CN211830311U - On-board charger for maintaining storage battery - Google Patents
On-board charger for maintaining storage battery Download PDFInfo
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- CN211830311U CN211830311U CN202020771097.7U CN202020771097U CN211830311U CN 211830311 U CN211830311 U CN 211830311U CN 202020771097 U CN202020771097 U CN 202020771097U CN 211830311 U CN211830311 U CN 211830311U
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Abstract
The utility model provides an on-vehicle charger for maintaining battery, a serial communication port, include: the device comprises a sealing ring, an AC input joint, an AC output joint, a sheath, an AC power line, a lower shell, a power line sealing ring, a DC positive electrode output line, a DC negative electrode output line, a locking screw, a power line fixing upper pressing block, a power line fixing lower pressing block, a circuit board, an upper shell, a light guide column, a DC +/-output interface and a light guide port; the circuit on the wiring board includes: the device comprises an input connecting end, a lightning protection circuit, an input filter circuit, a bridge rectifier circuit, a rectified filter circuit, a single-ended flyback primary side circuit, a transformer, an output rectifier circuit, an output filter circuit, a polarity reverse connection protection circuit, an output connecting end, a current sampling circuit, a primary side control circuit, a secondary side control circuit, a microcontroller and an optical coupler; a power management chip is arranged in the primary side control circuit; the utility model is used for maintain and maintain the battery.
Description
Technical Field
The utility model relates to a charger, especially an on-vehicle charger for maintaining battery.
Background
The storage battery on the automobile can cause that the automobile cannot be started in cold winter due to the reduction of the self-stored power of the storage battery; at the moment, the storage battery needs to be supplied with electricity in time; but because the automobile is not started, the generator on the automobile cannot be started;
almost all automobiles are rarely provided with a special charger to maintain, maintain and charge a storage battery; when the automobile is in static arrangement and is not started for a long time, the electric power in the storage battery is naturally lost, the service life of the storage battery is shortened if the storage battery is seriously insufficient, and the storage battery is scrapped if the storage battery is seriously insufficient.
Disclosure of Invention
To exist not enough among the prior art, the utility model provides an on-vehicle charger for maintaining battery can in time charge for the battery when the battery insufficient voltage to can maintain and maintain the battery, prolong its life-span. The utility model adopts the technical proposal that:
an on-board charger for maintaining a battery, comprising: the device comprises a sealing ring, an AC input joint, an AC output joint, a sheath, an AC power line, a lower shell, a power line sealing ring, a DC positive electrode output line, a DC negative electrode output line, a locking screw, a power line fixing upper pressing block, a power line fixing lower pressing block, a circuit board, an upper shell, a light guide column, a DC +/-output interface and a light guide port;
the AC input joint and the AC output joint are respectively connected with corresponding AC power lines; a sheath is sleeved at the joint of each AC power line and the AC input joint and the AC output joint;
the AC input joint and the AC output joint penetrate through corresponding mounting holes on the lower shell and are sleeved with corresponding power cord sealing rings to be mounted in corresponding mounting holes on the lower shell; the power line fixing upper pressing block and the power line fixing lower pressing block clamp the AC power line through locking screws and are fixed on the lower shell through the locking screws; the AC power line connected with the AC input joint and the AC power line connected with the AC output joint are both connected to the input connecting end at one end of the circuit board to complete the switching of the AC power lines;
the DC +/-output interface is arranged on the lower shell and is respectively connected with one end of the DC positive output line and one end of the DC negative output line, and the other end of the DC positive output line and the other end of the DC negative output line are connected with the output connecting end on the circuit board;
the light guide column is arranged at the rear end of the upper shell, and one end of the light guide column is aligned with the light guide port on the rear end of the upper shell; the mounting bracket is mounted on the side surface or the lower surface of the upper shell;
the circuit board is arranged in the upper shell, and the light-emitting indicator lamp on the circuit board is aligned to the light guide column; the lower shell is welded at the front end of the upper shell;
and sealing rings are also arranged at the front ends of the AC input joint and the AC output joint.
Furthermore, a label is also arranged on the upper surface of the upper shell.
Further, a mounting bracket is arranged on the lower surface of the upper shell.
