the working state.
4. The energy storage system using retired batteries according to claim 2, wherein: and when the cycle number of the retired power batteries in the working state reaches a preset value, switching one of the retired power batteries in the working state to a rest state, and switching one of the retired power batteries in the rest state to the working state.
5. A management method for an energy storage system using retired batteries is characterized by comprising the following steps: when any retired power battery in the working state has a fault, the retired power battery is switched to the rest state, and one of the retired power batteries in the rest state is switched to the working state.
6. A management method for an energy storage system using retired batteries is characterized by comprising the following steps: and when the cycle number of the retired power batteries in the working state reaches a preset value, switching one of the retired power batteries in the working state to a rest state, and switching one of the retired power batteries in the rest state to the working state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210968697.6A CN115441536A (en) | 2022-08-12 | 2022-08-12 | Energy storage system using retired battery and management method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210968697.6A CN115441536A (en) | 2022-08-12 | 2022-08-12 | Energy storage system using retired battery and management method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115441536A true CN115441536A (en) | 2022-12-06 |
Family
ID=84242163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210968697.6A Pending CN115441536A (en) | 2022-08-12 | 2022-08-12 | Energy storage system using retired battery and management method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115441536A (en) |
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2022
- 2022-08-12 CN CN202210968697.6A patent/CN115441536A/en active Pending
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