CN218770742U - High-pressure tank of energy storage system - Google Patents
High-pressure tank of energy storage system Download PDFInfo
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- CN218770742U CN218770742U CN202221086884.3U CN202221086884U CN218770742U CN 218770742 U CN218770742 U CN 218770742U CN 202221086884 U CN202221086884 U CN 202221086884U CN 218770742 U CN218770742 U CN 218770742U
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Abstract
The embodiment of the utility model discloses an energy storage system high-voltage box, which comprises a box body, wherein a direct current breaker, a direct current sensor, a contactor and a battery management unit are arranged in the box body; correspondingly, a wiring terminal, a circuit breaker opening and closing handle and a battery management unit communication interface are arranged on a panel of the box body; the direct current circuit breaker is connected with the wiring terminal, is connected with an external battery pack through the wiring terminal, and uploads the connection or disconnection state of the circuit breaker to the battery management unit; the direct current sensor uploads a current signal to the battery management unit; the contactor is connected with the wiring terminal, and the on-off state of the contactor is uploaded to the battery management unit by connecting the wiring terminal with an external battery pack. The reliability of the electric main loop of the local battery pack and the performance of the battery management unit can be further improved, and the reliable operation of a battery system is guaranteed.
Description
Technical Field
The utility model relates to a battery energy storage system technical field, in particular to energy storage system high-pressure tank.
Background
At present, a battery energy storage system plays an irreplaceable role on a power generation side, a power transmission and distribution side and a user side, has wide application scenes, and is one of important means for solving the problem of renewable energy grid connection consumption. The main function of the energy storage system high-voltage box is used for controlling the connection or disconnection of an electric main loop of the system, a battery management unit (BMS for short) arranged in the energy storage system high-voltage box can simultaneously monitor the voltage, the current and the temperature of a battery and the states of a switch, a contactor, a fan and the like in real time, perform operations such as state judgment, thermal management control, balance control and the like on a local battery pack, and simultaneously upload local battery information and respond to remote control.
Because the large-scale energy storage system has numerous management batteries, numerous connection nodes and important safety and reliability of an electric loop, the high-voltage box of the existing energy storage system mostly adopts the technical scheme in the field of electric vehicles, an electric main loop adopts a direct-current contactor to be connected or disconnected, the direct-current contactor in the field of electric vehicles adopts a closed arc extinguish chamber structure, and the contactor has poor arc extinguishing capability and is not suitable for the energy storage system with high power and higher rated voltage. The battery management unit only has a local battery pack information collection function and does not have a large-scale energy storage system main loop electrical connection self-checking function, and the safety and reliability of the operation of the energy storage system cannot be guaranteed.
In the related art, the technical schemes and structural forms of the high-voltage box are numerous, and how to optimize the reliability of the electric main circuit, the total material cost reduction, the performance of the battery management unit and the like becomes a problem to be solved by technical personnel in the field.
In the existing energy storage system, an electric main loop is connected or disconnected by adopting a direct current contactor in the field of automobiles, and the contactor of the type adopts a closed arc extinguishing chamber structure, so that the arc extinguishing capability is poor, and the energy storage system is not suitable for an energy storage system with high power and higher rated voltage; the battery management unit does not have the large-scale energy storage system main loop electrical connection self-checking function, and the safe reliability of the energy storage system in operation cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an energy storage system high-voltage box for solve above-mentioned at least one technical problem, it adopts the switch, main positive contactor, main negative contactor that are applicable to high-power, 1500VDC energy storage system of rated voltage, installs high accuracy direct current sensor and fuse in main electric circuit simultaneously, promotes electric main circuit reliability; the battery management unit processes current signals acquired by the high-precision direct current sensor, has an electric main loop self-checking function, can screen current peaks and arc discharge signals caused by unreliable connection nodes in real time before and during operation of the energy storage system, can further improve the reliability of the electric main loop of the local battery pack and the performance of the battery management unit, and provides guarantee for reliable operation of the battery system.
The embodiment of the utility model is realized like this:
the high-voltage box of the energy storage system comprises a box body 10, wherein a direct-current circuit breaker 20, a direct-current sensor 70, a contactor and a battery management unit 130 are arranged in the box body 10;
correspondingly, a wiring terminal, a breaker opening and closing handle and a battery management unit communication interface are arranged on a panel of the box body 10;
the direct current circuit breaker 20 is connected with the wiring terminal, is connected with an external battery pack through the wiring terminal, and uploads the on-state or off-state of the circuit breaker to the battery management unit 130;
the dc current sensor 70 uploads a current signal to the battery management unit 130;
the contactor is connected with the wiring terminal, is connected with an external battery pack through the wiring terminal, and uploads the on or off state of the contactor to the battery management unit 130;
the battery management unit 130 is configured to collect local battery information, perform state discrimination, thermal management control, and equalization control on a local battery pack, upload local battery information and respond to remote control, and process a current signal acquired by the dc circuit breaker 20.
