Electric vehicle motor preheating device

Abstract

The utility model relates to a preheating device for a motor of an electric vehicle. The preheating device comprises an electric lock, a controller, a motor and a temperature sensor, the electric lock is electrically connected with the controller and used for controlling starting and stopping of the controller. The temperature sensor is arranged on the motor and used for monitoring the real-time temperature of the motor and transmitting the monitored motor temperature to the controller. The controller is used for transmitting an operation instruction to the motor and driving and controlling the motor to operate; a PCB (Printed Circuit Board) and an MCU (Microprogrammed Control Unit) micro-control chip are arranged in The MCU micro-control chip is used for receiving and processing monitoring data transmitted by the temperature sensor and transmitting an operation instruction to the motor. By arranging the temperature sensor at the coil of the motor, the temperature of the motor can be monitored in real time. The MCU micro-control chip is provided with a low-temperature threshold value and a high-temperature threshold value, and by means of the operation mode, the motor of the electric vehicle can reach the driving state in advance before the vehicle runs, so that the situation that the motor consumes a large amount of electricity at a high speed due to vehicle starting is avoided, and battery damage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle motor control, in particular to a preheating device for an electric vehicle motor. Background Technique

[0002] As a green means of transportation, electric vehicles have brought great convenience to people's production and life and have been widely used in short and long-distance transportation fields such as families, urban and rural areas, factories, and sanitation. At present, the battery technology of electric vehicles is still one of the important problems restricting the further popularization and application of electric vehicles. While researching and innovating battery technology, how to effectively protect the use safety of batteries and extend the service life of batteries has also become a popular research topic.

[0003] Since in a low-temperature environment, the lubricating oil inside the motor will become more viscous, the efficiency of the motor will decrease, and even the components of the motor will be damaged. Therefore, in order to ensure the normal operation of electric vehicles in a low-temperature environment, it is necessary to heat the motor. Through the preheating treatment of the motor, the temperature inside the motor can be increased, so that when the vehicle starts and runs, a large amount of instantaneous discharge of the battery can be avoided, thereby achieving the purpose of protecting the battery and extending the service life of the battery. Content of the Utility Model

[0004] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a preheating device for an electric vehicle motor.

[0005] A preheating device for an electric vehicle motor, characterized in that it includes an electric lock, a controller, a motor, and a temperature sensor;

[0006] The electric lock is electrically connected to the controller and is used to control the start and stop of the controller; the temperature sensor is arranged on the motor and is electrically connected to the motor and the controller respectively, and is used to monitor the real-time temperature of the motor and transmit the monitored motor temperature to the controller; the controller is electrically connected to the motor and is used to transmit an operation instruction to the motor to drive and control the operation of the motor; a PCB circuit board is arranged inside the controller, and an MCU micro-control chip fixedly installed on the PCB circuit board; the MCU micro-control chip is used to receive and process the monitoring data transmitted by the temperature sensor and transmit an operation instruction to the motor.

[0007] Further, the motor preheating device further includes an RS485 circuit and a display instrument; the RS485 circuit is fixedly arranged on the PCB circuit board and is electrically connected to the MCU micro-control chip and the display instrument, and is used to complete the communication operation between the controller and the display instrument; the display instrument is used to receive and display the motor monitoring temperature transmitted by the MCU micro-control chip.

[0008] Further, the temperature sensor is disposed at the coil of the motor.

[0009] Further, the operation instructions transmitted by the MCU microcontroller chip to the motor include motor preheating, and the motor preheating is that a current continuously passes through the motor coil.

[0010] Further, the operation instructions transmitted by the MCU microcontroller chip to the motor include stopping motor preheating, and the stopping of motor preheating is that the current stops passing through the motor coil.

[0011] Further, the MCU microcontroller chip is an LKS32MC single-chip microcomputer, and the temperature sensor is an MF58-103F3470FB temperature sensor.

[0012] In the motor preheating device described in the present utility model, by disposing a temperature sensor at the coil of the motor, the temperature of the motor can be monitored in real time. The temperature sensor is electrically connected to the MCU microcontroller chip disposed inside the controller, and can transmit the monitored motor temperature to the MCU microcontroller chip in real time.

