CN214607166U - Shared energy storage system with equalization circuit structure - Google Patents
Shared energy storage system with equalization circuit structure Download PDFInfo
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- CN214607166U CN214607166U CN202023216354.XU CN202023216354U CN214607166U CN 214607166 U CN214607166 U CN 214607166U CN 202023216354 U CN202023216354 U CN 202023216354U CN 214607166 U CN214607166 U CN 214607166U
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- energy storage
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- battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model belongs to the field of automobile charging, specifically disclose a shared energy storage system with equalizer circuit structure, including energy storage unit and the charging device who charges for energy storage unit, the energy storage unit includes a plurality of groups of batteries, a plurality of groups of batteries and charging unit all are connected to a sharing direct current bus-bar, the positive pole of group of batteries with the positive pole of direct current bus-bar is connected, the negative pole of group of batteries with the negative pole of direct current bus-bar is connected, the charging device includes a plurality of charging units, be equipped with the switch between charging unit and the sharing direct current bus-bar; the battery pack comprises a plurality of battery monomers connected in series, each battery monomer is connected with an MOS (metal oxide semiconductor) tube in parallel, and a shared coil winding is arranged between every two adjacent MOS tubes. The utility model discloses the group battery can dilatation wantonly and the wiring is simple, and the charging unit can charge for all group batteries, avoids the charging unit idle, has the equalizer circuit structure in the group battery, guarantees the reliability of group battery.
Description
Technical Field
The utility model relates to an automobile charging field especially relates to a shared energy storage system with equalizer circuit structure.
Background
The number of battery packs in the energy storage pile and the number of charging modules are large, and in order to improve energy storage efficiency, the battery packs need to be grouped and charged simultaneously.
In the current market, a mode of distributing one battery pack to each charging module is adopted, as shown in fig. 3, the number of the battery packs is the same as that of the charging modules, the voltage and the current are matched, the battery packs and the charging modules in the same number need to be added during capacity expansion, and when the charging power required by the capacity of the battery packs is smaller than that provided by the charging modules, resource waste is caused; in addition, when one of the modules is quickly full of the battery pack, the output power can be greatly reduced, the rest charging power cannot be distributed to other battery packs, and the charging module cannot exert the maximum charging power; in addition, the single batteries are in an unbalanced state in actual use due to different factors such as internal resistance, capacity and external environment of the batteries, the actual use capacity of the battery pack is lower than a design value due to a short plate effect due to imbalance among the batteries, and overcharge or overdischarge of part of the batteries can occur to affect the use characteristics of the batteries and reduce the service life, so that the operation of the whole energy storage stack is affected.
SUMMERY OF THE UTILITY MODEL
The utility model mainly provides a shared energy storage system with balanced circuit structure can solve among the prior art the module of charging can not exert maximum charging power, inconvenient dilatation and the unbalanced problem between the battery.
In order to solve the technical problem, the utility model provides a shared energy storage system with balanced circuit structure.
Specifically, the shared energy storage system with an equalization circuit structure comprises an energy storage unit 1 and a charging device 2 for charging the energy storage unit 1, wherein the energy storage unit 1 comprises a plurality of battery packs, the battery packs and the charging device 2 are connected to a shared direct current bus 3, the positive electrode of each battery pack is connected with the positive electrode of the shared direct current bus 3, the negative electrode of each battery pack is connected with the negative electrode of the shared direct current bus 3, the charging device 2 comprises a plurality of charging units, and a switch is arranged between each charging unit and the shared direct current bus 3;
the battery pack comprises a plurality of battery monomers connected in series, each battery monomer is connected with an MOS (metal oxide semiconductor) tube in parallel, and a shared coil winding is arranged between every two adjacent MOS tubes.
Preferably, the energy storage unit 1 further includes a battery controller 11 and a plurality of detection units corresponding to the plurality of battery packs, and the battery controller 11 is respectively in control connection with the plurality of detection units.
Preferably, a shared energy storage system with an equalization circuit structure, a bidirectional dc converter 12 is connected between the battery pack and the shared dc bus 3, the detection unit includes a front end detection unit 13 disposed between the battery pack and the bidirectional dc converter 12 and a rear end detection unit 14 disposed between the bidirectional dc converter 12 and the shared dc bus 3, and the battery pack controller 11 is in control connection with the front end detection unit 13, the bidirectional dc converter 12 and the rear end detection unit 14, respectively.
