CN220172923U

CN220172923U - Energy storage system

Info

Publication number: CN220172923U
Application number: CN202320786297.3U
Authority: CN
Inventors: 刘路宽; 尹雪芹; 曹虎; 李善鹏; 尹小强
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-12-12
Anticipated expiration: 2033-03-31

Abstract

The utility model discloses an energy storage system, comprising: a plurality of energy storage devices and a plurality of switching elements, each energy storage device comprising a first scram switch and a BMS control cabinet, each switching element being connected in series with a control end of the BMS control cabinet of the corresponding energy storage device; the plurality of energy storage devices comprise target energy storage devices, and a power supply of the target energy storage devices is connected with a first emergency stop switch of the target energy storage devices, a first emergency stop switch of other energy storage devices and a plurality of switching elements in series to form a series control loop; when any one of the first emergency stop switches is disconnected, the plurality of energy storage devices stop running, and the energy storage system only needs to press the first emergency stop switch of any one of the energy storage devices to disconnect the energy storage system under the conditions that the system breaks down or the system needs to be shut down for maintenance and the like, so that the plurality of energy storage devices stop running, the whole system is stopped in a linkage way, the whole energy storage system is effectively protected, the safety and the reliability of the system are improved, and meanwhile, the operation convenience and the response speed of emergency shutdown are improved.

Description

Energy storage system

Technical Field

The utility model relates to the technical field of energy storage, in particular to an energy storage system.

Background

With the continuous development of energy storage technology, in the practical application process, the situation that a plurality of energy storage devices are combined to form an energy storage system is also increasing.

At present, for an energy storage system, when one of the energy storage devices fails, the operation of the energy storage device is generally stopped, however, other energy storage devices in the system are still in an operation state, and damage to the energy storage devices is possibly caused, so that potential safety hazards exist, and the safety and reliability of the whole energy storage system are reduced.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art.

Therefore, an object of the present utility model is to provide an energy storage system, which only needs to press a first emergency stop switch of any energy storage device when the system fails or needs to be stopped for maintenance, and when any first emergency stop switch is opened, a series control loop is opened, so that a plurality of energy storage devices stop running, thereby the whole system is stopped in a linkage way, the whole energy storage system is effectively protected, the safety and reliability of the system are improved, and meanwhile, the operation convenience and response speed of emergency stop are improved.

To achieve the above object, an embodiment of a first aspect of the present utility model proposes an energy storage system comprising: the energy storage devices are electrically connected, and each energy storage device comprises a first scram switch and a BMS control cabinet; the plurality of switching elements are arranged in one-to-one correspondence with the plurality of energy storage devices, and each switching element is connected with the control end of the BMS control cabinet of the corresponding energy storage device in series; the energy storage devices comprise target energy storage devices, and a power supply of each target energy storage device is connected with a first scram switch of the corresponding target energy storage device, first scram switches of other energy storage devices and a plurality of switching elements in series to form a series control loop; and when any one of the first emergency stop switches is disconnected, stopping the operation of the energy storage devices.

According to the energy storage system provided by the embodiment of the utility model, the first scram protection switch is configured for each energy storage device in the energy storage system, and the power supply source of the target energy storage device is connected with the first scram switch of the target energy storage device, the first scram switches of other energy storage devices and the plurality of switching elements in series, so that the energy storage system is powered by the power supply source of the target energy storage device, and a series control loop is formed among the energy storage devices, therefore, when any one of the first scram switches is disconnected, the series control loop is disconnected, and the plurality of energy storage devices stop running, so that the whole energy storage system is effectively protected, and the safety and reliability of the system are improved; meanwhile, because the series control loop is formed among the energy storage devices, when the system needs emergency shutdown, a user can realize linkage shutdown of the energy storage devices in the system only by pressing a first emergency shutdown switch of one energy storage device nearby, and the operation of the designated energy storage device is not needed, so that the operation is convenient, the time is saved, and the operation convenience and the response speed of the emergency shutdown are improved.

In addition, the energy storage system according to the embodiment of the utility model can also have the following additional technical characteristics:

in some embodiments, the switching element includes a control coil and a normally open contact unit, the normally open contact unit is connected in series with a control end of a BMS control cabinet of a corresponding energy storage device, and the control coil of the switching element is connected in series with a power supply of the target energy storage device and a plurality of first emergency stop switches of the energy storage device to form the series control loop.

