CN211295793U - High-voltage box power supply system - Google Patents
High-voltage box power supply system Download PDFInfo
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- CN211295793U CN211295793U CN202020136656.7U CN202020136656U CN211295793U CN 211295793 U CN211295793 U CN 211295793U CN 202020136656 U CN202020136656 U CN 202020136656U CN 211295793 U CN211295793 U CN 211295793U
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Abstract
The utility model discloses a high-pressure box power supply system, a serial communication port, include: a power distribution cabinet; the switching power supply is arranged in the power distribution cabinet and is electrically connected with the alternating current output end of the power distribution cabinet; and the high-voltage box is electrically connected with the output end of the switching power supply. Through setting up switching power supply at the switch board, the high voltage of switch board passes through switching power supply and exports the high-voltage box and become the low pressure, can not cause danger to the human body, eliminates the potential safety hazard that exists when overhauing the high-voltage box.
Description
Technical Field
The utility model relates to a high-pressure box power supply field, in particular to high-pressure box power supply system.
Background
Lithium batteries and lead storage batteries are one of the core components of energy storage systems and are the energy center of the energy storage systems. The high-voltage box is used as an energy management control device of a battery, and the power supply safety and reliability are particularly important.
The high-voltage box integrates a circuit breaker for maintenance, a BCMU, a direct-current fast fuse, a high-voltage direct-current contactor, a shunt, a switching power supply and the like, and realizes the functions of state detection, power-on control, fault disconnection, calculation of SOC of the battery cluster, current detection, voltage detection, communication with a PCS and an EMS and the like. The existing high-voltage box power supply scheme is that an AC220V power supply is taken from a power distribution cabinet to a switching power supply in a box, and the switching power supply converts AC220V into DC24V to supply power to devices. Inside and outside wiring of high-voltage box adopt to inserting the terminal, when a certain high-voltage box overhauls, the operating procedure as follows: controlling PCS to stop, disconnecting 8 high-voltage boxes in a power distribution cabinet where the high-voltage boxes are located), switching off a power switch of the high-voltage boxes, pulling out a power line terminal, pulling out the high-voltage boxes to plug and pull out external connection terminals, and drawing out the high-voltage boxes to overhaul. However, in actual work, in order to not influence the operation of other normal high-voltage boxes, engineering and debugging personnel do not disconnect a power switch on a power distribution cabinet firstly, but directly disconnect the switch of the high-voltage box, and then directly pull out the plug-in terminal. Therefore, the potential safety hazard is very large, once a person accidentally touches the metal part of the terminal, the risk of electric shock exists, the casualty event of the person is caused, and if the unplugged plug is not placed properly, the metal part is lapped with the metal parts of other devices, and the potential safety hazard of short circuit and electric leakage exists.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a high-pressure box power supply system can eliminate the potential safety hazard when high-pressure box overhauls.
According to the utility model discloses a high-pressure box power supply system, a serial communication port, include: a power distribution cabinet; the switching power supply is arranged in the power distribution cabinet and is electrically connected with the alternating current output end of the power distribution cabinet; and the high-voltage box is electrically connected with the output end of the switching power supply.
According to the utility model discloses high-pressure box power supply system has following beneficial effect at least: through setting up switching power supply at the switch board, the high voltage of switch board passes through switching power supply and exports the high-voltage box and become the low pressure, can not cause danger to the human body, eliminates the potential safety hazard that exists when overhauing the high-voltage box.
According to some embodiments of the utility model, be equipped with the plug terminal on the high-pressure box, switching power supply pass through the wire with the plug terminal is connected.
According to some embodiments of the utility model, be equipped with ship type switch on the high-pressure box, ship type switch with the plug terminal is connected, ship type switch is used for control the break-make that the high-pressure box inserts the power.
According to some embodiments of the invention, the high voltage box comprises a circuit breaker, a shunt, a direct current fast fuse, an intermediate relay, a direct current contactor and a resistor.
According to some embodiments of the invention, the switching power supply is an AC220V/DC24V switching power supply.
Additional aspects and advantages of the invention 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 invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a block diagram of a power supply system of a high-voltage box according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the high-voltage box according to the embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, a high voltage box power supply system, comprising: a power distribution cabinet 1; the switching power supply 2 is arranged in the power distribution cabinet 1 and is electrically connected with the 220V alternating current output end of the power distribution cabinet 1; and the high-voltage box 3 is electrically connected with the 24V output end of the switching power supply 2. This embodiment sets up in switch board 1 through switching power supply 2 that will set up originally at high-voltage box 3, and switch board 1's high voltage passes through switching power supply 2 and exports the high-voltage box 3 time change to the low pressure, and the electric current of high-voltage box 3 can not cause danger to the human body when overhauing, eliminates the potential safety hazard that exists when overhauing high-voltage box 3. The switching power supply 2 only needs to be arranged in the power distribution cabinet 1, the installation position is not limited, the electrical connection relation between the switching power supply 2 and the power distribution cabinet 1 and between the switching power supply 2 and the high-voltage box 3 is the same as that of the existing scheme, and excessive description is not carried out in the embodiment.
