CN114498571B - Power battery charger fault protection device and use method - Google Patents
Power battery charger fault protection device and use method Download PDFInfo
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- CN114498571B CN114498571B CN202210396287.9A CN202210396287A CN114498571B CN 114498571 B CN114498571 B CN 114498571B CN 202210396287 A CN202210396287 A CN 202210396287A CN 114498571 B CN114498571 B CN 114498571B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/02—Arrangements of circuit components or wiring on supporting structure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
- Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a using method of a power battery charger fault protection device, wherein L, ground and N of a power battery charger plug connected with a power battery are connected with L, ground and N of a charging socket for charging; when the voltage between the L-OUT output end and the N-OUT output end is abnormally high and exceeds the threshold value of the piezoresistor VD1, the piezoresistor VD1 is fused and conducted, at the moment, a short circuit is formed between the L-OUT output end and the N-OUT output end of an external power grid through the fuse tube F2 and the piezoresistor VD1, and meanwhile, a short circuit is formed between the L and N internal power grids through the fuse tube F1 and the piezoresistor VD1, so that the current flowing through the fuse tube F1 and the fuse tube F2 is increased, and when the current flowing through the fuse tube F1 and the fuse tube F2 exceeds the fusing current, the fuse tube F1 and the fuse tube F2 are fused and are in an open circuit state, so that the internal power grid and the external power grid are disconnected, the effect of protecting the internal power grid is achieved, and the electricity utilization safety is enhanced.
Description
Technical Field
The invention relates to the field of power battery chargers for electric bicycles and electric tricycles, in particular to a fault protection device of a power battery charger and a using method of the fault protection device.
Background
Electric vehicles such as electric bicycles and electric tricycles are widely used in our daily life, and even electric vehicles are more and more common. Such electric vehicles commonly employ a power battery as an energy storage device. When a user inserts a charger connected with a power battery into a charging socket for charging, due to the fact that the charger fails (for example, the charger connected with the power battery reversely outputs high voltage to the L, N end of the charging socket) or the isolation effect is reduced, the power battery can reversely output high voltage higher than the upper limit of commercial power to the charging socket through the charger, so that the voltage of an internal power grid connected with the charging socket is increased suddenly, and other electric appliances on the internal power grid are damaged. For example, in a vehicle charged by a centralized special electric vehicle charging shed, a failed power battery charger may cause the charger to reversely output high voltage to a charging socket, if the charging socket of the charging shed does not have a high-voltage protection device, the voltage of an internal power grid connected with the charging socket will suddenly rise, so that a lighting lamp connected with the internal power grid in use is burnt out, and more seriously, power battery chargers of other electric vehicles connected with the internal power grid may be damaged to form a chain reaction, and a large number of power batteries work under abnormal conditions, so that safety risks are generated; for example, in rural areas or remote areas, there is no condition for a vehicle charged in a centralized special electric vehicle charging shed, a power battery charger is directly plugged into an internal power grid of a user, and when the charger outputs high voltage abnormally, lighting lamps and household appliances of the user in use may be damaged, which causes great loss to the user.
The existing invention or the utility model patent, such as "power battery safety basic device battery protector" (application number 202111372521.6), has the function of protecting the hidden danger of power battery fire; such as a battery charging protection circuit (application No. 202120809945.3), a battery charging protection circuit (202021944427.4), a lithium battery charging protection circuit (application No. 202120444063.1), a lithium battery charging protection circuit (application No. 202010586543.1), a lithium battery charging protection circuit and a lithium battery (202011585231.5), and the functions of the battery charging protection circuit and the lithium battery charging protection circuit are that the battery charging protection circuit protects the battery from over-temperature, over-voltage, over-current, over-charge, over-discharge and the like. The above patent, its function protection object is rechargeable battery, what solve is rechargeable battery's security problem itself, does not solve the security problem that can bring for the internal electric wire netting because of the trouble of charger.
Disclosure of Invention
In view of the prior art that the battery charging protection circuit has the functions of performing over-temperature, over-voltage, over-current, over-charging and over-discharging protection on a battery in charging, wherein the functional protection objects are all the rechargeable batteries, the problem of safety of the rechargeable batteries is solved, and the problem of safety brought to an internal power grid due to the fault of a charger is not solved; the fault protection device of the power battery charger is connected between a charging socket of the power battery charger and an internal power grid in series, so that the aims of isolating the faulty charger and protecting the internal power grid can be fulfilled.