In some embodiments, the energy storage system further comprises: the system emergency stop switch is connected with the power supply of the target energy storage device and is connected with the first emergency stop switches of the plurality of energy storage devices and the control coils of the plurality of switching elements in series.

In some embodiments, the energy storage system further comprises: and the standby power supply is connected with the power supply of the target energy storage device in parallel.

In some embodiments, the backup power source comprises an uninterruptible power supply.

In some embodiments, the energy storage device comprises a power box for providing power to a power supply of the energy storage device, and the switching element is integrally provided in the power box of the respective energy storage device.

In some embodiments, the power supply is integrally disposed in the power distribution box.

In some embodiments, each of the power boxes includes first to sixth pins, wherein the first pin of the power box of the target energy storage device is connected between the positive pole of the power supply source and the system emergency stop switch, the sixth pin of the power box of the target energy storage device is connected with the negative pole of the power supply source, and the first pin and the sixth pin of the power boxes of other energy storage devices are suspended; the second pin of the distribution box of each energy storage device is connected with one end of the first scram switch of the energy storage device, and the third pin of the distribution box of each energy storage device is connected with the other end of the first scram switch of the energy storage device; the fourth pin of the distribution box of each energy storage device is connected with one end of the control coil of the corresponding switching element, and the fifth pin of the distribution box of each energy storage device is connected with the other end of the control coil of the corresponding switching element.

In some embodiments, only the target energy storage device of the plurality of energy storage devices operates when the third pin and the fourth pin of the target energy storage device are electrically connected and the fifth pin and the sixth pin of the target energy storage device are electrically connected.

In some embodiments, the normally open contact unit includes a plurality of sets of normally open contacts, one of the plurality of sets of normally open contacts being connected in series with a control end of at least one BMS control cabinet of the respective energy storage device.

In some embodiments, the switching element comprises a relay.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of an energy storage system according to one embodiment of the utility model;

FIG. 2 is a schematic diagram of an energy storage system according to another embodiment of the present utility model;

fig. 3 is a schematic structural view of a switching element according to an embodiment of the present utility model.

Reference numerals: an energy storage device 1; an energy storage device 2; an energy storage device 3; a first scram switch 11; a first scram switch 21; a first scram switch 31; a power supply 12; a power supply 22; a power supply 32; BMS control cabinet 13; BMS control cabinet 23; a BMS control cabinet 33; a control coil 131; a control coil 231; a control coil 331; a switching element 14; a switching element 24; a switching element 34; a control coil 141; a control coil 241; a control coil 341; a normally open contact unit 142; a normally open contact unit 242; a normally open contact unit 342; a distribution box 17; a distribution box 27; a distribution box 37; a system scram switch 18; a backup power supply 19.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described herein and shown in the figures can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

An energy storage system according to an embodiment of the present utility model is described below with reference to fig. 1-3.

In particular embodiments, the energy storage system may be an energy storage station including a plurality of energy storage devices, each of the energy storage devices having one or more energy storage cabinets disposed therein.

Fig. 1 is a schematic diagram of an energy storage system according to one embodiment of the utility model. Fig. 2 is a schematic diagram of an energy storage system according to another embodiment of the present utility model. The energy storage system includes a plurality of energy storage devices and a plurality of switching elements.

As shown in fig. 1, the case where the energy storage system includes a plurality of energy storage devices, for example, including energy storage device 1 to energy storage device N, where N is a positive integer greater than 1, is illustrated, and in the embodiment shown in fig. 1, for example, but not limited to, n=3, i.e., the plurality of energy storage devices includes energy storage device 1, energy storage device 2, and energy storage device 3.

As shown in fig. 2, the case is illustrated where the energy storage system comprises one energy storage device (i.e. a single energy storage device), in the embodiment shown in fig. 2 the energy storage system comprises only the energy storage device 1.

Specifically, a plurality of energy storage device electricity are connected, and every energy storage device includes first scram switch, power supply and BMS switch board. For example, as shown in fig. 1, the energy storage device 2, and the energy storage device 3 are electrically connected, and each of the energy storage device 1, the energy storage device 2, and the energy storage device 3 includes: first scram switch and BMS switch board.