Referring to fig. 2, the high voltage box 3 includes a circuit breaker 31, a shunt 32, a dc fast fuse 33, an intermediate relay 34, a dc contactor 35 and a resistor 36, the high voltage box 3 does not need to be provided with a switching power supply 2, the size is reduced, the high voltage box 3 is further provided with a plug terminal, and the switching power supply 2 is connected with the plug terminal through a wire. The high-voltage box 3 is provided with a ship-shaped switch, the ship-shaped switch is connected with the plug-in terminal, and the ship-shaped switch is used for controlling the connection and disconnection of the high-voltage box 3 to a power supply and cutting off the input power supply of the high-voltage box 3 through the ship-shaped switch. The switching power supply 2 adopts an AC220V/DC24V switching power supply, the voltage adjustable range is 21.6V-28.8V, the maximum power used by the equipment is 285W, and the alternating current output of the power distribution cabinet 1 can be converted into a direct current power supply. The embodiment of the utility model provides a with arranging in AC220V DC24V switching power supply moves to switch board 1 in the high-voltage box 3, DC24V power connects to high-voltage box 3 to the plug terminal through RVV2 a 1.5 square wire.
The following is a calculation of whether the DC24V power supply voltage drop meets the device power requirements in combination with actual conditions. The AC220V/DC24V switching power supply selects 350W/24V, the voltage adjustable range is 21.6V-28.8V, and the maximum power of the device is 285W.
The wiring distance from the power distribution cabinet 1 to the high-voltage box 3 is 11 meters furthest, a cable with the square of RVV2 x 1.5 is adopted, and the resistance of the cable is 13.7 omega/km; voltage drop of the current section
The high-voltage box 3 supplies power to a BMU in the PACK for a maximum distance of 17 meters, and a cable with the square of RVV2 x 1.0 is adopted, and the resistance of the cable is 20 omega/km; pressure drop in this section
The working voltage range of the contactor is 75% -130% Ue which is 18V-31.2V;
the BCMU working voltage range DC24V +/-10% and the working voltage 21.6-26.6V;
the BMU working voltage range DC24V + -20%, the working voltage 19.2V-28.8V;
24-1.8 ═ 22.2V >21.6V, and the voltage drop from the 24V supply to the high voltage box 3 did not affect device operation.
High voltage box 3 to battery cluster power supply: 22.2-4 ═ 18.2 < 19.2V; the minimum working voltage of the BMU cannot be met due to the voltage of less than 1V. The solution is as follows: theoretically, raising the power supply side voltage to 1V can satisfy the requirement. Other losses and voltage drops are taken into account to boost the switching power supply 2 output DC24V to DC 26V. The specific value can be adjusted according to actual conditions.
And whether the recalculation power meets the following conditions: 285/24 | -26 ≦ 309W ≦ 350W.
Claims (5)
1. A high voltage box power supply system, comprising:
a power distribution cabinet (1);
the switching power supply (2) is arranged in the power distribution cabinet (1) and is electrically connected with the alternating current output end of the power distribution cabinet (1);
the high-voltage box (3), the high-voltage box (3) with the output electric connection of switching power supply (2).
2. A high voltage box power supply system according to claim 1, characterized in that: the high-voltage box (3) is provided with a plug terminal, and the switching power supply (2) is connected with the plug terminal through a lead.
3. A high voltage box power supply system according to claim 2, characterized in that: the high-voltage box (3) is provided with a ship-shaped switch, the ship-shaped switch is connected with the plug terminal, and the ship-shaped switch is used for controlling the connection and disconnection of the high-voltage box (3) to the power supply.
4. A high voltage box power supply system according to claim 1, characterized in that: the high-voltage box (3) comprises a circuit breaker (31), a shunt (32), a direct-current fast fuse (33), an intermediate relay (34), a direct-current contactor (35) and a resistor (36).
5. A high voltage box power supply system according to claim 1, characterized in that: the switching power supply (2) is an AC220V/DC24V switching power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020136656.7U CN211295793U (en) | 2020-01-20 | 2020-01-20 | High-voltage box power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020136656.7U CN211295793U (en) | 2020-01-20 | 2020-01-20 | High-voltage box power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211295793U true CN211295793U (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020136656.7U Active CN211295793U (en) | 2020-01-20 | 2020-01-20 | High-voltage box power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211295793U (en) |
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2020
- 2020-01-20 CN CN202020136656.7U patent/CN211295793U/en active Active
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