CN210101346U - Self-protection electric bicycle charger - Google Patents

Self-protection electric bicycle charger Download PDF

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Publication number
CN210101346U
CN210101346U CN201920322420.XU CN201920322420U CN210101346U CN 210101346 U CN210101346 U CN 210101346U CN 201920322420 U CN201920322420 U CN 201920322420U CN 210101346 U CN210101346 U CN 210101346U
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circuit
output
electrically connected
input end
sub
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梁昌宇
徐孟霞
韦锋
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Guangdong Gao Lvneng Electronic Science And Technology Co Ltd
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Guangdong Gao Lvneng Electronic Science And Technology Co Ltd
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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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/14—Plug-in electric vehicles

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model provides a self-protection electric bicycle charger, which comprises a shell, a charging module, a commercial power interface, a charging port and a relay control module, wherein the charging module, the commercial power interface, the charging port and the relay control module are arranged in the shell; wherein: the commercial power interface is electrically connected with the input end of the relay control module; the output end of the relay control module is electrically connected with the input end of the charging module; the output end of the charging module is electrically connected with the charging port and the input end of the relay control module. The utility model provides a pair of self preservation protects electric bicycle charger, through setting up relay control module, be connected with the module of charging, according to the signal of telecommunication of the real-time feedback of the module of charging, control relay control module's break-make has realized when rechargeable battery is unusual, perhaps does not pull out under the condition of commercial power for a long time, will charge the circuit disconnection of module, effectively prevents to burn out the charger to the safe handling of the electric bicycle battery of protection.

Description

Self-protection electric bicycle charger
Technical Field
The utility model relates to a technical field is used to the charger, and is more specific relates to a self preservation protects electric bicycle charger.
Background
Along with the wide popularization and application of the electric bicycle, people pay more and more attention to the safe use of the electric bicycle, wherein, how to realize the safe charging of the electric bicycle, prolong the service life of a battery of the electric bicycle and improve the safety of the battery use is one of the most concerned points of people.
Aiming at the problem of overcharging of an electric bicycle battery commonly existing at present, an electric bicycle charger with power-off protection exists in the market, but the power-off principle of the charger only enables the direct current DC output to be 0 and does not provide load voltage. Because the rear-stage circuit of the charger is not powered off, the charger is possibly burnt out when the rechargeable battery is abnormal or the commercial power is not pulled out for a long time, and the battery of the electric bicycle is further damaged.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above current electric bicycle charger and only make direct current DC output be 0, charger back stage circuit does not cut off the power supply, when rechargeable battery is unusual, perhaps does not pull out under the condition of commercial power for a long time, has the charger of burning out, damages the technical defect of electric bicycle battery, provides a self preservation protects electric bicycle charger.
In order to realize the purpose of the utility model, the technical proposal is that:
a self-protection electric bicycle charger comprises a shell, a charging module, a mains supply interface, a charging port and a relay control module, wherein the charging module, the mains supply interface, the charging port and the relay control module are arranged in the shell; wherein:
the commercial power interface is electrically connected with the input end of the relay control module;
the output end of the relay control module is electrically connected with the input end of the charging module;
the output end of the charging module is electrically connected with the charging port and the input end of the relay control module.
Wherein, the module of charging includes first rectification filter circuit, input protection circuit, power conversion circuit, PWM control circuit, second rectification filter circuit, output protection circuit, prevents reverse connection circuit and DC output circuit, wherein:
the input end of the first rectifying and filtering circuit is electrically connected with the output end of the relay control module;
the output end of the first rectification filter circuit is electrically connected with the input end of the power conversion circuit;
the output end of the power conversion circuit is electrically connected with the input end of the second rectification filter circuit;
the output end of the second rectification filter circuit is electrically connected with the input end of the reverse connection preventing circuit;
the output end of the reverse connection preventing circuit is electrically connected with the DC output circuit;
the output end of the first rectifying and filtering circuit is electrically connected with the input end of the PWM control circuit through the input protection circuit;
the output end of the DC output circuit is electrically connected with the input end of the PWM control circuit through the output protection circuit;
the output end of the DC output circuit is electrically connected with the input end of the relay control module;
the output end of the PWM control circuit is electrically connected with the input end of the power conversion circuit;
the DC output circuit is electrically connected with the charging port.