The plurality of switching elements are arranged in one-to-one correspondence with the plurality of energy storage devices, and each switching element is connected with the control end of the BMS control cabinet of the corresponding energy storage device in series. For example, as shown in fig. 1, the number of the plurality of relays is 3, i.e., the switching element 14, the switching element 24, and the switching element 34, corresponding to the number of 3 energy storage devices. The switching element 14 is arranged corresponding to the energy storage device 1, and the switching element 14 is connected in series with the control end of the BMS control cabinet 13 of the energy storage device 1; the switching element 24 is correspondingly arranged with the energy storage device 2, and the switching element 24 is connected in series with the control end of the BMS control cabinet 23 of the energy storage device 2; the switching element 34 is provided corresponding to the energy storage device 3, and the switching element 34 is connected in series with a control terminal of the BMS control cabinet 33 of the energy storage device 3.

The plurality of energy storage devices comprise target energy storage devices, a power supply source of the target energy storage devices is connected with a first emergency stop switch of the target energy storage devices, first emergency stop switches of other energy storage devices and a plurality of switching elements in series, so that the energy storage system is powered by the power supply source of the target energy storage devices, a series control loop is formed among the energy storage devices, and when any one of the first emergency stop switches is disconnected, the plurality of energy storage devices stop running.

For example, when the system fails or needs to be shut down for maintenance, the first emergency stop switch of any energy storage device is only pressed, and when any first emergency stop switch is turned off, the series control loop can be cut off, so that the series control loop is turned off, the switching elements in the plurality of energy storage devices are powered off, the control end of the BMS control cabinet connected with the switching elements in series is powered off, and the corresponding energy storage device stops running. Therefore, the operation of the plurality of energy storage devices is stopped, and the energy storage devices in the whole system are stopped in a linkage way, so that the whole energy storage system is effectively protected, and the safety and the reliability of the system are improved; meanwhile, because the series control loop is formed among the energy storage devices, when the system needs emergency shutdown, a user can stop the operation of the plurality of energy storage devices only by pressing a first emergency shutdown switch of one energy storage device nearby, the energy storage devices in the system are stopped in a linkage way, and the operation of the designated energy storage devices is not needed, so that the operation is convenient, the time is saved, and the operation convenience and the response speed of the emergency shutdown are improved.

As a specific embodiment, as shown in connection with fig. 1, the energy storage system according to the embodiment of the present utility model includes, for example, but not limited to, 3 energy storage devices, such as the energy storage device 1, the energy storage device 2, and the energy storage device 3, and correspondingly, 3 switching elements, such as the switching element 14, the switching element 24, and the switching element 34, are provided, wherein the switching element 14 is provided corresponding to the energy storage device 1, the switching element 24 is provided corresponding to the energy storage device 2, and the switching element 34 is provided corresponding to the energy storage device 3. The energy storage device 1 is configured as a target energy storage device, the power supply 12 of the target energy storage device, namely the energy storage device 1, is used as the power supply of a series control loop, namely the power supply 12 of the energy storage device 1 is respectively connected with the first emergency stop switch 11 of the energy storage device 1 in series, and is simultaneously connected with the first emergency stop switch 21 of the energy storage device 2 in series, and is simultaneously connected with the first emergency stop switch 31 of the energy storage device 3 in series, and is simultaneously connected with the switch element 14 of the energy storage device 1 in series, and is simultaneously connected with the switch element 24 of the energy storage device 2 in series, and is simultaneously connected with the switch element 34 of the energy storage device 3 in series, thereby forming a series control loop among a plurality of energy storage devices, and under the conditions that the system fails or the maintenance needs to be stopped, the like, the energy storage device 1, the energy storage device 2 and the energy storage device 3 can be stopped in a linkage way only by pressing the first emergency stop switch of any one of the energy storage device 1, the energy storage device 2 and the energy storage device 3, so that the whole energy storage system is effectively protected, the safety and the reliability of the system are improved, and simultaneously, and the user can select the energy storage device nearest to the emergency stop operation to the system to the emergency stop operation.