The technical scheme adopted by the invention is as follows: a power battery charger fault protection device comprises a charging protection circuit arranged in a circuit shell, wherein the charging protection circuit is composed of a capacitor CY1, a capacitor CY2, a capacitor CY3, a protective tube F1, a protective tube F2, a piezoresistor VD1 and a mains supply interface TB1, and the capacitors are welded on a mainboard;
the capacitor CY1 and the capacitor CY2 are connected in series, one end of the capacitor CY1 is connected with one end of a fuse tube F1 and an input end L of a mains supply interface TB1 respectively, the other end of the fuse tube F1 is connected with one end of a piezoresistor VD1 and one end of a fuse tube F2 respectively, and the other end of the fuse tube F2 is connected with one end of a capacitor CY3 and serves as an output end L-OUT;
one end of the capacitor CY2 is connected with the input end N of the mains supply interface TB1 and the other end of the piezoresistor VD1 respectively and serves as an output end N-OUT;
the series end of the capacitor CY1 and the series end of the capacitor CY2 are respectively connected with the input ground of the mains supply interface TB1 and the other end of the capacitor CY3 and serve as an output end GND;
fusing current parameters of the fuse tube F1 and the fuse tube F2 are designed and selected according to the normal peak charging current of the power battery charger;
the threshold voltage parameter of the voltage dependent resistor VD1 is designed and selected according to the commercial power voltage + 10%.
The circuit shell consists of a shell body and a shell cover;
the main board is arranged in the shell, a mains supply interface TB1 on one side of the upper face of the main board is exposed in a concave area of the shell, an L-OUT lead, a GND lead and an N-OUT lead are arranged on the other side of the upper face of the main board, one ends of the L-OUT lead, the GND lead and the N-OUT lead respectively penetrate through the main board and are connected with L-OUT, GND and N-OUT output ends of the charging protection circuit, the other ends of the L-OUT lead, the GND lead and the N-OUT lead respectively penetrate through three lead holes of the shell and extend OUT of the shell, and the shell is fixed with the shell cover.
The shell is composed of a front concave wall, a U-shaped bottom surface, two front walls, two side walls and a rear wall which are of an integral structure, a concave area is arranged on the outer side of the front concave wall, a positioning plate and two clamping grooves are symmetrically arranged on the two side walls in the shell respectively, the height of the front concave wall is lower than that of the two front walls, the height of the two side walls and the height of the rear wall are the same as that of the two positioning plates, and three lead holes are formed in the rear wall.
The shell cover is rectangular, and two protruding buckles are symmetrically arranged on two side edges of the shell cover at intervals.
A method for using a power battery charger fault protection device comprises the following steps:
the method comprises the following steps of taking L, ground and N of a mains supply interface TB1 of a power battery charger fault protection device as an 'internal power grid';
the three leads of L-OUT, GND and N-OUT of the fault protection device of the power battery charger are respectively connected with L, ground and N of a charging socket to be used as an 'external power grid';
connecting L, ground and N of a power battery charger plug connected with a power battery with L, ground and N of a charging socket for charging;
when the power battery charger fails, abnormal high voltage is conducted to L-OUT and N-OUT ends of a fault protection device of the power battery charger, voltage between the L-OUT and N-OUT output ends is abnormally high, when the voltage exceeds a threshold value of a piezoresistor VD1, a piezoresistor VD1 is fused and conducted, at the moment, a short circuit is formed between the L-OUT and N-OUT output ends of an external power grid through a fuse tube F2 and a piezoresistor VD1, meanwhile, a short circuit is formed between the internal power grid L and N through a fuse tube F1 and a piezoresistor VD1, current flowing through the fuse tube F1 and a fuse tube F2 is increased, and when the current flowing through the fuse tube F1 and a fuse tube F2 exceeds fusing current, the fuse tube F1 and the fuse tube F2 are fused and are in an open circuit state, so that the internal power grid and the external power grid are disconnected.
The invention has the beneficial effects that:
the power battery charger fault protection device is connected into a socket used for charging a power battery of an electric bicycle, and forms the connection of an external power grid of a charging protection device, the charging protection device and an internal power grid of the charging protection device, and is used for protecting the internal power grid charged by the power battery from being attacked by high voltage output by an abnormal charger, playing a role of protecting the internal power grid of the charging device and preventing other electric appliances on the internal power grid from being damaged; meanwhile, the power battery charger with an aggressive fault on the internal power grid is also screened out and needs to be maintained or replaced by a user; the power battery charger fault protection device which has already performed the protection function can not be used repeatedly, and needs to be detached from the charging socket for replacement. The power battery charger fault protection device has the function of protecting against charger faults, and the protection object is an internal power grid connected with a charger, which is the most obvious difference from the prior art.
