CN213185531U - Energy storage converter and energy storage system of integrated battery collection cabinet - Google Patents
Energy storage converter and energy storage system of integrated battery collection cabinet Download PDFInfo
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- CN213185531U CN213185531U CN202021820949.3U CN202021820949U CN213185531U CN 213185531 U CN213185531 U CN 213185531U CN 202021820949 U CN202021820949 U CN 202021820949U CN 213185531 U CN213185531 U CN 213185531U
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Abstract
The utility model is suitable for a converter technical field provides an energy storage converter and energy storage system of integrated battery cabinet that converges, and this energy storage converter of integrated battery cabinet that converges includes: a current transformer, a first protection device, a second protection device, and a bus connection device; the first protection device is connected with the current converter; the second protection device is connected between the confluence connection device and the first protection device, and the confluence connection device is connected with the battery cabinet; or the second protection device is connected between the confluence connection device and the battery cabinet, and the confluence connection device is connected with the first protection device. The utility model discloses can the hardware cost of the energy storage converter of lowering system and integrated battery collection flow cabinet.
Description
Technical Field
The utility model belongs to the technical field of the converter, especially, relate to an energy storage converter and energy storage system of integrated battery collection flow cabinet.
Background
The energy storage converter (PCS) can control the charging and discharging processes of the storage battery, carry out alternating current and direct current Conversion, and can directly supply Power for alternating current loads under the condition of no Power grid. The PCS is composed of a DC/AC bidirectional converter, a control unit and the like. The PCS controller receives a background control instruction through communication, and controls the converter to charge or discharge the battery according to the symbol and the size of the power instruction, so that the active power and the reactive power of the power grid are adjusted. The PCS controller is communicated with the BMS through the CAN interface to acquire the state information of the battery pack, so that the protective charging and discharging of the battery CAN be realized, and the running safety of the battery is ensured.
In a typical energy storage system, the energy storage converters are connected to the battery cabinet through a bus bar cabinet, as shown in fig. 1. The topology comprises a bus cabinet, and the circuit breaker in the bus cabinet and the direct current circuit breaker of the energy storage converter are redundant, so that the system cost is greatly increased.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides an energy storage converter of integrated battery conflux cabinet aims at solving among the prior art circuit breaker in traditional battery conflux cabinet and energy storage converter's direct current breaker redundancy, causes the problem that system cost increases substantially.
The embodiment of the utility model provides an energy storage converter of integrated battery collection flow cabinet, include:
a current transformer, a first protection device, a second protection device, and a bus connection device;
the first protection device is connected with the current transducer;
the second protection device is connected between the confluence connection device and the first protection device, and the confluence connection device is connected with the battery cabinet;
or the second protection device is connected between the confluence connection device and the battery cabinet, and the confluence connection device is connected with the first protection device.
Further, when the second protection device is connected between the bus connection device and the first protection device, the bus connection device being connected to a battery cabinet, the second protection device includes:
a first positive electrode protection unit connected between a positive electrode bus bar connection unit of the bus bar connection device and the first protection device; and
a first negative electrode protection unit connected between a negative electrode bus bar connection unit of the bus bar connection device and the first protection device.
Still further, the positive electrode bus bar connection unit includes: the positive electrode bus-bar interface comprises a plurality of positive electrode bus-bar interfaces and positive electrode main connecting ends which are connected with each positive electrode bus-bar interface; the positive electrode bus interface is connected with the positive electrodes of the battery modules in a one-to-one correspondence manner, and the positive electrode main connecting end is connected with the first positive electrode protection unit;
the negative bus bar connection unit includes: the negative electrode bus-bar interfaces correspond to the positive electrode bus-bar interfaces, and the negative electrode main connecting ends are connected with the negative electrode bus-bar interfaces;
and the negative electrode confluence interface is connected with the negative electrodes of the battery modules in a one-to-one correspondence manner, and the negative electrode main connecting end is connected with the first negative electrode protection unit.
Further, when the second protection device is connected between the junction connection device and the battery cabinet, and the junction connection device is connected with the first protection device, the positive junction connection unit of the junction connection device is connected with the second protection device and the first protection device, respectively, and the negative junction connection unit of the junction connection device is connected with the second protection device and the first protection device, respectively.
