A 24V battery power loss prevention circuit

Abstract

The utility model relates to a 24V battery anti -depletion circuit contains whole vehicle controller VCU and the 24V battery of power supply for whole vehicle controller VCU, its characterized in that: still contains contactor one and contactor two, the anode of 24V battery is connected to the incoming line end of contactor one controlled end and the incoming line of key switch, and the outgoing line end of contactor one controlled end is connected to the incoming line end of contactor two controlled end and the power supply end of whole vehicle controller VCU, and the outgoing line end of contactor two is connected to the power equipment behind. The utility model relates to a 24V battery anti -depletion circuit, which can effectively prevent the 24V battery from being depleted.

Description

Technical Field

[0001] This utility model relates to a circuit for preventing power loss, and more particularly to a circuit used in electric forklifts to prevent the 24V battery used for starting from being depleted, belonging to the field of electric forklift technology. Background Technology

[0002] Currently, with the rapid development of new energy technologies across various industries and the need for environmental protection, electric forklifts are widely used. After use, improper operation or prolonged storage can cause the 24V battery to become depleted, preventing the forklift from starting next time. Especially when the 24V battery is deeply discharged, the damage is irreversible, significantly reducing battery lifespan and increasing maintenance and operating costs for businesses. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a 24V battery anti-discharge circuit, which can effectively prevent the 24V battery from being discharged.

[0004] The purpose of this utility model is achieved as follows: A 24V battery anti-discharge circuit includes a vehicle controller (VCU) and a 24V battery that powers the VCU. It also includes a contactor 1 and a contactor 2. The positive terminal of the 24V battery is connected to the input terminal of the controlled end of the contactor 1 and the input terminal of the key switch. The output terminal of the controlled end of the contactor 1 is connected to the input terminal of the controlled end of the contactor 2 and the power supply terminal of the VCU. The output terminal of the contactor 2 is connected to the electrical equipment at the rear.

[0005] The negative terminal of the 24V battery is connected to the vehicle frame.

[0006] The vehicle control unit (VCU) is connected to the voltage monitoring terminal of the 24V battery and the control terminal of the high-voltage box. The power input terminal of the high-voltage box is connected to the charging port. The high-voltage box is connected to the high-voltage battery and the DC converter via the CAN bus. The output terminal of the DC converter is connected to the charging terminal of the 24V battery.

[0007] Compared with the prior art, the beneficial effects of this utility model are: This invention introduces a second contactor and adjusts the wiring to ensure that when the key is not turned on, there are no directly connected electrical components at the rear of the 24V battery, thus preventing power loss. Furthermore, when the key is turned on, the vehicle control unit (VCU) monitors the 24V battery voltage in real time. If the 24V battery voltage is detected to be too low, the high-voltage battery is activated, charging the 24V battery through the high-voltage box and DC converter. Even when the high-voltage battery is charging or discharging to power the forklift, the charging voltage continues to flow through the high-voltage box and DC converter to charge the 24V battery. Therefore, after these comprehensive modifications, the electric forklift will not suffer power loss due to prolonged inactivity, nor will the 24V battery be depleted if the user forgets to turn off the key. Attached Figure Description

[0008] Figure 1 This is a circuit diagram of a 24V battery anti-discharge circuit according to the present invention.

[0009] Figure 2 This is the circuit diagram for a standard electric forklift. Detailed Implementation

[0010] See Figure 1 This utility model relates to a 24V battery anti-discharge circuit, which is an upgrade of the original electric forklift. The original electric forklift includes a high-voltage box and a 24V battery. The vehicle control unit (VCU) controls the high-voltage battery to supply power to the forklift and drive it to work. The key switch controls the 24V battery to supply power to the electrical equipment. During charging, the current connected to the charging port is stepped up to high voltage by the high-voltage box and then charges the high-voltage battery. This example improves upon it as follows: Two wide-voltage input contactors (Contactor 1 and Contactor 2) are installed. The positive terminal of the 24V battery is connected to the input terminal of the controlled end of Contactor 1 and the input terminal of the key switch. The negative terminal of the 24V battery is connected to the vehicle frame. The output terminal of the controlled end of Contactor 1 is connected to the input terminal of the controlled end of Contactor 2 and the power supply terminal of the vehicle controller. The output terminal of Contactor 2 is connected to the electrical equipment at the rear.

