New energy forklift power supply control loop and forklift

Abstract

The utility model embodiment provides a new energy forklift power supply control loop and forklift belong to forklift technical field. This power supply control loop and forklift can normally carry out low voltage power supply, also through setting delay power-off relay for realizing the delay power-off of power supply circuit to guarantee the safe power-off of high voltage, setting identity switch module simultaneously to the authorized identification of operator, guarantee the security of power supply operation, and set up first low voltage power supply circuit and the low voltage control system connection of outside is convenient, to realize delay power-off, set up PDU module can realize the real -time charging of battery, avoid the power shortage of battery, lead to the vehicle unable to start, thereby guarantee the reliability and safety of forklift use.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, specifically to a power supply control circuit for a new energy forklift and the forklift itself. Background Technology

[0002] With the continuous development of new energy technologies, their application in industrial vehicles is increasing daily. Power supply for new energy industrial vehicles includes power sources and battery power, providing both high-voltage and low-voltage power. Current traditional forklift power control relies primarily on mechanical emergency power-off switches and key switches. This simple control method may result in some electrical units still having significant standby current after the vehicle stops operating, easily causing battery depletion, affecting battery life, or even rendering the vehicle unusable. Furthermore, in traditional control methods, if the load has not completely stopped operating during power failure, a direct disconnection of the power supply may cause a "hot-plugging" phenomenon, where a sudden surge of current can easily damage components such as discharge relays. Therefore, a circuit control capable of delayed power-off is needed. This circuit could recharge batteries that have depleted due to prolonged standby time, ensuring they remain in good condition. It could also ensure a delayed power-off after the forklift stops operating and the electrical equipment ceases operation, safely disconnecting the high-voltage power supply to guarantee the safe operation of the forklift. Utility Model Content To overcome the aforementioned technical problems, this utility model provides a power supply control circuit and forklift for a new energy forklift. This power supply control circuit and forklift can normally supply low-voltage power, and also uses a delayed power-off relay to achieve delayed power-off of the power supply circuit, thereby ensuring safe high-voltage power-off. Simultaneously, an identity switch module is included to authorize and identify operators, ensuring the safety of power supply operations. Furthermore, a first low-voltage power supply circuit is provided for easy connection to an external low-voltage control system to achieve delayed power-off. A PDU module is included to enable real-time charging of the battery, preventing battery depletion that could prevent the vehicle from starting, thus ensuring the reliability and safety of the forklift's use.

[0003] To achieve the above objectives, this utility model provides a power supply control circuit for a new energy forklift, the power supply control circuit including: a storage battery; A main switch, one end of which is connected to the positive terminal of the battery; An identity switch module, one end of which is connected to the other end of the main switch; A time-delay power-off relay, wherein the first terminal of the time-delay power-off relay is connected to the other terminal of the identity switch module, the second terminal of the time-delay power-off relay is connected to the negative terminal of the battery, and the third terminal of the time-delay power-off relay is connected to the other terminal of the main switch; The first low-voltage power supply circuit has one end connected to the fourth terminal of the time-delay power-off relay, and the other end connected to an external low-voltage system. The PDU module has its positive terminal connected to the other end of the main switch, and its negative terminal connected to the negative terminal of the battery.

[0004] Preferably, the identity switch module includes: A first fuse, one end of which is connected to one end of the identity switch module; A key switch, one end of which is connected to the other end of the first fuse; An identity recognition switch, one end of which is connected to the other end of the key switch, and the other end of which is connected to the other end of the identity switch module.

[0005] Preferably, the identification switch is an electronic access control switch.

[0006] Preferably, the time-delay power-off relay includes: A coil, one end of which is connected to the first terminal of the time-delay power-off relay, and the other end of which is connected to the second terminal of the time-delay power-off relay; A moving contact switch, one end of which is connected to the third terminal of the time-delay power-off relay, and the other end of which is connected to the fourth terminal of the time-delay power-off relay.