According to the energy storage system provided by the embodiment of the utility model, the first scram protection switch is configured for each energy storage device in the energy storage system, and the power supply 12 of the target energy storage device 1 is connected with the first scram switch 11 thereof and the first scram switches and the plurality of switching elements of other energy storage devices in series, so that the energy storage system is powered by the power supply 12 of the target energy storage device 1, and a series control loop is formed among the energy storage devices, therefore, when any one of the first scram switches is disconnected, the series control loop is disconnected, and the plurality of energy storage devices stop running, thereby effectively protecting the whole energy storage system and improving the safety and reliability of the system; meanwhile, because the series control loop is formed among the energy storage devices, when the system needs emergency shutdown, a user can realize linkage shutdown of the energy storage devices in the system only by pressing a first emergency shutdown switch of one energy storage device nearby, and the operation of the designated energy storage device is not needed, so that the operation is convenient, the time is saved, and the operation convenience and the response speed of the emergency shutdown are improved.

In some embodiments, the switching element includes a control coil and a normally open contact unit, the normally open contact unit is connected in series with a control end of the BMS control cabinet of the corresponding energy storage device, and the control coil of the switching element is connected in series with a power supply of the target energy storage device, a first scram switch of the plurality of stored energy devices, to form a series control loop.

In the embodiment shown in fig. 1, the target energy storage device is the energy storage device 1, the switch element 14 includes the control coil 141 and the normally open contact unit 142, the switch element 24 includes the control coil 241 and the normally open contact unit 242, the switch element 34 includes the control coil 341 and the normally open contact unit 342, the power supply 12 of the energy storage device 1 is connected in series with the first emergency stop switch 11 thereof, the first emergency stop switch 21 of the energy storage device 2, the first emergency stop switch 31 of the energy storage device 3, the switch element 14, the switch element 24 and the switch element 34341, since the control end of the BMS control cabinet of each energy storage device is connected in series with the normally open contact of the corresponding switch element, when the first emergency stop switch of any energy storage device is pressed, the contact state of the switch element is changed from normally open to normally closed, since the control end of the corresponding BMS control cabinet is connected in series with the normally open contact, the corresponding BMS control cabinet receives the corresponding emergency stop signal to stop, since all the switch elements belong to one series control loop, when the first emergency stop switch element of any energy storage device is pressed down, all normally closed switches in the emergency stop system are stopped, all the normally closed control system is stopped by the emergency stop system, thereby realizing that all the normally closed control loop is changed, and all the energy storage system is stopped by the emergency stop system is realized.

In specific embodiment, the control end of BMS switch board is configured as control coil, and the power supply of BMS switch board is connected to control coil to the BMS switch board is through its control coil received scram signal control its power supply's state, realizes the shut down of BMS switch board, and control accuracy and reliability are high.

For example, as shown in fig. 1, the control end of the BMS control cabinet 13 is configured to control the coil 131, and the control coil 131 is connected to the power supply of the BMS control cabinet 13 to control the state of the power supply of the BMS control cabinet 13, and further control the operation state of the BMS control cabinet 13, such as controlling the start or stop of the BMS control cabinet 13.

In some embodiments, as shown in connection with fig. 1, the energy storage system further includes a system scram switch 18, where the system scram switch 18 is connected to the power supply of the target energy storage device and is connected in series with the first scram switch of the plurality of energy storage devices and the control coils of the plurality of switching elements.

Specifically, the system scram switch 18, the power supply of the target energy storage device, the first scram switches of the plurality of energy storage devices in the energy storage system and the control coils of the plurality of switching elements are connected in series, so that the system scram switch 18 and each energy storage device form a series control loop, and therefore, when the system fails or needs to be shut down for maintenance and the like, the series control loop can be cut off only by pressing the first scram switch of any one of the energy storage devices or the system scram switch 18, and the energy storage devices in the whole system are shut down in a linkage way, so that the whole energy storage system is effectively protected, and the safety and reliability of the system are improved; meanwhile, because the series control loop is formed among the energy storage devices, when the system needs emergency shutdown, a user can realize linkage shutdown of the energy storage devices in the system only by pressing the system emergency shutdown switch 18 or the first emergency shutdown switch of one energy storage device nearby, and the operation of the designated energy storage device is not needed, so that the operation is convenient, the time is saved, and the operation convenience and the response speed of the emergency shutdown are improved.

