A battery pack monitoring system for a dump truck

Abstract

The utility model discloses a kind of dump truck battery pack monitoring systems, including temperature detection module, temperature detection module is used to detect the temperature of battery pack on dump truck, temperature detection module is electrically connected with processor, processor is electrically connected with display module;Wherein, temperature detection module includes first resistance, second resistance, third resistance, thermistor, operational amplifier, feedback resistance and DC power supply.The utility model's temperature detection module is cooperated by first resistance, second resistance, third resistance, thermistor, operational amplifier, feedback resistance and DC power supply, the voltage of thermistor two ends is amplified by operational amplifier, effectively increase the voltage value of thermistor two ends detected;The sensitivity of the voltage value of thermistor two ends detected is improved, and the sensitivity and accuracy of the detection of battery pack temperature are further improved.

Description

Technical Field

[0001] This utility model relates to the field of electric dump truck technology, specifically a dump truck battery pack monitoring system. Background Technology

[0002] As mining operations become increasingly large-scale and specialized, the requirements for vehicle transportation quality are also gradually increasing. Currently, the main transportation machinery is mining dump trucks (also known as wide-body trucks). Dump trucks have three major drawbacks: high fuel consumption, low transportation efficiency, and significant environmental impact. Fuel consumption accounts for more than 50% of the total vehicle operating cost, and high fuel consumption has become a heavy burden on the mining transportation industry. With the rapid development of electric technology, electric dump trucks, with their advantages of "high efficiency, energy saving, zero pollution, and zero emissions," are gradually becoming the preferred vehicle type in the mining transportation industry.

[0003] The battery pack is a core component of electric dump trucks. Operating the battery pack at excessively high or low temperatures can easily lead to heat dissipation or thermal runaway. Currently, most dump truck battery pack temperature sensors detect the battery pack temperature by monitoring the voltage change across a thermistor. Thermistors are commonly used temperature-sensitive elements; however, the NTC thermistor's resistance-temperature characteristic has significant non-linearity. A common practice is to connect the thermistor in series or parallel with other linear resistors to reduce this non-linearity. However, the voltage drop across the thermistor due to the linear resistors reduces the voltage across the thermistor, consequently decreasing the accuracy and sensitivity of the thermistor's temperature measurement. Utility Model Content

[0004] The purpose of this invention is to improve and innovate upon the shortcomings and problems existing in the background technology, and to provide a dump truck battery pack monitoring system.

[0005] A dump truck battery pack monitoring system includes a temperature detection module for detecting the temperature of the battery pack on the dump truck. The temperature detection module is electrically connected to a processor, and the processor is electrically connected to a display module. The temperature detection module includes a first resistor, a second resistor, a third resistor, a thermistor, an operational amplifier, a feedback resistor, and a DC power supply. The positive terminal of the DC power supply is connected to the first end of the first resistor and the positive power supply pin of the operational amplifier. The negative terminal of the DC power supply is connected to the second end of the second resistor, the second end of the thermistor, and the negative power supply pin of the operational amplifier. The second end of the first resistor is connected to the first end of the thermistor and the first end of the third resistor. The second end of the third resistor is connected to the non-inverting input pin of the operational amplifier. The inverting input pin of the operational amplifier and the first end of the second resistor are connected to the first end of the feedback resistor. The second end of the feedback resistor is connected to the output pin of the operational amplifier. The output pin of the operational amplifier is also connected to the processor.

[0006] A further embodiment is that the DC power supply includes a battery pack of the dump truck, a DC-DC step-down circuit, and a filter capacitor. The DC-DC step-down circuit is used to convert the high-voltage DC power output from the battery pack into low-voltage DC power, and the filter capacitor is connected in parallel with the DC-DC step-down circuit.

[0007] A further option is that the DC-DC step-down circuit is a Buck circuit.

[0008] A further option is that the processor is an STC series microcontroller.

[0009] A further embodiment is that the display module includes a first display screen and LED lights.

