240W-level electric vehicle program control charger circuit

Abstract

The utility model discloses a 240W grade electric vehicle program control charger circuit, comprising a low pass filter circuit module, a rectifier bridge, an RCD absorption circuit module, a transformer T1, a diode D4, a relay FJ1, a feedback voltage loop module, a feedback current loop module and the like, the 240W grade electric vehicle program control charger circuit uses a chip U10 as a core to form a flyback topology, uses a PQ3230 transformer to isolate output, and uses a relay FJ1 as a relay FJ1. And the relay controls output, and the feedback loop is matched with the voltage loop and the current loop to control the voltage and the current respectively so as to output the desired voltage and the desired current. Compared with the prior art, the charger has the advantages of being small in heat productivity, high in switching speed and capable of working without a fan, has the functions of over-temperature protection, over-power protection and overvoltage and undervoltage protection, and enables the safety of the charger to be greatly improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of charger circuits, and in particular to a 240W-class programmable charger circuit for electric vehicles. Background Art

[0002] Electric vehicle programmable chargers are widely used in charging various electric vehicles, including electric bicycles, electric scooters, electric trucks, forklifts, and transporters. Furthermore, they can also be applied to industrial equipment, automation equipment, and energy storage systems, providing stable and efficient charging solutions for various devices requiring charging.

[0003] The internal circuits of current electric vehicle programmable chargers are relatively complex, and a large amount of heat is generated during the charging process, requiring the use of a cooling fan. In addition, the charger's switching speed has a slow response speed, posing certain safety risks. Utility Model Content

[0004] The present disclosure provides a 240W electric vehicle programmable charger circuit to solve one of the technical problems recognized by the inventors.

[0005] The present disclosure provides a 240W electric vehicle programmable charger circuit, comprising: a low-pass filter circuit module having an input end connected to an external power supply, the output end of the low-pass filter circuit module connected to a rectifier bridge, the rectifier bridge connected to an electrolytic capacitor filter circuit module, the electrolytic capacitor filter circuit module connected to an RCD absorption circuit module, the RCD absorption circuit module connected to a chip U10 via a wire bus P1, the RCD absorption circuit module connected to one end of a transformer T1, the other end of the transformer T1 connected to a diode D4, one end of the diode D4 connected to a relay FJ1, the relay FJ1 connected to a diode D12, the diode D12 connected to an output interface OUT1, the chip U10 connected to a feedback voltage loop module, one end of the feedback voltage loop module connected to a feedback current loop module, and the feedback current loop module connected to one end of the transformer T1.

[0006] Preferably, the chip U10 is a JW15158K gallium nitride chip, the first pin of the chip U10 is connected to the eighth pin of the line P1, the second, third, and fourth pins of the chip U10 are connected to the tenth pin of the chip U10, the eleventh pin of the chip U10 is connected to capacitor C58, the twelfth pin of the chip U10 is connected to capacitor C57 and resistor R156, the thirteenth pin of the chip U10 is connected to capacitor C56 and resistor R172, the resistor R172 is connected to resistor R173, the resistor R173 is connected to capacitor C56, the fourteenth pin of the chip U10 is connected to the fourth pin of the line P1, the fifteenth pin of the chip U10 is connected to resistor R180, capacitor C54 and resistor R171, the resistor R180 is connected to the fifth pin of the line P1, and the sixteenth pin of the chip U10 is connected to the second pin of the line P1.

[0007] Preferably, the low-pass filter circuit module includes capacitors C0, C4, C5, inductors L0, and L1, the two ends of the capacitor C0 are respectively connected to one end of the inductor L0, the other end of the inductor L0 is connected to the two ends of the capacitor C4, the two ends of the capacitor C4 are respectively connected to one end of the inductor L1, the other end of the inductor L1 is connected to the two ends of the capacitor C5, and the capacitor C5 is connected to the rectifier bridge.

[0008] Preferably, the electrolytic capacitor filter circuit module includes capacitors C7 and C8, one end of the capacitor C7 is connected to the rectifier bridge, the other end of the capacitor C7 is connected to one end of the capacitor C8, and the other end of the capacitor C8 is connected to the seventh pin of the line bank P1.

[0009] Preferably, the RCD absorption circuit module includes a capacitor C50, resistors R140, R144, R148, R141, R145, and a diode D21, one end of the capacitor C50 is connected to the rectifier bridge, and the other end is connected to one end of the resistors R140, R144, R148, R141, and R145 respectively, one end of the capacitor C40, resistors R140, R144, and R148 is connected to the first pin of the transformer T1, one end of the resistors R144 and R148 is connected to one end of the diode D21, and the other end of the diode D21 is connected to the eighth pin of the bus P1 and the second pin of the transformer T1 respectively, and the eighth pin of the bus P1 is connected to the second pin of the transformer T1.