In other words, on the basis of the series control loop formed by the energy storage devices according to the foregoing embodiment, the system emergency stop switch 18 is further set, and the system emergency stop switch 18 is serially connected in the series control loop and is connected with the power supply of the target energy storage device, so as to form a new series control loop, in the new series control loop, the series control loop can be cut off by operating the first emergency stop switch of any energy storage device or the system emergency stop switch 18, so that all the energy storage devices in the whole station are stopped, thereby realizing the linkage emergency stop of each energy storage device in the energy storage system, and improving the safety and reliability of the energy storage system.

In a specific embodiment, as shown in fig. 1, the energy storage device 1 is configured as a target energy storage device, the energy storage system adds a system scram switch 18, one end of the system scram switch 18 is connected with the power supply 12 of the energy storage device 1, and the other end of the system scram switch 18 is sequentially connected with a first scram switch 11 of the energy storage device 1, a first scram switch 21 of the energy storage device 2, a first scram switch 31 of the energy storage device 3, a control coil 141 of the switching element 14 of the energy storage device 1, a control coil 241 of the switching element 24 of the energy storage device 2, and a control coil 341 of the switching element 34 of the energy storage device 3 in series, thereby forming a series control loop. By connecting the system scram switch 18 in series with the power supply 12 of the target energy storage device, i.e. the energy storage device 1, and the first scram switch of each energy storage device and the control coil of the switching element, when the system scram switch 18 or any one of the first scram switches is pressed, the series control loop is cut off, the power supply 12 is no longer supplied, the power supply lines of the control coils of all the switching elements are disconnected, the state of the normally open contact units of the switching elements is changed from normally open to normally closed, and since the control end (receiving scram signals) of the BMS control cabinet correspondingly connected with the switching elements is connected in series with the normally open contact units of the switching elements, when the normally open contact units are switched to normally closed, the control end of the corresponding BMS control cabinet receives the scram signals to stop.

In a specific embodiment, the first scram switch and/or the system scram switch 18 is configured as a switch button that is only pushed by a user to trigger a response, thereby facilitating operation by the user, and is simple in structure and low in cost.

Specifically, the system scram switch 18 and the first scram switch 11 of the target energy storage device 1, the first scram switch 21 of the energy storage device 2, and the first scram switch 31 of the energy storage device 3 are set as switch buttons. The switch button has the advantages that the structure is simple, the operation is convenient, the cost is low, when any energy storage device fails or is required to be stopped for maintenance, the quick unlocking and locking operation of the switch button can be realized, the misoperation of a worker to the switch button can be effectively prevented, and the safety of the switch button is improved.

In some embodiments, as shown in connection with fig. 1, the energy storage system further comprises: the standby power supply 19, the standby power supply 19 is connected in parallel with the power supply of the target energy storage device, so that when the power supply of the target energy storage device fails or power supply is interrupted, the standby power supply 19 is started to provide standby power support for the energy storage system, the energy storage system can maintain normal operation, and the stability and reliability of the energy storage system are improved.

In a specific embodiment, as shown in fig. 1, an energy storage device 1 is configured as a target energy storage device, and a standby power supply 19 is additionally added in addition to the target energy storage device, that is, the 24V power supply provided by the energy storage device 1, where the standby power supply 19 is connected in parallel with the 24V power supply provided by the energy storage device 1, and when the 24V power supply of the energy storage device 1 is in normal operation, it provides the energy storage system with the required electric energy, and at this time, the standby power supply 19 does not work; when the 24V power supply of the energy storage device 1 fails or power supply is interrupted, the standby power supply 19 is started to provide standby power support for the energy storage system, so that the energy storage system can maintain normal operation, and the stability and reliability of the energy storage system are improved. Therefore, by adding the standby power supply 19 in the energy storage system, the influence on the normal operation of the whole energy storage system when the auxiliary power supply of the target energy storage device fails can be effectively prevented, and the operation stability and reliability of the energy storage system are improved.

