CN110299733B - Integrated power battery pack, energy storage system and method for storing energy by using echelon battery pack - Google Patents
Integrated power battery pack, energy storage system and method for storing energy by using echelon battery pack Download PDFInfo
- Publication number
- CN110299733B CN110299733B CN201810246425.9A CN201810246425A CN110299733B CN 110299733 B CN110299733 B CN 110299733B CN 201810246425 A CN201810246425 A CN 201810246425A CN 110299733 B CN110299733 B CN 110299733B
- Authority
- CN
- China
- Prior art keywords
- power battery
- energy storage
- storage system
- voltage
- integrated power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to an integrated form power battery package, energy storage system and use method of echelon battery package energy storage belongs to the energy field, can increase the flexibility ratio of echelon utilization again, increases energy storage system's design flexibility ratio to can satisfy different customers' different demands. The energy storage system comprises a plurality of parallel echelon battery packs, and the echelon battery packs are integrated power battery packs which are directly used.
Description
Technical Field
The disclosure relates to the field of energy, and in particular to an integrated power battery pack, an energy storage system and a method for storing energy by using an echelon battery pack.
Background
At present, when a power battery pack decommissioned on an electric vehicle is reused in an occasion with relatively low requirements on the power battery pack, such as an energy storage power station, the decommissioned power battery pack needs to be disassembled, that is, a battery module in the power battery pack and a battery management unit are disassembled, then the disassembled battery module is subjected to individual testing, screening and matching to form a battery stack by recombining the battery modules with similar battery state parameters (such as capacity, voltage and the like), and the recombined battery stack is applied to an energy storage system of the energy storage power station and serves as an energy storage unit of the energy storage system. Furthermore, the disassembled cell management units are eliminated and the cell management units in the energy storage system using the reconstituted cell stack need to be redesigned, developed, manufactured, and matched. Thus, existing re-staging solutions increase labor and cost.
Disclosure of Invention
The purpose of the present disclosure is to provide an integrated power battery pack, an energy storage system and a method for storing energy by using a echelon battery pack, which can overcome the defects existing in the existing re-echelon utilization scheme.
In order to achieve the above object, the present disclosure provides an integrated power battery pack, which includes a pack body, a power battery module disposed in the pack body, and a voltage conversion module integrated with the pack body, wherein the voltage conversion module is connected in series with the power battery module, and the voltage conversion module is configured to convert a dc output voltage of the power battery module into a preset ac voltage when the integrated power battery pack is discharged.
Optionally, the voltage conversion module is further configured to convert a charging voltage input to the integrated power battery pack into a voltage suitable for charging the power battery module when the integrated power battery pack is charged.
Optionally, the voltage conversion module is a combination of a DC/DC conversion module and a DC/AC conversion module or a bidirectional vehicle-mounted charger, wherein the DC/DC conversion module is connected in series between the power battery module and the DC/AC conversion module, one end of the DC/AC conversion module is connected to the DC/DC conversion module, and the other end of the DC/AC conversion module outputs the preset alternating voltage.
Optionally, the DC/DC conversion module and the DC/AC conversion module are a bidirectional DC/DC conversion module and a bidirectional DC/AC conversion module, respectively.
Optionally, a distribution box is further arranged in the package body, and is used for detecting the current of the bus of the power battery module and controlling the action execution of each contactor in the charge-discharge loop when the integrated power battery package is charged and discharged.
Optionally, the voltage conversion module is disposed in the bag body or fixed on an outer wall of the bag body.
Optionally, the power battery module comprises a plurality of battery modules connected together in series and/or in parallel.
Optionally, the power battery module includes a battery control unit, a plurality of battery modules and a plurality of battery management units, the plurality of battery modules and the plurality of battery management units correspond one to one and the battery management units are configured to manage the battery modules corresponding thereto, and the battery control unit is configured to manage the power battery module.
Optionally, the bag body comprises two cavities, wherein one cavity is used for accommodating the plurality of battery modules and the plurality of battery management units, and the other cavity is used for accommodating the battery control unit, the voltage conversion module and the distribution box.
The present disclosure also provides an energy storage system comprising a plurality of echelon battery packs connected in parallel, the echelon battery packs being integrated power battery packs according to the above description that are directly used.
