CN107508338A - A kind of charging device with break-make protection - Google Patents

Abstract

The invention discloses a charging device with on-off protection, which includes a charger and a battery pack. The charger is provided with an internal circuit of the charger, an input circuit and an electromagnetic relay. The internal circuit of the charger is connected with at least two charger connectors. , the electromagnetic relay includes a moving contact, a static contact and a coil, the moving contact and the static contact are respectively connected to the internal circuit of the charger and the input circuit, the coil is connected to two first protection connectors, and the battery pack is provided with a battery pack In the internal circuit, the internal circuit of the battery pack is connected with the battery pack joint connected with the charger joint to form a charging circuit and the second protection joint connected with the first protection joint to form a protection circuit, and a switch is connected in series on the protection circuit. And the electromagnetic relay forms an on-off protection for the charger, preventing the situation that the battery pack is not installed on the charger and the connector of the charger exposed to the air is charged, eliminating the potential safety hazard of the charger.

Description

A charging device with on-off protection

technical field

The invention belongs to the field of chargers, in particular to a charging device with on-off protection.

Background technique

At present, when the external charger commonly used on the market is used to charge the battery, the connectors of the socket are charged. If the charger is connected to the power supply, even if the battery is not charged, the exposed connectors are still charged, which is prone to electric shock. In order to eliminate this safety hazard, the common protection method on the market is to control the on-off of the charging circuit through an additional switch, but the simple switch control is easy to be activated by mistake, and still has certain safety hazards.

Contents of the invention

The technical problem to be solved by the present invention is to provide a high-safety charging device with on-off protection.

In order to solve the above technical problems, the present invention adopts the following technical solutions: a charging device with on-off protection, including a charger and a battery pack, the charger is provided with an internal circuit of the charger for charging the battery pack, an internal circuit for the charger The input circuit for power supply and the electromagnetic relay connected in series with the internal circuit of the charger and the input circuit. There are at least two charger connectors connected to the internal circuit of the charger. The electromagnetic relay includes a moving contact, a static contact and a coil, and a moving contact and a static contact. The contacts are respectively connected to the internal circuit of the charger and the input circuit. The coil is connected with two first protection connectors. The internal circuit of the battery pack is arranged in the battery pack. The battery pack connector and the second protection connector are connected with the first protection connector to form a protection circuit, and a switch is connected in series on the protection circuit.

Further, the charger is provided with a first board, the charger connector and the first protection connector are both arranged on the first board, the battery pack is provided with a second board, the battery pack connector and the second protection connector are both provided on the second board.

Further, several grooves are provided on the second board facing the first board, and the battery pack connector and the second protection connector are both arranged in the grooves.

Further, the switch is a non-contact switch.

Further, the non-contact switch is arranged on the first board and the second board.

Further, the non-contact switch is a magnetic switch, and the magnetic switch includes a magnet and a magnetic induction contact, and the magnet and the magnetic induction contact are respectively arranged on the battery pack and the charger.

Further, the non-contact switch is a photoelectric induction switch, and the photoelectric induction switch includes a transmitting end and a receiving end, and the transmitting end and the receiving end are respectively arranged on the battery pack and the charger.

Further, the charger connector, the first protection connector, the battery pack connector and the second protection connector are all square conductive metal sheets.

Further, chamfers are provided on the conductive metal sheet.

Compared with prior art, the beneficial effect of the present invention is:

1. When the input circuit is connected, when the battery pack is installed on the charger, the first protection connector is inserted into the groove to connect with the second protection connector and the switch is turned on, so that the protection circuit is connected, and the coil in the electromagnetic relay has When the current passes, the electromagnet generates magnetic force, so that the moving contact of the electromagnetic relay is attracted to the static contact under the action of the magnetic force, and the input circuit is connected with the internal circuit of the charger, that is, the input circuit supplies power to the internal circuit of the charger, so that the internal circuit of the charger The circuit is not charged; at the same time, the charger connector is inserted into the groove and connected with the battery connector to form a charging circuit, so that the charger charges the battery pack. When the input circuit is turned on and the battery pack is removed from the charger, the switch is turned off, and the first protection connector and the second protection connector are not connected, and the protection circuit is in the disconnected state, so that the coil in the electromagnetic relay There is no current passing through the electromagnet, and the electromagnet has no magnetic force, that is, the moving contact and the static contact of the electromagnetic relay are in a disconnected state, so that the input circuit cannot be connected with the internal circuit of the charger, that is, the input circuit cannot supply power to the internal circuit of the charger, so charging The internal circuit of the charger is not charged, that is, the charger connector connected to the internal circuit of the charger is not charged, which prevents the charging of the connector exposed to the air when the battery is not installed, and eliminates the potential safety hazard of the charger.