Still further, the second protection device includes:
the second positive electrode protection unit is connected between each positive electrode confluence interface and the positive electrode of each battery module; and
and the second negative electrode protection unit is connected between each negative electrode bus interface and the negative electrode of each battery module.
Furthermore, the bus bar connecting device is a bus bar connecting unit or a bus cable connecting unit.
Further, the first protection device is a circuit breaker or a load switch or a fuse.
Still further, the second protection device includes a fuse.
Furthermore, the battery module comprises a pre-charging resistor, a first relay, a second relay, a first fuse and a second fuse;
wherein, the one end of pre-charge resistance respectively with battery module anodal with the one end of second relay is connected, the other end of pre-charge resistance with the one end of first relay is connected, the other end of first relay with the one end of first fuse is connected, the other end of second relay with the one end of first fuse is connected, the other end of first fuse with the connecting device that converges is connected, second fuse one end is connected with battery module negative pole, the other end of second fuse with the connecting device that converges is connected.
The utility model also provides an energy storage system, including the energy storage converter and the battery cabinet of the integrated battery conflux cabinet that above-mentioned embodiment provided.
The utility model discloses the beneficial effect who reaches: through removing traditional battery collection flow cabinet, increased second protection device and the connecting device that converges on traditional basis for second protection device cooperates the function that realizes battery collection flow cabinet jointly with the connecting device that converges, with the electric current that converges in the battery cabinet to the current transformer. Meanwhile, internal elements of the energy storage converter of the integrated battery confluence cabinet can be protected from being damaged, and further the hardware cost of the system and the energy storage converter of the integrated battery confluence cabinet can be reduced.
Drawings
FIG. 1 is a schematic diagram of an energy storage system topology provided by the prior art;
fig. 2 is a schematic structural diagram of an energy storage converter of an integrated battery combiner cabinet according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an energy storage converter of an integrated battery combiner cabinet according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of an energy storage converter of another integrated battery combiner box according to an embodiment of the present invention.
The energy storage converter of the integrated battery confluence cabinet is disclosed as 1; 2. a current transformer; 3. a first protection device; 4. a second protection device; 5. a bus connection device; 6. a battery cabinet; 7. a battery module; 8. a first positive electrode protection unit; 9. a first negative electrode protection unit; 10. a positive electrode bus connection unit; 11. a negative electrode bus connection unit; 12. a second fuse; 13. a first fuse; 14. a first relay; 15. a second relay; 16. pre-charging a resistor; 17. a battery module positive electrode; 18. a negative electrode of the battery module; 19. a second positive electrode protection unit; 20. and a second negative electrode protection unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the utility model provides an in, remove through converging the cabinet with traditional battery, increased second protection device and the connecting device that converges on traditional basis for second protection device cooperates the function that realizes the battery and converge the cabinet jointly with the connecting device that converges, with the electric current that converges in the battery cabinet to the current transformer. Meanwhile, internal elements of the energy storage converter of the integrated battery confluence cabinet can be protected from being damaged, and further the hardware cost of the system and the energy storage converter of the integrated battery confluence cabinet can be reduced.
Example one
As shown in fig. 2, fig. 2 is a schematic structural diagram of an energy storage converter of an integrated battery combiner cabinet according to an embodiment of the present invention.
The energy storage converter 1 of the integrated battery bus cabinet comprises a current converter 2, a first protection device 3, a second protection device 4 and a bus connection device 5.
The first protection device 3 is connected to the current transformer 2, the second protection device 4 is connected between the bus connection device 5 and the first protection device 3, and the bus connection device 5 is connected to the battery cabinet 6.
Alternatively, the second protection device 4 is connected between the bus connection device 5 and the battery cabinet 6, and the bus connection device 5 is connected to the first protection device 3.
In the embodiment of the present invention, the battery cabinet 6 includes at least two battery modules 7.
The current converter 2 is used for converting current, such as converting direct current into alternating current or converting alternating current into direct current, and may be a DC/AC current converter or an AC/DC current converter.
The first protection device 3 is used for protecting the current transformer 2, and may be one or more of a breaker, a load switch, a fuse, or other devices or topologies capable of performing a protection function.