[0007] Preferably, the time-delay power-off relay is a normally open relay.

[0008] Preferably, the first low-voltage power supply circuit is a KL15 circuit.

[0009] Preferably, the PDU module includes: A boost converter assembly, one end of which is connected to an external high-voltage power supply; A capacitor assembly, one end of which is connected to the other end of the boost assembly; An inverter assembly, one end of which is connected to the other end of the capacitor assembly; A rectifier assembly, wherein a first end of the rectifier assembly is connected to the other end of the inverter assembly, a second end of the rectifier assembly is connected to the positive terminal of the PDU module, and a third end of the rectifier assembly is connected to the negative terminal of the PDU module.

[0010] Preferably, the power supply control circuit further includes a second low-voltage power supply circuit, which is a KL30 circuit.

[0011] In another aspect, this utility model provides a forklift, which includes a forklift body and a power supply control circuit as described in any of the preceding claims.

[0012] Through the above technical solution, the power supply control circuit and forklift can normally receive low-voltage power. A delayed power-off relay is used to achieve delayed power-off of the low-voltage power supply circuit. After power failure, the coil of the normally open relay is energized, and the moving contact switch closes for a period of time after power failure. After the coil is de-energized, the moving contact switch opens, thus ensuring safe high-voltage power failure. Simultaneously, an identity switch module is set up, using an electronic access control switch, requiring operators to verify their identity, standardizing vehicle driving, and ensuring the safety of power supply operations. A first low-voltage power supply circuit is set up to facilitate connection with external low-voltage control systems. The KL15 circuit, as a low-voltage circuit, connects to the corresponding control lines to operate the high-voltage system, thereby ensuring delayed power failure control and achieving safe high-voltage power failure. A KL30 circuit is set up as a second low-voltage power supply circuit. The KL30 circuit can connect to external low-voltage electrical devices and receive continuous power through a battery. A PDU module is set up, using various components to achieve voltage conversion, thereby enabling real-time charging of the low-voltage battery and other low-voltage electrical devices, preventing battery depletion that could prevent the vehicle from starting, thus ensuring the reliability and safety of forklift operation. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a circuit connection diagram of a power supply control circuit for a new energy forklift according to one embodiment of the present utility model; Figure 2 This is a circuit connection diagram of the PDU module of a power supply control circuit for a new energy forklift according to one embodiment of the present invention.

[0014] Explanation of reference numerals in the attached figures Detailed Implementation

[0015] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0016] like Figure 1 The diagram shown is a circuit connection diagram of a power supply control circuit for a new energy forklift according to one embodiment of this utility model. Figure 2This is a circuit connection diagram of the internal circuit of a PDU module in a power supply control circuit for a new energy forklift according to one embodiment of this utility model. Figure 1 and 2 This utility model provides a power supply control circuit for a new energy forklift. The power supply control circuit includes a battery 1, a main switch 2, an identity switch module 2, a time-delay power-off relay 4, a first low-voltage power supply circuit 5, and a PDU module 6. Specifically, one end of the main switch 2 is connected to the positive terminal of the battery 1, one end of the identity switch module 2 is connected to the other end of the main switch 2, the first end 401 of the time-delay power-off relay is connected to the other end of the identity switch module 2, the second end 402 of the time-delay power-off relay is connected to the negative terminal of the battery 1, the third end 403 of the time-delay power-off relay is connected to the other end of the main switch 2, one end of the first low-voltage power supply branch is connected to the fourth end 404 of the time-delay power-off relay, the other end of the first low-voltage power supply circuit 5 is connected to an external low-voltage system, the positive terminal of the PDU module 6 is connected to the other end of the main switch 2, and the negative terminal of the PDU module 6 is connected to the negative terminal of the battery 1.

