CN202616871U - Zero second switching protection device of storage battery - Google Patents

Abstract

The utility model discloses a zero second switching protection device of a storage battery, comprising a power supply clamp, an overcurrent protection device, a contactor, a diode and a guide line, wherein the overcurrent protection device comprises a fuse wire and an air switch which are connected in parallel, a normally open contact of the contractor is connected with a discharge instrument, a normally closed contact of the contactor is connected with a charger, a common contact of the contactor is connected with the storage battery, and the diode is connected between a circuit on which the storage battery is positioned and a circuit on which the charger is positioned and is connected with the overcurrent protection device in parallel. Under the condition of power failure of a power frequency alternating current, the storage battery can timely supply power to a load, simultaneously, the charger and the discharge instrument stop working, the zero second switching is realized, and the normal work of the load can be protected from being affected. The zero second switching protection device of the storage battery avoids the influence on the load as the storage battery can not be switched for supplying power in the power failure of the power frequency alternating current in the prior art, has a simple structure and is strong in practicability.

Description

A battery zero-second switching protection device

technical field

The utility model relates to a protection device, in particular to a zero-second switching protection device for a storage battery.

Background technique

The modern electric power industry and the communication industry need the battery to provide backup power. The battery occupies an important position. It is an important job for the staff to maintain the battery and make it work in a good state. There are several ways to maintain the battery. The most common method is the offline discharge scheme. , unplug the battery fuse, do not charge the battery with the charger, the load is directly connected to the output of the charger, and the charger provides DC power, so connect the discharge instrument at both ends of the battery to discharge, if the power frequency AC power is suddenly interrupted at this time , the charger stops working, the battery cannot supply power to the load in time, and the DC load loses power, affecting the normal operation of the protection cabinet, which will have a great impact on the load and the circuit.

Utility model content

The purpose of this utility model is to provide a battery zero-second switching protection device, which enables the battery to supply power to the load in time when the power frequency AC power is cut off, and at the same time stops the charger and the discharge instrument to achieve zero-second switching and protect The normal operation of the load is not affected; the battery zero-second switching protection device overcomes the impact on the load caused by the inability to switch the battery power supply in time when the power frequency AC power is cut off in the traditional technology, thereby achieving the purpose of the utility model.

The technical problem solved by the utility model can be realized by adopting the following technical solutions:

A battery zero-second switching protection device, characterized in that it includes:

A contactor for detecting power frequency alternating current, the contactor has a normally open contact, a normally closed contact and a common contact;

A first connection mechanism for connecting the positive pole of the charger, the first connection mechanism is connected to the normally closed contact of the contactor through a first wire;

A second connection mechanism for connecting the positive pole of the storage battery, the second connection mechanism is connected to the common contact of the contactor through a second wire;

A third connection mechanism for connecting the positive pole of the discharge instrument, the second connection mechanism is connected to the normally open contact of the contactor through a third wire;

A diode, the anode of the diode is connected to the first wire, and the cathode is connected to the second wire.

In a preferred embodiment of the present invention, an overcurrent protector is connected in series with the second wire.

In a preferred embodiment of the present invention, a normally open air switch is connected between the first wire and the second wire.

In a preferred embodiment of the present utility model, the first connection mechanism, the second connection mechanism and the third connection mechanism are all power clips.

The beneficial effect of the utility model is that: in the case of a power frequency AC power failure, the storage battery can supply power to the load in time, and at the same time stop the charger and the discharge instrument, realize zero-second switching, and protect the normal operation of the load from being affected; the structure is simple , Strong practicability.

Description of drawings

Fig. 1 is a schematic diagram of a traditional off-line discharge device.

Fig. 2 is a schematic diagram of the battery zero-second switching protection device described in the present invention.

Fig. 3 is an implementation principle diagram of the battery zero-second switching protection device described in the utility model.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments. Referring to Fig. 2, Fig. 2 is a schematic diagram of a traditional offline discharge device. The traditional discharge method is to unplug the fuses 10a and 10b of the battery 10, so that the battery 10 is in an offline state, and the charger 9 supplies power to the load 12. The charger 9 cannot To charge the battery 10, the discharge instrument 11 is connected to the battery 10 to discharge. The disadvantage is that the battery 10 cannot supply power to the load 12 in time when the mains power is interrupted, and the load 12 is powered off, which affects the normal operation of the protection cabinet.

As shown in Figure 2 and Figure 3, the battery zero-second switching protection device described in the utility model includes three connection mechanisms, and the three connection mechanisms are divided into power clips 6, 7, 8, a contactor 5, and a diode 2 , a normally open air switch 3, and an overcurrent protection device 4. Contactor 5 detects power frequency alternating current.

