Redundant charging circuit applied to charging of storage battery of generator set

Abstract

The utility model belongs to the field of redundant circuits, and particularly relates to a redundant circuit applied to charging a storage battery of a generator set, which comprises a main charger, a standby charger and a direct current contactor, an output positive electrode of the main charger is connected with a normally closed contact of the direct current contactor, and a positive electrode of the standby charger is connected with a normally open contact of a switching contactor. The output end of the direct current contactor is connected with the positive electrode of the storage battery, and the negative electrode of the storage battery is connected with the negative electrodes of the main charger and the standby charger. The two ends of the storage battery are connected with a redundant charging control circuit in parallel. The redundant charging control circuit comprises a direct current contactor control coil and a fault feedback switch which are connected in series. According to the invention, the charging loop can be automatically controlled to be switched from the fault main charger to the standby charger for continuous charging.

Description

Technical Field

[0001] The utility model belongs to the technical field of redundant charging circuits, and in particular relates to a redundant charging circuit used for charging storage batteries of a generator set. Background Art

[0002] As the main power source of the generator set starting circuit, the battery will fail to start when the battery power is insufficient, so the battery needs to be charged regularly. During the battery charging process, if the battery charging device fails, the battery will not be able to charge normally. The charging circuit needs to be inspected and repaired to find the cause and recharge the battery, which seriously affects work efficiency. Summary of the invention

[0003] The utility model aims to provide a redundant charging circuit for charging the battery of a generator set, which can actively detect the abnormality of the main charger and switch to the backup charger to continue charging, thereby ensuring the continuity of operation.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A redundant charging circuit for charging a generator set battery comprises a main charger, a backup charger and a DC contactor, wherein the DC contactor comprises a DC contactor control coil and a DC contactor contact, wherein the DC contactor contact comprises a DC contactor normally open contact and a DC contactor normally closed contact, wherein the output positive pole of the main charger is connected to the positive pole of the battery via the DC contactor normally closed contact, wherein the output positive pole of the backup charger is connected to the positive pole of the battery via the DC contactor normally open contact, wherein the negative pole of the battery is connected to the negative poles of the main charger and the backup charger respectively, wherein both ends of the battery are connected to a redundant charging control circuit, wherein the redundant charging control circuit comprises a DC contactor control coil and a fault feedback switch connected in series, wherein a control module is provided in the main charger, wherein the control module is connected to a controlled end of the fault feedback switch.

[0006] Preferably, the redundant charging control circuit further includes an anti-reverse diode, and the anti-reverse diode is connected in series with the DC contactor control coil and the fault feedback switch.

[0007] Preferably, the input ends of the main charger and the backup charger are connected to the mains power supply via a live wire and a neutral wire respectively.

[0008] Preferably, a first bipolar miniature circuit breaker is connected in series between the main charger and the mains, and a second bipolar miniature circuit breaker is connected in series between the backup charger and the mains.

[0009] Preferably, four single-pole miniature circuit breakers are provided on the live wire and the neutral wire of the main charger circuit and the backup charger.