[0017] Through the above technical solution, the power supply control circuit and forklift can normally receive low-voltage power. At the same time, a delayed power-off relay is set to realize delayed power-off of the low-voltage power supply circuit, thereby ensuring safe power-off of the high-voltage circuit. In addition, an identity switch module is set to authorize and identify the operator, ensuring the safety of power supply operation. Furthermore, a first low-voltage power supply circuit is set up to facilitate connection with an external low-voltage control system to achieve delayed power-off. A PDU module is set up to enable real-time charging of the battery, avoiding battery depletion that could prevent the vehicle from starting, thereby ensuring the reliability and safety of forklift use.

[0018] exist Figure 1 In order to standardize the operation of operators and prevent unauthorized personnel from using the forklift, in one embodiment of this utility model, the identity switch module 2 includes a first fuse 31, a key switch 32, and an identity recognition switch 33. Specifically, one end of the first fuse 31 is connected to one end of the identity switch module 2, one end of the key switch 32 is connected to the other end of the first fuse 31, one end of the identity recognition switch 33 is connected to the other end of the key switch 32, and the other end of the identity recognition switch 33 is connected to the other end of the identity switch module 2. Through the identity recognition module, the fuse protects the circuit, the key switch 32 provides further safety control of the circuit, and the identity recognition switch 33 authorizes operators to perform standardized operations, thereby ensuring the reliability of use.

[0019] exist Figure 1In order to trace the responsibility of operators, record user information, and avoid misoperation by non-professionals, in one embodiment of this utility model, the identity recognition switch 33 can be an electronic access control switch. Only authorized personnel can use the forklift and enable power supply to the forklift.

[0020] exist Figure 1 In order to achieve delayed power outage and ensure safe power disconnection from high-voltage power sources, in one embodiment of this utility model, the delayed power outage relay 4 includes a coil 41 and a moving contact switch 42. One end of the coil 41 is connected to the first terminal of the delayed power outage relay 4, and the other end of the coil 41 is connected to the second terminal of the delayed power outage relay 4. One end of the moving contact switch 42 is connected to the third terminal of the delayed power outage relay 4, and the other end of the moving contact switch 42 is connected to the fourth terminal of the delayed power outage relay 4. This ensures that after power failure, the coil 41 remains energized to maintain the closure of the moving contact switch 42, and after the coil 41 is de-energized, the moving contact switch 42 opens. To prevent the moving contact from closing after power failure, in one embodiment of this utility model, the delayed power outage relay 4 is a normally open relay.

[0021] exist Figure 1 In order to achieve signal control of the high-voltage system and ensure that the low-voltage delayed power-off can safely disconnect the high-voltage power supply, in one embodiment of this utility model, the first low-voltage power supply circuit 5 is a KL15 circuit. The KL15 circuit can be connected to a corresponding controller, and the controller realizes the control of the high-voltage system.

[0022] exist Figure 2 In this invention, considering that the battery 1 and low-voltage electrical components consume a small current when the vehicle is in standby mode, which can easily lead to battery 1 being depleted, in one embodiment of this invention, the PDU module 6 may include a boost converter 61, a capacitor assembly 62, an inverter assembly 63, and a rectifier assembly 64. One end of the boost converter 61 is connected to an external high-voltage power supply, one end of the capacitor assembly 62 is connected to the other end of the boost converter 61, one end of the inverter assembly 63 is connected to the other end of the capacitor assembly 62, the first end 641 of the rectifier assembly is connected to the other end of the inverter assembly 63, the second end 642 of the rectifier assembly is connected to the positive terminal of the PDU module 6, and the third end 642 of the rectifier assembly is connected to the negative terminal of the PDU module 6. Through the above-mentioned component connection, the high-voltage power supply will be used to charge the battery 1 in real time, ensuring the reliability of the forklift operation.

[0023] exist Figure 1 In order to provide power to the low-voltage electrical components inside the vehicle, in one embodiment of this utility model, the power supply control circuit further includes a second low-voltage power supply circuit 7, which is a KL30 circuit. The KL30 circuit can provide continuous power supply to ensure the reliability of power supply.

