阅读说明：本技术 基于电池温度的车辆电机控制装置及方法 (Vehicle motor control device and method based on battery temperature ) 是由 李珍镛 于 2019-06-27 设计创作，主要内容包括：本发明提供一种基于电池温度的车辆电机控制装置及方法。所述基于电池温度的车辆电机控制装置包括：电池温度传感器部,其测量工业车辆的电池组的温度；电池监控部,其监控所述温度传感器部的测量值,并在电池组的温度超过预先设定的基准值时传递温度信息；车辆控制部,其基于所述温度信息来限制从所述电池组接收电源的电机的驱动；以及风扇(fan)控制部,其基于所述温度信息来控制用于冷却电池组的风扇的驱动。(The invention provides a vehicle motor control device and method based on battery temperature. The battery temperature-based vehicle motor control apparatus includes: a battery temperature sensor unit that measures a temperature of a battery pack of an industrial vehicle; a battery monitoring part which monitors the measured value of the temperature sensor part and transmits temperature information when the temperature of the battery pack exceeds a preset reference value; a vehicle control portion that restricts driving of a motor that receives power from the battery pack based on the temperature information; and a fan (fan) control section that controls driving of a fan for cooling the battery pack based on the temperature information.)

1. A vehicle motor control apparatus based on battery temperature, characterized by comprising:

a battery temperature sensor unit that measures a temperature of a battery pack of an industrial vehicle;

a battery monitoring part which monitors the measured value of the temperature sensor part and transmits temperature information when the temperature of the battery pack exceeds a preset reference value;

a vehicle control portion that restricts driving of a motor that receives power from the battery pack based on the temperature information; and

a fan control part which controls the driving of a fan for cooling the battery pack based on the temperature information.

2. The battery temperature-based vehicle motor control apparatus according to claim 1, characterized by further comprising:

and an output unit that notifies a user of one or more of temperature information and a drive limit of the motor based on the temperature information.

3. The battery temperature-based vehicle motor control apparatus according to claim 1,

the vehicle control portion limits revolutions per minute of the driving motor and the pump motor when the battery temperature is higher than a preset driving limit temperature,

when the battery temperature is higher than a preset attention temperature, the fan control part drives a fan of the battery pack,

the drive limit temperature is the same as or higher than the attention temperature.

4. The battery temperature-based vehicle motor control apparatus according to claim 3,

the vehicle control portion removes a restriction of driving of the drive motor and the pump motor when the battery temperature is lower than a preset removal reference temperature;

the fan control part stops the driving of the fan of the battery pack when the battery temperature is lower than a preset safety reference temperature,

the release reference temperature is the same as or higher than the safety reference temperature.

5. The battery temperature-based vehicle motor control apparatus according to claim 4,

the noted temperature is the same as or higher than the safety reference temperature, and the driving restriction temperature is the same as or higher than the release reference temperature.

6. The battery temperature-based vehicle motor control apparatus according to claim 1,

the battery temperature sensor part includes a plurality of temperature sensors that sense temperatures of battery cells different from each other of a battery pack constituted by a plurality of battery cells,

the battery monitoring part transmits temperature information to the fan control part to turn on the battery fan when the measurement value of more than one temperature sensor in the plurality of temperature sensors exceeds a preset first reference temperature based on the temperature information; when the average value of the plurality of temperature sensors exceeds a first reference temperature set in advance, the battery monitoring unit transmits temperature information to a vehicle control unit to limit the driving of the drive motor and the hydraulic motor.

7. The battery temperature-based vehicle motor control apparatus according to claim 6,

the fan control unit transmits the temperature information to the vehicle control unit to release the restriction on the drive of the drive motor and the hydraulic motor when the measurement value of one or more of the plurality of temperature sensors is equal to or lower than a second reference temperature set in advance based on the temperature information;

when the average value of the plurality of temperature sensors is equal to or lower than a second reference temperature set in advance, the vehicle control unit transmits temperature information to a fan control unit to turn off the battery fan.

