CN218102655U - High voltage control system - Google Patents
High voltage control system Download PDFInfo
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- CN218102655U CN218102655U CN202222036783.1U CN202222036783U CN218102655U CN 218102655 U CN218102655 U CN 218102655U CN 202222036783 U CN202222036783 U CN 202222036783U CN 218102655 U CN218102655 U CN 218102655U
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Abstract
The utility model provides a high-pressure control system, high-pressure control system includes: the system comprises a primary loop, a DC/DC converter, a wiring terminal and a secondary control loop, wherein the primary loop is connected with a battery cluster; the DC/DC converter is selectively connected with the battery cluster; the internal wiring port of the wiring terminal is connected with the DC/DC converter, and the external wiring port of the wiring terminal is selectively connected with a reserved power interface of the power grid through the power converter; the controller is arranged on the secondary control loop, a secondary power supply of the secondary control loop can be selectively provided by the battery cluster and the power grid, and the controller is used for cutting off the power supply of the battery cluster under the condition that the battery is over-discharged when the secondary power supply is provided by the battery cluster so as to protect the energy storage battery. By adopting the high-voltage control system, the reliability of the secondary power supply is improved, the reliability of the system operation is indirectly improved, the performance of the protection battery can be effectively improved, and the problem of poor safety of an energy storage system in the prior art is solved.
Description
Technical Field
The utility model relates to an energy storage technology field particularly, relates to a high-pressure control system.
Background
The important functions of the energy storage technology in the aspects of improving the new energy accepting capacity of a power grid, adjusting the frequency of the power grid, cutting peaks and filling valleys, improving the power quality and the power reliability and the like are internationally agreed. In recent years, with the continuous maturation of electrochemical energy storage technology and the rapid reduction of cost, the electrochemical energy storage in China is rapidly increased, and the total installed capacity is increased from 105MW in 2015 to 1.034GW in 2018, which is increased by 114% per year.
In recent years, the accident of the battery energy storage system is frequent: more than 20 accidents of energy storage power stations occurred in the batteries of korea since 2017; 16 months in 2021, the Beijing Toftada collected the explosion accident of the energy storage power station; in 30 days 7 months in 2021, the Australian Tesla energy storage power station has a fire risk of 8230823060, which seriously affects the trust of governments, the industry and the public on the energy storage industry and greatly restricts the healthy development of the energy storage industry. Therefore, the problem of poor safety of the energy storage system exists in the prior art, and it is very necessary to improve the design reliability of the energy storage system.
The high-voltage control box is a high-voltage power loop management unit of the energy storage system and is a middle unit for connecting the battery cluster and the energy storage converter, and has the functions of collecting the voltage of the battery cluster and the current of the battery cluster, controlling and protecting a contactor of a battery cluster loop and the like. A circuit breaker, a contactor, a fuse, a circulation control circuit, a current sensor, a battery cluster control management module (master control) and the like are arranged in the high-voltage control box. The energy storage battery management system is provided with a CAN and RS-485 communication bus interface, CAN realize the control and communication functions among a high-voltage control box, an energy storage battery management module (slave control), an energy storage battery management system host (display control), an energy storage converter, an energy management system and a fire fighting system, and realizes the control, protection and data management of an energy storage battery cluster. The high-voltage control box is undoubtedly a key part for safe and stable operation of the energy storage system. The realization of the functions can not leave the supply of the secondary power supply of the system, and the reliability of the secondary power supply of the system is ensured to play a key role in the stable operation of the whole energy storage system.
However, the secondary power supply of the conventional energy storage system is single, the conventional secondary power supply power taking mode is used for supplying power to a power grid, when the power grid fails, the UPS equipment is switched to supply power for a short time, and the energy storage system stops running if the secondary power supply of the energy storage system is disconnected for a long time.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a high voltage control system to solve the problem of poor safety of energy storage system in the prior art.