Preferably, the shared energy storage system with the equalization circuit structure further comprises a main controller arranged in the energy storage stack, and the main controller is connected with the battery pack controller 11 through a CNA bus.
Preferably, a shared energy storage system with an equalizing circuit structure is provided, a temperature detection unit is arranged in the energy storage unit 1, and the battery pack controller 11 is in control connection with the temperature detection unit.
Preferably, the front-end detection unit 13 and the back-end detection unit 14 each include a voltage sensor and a current sensor.
Preferably, the shared energy storage system with the equalization circuit structure, the charging unit comprises a charging circuit 22 and a main relay 21, the charging circuit 22 is connected with the main relay 21 in parallel, and the charging circuit 22 comprises a charging relay 221 and a charging resistor 222 which are connected in series.
Preferably, the number of the battery cells is even.
Preferably, the shared energy storage system with the equalization circuit structure is formed by hinging the plurality of battery packs together.
Preferably, the shared energy storage system with the equalization circuit structure comprises a plurality of battery packs, and the plurality of battery packs are arranged in a movable shell.
The utility model has the advantages that: (1) different from the prior art, the utility model discloses a plurality of groups of batteries and charging device 2 all are connected to a sharing DC bus 3, the negative pole of group of batteries and charging device 2 include a plurality of charging units, be equipped with the switch between charging unit and sharing DC bus 3, adopt the mode of a DC bus of all groups of batteries, charging unit sharing, the group of batteries can the dilatation wantonly, directly connect a wire to sharing DC bus 3 during the dilatation, the wiring is simple and convenient; the number of the charging units and the number of the battery packs do not need to be the same; according to the scheme, the voltage and current ranges of the battery pack are consistent with those of the charging pile, when the charging unit is powered off, the energy storage unit 1 can directly charge the vehicle end through the shared direct current bus without conversion processing of the charging unit; the charging unit can be kept running at full power until all batteries are fully charged, so that the power of the charging module is prevented from being idle; the battery pack comprises a plurality of battery monomers connected in series, each battery monomer is connected with an MOS (metal oxide semiconductor) tube in parallel, and a shared coil winding is arranged between every two adjacent MOS tubes, so that the balance from the battery monomers to the battery monomers can be realized, and the reliability of an energy storage system is improved; (2) a bidirectional direct current converter 12 is connected between the battery pack and the shared direct current bus 3, and the charging/discharging of the battery pack is controlled through the bidirectional direct current converter 1; (3) a plurality of battery packs are hinged together and arranged in a movable shell to be conveniently detached and shared for other vehicles.
Drawings
Fig. 1 is a schematic diagram of a shared energy storage structure with an equalizing circuit structure according to the present invention;
fig. 2 is a schematic diagram of a battery pack in a shared energy storage system with an equalization circuit structure;
FIG. 3 is a schematic diagram of a prior art stand alone power supply energy storage configuration;
FIG. 4 is a schematic diagram of a shared energy storage structure with an equalization circuit structure with a controller and a detection unit;
fig. 5 is a schematic structural diagram of the charging unit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and more complete, the following embodiments are further illustrated with reference to the accompanying drawings.
Example 1
In an exemplary embodiment, a shared energy storage system with an equalization circuit structure is provided. As shown in fig. 1, a shared energy storage system with an equalization circuit structure includes an energy storage unit 1 and a charging device 2 for charging the energy storage unit 1, where the energy storage unit 1 includes a plurality of battery packs, the battery packs and the charging device 2 are both connected to a shared dc bus 3, an anode of the battery pack is connected to an anode of the shared dc bus 3, a cathode of the battery pack is connected to a cathode of the shared dc bus 3, the charging device 2 includes a plurality of charging units, and a switch is disposed between the charging units and the shared dc bus 3;
as shown in fig. 2, the battery pack includes a plurality of battery cells connected in series, each battery cell is connected in parallel with an MOS transistor, and a shared coil winding is disposed between two adjacent MOS transistors.