8. A method for controlling a vehicle motor based on battery temperature, comprising:

a step of measuring a temperature of a battery of the industrial vehicle by a battery temperature sensor;

monitoring the measured temperature by a battery monitoring part and transmitting temperature information when the measured temperature exceeds a preset reference value;

a step of driving a fan by a fan control section based on the temperature information to cool the battery pack; and

and restricting, by a vehicle control unit, driving of the drive motor and the pump motor based on the temperature information.

9. The battery temperature-based vehicle motor control method according to claim 8,

the step of restricting the drive of the drive motor and the pump motor by the vehicle control portion includes:

and limiting, by the vehicle control portion, revolutions per minute of the drive motor and the pump motor when the battery temperature is higher than a preset drive limit temperature.

10. The battery temperature-based vehicle motor control method according to claim 8, characterized by further comprising:

releasing, by the vehicle control unit, the drive of the drive motor and the pump motor when the battery temperature is lower than a preset release reference temperature; and

and a step in which the fan control unit stops driving of a fan of the battery pack when the battery temperature is lower than a preset safety reference temperature.

11. The battery temperature-based vehicle motor control method according to claim 8,

in the step of measuring the temperature of the battery of the industrial vehicle by the battery temperature sensor,

sensing, by a plurality of temperature sensors, temperatures of battery cells different from each other of a battery pack constituted by a plurality of battery cells;

in the step of driving the fan,

turning on the battery fan when the measurement value of one or more temperature sensors among the plurality of temperature sensors exceeds a first reference temperature set in advance,

in the step of limiting the driving of the driving motor and the pump motor,

and when the average value of the plurality of temperature sensors exceeds a preset first reference temperature, limiting the driving of the driving motor and the hydraulic motor.

12. The battery temperature-based vehicle motor control method according to claim 11, characterized by further comprising:

transmitting, by the fan control unit, temperature information to a vehicle control unit based on the temperature information, and releasing a restriction on driving of the drive motor and the hydraulic motor when a measurement value of one or more temperature sensors among the plurality of temperature sensors is equal to or lower than a second reference temperature set in advance; and

and a step of transmitting, by the vehicle control unit, temperature information to a fan control unit to turn off the battery fan when an average value of the plurality of temperature sensors is equal to or lower than a second reference temperature set in advance.

Technical Field

The present invention relates to a vehicle motor control apparatus and method based on battery temperature for use in an industrial vehicle.

Background

As a driving source for driving a driving motor and a hydraulic pump motor of an industrial vehicle, a battery is used, and the battery is very sensitive to temperature.

That is, heat is generated during charging or discharging of the battery, and when the generated heat rises to a predetermined temperature or higher, the life of the battery pack is reduced, and in a serious case, dangerous situations such as explosion and fire may occur.

Disclosure of Invention

Technical subject

The present invention is directed to solving the above-mentioned problems of the prior art, and an object of the present invention is to provide an apparatus and a method for reducing a durable life of a battery by controlling a vehicle motor so that a temperature of the battery does not rise above a predetermined temperature.

Another object of the present invention is to prevent a temperature rise of a battery unit and minimize a performance degradation work efficiency degradation of an industrial vehicle.

Technical scheme

To achieve the foregoing object, a vehicle motor control device based on battery temperature according to an embodiment of the present invention includes: a battery temperature sensor unit that measures a temperature of a battery pack of an industrial vehicle; a battery monitoring part which monitors the measured value of the temperature sensor part and transmits temperature information when the temperature of the battery pack exceeds a preset reference value; a vehicle control portion that restricts driving of a motor that receives power from the battery pack based on the temperature information; and a fan (fan) control section that controls driving of a fan for cooling the battery pack based on the temperature information.

The vehicle motor control apparatus based on the battery temperature further includes: and an output unit that notifies a user of one or more of the temperature information and the drive limit of the motor based on the temperature information.

The vehicle control part limits Revolutions Per Minute (RPM) of a driving motor and a pump motor when the battery temperature is higher than a preset driving limit temperature, and the fan control part drives a fan of a battery pack when the battery temperature is higher than a preset attention temperature.

The drive limit temperature is the same as or higher than the attention temperature.