And the power conversion circuit is provided with an RCD absorption sub-circuit.
The anti-reverse connection circuit specifically comprises: the diode is connected in series with the positive output voltage, and if the load is reversely connected, the diode is not conducted.
The output protection circuit comprises a voltage stabilizing sub-circuit, an overvoltage protection sub-circuit and a short-circuit protection sub-circuit; wherein:
the input end of the voltage-stabilizing sub-circuit, the input end of the overvoltage protection sub-circuit and the input end of the short-circuit protection sub-circuit are electrically connected with the output end of the DC output circuit;
and the output end of the voltage-stabilizing sub-circuit, the output end of the overvoltage protection sub-circuit and the output end of the short-circuit protection sub-circuit are electrically connected with the input end of the PWM control circuit.
Wherein, input protection circuit is including inputing crossing undervoltage protection sub-circuit and inputing overcurrent protection sub-circuit, wherein:
the input end of the input over-voltage and under-voltage protection sub-circuit and the input end of the input over-current and under-voltage protection sub-circuit are both electrically connected with the output end of the first rectification filter circuit;
and the output end of the input over-voltage and under-voltage protection sub-circuit and the output end of the input over-current and under-voltage protection sub-circuit are electrically connected with the input end of the PWM control circuit.
The charging module further comprises an output current sampling circuit, an overcurrent protection circuit, a state monitoring circuit and an auxiliary control circuit; wherein:
the input end of the output current sampling circuit is electrically connected with the output end of the DC output circuit;
the output end of the output current sampling circuit is electrically connected with the PWM control circuit through the overcurrent protection circuit;
the output end of the output current sampling circuit is electrically connected with the input end of the state monitoring circuit;
the output end of the state monitoring circuit is electrically connected with the auxiliary control circuit;
the charging module is electrically connected with the relay control module through the output current sampling circuit.
Wherein the state monitoring circuit outputs a high level or a low level to the auxiliary control circuit through an overvoltage comparator.
The auxiliary control circuit comprises an indicator light control sub-circuit and a fan control sub-circuit; the indicating lamp control sub-circuit is used for controlling the indicating lamp of the charger; the fan control sub-circuit is used for controlling a heat dissipation fan inside the charger.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a pair of self preservation protects electric bicycle charger, through setting up relay control module, be connected with the module of charging, according to the signal of telecommunication of the real-time feedback of the module of charging, control relay control module's break-make has realized when rechargeable battery is unusual, perhaps does not pull out under the condition of commercial power for a long time, will charge the circuit disconnection of module, effectively prevents to burn out the charger to the safe handling of the electric bicycle battery of protection.
Drawings
FIG. 1 is a schematic diagram of a charger;
FIG. 2 is a schematic diagram of a charger module connection;
FIG. 3 is a circuit diagram of a relay control module;
FIG. 4 is a connection diagram of a first rectifying-filtering circuit;
FIG. 5 is a circuit diagram of a charging module
Wherein: 1. a housing; 2. a charging module; 201. a first rectifying and filtering circuit; 202. an input protection circuit; 2021. inputting an over-voltage and under-voltage protection sub-circuit; 2022. inputting an overcurrent protection sub-circuit; 203. a power conversion circuit; 204. a PWM control circuit; 205. a second rectifying and filtering circuit; 206. an output protection circuit; 2061. a voltage regulator sub-circuit; 2062. an overvoltage protection sub-circuit; 2063. a short circuit protection sub-circuit; 207. an anti-reverse connection circuit; 208. a DC output circuit; 209. an output current sampling circuit; 210. an overcurrent protection circuit; 211. a status monitoring circuit; 212. an auxiliary control circuit; 2121. an indicator light control sub-circuit; 2122. a fan control sub-circuit; 3. a mains supply interface; 4. a charging port; 5. and a relay control module.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
the invention is further explained below with reference to the drawings and examples.
