CN214013902U - Battery system electrical circuit matched with UPS and provided with pre-charging loop - Google Patents
Battery system electrical circuit matched with UPS and provided with pre-charging loop Download PDFInfo
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- CN214013902U CN214013902U CN202022738783.7U CN202022738783U CN214013902U CN 214013902 U CN214013902 U CN 214013902U CN 202022738783 U CN202022738783 U CN 202022738783U CN 214013902 U CN214013902 U CN 214013902U
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Abstract
The utility model discloses a match UPS area pre-charge battery system electric circuit in return circuit, include the battery module who is connected with the direct current electricity, battery module is including shunt, battery, fuse, the relay that connects gradually the electricity, battery management system signal control relay, the relay includes main relay and the pre-charge relay that connects in parallel, and the pre-charge return circuit concatenates the pre-charge resistance. The utility model discloses increase the pre-charge return circuit to reduce the load that the battery takes and relay damage probability when using for perception load or battery module parallel operation.
Description
Technical Field
The utility model relates to a UPS technical field, more specifically say, it relates to a match UPS and take battery system electrical circuit in pre-charge return circuit.
Background
Ups (uninterruptible Power system), i.e., an uninterruptible Power supply, is a constant voltage and constant frequency uninterruptible Power supply that includes an energy storage device and an inverter as a main component. The device is mainly used for providing uninterrupted power supply for a single computer, a computer network system or other power electronic equipment. When the mains supply input is normal, the UPS supplies the mains supply to the load for use after stabilizing the voltage of the mains supply, and the UPS is an alternating current mains supply voltage stabilizer and also charges a built-in battery; when the commercial power is interrupted (power failure in accident), the UPS immediately supplies 220V alternating current to the load by the electric energy of the battery in the UPS through an inversion conversion method, so that the load can maintain normal work and the software and hardware of the load are protected from being damaged. In general, as shown in fig. 1, an electrical circuit of a battery system has the following problems: firstly, the load carried by the battery can not be an inductive load, because the front end of the inductive load is provided with a large capacitor, when the battery is started in a cold state, the capacitor has no charge or only has low residual voltage, two ends of the breaker are directly connected with the capacitor, the voltage of the battery is high, the voltage of the load capacitor is close to 0, namely instantaneous short circuit, the load resistor is only the resistor of a lead and a relay contact, and is generally far less than 20m omega. According to ohm's law, the loop instantaneous current is extremely large, and the probability of relay damage is very large; when two battery modules are used in parallel, voltage difference exists between the modules, and in the instant of attracting the relay, the voltage difference is equivalent to instant short, the instant current of a loop is also extremely large, and the probability of damage of a circuit breaker is very large. When the battery is charged to a single-string voltage to reach a protection value, the battery management system controls the relay to be disconnected for protection, the load cannot work normally at the moment, the equipment needs to be watched by a person, the relay can be attracted only by manually restarting the equipment, and the load can be normally used.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide a matched UPS electrical circuit with a pre-charging loop for a battery system, which solves the problems, and the pre-charging loop is added to reduce the damage probability of a relay when the load carried by a battery is inductive load or the parallel operation of battery modules is used; the main relay is divided into a charging relay and a discharging relay which separately control a charging loop and a discharging loop, is unattended, and can normally discharge after charging protection.
In order to achieve the above purpose, the utility model provides a following technical scheme:
match UPS area pre-charge circuit's battery system electric circuit, include the battery module who is connected with the direct current electricity, battery module is including shunt, battery, fuse, the relay of electricity connection in proper order, battery management system signal control relay, its characterized in that: the relay comprises a main relay and a pre-charging relay which are connected in parallel, and the pre-charging loop is connected with a pre-charging resistor in series.
The utility model discloses further improve technical scheme be, pre-charge resistance is 30-200 omega. At the moment of switching on, the maximum current flowing through the pre-charging circuit into the load capacitor is very small, so that the safety of the pre-charging circuit can be protected.
The utility model discloses further improve technical scheme and be, main relay includes charging relay and discharging relay, and charging relay place charging circuit and discharging relay place discharging circuit and connect, and charging circuit concatenates backward diode A in the charging relay front side, and the circuit that discharges concatenates forward diode B in the discharging relay front side.
The utility model discloses further improve technical scheme be, a plurality of battery module connects the back and is connected with the direct current electricity. The battery modules can be used in parallel.
The utility model discloses beneficial effect:
one, the utility model discloses increase the preliminary filling return circuit, when the load that the battery was taken was the inductive load or two above battery module parallel operation, let to have the great preliminary filling circuit of impedance to put through earlier, voltage on the inductive load electric capacity is more and more high (the pre-charge current is more and more little), and when being close battery voltage, or when two battery module voltages were close, the battery management system cut off the preliminary filling relay, put through the main relay again, no longer have the heavy current impact, can effectively protect the main relay and damage.