The vehicle control portion removes a restriction of driving of the drive motor and the pump motor when the battery temperature is lower than a preset removal reference temperature; the fan control part stops the driving of the fan of the battery pack when the battery temperature is lower than a preset safety reference temperature.

The release reference temperature is the same as or higher than the safety reference temperature.

The noted temperature is the same as or higher than the safety reference temperature, and the driving restriction temperature is the same as or higher than the release reference temperature.

The battery temperature sensor unit includes a plurality of temperature sensors that sense temperatures of different battery cells of a battery pack including a plurality of battery cells, and the battery monitoring unit transmits temperature information to the fan control unit to turn on the battery fan when a measurement value of one or more of the plurality of temperature sensors exceeds a first reference temperature that is set in advance, based on the temperature information; when the average value of the plurality of temperature sensors exceeds a first reference temperature set in advance, the battery monitoring unit transmits temperature information to a vehicle control unit to limit the driving of the drive motor and the hydraulic motor.

The fan control unit transmits the temperature information to the vehicle control unit to release the restriction on the drive of the drive motor and the hydraulic motor when the measurement value of one or more of the plurality of temperature sensors is equal to or lower than a second reference temperature set in advance based on the temperature information; when the average value of the plurality of temperature sensors is equal to or lower than a second reference temperature set in advance, the vehicle control unit transmits temperature information to a fan control unit to turn off the battery fan.

The vehicle motor control method based on the battery temperature of one embodiment of the invention comprises the following steps: a step of measuring a temperature of a battery of the industrial vehicle by a battery temperature sensor; monitoring the measured temperature by a battery monitoring part and transmitting temperature information when the measured temperature exceeds a preset reference value; a step of driving a fan by a fan control section based on the temperature information to cool the battery pack; and restricting, by a vehicle control unit, driving of the drive motor and the pump motor based on the temperature information.

The step of restricting the drive of the drive motor and the pump motor by the vehicle control portion includes: a step of limiting Revolutions Per Minute (RPM) of a driving motor and a pump motor by the vehicle control part when the battery temperature is higher than a preset driving limit temperature.

The vehicle motor control method based on the battery temperature further includes: releasing, by the vehicle control unit, a restriction on driving of the drive motor and the pump motor when the battery temperature is lower than a preset release reference temperature; and stopping the driving of the fan of the battery pack by the fan control unit when the battery temperature is lower than a preset safety reference temperature.

In the step of measuring the temperature of the battery of the industrial vehicle by the battery temperature sensor, the temperatures of the battery cells different from each other of the battery pack constituted by the plurality of battery cells are sensed by the plurality of temperature sensors.

In the step of driving the fan, the battery fan is turned on when a measurement value of one or more temperature sensors among the plurality of temperature sensors exceeds a first reference temperature set in advance.

In the step of limiting the driving of the driving motor and the pump motor, the driving of the driving motor and the hydraulic motor is limited when an average value of the plurality of temperature sensors exceeds a first reference temperature set in advance.

The vehicle motor control method based on the battery temperature further includes: transmitting, by the fan control unit, temperature information to a vehicle control unit based on the temperature information, and releasing a restriction on driving of the drive motor and the hydraulic motor when a measurement value of one or more temperature sensors among the plurality of temperature sensors is equal to or lower than a second reference temperature set in advance; and transmitting, by the vehicle control unit, temperature information to a fan control unit to turn off the battery fan when an average value of the plurality of temperature sensors is equal to or lower than a second reference temperature set in advance.

ADVANTAGEOUS EFFECTS OF INVENTION

According to an embodiment of the present invention, the temperature of the battery is not increased any more, so that the endurance life of the battery can be prevented from being reduced.

Further, the temperature of the battery cell is prevented from rising, and the performance degradation of the industrial vehicle is minimized.

Drawings

Fig. 1 is a block diagram schematically showing an internal configuration of a motor control device of an industrial vehicle according to an embodiment of the present invention.

Fig. 2 is an exemplary diagram for explaining setting of a reference range corresponding to a temperature of a battery pack of an industrial vehicle according to an embodiment of the present invention.

Fig. 3 is a block diagram schematically showing an internal structure of a motor control device of an industrial vehicle according to another embodiment of the present invention.