The second protection device 4 is used for protecting the first protection device 3 and the current transformer 2, and may be a fuse, a breaker, a fuse, or the like.
The embodiment of the present invention provides a junction connection device 5 and a second protection device 4 cooperate together to realize the function of a battery cabinet, and converge the current of a battery module 7 in a battery cabinet 6 together, and connect with a first protection device 3.
The bus bar connection device 5 may be a bus bar connection unit or a bus cable connection unit.
It should be noted that the bus bar connecting unit may be referred to as a bar, and the bus cable connecting unit may be referred to as a cable. The copper bar and the cable are both used for connecting a connecting part or a connecting mode between the energy storage converter 1 of the integrated battery convergence cabinet and the battery cabinet 6.
Specifically, the embodiment of the utility model provides a remove traditional battery collection flow cabinet, increase second protection device 4 and converge connecting device 5 in traditional energy storage converter's direct current side, when the fuse protection of 6 the inside of battery cabinet is inefficacy, can protect through the combination of second protection device 4 and first protection device 3 in integrated battery collection flow cabinet's energy storage converter 1, and then avoid among the battery cabinet 6 output current to burn out integrated battery collection flow cabinet's energy storage converter 1 when too big.
The utility model discloses an embodiment, install between junction device 5 and the first protection device 3 converge when second protection device 4, when junction device 5 and battery cabinet 6 are connected converge, as long as the current load of output is too big in the junction device 5 converges, just can be through this second protection device 4 open circuit between junction device 5 and the first protection device 3 that converges to together protect current transformer 2 with first protection device 3, and then reach the effect of the energy storage converter 1 of protection integrated battery cabinet that converges.
When the second protection device 4 is disposed between the bus bar connection device 5 and the first protection device 3, specifically, the second protection device 4 may be disposed on a main line between the bus bar connection device 5 and the first protection device 3.
Or, in the utility model discloses an in another embodiment, connect between connection device 5 and the battery cabinet 6 converge when second protection device 4, when connection device 5 and the first protection device 3 are connected converge, if the electric current of the positive negative pole of every battery module 7 exceeds the electric current of second protection device 4, then through the second protection device 4 open circuit between connection device 5 and the battery cabinet 6 that converges for the electric current of battery module 7 can not be received to connection device 5 converges, and protect current converter 2 with first protection device 3 together, further protect integrated battery and converge energy storage converter 1 of cabinet.
When the second protection device 4 is connected between the bus connection device 5 and the battery cabinet 6, specifically, the second protection device 4 may be connected between the positive electrode and the negative electrode of each battery module 7 and the bus connection device, that is, the second protection device 4 is disposed on each branch between the bus connection device 5 and the battery cabinet 6.
Still alternatively, in another embodiment of the present invention, the second protection device 4 may be connected between the junction connection device 5 and the battery cabinet 6, and may also be connected between the junction connection device 5 and the first protection device 3. In this way, the entire circuit can be protected by the second protection device 4 between the busbar connection device 5 and the battery cabinet 6 and the second protection device 4 between the busbar connection device 5 and the first protection device 3, and the energy storage converter 1 of the integrated battery busbar cabinet is protected.
In general, the mounting position of the second protection device 4 on the dc side of the energy storage converter 1 of the integrated battery bus bar cabinet may be the branch mounting between the battery module 7 and the bus bar connection device 5, the trunk mounting between the bus bar connection device 5 and the first protection device 3, or both.
The embodiment of the utility model provides an in, remove through converging the cabinet with traditional battery, increased second protection device 4 and converge connecting device 5 on traditional energy storage converter's basis for second protection device 4 cooperates the function that realizes the battery and converge the cabinet jointly with converging connecting device 5, and current converter 2 is converged to the electric current in the battery cabinet 6 with in the battery cabinet 6. Meanwhile, internal elements of the energy storage converter 1 of the integrated battery confluence cabinet can be protected from being damaged, and further the hardware cost of the system and the energy storage converter 1 of the integrated battery confluence cabinet can be reduced.
Example two
As shown in fig. 3, fig. 3 is a schematic circuit diagram of an energy storage converter of an integrated battery combiner cabinet according to an embodiment of the present invention.