Further, the energy storage unit 1 further includes a battery controller 11 and a plurality of detection units corresponding to the plurality of battery packs, and the battery controller 11 is respectively in control connection with the plurality of detection units.
The principle of the device is as follows: the existing wiring mode is changed, all the battery packs and the charging units are connected to one shared direct current bus 3, when the battery packs are charged, a switch and a closing switch are arranged between the charging units and the shared direct current bus 3, the charging units charge the battery packs through the shared direct current bus 3, the switch is disconnected, the corresponding charging units stop supplying power, each charging unit can supply power to all the battery packs as the battery packs and the charging units are connected to one shared direct current bus 3, and the number of the charging units can be started according to requirements during actual use. In addition, fill electric pile also direct connection to sharing dc bus 3 on, the group battery voltage and the electric current scope with fill the unanimity that electric pile needs, when all charging unit had a power failure, the group battery can discharge this moment, directly supplies power for the car end through sharing dc bus 3.
The utility model discloses an equilibrium principle does: as shown in fig. 2, each battery pack includes 4 battery cells, which are battery cell c1, battery cell c2, battery cell c3 and battery cell c4, MOS transistors are connected in parallel to each of battery cell c1, battery cell c2, battery cell c3 and battery cell c4, and a shared coil winding is disposed between two adjacent MOS transistors. The MOS tube comprises a P-channel MOS tube and an N-channel MOS tube, the MOS tube which is provided with a P channel and corresponds to the battery monomer c1 and the battery monomer c3, the MOS tube which is provided with an N channel is adopted for the battery monomer c2 and the battery monomer c4, the coil winding L1 is shared between the battery monomer c1 and the battery monomer c2, the coil winding L2 is shared between the battery monomer c3 and the battery monomer c4, the coil winding L1 is coupled with the coil winding L2, and when the two adjacent battery monomers are balanced, the shared coil winding and the two adjacent battery monomers which need to be balanced form a bidirectional voltage boosting-reducing circuit; when the balance is carried out between the nonadjacent battery monomers, the shared coil winding and the two battery monomers needing the balance form a bidirectional flyback circuit together. Thereby equalizing the battery cells between the electromagnetic groups.
Further, the number of the battery cells is an even number, 4 are selected in this embodiment, and the number of the battery cells may also be another even number.
Further, the shared energy storage system with the equalization circuit structure is characterized in that the plurality of battery packs are hinged together.
Further, a shared energy storage system with an equalization circuit structure, the plurality of battery packs are disposed in a movable housing. A plurality of battery packs are hinged together and arranged in a movable shell to be conveniently detached and shared for other vehicles.
Example 2
In addition to embodiment 1, as shown in fig. 4, a bidirectional dc converter 12 is connected between the battery pack and the shared dc bus 3, the detection unit includes a front end detection unit 13 disposed between the battery pack and the bidirectional dc converter 12 and a rear end detection unit 14 disposed between the bidirectional dc converter 12 and the shared dc bus 3, and the battery pack controller 11 is respectively connected to the front end detection unit 13, the bidirectional dc converter 12, and the rear end detection unit 14 in a control manner.
Specifically, the detection unit includes a front-end detection unit 13 and a rear-end detection unit 14, the front-end detection unit 1 is configured to collect state monitoring data of the battery pack, the rear-end detection unit 14 is configured to collect state monitoring data of the bidirectional dc converter 12, the front-end detection unit 13 and the rear-end detection unit 14 transmit data information to the battery pack controller 11, the battery pack controller 11 switches a charging/discharging mode of the energy storage unit 1 by controlling the bidirectional dc converter 12, and the battery pack obtains electric energy from the shared dc bus 3 through the bidirectional dc converter 12 or outputs the electric energy to the dc bus.
Further, the shared energy storage system with the equalization circuit structure further comprises a main controller arranged in the energy storage stack, and the main controller is connected with the battery pack controller 11 through a CNA bus. Through the communication between the main controller and the battery pack controller 11, the energy storage stack can conveniently master and control the conditions in the battery pack.
Further, a shared energy storage system with an equalization circuit structure is provided, a temperature detection unit is arranged in the energy storage unit 1, and the battery pack controller 11 is in control connection with the temperature detection unit.
Further, the front end detection unit 13 and the rear end detection unit 14 each include a voltage sensor and a current sensor.