The utility model discloses main relay divide into charging relay and discharge relay branch control charging circuit and discharge circuit, battery start state, and battery management system control actuation pre-charge relay earlier, and after the pre-charge was accomplished, battery management system actuation charging relay, discharge relay, load start can normally work; when the battery is charged to a single string of voltage to a protection value, the battery management system controls the charging relay to be disconnected for protection, the discharging relay is in an attraction state at the moment, the load can work normally without restarting the equipment manually, and when the battery voltage is lower than a set value, the battery management system controls the charging relay to be attracted, and the battery can be charged normally at the moment. The device is unattended, and can normally discharge after charging protection.
Drawings
FIG. 1 is an electrical schematic of a prior art battery system;
fig. 2 is an electrical schematic diagram of the battery system of the present invention.
Detailed Description
As shown in fig. 2, the utility model discloses a plurality of battery module connects back and direct current electric connection, and every battery module is including shunt 1, battery 2, fuse 3, the relay that connects gradually the electricity, 5 signal control relays of battery management system, the relay includes charging relay 41, discharge relay 42 and the pre-charge relay 43 that connects, and the pre-charge return circuit concatenates 30-200 omega's pre-charge resistance 44, and the charging circuit concatenates backward diode A45 in charging relay 41 front side, and the forward diode B46 is concatenated in the discharge relay 42 front side to the discharge return circuit.
The working principle is as follows:
the load that the battery was taken is the inductive load, the inductive load end has great electric capacity C, when cold starting, there is not electric charge or only very low residual voltage on C, battery management system BMS control lets to have the great pre-charge circuit of impedance switch on earlier, the maximum current that flows through the pre-charge circuit and gets into electric capacity C is very little, along with the voltage on the load electric capacity C is higher and higher (pre-charge current is more and more little), when being close to battery voltage, battery management system BMS control cuts off the pre-charge, switch on main relay, no longer have heavy current to strike can effectively protect charging relay and discharge relay.
When more than two battery modules are used in parallel, voltage difference exists between the modules. The battery management system BMS control has the great pre-charge circuit of impedance to put through earlier, and when two battery module voltages were close, the battery management system BMS cut off the pre-charge relay, puts through main relay again, no longer has heavy current to strike, can effectively protect main relay and damage.
The utility model discloses main relay divide into charging relay and discharge relay branch accuse charge circuit and discharge circuit, battery start state, and battery management system BMS controls actuation pre-charge relay earlier, and after the pre-charge was accomplished, battery management system actuation charging relay, discharge relay, load start can normally work; when the battery is charged to a single string of voltage and reaches a protection value, the battery management system BMS controls the charging relay to be disconnected for protection, the discharging relay is in an attraction state at the moment, the load can work normally, the equipment does not need to be restarted manually, when the battery voltage is lower than a set value, the battery management system BMS controls the attraction of the charging relay, and the battery can be charged normally at the moment. The device is unattended, and can normally discharge after charging protection.
Claims (4)
1. Match UPS area pre-charge battery system electric circuit in return circuit, include the battery module who is connected with the direct current electricity, battery module is including shunt (1), battery (2), fuse (3), the relay that connects gradually the electricity, battery management system (5) signal control relay, its characterized in that: the relay comprises a main relay and a pre-charging relay (43) which are connected in parallel, and a pre-charging loop is connected with a pre-charging resistor (44) in series.
2. The matched UPS pre-charge circuit battery system electrical circuit of claim 1, wherein: the pre-charging resistor (44) is 30-200 omega.
3. The matched UPS pre-charge circuit battery system electrical circuit of claim 1, wherein: the main relay comprises a charging relay (41) and a discharging relay (42), a charging loop where the charging relay is located is connected with a discharging loop where the discharging relay is located in parallel, the charging loop is connected with a backward diode A (45) in series on the front side of the charging relay (41), and the discharging loop is connected with a forward diode B (46) in series on the front side of the discharging relay (42).
4. A matched UPS battery system electrical circuit with precharge circuit according to claim 1, 2 or 3, wherein: and the plurality of battery modules are electrically connected with the direct current after being connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022738783.7U CN214013902U (en) | 2020-11-24 | 2020-11-24 | Battery system electrical circuit matched with UPS and provided with pre-charging loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022738783.7U CN214013902U (en) | 2020-11-24 | 2020-11-24 | Battery system electrical circuit matched with UPS and provided with pre-charging loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214013902U true CN214013902U (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022738783.7U Active CN214013902U (en) | 2020-11-24 | 2020-11-24 | Battery system electrical circuit matched with UPS and provided with pre-charging loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214013902U (en) |
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2020
- 2020-11-24 CN CN202022738783.7U patent/CN214013902U/en active Active
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