2. By concentrating the charger connector and the first protection connector on the first board, and the battery pack connector and the second protection connector on the second board, it is more convenient to connect the charger and the battery pack. At the same time, the processing difficulty of the charger and the battery pack is reduced, and the production cost is saved.

3. When the charger and the battery pack are plugged in, the first plug-in board is against the second plug-in board, and the first protection joint and the charger joint are completely located in the groove, so that when charging, the charger joint, the first protection joint , the battery pack connector and the second protection connector are located in the groove to prevent the live parts from being exposed to cause electric shock and improve the safety performance of the charger.

4. The on-off switch on the protection circuit adopts a non-contact switch, which can ensure the integrity of the charger and battery pack shell and improve safety.

5. When the first plug board on the charger is docked with the second plug board on the battery pack, that is, when the first protection connector and the charger connector are completely in the groove, the non-contact switch will be turned on to prevent During the plugging process, the non-contact switch has been turned on so that the first protection connector exposed to the air and the charger connector are charged, thereby improving the use safety of the charging device.

6. The magnetic control switch has the advantages of stable performance, good reliability, and durability, and the structure of the magnetic control switch is simple, and the production cost is low, which greatly reduces the production cost.

7. The photoelectric sensor switch is not easily disturbed by various heat sources, light sources, radio frequency radiation and hot air flow, and has more stable operation and high sensitivity. It can be used in various environments, especially in magnetic field environments, and has a wide range of applications.

8. The micro switch has a simple structure and low price. It is installed on the charger and activated by pressing the battery pack, which is more suitable for low-cost use.

9. The first protection connector is the same connector as the charger connector, and the second protection connector is the same connector as the battery pack connector, which can greatly reduce the number of connectors and reduce production costs.

10. The square conductive metal sheet is easy to process and install, and the contact area of the metal sheet is large, which makes the connection effect between the charger connector and the battery pack connector and the first protective connector and the second protective connector better, preventing disconnection, and at the same time The processing cost of the metal sheet is low, which reduces the production cost, and chamfering is provided on the conductive metal sheet to prevent the sharp edges and corners of the conductive metal sheet from scratching the user and ensure the safety of the charger.

Compared with the prior art, the present invention forms an on-off protection for the charger through the protection circuit and the electromagnetic relay, preventing the battery pack from being falsely started when the battery pack is not installed on the charger, so that the charger exposed to the air is charged. , eliminating the potential safety hazard of the charger.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is a schematic diagram of an uncharged state of a charging device with on-off protection according to the present invention;

Fig. 2 is a schematic diagram of the charging state of a charging device with on-off protection according to the present invention;

FIG. 3 is a schematic circuit diagram of a charging device with on-off protection according to the present invention.

Among them: 1. Charger; 11. Internal circuit of charger; 12. Input circuit; 13. Electromagnetic relay; 131. Moving contact; 132. Static contact; 14. First board; 141. Non-contact switch; 2. The battery pack; 21. The internal circuit of the battery pack; 22. The second board; 221. The groove.

detailed description

An embodiment of a charging device with on-off protection according to the present invention will be further described with reference to FIG. 1 to FIG. 3 .