Optionally, the energy storage system further includes a switch cabinet and a transformer, wherein a plurality of parallel branches formed by connecting the echelon battery packs in parallel are sequentially connected in series with the switch cabinet and the transformer.
Optionally, the preset ac voltage is a first preset ac voltage, and the echelon battery pack includes a plurality of groups of integrated power battery packs that are directly used, each group of integrated power battery packs that are directly used includes a plurality of integrated power battery packs that are directly used, the energy storage system further includes a plurality of phase angle adjusting modules, each group of phase angle adjusting modules that are directly used all of the integrated power battery packs that are directly used are connected in parallel and then are connected in series with one of the phase angle adjusting modules to form a series branch, all of the series branches are connected in parallel, and the phase angle adjusting modules adjust the phase angle of the first preset ac voltage output by the integrated power battery packs that are directly used and connected with the phase angle adjusting modules so that all of the series branches output a second preset ac voltage.
Optionally, the energy storage system further includes a switch cabinet and a transformer, wherein all the parallel branches formed by connecting the series branches in parallel are sequentially connected in series with the switch cabinet and the transformer.
Optionally, the parallel branch is electrically connected to the switch cabinet through an ac bus.
Optionally, the switchgear is a low voltage switchgear.
Optionally, the switch cabinet is used for realizing relay protection and electric quantity metering during charging and discharging of the energy storage system.
The present disclosure also provides a method of storing energy using a echelon battery pack, the echelon battery pack being an integrated power battery pack according to the above description, the method comprising:
in a plurality of parallel-connected integrated power battery packs, a voltage conversion module integrated with a pack body of the integrated power battery pack receives direct-current output voltage of a power battery module arranged in the pack body of the same integrated power battery pack;
the voltage conversion modules in the plurality of parallel integrated power battery packs convert the received direct current output voltage into a preset alternating current voltage.
By adopting the technical scheme, the voltage conversion module in the integrated power battery pack can convert the direct current output voltage of the power battery module in the integrated power battery pack into the preset alternating current voltage when the energy storage system discharges, so that when the integrated power battery pack configured in the way is directly applied to the energy storage system as a echelon battery pack, whether battery state parameters such as voltage, capacity and electric quantity of the retired integrated power battery pack have consistency or not does not need to be considered, the flexibility of reuse is greatly increased, the design flexibility of the energy storage system is increased, and different requirements of different customers can be met. In addition, because the decommissioned integrated power battery pack does not need to be disassembled and recombined, compared with the prior art, the integrated power battery pack saves the cost and labor for reuse, reduces the screening difficulty, improves the social and economic benefits, retains the battery management system in the original integrated power battery pack, does not need to be redeveloped and applied to the battery management system of the energy storage system, can also provide the energy storage system with diversified configuration to meet different market demands and power grid voltages, and improves the market competitiveness and the customer satisfaction degree of the energy storage product.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a schematic block diagram of an integrated power cell package according to one embodiment of the present disclosure;
FIG. 2 is yet another schematic block diagram of an integrated power cell package according to an embodiment of the present disclosure;
FIG. 3 is yet another schematic block diagram of an integrated power cell package according to an embodiment of the present disclosure;
FIG. 4 is a schematic block diagram of an energy storage system according to an embodiment of the present disclosure;
FIG. 5 is yet another schematic block diagram of an energy storage system according to an embodiment of the present disclosure;
FIG. 6 is yet another schematic block diagram of an energy storage system according to an embodiment of the present disclosure;
FIG. 7 is yet another schematic block diagram of an energy storage system according to an embodiment of the present disclosure;
fig. 8 is a flow chart of a method of storing energy using a stepped battery pack according to one embodiment of the present disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
Before describing in detail various embodiments in accordance with the present disclosure, the meanings of the terms used in the present disclosure will be explained first. The term "echelon battery pack" mainly refers to a power battery pack decommissioned from an electric vehicle and the like, and the term "used directly" mainly refers to that the power battery pack decommissioned from the electric vehicle and the like is not decomposed and recombined at all, but is directly applied to a certain system, such as an energy storage system. The expression "preset ac voltage" means an ac voltage that is preset in order to satisfy the requirement of consistency of the battery state parameters of the battery pack in a stepped manner.