Example 1
As shown in fig. 1 and 2, a self-protection electric bicycle charger includes a housing 1, a charging module 2, a commercial power interface 3, a charging port 4 and a relay control module 5, which are arranged inside the housing 1; wherein:
the commercial power interface 3 is electrically connected with the input end of the relay control module 5;
the output end of the relay control module 5 is electrically connected with the input end of the charging module 2;
the output end of the charging module 2 is electrically connected with the charging port 4 and the input end of the relay control module 5.
More specifically, the charging module 2 includes a first rectifying and filtering circuit 201, an input protection circuit 202, a power conversion circuit 203, a PWM control circuit 204, a second rectifying and filtering circuit 205, an output protection circuit 206, an anti-reverse connection circuit 207, and a DC output circuit 208, wherein:
the input end of the first rectifying and filtering circuit 201 is electrically connected with the output end of the relay control module 5;
the output end of the first rectifying and filtering circuit 201 is electrically connected with the input end of the power conversion circuit 203;
the output end of the power conversion circuit 203 is electrically connected with the input end of the second rectifying and filtering circuit 205;
the output end of the second rectifying and filtering circuit 205 is electrically connected with the input end of the reverse connection preventing circuit 207;
the output end of the reverse connection preventing circuit 207 is electrically connected with the DC output circuit 208;
the output end of the first rectifying and filtering circuit 201 is electrically connected with the input end of the PWM control circuit 204 through the input protection circuit 202;
the output end of the DC output circuit 208 is electrically connected to the input end of the PWM control circuit 204 through the output protection circuit 206;
the output end of the DC output circuit 208 is electrically connected with the input end of the relay control module 5;
the output end of the PWM control circuit 204 is electrically connected to the input end of the power conversion circuit 203;
the DC output circuit 208 is electrically connected to the charging port 4.
In the specific implementation process, as shown in fig. 3, the 12V power supply directly works for the normally closed relay K1, and the MIN-D end returned by the charging port 4 gives a signal: when the voltage is high, the triode Q5 is conducted, the pins 3 and 4 of the U7 are low, the triode Q6 is not conducted, the relay K1 does not work, the normally closed state is kept, and otherwise, the normally closed state is reversed. At the moment of power-on, the relay K1 is in a closed state, the rear-stage first rectifying and filtering circuit 201 provides direct-current DC output to charge a load, if the load is not connected or is fully charged, the charging port 4 returns to a low level, the U7 is not turned on, the relay K1 is turned off, the rear-stage circuit is powered off, the power-off state is kept all the time, the commercial power at the input end is disconnected, the driving power source LN-12V of the relay K1 is powered off, and the relay K1 is closed; if the charging circuit is connected with a load, under the charging condition, the MIN-D end is at a high level, the relay K1 keeps a normally closed state all the time, and the subsequent stage circuit is kept normally charged.
In a specific implementation process, as shown in fig. 4, after passing through the relay control module 5 through the commercial power interface 3, the commercial power enters the first rectifying and filtering circuit 201 composed of the diodes D8, D9, D10 and D11, and is filtered by the electrolytic capacitor CD6, and then is converted into a relatively pure dc voltage.
More specifically, the power conversion circuit 203 is provided with an RCD absorption sub-circuit.
More specifically, the reverse connection preventing circuit 207 specifically includes: the diode is connected in series with the positive output voltage, and if the load is reversely connected, the diode is not conducted.
The output protection circuit 206 includes a voltage regulator sub-circuit 2061, an overvoltage protection sub-circuit 2062, and a short-circuit protection sub-circuit 2063; wherein:
the input end of the voltage-stabilizing sub-circuit 2061, the input end of the overvoltage protection sub-circuit 2062 and the input end of the short-circuit protection sub-circuit 2063 are electrically connected with the output end of the DC output circuit 208;
the output end of the voltage-stabilizing sub-circuit 2061, the output end of the overvoltage protection sub-circuit 2062 and the output end of the short-circuit protection sub-circuit 2063 are electrically connected with the input end of the PWM control circuit 204.