In a preferred embodiment of the present invention, the terminals of the energy storage system high voltage box include a battery pack total positive terminal, a battery pack total negative terminal, an external total positive terminal and an external total negative terminal;
the external general positive wiring terminal and the battery pack general positive wiring terminal form a positive electrode electric loop;
the external total negative connecting terminal and the battery pack total negative connecting terminal form a negative electric loop;
the dc breaker 20 is connected to an electrical circuit.
In the preferred embodiment of the present invention, a fuse 80 is further disposed in the box body 10 of the energy storage system high-pressure tank;
the fuse 80 is connected to the positive electrical circuit for short-circuit over-current and backup protection of the energy storage system.
In a preferred embodiment of the present invention, the contactor of the energy storage system high-pressure tank includes a main positive contactor 30 and a main negative contactor 40;
the main positive contactor 30 is connected to the positive electrode electric loop, and the on or off state of the main positive contactor 30 is uploaded to the battery management unit 130;
the main negative contactor 40 is connected to the negative electrical circuit, and the on or off state of the main negative contactor 40 is uploaded to the battery management unit 130.
In the preferred embodiment of the present invention, the dc current sensor 70 of the energy storage system high voltage box is connected to the negative electrical loop.
In a preferred embodiment of the present invention, the main positive contactor 30 of the energy storage system high-voltage box is connected in parallel with a protection circuit;
the protection circuit includes a pre-charge resistor 60 and a pre-charge contactor 50.
In a preferred embodiment of the present invention, a main positive busbar assembly 90 and a main negative busbar assembly 100 are further disposed in the box body 10 of the energy storage system high pressure box;
the main positive busbar assembly 90 is connected with the positive electrode electric loop;
the main negative busbar assembly 100 is connected with the negative electrical circuit.
In a preferred embodiment of the present invention, a power module is further disposed in the box body 10 of the energy storage system high-voltage box, and independently supplies power to the local battery pack cooling fan and the battery management unit 130;
the power supply module includes a first power supply module 110 and a second power supply module 120.
In a preferred embodiment of the present invention, the box body 10 of the energy storage system high-pressure tank further includes a bottom plate, a side plate, a cover plate and a rear plate;
the side plate is provided with heat dissipation holes.
In the preferred embodiment of the present invention, the panel of the box 10 of the above-mentioned energy storage system high-voltage box is further provided with a signal interface, an indicator light, an insulation detection interface and a battery management unit communication interface.
The embodiment of the utility model provides a beneficial effect is:
the utility model discloses a be applicable to high-power, 1500VDC energy storage system's of rated voltage circuit breaker, a contactor, direct current sensor, the fuse, copper bar subassembly component electric major loop, direct current sensor possesses and is superior to the sampling of 0.5 level high accuracy electric current and uploads to the battery management unit, the current signal that the battery management unit gathered high accuracy direct current sensor is handled, possess electric major loop self-checking function, can be before energy storage system commissioning and in the operation to the current peak because of the unreliable leading node causes, the arc signal carries out real-time examination, above-mentioned measure can further promote local group battery electric major loop reliability and battery management unit performance, provide the guarantee for battery system reliable operation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of the high-pressure tank of the energy storage system of the present invention;
fig. 2 is a schematic structural view of the electric main loop of the high-voltage box of the energy storage system of the present invention;
fig. 3 is the utility model discloses energy storage system high-voltage box battery management unit functional schematic diagram.
In the figure: 10-a box body; 20-a direct current breaker; 30-a main positive contact; 40-a main negative contactor; 50-a pre-charge contactor; 60-pre-charging resistance; 70-a direct current sensor; 80-a fuse; 90-a main positive busbar assembly; 100-a main negative busbar assembly; a 110-24V power supply 1 module; a 120-24V power supply 2 module; 130-battery management unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Referring to fig. 1 to 3, an embodiment of the present invention provides an energy storage system high voltage box, which includes a box body 10, and a dc circuit breaker 20, a dc current sensor 70, a contactor, and a battery management unit 130 are disposed in the box body 10;
correspondingly, a wiring terminal, a breaker opening and closing handle and a battery management unit communication interface are arranged on a panel of the box body 10;
the direct current circuit breaker 20 is connected with the wiring terminal, is connected with an external battery pack through the wiring terminal, and uploads the on-state or off-state of the circuit breaker to the battery management unit 130;
the rated working voltage of the direct current circuit breaker 20 is 1500VDC, and the rated current is not lower than 250A.
