CN212137299U - Parallel high-voltage control box of battery system - Google Patents
Parallel high-voltage control box of battery system Download PDFInfo
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- CN212137299U CN212137299U CN201921944605.0U CN201921944605U CN212137299U CN 212137299 U CN212137299 U CN 212137299U CN 201921944605 U CN201921944605 U CN 201921944605U CN 212137299 U CN212137299 U CN 212137299U
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Abstract
The utility model relates to a parallelly connected high-voltage control case of battery system, include: the system comprises a discharge relay, a charge relay, a pre-charge resistor, a fuse, a discharge diode, a charge diode, a circuit breaker and a current sensor; the utility model discloses a circuit breaker, including discharge relay and charging relay, pre-charge relay and pre-charge resistance, discharge relay and charging relay establish ties, pre-charge relay and pre-charge resistance establish ties, discharge relay and charging relay establish ties the back and establish ties the back parallelly connected with pre-charge relay and pre-charge resistance again, the diode that charges is parallelly connected with the discharge relay, the diode that discharges is parallelly connected with the charging relay, the fuse establishes ties on the circuit, the circuit breaker establishes ties on the circuit, current sensor establishes ties on the circuit. Compared with the prior art, the high-voltage control box can realize the parallel control of a plurality of high-voltage lithium battery systems and can realize the work matching with the switching power supply.
Description
Technical Field
The utility model belongs to lithium cell design production field, concretely relates to parallelly connected high-voltage control case of battery system.
Background
The lithium ion battery is a novel storage battery product which is developed rapidly recently, is green and environment-friendly and belongs to a new energy product. However, the lithium battery has potential safety hazards, and the overcharge of the lithium battery can cause the lithium battery to be burnt and exploded, so that great personal damage and financial loss are brought; over-discharge of lithium batteries can lead to a reduction in the service life of the lithium battery.
When the lithium ion battery is applied to the parallel connection of a high-voltage system, how to effectively control the charging and discharging of the battery is particularly important. The prior art can not realize the parallel control of a plurality of high-voltage lithium battery systems and can not realize the work matching with a switching power supply.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a parallelly connected high-voltage control case of battery system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the method comprises the following steps: the system comprises a discharge relay, a charge relay, a pre-charge resistor, a fuse, a discharge diode, a charge diode, a circuit breaker and a current sensor; the utility model discloses a circuit breaker, including discharge relay and charging relay, pre-charge relay and pre-charge resistance, discharge relay and charging relay establish ties, pre-charge relay and pre-charge resistance establish ties, discharge relay and charging relay establish ties the back and establish ties the back parallelly connected with pre-charge relay and pre-charge resistance again, the diode that charges is parallelly connected with the discharge relay, the diode that discharges is parallelly connected with the charging relay, the fuse establishes ties on the circuit, the circuit breaker establishes ties on the circuit, current sensor establishes ties on the circuit.
The discharging relay is in a closed state, the charging relay is in a closed state, and the pre-charging relay is in an open state.
The charging diode is communicated from the anode (P +) of the switching power supply to the anode (B +) of the battery, and the discharging diode is communicated from the anode (B +) of the battery to the anode (P +) of the switching power supply.
When the current exceeds a specified value, the fuse protection circuit fuses the melt by the heat generated by the fuse protection circuit.
The circuit breaker protection circuit can break a circuit when the circuit is subjected to overload, short circuit and under-voltage protection.
When a single battery system is in an undervoltage state, the discharging relay is disconnected, at the moment, the circuit is characterized in that the fuse is connected with the charging diode in series, the charging diode is connected with the charging relay in series, the charging relay is connected with the circuit breaker in series, at the moment, the charging diode is connected with the circuit breaker in series, no current exists in the circuit because the charging diode is connected in series in the control circuit, but the total voltage of the battery can be measured by P + \ P-, and at the moment, the battery.
When a single battery system is in a full-charge state, the charging relay is disconnected, at the moment, the circuit is characterized in that the fuse is connected with the discharging diode in series, the discharging diode is connected with the discharging relay in series, the discharging relay is connected with the circuit breaker in series, at the moment, because the diode is connected in series in the control circuit, current flows from the anode of the power supply to the cathode of the power supply, the total voltage of the battery can be measured by P + \ P-, and at the moment, the battery system can not be.
Meanwhile, when a plurality of systems are connected in parallel, one battery system falls behind, the pre-charging relay is closed, the charging relay and the discharging relay are both disconnected, at the moment, the circuit is formed in a manner that the fuse is connected with the pre-charging relay in series, the pre-charging relay is connected with the pre-charging resistor in series, the pre-charging resistor is connected with the circuit breaker in series, and current flows to the positive pole of the battery from the positive pole of the power supply, so that the battery is balanced, and the consistency of.
Compared with the prior art, the utility model discloses the beneficial effect who reaches is:
1. the parallel control of a plurality of high-voltage lithium battery systems can be realized, and the work matching with a switching power supply can be realized.
2. The charging and discharging management of the battery system is realized through the two diodes and the charging and discharging relay, and meanwhile, the backward battery system in the parallel system is subjected to consistency management through the pre-charging resistor, so that the charging and discharging control performance and consistency of the plurality of battery systems in parallel connection can be ensured.
3. The overcharge and overdischarge risks of the battery are reduced, the service life and safety of a battery system are facilitated, and meanwhile the performance consistency and the cycle life of the battery can be improved.