More specifically, the input protection circuit 202 includes an input under-voltage protection sub-circuit 2021 and an input over-current protection sub-circuit 2022, where:
the input end of the input over-voltage and under-voltage protection sub-circuit 2021 and the input end of the input over-current and under-voltage protection sub-circuit 2022 are both electrically connected to the output end of the first rectifying and filtering circuit 201;
the output end of the input over-voltage and under-voltage protection sub-circuit 2021 and the output end of the input over-current and under-voltage protection sub-circuit 2022 are electrically connected to the input end of the PWM control circuit 204.
More specifically, the charging module 2 further includes an output current sampling circuit 209, an overcurrent protection circuit 210, a state monitoring circuit 211, and an auxiliary control circuit 212; wherein:
the input end of the output current sampling circuit 209 is electrically connected with the output end of the DC output circuit 208;
the output end of the output current sampling circuit 209 is electrically connected with the PWM control circuit 204 through the overcurrent protection circuit 210;
the output end of the output current sampling circuit 209 is electrically connected with the input end of the state monitoring circuit 211;
the output end of the state monitoring circuit 211 is electrically connected to the auxiliary control circuit 212;
the charging module 2 is electrically connected with the relay control module 5 through the output current sampling circuit 209.
More specifically, the state monitoring circuit 211 outputs a high level or a low level to the auxiliary control circuit 212 through a voltage comparator.
More specifically, the auxiliary control circuit 212 includes an indicator light control sub-circuit 2121, a fan control sub-circuit 2122; the indicator light control sub-circuit 2121 is used for controlling the indicator light of the charger; the fan control sub-circuit is used for controlling a heat dissipation fan inside the charger.
In the specific implementation process, the relay control module 5 is connected with the charging module 2, and the on-off of the relay control module 5 is controlled according to the real-time feedback electric signal of the charging module 2, so that the circuit of the charging module is disconnected when the charging battery is abnormal or under the condition of not pulling out the commercial power for a long time, the charger is effectively prevented from being burnt out, and the protected electric bicycle battery is safely used.
Example 2
In the specific implementation process, as shown in fig. 5, in the power conversion circuit 203, Q4 is a MOS transistor, which is used as an on-off switch of the primary input of the transformer, and is connected in series to the primary input end of the transformer, and has the characteristics of high voltage resistance, high current conduction, small on-resistance, low driving voltage, and the like; the heat dissipation capability of the MOS tube Q4 is further improved by using the heat dissipation sheet S-Q1; the PWM control circuit 204 outputs a PWM driving signal through a special switching power supply chip U1 to control the on/off of the MOS transistor Q4, i.e., to control the on/off of the primary input of the power transformer.
More specifically, a bleeder circuit consisting of a PNP triode Q3, a resistor R34 and a resistor R36 accelerates the on-off time of the MOS tube; the resistor R23 is in a fixed initial state during power-on, and the MOS tube is ensured not to malfunction at the moment of power-on.
In the specific implementation process, the RCD absorption sub-circuit consists of a high-speed diode D6, a capacitor CH2 and resistors R39, R40, R41 and R42, and the MOS tube is protected from high-voltage breakdown when the MOS tube is disconnected. When the MOS tube is disconnected, the leakage inductance of the transformer generates an induced voltage, the MOS tube is easy to break down, and the induced voltage is limited in a safe voltage by the RCD absorption sub-circuit due to the RCD absorption sub-circuit.
In the specific implementation process, a small resistor R30 and a diode D3 are connected in series to form unidirectional rectification, and the CD1 and the C7 are rectified and filtered to obtain the auxiliary voltage VDD at the input end. VDD varies with input voltage variations.