[0010] Preferably, capacitors C20 and C22 are connected between the diode D4 and the relay FJ1 , and the capacitor C20 and the capacitor C22 are connected in parallel.

[0011] Preferably, the feedback voltage loop module includes resistors R6, R9, adjustable resistors RH1, RH2, a diode U1, and an optocoupler U2. The third and fourth pins of the optocoupler U2 are respectively connected to the third and fourth pins of the line bank P1. The first pin of the optocoupler U2 is connected to the resistor R4. One end of the resistor R4 is connected to the third pin of the diode U1. The second pin of the optocoupler U2 is sequentially connected to the capacitor C3 and the resistor R5. One end of the resistor R5 is connected to the first pin of the diode U1. The first pin of the diode U1 is connected to one end of the adjustable resistor RH2. The other end of the adjustable resistor RH2 is connected to the collector of the transistor Q1. The emitter of the transistor Q1 is connected to the second pin of the diode U1. The adjustable resistor RH1 and the resistor R6 are connected in parallel between the diode U1 and the adjustable resistor RH2. One end of the adjustable resistor RH1 is connected to one end of the resistor R9. One end of the resistor R9 is connected to the feedback current loop module.

[0012] Preferably, the feedback current loop module includes a transistor Q2, resistors R11, R12, R16, R17, R24, a capacitor C12, and amplifiers U4A and U4B. The emitter and collector of the transistor Q2 are respectively connected to the two ends of the resistor R9, the base of the transistor Q2 is connected to one end of the resistor R11, and the emitter of the transistor Q2 is connected to one end of the resistor R12. The ends of the resistors R11 and R12 away from the transistor Q2 are connected to each other and to the first pin of the amplifier U4A. The first pin and the second pin of the amplifier U4A are connected. The resistor R16 and the capacitor C12 are connected in series between the first pin and the second pin of the amplifier U4A, the second pin of the amplifier U4A is connected to the sixth pin of the amplifier U4B, the resistors R17 and R24 are connected in series between the second pin of the amplifier U4A and the sixth pin of the amplifier U4B, the third pin of the amplifier U4A is connected to the fifth pin of the amplifier U4B, the third pin of the amplifier U4A and the fifth pin of the amplifier U4B are connected in series with resistors R20 and R21, and the seventh pin of the amplifier U4B is connected to the seventh pin of the transformer T1.

[0013] The beneficial effects of this disclosure are primarily as follows: The present invention utilizes the U10 chip as its core, forming a flyback topology. The PQ3230 transformer isolates the output, which is then controlled by a relay. The feedback loops, including voltage and current loops, control the voltage and current, respectively, to achieve the desired output voltage and current. This design offers low heat generation, fast switching speeds, and the ability to operate without a fan. Furthermore, it incorporates over-temperature protection, over-power protection, and over-voltage and under-voltage protection, significantly enhancing charger safety.

[0014] It should be understood that both the foregoing general description and the following detailed description are for purposes of illustration and description and are not necessarily limiting of the present disclosure. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate the subject matter of the present disclosure. Together, the description and the drawings serve to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a circuit diagram of chip U10 according to an embodiment of the present disclosure;

[0017] Figure 2 is a schematic diagram of an overall circuit of an embodiment of the present disclosure;

[0018] Figure 3 A partially enlarged schematic diagram of a low-pass filter circuit module and a rectifier bridge according to an embodiment of the present disclosure;

[0019] Figure 4 This is a partially enlarged schematic diagram of an RCD absorption circuit module according to an embodiment of the present disclosure;

[0020] Figure 5 This is a partially enlarged schematic diagram of the secondary end of the transformer T1 according to an embodiment of the present disclosure;

[0021] Figure 6 A partially enlarged schematic diagram of a feedback voltage loop module and a feedback current loop module according to an embodiment of the present disclosure;

[0022] Icons: 1- low-pass filter circuit module; 2- electrolytic capacitor filter circuit module; 3- RCD absorption circuit module; 4- feedback voltage loop module; 5- feedback current loop module. DETAILED DESCRIPTION

[0023] The technical solutions of the present disclosure will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0024] Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present disclosure.

[0025] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this disclosure and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.

