CN216056382U - Battery energy storage system - Google Patents
Battery energy storage system Download PDFInfo
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- CN216056382U CN216056382U CN202121855214.9U CN202121855214U CN216056382U CN 216056382 U CN216056382 U CN 216056382U CN 202121855214 U CN202121855214 U CN 202121855214U CN 216056382 U CN216056382 U CN 216056382U
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Abstract
The utility model discloses a battery energy storage system which comprises at least one battery energy storage unit, DCDC converters in one-to-one correspondence with the battery energy storage units, first bypass switches and second bypass switches in one-to-one correspondence with the DCDC converters, wherein the battery energy storage units are connected to a direct current bus of the battery energy storage system through the corresponding DCDC converters, the first bypass switches are connected between positive input ends and positive output ends of the corresponding DCDC converters, and the second bypass switches are connected between positive output ends and negative output ends of the corresponding DCDC converters.
Description
Technical Field
The utility model relates to the technical field of circuit design, in particular to a battery energy storage system.
Background
In recent years, the new energy industry has been developed and is growing, wherein the battery energy storage system is an indispensable part in the new energy industry, the technical development of the battery energy storage system is the most rapid, and more battery energy storage systems are produced at the same time.
Due to the limited voltage and capacity of the single battery, the batteries are usually connected in series or in parallel to form a battery module in practical application. In order to obtain a larger capacity battery energy storage system, it is often necessary to form a large capacity battery energy storage system by connecting battery modules in series or in parallel, as shown in fig. 1 and 2. The battery energy storage system has the advantages that as the service life of the battery is prolonged, the battery modules are aged, the capacity of the battery modules is slowly different, and the performance of the battery energy storage system is reduced or even damaged.
In order to solve the problem, a DCDC converter is often added to the output side of the battery in the conventional battery energy storage system, as shown in fig. 3 and 4. In the battery energy storage system shown in fig. 3, when the capacities of the batteries are different and the voltages output by the batteries are inconsistent, the voltages output to the bus by the DCDC converter battery can be kept consistent, so that internal circulation is avoided, and the operation reliability of the battery energy storage system is ensured. In the battery energy storage system shown in fig. 4, when the capacities of the battery modules are different, the output voltage of the battery modules can be adjusted through the DCDC converter, so that the charging/discharging rate is changed, the barrel effect is avoided, each battery module can be fully charged or emptied at the same time, and the effective capacity of the battery energy storage system is improved.
Although the technology solves the problem that the performance of the battery energy storage system is reduced when the capacity of the battery module or a single battery is attenuated, the utilization rate of the battery can be improved to a certain extent in the aspect of utilizing the echelon battery, however, when the battery module is connected with a DCDC converter in an output test, the charging and discharging efficiency of the whole battery energy storage system is reduced due to the loss problem of the DCDC converter.
In addition, in the battery energy storage system formed by serially connecting the battery modules, when a certain battery module or a certain DCDC converter breaks down, the whole battery energy storage system cannot work, and the operation reliability of the battery energy storage system is greatly reduced.
Disclosure of Invention
An object of the present invention is to provide a battery energy storage system capable of individually switching a battery energy storage unit or a DCDC converter in the battery energy storage system.
According to one aspect of the utility model, a battery energy storage system is provided, which includes at least one battery energy storage unit, DCDC converters corresponding to the battery energy storage units one by one, and first bypass switches and second bypass switches corresponding to the DCDC converters one by one, wherein the battery energy storage units are connected to a dc bus of the battery energy storage system through the corresponding DCDC converters, the first bypass switches are connected between a positive input end and a positive output end of the corresponding DCDC converters, and the second bypass switches are connected between a positive output end and a negative output end of the corresponding DCDC converters.
Optionally, the positive electrode of the battery energy storage unit is connected to the positive electrode input end of the corresponding DCDC converter, the negative electrode of the battery energy storage unit is connected to the negative electrode input end of the corresponding DCDC converter, and the positive electrode output end and the negative electrode output end of at least one DCDC converter are connected to the dc bus in series or in parallel.
Optionally, the battery energy storage system further includes a battery manager, and the battery manager is configured to control the switching states of the first bypass switch and the second bypass switch respectively.