[0010] A further embodiment is that the processor is also connected to a remote terminal via a wireless communication module, and the remote terminal is electrically connected to a second display screen.

[0011] A further solution is to attach the thermistor to the corresponding module cell of the battery pack using thermally conductive adhesive.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The temperature detection module of this utility model, through the cooperation of a first resistor, a second resistor, a third resistor, a thermistor, an operational amplifier, a feedback resistor, and a DC power supply, amplifies the voltage across the thermistor through the operational amplifier, effectively increasing the detected voltage value across the thermistor; this improves the sensitivity of the detected voltage value across the thermistor, thereby improving the sensitivity and accuracy of battery pack temperature detection; furthermore, the DC power supply of this utility model uses the battery pack of the dump truck as the power input, first undergoing voltage reduction processing through a DC-DC step-down circuit, and then obtaining the voltage under the stabilization effect of the filter capacitor, thereby ensuring that the DC power supply voltage remains stable and effectively avoiding interference to the detected thermistor voltage value due to DC power supply voltage fluctuations. Attached Figure Description

[0013] Figure 1 A schematic diagram of a dump truck battery pack monitoring system provided in this embodiment of the present invention; Figure 2 The circuit diagram of the temperature detection module provided in this embodiment of the utility model is shown. Detailed Implementation

[0014] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0016] Please see Figures 1-2 This utility model provides a battery pack monitoring system for dump trucks, including a temperature detection module. The temperature detection module is used to detect the temperature of the battery pack on the dump truck. The temperature detection module is electrically connected to a processor, and the processor is electrically connected to a display module. The temperature detection module sends the detected battery pack temperature signal to the processor, and the processor displays the monitored temperature value through the display module, thereby making it easy to observe whether there is any abnormality in the temperature of the battery pack on the dump truck chassis.

[0017] Specifically, the temperature detection module includes a first resistor R1, a second resistor R2, a third resistor R3, a thermistor RT, an operational amplifier U1, a feedback resistor Uf, and a DC power supply. The positive terminal of the DC power supply is connected to the first end of the first resistor R1 and the positive power supply pin of the operational amplifier U1. Figure 2 Pin 4 of operational amplifier U1 is connected to the negative terminal of the DC power supply. The negative terminal of the DC power supply is connected to the second terminal of the second resistor R2, the second terminal of the thermistor RT, and the negative power supply pin of operational amplifier U1. The negative power supply pin of operational amplifier U1 is... Figure 2 Pin 3 of operational amplifier U1 is connected to the operational amplifier U1. The second terminal of the first resistor R1 is connected to the first terminal of the thermistor RT and the first terminal of the third resistor R3. The second terminal of the third resistor R3 is connected to the non-inverting input pin of operational amplifier U1. The inverting input pin of operational amplifier U1 is connected to the first terminal of the second resistor R2 and the first terminal of the feedback resistor Rf. The non-inverting and inverting input pins of operational amplifier U1 are respectively... Figure 2Pins 1 and 2 of operational amplifier U1 are connected. The second end of feedback resistor Rf is connected to the output pin of operational amplifier U1, and the output pin of operational amplifier U1 is also connected to the processor. In this embodiment, the processor is an STC series microcontroller. Since the voltages and currents at the non-inverting and inverting inputs of operational amplifier U1 are equal and zero, the voltage at the first terminal of the thermistor RT is equal to the voltages at the non-inverting and inverting inputs. Simultaneously, the currents flowing through the second resistor R2 and feedback resistor Rf are equal. Therefore, the amplification factor of the voltage at the output of operational amplifier U1 relative to the voltage at the thermistor RT can be calculated. Thus, operational amplifier U1 amplifies the voltage at the thermistor RT, effectively increasing the detected voltage across the thermistor RT; this improves the sensitivity of the detected voltage at the thermistor RT, thereby improving the sensitivity and accuracy of battery pack temperature detection. It should be noted that in the prior art, the STC series microcontrollers can calculate the temperature value detected by the thermistor RT based on the voltage value at the output of the operational amplifier U1. This application does not improve or innovate this technical means.

