Electric control system and control method of tow line loader

Abstract

The invention discloses an electric control system and a control method of a tow line loader, and belongs to the technical field of electric loaders. A power supply interface module; a rectifier module; a power distribution and electric control module, a gearbox and drive axle module and a pump and hydraulic module; a battery module; a driving motor module; a working motor module; 24-hour uninterrupted operation can be achieved, the tow line loader can be directly connected with the mains supply in the working process, complete dependence on the electric quantity of a battery is avoided, 24-hour continuous operation can be achieved, the working efficiency is greatly improved, and the customer requirement with the strict requirement for the operation time is met. Flexible transition operation: when a working site is changed, the loading machine can be powered by the battery module, transition operation without relying on the mains supply is realized, the loading machine can be quickly transferred among different sites due to the flexibility, the time loss caused by site transition is reduced, and the use convenience and the operation adaptability of the equipment are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric loaders, and in particular, relates to an electric control system and a control method for a tow line loader. Background Art

[0002] With increasingly stringent environmental protection requirements and the continued rise in international oil prices, electric loaders are becoming more and more widely used in the market.

[0003] The mainstream pure electric loader technology in the existing technology has many limitations: on the one hand, in order to meet the long-term and high-intensity operation requirements of the loader, the power battery it is configured with has a large capacity, which makes the battery cost high, and thus leads to a relatively high cost of the entire machine; on the other hand, when the battery is exhausted, it needs to be charged with the help of a charging pile, and the charging time is long. During this period, the loader cannot operate normally, which makes it difficult to meet the needs of some customers for 24-hour uninterrupted work, affecting loading efficiency. Summary of the invention

[0004] Problem to be solved

[0005] In view of the problems raised in the prior art, the present invention provides an electronic control system and a control method for a tow line loader.

[0006] Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A tow line loader electronic control system, comprising:

[0009] Power supply module: used to connect to the mains and provide power;

[0010] Power supply interface module: connected to the power supply module through a high-voltage wire harness, used to receive power from the power supply module;

[0011] Rectifier module: connected to the power supply interface module, and used to convert the high voltage voltage at the output end of the power supply interface module into a controllable rectified voltage;

[0012] Power distribution and electronic control modules, gearbox and drive axle modules, and pump and hydraulic modules;

[0013] The power distribution and electronic control module is connected to the gearbox and drive axle module, and the power distribution and electronic control module is connected to the rectifier module;

[0014] Battery module: connected between the rectifier module and the power distribution and electronic control module, the battery module is used to provide power to the loader when the line is towing, and to supplement the power when the battery is low;

[0015] Drive motor module: connected to the power distribution and electronic control module, and used to drive the vehicle forward and backward through the gearbox and drive axle module;

[0016] Working motor module: connected to the power distribution and electric control module, and the working electrode module is used to realize loading operation through the pump and hydraulic module;

[0017] The working motor module is connected to the pump and the hydraulic module.

[0018] Preferably, the power distribution and electronic control module includes a power distribution module and an electronic control module. The power distribution module is used to supply power to the vehicle air conditioner, heating PTC, and battery water heating PTC. The electronic control module is used to control the speed and power of the drive motor module and the working motor module.

[0019] Preferably, the battery module includes a battery, a high-voltage relay and a control module.

[0020] Preferably, when the SOC of the battery module is lower than the preset value SOC1, the rectifier module outputs according to the current voltage and the maximum allowable charging current emitted by the battery module. The output current of the rectifier module is the sum of the allowable charging current of the battery and the actual working current of the electronic control module, so as to realize synchronous charging of the battery by the tow line loader while working.

[0021] Furthermore, when the SOC of the battery module is higher than a preset value SOC1, the battery module cuts off the internal high-voltage relay, the rectifier module only outputs current to the electronic control module, and stops charging the battery module.

[0022] Furthermore, when transferring, the high-voltage power supply harness on the power supply interface module is disconnected, the loader is powered by the battery module, the electronic control module controls the drive motor module and the working motor module, and the loader transfers between various work sites.