The dc current sensor 70 uploads a current signal to the battery management unit 130;
the rated working voltage of the direct current sensor 70 is 1500VDC, which meets the requirements of 250A/75mV, which is better than 0.5 level.
The contactor is connected with the wiring terminal, is connected with an external battery pack through the wiring terminal, and uploads the on or off state of the contactor to the battery management unit 130;
the battery management unit 130 is configured to collect local battery information, perform state discrimination, thermal management control, and balance control on a local battery pack, upload local battery information and respond to remote control, and process a current signal acquired by the dc circuit breaker 20.
The battery management unit 130 collects local battery information, performs operations such as state discrimination, thermal management control and equalization control on a local battery pack, transmits the local battery information and responds to a remote control function, processes a current signal acquired by a direct current sensor, has an electric main loop self-checking function, can screen current spikes and arc discharge signals caused by unreliable connection nodes in real time before operation and during operation of the energy storage system, and further improves reliability of the electric main loop of the local battery pack and performance of the battery management unit.
In a preferred embodiment of the present invention, the terminals of the energy storage system high voltage box include a battery pack total positive terminal, a battery pack total negative terminal, an external total positive terminal and an external total negative terminal;
the external general positive wiring terminal and the battery pack general positive wiring terminal form a positive electrode electric loop;
the external total negative connecting terminal and the battery pack total negative connecting terminal form a negative electric loop;
the dc breaker 20 is connected to an electrical circuit.
In the preferred embodiment of the present invention, a fuse 80 is further disposed in the box body 10 of the energy storage system high-pressure tank;
the fuse 80 is connected to the positive electrical circuit for short-circuit over-current and backup protection of the energy storage system.
The rated working voltage of the fuse 80 is 1500VDC, the rated current is 200A-400A, and the fuse has strong current limiting and high breaking capacity.
In a preferred embodiment of the present invention, the contactor of the energy storage system high-pressure tank includes a main positive contactor 30 and a main negative contactor 40;
the main positive contactor 30 is connected to the positive electrode electric loop, and the on or off state of the main positive contactor 30 is uploaded to the battery management unit 130;
the main negative contactor 40 is connected to the negative electrical circuit, and the on or off state of the main negative contactor 40 is uploaded to the battery management unit 130.
In the preferred embodiment of the present invention, the dc current sensor 70 of the energy storage system high voltage box is connected to the negative electrical loop.
In a preferred embodiment of the present invention, the main positive contactor 30 of the energy storage system high-voltage box is connected in parallel with a protection circuit;
the protection circuit includes a pre-charge resistor 60 and a pre-charge contactor 50.
The pre-charging resistor 60 is an ohmic resistor, and the rated working voltage is 1500VDC.
In a preferred embodiment of the present invention, a main positive busbar assembly 90 and a main negative busbar assembly 100 are further disposed in the box body 10 of the energy storage system high pressure box;
the main positive busbar assembly 90 is connected with the positive electrical circuit;
the main negative busbar assembly 100 is connected with the negative electrical circuit.
The main positive busbar assembly 90 and the main negative busbar assembly 100 are made of copper materials, an insulating layer is sleeved outside the copper materials, and the working voltage is 1500VDC.
In a preferred embodiment of the present invention, a power module is further disposed in the box body 10 of the energy storage system high-voltage box, and independently supplies power to the local battery pack cooling fan and the battery management unit 130;
the power supply module includes a first power supply module 110 and a second power supply module 120.
The first power module 110 and the second power module 120 are both 24V.
In a preferred embodiment of the present invention, the box body 10 of the energy storage system high-pressure tank further includes a bottom plate, a side plate, a cover plate and a rear plate;
the side plate is provided with heat dissipation holes.
The box 10 is a sheet metal part.
In the preferred embodiment of the present invention, the panel of the box 10 of the above-mentioned energy storage system high-voltage box is further provided with a signal interface, an indicator light, an insulation detection interface and a battery management unit communication interface.
The embodiment of the utility model provides an aim at protecting an energy storage system high-pressure tank, possess following effect:
1. the utility model discloses a direct current circuit breaker, main positive contactor, main negative contactor, pre-charging resistance, direct current sensor, fuse, main positive female subassembly of arranging, the female subassembly of main negative that are applicable to high-power, 1500VDC energy storage system of rated voltage, the electric main loop of constituteing can satisfy the requirement of extensive energy storage system reliability.