In the specific implementation process, the operating voltage VDD of the switching power supply special chip U1 changes, and the U1 can normally operate only when the input voltage is within the designed range; through the arrangement of the input over-voltage and under-voltage protection sub-circuit 2021, when under voltage is applied, the auxiliary voltage VDD at the input end does not reach the working voltage of U1, no PWM drive output exists, the MOS tube Q4 is in a switch-off state, and no input exists at the primary stage of the transformer; when the voltage is over-voltage, the auxiliary voltage VDD of the input end exceeds the working voltage range of U1, the MOS tube Q4 is in a switch-off state, and the primary side of the transformer has no input; in the input overcurrent protection sub-circuit 2022, a resistor RD2 is connected in series with the MOS transistor Q4 and the primary side of the transformer to the ground end to be used as an input current sample, when overcurrent is input, the voltage of the end RD2 is high, namely the voltage of a detection pin connected to U1 is high, U1 stops PWM output, Q4 is in a switch off state, the primary side of the transformer has no input, and therefore the overcurrent condition of the circuit is protected.
More specifically, the ultra-fast rectifier diode D2 performs unidirectional rectification, and the high-frequency aluminum electrolytic capacitor CD4 obtains stable direct-current voltage. The resistors R31, R32, R33, R35 and the capacitor CH1 form a peak absorption circuit, and the peak absorption circuit absorbs the self-induction voltage of the primary winding of the switching transformer and protects the ultra-fast rectifier diode D2; the resistors R43 and R44 are used as loads during light load and are connected in parallel behind the CD4, so that the output stability is ensured. After rectification, the DC power supply is connected with the CD3 in parallel and connected with a CL filter circuit of the LF1 in series, so that output ripple is further reduced and interference resistance is further improved.
More specifically, the schottky rectifying diode D7 performs unidirectional rectification, the high-frequency aluminum electrolytic capacitor CD5 and the high-frequency aluminum electrolytic capacitor C6 perform filtering, and the output voltage changes along with the change of the input current.
In the specific implementation process, by utilizing the unidirectional conduction characteristic of the diode, the reverse connection preventing circuit 207 is arranged behind the second rectifying and filtering circuit 205, the serial connection D1 is connected with the positive voltage output, if the load is reversely connected, the D1 is not conducted, the internal power supply cannot be connected, and the fault connection protection effect is realized; after passing through the reverse connection preventing circuit 207, the charging voltage is directly output at the DC output circuit 208.
In a specific implementation process, in the voltage regulator sub-circuit 2061, the output voltage passes through the sampling circuit formed by the resistors R18, R19, R12 and R15, the adjustable resistor VR1 and the resistor R7, and is compared with the reference source U4, and the comparison result directly affects the output of the feedback optocoupler, so that the duty ratio of the PWM driving signal of the special chip U1 is changed, and the output voltage is adjusted. If the output VBAT + is increased, the sampling voltage is larger than the voltage of the R end of the reference source U4, and the reference voltage is 2.5V, the current flowing through the U4 is increased, namely the current flowing through the optocoupler input stage is increased, the voltage of the 2 pin of the U1 is decreased, the output PWM duty ratio is decreased, and finally the output voltage is decreased, if the output voltage is increased too much, namely overvoltage occurs, the U1 directly stops PWM output, namely the output is stopped as a result. Conversely, if the output VBAT + falls, the PWM duty cycle of the output of U7 becomes larger and the output voltage rises.
In the specific implementation process, in the short-circuit protection sub-circuit 2063, the recoverable fuse F2 is connected in series to the output ground for short-circuit protection, when the load is in a short circuit, the resistance of the F2 becomes very large, the load is protected from being burned out due to overcurrent, and under the normal condition, the resistance of the F2 is very small, and the circuit is not affected.
In the specific implementation process, a resistor RD1 with small resistance value, high power and low temperature drift is connected in series with the ground end of the load in the output current sampling circuit 209, and the terminal voltage VBAT-is taken as the basis for load current detection and other function detection.