In order to achieve the above object, according to an aspect of the present invention, there is provided a high voltage control system including: a primary loop connected with the battery cluster; a DC/DC converter selectively connected with the battery cluster; the internal wiring port of the wiring terminal is connected with the DC/DC converter, and the external wiring port of the wiring terminal is selectively connected with a reserved power interface of a power grid through the power converter; the secondary control loop is provided with a controller, a secondary power supply of the secondary control loop can be selectively provided by the battery cluster and the power grid, and the controller is used for cutting off the power supply of the battery cluster under the condition that the battery is overdischarged when the secondary power supply is provided by the battery cluster.
Further, the DC/DC converter is selectively connected to the battery clusters through the control switch.
Further, the primary loop is connected with the converter.
Further, a circuit breaker is arranged on the primary loop.
Further, the primary circuit comprises a positive circuit and a negative circuit, and the positive circuit is provided with a contactor.
Furthermore, a pre-charging resistor and a pre-charging relay are arranged on the positive pole circuit, the pre-charging resistor and the pre-charging relay are arranged in series, and the pre-charging resistor and the pre-charging relay are arranged in parallel with the contactor.
Further, a current divider is arranged on the negative circuit.
Further, the power converter is selectively connected with a reserved power interface of the power grid through a switch.
Use the technical scheme of the utility model, secondary control circuit's secondary power supply is optionally provided by battery cluster and electric wire netting, wherein, when being provided by the battery cluster, secondary control circuit's secondary power supply comes from inside the high-pressure control system, specifically, convert the power of battery cluster into the required secondary power supply of secondary control circuit through the inside DC/DC converter of high-pressure control system, under the inside secondary power supply reliable operation's of high-pressure control system condition, the controller keeps normal operation, and real-time and inside battery management system communication and gather battery data, judge whether there is the overdischarge condition in the battery according to the battery information of gathering, if confirm that the battery has the overdischarge condition, then the battery cluster power supply mode of the automatic energy storage system that cuts off through the control of controller, realize the protection to energy storage battery. And under the condition of cutting off the power supply mode of the battery cluster, an external wiring port of the wiring terminal is connected with a reserved power interface of a power grid through a power converter, at the moment, the power grid provides a secondary power supply for the secondary control loop, namely the secondary power supply of the secondary control loop comes from the outside of the high-voltage control system, specifically, the power converter is arranged at the external wiring port of the wiring terminal, and the power grid or other power supplies provide the secondary power supply after power conversion, so that the energy storage system can be restarted, timely power supplementing and maintenance of the energy storage system are realized, the service life of the battery is prolonged, and the reliability of the energy storage system is ensured to the maximum extent. By adopting the high-voltage control system, the reliability of the secondary power supply is improved, the reliability of the system operation is indirectly improved, the performance of the protection battery can be effectively improved, and the problem of poor safety of an energy storage system in the prior art is solved.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural view of an embodiment of a high voltage control system according to the present invention;
fig. 2 shows a schematic structural diagram of an embodiment of a secondary control loop of a high voltage control system according to the present invention.
Wherein the figures include the following reference numerals:
10. a primary loop; 11. a circuit breaker; 12. a contactor; 13. pre-charging a resistor; 14. a pre-charging relay; 15. a flow divider; 16. a fuse;
20. a battery cluster;
30. a wiring terminal;
40. a power grid;
51. a power converter; 52. a DC/DC converter;
60. a current transformer;
70. a control switch;
80. and (6) switching.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, and in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same reference numerals are used to designate the same devices, and thus the description thereof will be omitted.
Referring to fig. 1 and 2, according to an embodiment of the present application, a high voltage control system is provided.
Specifically, the high-voltage control system includes the primary circuit 10, the DC/DC converter 52, the connection terminal 30, and the secondary control circuit. The primary circuit 10 is connected with the battery cluster 20, the DC/DC converter 52 is selectively connected with the battery cluster 20, the internal wiring port of the wiring terminal 30 is connected with the DC/DC converter 52, the external wiring port of the wiring terminal 30 is selectively connected with a reserved power interface of the power grid 40 through the power converter 51, the secondary control circuit is provided with a controller, the secondary power of the secondary control circuit is selectively provided by the battery cluster 20 and the power grid 40, and the controller is used for cutting off the power supply of the battery cluster 20 when the secondary power is provided by the battery cluster 20 and the over-discharge of the battery occurs.