When the second protection device 4 is connected between the bus bar connection device 5 and the first protection device 3 and the bus bar connection device 5 is connected with the battery cabinet 6, the second protection device 4 includes a first positive protection unit 8 connected between a positive bus bar connection unit 10 of the bus bar connection device 5 and the first protection device 3, and a first negative protection unit 9 connected between a negative bus bar connection unit 11 of the bus bar connection device 5 and the first protection device 3.
At this time, the second protection device 4 is installed in the trunk of the bus connection device 5.
Specifically, the first positive electrode protection unit 8 is installed in the trunk of the positive electrode bus connection unit 10. If the current in the positive electrode confluence connection unit 10 is larger than the current range of the first positive electrode protection unit 8, the first positive electrode protection unit 8 is turned off, and the positive electrode circuit can be protected.
The first negative electrode protection means 9 is attached to the trunk line of the negative bus bar connection means 11, and when the current of the negative bus bar connection means 11 is larger than the current range of the first negative electrode plate means, the first negative electrode protection means 9 is turned off, and the negative electrode circuit can be protected.
The first positive electrode protection unit 8 and the first negative electrode protection unit 9 may be mounted either or both at the same time. That is, the second protection device 4 of the energy storage converter 1 of the integrated battery bus bar cabinet may be installed on both the positive electrode and the negative electrode, or may be installed on only one of the positive electrode and the negative electrode to realize a protection function.
The positive electrode bus bar connection unit 10 includes a plurality of positive electrode bus bar interfaces, and positive electrode main connection terminals each connected to each positive electrode bus bar interface 10.
And one positive electrode bus interface is correspondingly connected with the positive electrodes 17 of the battery modules, and the positive electrode main connecting end is connected with the first positive electrode protection unit 8. In this way, when there are a plurality of battery modules 7 in the battery cabinet 6, the positive electrode of each battery module 7 can be connected to one positive electrode bus interface and output together through the positive electrode main connection terminal.
The negative bus bar connection unit 11 includes: a plurality of negative pole that corresponds with positive pole confluence interface to and all with every negative pole main connection end that the interface connection is converged.
And a negative electrode bus interface is correspondingly connected with the negative electrodes 18 of the battery modules one by one, and the main negative electrode connecting end is connected with the first negative electrode protection unit 11. In this way, when there are a plurality of battery modules 7 in the battery cabinet, the negative electrode of each battery module 7 can be connected to one negative electrode bus interface and input in common through the negative electrode main connection terminal.
The embodiment of the utility model provides an in, can be through installing second protection device 4 in the trunk circuit that converges connecting device 5, with respectively converge the first positive pole protection unit 8 of the trunk circuit installation of linkage unit 10 at the positive pole and converge the first negative pole protection unit 9 of the trunk circuit installation of linkage unit 11 at the negative pole and protect, can be fine with the energy storage converter 1 of the whole integrated battery of 3 combination protection of first protection device converge the cabinet, avoid 1 components and parts of energy storage converter of integrated battery to damage, reduce the hardware cost of energy storage converter 1 of integrated battery converge the cabinet.
EXAMPLE III
Referring to fig. 4, fig. 4 is a schematic circuit diagram of an energy storage converter of another integrated battery combiner box according to an embodiment of the present invention.
When the second protection device 4 is connected between the junction connection device 5 and the battery cabinet 6 and the junction connection device 5 is connected with the first protection device 3, the positive junction connection unit 10 of the junction connection device 5 is connected with the second protection device 4 and the first protection device 3, respectively, and the negative junction connection unit 11 of the junction connection device 5 is connected with the second protection device 4 and the first protection device 3, respectively.
In an embodiment of the present invention, the second protection device 4 includes a second positive electrode protection unit 19 connected between each positive electrode bus bar interface and each battery module positive electrode 17; and a second negative electrode protection unit 20 connected between each negative electrode bus interface and each battery module negative electrode 18.
The number of the positive bus interfaces and the number of the negative bus interfaces are the same, and the number of the positive bus interfaces and the number of the negative bus interfaces are the same as the number of the battery modules 7. The number of the second positive electrode protection units 19 and the second negative electrode protection units 20 also corresponds to the number of the battery modules 7.