Embodiment one:

A charging device with on-off protection, comprising a charger 1 and a battery pack 2, the charger 1 is provided with a charger internal circuit 11 for charging the battery pack 2, an input circuit 12 for supplying power to the charger internal circuit 11, and The charger internal circuit 11 and the electromagnetic relay 13 connected in series with the input circuit 12, the charger internal circuit 11 is connected with at least two charger 1 connectors, the electromagnetic relay 13 includes a moving contact 131, a static contact 132, an electromagnet and a coil, The movable contact 131 and the static contact 132 are respectively connected with the internal circuit 11 of the charger and the input circuit 12. The coil is connected with two first protection connectors. The internal circuit 21 of the battery pack is arranged in the battery pack 2, and the internal circuit 21 of the battery pack The battery pack 2 connector connected with the charger 1 connector to form a charging circuit and the second protection connector connected with the first protection connector to form a protection circuit are connected to the top. A non-contact switch 141 is connected in series on the protection circuit, and the non-contact switch 141 prevents The charger 1 and the battery pack 2 are affected by the adhesion, corrosion and wear between the two, and the operation is more stable. The charger 1 is provided with a first plug board 14, and the charger 1 connector and the first protection connector are both Set on the first board 14, the battery pack 2 is provided with the second board 22, the second board 22 is provided with several grooves 221 facing the first board 14, the connector of the battery pack 2 and the second protection The joints are all arranged in the groove 221, the non-contact switch 141 is a magnetic switch, the magnetic switch includes a magnet and a magnetic induction contact, and the magnet and the magnetic induction contact are respectively arranged on the first board 14 and the second board 22, The magnetic control switch has the advantages of stable performance, good reliability, and durability, and the structure of the magnetic control switch is simple, the production cost is low, and the production cost is greatly reduced; the charger 1 connector, the first protection connector, the battery pack 2 connector and the second protection The joints are all square conductive metal sheets, and chamfers are arranged on the conductive metal sheets. The square conductive metal sheet is easy to process and install, and the contact area of the metal sheet is large, which makes the connection between the charger 1 connector and the battery pack 2 connector and the first protective connector and the second protective connector better, preventing disconnection, and at the same time The processing cost of the metal sheet is low, which reduces the production cost, and chamfering is provided on the conductive metal sheet to prevent the sharp edges and corners of the conductive metal sheet from scratching the user and ensure the safe use of the charger 1 .

When the input circuit 12 is turned on, when the battery pack 2 is installed on the charger 1, the first protection connector is inserted into the groove 221 and connected to the second protection connector and the magnet on the battery is close to the magnetic induction contact, and the magnetic induction contact The small iron plate drives the magnetic induction contact to close, so that the protection circuit is connected, and the coil in the electromagnetic relay 13 has a current to pass through, and the electromagnet generates magnetic force, so that the movable contact 131 of the electromagnetic relay 13 contacts the static contact 132 under the action of the magnetic force. Pull in, the input circuit 12 communicates with the internal circuit 11 of the charger, that is, the input circuit 12 supplies power to the internal circuit 11 of the charger, so that the internal circuit 11 of the charger is not charged; at the same time, the connector of the charger 1 is inserted into the groove 221 to neutralize the battery The connectors are connected to form a charging circuit, so that the charger 1 charges the battery pack 2 .

When the input circuit 12 is in the on state and the battery pack 2 is removed from the charger 1, the magnet is far away from the magnetic induction contact, and the small iron plate in the magnetic induction contact drives the magnetic induction contact to disconnect, and at the same time the first protection connector It is not connected to the second protection joint, and the protection circuit is in a disconnected state, so that there is no current passing through the coil in the electromagnetic relay 13, and the electromagnet has no magnetic force, that is, the movable contact 131 and the static contact 132 of the electromagnetic relay 13 are in a disconnected state , so that the input circuit 12 cannot communicate with the internal circuit 11 of the charger, that is, the input circuit 12 cannot supply power to the internal circuit 11 of the charger, so the internal circuit 11 of the charger is not charged, that is, the connector of the charger 1 connected to the internal circuit 11 of the charger is not Charged to prevent the charging of the joint of the charger 1 exposed to the air due to false start when the battery is not installed, eliminating the potential safety hazard of the charger 1 .