Further, the circuit on the wiring board includes: the device comprises an input connecting end, a lightning protection circuit, an input filter circuit, a bridge rectifier circuit, a rectified filter circuit, a single-ended flyback primary side circuit, a transformer, an output rectifier circuit, an output filter circuit, a polarity reverse connection protection circuit, an output connecting end, a current sampling circuit, a primary side control circuit, a secondary side control circuit, a microcontroller and an optical coupler; a power management chip is arranged in the primary side control circuit;
the input connecting end is connected with one end of the lightning protection circuit, the other end of the lightning protection circuit is connected with one end of the input filter circuit, the other end of the input filter circuit is connected with the input end of the bridge rectifier circuit, the input end of the bridge rectifier circuit is connected with one end of the rectified filter circuit, the other end of the rectified filter circuit is connected with the single-ended flyback primary side circuit, and the single-ended flyback primary side circuit is connected with the primary side of the transformer; the primary side of the transformer is connected with the primary side control circuit;
the secondary side of the transformer is connected with one end of an output rectifying circuit, the other end of the output rectifying circuit is connected with one end of an output filter circuit, the other end of the output filter circuit is connected with one end of a polarity reversal connection protection circuit, and the other end of the polarity reversal connection protection circuit is connected with an output connection end; the current sampling circuit is respectively connected with the output filter circuit and the output connecting end;
the secondary side control circuit is connected with the output end of the current sampling circuit and is also connected with the microcontroller; the secondary side control circuit is connected with the primary side control circuit through an optical coupler;
the secondary side control circuit is internally provided with a comparator, one end of the comparator is connected with the output voltage of the current sampling circuit, the other end of the comparator is connected with a set voltage signal of the microcontroller, and the output of the comparator is fed back to the primary side control circuit through the optocoupler.
Further, the output rectifying circuit adopts a synchronous rectifying circuit.
The utility model has the advantages that:
1) the waterproof and dustproof grade reaches IP65, and the integral protective performance is good.
2) The continuous output current is large, and 8A current can be continuously output.
3) The polarity reverse connection protection circuit is arranged, so that the safety and the reliability are higher.
4) The output line has an AC output dedicated interface, and is used as another electric device.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic diagram of the front end of the present invention.
Fig. 3 is a schematic diagram of the rear end of the present invention.
Fig. 4 is an electrical block diagram of the present invention.
Detailed Description
The invention is further described with reference to the following specific drawings and examples.
The utility model provides an on-vehicle charger for maintaining battery, as shown in fig. 1-3, include: the device comprises a sealing ring 1, an AC input joint 2, an AC output joint 3, a sheath 4, an AC power line 5, a lower shell 6, a power line sealing ring 7, a DC positive electrode output line 8, a DC negative electrode output line 9, a locking screw 10, a power line fixing upper pressing block 11, a power line fixing lower pressing block 12, a circuit board 13, an upper shell 14, a label 15, a light guide column 16, a mounting bracket 17, a DC +/-output interface 18 and a light guide port 19;
the AC input joint 2 and the AC output joint 3 are respectively connected with corresponding AC power lines 5; a sheath 4 is sleeved at the joint of each AC power line 5 and the AC input joint 2 and the AC output joint 3;
the AC input joint 2 and the AC output joint 3 pass through corresponding mounting holes on the lower shell 6 and are sleeved with corresponding power cord sealing rings 7 to be mounted in corresponding mounting holes on the lower shell 6; the sealing function is realized; the power cord fixing upper pressing block 11 and the power cord fixing lower pressing block 12 clamp the AC power cord 5 through a locking screw 10 and are fixed on the lower shell 6 through the locking screw 10; the AC power line connected with the AC input joint 2 and the AC power line connected with the AC output joint 3 are both connected to the input connection end at one end of the circuit board 13 to complete the switching of the AC power lines; the 220v alternating current can be simultaneously input into the circuit board 13 and output from the AC output connector 3, so that the use of other equipment needing the 220v alternating current is facilitated;
a DC +/-output interface 18 is arranged on the lower shell 6 and is respectively connected with one end of a DC positive output line 8 and one end of a DC negative output line 9, and the other end of the DC positive output line 8 and the other end of the DC negative output line 9 are connected with an output connecting end on a circuit board 13;
the light guide column 16 is arranged at the rear end of the upper shell 14, and one end of the light guide column 16 is aligned with the light guide port 19 on the rear end of the upper shell 14; label 15 is mounted on the upper surface of upper shell 14; a mounting bracket 17 is mounted to a side or lower surface of the upper case 14; the on-board charger can be connected to the vehicle through the mounting bracket 17;
the circuit board 13 is arranged in the upper shell 14, and a light-emitting indicator lamp on the circuit board 13 is aligned with the light guide column 16; the lower shell 6 is welded at the front end of the upper shell 14;
the front ends of the AC input connector 2 and the AC output connector 3 are also provided with sealing rings 1, so that the AC input connector 2 and the AC output connector 3 can have waterproofness when being connected with corresponding AC sockets.