[0010] The present application can control the fault feedback switch to automatically close and energize the redundant charging control circuit when the main charger fails. Under the attraction of the linear contactor coil, the DC contactor contacts are switched from the positive output terminal of the main charger to the positive output terminal of the backup charger, so that the battery charging circuit switches from the main charger to the backup charger to continue to provide DC power to the battery, thereby avoiding interruption of the charging operation and improving the circuit fault tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of a redundant charging circuit for a battery pack of a generator set of the utility model; DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The terms such as "upper", "lower", "left", "right" and the like cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship shall also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0013] This embodiment provides a redundant charging circuit for charging the battery of a generator set, such as Figure 1As shown, it includes a main charger, a backup charger, a battery, and a DC contactor. The DC contactor is composed of a DC contactor control coil KM and a DC contactor contact. The DC contactor contact is composed of a DC contactor normally closed contact KMa and a DC contactor normally open contact KMb. The battery is composed of two batteries GB1 and GB2 connected in series to form a battery pack GB1-2. The output positive pole of the main charger is connected to the positive pole of the battery pack GB1-2 through the DC contactor normally closed contact KMa, the positive pole of the backup charger is connected to the positive pole of the battery pack GB1-2 through the DC contactor normally open contact KMb, and the negative pole of the battery pack is connected to the negative pole of the main charger and the negative pole of the backup charger respectively. The two ends of the battery pack GB1-2 are also connected to a redundant charging control circuit, which includes a DC contactor control coil KM and a fault feedback switch K1 connected in series, and also includes an anti-reverse diode, which is connected in series with the DC contactor control coil KM and the fault feedback switch K1. The main charger is provided with a control module, which is connected to the controlled end of the fault feedback switch K1. The control module can use a PLC or other programmable controller to switch the state of the fault feedback switch K1 closed and disconnected. The positive pole of the battery pack GB1-2 is also short-circuited with the starter motor, and the negative pole is grounded. The battery pack GB1-2 can supply the power required by the starter motor. The input ends of the main charger and the backup charger are connected to the mains power supply. In order to protect the circuit, a first miniature circuit breaker 1QF is connected in series between the main charger and the mains, and a second miniature circuit breaker 2QF is connected in series between the backup charger and the mains. However, there are many types of miniature circuit breakers, such as single-pole, double-pole, and four-pole. For the safety of each live wire and neutral wire in the circuit, four single-pole miniature circuit breakers can be used for the main charger circuit and the backup charger circuit, respectively, connected to each live wire and neutral wire, or two double-pole miniature circuit breakers 1QF and 2QF can be used as in this embodiment to connect the live wire and neutral wire of the main charger and the live wire and neutral wire of the backup charger. Those skilled in the art should know that the type of miniature circuit breaker is not used to limit the present utility model, and other types of miniature circuit breakers are also within the protection scope of the present utility model.

[0014] The working principle of this embodiment is as follows: when the main charger is used for normal charging, the first miniature circuit breaker 1QF and the second miniature circuit breaker 2QF are in a closed state, the fault feedback switch K1 is in an open state, the redundant charging control circuit is disconnected and not energized, the output positive pole of the main charger is connected to the normally closed contact KMa of the DC contactor, and the main charger charges the battery pack GB1-2. When the main charger fails, the main charger control module sends a fault signal, the fault feedback switch K1 is converted from an open state to a closed state, the redundant charging control circuit formed by connecting the DC contactor coil kM and the fault feedback switch K1 becomes a path, the DC contactor coil KM is energized to generate electromagnetic force, the DC contactor normally closed contact KMa is disconnected under the attraction of the coil, the DC contactor normally open contact KMb is converted to a closed state, and the battery pack GB1-2 is switched from the main charger to the standby charger for charging.

[0015] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the protection scope of the present utility model patent application.

Claims

1. A redundant charging circuit for charging a generator set battery, comprising a main charger, a backup charger, and a DC contactor, wherein the DC contactor is composed of a DC contactor control coil and a DC contactor contact, wherein the DC contactor contact is composed of a DC contactor normally open contact and a DC contactor normally closed contact, wherein the output positive pole of the main charger is connected to the positive pole of the battery through the DC contactor normally closed contact, and the output positive pole of the backup charger is connected to the positive pole of the battery through the DC contactor normally open contact, wherein the negative pole of the battery is respectively connected to the negative poles of the main charger and the backup charger, wherein both ends of the battery are connected to a redundant charging control circuit, wherein the redundant charging control circuit comprises a DC contactor control coil and a fault feedback switch connected in series, wherein a control module is provided in the main charger, and wherein the control module is connected to a controlled end of the fault feedback switch.

2. A redundant charging circuit for charging a generator battery according to claim 1, characterized in that: The redundant charging control circuit also includes an anti-reverse diode, which is connected in series with the DC contactor control coil and the fault feedback switch.

3. A redundant charging circuit for charging a battery of a generator set according to claim 1, characterized in that: The input ends of the main charger and the standby charger are connected to the mains power supply through a live wire and a neutral wire respectively.

4. A redundant charging circuit for charging a battery of a generator set according to claim 3, characterized in that: A first bipolar miniature circuit breaker is connected in series between the main charger and the mains, and a second bipolar miniature circuit breaker is connected in series between the standby charger and the mains.

5. A redundant charging circuit for charging a battery of a generator set according to claim 3, characterized in that: Four single-pole miniature circuit breakers are arranged on the live wire and the neutral wire of the main charger circuit and the standby charger.

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