Optionally, the battery energy storage system further includes a battery controller in one-to-one correspondence with the battery energy storage units, the battery manager further has a first input end in one-to-one correspondence with the battery controller, the first input end is connected with an output end of the corresponding battery controller, the battery controller is set to collect first information of the corresponding battery energy storage units, and transmits the first information to the battery manager.
Optionally, the first information includes at least one of a state of charge, an output voltage, and an output current.
Optionally, the battery energy storage system further includes a DCDC controller in one-to-one correspondence with the DCDC converter, the battery manager further has a second input end in one-to-one correspondence with the DCDC controller, the second input end is connected to an output end of the corresponding DCDC controller, and the DCDC controller is configured to acquire second information of the corresponding DCDC converter and transmit the second information to the battery manager.
Optionally, the second information includes at least one of an input voltage, an input current, an input power, an output voltage, an output current, and an output power.
Optionally, the battery manager is configured to determine whether the battery energy storage unit fails according to the first information, and control a second bypass switch corresponding to the failed battery energy storage unit to be closed when any one of the battery energy storage units fails.
Optionally, the battery manager is configured to determine whether the DCDC converters need to be put into the battery energy storage system according to the first information, and control, when any of the DCDC converters does not need to be put into the battery energy storage system, to close a first bypass switch corresponding to the DCDC converter that does not need to be put into the battery energy storage system.
Optionally, the battery manager is configured to determine whether the DCDC converters have a fault according to the second information, and control the first bypass switch corresponding to the faulty DCDC converter to be closed when any one of the DCDC converters has a fault.
Optionally, the battery manager is configured to determine whether a difference of output voltages of the battery energy storage units is greater than a preset voltage threshold according to the first information, and control the first bypass switch corresponding to the battery energy storage unit to be turned off when it is determined that the difference of the output voltages is greater than the voltage threshold.
The utility model has the technical effects that through the embodiment of the disclosure, the independent switching of the corresponding DCDC converter in the battery energy storage system can be realized by controlling the first bypass switch; and the second bypass switch can be controlled to realize the independent switching of the corresponding battery energy storage unit and the corresponding DCDC converter in the battery energy storage system.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.
FIG. 1 is a circuit schematic of a first example of a prior art battery energy storage system;
FIG. 2 is a circuit schematic of a second example of a battery energy storage system according to the prior art;
FIG. 3 is a circuit schematic of a third example of a battery energy storage system according to the prior art;
FIG. 4 is a circuit schematic of a fourth example of a battery energy storage system according to the prior art;
FIG. 5 is a functional block diagram of a battery energy storage system according to an embodiment of the present invention;
FIG. 6 is a circuit schematic of one example of a battery energy storage system according to an embodiment of the utility model;
FIG. 7 is a circuit schematic of another example of a battery energy storage system according to an embodiment of the utility model;
fig. 8 is a circuit schematic of an equivalent circuit of a first example of a battery energy storage system according to an embodiment of the utility model;
fig. 9 is a circuit schematic of an equivalent circuit of a second example of a battery energy storage system according to an embodiment of the utility model;
fig. 10 is a circuit schematic of an equivalent circuit of a third example of a battery energy storage system according to an embodiment of the utility model.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The present disclosure provides a battery energy storage system. Fig. 5 is a functional block diagram of a battery energy storage system according to an embodiment of the present invention.
As shown in fig. 5, the battery energy storage system 5000 may include at least one battery energy storage unit 5100, DCDC converters 5200 corresponding to the battery energy storage units 5100 one to one, and first and second bypass switches S1 and S2 corresponding to the DCDC converters 5200 one to one. Specifically, for each DCDC converter 5200, there are a first bypass switch S1 in one-to-one correspondence therewith and a second bypass switch S2 in one-to-one correspondence therewith.
The at least one battery energy storage unit 5100 may be connected to a dc bus of the battery energy storage system 5000 via a corresponding DCDC converter 5200.