[0023] A control method for an electronic control system of a tow line loader comprises the following steps:

[0024] S1. When the SOC of the battery module is lower than the preset value SOC1, the battery module sends out the current voltage and the maximum allowable charging current, and the rectifier module outputs the sum of the allowable charging current of the battery module and the actual working current of the electronic control module, so that the tow line loader can charge the battery module at the same time when working;

[0025] S2: When the SOC of the battery module is higher than the preset value SOC1, the battery module cuts off the internal high-voltage relay, the rectifier module only outputs current to the electronic control system, and stops charging the battery;

[0026] S3. When transferring, unplug the high-voltage power supply harness of the power supply interface module, the loader is powered by the battery module, and the drive motor module and the working motor module are controlled by the electronic control module to realize the transfer of the loader between different work sites.

[0027] Beneficial Effects

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The present invention can realize 24-hour uninterrupted operation: the tow line loader can be directly connected to the mains during operation, getting rid of the complete dependence on battery power, and can realize 24-hour continuous operation, greatly improving work efficiency and meeting the needs of customers who have strict requirements on operation time.

[0030] Reduce the cost of the whole machine: Compared with the traditional pure electric loader, the present invention adopts a small-capacity battery in conjunction with the mains tow line to work, which reduces the demand for large-capacity power batteries and reduces battery costs. At the same time, there is no need to configure a high-power charging pile, which further reduces the overall cost of the equipment and improves the market competitiveness of the product.

[0031] Flexible transfer operation: When changing the work site, the loader can rely on the battery module for power supply to achieve transfer operation without relying on mains power. This flexibility enables the loader to be quickly transferred between different sites, reducing the time loss caused by site conversion and improving the equipment's ease of use and operational adaptability.

[0032] Extend battery life: By precisely controlling the battery charge and discharge process, overcharging and over-discharging of the battery can be avoided. When the battery power is low, the battery can be recharged in time, and charging can be stopped when the battery power is sufficient. This effectively extends the battery life and reduces the maintenance cost of the equipment and the frequency of battery replacement.

[0033] Energy saving and environmental protection: The city electricity is used as the main power source first, which reduces the consumption of traditional fuel and reduces tail gas emissions, complying with environmental protection policy requirements. At the same time, reasonable power distribution and motor control strategies improve energy utilization efficiency, further reflecting the advantages of energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the embodiments or exemplary descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other drawings can be obtained according to the drawings without paying creative work.

[0035] Figure 1 It is a schematic diagram of the system module of the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0038] Example 1

[0039] like Figure 1 As shown, an electronic control system for a tow line loader comprises:

[0040] Power supply module: Select professional power supply equipment that is compatible with 380V AC power and connect it to the power supply interface module through a high-voltage cable that meets safety standards; the power supply module has overvoltage and undervoltage protection functions, which can effectively prevent damage to the system caused by AC voltage fluctuations; when the AC voltage is higher than 400V or lower than 360V, the power supply module automatically cuts off the output to protect the safety of subsequent modules.

[0041] Power supply interface module: It uses sturdy and durable high-voltage connectors to ensure stable and reliable connection with the power supply module; the current detection and short-circuit protection circuits are integrated inside the interface to monitor the input current in real time. Once a short circuit is detected, the circuit is quickly cut off to avoid the expansion of the fault; when an unexpected short circuit occurs and the current is instantly too large, the short-circuit protection circuit can respond within a few milliseconds and cut off the power supply.

[0042] Rectifier module: using advanced thyristor rectification technology, the high-voltage AC output of the power supply interface module is converted into a controllable DC voltage; when the SOC of the battery module is lower than the preset value SOC1 (such as set to 30%), the rectifier module receives the current voltage and maximum allowable charging current signal from the battery module; assuming that the battery's allowable charging current is 60A and the actual working current of the electronic control module is 40A, the rectifier module will output 100A current, so that the tow line loader can work synchronously with the battery charging; when the SOC of the battery module is higher than the preset value SOC1, the battery module controls the internal high-voltage relay to cut off the charging circuit, and at this time the rectifier module only outputs the current required for work to the electronic control module.