The power battery charger fault protection device is simple in structure, reliable in performance, low in cost and convenient to install, is suitable for being used in a centralized charging shed, and can also be installed in a user home in rural areas and other areas without the centralized charging shed.
The power battery charger fault protection device can be fixed in a charging socket in the prior art to form the charging socket with the power battery charger fault protection device, and is more convenient to carry and use; or fix the mainboard in prior art's charging socket, save casing and cap, only need very little fund input can realize keeping apart the effect of unusual charger, protection inside electric wire netting, reinforcing power consumption security.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an exploded view of the overall structure of the present invention;
FIG. 3 is a schematic structural view of the housing of the present invention;
FIG. 4 is a schematic diagram of a charge protection circuit of the present invention;
FIG. 5 is a schematic structural view of example 1 of the present invention;
FIG. 6 is a schematic structural view of example 2 of the present invention;
fig. 7 is an external view of a charging socket equipped with a power battery charger fault protection device or motherboard.
Detailed Description
As shown in fig. 1 to 3, the fault protection device for the power battery charger comprises a charging protection circuit arranged in a circuit shell 1, wherein the circuit shell 1 is composed of a shell 1-1 and a shell cover 1-2.
The intelligent charging device is characterized in that a mains supply interface TB1 is fixed on one side of one surface of the main board 2, an L interface, a ground interface and an N interface are arranged on the mains supply interface TB1, three leads, namely an L-OUT lead, a GND lead and an N-OUT lead, are arranged on the other side of one surface of the main board 2, a charging protection circuit is arranged on the other surface of the main board 2, the L interface, the ground interface and the N interface of the interface TB1 are connected with the input ends of the charging protection circuit, corresponding to the L, the ground and the N, and the L-OUT lead, the GND lead and the N-OUT lead penetrate through the main board 2 and are connected with the output ends of the charging protection circuit, such as the L-OUT, the GND and the N-OUT.
The mainboard 2 is arranged in the shell 1-1, the periphery of the mainboard 2 is lapped on the concave wall 1-1-1 and the two positioning plates 1-1-41 in the shell 1-1, the commercial power interface TB1 is exposed in the concave area 1-1-6 of the shell 1-1, and the other ends of the L-OUT lead, the GND lead and the N-OUT lead correspondingly penetrate through the three lead holes 1-1-51 on the end face of the shell 1-1 and extend OUT of the shell 1-1.
The shell cover 1-2 is buckled on the shell body 1-1, and the shell cover 1-2 and the shell body 1-1 are fixed together through the matching of the four convex buckles 1-2-1 of the shell cover 1-2 and the four buckle grooves 1-1-42 in the shell body 1-1.
As shown in fig. 4, the charging protection circuit includes a capacitor CY1, a capacitor CY2, a capacitor CY3, a fuse F1, a fuse F2, a voltage-dependent resistor VD1, and a mains interface TB 1.
Fusing current parameters of a fuse tube F1 and a fuse tube F2 are designed and selected according to the normal peak charging current of the power battery charger, and the threshold voltage of the voltage dependent resistor VD1 is designed and selected according to the commercial power voltage + 10%. If the voltage across the varistor VD1 does not exceed the threshold voltage, the varistor VD1 is in an open circuit state, and if the voltage across the varistor VD1 exceeds the threshold voltage, the varistor VD1 is fused into a conductor and is in a short circuit state.
Example 1, as shown in fig. 5, 7;
the upper cover 3-2 of the charging socket 3 is disassembled, the power battery charger fault protection device is fixedly adhered to the bottom plate 3-1 of the charging socket 3 by using an insulating double faced adhesive tape, the L, ground and N power lines of the commercial power are correspondingly connected to the L, ground and N interfaces of the commercial power interface TB1 of the charger fault protection device, the L-OUT lead, the GND lead and the N-OUT lead of the power battery charger fault protection device are correspondingly connected to the L, ground and N interfaces of the jack unit 3-3 of the charging socket 3, and the upper cover 3-2 of the charging socket 3 is assembled back to form the charging socket 3 with the power battery charger fault protection device; when the electric vehicle charger is used, a user inserts a plug of the charger with the power battery connected to the electric vehicle into a charging socket 3 with a fault protection device of the power battery charger for charging.
Example 2, as shown in fig. 6 and 7;
disassembling an upper cover 3-2 of a charging socket 3, bonding and fixing a mainboard 2 on a bottom plate 3-1 of the charging socket 3 by using an insulating double-sided adhesive tape, correspondingly connecting L, ground and N power lines of commercial power to L, ground and N of a commercial power interface TB1 of a charger fault protection device, correspondingly connecting an L-OUT lead, a GND lead and an N-OUT lead of the power battery charger fault protection device to L, ground and N interfaces of a jack unit 3-3 of the charging socket 3, and assembling the upper cover 3-2 of the charging socket 3 back to form the charging socket 3 with the power battery charger fault protection device; when the electric vehicle charger is used, a user inserts the charger connected with the power battery of the electric vehicle into the charging socket 3 with the fault protection device of the power battery charger for charging.