IN this embodiment, the DCDC converter 5200 may be a dc converter having a positive input terminal IN +, a negative input terminal IN-, a positive output terminal OUT +, and a negative output terminal OUT-. The positive pole of the battery energy storage unit 5100 can be connected with the positive pole input end IN + of the corresponding DCDC converter 5200, and the negative pole of the battery energy storage unit 5100 is connected with the negative pole input end IN-of the corresponding DCDC converter 5200.
The first bypass switch S1 is connected between the positive input terminal IN + and the positive output terminal OUT + of the corresponding DCDC converter 5200, and the second bypass switch S2 is connected between the positive output terminal OUT + and the negative output terminal OUT-of the corresponding DCDC converter 5200.
IN this embodiment, when the first bypass switches S1 are all IN the off state, if it is detected that one of the DCDC converters 5200 has a fault, the corresponding first bypass switch S1 may be controlled to be turned on, so that the positive input terminal IN + and the positive output terminal OUT + of the DCDC converter 5200 are shorted, so as to cut the DCDC converter 5200 from the battery energy storage system, thereby achieving the isolation of the faulty DCDC converter, and improving the reliability of the battery energy storage system.
Under the condition that one of the DCDC converters 5200 is not required to adjust the corresponding battery energy storage unit 5100, the corresponding first bypass switch S1 can be controlled to be turned on, so that the positive input end IN + and the positive output end OUT + of the DCDC converter 5200 are short-circuited, and the DCDC converter 5200 is cut off from the battery energy storage system, thereby reducing the energy loss of the battery energy storage system and improving the charging and discharging efficiency of the battery energy storage system.
Under the condition that the second bypass switches S2 are both in the off state, if it is detected that one of the battery energy storage units 5100 has a fault, the corresponding second bypass switch S2 may be controlled to be turned on, so that a short circuit occurs between the positive output end OUT + and the negative output end OUT-of the corresponding DCDC converter 5200, so as to cut the battery energy storage unit 5100 and the corresponding DCDC converter 5200 from the battery energy storage system, thereby achieving isolation of the faulty battery energy storage unit, and improving reliability of the battery energy storage system.
According to the embodiment of the disclosure, the independent switching of the corresponding DCDC converter in the battery energy storage system can be realized by controlling the first bypass switch; and the second bypass switch can be controlled to realize the independent switching of the corresponding battery energy storage unit and the corresponding DCDC converter in the battery energy storage system.
In this embodiment, the first bypass switch S1 may be a power switch or a fet, and the second bypass switch S2 may also be a power switch or a fet.
Further, the battery energy storage unit 5100 in this embodiment may be a single battery, a battery module, or a battery pack. At least one battery energy storage unit included in the battery energy storage system is of the same type.
In one embodiment of the present disclosure, at least one battery energy storage unit 5100 may be connected in series to the dc bus of the battery energy storage system 5000 through a corresponding DCDC converter 5200, and may be connected in parallel to the dc bus of the battery energy storage system 5000.
In the embodiment where at least one of the battery energy storage units 5100 is connected in series to the dc bus of the battery energy storage system 5000 through the corresponding DCDC converter 5200, the positive output terminal OUT + and the negative output terminal OUT-of the DCDC converter 5200 are connected in series to the dc bus, which may be specifically as shown in fig. 6.
IN the case that the battery energy storage system 5000 includes N battery energy storage units 5100, the positive electrode of the ith battery energy storage unit 5100 is connected to the positive electrode input terminal IN + of the ith DCDC converter 5200, the negative electrode of the ith battery energy storage unit 5100 is connected to the negative electrode input terminal IN-of the ith DCDC converter 5200, the positive electrode output terminal OUT + of the 1 st DCDC converter 5200 is connected to the positive electrode of the dc bus, the negative electrode output terminal OUT-of the ith DCDC converter 5200 is connected to the positive electrode output terminal OUT + of the i +1 th DCDC converter 5200, and the negative electrode output terminal OUT-of the nth DCDC converter 5200 is connected to the negative electrode of the dc bus. Wherein i is a positive integer less than N, and N is a positive integer greater than or equal to 1.