Various embodiments according to the present disclosure are described in detail below.
Fig. 1 shows a schematic block diagram of an integrated power battery pack 10 according to an embodiment of the present disclosure, and as shown in fig. 1, the integrated power battery pack 10 includes a package body (not shown), a power battery module 101 disposed in the package body, and a voltage conversion module 102 integrated with the package body, wherein the voltage conversion module 102 is connected in series with the power battery module 101, and the voltage conversion module 102 is configured to convert a dc output voltage of the power battery module 101 into a preset ac voltage when the integrated power battery pack 10 is discharged.
The voltage conversion module 102 is integrated with the bag body, which means that the voltage conversion module 102 may be disposed in the bag body or may be fixed on an outer wall of the bag body. By power cell module 101 is meant that power cell module 101 may include a plurality of battery modules connected together in series and/or parallel.
By adopting the above technical scheme, since the voltage conversion module 102 can convert the dc output voltage of the power battery module 101 into the preset ac voltage when the integrated power battery pack 10 is discharged, the integrated power battery pack 10 configured as such can be directly applied to an energy storage system such as an energy storage power station without disassembly and reassembly after being decommissioned from an electric vehicle or the like, and it is not necessary to consider whether the battery state parameters such as voltage, capacity, electric quantity and the like of the decommissioned integrated power battery pack 10 have consistency or not, which greatly increases the flexibility of reuse, increases the design flexibility of the energy storage system to which the integrated power battery pack 10 is applied, and can meet different requirements of different customers. In addition, because the integrated power battery pack 10 does not need to be disassembled and recombined, compared with the prior art, the integrated power battery pack saves the cost and labor for reuse, reduces the screening difficulty, improves the social and economic benefits, retains the battery management system in the original integrated power battery pack 10, does not need to redevelop the battery management system applied to the energy storage system, can also provide the energy storage system with diversified configuration to meet different market demands and power grid voltages, and improves the market competitiveness and the customer satisfaction degree of energy storage products.
Preferably, the voltage conversion module 102 may also be used to convert the charging voltage input to the integrated power battery pack 10 into a voltage suitable for charging the power battery module 101 when the integrated power battery pack 10 is charged, so as to achieve convenient charging of the integrated power battery pack 10, simplify the structure of the integrated power battery pack 10, and reduce the volume of the integrated power battery pack 10.
Preferably, the voltage conversion module 102 may be a combination of a DC/DC conversion module and a DC/AC conversion module, in which case, the DC/DC conversion module is connected in series between the power battery module 101 and the DC/AC conversion module, and the DC/AC conversion module is connected to the DC/DC conversion module at one end and outputs the preset alternating voltage at the other end. Of course, the voltage conversion module 102 may also be a bidirectional vehicle-mounted charger. By configuring the voltage conversion module 102 in this way, the voltage conversion module 102 is enabled to directly convert the dc output voltage of the power battery module 101 into the preset ac voltage.
In addition, the DC/DC conversion module and the DC/AC conversion module are preferably a bidirectional DC/DC conversion module and a bidirectional DC/AC conversion module, respectively. In this way, in the case that the voltage conversion module 102 is a combination of a bidirectional DC/DC conversion module and a bidirectional DC/AC conversion module or a bidirectional vehicle-mounted charger, it is possible to charge the integrated power battery pack 10 by using the energy of the power grid, and also to convert the DC output voltage of the power battery module 101 into three-phase AC power such as 220V, so as to meet the power demand of the electric equipment charged by the commercial power, or to convert the DC output voltage of the power battery module 101 into single-phase AC power such as 380V, and then the single-phase AC power of 380V can be incorporated into the industrial power grid, so as to charge, for example, a pure electric bus. Moreover, the DC/DC conversion module, the DC/AC conversion module, the vehicle-mounted charger and the like all adopt a bidirectional structure, the topological structure of the integrated power battery pack 10 is simplified, and the volume of the integrated power battery pack 10 is reduced.
Fig. 2 shows another schematic block diagram of an integrated power cell package 10 according to one embodiment of the present disclosure. The integrated power battery pack 10 shown in fig. 2 is different from the integrated power battery pack 10 shown in fig. 1 in that a distribution box 103 is further disposed in the pack body of the integrated power battery pack 10, and is used for detecting the current of the bus of the power battery module 101 and controlling the operation of each contactor in the charging and discharging circuit when the power battery module 101 is charged and discharged. By adopting the distribution box 103, the use safety of the integrated power battery pack 10 can be enhanced.