At this time, the second protection devices 4 are installed in the respective branches between the bus bar connection device 5 and the battery cabinet 6.
Specifically, a battery module positive electrode 17 is connected with a second positive electrode protection unit 19 and then connected with a positive electrode bus interface. A battery module negative electrode 18 is connected to a second negative electrode protection unit 20 and then to a negative bus interface. In this way, before the current of the battery modules 7 is led to the bus connection device 5, each branch has its own protection device, which serves to protect the respective branch and at the same time protects the energy storage converter 1 of the entire integrated battery bus cabinet.
Of course, when the second protection devices 4 are installed in the respective branches between the bus bar connection device 5 and the battery cabinet 6, the number of the battery modules 7 is required to be small and the number is definitely known. If the branch ratio is more, the occupied space of the direct-current side copper bar of the energy storage converter 1 of the integrated battery header cabinet is larger, and the wiring of the system is more complicated. In addition, when the number of branches is large, a certain branch is short-circuited, and the current of the other branch is converged, which may exceed the breaking capacity of the second protection device 4.
It should be noted that, when the second protection device 4 is connected between the bus connection device 5 and the battery cabinet 6, and the bus connection device 5 is connected to the first protection device 3, one positive bus interface of the positive bus connection unit 10 is connected to one second positive protection unit 19, and the positive main connection terminal is directly connected to the first protection device 3. One negative electrode bus interface in the positive electrode bus connection unit 10 is connected to a second negative electrode protection unit 20, and the negative electrode main connection terminal is directly connected to the first protection device 3.
The embodiment of the utility model provides an in, through installing second protection device 4 in each branch road between junction device 5 and the battery cabinet 6 converges to through energy storage converter 1 of protecting the whole integrated battery of each branch road protection converge the cabinet, energy storage converter 1 of integrated battery converge the cabinet can realize that the function of battery converge the cabinet also can reduce system and integrated battery converge the energy storage converter 1's of cabinet cost.
Example four
Referring to fig. 3, the battery module 7 includes a pre-charge resistor 16, a first relay 14, a second relay 15, a first fuse 13, and a second fuse 12.
Wherein, the one end of pre-charge resistance 16 is connected with the anodal 17 of battery module and the one end of second relay 15 respectively, the other end of pre-charge resistance 16 is connected with the one end of first relay 14, the other end of first relay 14 is connected with the one end of first fuse 13, the other end of second relay 15 is connected with the one end of first fuse 13, the other end of first fuse 13 with converge connecting device 5 and be connected, second fuse 12 one end is connected with battery module negative pole 18, the other end of second fuse 12 with converge connecting device 5 and be connected.
Specifically, one end of the first relay 14 carrying the turn knife is connected with the pre-charging resistor 16, and one end of the first relay without the turn knife is connected with the first fuse 13. One end of the second relay 15 carrying the turn knife is connected to a connecting wire between the first fuse 13 and the first relay 14, and one end of the second relay without the turn knife is connected to a connecting wire between the positive electrode 17 of the battery module and the pre-charging resistor 16.
It should be noted that the number of the battery modules 7 in the battery cabinet 6 may be multiple, and of course, the number may be selected and set according to actual situations. The components and the connection relationship between the components included in each battery module 7 in the battery cabinet 6 are the same, and are not described herein again.
The embodiment of the utility model provides an in, can with the multiunit battery module 7 in the battery cabinet 6 through converging in connecting device 5 and the 4 cooperation protections of second protection device converge to integrated battery and converge in the energy storage converter 1 of cabinet, can realize protecting the energy storage converter 1 that integrated battery converged the cabinet when the battery converges, the cost of the energy storage converter 1 of the cabinet is converged to the lowering system and integrated battery.
EXAMPLE five
The embodiment of the utility model provides a pair of energy storage system's schematic structure diagram.
The energy storage system comprises the energy storage converter 1 integrated with the battery combiner box and the battery box 6 provided in the embodiment.