In the embodiment where at least one battery energy storage unit 5100 is connected in parallel to the dc bus of the battery energy storage system 5000 through the corresponding DCDC converter 5200, the positive output terminal OUT + and the negative output terminal OUT-of the DCDC converter 5200 are connected in parallel to the dc bus, which may be specifically as shown in fig. 7.
IN the case that the battery energy storage system 5000 includes N battery energy storage units 5100, the positive electrode of the jth battery energy storage unit 5100 is connected to the positive electrode input terminal IN + of the jth DCDC converter 5200, the negative electrode of the jth battery energy storage unit 5100 is connected to the negative electrode input terminal IN-of the jth DCDC converter 5200, the positive electrode output terminal OUT + of the jth DCDC converter 5200 is connected to the positive electrode of the dc bus, and the negative electrode output terminal OUT-of the jth DCDC converter 5200 is connected to the negative electrode of the dc bus. Wherein j is a positive integer less than or equal to N, and N is a positive integer greater than or equal to 1.
In one embodiment of the present disclosure, as shown in fig. 6 and 7, the battery energy storage system 5000 may further include a battery manager 5300, and the battery manager 5300 may be configured to individually control the switching state of each first bypass switch S1 and the switching state of each second bypass switch S2.
In one example, the battery manager 5300 may have a first output terminal corresponding to the first bypass switch S1 and a second output terminal corresponding to the second bypass switch S2, the first output terminal being connected to a control terminal of the corresponding first bypass switch S1, and the second output terminal being connected to a control terminal of the corresponding second bypass switch S2.
In this way, the switching state of each first bypass switch and each second bypass switch can be individually controlled by the control signals output from the first output terminal and the second output terminal through the battery manager 5300.
In one embodiment of the present disclosure, as shown in fig. 6 and 7, the battery energy storage system 5000 may further include a battery controller 5400 in one-to-one correspondence with the battery energy storage units 5100, and the battery controller 5400 is configured to collect first information of the corresponding battery energy storage units 5100 and transmit the first information to the battery manager 5300, so that the battery manager 5300 controls the switching states of each first bypass switch and each second bypass switch S2 according to the first information.
In this embodiment, the first information may include at least one of a state of charge, an output voltage, and an output current.
Specifically, the battery manager 5300 may further have a first input terminal corresponding to the battery controller 5400 one to one, and the first input terminal of the battery manager 5300 may be connected to an output terminal of the corresponding battery controller 5400.
Under the condition that the capacities of the battery energy storage units in the battery energy storage system are normal, the difference of the output voltages of the battery energy storage units is smaller than or equal to the preset voltage threshold, and the first bypass switch S1 corresponding to the battery energy storage units can be in a conducting state, namely, a DCDC converter corresponding to each battery energy storage unit is not required to be arranged in the battery energy storage system, so that the loss of the battery energy storage system is reduced, and the charging and discharging efficiency of the battery energy storage system is improved.
After the battery energy storage system operates for years, the capacity of the battery energy storage units is attenuated, and due to the wooden barrel effect, the battery energy storage units can not continue to work even if other battery energy storage units can be charged and discharged when one of the battery energy storage units is full or empty. The battery manager can lock the battery energy storage unit with abnormal charge and discharge rate by collecting the first information collected by each battery controller. At this moment, the battery manager controls the corresponding first bypass switch S1 to be switched off, so that the DCDC converter corresponding to the abnormal battery energy storage unit is put into the battery energy storage system, the output voltage Uin of the battery energy storage unit is adjusted, the output power of the battery energy storage unit is changed, the charging and discharging rate of the battery energy storage unit is slowed down or accelerated, the battery energy storage units of the whole battery energy storage system can be fully charged or emptied at the same time, and the effective capacity of the whole system is improved.
When the output power of the corresponding battery energy storage unit does not need to be readjusted by the corresponding DCDC converter, the battery manager may control the corresponding first bypass switch S1 to be closed, so that the corresponding DCDC converter is cut off from the entire battery energy storage system, and fig. 8 and 9 are equivalent circuits after closing the bypass switch S1. At the moment, the battery energy storage unit is directly connected to a system direct current bus, and the loss of the whole battery energy storage system can be reduced and the charging and discharging efficiency of the battery energy storage system can be improved due to the fact that the loss of the DCDC converter is avoided.