Fig. 3 shows another schematic block diagram of the integrated power battery pack 10 according to an embodiment of the present disclosure, as shown in fig. 3, the power battery module 101 includes a battery control unit 1011, a plurality of battery modules 1012 and a plurality of battery management units 1013, the plurality of battery modules 1012 and the plurality of battery management units 1013 are in one-to-one correspondence, the battery management units 1013 are used for managing the battery modules 1012 corresponding to the battery modules, and the battery control unit 1011 is used for managing the power battery module 101.
Preferably, as shown in fig. 3, the enclosure of the integrated power battery pack 10 may include two cavities a and B, where the cavity a is used for accommodating a plurality of battery modules 1012 and a plurality of battery management units 1013, and the cavity B is used for accommodating a battery control unit 1011, a voltage conversion module 102 and a distribution box 103. By configuring the bag body in this way, the heat dissipation and the layout and wiring of the integrated power battery bag 10 are facilitated.
FIG. 4 shows a schematic block diagram of an energy storage system 1 according to an embodiment of the disclosure, and as shown in FIG. 4, the energy storage system 1 includes a plurality of echelon battery packs 110 connected in parallel 1 ～110 n The echelon battery pack is an integrated power battery pack 10 according to an embodiment of the present disclosure described in conjunction with fig. 1-3 that is used directly.
By adopting the above technical scheme, because the voltage conversion module 102 in the integrated power battery pack 10 can convert the voltage of the power battery module 101 in the integrated power battery pack 10 into the preset voltage when the energy storage system 1 discharges, when the integrated power battery pack 10 configured in this way is directly applied to the energy storage system 1 as a echelon battery pack, it is not necessary to consider whether the battery state parameters of the decommissioned integrated power battery pack 10, such as voltage, capacity, electric quantity, and the like, have consistency, which greatly increases the flexibility of the rescaling utilization, increases the design flexibility of the energy storage system 1, and can meet different requirements of different customers. In addition, because the integrated power battery pack 10 used as the echelon battery pack does not need to be disassembled and recombined, compared with the prior art, the integrated power battery pack saves the cost and labor for reusing echelons, reduces the screening difficulty, improves the social and economic benefits, also keeps the battery management system in the original integrated power battery pack 10, does not need to redevelop the battery management system applied to the energy storage system 1, can provide the energy storage system 1 with diversified configurations to meet different market demands and power grid voltages, and improves the market competitiveness and the customer satisfaction of energy storage products.
Fig. 5 shows a further schematic block diagram of the energy storage system 1 according to an embodiment of the present disclosure. As shown in fig. 5, except for the stepped battery pack 110 1 ～110 n The energy storage system 1 further comprises a switch cabinet 112 and a transformer 113, wherein a plurality of echelon battery packs 110 of the integrated power battery pack 10 that is directly used are adopted 1 ～110 n The parallel branch formed after parallel connection is sequentially connected with the switch cabinet 112 and the transformer 113 in series. The switch cabinet 112 is used for realizing relay protection and electric quantity metering during charging and discharging of the energy storage system 1. By so configuring the energy storage system 1, the energy storage system 1 can be incorporated into a power grid.
Further, as shown in fig. 5, a plurality of battery packs 110 are stepped 1 ～110 n The parallel branch formed after parallel connection is electrically connected with the switch cabinet 112 through an alternating current bus. Thus, when the energy storage system 1 is charged and discharged, the use of the plurality of echelon battery packs 110 of the directly used integrated power battery pack 10 can be realized according to a certain instruction 1 ～110 n Charging and discharging.