In some embodiments, the backup power source 19 comprises an uninterruptible power supply, such as a 24V uninterruptible power supply UPS (Uninterruptible Power Supply ), such that the backup power source 19 has high power supply sustainability and power supply stability.

In particular embodiments, the UPS may be comprised of a battery pack. As shown in fig. 1, the positive pole of the UPS is connected to the target energy storage device, that is, the positive pole of the power supply 12 of the energy storage device 1, and the negative pole of the UPS is connected to the negative pole of the power supply 12 of the energy storage device 1, whereby the UPS is connected in parallel with the power supply 12 of the target energy storage device 1 as a backup power source 19. When the power supply 12 supplies power normally, the UPS can absorb the electric energy output by the power supply 12 to charge until full power is supplied. When the power supply 12 fails or is interrupted, the UPS is turned on to release the stored electrical energy to the energy storage system, so as to supply power to each energy storage device in the system, so that the energy storage system keeps operating normally, and the system is ensured to operate stably and reliably. When the power supply 12 resumes normal power supply, the UPS stops discharging and the power supply 12 continues to supply power to the energy storage system. Therefore, the uninterrupted power supply is configured in the energy storage system as the standby power supply 19, so that uninterrupted operation of the energy storage system is ensured, the problems that the operation of the energy storage system is influenced due to the failure or interruption of power supply of the power supply 12, the data of the system is lost and the like are prevented, and the stability and the reliability of the energy storage system are improved.

In some embodiments, as shown in fig. 1, each energy storage device includes a distribution box, where the distribution box is used to provide electric energy to a power supply of the energy storage device, and the switching element is integrally disposed in the distribution box of the corresponding energy storage device, so as to effectively utilize a built-in space of the distribution box and improve system integration.

In a specific embodiment, as shown in fig. 1, the power distribution box 17 of the target energy storage device, i.e. the energy storage device 1, connects the switching element 14, the power supply 12 and the first scram switch 11 corresponding to the energy storage device 1 through the pins thereof, wherein the switching element 14 includes the relay coil 141 and the normally open contact unit 142, the power distribution box 17 provides electric energy to the power supply 12 of the energy storage device 1, the power supply 12 provides 24V power to the energy storage device 1, so as to ensure the normal operation of the energy storage device 1 and other energy storage devices connected in series with the power distribution box, and when any one of the first scram switches is pressed, the whole energy storage system stops operating.

In some embodiments, as shown in fig. 1, the power supply is integrated in the distribution box.

In a specific embodiment, as shown in fig. 1, the power supply 12 of the energy storage device 1 is centrally disposed in the distribution box 17, the power supply 22 of the energy storage device 2 is centrally disposed in the distribution box 27, and the power supply 32 of the energy storage device 3 is centrally disposed in the distribution box 37, so that the built-in space of the distribution box is effectively utilized, and the system integration is improved.

In some embodiments, each of the power boxes includes first to sixth pins, wherein the first pin of the power box of the target energy storage device is connected between the positive pole of its power supply and the system emergency stop switch, the sixth pin of the power box of the target energy storage device is connected to the negative pole of its power supply, and the first pin and the sixth pin of the power boxes of other energy storage devices are suspended; the second pin of the distribution box of each energy storage device is connected with one end of the first scram switch of the energy storage device, and the third pin of the distribution box of each energy storage device is connected with the other end of the first scram switch of the energy storage device; the fourth pin of the distribution box of each energy storage device is connected with one end of the control coil of the corresponding switching element, and the fifth pin of the distribution box of each energy storage device is connected with the other end of the control coil of the corresponding switching element.

In a specific embodiment, as shown in FIG. 1, the first pin of the electrical box of each energy storage device is designated, for example, as JP1-1, the second pin of the electrical box of each energy storage device is designated, for example, as JP1-2, the third pin of the electrical box of each energy storage device is designated, for example, as JP1-3, the fourth pin of the electrical box of each energy storage device is designated, for example, as JP1-4, the fifth pin of the electrical box of each energy storage device is designated, for example, as JP1-5, and the sixth pin of the electrical box of each energy storage device is designated, for example, as JP1-6.