The power clip 6 is connected to the positive pole of the charger 9 on the one hand, and connected to the normally closed contact 5b of the contactor 5 through the wire 1 on the other hand. The power clip 7 is connected to the positive pole of the battery 10 on the one hand, and connected to the common contact 5c of the contactor 5 through the wire 1a on the other hand, and an overcurrent protection device 4 is connected in series on the wire 1a. The power clip 8 is connected to the positive pole of the discharge device 11 on the one hand, and connected to the normally open contact 5a of the contactor 5 through the wire 1b on the other hand.

The anode of the diode 2 is connected to the wire 1, and the cathode is connected to the conductor 1a. The normally open air switch 3 is connected with the wires 1 and 1a.

When there is mains electricity, the contactor 5 operates, the common contact 5c of the contactor 5 and the normally open contact 5a are closed, and the positive line of the battery 10 passes through the power clamp 7, the wire 1a, the overcurrent protection device 4, and the contactor 5 The common contact 5c, the normally open contact 5a, the wire 1b, the power supply clamp 8 are connected to the positive line of the discharge instrument 11, the discharge instrument 11 is normally discharged, and the current flow is from the positive pole of the battery 10 to the power supply clamp 7, the wire 1a, the overcurrent The protection device 4, the common contact 5c of the contactor 5, the normally open contact 5a, the wire 1b, the power clip 8 to the positive pole of the discharge instrument 11, and then from the negative pole of the discharge instrument 11 to the negative pole of the storage battery 10. When the contactor 5 is closed, unplug the fuse 10a between the positive line of the battery 11 and the positive output (red line) of the charger 8, and the diode 2 will be cut off due to the reverse bias voltage, and the charger 9 cannot charge the battery 10. The device 9 supplies power to the load 12, and the current flow direction is: by the positive pole of the charger 9, to the positive pole of the load 12, to the negative pole of the load 12, and then to the negative pole of the charger 9.

The overcurrent protection device 4 is used for overcurrent protection, and the normally open air switch 3 is for manual charging, and the standby switch is usually disconnected, and is used in special cases or when expanding functions.

When the commercial power is suddenly interrupted during the discharge process, the contactor 5 is released, the common contact 5c of the contactor 5 is disconnected from the normally open contact 5a, and is closed with the normally closed contact 5b, and the discharge instrument 11 and the storage battery 10 are established. The connection is disconnected, and the discharge apparatus 11 stops working. The positive line of the storage battery 10 is connected with the positive line of the charger 9 through the power clip 7, the lead 1a, the overcurrent protection device 4, the common contact 5c of the contactor 5, the normally closed contact 5b, the lead 1, the power clip 6, At the same time, the positive pole of the load 12 is connected, and the storage battery 10 supplies power to the load 12 to ensure that the load 12 is not powered on. The diode 2 is switched in zero seconds when the output voltage of the charger 9 is lower than the voltage of the storage battery 10 when the switch of the contactor 5 has not been completed. Double insurance, the battery current is from the positive pole of the battery 10 to the positive pole of the charger 9 through the power clip 7, the wire 1a, the overcurrent protection device 4, the common contact 5c of the contactor 5, the normally closed contact 5b, the wire 1, and the power clip 6 line and the positive pole of the load 12, and then the negative pole of the load 12 returns to the negative pole of the battery 10 through the fuse 10b of the storage battery 10.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (4)

1. A battery zero-second switching protection device, characterized in that it comprises: A contactor for detecting power frequency alternating current, the contactor has a normally open contact, a normally closed contact and a common contact; A first connection mechanism for connecting the positive pole of the charger, the first connection mechanism is connected to the normally closed contact of the contactor through a first wire; A second connection mechanism for connecting the positive pole of the storage battery, the second connection mechanism is connected to the common contact of the contactor through a second wire; A third connection mechanism for connecting the positive pole of the discharge instrument, the second connection mechanism is connected to the normally open contact of the contactor through a third wire; A diode, the anode of the diode is connected to the first wire, and the cathode is connected to the second wire. 2. The battery zero-second switching protection device according to claim 1, characterized in that an overcurrent protector is connected in series on the second wire. 3. The battery zero-second switching protection device according to claim 1, wherein a normally open air switch is connected between the first wire and the second wire. 4. The battery zero-second switching protection device according to claim 1, characterized in that, the first connection mechanism, the second connection mechanism, and the third connection mechanism are all power clips.

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