[0024] In another aspect, this utility model provides a forklift, which includes a forklift body and a power supply control circuit as claimed in any of the preceding claims.

[0025] Through the above technical solution, the power supply control circuit and forklift can normally receive low-voltage power. A delayed power-off relay is used to achieve delayed power-off of the low-voltage power supply circuit. After power failure, the coil of the normally open relay is energized, and the moving contact switch closes for a period of time after power failure. After the coil loses power, the moving contact switch opens, thus ensuring safe high-voltage power failure. Simultaneously, an identity switch module is set up, using an electronic access control switch, requiring operators to verify their identity, standardizing vehicle driving, and ensuring the safety of power supply operations. A first low-voltage power supply circuit is set up to facilitate connection with external low-voltage control systems. The KL15 circuit, as a low-voltage circuit, connects to the corresponding control lines to operate the high-voltage system, thereby ensuring delayed power failure control and achieving safe high-voltage power failure. A KL30 circuit is set up as a second low-voltage power supply circuit. The KL30 circuit can connect to external low-voltage electrical devices and receive continuous power through a battery. A PDU module is set up, using various components to achieve voltage conversion, thereby enabling real-time charging of the low-voltage battery and other low-voltage electrical devices, preventing battery depletion that could prevent the vehicle from starting, thus ensuring the reliability and safety of forklift operation.

[0026] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention. It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not further describe the various possible combinations.

[0027] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A power supply control circuit for a new energy forklift, characterized in that, The power supply control circuit includes: Storage battery; A main switch, one end of which is connected to the positive terminal of the battery; An identity switch module, one end of which is connected to the other end of the main switch; A time-delay power-off relay, wherein the first end of the time-delay power-off relay is connected to the other end of the identity switch module, the second end of the time-delay power-off relay is connected to the negative terminal of the battery, and the third end of the time-delay power-off relay is connected to the other end of the main switch; A first low-voltage power supply circuit, one end of which is connected to the fourth terminal of the time-delay power-off relay, and the other end of which is connected to an external low-voltage system. The PDU module has its positive terminal connected to the other end of the main switch, and its negative terminal connected to the negative terminal of the battery.

2. The power supply control circuit according to claim 1, characterized in that, The identity switch module includes: A first fuse, one end of which is connected to one end of the identity switch module; A key switch, one end of which is connected to the other end of the first fuse; An identity recognition switch, one end of which is connected to the other end of the key switch, and the other end of which is connected to the other end of the identity switch module.

3. The power supply control circuit according to claim 2, characterized in that, The identification switch is an electronic access control switch.

4. The power supply control circuit according to claim 1, characterized in that, Delayed power-off relays include: A coil, one end of which is connected to the first terminal of the time-delay power-off relay, and the other end of which is connected to the second terminal of the time-delay power-off relay; A moving contact switch, one end of which is connected to the third terminal of the time-delay power-off relay, and the other end of which is connected to the fourth terminal of the time-delay power-off relay.

5. The power supply control circuit according to claim 4, characterized in that, The time-delay power-off relay is a normally open relay.

6. The power supply control circuit according to claim 1, characterized in that, The first low-voltage power supply circuit is the KL15 circuit.

7. The power supply control circuit according to claim 1, characterized in that, The PDU module includes: A boost converter assembly, one end of which is connected to an external high-voltage power supply; A capacitor assembly, one end of which is connected to the other end of the boost assembly; An inverter assembly, one end of which is connected to the other end of the capacitor assembly; A rectifier assembly, wherein a first end of the rectifier assembly is connected to the other end of the inverter assembly, a second end of the rectifier assembly is connected to the positive terminal of the PDU module, and a third end of the rectifier assembly is connected to the negative terminal of the PDU module.

8. The power supply control circuit according to claim 1, characterized in that, The power supply control circuit also includes a second low-voltage power supply circuit, which is a KL30 circuit.

9. A forklift, characterized in that, The forklift includes a forklift body and a power supply control circuit as described in any one of claims 1-8.

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