Wherein the energy storage device 1 is configured as a target energy storage device, that is, a first pin JP1-1 of a distribution box 17 of the energy storage device 1 is connected between a positive pole of a power supply 12 and a system emergency stop switch 18, a sixth pin JP1-6 of the distribution box 17 of the energy storage device 1 is connected with a negative pole of the power supply 12, and other energy storage devices, such as the first pins JP1-1 and the sixth pins JP1-6 of the distribution boxes of the energy storage device 2 and the energy storage device 3, are suspended. The second pins JP1-2 of the distribution boxes of the energy storage device 1, the energy storage device 2 and the energy storage device 3 are connected with one end of the corresponding first emergency stop switch respectively, and the third pins JP1-3 of the distribution boxes of the energy storage device 1, the energy storage device 2 and the energy storage device 3 are connected with the other end of the corresponding first emergency stop switch 11 respectively; the fourth pins JP1-4 of the energy storage device 1, the energy storage device 2 and the energy storage device 3 are connected with one end of the control coil of the corresponding switching element, and the fifth pins JP1-5 of the energy storage device 1, the energy storage device 2 and the energy storage device 3 are connected with the other end of the control coil of the corresponding switching element.

In some embodiments, as shown in connection with fig. 2, when the third pin and the fourth pin of the target energy storage device are electrically connected and the fifth pin and the sixth pin of the target energy storage device are electrically connected, only the target energy storage device of the plurality of energy storage devices operates.

In a specific embodiment, as shown in fig. 2, the first pin of the target energy storage device, i.e., the energy storage device 1, is denoted by JP1-1, the second pin is denoted by JP1-2, the third pin is denoted by JP1-3, the fourth pin is denoted by JP1-4, the fifth pin is denoted by JP1-5, and the sixth pin is denoted by JP1-6, for example.

When the target energy storage device, namely, the third pin JP1-3 and the fourth pin JP1-4 of the energy storage device 1 are electrically connected, and the fifth pin JP1-5 and the sixth pin JP1-6 are electrically connected, since the first pin JP1-1 of the energy storage device 1 is connected to the positive pole of the power supply 12 thereof, the sixth pin JP1-6 of the energy storage device is connected to the negative pole of the power supply 12 thereof, when the third pin JP1-3, the fourth pin JP1-4, the fifth pin JP1-5 and the sixth pin JP1-6 of the energy storage device 1 are electrically connected, respectively, only the target energy storage device is considered to operate, a path is formed between the positive pole and the negative pole of the power supply 12 of the energy storage device, and the power is supplied to the operation of each component of the energy storage device 1, so that the energy storage device 1 operates normally, thereby realizing the operation of a single energy storage device.

In some embodiments, as shown in connection with fig. 3, the normally open contact unit 142 includes a plurality of sets of normally open contacts, one of which is connected in series with the control end of at least one BMS control cabinet of the corresponding energy storage device. Specifically, the normally open contact unit includes a plurality of groups of normally open contacts, and when actually connected, any one of the plurality of groups of normally open contacts can be selected to be connected in series with the control end of at least one BMS control cabinet of the corresponding energy storage device. As in the example shown in fig. 3, the normally open contact unit includes 2 sets of normally open contacts, in this example, the right-hand normally open contact of the two sets of normally open contacts shown in the selection drawing is connected in series with the control end of at least one BMS control cabinet of the corresponding energy storage device.