In addition, due to different specification parameters of the integrated power battery packs 10, the preset ac voltages that can be output by the integrated power battery packs 10 are different, for example, some integrated power battery packs 10 output 220V three-phase ac, and some integrated power battery packs 10 output 380V single-phase ac, so that when the integrated power battery packs 10 retired from an electric vehicle or the like are directly used as the echelon battery packs 110 1 ～110 n At the same time, the battery pack 110 is arranged in a ladder 1 ～110 n Intersection of outputsIn the case where the AC voltage specification of the consumer is not met by the DC voltage, such as in a stepped battery pack 110 1 ～110 n When the 220V three-phase alternating current is output and 380V single-phase alternating current is required by the electric equipment, the battery pack 110 needs to be subjected to echelon operation 1 ～110 n The phase angle of the alternating current output voltage is adjusted to obtain 380V single-phase alternating current to meet the requirements of electric equipment. Based on this idea, fig. 6 shows a further schematic block diagram of the energy storage system 1 according to an embodiment of the present disclosure.
As shown in fig. 6, the battery pack 110 is operated in a stepwise manner 1 ～110 n Under the condition that the output alternating voltage is the first preset alternating voltage and the alternating voltage required by the electric equipment is the second preset alternating voltage, the energy storage system 1 further comprises a plurality of phase angle adjusting modules 111, wherein the plurality of echelon battery packs 110 1 ～110 n The integrated power battery pack comprises a plurality of groups of integrated power battery packs which are directly used, each group of integrated power battery packs which are directly used comprises a plurality of integrated power battery packs which are directly used, each group of integrated power battery packs which are directly used are connected in parallel and then are connected in series with one phase angle adjusting module 111 to form a series branch, all the series branches are connected in parallel, the phase angle adjusting module 111 adjusts the phase angle of a first preset alternating voltage output by the integrated power battery packs which are directly used and connected with the phase angle adjusting module to enable all the series branches to output a second preset alternating voltage, and therefore the requirement of electric equipment for the second preset alternating voltage is met.
The following description will take an example in which the first predetermined ac voltage is 220V three-phase ac and the second predetermined ac voltage is 380V single-phase ac. First, a plurality of battery packs 110 are stepped 1 ～110 n The three battery packs are divided into a plurality of groups according to a three-group mode, then three echelon battery packs in each group are connected in parallel and then are connected with one phase angle adjusting module 111 in series, so that the phase angle adjusting module 111 performs phase angle adjustment on 220V three-phase alternating current output by the three echelon battery packs connected in parallel to obtain 380V single-phase alternating current, and therefore electricity utilization can be metThe requirement of the device for 380V single-phase alternating current. Conversely, if the ac output voltage of the battery packs in multiple steps is 380V single-phase ac, and the electric device needs 220V three-phase ac, the phase angle adjustment module 111 can also perform similar phase angle adjustment to meet the requirement. By using the phase angle adjusting module 111, the energy storage system 1 can be applied to both the commercial power supply place and the industrial power place.
Fig. 7 shows another schematic block diagram of the energy storage system 1 according to an embodiment of the disclosure, in which the energy storage system 1 shown in fig. 7 is obtained by adding a switch cabinet 112 and a transformer 113 to the energy storage system 1 shown in fig. 6, wherein a plurality of phase angle adjusting modules 111 are connected in parallel and then connected in series with the switch cabinet 112 and the transformer 113 in sequence. The switch cabinet 113 is used for realizing relay protection and electric quantity metering during charging and discharging of the energy storage system 1. By so configuring the energy storage system 1, the energy storage system 1 shown in fig. 7 can be incorporated into a power grid.
In fig. 7, a plurality of phase angle adjusting modules 111 are connected in parallel and then electrically connected to the switch cabinet 112 through an ac bus. Thus, when the energy storage system 1 is charged and discharged, a plurality of battery packs 110 in steps can be realized according to a certain command 1 ～110 n Charging and discharging.
Preferably, in the present disclosure, the switch cabinet 112 may be a low-voltage switch cabinet or a high-voltage switch cabinet, preferably a low-voltage switch cabinet.
Preferably, a plurality of battery packs 110 in steps 1 ～110 n The number of battery packs depends on the performance requirements of the energy storage system 1 and the performance parameters of each battery pack. The following description will take the voltage conversion module 102 in the echelon battery pack as an example of a bidirectional vehicle charger.