In the embodiment where the battery energy storage units 5100 are connected in series to the dc bus of the battery energy storage system 5000 through the corresponding DCDC converters 5200, when the battery manager determines that a battery energy storage unit in the battery energy storage system has a fault or needs to be cut off from the battery energy storage system according to the first information, the battery manager may control the corresponding second bypass switch S2 to be closed, so as to cut off the battery energy storage unit from the entire battery energy storage system, and fig. 10 is an equivalent circuit after closing the bypass switch S2. Therefore, the number of the battery modules connected in series in the system can be allocated in real time, the failed battery modules are isolated, and the system is accurately managed.
In an embodiment of the present disclosure, as shown in fig. 6 and 7, the battery energy storage system 5000 may further include a DCDC controller 5500 in one-to-one correspondence with the DCDC converters 5200, and the DCDC controller 5500 is configured to collect second information of the corresponding DCDC converters 5200 and transmit the second information to the battery manager 5300, so that the battery manager 5300 also controls the switching state of each first bypass switch and each second bypass switch S2 according to the second information.
In the present embodiment, the second information may include at least one of an input voltage, an input current, an input power, an output voltage, an output current, and an output power.
Specifically, the battery manager 5300 may further have a second input terminal corresponding to the DCDC controller 5500, and the second input terminal of the battery manager 5300 may be connected to the output terminal of the corresponding DCDC controller 5500.
Based on this embodiment, the battery manager 5300 may further have a third output terminal corresponding to the DCDC controller 5500, and the third output terminal is connected to the input terminal of the corresponding DCDC controller 5500.
The battery manager 5300 may output a control command for controlling the switching states of the corresponding first bypass switch S1 and second bypass switch S2 to each DCDC controller 5500, and the DCDC controller 5500 may control the switching states of the corresponding first bypass switch S1 and second bypass switch S2 according to the received control command.
Due to the characteristics of the battery energy storage units, the output voltage may not be consistent between the battery energy storage units when the battery energy storage units are in the initial stage and the final stage of charging and discharging. Or, after the battery energy storage system operates for many years, capacity attenuation occurs in the battery energy storage units, and the output voltage deviation between the battery energy storage units is increased. The first information is collected through the battery controller, the second information is collected through the DCDC controller, the output voltage Uin of each battery energy storage unit is compared, when the difference between the first information and the second information exceeds a preset voltage threshold value, the battery energy storage units need to be balanced, the battery manager controls the first bypass switch S1 to be switched off, the DCDC converter is enabled to be put into the battery energy storage system, the voltage Uout output to the direct current bus by the battery energy storage units is adjusted to be consistent, and the phenomenon that internal circulation current damages the whole battery energy storage system is avoided. When the voltage output by the battery energy storage unit to the bus needs not to be regulated by any one of the DCDC converters (for example, during a charging and discharging platform period of the battery energy storage unit), that is, when the DCDC converter is wirelessly put into the battery energy storage system, the battery manager may control the corresponding first bypass switch S1 to be closed, and cut off the corresponding DCDC converter from the entire battery energy storage system, where fig. 8 and 9 are equivalent circuits after closing the first bypass switch S1. At the moment, the battery energy storage unit is directly output to a system direct current bus, and the loss of the whole battery energy storage system can be reduced and the charging and discharging efficiency is improved due to the fact that the loss of the DCDC converter is avoided.
Specifically, in the embodiment that the battery energy storage unit 5100 may be connected to the dc bus of the battery energy storage system 5000 in series or in parallel through the corresponding DCDC converter 5200, the corresponding DCDC converter may be switched separately through the first bypass switch S1 of the battery manager, and when the battery energy storage system monitors that a certain DCDC converter fails, the corresponding first bypass switch S1 may be directly controlled to be closed to isolate the failed DCDC converter.
The above embodiments mainly focus on differences from other embodiments, but it should be clear to those skilled in the art that the above embodiments can be used alone or in combination with each other as needed.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.