By applying the technical scheme of the embodiment, the secondary power supply of the secondary control loop can be selectively provided by a battery cluster and a power grid, wherein when the secondary power supply is provided by the battery cluster, the secondary power supply of the secondary control loop comes from the inside of the high-voltage control system, specifically, the power supply of the battery cluster 20 is converted into the secondary power supply required by the secondary control loop through a DC/DC converter in the high-voltage control system, under the condition that the secondary power supply in the high-voltage control system reliably runs, a controller (BMU in fig. 2) keeps normal operation, communicates with an internal battery management system in real time and collects battery data, judges whether the battery has an over-discharge condition according to collected battery information, and if the battery is determined to have the over-discharge condition, the power supply mode of the battery cluster 20 of the energy storage system is automatically cut off through the control of the controller, so as to protect the energy storage battery. And under the condition of cutting off the power supply mode of the battery cluster 20, the external wiring port of the wiring terminal 30 is connected with the reserved power interface of the power grid 40 through the power converter 51, at this time, the power grid 40 provides a secondary power supply for the secondary control loop, namely, the secondary power supply of the secondary control loop comes from the outside of the high-voltage control system, specifically, the power converter 51 is configured at the external wiring port of the wiring terminal 30, and the power grid 40 or other power supplies provide the secondary power supply (as shown by a dotted line in fig. 1) after power conversion, so that the energy storage system can be restarted, further, the timely power supply maintenance of the energy storage system is realized, the service life of the battery is prolonged, and the reliability of the energy storage system is ensured to the greatest extent. By adopting the high-voltage control system, the reliability of the secondary power supply is improved, the reliability of the system operation is indirectly improved, the performance of the protection battery can be effectively improved, and the problem of poor safety of an energy storage system in the prior art is solved. In the present embodiment, the power converter 51 may be an AC/DC converter or a DC/DC converter.
According to one embodiment of the present application, the DC/DC converter 52 is responsible for converting the high voltage of the battery cluster 20 into a 24V power for the energy storage system, and may also be converted into a 48V power or other power for ensuring the normal operation of the energy storage system. The connection terminal 30 is responsible for communication connection, power input/output connection and the like inside and outside the high-voltage control system.
Further, the DC/DC converter 52 is selectively connected to the battery cluster 20 through the control switch 70. In the embodiment, the control switch 70 has a shunt trip protection function, and when the circuit loop including the control switch 70 runs due to an overcurrent, the control switch 70 trips through an internal thermal magnetic trip coil to cut off the power supply of the battery pack 20, so as to protect the circuit loop including the control switch 70.
Further, the primary circuit 10 is connected to a current transformer 60. Wherein, a breaker 11 is arranged on the primary loop 10. The circuit breaker 11 is provided with shunt tripping, and when the energy storage system has overcurrent, the tripping protection is realized by utilizing the thermomagnetic tripping function in the circuit breaker 11. When the energy storage system has unpredictable faults, the BMS sends out an emergency cut-off command, and the electrified loop of the battery cluster 20 can be safely and quickly cut off during charging or discharging. When a fire disaster occurs to the energy storage system or an emergency stop signal is manually started from the outside, the circuit breaker 11 can quickly perform shunt tripping protection, so that the safety of the whole energy storage system is ensured. When the energy storage system is powered on or powered off for the first time, the circuit breaker 11 can be directly and manually closed or disconnected to control the connection and disconnection between the primary loop 10 and the battery cluster 20 and between the primary loop and the converter 60, so that the safety of the energy storage system is improved.
Further, the primary circuit 10 includes a positive circuit on which the contactor 12 is provided, and a negative circuit. The contactor 12 is closed and cut off according to the working condition requirement of the charging and discharging operation of the battery, and the operation requirement of the energy storage system is met.
In an exemplary embodiment of the present application, a fuse 16 is also provided on the positive circuit. The fuse 16 has a fast cut-off capability, and can rapidly cut off a loop including the battery pack 20 and the primary loop 10 when the loop is short-circuited or a large current is generated, thereby ensuring the safety of the battery pack 20 and the primary loop 10.