Further, as shown in fig. 5, the charging unit includes a charging circuit 22 and a main relay 21, the charging circuit 22 is connected in parallel with the main relay 21, and the charging circuit 22 includes a charging relay 221 and a charging resistor 222 connected in series.
The charging resistor 222 is a resistor for slowly charging the battery at the initial high-voltage electrifying stage of the energy storage stack, if the charging resistor 222 is not provided, the capacitor is broken down due to overlarge charging current, the high-voltage electricity is directly added to the capacitor, which is equivalent to instantaneous short circuit, and the overlarge short-circuit current can damage high-voltage electric elements, so that the charging resistor 222 is added when a loop is designed to ensure the safety of the circuit.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A shared energy storage system with an equalization circuit structure, comprising an energy storage unit (1) and a charging device (2) for charging the energy storage unit (1), characterized in that:
the energy storage unit (1) comprises a plurality of battery packs, the battery packs and the charging device (2) are connected to a shared direct current bus (3), the positive pole of each battery pack is connected with the positive pole of the shared direct current bus (3), the negative pole of each battery pack is connected with the negative pole of the shared direct current bus (3), the charging device (2) comprises a plurality of charging units, and a switch is arranged between each charging unit and the shared direct current bus (3);
the battery pack comprises a plurality of battery monomers connected in series, each battery monomer is connected with an MOS (metal oxide semiconductor) tube in parallel, and a shared coil winding is arranged between every two adjacent MOS tubes.
2. The shared energy storage system with an equalization circuit structure as claimed in claim 1, wherein: the energy storage unit (1) further comprises a battery pack controller (11) and a plurality of detection units arranged corresponding to the plurality of battery packs, and the battery pack controller (11) is respectively in control connection with the plurality of detection units.
3. The shared energy storage system with an equalization circuit structure as claimed in claim 2, wherein: the battery pack controller is characterized in that a bidirectional direct-current converter (12) is connected between the battery pack and the shared direct-current bus (3), the detection unit comprises a front-end detection unit (13) arranged between the battery pack and the bidirectional direct-current converter (12) and a rear-end detection unit (14) arranged between the bidirectional direct-current converter (12) and the shared direct-current bus (3), and the battery pack controller (11) is respectively in control connection with the front-end detection unit (13), the bidirectional direct-current converter (12) and the rear-end detection unit (14).
4. The shared energy storage system with an equalization circuit structure as claimed in claim 3, wherein: the system also comprises a main controller arranged in the energy storage stack, and the main controller is connected with the battery pack controller (11) through a CNA bus.
5. The shared energy storage system with an equalization circuit structure as claimed in claim 2, wherein: the energy storage unit (1) is internally provided with a temperature detection unit, and the battery pack controller (11) is in control connection with the temperature detection unit.
6. The shared energy storage system with an equalization circuit structure as claimed in claim 3, wherein: the front end detection unit (13) and the rear end detection unit (14) both comprise a voltage sensor and a current sensor.
7. The shared energy storage system with an equalization circuit structure as claimed in claim 1, wherein: the charging unit comprises a charging circuit (22) and a main relay (21), the charging circuit (22) is connected with the main relay (21) in parallel, and the charging circuit (22) comprises a charging relay (221) and a charging resistor (222) which are connected in series.
8. The shared energy storage system with an equalization circuit structure as claimed in claim 1, wherein: the number of the battery cells is even.
9. The shared energy storage system with an equalization circuit structure as claimed in claim 1, wherein: the plurality of battery packs are hinged together.
10. The shared energy storage system with an equalization circuit structure as claimed in claim 9, wherein: the plurality of battery packs is disposed in a movable housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023216354.XU CN214607166U (en) | 2020-12-28 | 2020-12-28 | Shared energy storage system with equalization circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023216354.XU CN214607166U (en) | 2020-12-28 | 2020-12-28 | Shared energy storage system with equalization circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214607166U true CN214607166U (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023216354.XU Active CN214607166U (en) | 2020-12-28 | 2020-12-28 | Shared energy storage system with equalization circuit structure |
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|---|---|
| CN (1) | CN214607166U (en) |
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- 2020-12-28 CN CN202023216354.XU patent/CN214607166U/en active Active
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