Claims (11)
1. The battery energy storage system is characterized by comprising at least one battery energy storage unit, DCDC converters in one-to-one correspondence with the battery energy storage units, first bypass switches and second bypass switches in one-to-one correspondence with the DCDC converters, wherein the battery energy storage units are connected to a direct current bus of the battery energy storage system through the corresponding DCDC converters, the first bypass switches are connected between positive input ends and positive output ends of the corresponding DCDC converters, and the second bypass switches are connected between positive output ends and negative output ends of the corresponding DCDC converters.
2. The battery energy storage system of claim 1, wherein the positive pole of the battery energy storage unit is connected to the positive pole input terminal of the corresponding DCDC converter, the negative pole of the battery energy storage unit is connected to the negative pole input terminal of the corresponding DCDC converter, and the positive pole output terminal and the negative pole output terminal of at least one DCDC converter are connected to the DC bus in series or in parallel.
3. The battery energy storage system of claim 1, further comprising a battery manager configured to control the switching states of the first and second bypass switches, respectively.
4. The battery energy storage system of claim 3, further comprising battery controllers in one-to-one correspondence with the battery energy storage cells, wherein the battery manager further has first input terminals in one-to-one correspondence with the battery controllers, the first input terminals being connected with output terminals of the corresponding battery controllers, and wherein the battery controllers are configured to collect first information of the corresponding battery energy storage cells and transmit the first information to the battery manager.
5. The battery energy storage system of claim 4, wherein the first information comprises at least one of a state of charge, an output voltage, and an output current.
6. The battery energy storage system of claim 3, further comprising a DCDC controller in one-to-one correspondence with the DCDC converter, wherein the battery manager further has a second input in one-to-one correspondence with the DCDC controller, the second input being connected to an output of the corresponding DCDC controller, and wherein the DCDC controller is configured to collect second information of the corresponding DCDC converter and transmit the second information to the battery manager.
7. The battery energy storage system of claim 6, wherein the second information comprises at least one of an input voltage, an input current, an input power, an output voltage, an output current, and an output power.
8. The battery energy storage system of claim 4, wherein the battery manager is configured to determine whether the battery energy storage units are faulty according to the first information, and control the second bypass switch corresponding to the faulty battery energy storage unit to be closed when any one of the battery energy storage units is faulty.
9. The battery energy storage system of claim 4, wherein the battery manager is configured to determine whether the DCDC converters need to be put into the battery energy storage system according to the first information, and control the first bypass switches corresponding to the DCDC converters that do not need to be put into the battery energy storage system to be closed if any of the DCDC converters does not need to be put into the battery energy storage system.
10. The battery energy storage system of claim 6, wherein the battery manager is configured to determine whether the DCDC converters have a fault according to the second information, and to control the first bypass switch corresponding to the faulty DCDC converter to close if any of the DCDC converters has a fault.
11. The battery energy storage system of claim 4, wherein the battery manager is configured to determine whether the difference of the output voltages of the battery energy storage units is greater than a preset voltage threshold according to the first information, and control the first bypass switch corresponding to the battery energy storage unit to be turned off when it is determined that the difference of the output voltages is greater than the voltage threshold.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115276168A (en) * | 2022-08-10 | 2022-11-01 | 沃太能源股份有限公司 | Interlocking device, energy storage system with interlocking device, control method and device of interlocking device |
| CN116505632A (en) * | 2023-06-30 | 2023-07-28 | 西安为光能源科技有限公司 | Battery charging and discharging circuit and control system and method |
-
2021
- 2021-08-09 CN CN202121855214.9U patent/CN216056382U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115276168A (en) * | 2022-08-10 | 2022-11-01 | 沃太能源股份有限公司 | Interlocking device, energy storage system with interlocking device, control method and device of interlocking device |
| WO2024031795A1 (en) * | 2022-08-10 | 2024-02-15 | 沃太能源股份有限公司 | Interlocking device, energy storage system comprising same, and control method and device for energy storage system |
| CN116505632A (en) * | 2023-06-30 | 2023-07-28 | 西安为光能源科技有限公司 | Battery charging and discharging circuit and control system and method |
| CN116505632B (en) * | 2023-06-30 | 2023-09-15 | 西安为光能源科技有限公司 | Battery charging and discharging circuit and control system and method |
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