In example 3, the voltage is changed to 220V according to the normal voltage of the mains supply and floats up by 10%, the threshold number of the piezoresistor VD1 is set to 242V, and the fusing current parameters of the fuse tube F1 and the fuse tube F2 are set to 10A.
When the power battery charger fails or the isolation effect is reduced, the power battery reversely outputs high voltage higher than 242V of commercial power upper limit alternating current to the charging socket 3 through the charger, and the high voltage is conducted to the L end and the N end of the charging socket 3 and further conducted to the L-OUT end and the N-OUT end of the power battery charger fault protection device; when the voltage between the L-OUT and N-OUT output ends is abnormally high and exceeds the threshold value 242V of the piezoresistor VD1, the piezoresistor VD1 is fused and conducted, at the moment, a short circuit is formed between the L-OUT and N-OUT output ends of an external power grid through a fuse tube F2 and the piezoresistor VD1, meanwhile, a short circuit is formed between the L and N internal power grids through a fuse tube F1 and a piezoresistor VD1, so that the current flowing through the fuse tube F1 and the fuse tube F2 is increased, and when the current flowing through the fuse tube F1 and the fuse tube F2 exceeds the fusing current 10A, the fuse tube F1 and the fuse tube F2 are fused and are in an open circuit state, so that the internal power grid and the external power grid are disconnected; because the fuse F1 and the fuse F2 both adopt a quick-break type, and the capacitor CY1, the capacitor CY2 and the capacitor CY3 have the effect of absorbing voltage spikes, the voltage surge of an external power grid cannot be transmitted to an internal power grid, so that the effect of protecting the internal power grid is achieved.
Claims (4)
1. The utility model provides a power battery charger fault protection device which characterized in that: the charging protection circuit is arranged in a circuit shell (1) and consists of a capacitor CY1, a capacitor CY2, a capacitor CY3, a fuse F1, a fuse F2, a piezoresistor VD1 and a mains supply interface TB1 which are welded on a mainboard (2);
the capacitor CY1 and the capacitor CY2 are connected in series, one end of the capacitor CY1 is connected with one end of a fuse tube F1 and an input end L of a mains supply interface TB1 respectively, the other end of the fuse tube F1 is connected with one end of a piezoresistor VD1 and one end of a fuse tube F2 respectively, and the other end of the fuse tube F2 is connected with one end of a capacitor CY3 and serves as an output end L-OUT;
one end of the capacitor CY2 is connected with the input end N of the mains supply interface TB1 and the other end of the piezoresistor VD1 respectively and serves as an output end N-OUT;
the series end of the capacitor CY1 and the series end of the capacitor CY2 are respectively connected with the input ground of the mains supply interface TB1 and the other end of the capacitor CY3 and serve as an output end GND;
fusing current parameters of the fuse tube F1 and the fuse tube F2 are designed and selected according to the normal peak charging current of the power battery charger, the fuse tube F1 and the fuse tube F2 are in a quick-break type, and the fusing current parameter is 10A;
the threshold voltage parameter of the piezoresistor VD1 is designed and selected according to the commercial power voltage +10%, and the threshold voltage parameter of the piezoresistor VD1 is 242V;
the circuit shell (1) is composed of a shell body (1-1) and a shell cover (1-2);
the main board (2) is arranged in the shell (1-1), a mains supply interface TB1 on one side of the upper surface of the main board (2) is exposed in a concave area (1-1-6) of the shell (1-1), an L-OUT lead, a GND lead and an N-OUT lead are arranged on the other side of the upper surface of the main board (2), one ends of the L-OUT lead, the GND lead and the N-OUT lead respectively penetrate through the main board (2) and are connected with L-OUT, GND and N-OUT output ends of the charging protection circuit, the other ends of the L-OUT lead, the GND lead and the N-OUT lead respectively penetrate through three lead holes (1-1-51) of the shell (1-1) and extend OUT of the shell (1-1), and the shell (1-1) is fixed with the shell cover (1-2).