Fig. 4 is a flowchart for explaining a motor control method of an industrial vehicle according to an embodiment of the present invention.

Fig. 5 is a flowchart for explaining a motor control method of an industrial vehicle according to another embodiment of the present invention.

Fig. 6 is an illustration of a screen showing whether to restrict the motor according to an embodiment of the specification.

Description of the symbols

110: battery pack, 120, 1120: temperature sensor portion, 130: interface section, 140, 1140: battery monitoring unit, 150, 1150: vehicle control unit, 160: fan control unit, 170: an output unit.

Detailed Description

It is to be noted that the technical terms used in the present invention are only used for describing specific embodiments and are not intended to limit the present invention. Furthermore, unless specifically defined to have a different meaning, technical terms used in the present invention should be construed as having a meaning commonly understood by one of ordinary skill in the art to which the present invention belongs, and should not be construed as having an excessively inclusive meaning or an excessively reduced meaning.

Furthermore, unless the context clearly dictates otherwise, as used herein, singular expressions include plural expressions. In the present application, the terms "composed of … …" or "including" should not be construed as necessarily including all of the constituent elements or steps described in the specification, but should be construed as not including some of the constituent elements or steps or as including additional constituent elements or steps.

The suffixes "module" and "portion" of the constituent elements used in the present invention are given or shared only in consideration of ease of writing the specification, and do not have meanings or functions different from each other by themselves.

Also, terms used in the present invention, including ordinal numbers such as first, second, etc., may be used to describe various components, but these components should not be limited by these terms. These terms are used only for the purpose of distinguishing one constituent element from another constituent element. For example, a first component may be named a second component, and similarly, a second component may also be named a first component, without departing from the scope of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or similar components will be given the same reference numerals regardless of the reference numerals, and overlapping descriptions thereof will be omitted.

Further, it is to be noted that the drawings are only for the purpose of facilitating understanding of the idea of the present invention, and the idea of the present invention is not limited by the accompanying drawings.

Fig. 1 is a block diagram schematically showing an internal configuration of a motor control device for an industrial vehicle according to an embodiment of the present invention, and fig. 2 is an exemplary diagram for explaining setting of a reference range corresponding to a temperature of a battery pack of the industrial vehicle according to the embodiment of the present invention.

As illustrated in fig. 1, the battery temperature-based vehicle motor control apparatus of the industrial vehicle of the present invention may include a battery pack 110, a temperature sensor part 120, an interface part 130, a battery monitoring part 140, a vehicle control part 150, a fan (fan) control part 160, and an output part 170.

The battery pack 110 supplies driving voltages to various motors of the industrial vehicle. The battery pack 110 is composed of at least one battery cell. The battery cell refers to the smallest unit that can be repeatedly charged and discharged by an electrochemical reaction.

The temperature sensor part 120 is connected to the battery pack to measure the temperature of the battery cell. As the temperature sensor, a thermistor whose resistance value is variable according to temperature may be used.

The temperature sensor portion 120 transmits the measured value to the battery monitoring portion 140.

The interface unit 130 includes an input unit for inputting a predetermined signal by an operation of an operator or a setter.

The battery monitoring part 140 includes a microprocessor and/or a circuit for sensing a battery state of a supply power of the battery pack 110 to the respective parts and controlling for proper use.

The battery monitoring part 140 reads a signal indicating the temperature of the corresponding battery cell from the temperature sensor part 120, and monitors whether the temperature of the battery cell exceeds a preset safety range.

When the temperature of the battery cell exceeds a preset safety range, the battery monitoring part 140 transmits temperature information of the battery pack to the fan control part 160 or the vehicle control part 150.

The vehicle control unit 150 controls the motor drive and the hydraulic pump motor drive, and controls the performance of the drive motor and the hydraulic pump motor.

The vehicle control portion 150 restricts or releases the driving of the motor that receives the voltage from the battery pack 110 based on the temperature information received from the battery monitoring portion 140. The motor may include one or more of a driving motor and a hydraulic pump motor.