In the embodiment, in the state monitoring circuit 211, a reference voltage divided by the reference source U5 and the resistors R4 and R20 is compared with the reference voltage by the comparator U2A using the sampling voltage VBAT "at the RD1 terminal, and a low level or a high level is output from the comparator and supplied to the indicator lamp control circuit 2121 and the fan control circuit 2122.
In a specific implementation process, in the overcurrent protection circuit 210, an overcurrent reference voltage formed by dividing voltage by a reference source U5 and resistors R4 and R20 is compared with the overcurrent reference voltage by a comparator U2A through a RD1 end sampling voltage VBAT-, and once overcurrent occurs, the comparator outputs a low level, so that the voltage fed back to the U1 by the feedback optocoupler is reduced, the output PWM duty ratio is reduced, the input is reduced, and the output current is reduced. If the instantaneous overcurrent is large, the voltage fed back to the U1 by the feedback optocoupler is small, and the PWM output is directly stopped, namely the output is stopped.
In the specific implementation process, the indicator lamp control circuit 2121 comprises a trickle reference voltage formed by dividing a reference source U5 and resistors R24 and R10, a sampling voltage VBAT-at the end RD1 is compared with the trickle reference voltage through a comparator U2B, when a load current is smaller than a set trickle current value, the comparator outputs a low level, and an indicator lamp circuit formed by resistors R17, R6, R2, a triode Q1 and a two-color light emitting diode LED turns off a Q1 because the comparator outputs the low level, so that a green lamp of the LED is turned on to indicate that a battery is fully charged or not charged. Conversely, when the load current is greater than the trickle current value, the comparator outputs a high level, and the red lamp of the LED is lit, indicating that charging is underway.
In the implementation, the fan control circuit 2122 forms the driving of the heat dissipation fan through the resistors R14 and Q2, and D5 is reversely connected to provide a discharge circuit when the fan is disconnected at two ends XH1 of the driving of the fan. The trickle reference voltage formed by dividing the voltage of the reference source U5 and the resistors R24 and R10 is compared with the trickle reference voltage through the comparator U2B by the sampling voltage VBAT-at the end RD1, when the load current is smaller than the set trickle current value, the comparator outputs low level, Q2 is cut off, the fan stops working, and the battery is fully charged or not charged.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (9)

1. The utility model provides a self preservation protects electric bicycle charger which characterized in that: the intelligent charging device comprises a shell (1), a charging module (2), a mains supply interface (3), a charging port (4) and a relay control module (5), wherein the charging module, the mains supply interface (3), the charging port and the relay control module are arranged in the shell (1); wherein:
the commercial power interface (3) is electrically connected with the input end of the relay control module (5);
the output end of the relay control module (5) is electrically connected with the input end of the charging module (2);
the output end of the charging module (2) is electrically connected with the charging port (4) and the input end of the relay control module (5).
2. The self-protected electric bicycle charger according to claim 1, wherein: the charging module (2) comprises a first rectifying and filtering circuit (201), an input protection circuit (202), a power conversion circuit (203), a PWM control circuit (204), a second rectifying and filtering circuit (205), an output protection circuit (206), an anti-reverse connection circuit (207) and a DC output circuit (208), wherein:
the input end of the first rectifying and filtering circuit (201) is electrically connected with the output end of the relay control module (5);
the output end of the first rectifying and filtering circuit (201) is electrically connected with the input end of the power conversion circuit (203);
the output end of the power conversion circuit (203) is electrically connected with the input end of the second rectifying and filtering circuit (205);
the output end of the second rectifying and filtering circuit (205) is electrically connected with the input end of the anti-reverse connection circuit (207);
the output end of the reverse connection preventing circuit (207) is electrically connected with the DC output circuit (208);
the output end of the first rectifying and filtering circuit (201) is electrically connected with the input end of the PWM control circuit (204) through the input protection circuit (202);
the output end of the DC output circuit (208) is electrically connected with the input end of the PWM control circuit (204) through the output protection circuit (206);
the output end of the DC output circuit (208) is electrically connected with the input end of the relay control module (5);
the output end of the PWM control circuit (204) is electrically connected with the input end of the power conversion circuit (203);
the DC output circuit (208) is electrically connected with the charging port (4).