[0013] The MCU microcontroller chip is programmed with a temperature control program, and a low temperature threshold and a high temperature threshold are further set. When the motor temperature triggers the low temperature threshold, the MCU microcontroller chip controls the current to pass through the motor coil, and the motor performs preheating; when the motor temperature triggers the high temperature threshold, the MCU microcontroller chip disconnects the current from passing through the motor coil. Through this operation mode, before the vehicle travels, the motor of the electric vehicle can reach the driving state in advance, thereby avoiding a large amount of electricity consumption of the motor caused by the vehicle starting suddenly, and avoiding battery damage.

[0014] The motor preheating device described in the present utility model is further provided with a display instrument, which can accurately display the motor temperature in real time. The driver can make an accurate judgment on the motor preheating according to the objective driving environment, which is more applicable and operable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : Schematic diagram of the overall structure of the motor preheating device in an exemplary embodiment.

[0016] 1 - Electric lock;

[0017] 2 - Controller, 201 - PCB circuit board, 202 - MCU microcontroller chip, 203 - RS485 circuit;

[0018] 3 - Motor;

[0019] 4 - Temperature sensor;

[0020] 5 - Display instrument. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that:

[0022] 1. Certain terms are used in the description and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. The description and claims of this specification do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of components as the criterion for distinction.

[0023] 2. Unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0024] 3. Unless otherwise defined, the technical terms or scientific terms used in this disclosure should have the ordinary meaning understood by those of ordinary skill in the art to which this disclosure belongs. The "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components.

[0025] The present utility model will be described in detail below by way of examples with reference to the accompanying drawings.

[0026] As shown in the attached Figure 1 figures, this embodiment records a preheating device for an electric vehicle motor, which includes an electric lock 1, a controller 2, a motor 3, and a temperature sensor 4.

[0027] The electric lock 1 is arranged on the vehicle body of the electric vehicle, for example, generally arranged near the handle of the tram, and the driver controls the start and stop of the electric lock 1 by turning the key.

[0028] The electric lock 1 is electrically connected to the controller 2 of the electric vehicle through a wire, and is used to synchronously control the start and stop of the controller 2 of the electric vehicle.

[0029] The temperature sensor 4 is arranged at the coil of the motor 3 and is electrically connected to the motor 3 and the controller 2 respectively, and is used to transmit the monitored temperature of the motor 3 to the controller 2 in real time.

[0030] Inside the controller 2, there is a PCB circuit board 201, the PCB circuit board 201 is fixedly installed with an MCU micro control chip 202, and the PCB circuit board 201 is also provided with other electronic components for the controller 2 of the electric vehicle.

[0031] The MCU microcontroller chip 202 is used to receive and process the monitoring data transmitted by the temperature sensor 4, and transmit operation instructions to the motor 3 based on the processed temperature data, controlling the motor 3 to complete operation instructions including but not limited to preheating, starting, shutting down, etc.

[0032] To obtain better operation effects, the MCU microcontroller chip 202 described in this embodiment can adopt the LKS32MC single-chip microcomputer, and the temperature sensor 4 can adopt the MF58 - 103F3470FB temperature sensor; and a preset control algorithm, such as the PID algorithm, is written into the LKS32MC single-chip microcomputer, and the KEIL5 software is written in the C language to realize the real-time temperature regulation function of the PID control algorithm, so as to achieve accurate monitoring and regulation of the temperature.

[0033] Specifically: The MCU microcontroller chip 202 is burned with a temperature control operation program, and at least two temperature thresholds, namely the first temperature threshold and the second temperature threshold, are set in the temperature control operation program.

[0034] Among them,

[0035] The first temperature threshold is a low temperature, such as -10°C. When the monitored temperature transmitted by the temperature sensor 4 is lower than this first temperature threshold, the MCU microcontroller chip 202 outputs a motor preheating operation instruction, the current passes through the motor coil, and the coil continuously generates heat to complete the motor preheating;

[0036] The second temperature threshold is set as a high temperature, such as 10°C. When the monitored temperature transmitted in real time by the temperature sensor 4 is higher than this second temperature threshold, the MCU microcontroller chip 202 stops outputting the motor preheating operation instruction, the current stops passing through the motor coil, and the motor 3 stops the preheating operation.