The vehicle control unit 150 controls the RPM of the motor by controlling the output current, thereby controlling the performance of the driving motor and the hydraulic pump motor. More specifically, when the temperature of the battery pack 110 is higher than a first reference temperature set in advance, the vehicle control section 150 restricts the driving of the drive motor, the hydraulic pump motor; when the measured temperature is lower than a second reference temperature set in advance, the vehicle control section 150 releases the restriction of the driving of the hydraulic pump motor. The second reference temperature is the same as or lower than the first reference temperature. The second reference temperature may be lower than the first reference temperature and higher than the third reference temperature. When the second reference temperature is lower than the first reference temperature, the performance limitation and release are not continuously selected and changed, so that the safety in the system can be improved.

Fan control unit 160 is connected to a motor of the fan of battery pack 110 to control driving of the fan motor.

The battery pack 110 is provided in a tray provided with a cooling fan for discharging heat generated from the battery pack 110 to the outside. An air inlet and an air outlet are provided at any position on both sides of the tray in opposite directions, and when the cooling fan is driven, air sucked in from the air inlet is discharged through the air outlet to lower the temperature of the battery pack 110.

The control part 160 receives the temperature information, and when the measured temperature is higher than a preset third reference temperature, the control part 160 drives the fan; when the measured temperature is lower than a fourth reference temperature set in advance, the control section 160 stops the driving of the fan. The fourth reference temperature is the same as or lower than the third reference temperature. When the reference temperature is lower than the third reference temperature, the driving and stopping of the fan are not continuously selected and changed, so that the safety in the system can be improved.

The third reference temperature is the same as or lower than the first reference temperature. The fourth reference temperature is the same as or lower than the second reference temperature.

The output unit 170 outputs information received from the control unit 150. The information may include notification of temperature information, restriction of driving of the hydraulic pump motor, or restriction release. The information may include a notification of the fan drive or a stop of the fan drive.

As illustrated in fig. 2, the temperature above the first reference temperature belongs to the warning range of the battery pack temperature, and the temperature between the first reference temperature and the third reference temperature belongs to the attention range.

Fig. 2 discloses a safety range of 30 ° to 60 °, a caution range of 60 ° to 65 °, and a risk range of 65 ° to 70 °, but this is only an example and is not limited thereto. The temperature range can be changed by an operator or a setter.

That is, when the temperature of the battery pack becomes the third reference temperature at which the safety range enters the attention range, the battery monitoring unit 140 transmits temperature information to the fan control unit 160 to drive the fan, thereby lowering the temperature of the battery pack. When the temperature of the battery pack becomes the first reference temperature at which the attention range enters the dangerous range, the battery monitoring unit 140 transmits temperature information to the vehicle control unit 150, and the vehicle control unit 150 restricts the driving of the motor so that the battery temperature does not rise any more.

Fig. 3 is a block diagram schematically showing an internal structure of a motor control device of an industrial vehicle according to another embodiment of the present invention.

The same reference numerals as in fig. 1 denote the same constituent elements, and thus a detailed description will be omitted.

As illustrated in fig. 1, the industrial vehicle of the present invention may include a battery pack 110, a temperature sensor part 1120, an interface part 130, a battery monitoring part 1140, a vehicle control part 1150, a fan (fan) control part 1160, and an output part 170.

The battery pack 110 supplies driving voltages to various motors of the industrial vehicle. The battery pack 110 is composed of a plurality of battery cells.

The temperature sensor portion 1120 is connected to the battery pack to measure the temperature of the battery cell. The temperature sensor portion 120 includes a plurality of temperature sensors. The plurality of temperature sensors measure temperatures of battery cells different from each other of a battery pack constituted by a plurality of battery cells.

The temperature sensor portion 1120 transmits the measured value to the battery monitoring portion 1140.

The battery monitoring part 1140 monitors the state of the battery pack 110.

The battery monitoring part 1140 receives the measured values of the plurality of temperature sensors of the temperature sensor part 1120, and transmits temperature information to the vehicle control part 1150 and the fan control part 1160 when the received measured values exceed a preset reference value.