The circuitry on the wiring board 13, see fig. 4, includes: the device comprises an input connecting end, a lightning protection circuit, an input filter circuit, a bridge rectifier circuit, a rectified filter circuit, a single-ended flyback primary side circuit, a transformer, an output rectifier circuit, an output filter circuit, a polarity reverse connection protection circuit, an output connecting end, a current sampling circuit, a primary side control circuit, a secondary side control circuit, a microcontroller and an optical coupler; a power management chip is arranged in the primary side control circuit; wherein, the output rectifying circuit adopts a synchronous rectifying circuit;
the input connecting end is connected with one end of the lightning protection circuit, the other end of the lightning protection circuit is connected with one end of the input filter circuit, the other end of the input filter circuit is connected with the input end of the bridge rectifier circuit, the input end of the bridge rectifier circuit is connected with one end of the rectified filter circuit, the other end of the rectified filter circuit is connected with the single-ended flyback primary side circuit, and the single-ended flyback primary side circuit is connected with the primary side of the transformer; the primary side of the transformer is connected with the primary side control circuit;
the secondary side of the transformer is connected with one end of an output rectifying circuit, the other end of the output rectifying circuit is connected with one end of an output filter circuit, the other end of the output filter circuit is connected with one end of a polarity reversal connection protection circuit, and the other end of the polarity reversal connection protection circuit is connected with an output connection end; the current sampling circuit is respectively connected with the output filter circuit and the output connecting end;
the secondary side control circuit is connected with the output end of the current sampling circuit and is also connected with the microcontroller; the secondary side control circuit is connected with the primary side control circuit through an optical coupler;
the working principle mainly comprises: the input alternating current is rectified to be changed into pulsating direct current high voltage electricity, and then voltage stabilizing and filtering are carried out on the direct current high voltage electricity and the pulsating direct current high voltage electricity and the voltage stabilizing and filtering electricity are sent to a single-ended flyback primary side circuit and a transformer to carry out on-off voltage reduction; a power management chip in the primary side control circuit performs PWM switch on-off control; the secondary side voltage of the transformer is subjected to synchronous rectification and direct current filtering, current voltage controlled by the microcontroller is output, and then the current voltage is connected to a storage battery through an output connecting end and a DC output line for charging; the polarity reverse connection protection circuit can prevent the vehicle-mounted charger from being damaged when the positive electrode and the negative electrode of the storage battery are reversely connected;
the secondary side control circuit is internally provided with a comparator, one end of the comparator is connected with the output voltage of the current sampling circuit, the other end of the comparator is connected with a set voltage signal of the microcontroller, and the output of the comparator is fed back to the primary side control circuit through the optocoupler, so that the primary side control circuit correspondingly adjusts the duty ratio of PWM control according to the setting of the microcontroller to obtain the required output voltage and output current.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.