[0043] Power distribution and electronic control module: The power distribution module distributes power to the vehicle air conditioner, heating PTC, battery water heating PTC and other equipment through multiple relays and fuses. For example, in cold weather, the power distribution module gives priority to the power supply of heating PTC and battery water heating PTC to ensure the normal operation of the equipment.

[0044] The electronic control module is based on a high-performance microprocessor and communicates with the drive motor module and the working motor module through the CAN bus. When the loader is loading, the electronic control module adjusts the speed and power of the working motor module in real time according to the operation situation; during driving, the speed of the drive motor module is accurately controlled to achieve smooth forward and backward movement of the vehicle.

[0045] Gearbox and drive axle module: The gearbox adopts a planetary gear structure and has a variety of transmission ratios. It can automatically switch the appropriate transmission ratio according to the output torque and speed of the drive motor module; the drive axle efficiently transmits the power output of the gearbox to the wheels to drive the vehicle.

[0046] For example, when climbing a hill with a heavy load, the gearbox switches to a low-speed, high-torque transmission ratio to ensure that the vehicle has sufficient power; when driving on a flat road, it switches to a high-speed transmission ratio to increase driving speed and efficiency.

[0047] Pump and hydraulic module: The working motor module drives the hydraulic pump, which pressurizes the hydraulic oil and delivers it to various hydraulic actuators, such as hydraulic cylinders and hydraulic motors. During loading operations, the hydraulic cylinder is controlled to realize the lifting and flipping of the bucket. The hydraulic motor is controlled to drive the conveyor belt and other devices to complete the loading, unloading and transportation of materials.

[0048] For example, when loading and unloading sand and gravel, the hydraulic system is controlled to enable the bucket to accurately grab and unload materials.

[0049] Battery module: It uses lithium iron phosphate battery pack, which has the advantages of high energy density and long life. The high-voltage relay and control module in the battery module are responsible for managing the charging and discharging process of the battery. When the battery SOC is lower than the preset value SOC1, the control module sends a charging request and related parameters to the rectifier module. When the battery SOC is higher than the preset value SOC1, the control module controls the high-voltage relay to cut off the charging circuit to protect the battery safety. When transferring, the battery module provides power for the loader to ensure that the equipment can be flexibly moved between different work sites.

[0050] Drive motor module and working motor module: Both use permanent magnet synchronous motors, which have the characteristics of high efficiency and high power density. The drive motor module drives the vehicle through the gearbox and drive axle module, and the working motor module realizes loading operations through the pump and hydraulic module; in different operating scenarios, the electronic control module accurately controls the speed and power of the motor according to actual needs, improving operating efficiency and energy utilization.

[0051] For example, when operating under light load, reduce the motor power to reduce energy consumption; when operating under heavy load, increase the motor power to ensure smooth operation.

[0052] A control method for an electronic control system of a tow line loader comprises the following steps:

[0053] S1. When the SOC of the battery module is lower than the preset value SOC1, the battery module sends out the current voltage and the maximum allowable charging current, and the rectifier module outputs the sum of the allowable charging current of the battery module and the actual working current of the electronic control module, so that the tow line loader can charge the battery module at the same time when working;

[0054] S2: When the SOC of the battery module is higher than the preset value SOC1, the battery module cuts off the internal high-voltage relay, the rectifier module only outputs current to the electronic control system, and stops charging the battery;

[0055] S3. When transferring, unplug the high-voltage power supply harness of the power supply interface module, the loader is powered by the battery module, and the drive motor module and the working motor module are controlled by the electronic control module to realize the transfer of the loader between different work sites.

[0056] The electronic control system in this application has the following beneficial effects during actual operation and use:

[0057] Capable of 24-hour uninterrupted operation: The tow line loader can be directly connected to the mains during operation, getting rid of the complete dependence on battery power. It can achieve 24-hour continuous operation, greatly improving work efficiency and meeting the needs of customers who have strict requirements on operating time.

[0058] Reduce the cost of the whole machine: Compared with the traditional pure electric loader, the present invention adopts a small-capacity battery in conjunction with the mains tow line to work, which reduces the demand for large-capacity power batteries and reduces battery costs. At the same time, there is no need to configure a high-power charging pile, which further reduces the overall cost of the equipment and improves the market competitiveness of the product.