[0018] Optionally, the thermistor RT is attached to the corresponding module cell of the battery pack using thermally conductive adhesive.

[0019] Optionally, the DC power supply includes a dump truck's battery pack, a DC-DC step-down circuit, and a filter capacitor. The DC-DC step-down circuit converts the high-voltage DC output from the battery pack into low-voltage DC. The filter capacitor is connected in parallel with the DC-DC step-down circuit. Preferably, the DC-DC step-down circuit is a Buck circuit, a step-down DC-DC converter that achieves DC-DC voltage conversion through the periodic switching of switching devices. Since the DC power supply uses the dump truck's battery pack as the power input, it first undergoes voltage reduction processing by the DC-DC step-down circuit and then is stabilized by the filter capacitor. This ensures that the DC power supply voltage remains stable and effectively avoids interference with the detected thermistor voltage value caused by DC power supply voltage fluctuations.

[0020] In this embodiment, the display module includes a first display screen and LEDs. The first display screen can display the detected temperature value of the battery pack; when the microcontroller determines that the detected temperature value of the battery pack is higher than a preset threshold, the microcontroller can control the LEDs to light up as a warning; for example, when the microcontroller determines that the detected temperature value of the battery pack is higher than the preset threshold, the pin connected to the microcontroller and the LEDs can output a high-level signal.

[0021] The processor is also connected to a remote terminal via a wireless communication module, and the remote terminal is electrically connected to a second display screen. The wireless communication module can be a wireless data transmission module, in which the microcontroller sends the detected temperature signal to the remote terminal, making it convenient for staff to remotely detect whether the temperature value of the battery pack is abnormal.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model.

[0023] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0024] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Although embodiments of this utility model have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack monitoring system for dump trucks, characterized in that: The system includes a temperature detection module for detecting the temperature of the battery pack on the dump truck. The temperature detection module is electrically connected to a processor, and the processor is electrically connected to a display module. The temperature detection module includes a first resistor, a second resistor, a third resistor, a thermistor, an operational amplifier, a feedback resistor, and a DC power supply. The positive terminal of the DC power supply is connected to the first end of the first resistor and the positive power supply pin of the operational amplifier. The negative terminal of the DC power supply is connected to the second end of the second resistor, the second end of the thermistor, and the negative power supply pin of the operational amplifier. The second end of the first resistor is connected to the first end of the thermistor and the first end of the third resistor. The second end of the third resistor is connected to the non-inverting input pin of the operational amplifier. The inverting input pin of the operational amplifier and the first end of the second resistor are connected to the first end of the feedback resistor. The second end of the feedback resistor is connected to the output pin of the operational amplifier. The output pin of the operational amplifier is also connected to the processor.

2. The dump truck battery pack monitoring system according to claim 1, characterized in that: The DC power supply includes a battery pack for the dump truck, a DC-DC step-down circuit, and a filter capacitor. The DC-DC step-down circuit is used to convert the high-voltage DC power output from the battery pack into low-voltage DC power. The filter capacitor is connected in parallel with the DC-DC step-down circuit.

3. The dump truck battery pack monitoring system according to claim 2, characterized in that: The DC-DC step-down circuit is a Buck circuit.

4. The dump truck battery pack monitoring system according to claim 1, characterized in that: The processor is an STC series microcontroller.

5. The dump truck battery pack monitoring system according to claim 1, characterized in that: The display module includes a first display screen and LED lights.

6. The dump truck battery pack monitoring system according to claim 1, characterized in that: The processor is also connected to a remote terminal via a wireless communication module, and the remote terminal is electrically connected to a second display screen.

7. The dump truck battery pack monitoring system according to claim 1, characterized in that: The thermistor is attached to the corresponding module cell of the battery pack using thermally conductive adhesive.

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