Further, the fan control unit 1160 transmits the temperature information to the fan control unit 1160 to turn on the battery fan when the measurement value of one or more temperature sensors among the plurality of temperature sensors exceeds a first reference temperature set in advance based on the temperature information received from the battery monitoring unit 1140.

The battery monitoring unit 1140 calculates an average value of the plurality of temperature sensors when the measurement value of one or more temperature sensors among the plurality of temperature sensors exceeds a first reference temperature (drive limit temperature) set in advance. When the average value of the plurality of temperature sensors exceeds a first reference temperature set in advance, temperature information is transmitted to the vehicle control unit 1150 to control the performance of the drive motor and the hydraulic motor.

When the average value of the temperature sensors is lower than a preset third reference temperature (release reference temperature), the battery monitoring section 1140 transmits temperature information to the vehicle control section 1150 to release the performance limitation, and when the temperature sensors are all lower than the third reference temperature, the battery monitoring section 1140 transmits temperature information to the fan control section 1160 to turn off the battery fan. The third reference temperature is lower than the first reference temperature. The first reference temperature is a reference temperature at which the temperature of the battery cell enters the dangerous range from the caution range, and the third reference temperature is a reference temperature at which the temperature of the battery cell enters the caution range from the safety range.

The vehicle control unit 1150 controls the RPM of the motor by controlling the output current, thereby controlling the performance of the motor and the hydraulic pump motor.

The vehicle control section 1150 restricts driving or releases restriction of the motor that receives the voltage from the battery pack 110 based on the temperature information received from the battery monitoring section 1140. The motor may include one or more of a driving motor and a hydraulic pump motor.

More specifically, when the average temperature of the battery pack 110 is higher than a first reference temperature set in advance, the vehicle control section 1150 restricts the drive of the drive motor, the hydraulic pump motor; when the measured temperature is lower than a preset third reference temperature, the vehicle control section 1150 releases the restriction of the driving of the hydraulic pump motor. The third reference temperature is the same as or lower than the first reference temperature.

Based on the temperature information received from the battery monitoring portion 1140, the vehicle control portion 1150 releases the performance limitation of the motor when the average value of the plurality of temperature sensors is lower than a third reference temperature set in advance.

Based on the temperature information received from the battery monitoring part 1140, the fan control part 1160 turns off the fan motor 10 when the temperatures of the plurality of temperature sensors are all lower than the third reference temperature.

Fig. 4 is a flowchart for explaining a motor control method of an industrial vehicle according to an embodiment of the present invention.

The temperature of the battery pack of the industrial vehicle is measured by the temperature sensor (S100).

The battery monitoring unit compares the temperature measured by the temperature sensor with a preset limit temperature (S110). According to the comparison result, the battery monitoring part transmits the temperature information to the fan control part or the vehicle control part. The battery monitoring unit may transmit the temperature information to the output unit, and output the information visually or audibly to enable the operator to confirm the information.

Based on the comparison result of the battery monitoring unit, the vehicle control unit restricts the driving of the drive motor and the hydraulic pump motor, and the fan control unit drives the fan motor (S120).

As a method of restricting the driving of the driving motor and the hydraulic pump motor, there is a method of restricting Revolutions Per Minute (RPM).

In order to limit the rpm and ensure the safety of the system, it is reduced by a preset percentage (%) at preset intervals. For example, 10% of the current rpm (a1) is reduced for a period of up to 5 minutes, after which, after 5 minutes, a 10% reduction in rpm may be achieved.

The battery monitoring unit continues to monitor the temperature of the battery pack and compares the temperature with a preset release temperature (S130).

When the temperature of the battery pack is lower than a preset release temperature, the battery monitoring unit transmits temperature information to the fan control unit and the vehicle control unit, the fan control unit which receives the temperature information stops the fan motor, and the vehicle control unit releases the restriction on the driving of the driving motor and the hydraulic pump motor (S140).

Fig. 5 is a flowchart for explaining a motor control method of an industrial vehicle according to another embodiment of the present invention, and fig. 6 is an exemplary view of a screen showing whether to restrict a motor according to an embodiment of the present disclosure.