[0037] As a preference:

[0038] An RS485 circuit 203 is also fixedly arranged on the PCB circuit board 201, and a display instrument 5 is also arranged in the motor preheating device.

[0039] The RS485 circuit 203 is electrically connected to the MCU microcontroller chip 202 and the display instrument 5 respectively, and is used to transmit the temperature data of the motor 3 received by the MCU microcontroller chip 202 to the display instrument 5 in real time; the display instrument 5 is used to receive and display the received temperature data.

[0040] The operation principle and / or operation process of the motor preheating device described in this embodiment are briefly described below.

[0041] The driver uses the car key to turn the electric lock 1 for the first time, the electric vehicle enters the ON gear, and the whole vehicle circuit is powered on;

[0042] The temperature sensor 4 operates and transmits the monitored motor temperature to the MCU microcontroller chip 202 of the controller 2 in real time;

[0043] The RS485 circuit 203 communicates with the display instrument 5 in real time, and the display instrument 5 displays the real-time temperature of the motor 3;

[0044] When the motor temperature triggers the first temperature threshold, the MCU microcontroller chip 202 transmits a preheating operation instruction to the motor 3 through the controller port, that is, controls the coil of the motor 3 to load current, and the motor 3 starts the heating operation;

[0045] When the motor temperature triggers the second temperature threshold, the MCU microcontroller chip 202 stops transmitting the preheating operation instruction to the motor 3, that is, controls no current to pass through the coil of the motor, and the motor 3 stops the heating operation;

[0046] The driver can observe the motor temperature presented by the display instrument 5 at any time. When the motor temperature reaches the preset temperature, the driver turns the electric lock for the second time, and the electric vehicle enters the start gear. At this time, the engine starts to run, and the driver starts to drive the vehicle.

[0047] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description in the specification only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. An electric vehicle motor preheating device, characterized in that it includes an electric lock, a controller, a motor, and a temperature sensor; The electric lock is electrically connected to the controller and is used to control the start and stop of the controller; The temperature sensor is arranged on the motor and is electrically connected to the motor and the controller respectively, and is used to monitor the real-time temperature of the motor and transmit the monitored motor temperature to the controller; The controller is electrically connected to the motor and is used to transmit operation instructions to the motor to drive and control the operation of the motor; A PCB circuit board is arranged inside the controller, and an MCU microcontroller chip is fixedly installed on the PCB circuit board; The MCU microcontroller chip is used to receive and process the monitoring data transmitted by the temperature sensor and transmit operation instructions to the motor.

2. The electric vehicle motor preheating device according to claim 1, characterized in that the electric vehicle motor preheating device further includes an RS485 circuit and a display instrument; The RS485 circuit is fixedly arranged on the PCB circuit board and is electrically connected to the MCU microcontroller chip and the display instrument, and is used to complete the communication operation between the controller and the display instrument; The display instrument is used to receive and display the motor monitoring temperature transmitted by the MCU microcontroller chip.

3. The preheating device for an electric vehicle motor according to claim 1 or 2, characterized in that, The temperature sensor is arranged at the coil of the motor.

4. The preheating device for an electric vehicle motor according to claim 1 or 2, characterized in that, The operation instructions transmitted by the MCU microcontroller chip to the motor include motor preheating, and the motor preheating is that a current continuously passes through the motor coil.

5. An electric vehicle motor preheating device according to claim 1 or 2, characterized in that, The operation instructions transmitted by the MCU microcontroller chip to the motor include stopping the motor preheating, and the stopping of the motor preheating is that the current stops passing through the motor coil.

6. The preheating device for an electric vehicle motor according to claim 1 or 2, characterized in that The MCU microcontroller chip is an LKS32MC single-chip microcomputer, and the temperature sensor is an MF58-103F3470FB temperature sensor.

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