2. The utility model discloses a DC current sensor satisfies to be superior to 0.5 level high accuracy current sampling and uploads to the battery management unit requirement, the current signal that battery management unit gathered high accuracy DC current sensor is handled, possess electric main loop self-checking function, can be before energy storage system puts into operation and in the operation current peak because of the unreliable cause of connected node, draw the arc signal and carry out real-time examination, above-mentioned measure can further promote local group battery electric main loop reliability and battery management unit performance, provide the guarantee for battery system reliable operation.
3. The utility model discloses a precharge return circuit that precharge contactor and precharge resistance are constituteed precharges bus-bar capacitance in advance, can ensure electrical main loop just producing the operation limitedly.
4. The utility model discloses a battery management unit receives higher level battery system PCS and converges cabinet turn-off signal, and the electric major loop of local battery system does not have the current, can realize not taking the load to cut off electric major loop, can effectively protect the interior components and parts of case.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. The high-voltage box of the energy storage system is characterized by comprising a box body (10), wherein a direct current breaker (20), a direct current sensor (70), a contactor and a battery management unit (130) are arranged in the box body (10);
correspondingly, a wiring terminal, a breaker opening and closing handle and a battery management unit communication interface are arranged on a panel of the box body (10);
the direct current circuit breaker (20) is connected with the wiring terminal, is connected with an external battery pack through the wiring terminal, and uploads the connection or disconnection state of the circuit breaker to the battery management unit (130);
the DC current sensor (70) uploading a current signal to the battery management unit (130);
the contactor is connected with the wiring terminal, an external battery pack is connected through the wiring terminal, and the on-off state of the contactor is uploaded to the battery management unit (130);
the battery management unit (130) is used for collecting local battery information, performing state discrimination, thermal management control and balance control on a local battery pack, uploading the local battery information and responding to remote control, and processing a current signal acquired by the direct current circuit breaker (20).
2. The energy storage system high-voltage box according to claim 1, wherein the terminals comprise a battery pack general positive terminal, a battery pack general negative terminal, an external general positive terminal and an external general negative terminal;
the external main positive terminal and the battery pack main positive terminal form a positive electrode electric loop;
the external total negative connecting terminal and the battery pack total negative connecting terminal form a negative electric loop;
the direct current breaker (20) is connected into an electric loop.
3. The energy storage system high pressure tank of claim 2, characterized in that a fuse (80) is further provided in the tank (10);
and the fuse (80) is connected into the positive electrode electric loop and is used for short-circuit and over-current of the energy storage system and backup protection.
4. The energy storage system high pressure tank of claim 2, wherein the contactor comprises a main positive contactor (30) and a main negative contactor (40);
the main positive contactor (30) is connected into the positive electrical circuit, and the on or off state of the main positive contactor (30) is uploaded to the battery management unit (130);
the main negative contactor (40) is connected into the negative electrical circuit, and the connection or disconnection state of the main negative contactor (40) is uploaded to the battery management unit (130).
5. The energy storage system high pressure tank of claim 2, wherein the dc current sensor (70) is connected into the negative electrical circuit.
6. The energy storage system high pressure tank of claim 4,
the main positive contactor (30) is connected with a protection loop in parallel;
the protection circuit comprises a pre-charging resistor (60) and a pre-charging contactor (50).
7. The energy storage system high-pressure tank as claimed in claim 2, characterized in that a main positive busbar assembly (90) and a main negative busbar assembly (100) are further arranged in the tank body (10);
the main positive busbar component (90) is connected with the positive electrode electric circuit;
the main negative busbar assembly (100) is connected with the negative electrode electric loop.
8. The energy storage system high-pressure tank as claimed in claim 1, characterized in that a power module is further arranged in the tank body (10) to independently supply power to the local battery pack cooling fan and the battery management unit (130);
the power supply module includes a first power supply module (110) and a second power supply module (120).
9. The energy storage system high pressure tank of claim 1,
the box body (10) also comprises a bottom plate, side plates, a cover plate and a rear panel;
the side plate is provided with heat dissipation holes.
10. The energy storage system high pressure tank of claim 1,
and a panel of the box body (10) is also provided with a signal interface, an indicator light, an insulation detection interface and a battery management unit communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221086884.3U CN218770742U (en) | 2022-05-08 | 2022-05-08 | High-pressure tank of energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221086884.3U CN218770742U (en) | 2022-05-08 | 2022-05-08 | High-pressure tank of energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218770742U true CN218770742U (en) | 2023-03-28 |
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ID=85643139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221086884.3U Active CN218770742U (en) | 2022-05-08 | 2022-05-08 | High-pressure tank of energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218770742U (en) |
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2022
- 2022-05-08 CN CN202221086884.3U patent/CN218770742U/en active Active
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