Claims (5)
1. An on-board charger for maintaining a battery, comprising: the device comprises a sealing ring (1), an AC input connector (2), an AC output connector (3), a sheath (4), an AC power line (5), a lower shell (6), a power line sealing ring (7), a DC positive electrode output line (8), a DC negative electrode output line (9), a locking screw (10), a power line fixing upper pressing block (11), a power line fixing lower pressing block (12), a circuit board (13), an upper shell (14), a light guide column (16), a mounting bracket (17), a DC +/-output interface (18) and a light guide port (19);
the AC input joint (2) and the AC output joint (3) are respectively connected with corresponding AC power lines (5); a sheath (4) is sleeved at the joint of each AC power line (5) and the AC input joint (2) and the AC output joint (3);
the AC input joint (2) and the AC output joint (3) penetrate through corresponding mounting holes on the lower shell (6) and are sleeved with corresponding power cord sealing rings (7) to be mounted in corresponding mounting holes on the lower shell (6); the power line fixing upper pressing block (11) and the power line fixing lower pressing block (12) clamp the AC power line (5) through a locking screw (10) and are fixed on the lower shell (6) through the locking screw (10); the AC power line connected with the AC input joint (2) and the AC power line connected with the AC output joint (3) are both connected to the input connection end at one end of the circuit board (13) to complete the switching of the AC power lines;
a DC +/-output interface (18) is arranged on the lower shell (6) and is respectively connected with one end of a DC positive output line (8) and one end of a DC negative output line (9), and the other ends of the DC positive output line (8) and the DC negative output line (9) are connected with an output connecting end on a circuit board (13);
the light guide column (16) is arranged at the rear end of the upper shell (14), and one end of the light guide column (16) is aligned with a light guide opening (19) on the rear end of the upper shell (14);
the circuit board (13) is arranged in the upper shell (14), and the light-emitting indicator lamp on the circuit board (13) is aligned to the light guide column (16); the lower shell (6) is welded at the front end of the upper shell (14);
the front ends of the AC input joint (2) and the AC output joint (3) are also provided with sealing rings (1).
2. The on-board charger for maintaining a battery as defined in claim 1,
and a label (15) is also arranged on the upper surface of the upper shell (14).
3. The on-board charger for maintaining a battery as defined in claim 1,
the lower surface of the upper shell (14) is provided with a mounting bracket (17).
4. The on-board charger for maintaining a battery as defined in claim 1,
the circuit on the wiring board (13) comprises: the device comprises an input connecting end, a lightning protection circuit, an input filter circuit, a bridge rectifier circuit, a rectified filter circuit, a single-ended flyback primary side circuit, a transformer, an output rectifier circuit, an output filter circuit, a polarity reverse connection protection circuit, an output connecting end, a current sampling circuit, a primary side control circuit, a secondary side control circuit, a microcontroller and an optical coupler; a power management chip is arranged in the primary side control circuit;
the input connecting end is connected with one end of the lightning protection circuit, the other end of the lightning protection circuit is connected with one end of the input filter circuit, the other end of the input filter circuit is connected with the input end of the bridge rectifier circuit, the input end of the bridge rectifier circuit is connected with one end of the rectified filter circuit, the other end of the rectified filter circuit is connected with the single-ended flyback primary side circuit, and the single-ended flyback primary side circuit is connected with the primary side of the transformer; the primary side of the transformer is connected with the primary side control circuit;
the secondary side of the transformer is connected with one end of an output rectifying circuit, the other end of the output rectifying circuit is connected with one end of an output filter circuit, the other end of the output filter circuit is connected with one end of a polarity reversal connection protection circuit, and the other end of the polarity reversal connection protection circuit is connected with an output connection end; the current sampling circuit is respectively connected with the output filter circuit and the output connecting end;
the secondary side control circuit is connected with the output end of the current sampling circuit and is also connected with the microcontroller; the secondary side control circuit is connected with the primary side control circuit through an optical coupler;
the secondary side control circuit is internally provided with a comparator, one end of the comparator is connected with the output voltage of the current sampling circuit, the other end of the comparator is connected with a set voltage signal of the microcontroller, and the output of the comparator is fed back to the primary side control circuit through the optocoupler.
5. The vehicle charger of claim 4,
the output rectifying circuit adopts a synchronous rectifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020771097.7U CN211830311U (en) | 2020-05-11 | 2020-05-11 | On-board charger for maintaining storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020771097.7U CN211830311U (en) | 2020-05-11 | 2020-05-11 | On-board charger for maintaining storage battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211830311U true CN211830311U (en) | 2020-10-30 |
Family
ID=73020856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020771097.7U Active CN211830311U (en) | 2020-05-11 | 2020-05-11 | On-board charger for maintaining storage battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211830311U (en) |
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2020
- 2020-05-11 CN CN202020771097.7U patent/CN211830311U/en active Active
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