3. A self-protected electric bicycle charger according to claim 2, wherein: and an RCD absorption sub-circuit is arranged on the power conversion circuit (203).
4. A self-protected electric bicycle charger according to claim 2, wherein: the anti-reverse connection circuit (207) is specifically as follows: the diode is connected in series with the positive output voltage, and if the load is reversely connected, the diode is not conducted.
5. A self-protected electric bicycle charger according to claim 2, wherein: the output protection circuit (206) comprises a voltage-stabilizing sub-circuit (2061), an overvoltage protection sub-circuit (2062) and a short-circuit protection sub-circuit (2063); wherein:
the input end of the voltage-stabilizing sub-circuit (2061), the input end of the overvoltage protection sub-circuit (2062) and the input end of the short-circuit protection sub-circuit (2063) are electrically connected with the output end of the DC output circuit (208);
the output end of the voltage stabilizing sub-circuit (2061), the output end of the overvoltage protection sub-circuit (2062) and the output end of the short-circuit protection sub-circuit (2063) are electrically connected with the input end of the PWM control circuit (204).
6. A self-protected electric bicycle charger according to claim 2, wherein: the input protection circuit (202) comprises an input under-voltage protection sub-circuit (2021) and an input over-current protection sub-circuit (2022), wherein:
the input end of the input over-voltage and under-voltage protection sub-circuit (2021) and the input end of the input over-current and under-voltage protection sub-circuit (2022) are electrically connected with the output end of the first rectifying and filtering circuit (201);
the output end of the input over-voltage and under-voltage protection sub-circuit (2021) and the output end of the input over-current and under-voltage protection sub-circuit (2022) are electrically connected with the input end of the PWM control circuit (204).
7. The self-protected electric bicycle charger according to claim 5, wherein: the charging module (2) further comprises an output current sampling circuit (209), an overcurrent protection circuit (210), a state monitoring circuit (211) and an auxiliary control circuit (212); wherein:
the input end of the output current sampling circuit (209) is electrically connected with the output end of the DC output circuit (208);
the output end of the output current sampling circuit (209) is electrically connected with the PWM control circuit (204) through the overcurrent protection circuit (210);
the output end of the output current sampling circuit (209) is electrically connected with the input end of the state monitoring circuit (211);
the output end of the state monitoring circuit (211) is electrically connected with the auxiliary control circuit (212);
the charging module (2) is electrically connected with the relay control module (5) through the output current sampling circuit (209).
8. A self-protected electric bicycle charger according to claim 7, wherein: the state monitoring circuit (211) outputs a high level or a low level to the auxiliary control circuit (212) through a voltage comparator.
9. A self-protected electric bicycle charger according to claim 7 or 8, wherein: the auxiliary control circuit (212) comprises an indicator light control sub-circuit (2121) and a fan control sub-circuit (2122); the indicator light control sub-circuit (2121) is used for controlling the charger indicator light; the fan control sub-circuit is used for controlling a heat dissipation fan inside the charger.
CN201920322420.XU 2019-03-13 2019-03-13 Self-protection electric bicycle charger Active CN210101346U (en)

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Application Number Priority Date Filing Date Title
CN201920322420.XU CN210101346U (en) 2019-03-13 2019-03-13 Self-protection electric bicycle charger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920322420.XU CN210101346U (en) 2019-03-13 2019-03-13 Self-protection electric bicycle charger

Publications (1)

Publication Number Publication Date
CN210101346U true CN210101346U (en) 2020-02-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920322420.XU Active CN210101346U (en) 2019-03-13 2019-03-13 Self-protection electric bicycle charger

Country Status (1)

Country Link
CN (1) CN210101346U (en)

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