The specification parameters of the integrated power cell package that are directly used include, but are not limited to, rated voltage (given by the original manufacturer, e.g., 3.2V/cell number), rated capacity (given by the original manufacturer, e.g., 25 Ah), rated energy (rated energy = rated voltage rated capacity). The specification parameters of the bidirectional vehicle-mounted charger include, but are not limited to, rated power. The specification parameters of the energy storage system 1 include, but are not limited to, a rated output voltage, a rated power, a rated stored electricity amount, and a system duration. The number N of a plurality of parallel integrated power cell packs used directly is thus determined by:
n = rated power (kW) of energy storage system 1/rated power (kW) of bidirectional vehicle charger
The discharging process and the charging process of the energy storage system 1 according to the embodiment of the disclosure are described below by way of example with reference to the topology of the energy storage system 1 shown in fig. 6 and taking the voltage conversion module 102 in the integrated power battery pack 10 as a bidirectional vehicle-mounted charger.
The discharge process is described first. Firstly, the bidirectional vehicle-mounted charger in the directly used integrated power battery pack 10 used as the echelon battery pack 110 converts the dc output voltage of the power battery modules in the integrated power battery pack into a preset ac voltage, and then the converted preset ac voltage is transmitted to the switch cabinet 112 through the ac bus, and is output to the electric equipment after the relay protection and electric quantity metering processing of the switch cabinet 112 and the voltage conversion processing of the transformer 113 in a certain proportion. In this way, the energy storage system 1 is able to carry out the discharge process.
The charging process is then described. Firstly, charging alternating-current voltage (such as charging alternating-current voltage from a power grid) is subjected to voltage transformation of a certain proportion of a transformer 113 and relay protection and electric quantity metering processing of a switch cabinet 112, and then is transmitted to a bidirectional vehicle-mounted charger in a directly used integrated power battery pack through an alternating-current bus according to a certain instruction; then, the bidirectional vehicle-mounted charger converts the received alternating-current voltage into a direct-current charging voltage suitable for charging the power battery modules connected in series with the bidirectional vehicle-mounted charger. The energy storage system 1 is thus able to carry out a charging process.
Fig. 8 shows a flow chart of a method for storing energy using a stepped battery pack according to an embodiment of the present disclosure, wherein the stepped battery pack is the integrated power battery pack 10 according to the embodiment of the present disclosure described in conjunction with fig. 1 to 3. As shown in fig. 8, the method includes:
in step S801, in a plurality of integrated power battery packs connected in parallel, a voltage conversion module integrated with a pack body of the integrated power battery pack receives a dc output voltage of a power battery module disposed in the pack body of the same integrated power battery pack;
in step S802, the voltage conversion modules in the multiple parallel integrated power battery packs each convert the received dc output voltage into a preset ac voltage.
By adopting the above technical scheme, since the voltage conversion module 102 in the integrated power battery pack 10 can convert the dc output voltage of the power battery module 101 in the integrated power battery pack 10 into the preset ac voltage, when the integrated power battery pack 10 configured in this way is directly used for energy storage as a echelon battery pack, it is not necessary to consider whether the battery state parameters of the retired integrated power battery pack 10, such as voltage, capacity, and electric quantity, have consistency, which greatly increases the flexibility of the new echelon utilization and can meet different requirements of different customers. In addition, as the decommissioned integrated power battery pack 10 does not need to be disassembled and recombined, compared with the prior art, the cost and labor for reuse are saved, the screening difficulty is reduced, the social and economic benefits are improved, a battery management system in the original integrated power battery pack 10 is reserved, the battery management system applied to an energy storage system does not need to be redeveloped, and the market competitiveness and the customer satisfaction degree of energy storage products are improved.
Specific implementation manners of operations involved in each step in the method for storing energy by using a stepped battery pack according to the embodiment of the present disclosure have been described in detail in the embodiment of the energy storage system 1 according to the embodiment of the present disclosure, and are not described herein again.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure as long as it does not depart from the gist of the present disclosure.