The battery monitoring unit monitors sensing values of a plurality of temperature sensors that sense temperatures of battery cells of the battery pack that are different from each other (200).

The battery monitoring unit checks whether or not the measured values of 1 or more temperature sensors are equal to or higher than a preset limit temperature (S210).

In step S210, when it is determined that the measured values of the 1 or more temperature sensors are equal to or higher than the preset limit temperature, the battery monitoring unit drives the fan motor (S220).

In step S210, if the battery monitoring unit determines that the measured value of any one of the temperature sensors is also lower than the preset limit temperature, the process returns to step S200.

After step S220, the battery monitoring unit checks whether or not the average temperature of the measurement values of the plurality of temperature sensors is equal to or higher than the limit temperature (S230). When the average temperature of the plurality of temperature sensors is equal to or higher than the limit temperature, the temperature information is transmitted to the vehicle controller to limit the driving of the motor (S240).

If it is determined in step S230 that the average temperature of the measurement values of the plurality of temperature sensors is lower than the limit temperature, the battery monitoring unit continues to monitor the measurement values of the plurality of temperature sensors.

After step S240, the battery monitoring unit continues to monitor the measurement values of the plurality of temperature sensors, and the battery monitoring unit checks whether or not the average temperature of the measurement values of the plurality of temperature sensors is equal to or lower than a preset release reference temperature (S250).

In step S260, when the average temperature of the plurality of temperature sensors is lower than the release temperature, the battery monitoring section releases the drive restriction of the motor (S260).

After step S260, the battery monitoring unit continues to monitor the measurement values of the plurality of temperature sensors, and confirms whether or not the measurement values of the plurality of temperature sensors are all lower than a preset release temperature (S270).

In step S260, when the measurement values of the plurality of temperature sensors are all lower than the preset release temperature, the battery monitoring unit transmits the temperature information to the fan control unit, and the fan control unit stops the driving of the fan (S280).

In step S270, when any one of the measured values of the plurality of temperature sensors is equal to or higher than the preset cancellation temperature, the process returns to step S200.

In the method for controlling the performance of a motor based on the temperature of a battery using a plurality of temperature sensors according to the present invention, a fan is driven when any one of the temperatures of the plurality of temperature sensors exceeds a predetermined range; when the average temperature of the temperatures of the plurality of temperature sensors exceeds a preset range, the driving of the motor of the industrial vehicle is restricted.

In another modification, before the vehicle control unit 150 controls the motor drive and the RPM of the hydraulic pump, a message 52 notifying the fact of the motor restriction or the release of the motor restriction is output to the display screen 51 of the output unit as illustrated in fig. 6.

Further, the confirmation icon 53 and the cancel icon 54 of the message may be provided at the same time. The operator can prevent the transmission of the RPM limit signal of the vehicle control part 150, 1150 by the cancel icon 54 of the message 52 notifying the fact of the motor limit.

When the cancel icon 54 is selected by the operator, the interface unit 130 transmits a signal for preventing transmission of the RPM limit signal to the vehicle control units 150 and 1150. If the vehicle control part 150, 1150 receives a signal for preventing transmission of the RPM limit signal from the interface part 130, transmission of the RPM limit signal can be prevented.

In this manner, the procedure of obtaining confirmation from the operator through the display screen 51 may be added or deleted by the designer, or may be set to be selected by the operator.

When the confirmation is performed from the operator through the display screen 51, the control of the RPM of the motor which is contrary to the intention of the operator can be prevented.

It will be appreciated by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments described above are therefore illustrative in all respects and should not be construed as limiting. The scope of the present invention is defined by the claims to be described later rather than the detailed description, and all modifications and variations derived from the meaning and scope of the claims and the equivalent concept thereof should be construed as falling within the scope of the present invention.

On the other hand, the present specification and the drawings disclose preferred embodiments of the present invention, and although specific terms are used, they are used in a general sense for facilitating understanding of technical contents of the present invention and facilitating understanding of the invention, and are not intended to limit the scope of the present invention. It is obvious to a person having ordinary skill in the art to which the present invention pertains that other modifications based on the technical idea of the present invention may be implemented in addition to the embodiments disclosed herein.