2. The power battery charger fault protection device of claim 1, wherein: the shell (1-1) is composed of a front concave wall (1-1-1), a U-shaped bottom surface (1-1-2), two front walls (1-1-3), two side walls (1-1-4) and a rear wall (1-1-5) which are of an integral structure, a concave area (1-1-6) is arranged on the outer side of the front concave wall (1-1-1), two positioning plates (1-1-41) and two buckling grooves (1-1-42) are symmetrically arranged on the two side walls (1-1-4) in the shell (1-1), the height of the front concave wall (1-1-1) is lower than that of the two front walls (1-1-3), the height of the two side walls (1-1-4) and the height of the rear wall (1-1-5) are the same as that of the two positioning plates (1-1-41), the rear wall (1-1-5) is provided with three lead holes (1-1-51).
3. The power battery charger fault protection device of claim 1, wherein: the shell cover (1-2) is rectangular, and two protruding buckles (1-2-1) are symmetrically arranged on two side edges of the shell cover (1-2) at intervals respectively.
4. A method of using the power battery charger fault protection device of claim 1, characterized by the steps of:
the method comprises the following steps of taking L, ground and N of a mains supply interface TB1 of a power battery charger fault protection device as an 'internal power grid';
three leads of L-OUT, GND and N-OUT of the fault protection device of the power battery charger are respectively connected with L, ground and N of a charging socket (3) to be used as an 'external power grid';
connecting L, ground and N of a power battery charger plug connected with a power battery with L, ground and N of a charging socket (3) for charging;
when the power battery charger fails or the isolation effect is reduced, the power battery reversely outputs high voltage higher than 242V of commercial power upper limit alternating current to the charging socket 3 through the charger, and the high voltage is conducted to the L end and the N end of the charging socket 3 and further conducted to the L-OUT end and the N-OUT end of the power battery charger fault protection device; when the voltage between the L-OUT and N-OUT output ends is abnormally high and exceeds the threshold value 242V of the piezoresistor VD1, the piezoresistor VD1 is fused and conducted, at the moment, a short circuit is formed between the L-OUT and N-OUT output ends of an external power grid through a fuse tube F2 and the piezoresistor VD1, meanwhile, a short circuit is formed between the L and N internal power grids through a fuse tube F1 and a piezoresistor VD1, so that the current flowing through the fuse tube F1 and the fuse tube F2 is increased, and when the current flowing through the fuse tube F1 and the fuse tube F2 exceeds the fusing current 10A, the fuse tube F1 and the fuse tube F2 are fused and are in an open circuit state, so that the internal power grid and the external power grid are disconnected; because the fuse F1 and the fuse F2 are both in a quick-break type, and the capacitor CY1, the capacitor CY2 and the capacitor CY3 have the function of absorbing voltage spikes, the voltage surge of an external power grid cannot be transmitted to an internal power grid, and the function of protecting the internal power grid is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210396287.9A CN114498571B (en) | 2022-04-15 | 2022-04-15 | Power battery charger fault protection device and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210396287.9A CN114498571B (en) | 2022-04-15 | 2022-04-15 | Power battery charger fault protection device and use method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114498571A CN114498571A (en) | 2022-05-13 |
| CN114498571B true CN114498571B (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210396287.9A Active CN114498571B (en) | 2022-04-15 | 2022-04-15 | Power battery charger fault protection device and use method |
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| CN (1) | CN114498571B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2103865U (en) * | 1991-10-26 | 1992-05-06 | 袁伯山 | Multifunctional safety power plug |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201001023Y (en) * | 2007-01-15 | 2008-01-02 | 上海盛善电气有限公司 | Power supply protective circuit of apparatus instrument |
| CN201829942U (en) * | 2010-09-30 | 2011-05-11 | 深圳茂硕电源科技股份有限公司 | Simple and practical lightning protection circuit |
| CN203826921U (en) * | 2014-04-15 | 2014-09-10 | 张海艇 | Charger short circuit protection device |
| CN205986215U (en) * | 2016-07-18 | 2017-02-22 | 周钰朋 | Lithium cell group charger |
| CN106253438A (en) * | 2016-08-25 | 2016-12-21 | 苏州苏宝新能源科技有限公司 | There is the solar air-conditioner system of charging and power lightning protection function |
| CN108599318A (en) * | 2018-05-31 | 2018-09-28 | 上海工程技术大学 | A kind of suicide for electric car charger protects circuit and judges algorithm |
| CN210693527U (en) * | 2019-08-31 | 2020-06-05 | 茂硕电源科技股份有限公司 | Charging circuit and charging device |
| CN213043464U (en) * | 2020-09-06 | 2021-04-23 | 福建信通慧安科技有限公司 | Electronic facility double-source centralized power supply device with lightning protection function |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2103865U (en) * | 1991-10-26 | 1992-05-06 | 袁伯山 | Multifunctional safety power plug |
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| CN114498571A (en) | 2022-05-13 |
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