By concentrating the connector of the charger 1 and the first protection connector on the first socket 14, the connectors of the battery pack 2 and the second protection connector are concentrated on the second socket 22, so that the charger 1 and the battery pack 2 are plugged together. It is more convenient to connect, and at the same time, the processing difficulty of the charger 1 and the battery pack 2 is reduced, and the production cost is saved; The protection connector and the charger 1 connector are completely located in the groove 221, so that when charging, the charger 1 connector, the first protection connector, the battery pack 2 connector and the second protection connector are all located in the groove 221, preventing the live parts from being exposed outside cause an electric shock and improve the safety performance of the charger 1; when the first protection connector and the charger 1 connector are completely located in the groove 221, the non-contact switch 141 will be turned on, preventing the non-contact switch 141 from being connected during the plugging process. Having been switched on, the first protection connector exposed to the air and the connector of the charger 1 are electrified, thereby improving the use safety of the charging device.

Embodiment two:

The non-contact switch 141 is used as a photoelectric sensor switch, and the photoelectric sensor switch includes a transmitting end and a receiving end, and the technical characteristics that the transmitting end and the receiving end are respectively arranged on the battery pack 2 and the charger 1 replace the non-contact switch in the first embodiment 141 is a magnetic control switch, the magnetic control switch includes a magnet and a magnetic induction contact, and the magnet and the magnetic induction contact are respectively arranged on the battery pack 2 and the charger 1, and other technical features are the same as those in the first embodiment.

The photoelectric sensor switch is not easily disturbed by various heat sources, light sources, radio frequency radiation and hot air flow, and has more stable operation and high sensitivity. It can be used in various environments, especially in magnetic field environments, and has a wide range of applications.

Embodiment three:

The difference between this embodiment and the first embodiment is that a micro switch is connected in series on the protection circuit, and the micro switch is installed on the charger 1 and activated by pressing the battery pack 2 .

The micro switch has a simple structure and low price, and is more suitable for low-cost use.

The above descriptions are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention should also be regarded as the protection scope of the present invention.

Claims (10)

1. a kind of charging device with break-make protection, including charger and battery bag, it is characterised in that：Set in the charger Have to the charger internal circuit of battery bag charging, input circuit and and charger internal to the power supply of charger internal circuit Circuit and the electromagnetic relay of input circuit series connection, are connected with least two charger contacts on the charger internal circuit, The electromagnetic relay includes movable contact, stationary contact and coil, movable contact and stationary contact respectively with the charger internal circuit Connected with input circuit, two first protection joints are connected with the coil, are provided with the battery bag inside battery bag Circuit, be connected with battery bag internal circuit with charger contacts be linked to be charging circuit battery bag joint and with the first protection Joint is linked to be the second protection joint of protection circuit, and switch is in series with the protection circuit.

A kind of 2. charging device with break-make protection according to claim 1, it is characterised in that：Set on the charger There is the first plate, the charger contacts and the first protection joint are arranged on the first plate, be provided with the battery bag Second plate, the battery bag joint and the second protection joint are arranged on the second plate.

3. according to a kind of charging device with break-make protection described in claim 2, it is characterised in that：Set on second plate There are several grooves towards the first plate, the battery bag joint and the second protection joint are arranged in groove.

4. according to a kind of charging device with break-make protection described in claim 1, it is characterised in that：The switch is contactless Switch.

A kind of 5. charging device with break-make protection according to claim 4, it is characterised in that：The non-contact switch It is arranged on the first plate and the second plate.

A kind of 6. charging device with break-make protection according to claim 4 or 5, it is characterised in that：It is described contactless Switch includes magnet and magnetic induction contact for magnetic switch, magnetic switch, and the magnet and magnetic induction contact are separately positioned on electricity On Chi Bao and charger.

A kind of 7. charging device with break-make protection according to claim 4 or 5, it is characterised in that：It is described contactless Switch includes transmitting terminal and receiving terminal for photoelectric sensor switch, photoelectric sensor switch, and the transmitting terminal and receiving terminal are set respectively In battery bag and charger.

A kind of 8. charging device with break-make protection according to claim 1, it is characterised in that：The switch is opened for fine motion Close.

A kind of 9. charging device with break-make protection according to claim 1, it is characterised in that：First protects joint and fills Electrical connector is same tip, and the second protection joint and battery bag joint are same tip.

A kind of 10. charging device with break-make protection according to claim 2, it is characterised in that：The charger contacts, First protection joint, battery bag joint and the second protection joint are square conductive metal sheet, are set on the conductive metal sheet It is equipped with chamfering.