[0027] Example

[0028] like Figure 1-6 As shown, this embodiment provides a 240W electric vehicle programmable charger circuit, including: a low-pass filter circuit module 1 whose input end is connected to an external power supply, the output end of the low-pass filter circuit module 1 is connected to a rectifier bridge, the rectifier bridge is connected to an electrolytic capacitor filter circuit module 2, the electrolytic capacitor filter circuit module 2 is connected to an RCD absorption circuit module 3, the RCD absorption circuit module 3 is connected to a chip U10 through a wire row P1, the RCD absorption circuit module 3 is connected to one end of a transformer T1, the other end of the transformer T1 is connected to a diode D4, one end of the diode D4 is connected to a relay FJ1, the relay FJ1 is connected to a diode D12, the diode D12 is connected to an output interface OUT1, the chip U10 is connected to a feedback voltage loop module 4, one end of the feedback voltage loop module 4 is connected to a feedback current loop module 5, and the feedback current loop module 5 is connected to one end of the transformer T1.

[0029] In this embodiment, the current input is low-pass filtered by the low-pass filter circuit module 1 and then rectified by the rectifier bridge. It is then filtered by the electrolytic capacitor filter circuit module 2, and after absorbing the peaks and oscillations of the gallium nitride MOS through the RCD absorption circuit, it flows into the drain of the built-in gallium nitride MOS tube of the chip U10 through the transformer T1, and then flows from the source to the ground, forming a flyback topology. It reaches the secondary through the step-up and step-down of the transformer, is half-wave rectified by the diode D4, and then filtered by the capacitors C20 and C22. The output is then controlled by the relay FJ1, and a feedback voltage loop module 4 and a feedback current loop module 5 are provided to perform voltage and current control so that the output end outputs the required voltage and current.

[0030] Specifically, the chip U10 is a JW15158K gallium nitride chip, the first pin of the chip U10 is connected to the eighth pin of the line P1, the second, third, and fourth pins of the chip U10 are connected to the tenth pin of the chip U10, the eleventh pin of the chip U10 is connected to capacitor C58, the twelfth pin of the chip U10 is connected to capacitor C57 and resistor R156, the thirteenth pin of the chip U10 is connected to capacitor C56 and resistor R172, the resistor R172 is connected to resistor R173, the resistor R173 is connected to capacitor C56, the fourteenth pin of the chip U10 is connected to the fourth pin of the line P1, the fifteenth pin of the chip U10 is connected to resistor R180, capacitor C54 and resistor R171, the resistor R180 is connected to the fifth pin of the line P1, and the sixteenth pin of the chip U10 is connected to the second pin of the line P1.

[0031] This circuit uses chip U10 as the core, along with peripheral circuits. The chip has a built-in gallium nitride MOS tube and provides over-temperature protection, over-power protection, over-voltage and under-voltage protection.

[0032] Specifically, the low-pass filter circuit module 1 includes capacitors C0, C4, and C5, and inductors L0 and L1. The two ends of capacitor C0 are respectively connected to one end of inductor L0, the other end of inductor L0 is connected to the two ends of capacitor C4, the two ends of capacitor C4 are respectively connected to one end of inductor L1, the other end of inductor L1 is connected to the two ends of capacitor C5, and capacitor C5 is connected to the rectifier bridge. Capacitors C0, C4, C5, inductors L0, and L1 constitute the low-pass filter circuit module 1, which filters and regulates the input signal.

[0033] Specifically, the electrolytic capacitor filter circuit module 2 includes capacitors C7 and C8. One end of capacitor C7 is connected to the rectifier bridge, the other end of capacitor C7 is connected to one end of capacitor C8, and the other end of capacitor C8 is connected to the seventh pin of the busbar P1. Electrolytic capacitor filtering is performed through capacitors C7 and C8.

[0034] Specifically, the RCD absorption circuit module 3 includes a capacitor C50, resistors R140, R144, R148, R141, R145, and a diode D21. One end of the capacitor C50 is connected to the rectifier bridge, and the other end is connected to one end of the resistors R140, R144, R148, R141, and R145 respectively. One end of the capacitor C40, resistors R140, R144, and R148 is connected to the first pin of the transformer T1, one end of the resistors R144 and R148 is connected to one end of the diode D21, and the other end of the diode D21 is connected to the eighth pin of the bus P1 and the second pin of the transformer T1 respectively. The eighth pin of the bus P1 is connected to the second pin of the transformer T1.

[0035] In this embodiment, the RCD absorption circuit module 3 composed of the capacitor C50, the resistors R140, R144, R148, R141, R145, and the diode D21 absorbs the spikes and oscillations of the gallium nitride MOS, making the output signal more stable.

[0036] Specifically, capacitors C20 and C22 are connected in parallel between diode D4 and relay FJ1. The voltage is boosted and stepped up by transformer T1 before reaching the secondary circuit. It undergoes half-wave rectification by diode D4 and then filtered by capacitors C20 and C22 before being output by relay FJ1.