In a specific embodiment, as shown in fig. 1 and 3, the normally open contact units of the switching elements of each energy storage device include multiple groups of normally open contacts, typically two groups, and any one group of normally open contacts is selected to be connected in series with at least one BMS control cabinet. In the example shown in fig. 3, taking the switching element 14 corresponding to the energy storage device 1 as an example, the switching element 14 includes a control coil 141 and a normally open contact unit 142, one set of normally open contacts of the normally open contact unit 142 includes a pin 6, a pin 5 and a pin 9, and the other set of normally open contacts of the normally open contact unit 142 includes a pin 4, a pin 8 and a pin 7. Specifically, the pin 5 of a group of normally open contacts may be connected to the second pin JP2-2 of the BMS control cabinet 13 corresponding thereto, and the pin 9 to the eighth pin JP2-8 of the BMS control cabinet 13 corresponding thereto, thereby connecting the normally open contact unit 142 of the switching element 14 in series with the scram control terminal of the BMS control cabinet 13. When the system scram switch 18 or any first scram switch is pressed, the contact states of all the switching elements are changed from normal open to normal closed, and after the corresponding BMS control cabinet receives the normally open contact closing of the switching elements, a scram signal is sent to stop. Of course, in another embodiment, the pin 8 of the other group of normally open contacts may be connected to the second pin JP2-2 of the BMS control cabinet 13 corresponding thereto, and the pin 7 may be connected to the eighth pin JP2-8 of the BMS control cabinet 13, thereby connecting the normally open contact unit 142 of the switching element 14 in series with the scram control terminal of the BMS control cabinet 13. It is to be understood that the specific structures of the switching elements corresponding to the other energy storage devices, such as the switching element 24 corresponding to the energy storage device 2 and the switching element 34 corresponding to the energy storage device 3, are similar to the specific structure of the switching element 13 described above, and for redundancy reduction, details are not repeated here.

In some embodiments, the switching element 14 comprises a relay, and the control coil of the switching element 14 is a relay coil of the relay.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. An energy storage system, comprising:

the energy storage devices are electrically connected, and each energy storage device comprises a first scram switch and a BMS control cabinet;

the plurality of switching elements are arranged in one-to-one correspondence with the plurality of energy storage devices, and each switching element is connected with the control end of the BMS control cabinet of the corresponding energy storage device in series;

the energy storage devices comprise target energy storage devices, and a power supply of each target energy storage device is connected with a first scram switch of the corresponding target energy storage device, first scram switches of other energy storage devices and a plurality of switching elements in series to form a series control loop;

and when any one of the first emergency stop switches is disconnected, stopping the operation of the energy storage devices.

2. The energy storage system according to claim 1, wherein the switching element comprises a control coil and a normally open contact unit, the normally open contact unit is connected in series with a control end of a BMS control cabinet of the corresponding energy storage device, and the control coil of the switching element is connected in series with a power supply of the target energy storage device, a plurality of first emergency stop switches of the energy storage device, and the series control loop is formed.

3. The energy storage system of claim 1, further comprising:

the system emergency stop switch is connected with the power supply of the target energy storage device and is connected with the first emergency stop switches of the plurality of energy storage devices and the control coils of the plurality of switching elements in series.

4. The energy storage system of claim 1, further comprising:

and the standby power supply is connected with the power supply of the target energy storage device in parallel.

5. The energy storage system of claim 4, wherein said backup power source comprises an uninterruptible power supply.

6. The energy storage system of claim 3, wherein the energy storage devices include electrical boxes for providing electrical energy to a power supply of the energy storage devices, the switching elements being integrally provided in the electrical boxes of the respective energy storage devices.

7. The energy storage system of claim 6, wherein the power supply is integrally disposed in the distribution box.

8. The energy storage system of claim 6, wherein each of said electrical boxes comprises first through sixth pins, wherein,

the first pin of the distribution box of the target energy storage device is connected between the positive pole of the power supply of the target energy storage device and the emergency stop switch of the system, the sixth pin of the distribution box of the target energy storage device is connected with the negative pole of the power supply of the target energy storage device, and the first pin and the sixth pin of the distribution box of other energy storage devices are suspended;

the second pin of the distribution box of each energy storage device is connected with one end of the first scram switch of the energy storage device, and the third pin of the distribution box of each energy storage device is connected with the other end of the first scram switch of the energy storage device;

the fourth pin of the distribution box of each energy storage device is connected with one end of the control coil of the corresponding switching element, and the fifth pin of the distribution box of each energy storage device is connected with the other end of the control coil of the corresponding switching element.

9. The energy storage system of claim 8, wherein only the target energy storage device of the plurality of energy storage devices operates when the third pin and the fourth pin of the target energy storage device are electrically connected and the fifth pin and the sixth pin of the target energy storage device are electrically connected.

10. The energy storage system of claim 2, wherein the normally open contact unit comprises a plurality of sets of normally open contacts, one of the plurality of sets of normally open contacts being connected in series with a control terminal of at least one BMS control cabinet of the respective energy storage device.

11. The energy storage system of claim 1, wherein the switching element comprises a relay.