Further, a pre-charging resistor 13 and a pre-charging relay 14 are provided on the positive circuit, the pre-charging resistor 13 and the pre-charging relay 14 are provided in series, and the pre-charging resistor 13 and the pre-charging relay 14 are provided in parallel with the contactor 12. The circuit that contains pre-charge resistance 13 and pre-charge relay 14 is the pre-charge circuit, can protect contactor 12 through the pre-charge circuit, and when inserting converter 60 after the many clusters of parallelly connected of battery cluster 20, the pre-charge circuit can balance the electric current between the many clusters of battery cluster 20, prevents that the loop current who contains battery cluster 20 is too big, has improved energy storage system's reliability and security.
Further, a current divider 15 is provided on the negative electrode circuit. The current divider 15 is responsible for collecting current information during operation of the battery cluster 20.
Further, the power converter 51 is selectively connected to a reserved power interface of the power grid 40 via a switch 80.
The BMU is electrically connected with the battery cluster 20, the circuit breaker 11, the contactor 12, the pre-charging relay 14 and the control switch 70, and is used for controlling the on-off of the circuit breaker 11, the contactor 12, the pre-charging relay 14 and the control switch 70. The BMU is a core control component of the high-voltage control system, and has functions of temperature acquisition in the high-voltage control system, control and protection of the contactor 12, disconnection protection of the circuit breaker 11, disconnection protection of the control switch 70, control of the precharge relay 14, control of the slave power supply, and the like. The BMU is also provided with CAN and RS-485 communication bus interfaces, so that the control and communication functions between the high-voltage control system and the energy storage battery management module (slave control), the energy storage battery management system host (display control), the converter 60, the energy management system and the fire protection system CAN be realized, and the control, protection and data management of the battery cluster 20 CAN be realized. The control switch 70 is a basic component of a power supply required for ensuring the normal operation of the BMS power supply, ensuring the shunt protection function of the circuit breaker 11, the closing function of the contactor 12, the pre-charging function of the circuit including the pre-charging relay 14, ensuring the operation of the temperature controlled fan of the energy storage system, and the like. The control switch 70 has a shunt tripping protection function, and when the energy storage system is in overcurrent, the control switch 70 receives a control instruction of the BMU to be quickly cut off so as to protect the energy storage system.
As shown in fig. 2, the BMU has a plurality of terminals, and a part of the terminals are connected to the relays (KA 1, KA2, KA3, and KA4 in fig. 2). The intermediate relay is a control component of each shunt release, a slave control power supply output and the like. When the system is normal, the BMU controls the KA1 intermediate relay to realize the on-off of the main positive contactor KM1 (namely, the contactor 12 on the primary loop 10), the BMU controls the pre-charging relay 14 to realize the on-off of the pre-charging function through the KM2, and the BMU controls the KA2 intermediate relay to realize the on-off of the output of the slave control power supply. And one of the terminals of a battery management system main control module (BMU) is connected with a normally closed switch of a fire protection starting system, when a fire disaster occurs to the energy storage system, the fire protection system starts linkage fire extinguishing protection, the normally closed switch is opened to act, the BMU obtains a signal to start a delay instruction (specific delay time can be set), and rapidly acts a KA4 coil, a normally open contact of the KA4 is closed, the breaker QF1 performs shunt tripping protection, namely, a breaker 11 on a primary loop 10 is opened, and the delay is completed. Then, the coil KA3 is actuated, the normally open contact of the coil KA3 is closed, the control switch QF2 performs trip protection, that is, the control switch 70 in fig. 1 is opened, at this time, the power supply mode of the battery cluster 20 is cut off, and the operation of the temperature control fan is stopped, so that the protection function of the energy storage system is realized.
By adopting the high-voltage control system, under the condition of normal power supply of a power grid, a user can select to supply power by the system battery cluster 20 or the power grid 40 according to the requirement, and only one of the system battery cluster 20 and the power grid 40 can be selected.
1) When the power supply mode of the power grid 40 is adopted, the control switch 70 needs to be manually turned off, the switch 80 is turned on, and the external wiring port (the wiring port at F in fig. 1) of the wiring terminal 30 is connected with the reserved 24V power interface of the power grid 40 through the power converter 51, and supplies power to the secondary control loop through the internal wiring port (the wiring port at E in fig. 1) of the wiring terminal 30.