The embodiment of the utility model provides an in, can remove through converging the cabinet with traditional battery, increased second protection device 4 and converge connecting device 5 on traditional energy storage converter's basis for second protection device 4 cooperates the function that realizes the battery and converge the cabinet jointly with converging connecting device 5, and current converter 2 is converged to the electric current in at least two sets of battery module 7 in with battery cabinet 6. Meanwhile, internal elements of the energy storage converter 1 of the integrated battery confluence cabinet can be protected from being damaged, and further the hardware cost of the system and the energy storage converter 1 of the integrated battery confluence cabinet can be reduced. Further reducing the hardware cost of the energy storage system.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An energy storage converter of an integrated battery collection cabinet, comprising:
a current transformer, a first protection device, a second protection device, and a bus connection device;
the first protection device is connected with the current transducer;
the second protection device is connected between the confluence connection device and the first protection device, and the confluence connection device is connected with the battery cabinet;
or the second protection device is connected between the confluence connection device and the battery cabinet, and the confluence connection device is connected with the first protection device.
2. The integrated battery busway energy storage converter of claim 1, wherein when said second protection device is connected between said busway connection device and said first protection device, said busway connection device being connected to a battery cabinet, said second protection device comprises:
a first positive electrode protection unit connected between a positive electrode bus bar connection unit of the bus bar connection device and the first protection device; and
a first negative electrode protection unit connected between a negative electrode bus bar connection unit of the bus bar connection device and the first protection device.
3. The energy storage converter of an integrated battery bus bar cabinet of claim 2, wherein the positive bus bar connection unit comprises: the positive electrode bus-bar interface comprises a plurality of positive electrode bus-bar interfaces and positive electrode main connecting ends which are connected with each positive electrode bus-bar interface; the positive electrode bus interface is connected with the positive electrodes of the battery modules in a one-to-one correspondence manner, and the positive electrode main connecting end is connected with the first positive electrode protection unit;
the negative bus bar connection unit includes: the negative electrode bus-bar interfaces correspond to the positive electrode bus-bar interfaces, and the negative electrode main connecting ends are connected with the negative electrode bus-bar interfaces;
and the negative electrode confluence interface is connected with the negative electrodes of the battery modules in a one-to-one correspondence manner, and the negative electrode main connecting end is connected with the first negative electrode protection unit.
4. The energy storage converter of an integrated battery bus bar cabinet according to claim 1, wherein when the second protection device is connected between the bus connection device and the battery cabinet, and the bus connection device is connected with the first protection device, the positive bus connection unit of the bus connection device is connected with the second protection device and the first protection device, respectively, and the negative bus connection unit of the bus connection device is connected with the second protection device and the first protection device, respectively.
5. The integrated battery busway energy storage converter of claim 4, wherein said second protection means comprises:
the second positive electrode protection unit is connected between each positive electrode confluence interface and the positive electrode of each battery module; and
and the second negative electrode protection unit is connected between each negative electrode bus interface and the negative electrode of each battery module.
6. An energy storing converter according to any of claims 1 to 5, wherein said bus connection means is a bus bar connection unit or a bus cable connection unit.
7. An energy storage converter for an integrated battery bus bar according to any of claims 1 to 5, wherein said first protection device is a circuit breaker or a load switch or a fuse.
8. An energy storage converter for an integrated battery bus bar according to any of claims 1 to 5, wherein said second protection means comprises a fuse.
9. The energy storage converter of an integrated battery bus cabinet of claim 3, wherein the battery module comprises a pre-charge resistor, a first relay, a second relay, a first fuse, and a second fuse;
wherein, the one end of pre-charge resistance respectively with battery module anodal with the one end of second relay is connected, the other end of pre-charge resistance with the one end of first relay is connected, the other end of first relay with the one end of first fuse is connected, the other end of second relay with the one end of first fuse is connected, the other end of first fuse with the connecting device that converges is connected, second fuse one end is connected with battery module negative pole, the other end of second fuse with the connecting device that converges is connected.
10. An energy storage system comprising an energy storage converter integrated with a battery combiner cabinet according to any of claims 1-9 and a battery cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021820949.3U CN213185531U (en) | 2020-08-26 | 2020-08-26 | Energy storage converter and energy storage system of integrated battery collection cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021820949.3U CN213185531U (en) | 2020-08-26 | 2020-08-26 | Energy storage converter and energy storage system of integrated battery collection cabinet |
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| CN213185531U true CN213185531U (en) | 2021-05-11 |
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