[0037] Specifically, the feedback voltage loop module 4 comprises resistors R6, R9, adjustable resistors RH1, RH2, diode U1, optocoupler U2, the third and fourth pins of the optocoupler U2 are connected to the third and fourth pins of the line row P1 respectively, the first pin of the optocoupler U2 is connected with a resistor R4, one end of the resistor R4 is connected to the third pin of the diode U1, the second pin of the optocoupler U2 is connected with a capacitor C3 and a resistor R5 in sequence, one end of the resistor R5 is connected to the first pin of the diode U1, the first pin of the diode U1 is connected to one end of the adjustable resistor RH2, the other end of the adjustable resistor RH2 is connected to the collector of a transistor Q1, the emitter of the transistor Q1 is connected to the second pin of the diode U1, the adjustable resistor RH1 and the resistor R6 are connected in parallel between the diode U1 and the adjustable resistor RH2, one end of the adjustable resistor RH1 is connected to one end of the resistor R9, one end of the resistor R9 is connected to the feedback current loop module 5.

[0038] In the embodiment, the feedback voltage loop module 4 composed of resistors R6, R9, adjustable resistors RH1, RH2, diode U1 and optocoupler U2 controls the voltage output, so that the output voltage is controlled within the required range.

[0039] Specifically, the feedback current loop module 5 comprises a transistor Q2, resistors R11, R12, R16, R17, R24, a capacitor C12, amplifiers U4A, U4B, the emitter and collector of the transistor Q2 are connected to the two ends of the resistor R9 respectively, the base of the transistor Q2 is connected to one end of the resistor R11, the emitter of the transistor Q2 is connected to one end of the resistor R12, the resistors R11 and R12 are connected to each other at the ends away from the transistor Q2 and connected to the first pin of the amplifier U4A, the first and second pins of the amplifier U4A are connected, the resistor R16 and the capacitor C12 are connected in series between the first and second pins of the amplifier U4A, the second pin of the amplifier U4A is connected to the sixth pin of the amplifier U4B, the resistors R17, R24 are connected in series between the second pin of the amplifier U4A and the sixth pin of the amplifier U4B, the third pin of the amplifier U4A is connected to the fifth pin of the amplifier U4B, the resistors R20, R21 are connected in series between the third pin of the amplifier U4A and the fifth pin of the amplifier U4B, the seventh pin of the amplifier U4B is connected to the seventh pin of the transformer T1.

[0040] In the embodiment, the feedback current loop module 5 composed of the transistor Q2, resistors R11, R12, R16, R17, R24, capacitor C12, amplifiers U4A, U4B controls the current output, so that the current output is controlled within the required range.

[0041] The working principle of this utility model is as follows: JW15158K gallium nitride chip U10 is used as the core, and is matched with low-pass filter circuit module 1, rectifier bridge, electrolytic capacitor filter circuit module 2 and RCD absorption circuit module 3 to form a flyback topology, with PQ3230 transformer T1 isolating the output, and then output by relay FJ1.

[0042] Furthermore, the feedback loop is composed of a feedback voltage loop module 4 and a feedback current loop module 5, which respectively control the voltage and current to output the desired voltage and current.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A 240W electric vehicle program-controlled charger circuit, characterized in that: include: A low-pass filter circuit module whose input end is connected to an external power supply, the output end of the low-pass filter circuit module is connected to a rectifier bridge, the rectifier bridge is connected to an electrolytic capacitor filter circuit module, the electrolytic capacitor filter circuit module is connected to an RCD absorption circuit module, the RCD absorption circuit module is connected to a chip U10 through a wire bus P1, the RCD absorption circuit module is connected to one end of a transformer T1, the other end of the transformer T1 is connected to a diode D4, one end of the diode D4 is connected to a relay FJ1, the relay FJ1 is connected to a diode D12, the diode D12 is connected to an output interface OUT1, the chip U10 is connected to a feedback voltage loop module, one end of the feedback voltage loop module is connected to a feedback current loop module, and the feedback current loop module is connected to one end of the transformer T1.

2. A 240W electric vehicle program-controlled charger circuit according to claim 1, characterized in that: The chip U10 is a JW15158K gallium nitride chip. The first pin of the chip U10 is connected to the eighth pin of the bus P1. The second, third, and fourth pins of the chip U10 are connected to the tenth pin of the chip U10. The eleventh pin of the chip U10 is connected to a capacitor C58. The twelfth pin of the chip U10 is connected to a capacitor C57 and a resistor R156. The thirteenth pin of the chip U10 is connected to a capacitor C56 and a resistor R172. The resistor R172 is connected to a resistor R173. The resistor R173 is connected to the capacitor C56. The fourteenth pin of the chip U10 is connected to the fourth pin of the bus P1. The fifteenth pin of the chip U10 is connected to a resistor R180, a capacitor C54, and a resistor R171. The resistor R180 is connected to the fifth pin of the bus P1. The sixteenth pin of the chip U10 is connected to the second pin of the bus P1.