Drawings
FIG. 1 is an electrical schematic diagram of the present invention;
in fig. 1: 1-discharge relay, 2-charge relay, 3-precharge relay, 4-precharge resistor, 5-fuse, 6-charge diode, 7-discharge diode, 8-breaker, 9-current sensor.
Detailed Description
In order to understand the features and technical contents of the present invention in more detail, the following description is given in conjunction with the accompanying drawings, which are only used for reference and not for limiting the present invention.
Referring to fig. 1, a parallel high voltage control box of a battery system includes: the system comprises a discharging relay 1, a charging relay 2, a pre-charging relay 3, a pre-charging resistor 4, a fuse 5, a discharging diode 6, a charging diode 7, a circuit breaker 8 and a current sensor 9; the utility model discloses a safety protection device, including discharge relay 1, pre-charge relay 3, pre-charge relay 4, discharge relay 1 and charge relay 2, pre-charge relay 3 and pre-charge relay 4 are established ties after establishing ties, it is parallelly connected with pre-charge relay 3 and pre-charge relay 4 again to discharge relay 1, charge diode 6 is parallelly connected with discharge relay 1, discharge diode 7 is parallelly connected with charge relay 2, fuse 5 establishes ties on the circuit, circuit breaker 8 establishes ties on the circuit, current sensor 9 establishes ties on the circuit.
The discharging relay 1 is in a closed state, the charging relay 2 is in a closed state, and the pre-charging relay 3 is in an open state.
The charging diode 6 is communicated from the anode (P +) of the switching power supply to the anode (B +) of the battery, and the discharging diode 7 is communicated from the anode (B +) of the battery to the anode (P +) of the switching power supply.
The fuse 5 protects the circuit, and fuses the fuse body by the heat generated by the fuse when the current exceeds a specified value.
The circuit breaker 8 protects the circuit, and the circuit can be disconnected when the circuit is subjected to overload, short circuit and undervoltage protection.
When a single battery system is in an undervoltage state, the discharging relay 1 is disconnected, at the moment, the circuit is characterized in that the fuse 5 is connected with the charging diode 7 in series, the charging diode 7 is connected with the charging relay 2 in series, and the charging relay 2 is connected with the circuit breaker 8 in series, at the moment, because the charging diode 7 is connected with the control circuit in series, no current exists in the circuit, but the total voltage of the battery can be measured by P + \ P-, and at the moment, the battery system cannot discharge.
When a single battery system is in a full-charge state, the charging relay 2 is disconnected, at the moment, the circuit is formed in a manner that the fuse 5 is connected with the discharging diode 6 in series, the discharging diode 6 is connected with the discharging relay 1 in series, and the discharging relay 1 is connected with the circuit breaker 8 in series, at the moment, because the discharging diode 6 is connected in series in the control circuit, current flows from the positive pole of the power supply to the negative pole of the power supply, the total voltage of the battery can be measured by P + \ P-, and at the moment, the.
Meanwhile, when a plurality of systems are connected in parallel, one battery system falls behind, the pre-charging relay 3 is closed, the charging relay 2 and the discharging relay 1 are both disconnected, at the moment, the circuit is formed, the fuse 5 is connected with the pre-charging relay 3 in series, the pre-charging relay 3 is connected with the pre-charging resistor 4 in series, the pre-charging resistor 4 is connected with the circuit breaker 8 in series, the positive pole of the current charging source flows to the negative pole of the power source, and the battery is balanced to improve the consistency of the whole system.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A parallel high-voltage control box of a battery system comprises: the device comprises a discharging relay (1), a charging relay (2), a pre-charging relay (3), a pre-charging resistor (4), a fuse (5), a charging diode (6), a discharging diode (7), a circuit breaker (8) and a current sensor (9); the charging relay is characterized in that the discharging relay (1) is connected with the charging relay (2) in series, the pre-charging relay (3) is connected with the pre-charging resistor (4) in series, the discharging relay (1) is connected with the charging relay (2) in series and then connected with the pre-charging relay (3) and the pre-charging resistor (4) in series in parallel, the charging diode (6) is connected with the discharging relay (1) in parallel, the discharging diode is connected with the charging relay (2) in parallel, the fuse (5) is connected on the circuit in series, the circuit breaker (8) is connected on the circuit in series, and the current sensor (9) is connected on the circuit in series.
2. The parallel high-voltage control box of the battery system according to claim 1, characterized in that: the discharging relay (1) is in a closed state, the charging relay (2) is in a closed state, and the pre-charging relay (3) is in an open state.
3. The parallel high-voltage control box of the battery system according to claim 1, characterized in that: the charging diode (6) is communicated from the anode (P +) of the switch power supply to the anode (B +) of the battery, and the discharging diode (7) is communicated from the anode (B +) of the battery to the anode (P +) of the switch power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921944605.0U CN212137299U (en) | 2019-11-12 | 2019-11-12 | Parallel high-voltage control box of battery system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921944605.0U CN212137299U (en) | 2019-11-12 | 2019-11-12 | Parallel high-voltage control box of battery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181205A (en) * | 2019-11-12 | 2020-05-19 | 双登集团股份有限公司 | Parallel high-voltage control box of battery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181205A (en) * | 2019-11-12 | 2020-05-19 | 双登集团股份有限公司 | Parallel high-voltage control box of battery system |
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