[0011] The on / off state of the coil at the control terminal of contactor one is controlled by the key switch, while the coil at the control terminal of contactor two is controlled by the vehicle control unit (VCU).

[0012] Meanwhile, the vehicle controller (VCU) is connected to the voltage monitoring terminal of the 24V battery and the control terminal of the high-voltage box. The power input terminal of the high-voltage box is connected to the charging port. The high-voltage box is connected to the high-voltage battery and the DC converter via the CAN bus. The output terminal of the DC converter is connected to the charging terminal of the 24V battery.

[0013] The working principle of this utility model is as follows: (1) When the key switch is turned off, the coil of the control terminal of the key switch controls the contactor one to lose power, thereby making the controlled terminal of the contactor one open circuit. At this time, the vehicle controller VCU and the contactor two are both open circuit. Therefore, the power supply of the 24V battery is only connected to the input terminal of the controlled terminal of the contactor one and the input terminal of the key switch and is not connected to any power-consuming components. Therefore, the 24V battery will not discharge, thus preventing the occurrence of power depletion.

[0014] (2) When the key switch is turned on, the key switch controls the coil of the control terminal of contactor one to be energized, so that the controlled terminal of contactor one is in the closed state. At this time, the vehicle controller VCU and the controlled terminal of contactor two are both energized. After the VCU monitors the vehicle status and it is normal, it controls the coil of the control terminal of contactor two to be energized. At this time, contactor two can supply power to the downstream electrical equipment, and the vehicle controller VCU is also in the working state, monitoring the voltage level of the 24V battery and controlling the high voltage box in real time.

[0015] (2.1) When the vehicle is in the ready state (the high-voltage battery is not working), the vehicle controller VCU monitors the voltage level of the 24V battery in real time. When the voltage level of the 24V battery is lower than the preset voltage value, the vehicle controller VCU starts the high-voltage battery through the CAN line. The high-voltage battery charges the 24V battery through the high-voltage box and DC converter.

[0016] (2.2) When the vehicle is in operation (the high-voltage battery starts working), the high-voltage electricity continuously charges the 24V battery through the high-voltage box and DC converter to ensure that the 24V battery is fully charged when the vehicle is stopped.

[0017] (3) When the vehicle is in the charging state (i.e., charging the high-voltage battery through the charging port), the high-voltage electricity introduced into the high-voltage box through the charging port is converted to charge the high-voltage battery, and at the same time, it also charges the 24V storage battery through the high-voltage box and DC converter.

[0018] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A 24V battery anti-discharge circuit, comprising a vehicle controller (VCU) and a 24V battery supplying power to the VCU, characterized in that: It also includes contactor one and contactor two. The positive terminal of the 24V battery is connected to the input terminal of the controlled end of contactor one and the input terminal of the key switch. The output terminal of the controlled end of contactor one is connected to the input terminal of the controlled end of contactor two and the power supply terminal of the vehicle controller (VCU). The output terminal of contactor two is connected to the electrical equipment at the rear.

2. The 24V battery anti-discharge circuit according to claim 1, characterized in that: The negative terminal of the 24V battery is connected to the vehicle frame.

3. The 24V battery anti-discharge circuit according to claim 1, characterized in that: The vehicle control unit (VCU) is connected to the voltage monitoring terminal of the 24V battery and the control terminal of the high-voltage box. The power input terminal of the high-voltage box is connected to the charging port. The high-voltage box is connected to the high-voltage battery and the DC converter via the CAN bus. The output terminal of the DC converter is connected to the charging terminal of the 24V battery.

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