3. A 240W electric vehicle program-controlled charger circuit according to claim 1, characterized in that: The low-pass filter circuit module includes capacitors C0, C4, C5, inductors L0, and L1. The two ends of the capacitor C0 are respectively connected to one end of the inductor L0, and the other end of the inductor L0 is connected to the two ends of the capacitor C4. The two ends of the capacitor C4 are respectively connected to one end of the inductor L1, and the other end of the inductor L1 is connected to the two ends of the capacitor C5. The capacitor C5 is connected to the rectifier bridge.

4. A 240W electric vehicle program-controlled charger circuit according to claim 1, characterized in that: The electrolytic capacitor filter circuit module includes capacitors C7 and C8. One end of the capacitor C7 is connected to the rectifier bridge, the other end of the capacitor C7 is connected to one end of the capacitor C8, and the other end of the capacitor C8 is connected to the seventh pin of the line bank P1.

5. A 240W electric vehicle program-controlled charger circuit according to claim 1, characterized in that: The RCD absorption circuit module includes a capacitor C50, resistors R140, R144, R148, R141, R145, and a diode D21. One end of the capacitor C50 is connected to the rectifier bridge, and the other end is connected to one end of the resistors R140, R144, R148, R141, and R145 respectively. One end of the capacitor C40, resistors R140, R144, and R148 is connected to the first pin of the transformer T1, one end of the resistors R144 and R148 is connected to one end of the diode D21, and the other end of the diode D21 is connected to the eighth pin of the bus P1 and the second pin of the transformer T1 respectively. The eighth pin of the bus P1 is connected to the second pin of the transformer T1.

6. A 240W electric vehicle program-controlled charger circuit according to claim 1, characterized in that: Capacitors C20 and C22 are connected between the diode D4 and the relay FJ1 , and the capacitor C20 and the capacitor C22 are connected in parallel.

7. A 240W electric vehicle program-controlled charger circuit according to claim 1, characterized in that: The feedback voltage loop module includes resistors R6, R9, adjustable resistors RH1, RH2, a diode U1, and an optocoupler U2. The third and fourth pins of the optocoupler U2 are respectively connected to the third and fourth pins of the bus P1. The first pin of the optocoupler U2 is connected to the resistor R4. One end of the resistor R4 is connected to the third pin of the diode U1. The second pin of the optocoupler U2 is sequentially connected to the capacitor C3 and the resistor R5. One end of the resistor R5 is connected to the first pin of the diode U1. The first pin of the diode U1 is connected to one end of the adjustable resistor RH2. The other end of the adjustable resistor RH2 is connected to the collector of the transistor Q1. The emitter of the transistor Q1 is connected to the second pin of the diode U1. The adjustable resistor RH1 and the resistor R6 are connected in parallel between the diode U1 and the adjustable resistor RH2. One end of the adjustable resistor RH1 is connected to one end of the resistor R9. One end of the resistor R9 is connected to the feedback current loop module.

8. A 240W electric vehicle program-controlled charger circuit according to claim 7, characterized in that: The feedback current loop module includes a transistor Q2, resistors R11, R12, R16, R17, R24, a capacitor C12, and amplifiers U4A and U4B. The emitter and collector of the transistor Q2 are respectively connected to the two ends of the resistor R9, the base of the transistor Q2 is connected to one end of the resistor R11, and the emitter of the transistor Q2 is connected to one end of the resistor R12. The ends of the resistors R11 and R12 away from the transistor Q2 are connected to each other and to the first pin of the amplifier U4A. The first pin and the second pin of the amplifier U4A are connected. The resistor R16 and the capacitor C12 are connected in series between the first pin and the second pin of the amplifier U4A, the second pin of the amplifier U4A is connected to the sixth pin of the amplifier U4B, the resistors R17 and R24 are connected in series between the second pin of the amplifier U4A and the sixth pin of the amplifier U4B, the third pin of the amplifier U4A is connected to the fifth pin of the amplifier U4B, the third pin of the amplifier U4A and the fifth pin of the amplifier U4B are connected in series with resistors R20 and R21, and the seventh pin of the amplifier U4B is connected to the seventh pin of the transformer T1.

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