Claims (15)
1. An energy storage system is characterized by comprising a plurality of parallel echelon battery packs, wherein each echelon battery pack is an integrated power battery pack which is directly used, each integrated power battery pack comprises a pack body, a power battery module and a voltage conversion module, the power battery modules are arranged in the pack body, the voltage conversion modules are integrated with the pack body, the voltage conversion modules are connected with the power battery modules in series, and the voltage conversion modules are used for converting direct-current output voltages of the power battery modules into preset alternating-current voltages when the integrated power battery packs are discharged;
the preset alternating voltage is a first preset alternating voltage, the echelon battery pack comprises a plurality of groups of integrated power battery packs which are directly used, each group of integrated power battery packs is directly used and comprises a plurality of integrated power battery packs which are directly used, the energy storage system further comprises a plurality of phase angle adjusting modules, each group of integrated power battery packs which are directly used are connected in parallel and then connected in series with one of the phase angle adjusting modules to form a series branch, all the series branches are connected in parallel, and the phase angle adjusting modules adjust the phase angles of the first preset alternating voltage output by the integrated power battery packs which are directly used and connected with the phase angle adjusting modules to enable all the series branches to output a second preset alternating voltage.
2. The energy storage system of claim 1, wherein the voltage conversion module is further configured to convert a charging voltage input to the integrated power battery pack into a voltage suitable for charging the power battery module when the integrated power battery pack is charged.
3. The energy storage system of claim 1, wherein the voltage conversion module is a combination of a DC/DC conversion module and a DC/AC conversion module or a bidirectional vehicle-mounted charger, wherein the DC/DC conversion module is connected in series between the power battery module and the DC/AC conversion module, one end of the DC/AC conversion module is connected to the DC/DC conversion module, and the other end of the DC/AC conversion module outputs the preset alternating voltage.
4. The energy storage system of claim 3, wherein the DC/DC conversion module and the DC/AC conversion module are a bidirectional DC/DC conversion module and a bidirectional DC/AC conversion module, respectively.
5. The energy storage system according to any one of claims 1 to 4, wherein a distribution box is further arranged in the package body, and is used for detecting the current of the bus of the power battery module and controlling the action of each contactor in the charge-discharge loop to be executed when the integrated power battery package is charged and discharged.
6. The energy storage system of claim 1, wherein the voltage conversion module is disposed within the enclosure or secured to an outer wall of the enclosure.
7. The energy storage system of claim 1, wherein the power battery module comprises a plurality of battery modules connected together in series and/or parallel.
8. The energy storage system of claim 5, wherein the power battery module comprises a battery control unit, a plurality of battery modules and a plurality of battery management units, the plurality of battery modules and the plurality of battery management units are in one-to-one correspondence, the battery management units are configured to manage the battery modules corresponding to the battery management units, and the battery control unit is configured to manage the power battery module.
9. The energy storage system of claim 8, wherein the enclosure comprises two cavities, one of the cavities is configured to house the plurality of battery modules and the plurality of battery management units, and the other cavity is configured to house the battery control unit, the voltage conversion module, and the power distribution box.
10. The energy storage system of claim 1, further comprising a switch cabinet and a transformer, wherein a parallel branch formed by connecting a plurality of the echelon battery packs in parallel is sequentially connected in series with the switch cabinet and the transformer.
11. The energy storage system of claim 1, further comprising a switch cabinet and a transformer, wherein all the series branches are connected in parallel to form a parallel branch, and the parallel branch is sequentially connected in series with the switch cabinet and the transformer.
12. The energy storage system of claim 10 or 11, wherein the parallel branches are electrically connected to the switchgear through an ac bus.
13. The energy storage system of claim 10 or 11, wherein the switchgear is a low voltage switchgear.
14. The energy storage system of claim 10 or 11, wherein the switch cabinet is used for realizing relay protection and electric quantity metering during charging and discharging of the energy storage system.