[0059] Flexible transfer operation: When changing the work site, the loader can rely on the battery module for power supply to achieve transfer operation without relying on mains power. This flexibility enables the loader to be quickly transferred between different sites, reducing the time loss caused by site conversion and improving the equipment's ease of use and operational adaptability.

[0060] Extend battery life: By precisely controlling the battery charge and discharge process, overcharging and over-discharging of the battery can be avoided. When the battery power is low, the battery can be recharged in time, and charging can be stopped when the battery power is sufficient. This effectively extends the battery life and reduces the maintenance cost of the equipment and the frequency of battery replacement.

[0061] Energy saving and environmental protection: The city electricity is used as the main power source first, which reduces the consumption of traditional fuel and reduces tail gas emissions, complying with environmental protection policy requirements. At the same time, reasonable power distribution and motor control strategies improve energy utilization efficiency, further reflecting the advantages of energy saving and environmental protection.

[0062] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. An electronic control system for a tow line loader, characterized in that: include: Power supply module: used to connect to the mains and provide power; Power supply interface module: connected to the power supply module through a high-voltage wire harness, used to receive power from the power supply module; Rectifier module: connected to the power supply interface module, and used to convert the high voltage voltage at the output end of the power supply interface module into a controllable rectified voltage; Power distribution and electronic control modules, gearbox and drive axle modules, and pump and hydraulic modules; The power distribution and electronic control module is connected to the gearbox and drive axle module, and the power distribution and electronic control module is connected to the rectifier module; Battery module: connected between the rectifier module and the power distribution and electronic control module, the battery module is used to provide power to the loader when the line is towing, and to supplement the power when the battery is low; Drive motor module: connected to the power distribution and electronic control module, and used to drive the vehicle forward and backward through the gearbox and drive axle module; Working motor module: connected to the power distribution and electric control module, and the working electrode module is used to realize loading operation through the pump and hydraulic module; The working motor module is connected to the pump and the hydraulic module.

2. The electronic control system of a tow line loader according to claim 1, characterized in that: The power distribution and electronic control module includes a power distribution module and an electronic control module. The power distribution module is used to supply power to the vehicle air conditioner, heating PTC, and battery water heating PTC. The electronic control module is used to control the speed and power of the drive motor module and the working motor module.

3. The electronic control system of a tow line loader according to claim 1, characterized in that: The battery module includes a battery, a high voltage relay and a control module.

4. The electronic control system of a tow line loader according to claim 1, characterized in that: When the SOC of the battery module is lower than the preset value SOC1, the rectifier module outputs according to the current voltage and the maximum allowable charging current emitted by the battery module. The output current of the rectifier module is the sum of the allowable charging current of the battery and the actual working current of the electronic control module, so as to realize synchronous charging of the battery when the tow line loader is working.

5. The electronic control system of a tow line loader according to claim 4, characterized in that: When the SOC of the battery module is higher than the preset value SOC1, the battery module cuts off the internal high-voltage relay, the rectifier module only outputs current to the electronic control module, and stops charging the battery module.

6. The electronic control system of a tow line loader according to claim 1, characterized in that: When transferring, disconnect the high-voltage power supply harness on the power supply interface module, the loader is powered by the battery module, the electronic control module controls the drive motor module and the working motor module, and the loader transfers between various work sites.

7. A control method for an electronic control system of a tow line loader according to claim 5, characterized in that: The following steps are included: S1. When the SOC of the battery module is lower than the preset value SOC1, the battery module sends out the current voltage and the maximum allowable charging current, and the rectifier module outputs the sum of the allowable charging current of the battery module and the actual working current of the electronic control module, so that the tow line loader can charge the battery module at the same time when working; S2: When the SOC of the battery module is higher than the preset value SOC1, the battery module cuts off the internal high-voltage relay, the rectifier module only outputs current to the electronic control system, and stops charging the battery; S3. When transferring, unplug the high-voltage power supply harness of the power supply interface module, the loader is powered by the battery module, and the drive motor module and the working motor module are controlled by the electronic control module to realize the transfer of the loader between different work sites.

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