2) When the battery pack 20 is used as a secondary power supply, the control switch 70 needs to be manually closed when power is supplied for the first time, the switch 80 is opened, the internal wiring port (E wiring port in fig. 1) of the wiring terminal 30 is connected with the battery pack 20 through the DC/DC converter 52, and power is supplied to the secondary control loop through the external wiring port (F wiring port in fig. 1) of the wiring terminal 30.
When the system battery cluster 20 is selected to supply power, the BMU judges the voltage data acquired by the battery through slave control, and when the battery is judged to be in a serious over-discharge condition, the BMU outputs a signal to control the KA3 relay to act, so that the breaker 11 is tripped, the battery cluster 20 is stopped to continue to provide a secondary power supply for the energy storage system, and the purpose of protecting the energy storage battery is achieved.
When the power is normally supplied by the battery cluster 20, a 24V power indicator lamp of a secondary control loop (as shown in fig. 2) is in a lamp-on state, if the lamp-off condition suddenly occurs, after the component fault is eliminated, the circuit breaker 11 is manually closed, and the circuit breaker 11 is always in a shunt trip condition, so that the battery of the energy storage system can be judged to be in a serious over-discharge state, at the moment, a power supply mode of a power grid 40 needs to be adopted to supply power for the secondary control loop, and the energy storage system is normally started to perform charging and power supplementing operations on the battery, so that the purpose of protecting the battery of the energy storage system in time is achieved.
For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition to the foregoing, it should be appreciated that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A high pressure control system, comprising:
a primary loop (10), the primary loop (10) being connected with a battery cluster (20);
a DC/DC converter (52), the DC/DC converter (52) selectively connected with the battery cluster (20);
a connection terminal (30), wherein an internal connection port of the connection terminal (30) is connected with the DC/DC converter (52), and an external connection port of the connection terminal (30) is selectively connected with a reserved power interface of a power grid (40) through a power converter (51);
the secondary control loop is provided with a controller, a secondary power supply of the secondary control loop is selectively provided by the battery cluster (20) and the power grid (40), and the controller is used for cutting off the power supply of the battery cluster (20) when the secondary power supply is provided by the battery cluster (20) and the over-discharge of the battery occurs.
2. High pressure control system according to claim 1,
the DC/DC converter (52) is selectively connected to the battery cluster (20) by a control switch (70).
3. High-voltage control system according to claim 1,
the primary circuit (10) is connected with a converter (60).
4. High-voltage control system according to claim 1,
and a breaker (11) is arranged on the primary loop (10).
5. The high-pressure control system of claim 4,
the primary loop (10) comprises a positive loop and a negative loop, and a contactor (12) is arranged on the positive loop.
6. The high pressure control system of claim 5,
be provided with on the positive pole return circuit and precharge resistance (13) and precharge relay (14), precharge resistance (13) with precharge relay (14) series arrangement, just precharge resistance (13) with precharge relay (14) with contactor (12) parallel arrangement.
7. The high pressure control system of claim 5,
and a current divider (15) is arranged on the negative pole loop.
8. High-voltage control system according to claim 1,
the power converter (51) is selectively connected to a reserved power interface of the power grid (40) via a switch (80).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222036783.1U CN218102655U (en) | 2022-08-03 | 2022-08-03 | High voltage control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222036783.1U CN218102655U (en) | 2022-08-03 | 2022-08-03 | High voltage control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116317035A (en) * | 2023-05-19 | 2023-06-23 | 深圳市首航新能源股份有限公司 | High-voltage control circuit, high-voltage box and energy storage system |
| CN116760152A (en) * | 2023-08-15 | 2023-09-15 | 成都特隆美储能技术有限公司 | Simple control method for industrial and commercial battery system |
-
2022
- 2022-08-03 CN CN202222036783.1U patent/CN218102655U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116317035A (en) * | 2023-05-19 | 2023-06-23 | 深圳市首航新能源股份有限公司 | High-voltage control circuit, high-voltage box and energy storage system |
| CN116760152A (en) * | 2023-08-15 | 2023-09-15 | 成都特隆美储能技术有限公司 | Simple control method for industrial and commercial battery system |
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