15. A method of storing energy using an energy storage system according to any one of claims 1 to 14, the method comprising:
in a plurality of parallel-connected integrated power battery packs, a voltage conversion module integrated with a pack body of the integrated power battery pack receives direct-current output voltage of a power battery module arranged in the pack body of the same integrated power battery pack;
the voltage conversion modules in the plurality of parallel integrated power battery packs convert the received direct current output voltage into a preset alternating current voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246425.9A CN110299733B (en) | 2018-03-23 | 2018-03-23 | Integrated power battery pack, energy storage system and method for storing energy by using echelon battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246425.9A CN110299733B (en) | 2018-03-23 | 2018-03-23 | Integrated power battery pack, energy storage system and method for storing energy by using echelon battery pack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110299733A CN110299733A (en) | 2019-10-01 |
| CN110299733B true CN110299733B (en) | 2023-04-07 |
Family
ID=68025946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810246425.9A Active CN110299733B (en) | 2018-03-23 | 2018-03-23 | Integrated power battery pack, energy storage system and method for storing energy by using echelon battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110299733B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115863792A (en) * | 2022-11-24 | 2023-03-28 | 如果新能源科技(江苏)股份有限公司 | Configuration method of battery system and electronic terminal equipment |
| CN116674425B (en) * | 2023-06-07 | 2023-12-01 | 湖南文理学院 | Coordinated control method and system for power battery pack based on total amount consistency |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205081480U (en) * | 2015-09-17 | 2016-03-09 | 比亚迪股份有限公司 | Battery energy storage system |
| CN106849368A (en) * | 2016-10-25 | 2017-06-13 | 蔚来汽车有限公司 | Modularization energy-accumulating power station based on echelon battery |
| CN206293926U (en) * | 2016-12-19 | 2017-06-30 | 西京学院 | A kind of echelon utilizes the control system of retired electrokinetic cell |
| CN106936149A (en) * | 2017-04-19 | 2017-07-07 | 上海蔚来汽车有限公司 | Chain type energy storage device and energy-accumulating power station |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7408794B2 (en) * | 2006-02-21 | 2008-08-05 | Ut-Battele Llc | Triple voltage dc-to-dc converter and method |
-
2018
- 2018-03-23 CN CN201810246425.9A patent/CN110299733B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205081480U (en) * | 2015-09-17 | 2016-03-09 | 比亚迪股份有限公司 | Battery energy storage system |
| CN106849368A (en) * | 2016-10-25 | 2017-06-13 | 蔚来汽车有限公司 | Modularization energy-accumulating power station based on echelon battery |
| CN206293926U (en) * | 2016-12-19 | 2017-06-30 | 西京学院 | A kind of echelon utilizes the control system of retired electrokinetic cell |
| CN106936149A (en) * | 2017-04-19 | 2017-07-07 | 上海蔚来汽车有限公司 | Chain type energy storage device and energy-accumulating power station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110299733A (en) | 2019-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20190168632A1 (en) | Electric-vehicle energy management system, control method thereof, and electric vehicle | |
| DK2496436T3 (en) | ELECTRIC VEHICLE CHARGING SYSTEM | |
| US9899835B2 (en) | Uninterruptible power supply system | |
| CN103580214B (en) | Charging device and method of operation thereof | |
| Hõimoja et al. | An ultrafast EV charging station demonstrator | |
| NL2005026C2 (en) | Charger for a battery, plurality of coupled chargers and method of operating. | |
| KR101836230B1 (en) | System and method ofoperating variable voltage for DC micro-grid | |
| US20120019203A1 (en) | Energy storage and vehicle charging system and method of operation | |
| CN113270881A (en) | Energy storage system, balance control method of energy storage system and photovoltaic power generation system | |
| CN107968446B (en) | Distributed battery pack power supply system and charge-discharge control method | |
| US11799140B2 (en) | Controller for energy storage, system comprising the same, and methods of using the same | |
| CN109786866B (en) | Plug-and-play battery module and battery energy storage system | |
| CN107303825A (en) | For the charging system of electric vehicle and for the method to electric vehicle charging | |
| EP3846304A1 (en) | Portable charging device for electric vehicles | |
| CN107681758A (en) | Compound energy system | |
| CN110299733B (en) | Integrated power battery pack, energy storage system and method for storing energy by using echelon battery pack | |
| EP4112362A1 (en) | Terminal for charging electric vehicles with electrochemical energy storage | |
| CN117996737A (en) | Micro-grid electrical architecture and micro-grid working method | |
| CN117937664A (en) | Charging system and charging method | |
| CN218678462U (en) | Energy storage converter, energy storage system and new energy power generation system | |
| CN214703922U (en) | Energy storage system test platform | |
| CN105529746B (en) | A kind of flexibility distribution system | |
| Korõtko et al. | Analysis and development of protection and control functions for Li-Ion based prosumers provided by low voltage part of distribution substation | |
| CN220342044U (en) | Energy storage control management system and energy storage container | |
| CN218005970U (en) | Energy storage system and equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |