JP2005184979A - Power unit for vehicle, and power unit for hybrid car - Google Patents

Power unit for vehicle, and power unit for hybrid car Download PDF

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Publication number
JP2005184979A
JP2005184979A JP2003421994A JP2003421994A JP2005184979A JP 2005184979 A JP2005184979 A JP 2005184979A JP 2003421994 A JP2003421994 A JP 2003421994A JP 2003421994 A JP2003421994 A JP 2003421994A JP 2005184979 A JP2005184979 A JP 2005184979A
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Japan
Prior art keywords
duty
battery
blower fan
temperature
switching element
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JP2003421994A
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Japanese (ja)
Inventor
Kazuki Bashijiyu
Hideo Shimizu
Naoki Tsuzurano
秀男 志水
和樹 橋住
直樹 黒葛野
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Sanyo Electric Co Ltd
三洋電機株式会社
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Priority to JP2003421994A priority Critical patent/JP2005184979A/en
Publication of JP2005184979A publication Critical patent/JP2005184979A/en
Application status is Pending legal-status Critical

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7005Batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y02T10/7077Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors on board the vehicle

Abstract

<P>PROBLEM TO BE SOLVED: To effectively prevent the temperature trouble of a battery by efficiently cooling the battery while reducing the noise reaching the ear of a person in a car. <P>SOLUTION: A power unit cools the battery by compulsively blowing air to a battery unit 1 equipped with two or more batteries by means of a blast fan 5, and changes the fan duty of switching on or switching off a switching element 9 for controlling the power to be supplied to the blast fan 5 by means of a control circuit 2. The control circuit 2 detects the battery temperature of the battery unit 1 by means of a temperature sensor 4, and detects either or both of the car velocity of the vehicle and the number of engine revolutions, and changes the duty of switching on or switching off the switching element 9, with either or both of the car velocity and the number of engine revolutions as a parameters. When the battery temperature of the battery unit 1 goes high, or the car velocity increases, or the number of engine revolution increases, it enlarges the duty of switching on or switching off the switching element 9 so as to increase the power to be supplied to the blast fan 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a power supply device for a vehicle and a power supply device for a hybrid car having a mechanism for forcibly cooling by blowing air with a blower fan.

A power supply device mounted on a vehicle such as an electric vehicle or a hybrid car incorporates a large-capacity secondary battery in order to drive a motor that drives the vehicle. Since this power supply device includes a battery unit that generates a large amount of heat, the battery of the battery unit is forcibly cooled by a blower fan so that the temperature does not become abnormally high. The blower fan is cooled so that the temperature of the battery does not increase, and is thus operated when the temperature of the battery increases. The operation of the blower fan is controlled by a built-in control circuit. The control circuit detects the temperature of the battery, and when the detected temperature becomes higher than the set temperature, it operates the blower fan to cool the battery (see Patent Document 1).
JP 2002-51479 A

  The power supply device described in this publication changes the duty of electric power supplied to the blower fan at the battery temperature. The duty is controlled by the timing for switching on / off the power supply switch of the blower fan at a constant cycle, that is, PWM for changing the pulse width. The duty is specified by the ratio (t / T) of the on time (t) to the time (T) of one cycle for turning on and off the power switch. When the duty is increased, the power supplied to the blower fan increases. When the duty is set to 100%, the power switch is continuously turned on. When the duty is set to 50%, the power switch is turned on for half of one cycle. In the state where the duty is 0%, the power switch is always off. Therefore, the PWM that changes the pulse width for turning on the power switch can change the duty and control the power supplied to the blower fan.

  The above publication increases the duty to increase the power supplied to the blower fan when the temperature of the power supply module increases. That is, when the temperature of the power supply module rises, the rotation of the blower fan is accelerated, and the flow rate of the air supplied to the power supply module is increased, thereby efficiently cooling. When the temperature of the power supply module is lowered, the duty is reduced and the power supplied to the blower fan is controlled to be small. In this state, cooling of the power supply module is reduced, but since the temperature is low, the temperature does not rise to an abnormal temperature.

  Although the above power supply device controls the power supplied to the blower fan, noise from the blower fan increases when the temperature of the power supply module increases and the power supplied to the blower fan increases. Since the blower fan is mounted on an electric vehicle or a hybrid car, there is a drawback that if the supplied power is increased and the rotation speed is increased, the noise level in the vehicle is increased and it cannot be quietly performed. In particular, the hybrid car has a drawback that the noise of the blower fan becomes very audible when the engine is stopped while the vehicle is stopped because the interior of the vehicle becomes extremely quiet. This drawback can be solved by reducing the power supplied to the blower fan. However, this method may cause the power module to become abnormally hot and cause a temperature failure. Cooling the power supply module effectively and lowering the noise level in the room are mutually contradictory characteristics and cannot satisfy both. However, electric vehicles and hybrid vehicles are required to have a noise level that is not comparable to vehicles that do not always stop the engine.

  The present invention is a power supply device for a vehicle that is used in a vehicle such as an electric vehicle or a hybrid car to effectively cool a battery and effectively prevent a battery temperature failure while reducing noise heard by a person in the vehicle. It was developed for the purpose of providing a hybrid car power supply.

  The power supply device for a vehicle according to claim 1 of the present invention includes a battery unit 1 including a plurality of batteries, a blower fan 5 that forcibly blows air to the battery unit 1 and cools the battery, and supplies the blower fan 5. And a control circuit 2 that controls the power supplied to the blower fan 5 by the PWM pulse width by changing the fan duty for repeatedly turning on and off the switching element 9 at a predetermined cycle. In addition to detecting the battery temperature of the battery unit 1 with the temperature sensor 4, the control circuit 2 detects the vehicle speed of the mounted vehicle by detecting the vehicle speed signal output from the vehicle on which the power supply device is mounted. The duty for turning on / off the switching element 9 is changed with both the vehicle speed as a variable, and when the battery temperature of the battery unit 1 increases or the vehicle speed increases, the duty for turning on / off the switching element 9 is increased and supplied to the blower fan 5. Control to increase power.

  The power supply device for a vehicle according to claim 2 of the present invention stores a function in which the control circuit 2 calculates a battery temperature and a duty for turning on and off the switching element 9 of the blower fan 5 using the vehicle speed as variables. The battery temperature is detected and the duty is calculated, and the power supplied to the blower fan 5 is controlled with the calculated duty.

  In the power supply device for a vehicle according to claim 3 of the present invention, the control circuit 2 stores the temperature duty for the battery temperature and the vehicle speed duty for the vehicle speed, and selects either the temperature duty or the vehicle speed duty. Thus, the duty for turning on and off the switching element 9 that controls the power supplied to the blower fan 5 is specified.

  A power supply device for a hybrid car according to a fourth aspect of the present invention includes a battery unit 1 including a plurality of batteries, a blower fan 5 that forcibly blows air to the battery unit 1 and cools the battery, and supplies the blower fan 5. And a control circuit 2 that controls the power supplied to the blower fan 5 by the PWM pulse width by changing the fan duty for repeatedly turning on and off the switching element 9 at a predetermined cycle. In addition to detecting the battery temperature of the battery unit 1 with the temperature sensor 4, the control circuit 2 detects the engine speed of the mounted vehicle by detecting a speed signal indicating the engine speed of the vehicle on which the power supply device is mounted. Then, the duty for turning on / off the switching element 9 is changed using both the battery temperature and the engine speed as variables, and the switching element 9 is turned on / off when the battery temperature of the battery unit 1 increases or the engine speed of the vehicle increases. Control is performed so that the power supplied to the blower fan 5 is increased by increasing the duty.

  The power supply device for a hybrid car according to claim 5 of the present invention stores a function for the control circuit 2 to calculate a duty for turning on and off the switching element 9 of the blower fan 5 using the battery temperature and the engine speed as variables. The battery temperature and the engine speed are detected to calculate the duty, and the power supplied to the blower fan 5 is controlled with the calculated duty.

  In the hybrid car power supply device according to claim 6 of the present invention, the control circuit 2 stores the temperature duty with respect to the battery temperature and the engine speed duty with respect to the engine speed, and the temperature duty and the engine speed duty are determined. Either is selected and the duty which turns on and off the switching element 9 which controls the electric power supplied to the ventilation fan 5 is specified.

  A power supply device for a hybrid car according to a seventh aspect of the present invention includes a battery unit 1 including a plurality of batteries, a blower fan 5 that forcibly blows air to the battery unit 1 and cools the battery, and supplies the blower fan 5. And a control circuit 2 that controls the power supplied to the blower fan 5 by the PWM pulse width by changing the fan duty for repeatedly turning on and off the switching element 9 at a predetermined cycle. In addition to detecting the battery temperature of the battery unit 1 with the temperature sensor 4, the control circuit 2 detects the vehicle speed signal output from the vehicle on which the power supply device is mounted and the rotational speed signal indicating the engine rotational speed to mount the vehicle. The vehicle speed and the engine speed are detected, the duty for turning on and off the switching element 9 is changed using the battery temperature, the vehicle speed and the engine speed as variables, and the battery temperature of the battery unit 1 is increased, the vehicle speed is increased, or When the engine speed increases, the duty for turning on and off the switching element 9 is increased so that the power supplied to the blower fan 5 is increased.

  The power supply apparatus for a hybrid car according to claim 8 of the present invention stores a function in which the control circuit 2 calculates a duty for turning on and off the switching element 9 of the blower fan 5 using the battery temperature, the vehicle speed, and the engine speed as variables. The battery temperature, the vehicle speed, and the engine speed are detected, the duty is calculated, and the power supplied to the blower fan 5 is controlled with the calculated duty.

  In the hybrid car power supply device according to claim 9 of the present invention, the control circuit 2 stores the temperature duty with respect to the battery temperature, the vehicle speed duty with respect to the vehicle speed, and the engine speed duty with respect to the engine speed. The vehicle speed duty and the engine speed duty are selected to specify the duty for turning on and off the switching element 9 that controls the power supplied to the blower fan 5. The control circuit 2 preferably operates the blower fan 5 at a duty having the largest temperature duty, vehicle speed duty, and engine speed duty.

  The power supply device of the present invention is used in a vehicle such as an electric car or a hybrid car, and can effectively cool the battery while effectively reducing the noise audible to human ears in the car, thereby effectively preventing the battery temperature failure. There are features. This is because the power supply device of the present invention detects the vehicle speed and the engine speed, and changes the duty for switching on and off the switching element that supplies power to the blower fan according to the vehicle speed and the engine speed. As the vehicle travels faster, noise increases. Further, the noise level increases even when the engine speed increases. Therefore, even if the duty to turn on and off the switching element that supplies power to the blower fan is increased while the vehicle speed and engine speed are increased, the driver will make the operation sound of the blower fan an audible noise even if the fan is rotated quickly. I don't listen. This is because the noise of the vehicle and the engine masks the operation sound of the blower fan and reduces the ear sensitivity.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a power supply apparatus for a hybrid car for embodying the technical idea of the present invention, and the present invention does not specify the power supply apparatus as follows.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  FIG. 1 shows a charging device mounted on a hybrid electric vehicle. The power supply device of this figure is equipped with a battery unit 1 that drives a motor 3 that runs an automobile. The battery unit 1 includes a plurality of batteries connected in series or in parallel, and a secondary battery such as a nickel-hydrogen battery, a lithium ion secondary battery, or a nickel-cadmium battery is used as the battery. The hybrid electric vehicle is equipped with a generator 11 for charging the battery of the battery unit 1 as a charger. The generator 11, which is a charger, is driven by the engine 10 or is driven by the wheel 13 when the automobile decelerates, and charges the battery of the battery unit 1. The power supply device includes a control circuit 2 for controlling charging and discharging of the battery unit 1 and controlling the operation of the cooling fan 5. A temperature sensor 4 that detects the battery temperature of the battery unit 1 is connected to the control circuit 2.

  The power supply device further includes a blower fan 5 that cools when the battery temperature built in the battery unit 1 rises, and a switching element 9 that controls the power supplied to the blower fan 5. The blower fan 5 forcibly blows air into the battery unit 1 to forcibly cool the battery. The blower fan 5 includes a fan 7 that forcibly blows air to the battery of the battery unit 1 and a fan motor 8 that rotates the fan 7. The switching element 9 controls the power supplied to the fan motor 8. The switching element 9 supplies power to the fan motor 8 from the electrical battery 6 that is a lead battery. The battery 6 for electric equipment is charged by reducing the voltage of the battery unit 1 by the down converter 12 or is charged by a generator that generates electricity by the engine. The fan motor of the blower fan can also supply power by stepping down the voltage of the battery unit with a down converter.

  The down converter 12 steps down the voltage of the battery unit 1 to the DC voltage of the electrical battery 6 that drives the fan motor 8. Since the output of the battery unit 1 is a direct current, the down converter 12 is a DC / DC converter. The switching element 9 controls the average power supplied to the fan motor 8 of the blower fan 5 by switching the DC voltage supplied from the electrical equipment battery 6. The power supply is controlled by changing the duty at which the switching element 9 is switched on and off, that is, the duty of the on-time in one cycle, that is, the PWM pulse width. The duty of PWM is adjusted in the range of 0 to 100%. The duty 0% is a state in which the switching element 9 is always off, the duty 100% is a state in which the switching element 9 is always on, and the duty 50% is the on time. This is a state in which the off time is the same time.

  When the PWM duty is reduced, the power supplied to the blower fan 5 is reduced, the rotational speed of the fan motor 8 is lowered, and the air volume of the blower fan 5 is reduced. On the other hand, when the duty of PWM is increased, the power supplied to the blower fan 5 is increased, the rotational speed of the fan motor 8 is increased, and the amount of cooling air is increased. The duty for turning on and off the switching element 9 is controlled by the control circuit 2.

  Further, the hybrid electric vehicle includes a motor 3 that is supplied with electric power from the battery unit 1 and runs the vehicle. The motor 3 is connected to the wheel 13 of the automobile via a power transmission mechanism such as a planetary gear mechanism and drives the wheel 13. The hybrid electric vehicle is driven by both the motor 3 and the engine 10. The rate at which the motor 3 and the engine 10 drive the wheels 13 is controlled by the vehicle control device 14.

  The battery unit 1 is discharged by supplying electric power to the motor 3 and is charged by a charger which is a generator 11 driven by the engine 10 and the wheels 13. The generator 11 is driven by the engine 10 or is driven by the wheel 13 to charge the battery of the battery unit 1. The wheel 13 drives the generator 11 when decelerating by stepping on a brake or descending a slope. When the wheel 13 rotates the generator 11, braking force is generated on the wheel 13. Therefore, in this state, the automobile is decelerated by the regenerative brake. The braking force of the regenerative brake is controlled by the current with which the generator 11 charges the battery. Increasing the charging current of the battery increases the braking force of the regenerative brake.

  The control circuit 2 detects the voltage and temperature of the battery of the battery unit 1 and detects that the battery of the battery unit 1 is fully charged. When the battery of the battery unit 1 is fully charged, the control circuit 2 stops charging and prevents the battery of the battery unit 1 from being overcharged. This is to prevent the battery from being overcharged and deteriorating.

  In the hybrid electric vehicle in which the generator 11 is driven by both the engine 10 and the wheel 13, the control circuit 2 controls both the generator 11 and the engine 10 to stop charging the fully charged battery. In a hybrid electric vehicle in which the generator is not driven by the engine but is driven only by the wheels, the control circuit controls only the generator and stops charging the battery.

  Furthermore, in addition to detecting the battery temperature of the battery unit 1, the control circuit 2 detects the vehicle speed or the engine speed and changes the duty for switching the switching element 9 on and off. The control circuit 2 detects either the vehicle speed or the engine speed, and changes the duty of the switching element 9. However, the control circuit 2 can change the duty for switching the switching element 9 on and off based on the vehicle speed and the engine speed in addition to the battery temperature. The control circuit 2 detects the vehicle speed and the engine speed from the vehicle control device 14 mounted on the vehicle. The vehicle control device 14 includes a vehicle speed output for detecting a vehicle speed and outputting a pulse proportional to the vehicle speed, and an engine speed output for detecting an engine speed and outputting a pulse proportional to the engine speed. The vehicle speed output outputs a number of pulses proportional to the vehicle speed per unit time. The engine speed output outputs a number of pulses proportional to the engine speed per unit time.

  The control circuit 2 for detecting the vehicle speed counts the number of pulses output from the vehicle speed output, and detects the vehicle speed of the automobile equipped with the power supply device. The control circuit 2 that detects the engine speed counts the number of pulses output from the engine speed output, and detects the engine speed.

  The control circuit 2 that controls the duty for PWMing the switching element 9 with the battery temperature and the vehicle speed detects the battery temperature of the battery unit 1 with the temperature sensor 4, detects the vehicle speed with the vehicle speed output of the vehicle control device 14, and The duty for turning on and off the switching element 9 is changed using both the vehicle speed as a variable. When the battery temperature of the battery unit 1 is increased or the vehicle speed is increased, the control circuit 2 performs control such that the duty for turning on / off the switching element 9 is increased and the power supplied to the blower fan 5 is increased.

The control circuit 2 stores a function for calculating the duty of the blower fan 5 using the battery temperature and the vehicle speed as variables. From this function, the duty is calculated using the vehicle speed and the battery temperature as variables, and the switching element 9 is turned on / off at the calculated duty to control the power supplied to the blower fan 5. The control circuit 2 can calculate the duty of the switching element 9 by the following function (1).
DUTY = PWM_r + C1 × vehicle speed + C2_mod × (battery temperature−T_r) (1)
However, in this equation (1), the sign is defined as follows.
PWM_r …… PWM reference value C1 ………… Vehicle speed constant C2 ……………… C2_mod is calculated as a reference value C3 ………… Battery temperature multiplier T_r …… Constant C2_mod = C2 + C3 ( Battery temperature-T_r)

  The duty calculated by this equation increases as the battery temperature increases and the vehicle speed increases. Therefore, when the battery temperature increases and the vehicle speed increases, the ON time of the switching element 9 increases and the fan of the blower fan 5 increases. The electric power supplied to the motor 8 is increased, and the blower fan 5 blows a large amount of cooling air to the battery of the battery unit 1. Therefore, the battery of the battery unit 1 is cooled more effectively. Therefore, the battery whose temperature has risen is efficiently cooled and the rise in temperature is restricted or the temperature is lowered. Further, when the vehicle speed increases, the rotation of the blower fan 5 increases and the noise level increases, but the noise level of the vehicle also increases and the noise of the blower fan 5 cannot be heard.

  The human ear has a unique phenomenon called the mask effect. The mask effect is a phenomenon in which the sensitivity of the ear that hears a specific sound is reduced by ambient noise. This phenomenon does not make it difficult to hear specific sounds sensuously because the noise is in the way. Noise reduces the sensitivity of the ears, so no matter how carefully you listen to a particular sound, it is a physiological phenomenon that you can't hear at all. That is, the sensitivity of the human ear is automatically adjusted according to the volume of sound entering the ear. When the level of the sound that enters the ear is the minimum, the ear sensitivity becomes the highest, and it becomes possible to hear a very small sound. However, as the sound entering the ear becomes louder, the ear automatically becomes less sensitive, making it impossible to hear small sounds. This state does not make it difficult to perceive emotionally or sensuously. If the sensitivity of the ear decreases, no matter how focused the sound is, the ability to listen to the ear decreases, so the listening ability of the ear is reduced. become unable. In particular, the closer the frequency of the sound that the ear wants to hear is to the frequency of the noise, the greater the effect that the specific sound is masked by the noise and cannot be heard. For this reason, if the frequency band of the road noise and wind noise generated by the automobile is close to the noise frequency band of the blower fan 5, the noise of the automobile masks the noise of the blower fan 5. The effect of making it inaudible increases, and the noise of the blower fan 5 cannot be heard. Automobiles become louder as speed increases. Therefore, when the vehicle speed increases and the noise of the automobile increases, the noise of the blower fan 5 does not become annoying even if the blower fan 5 rotates fast.

Further, when the engine speed of the automobile increases, the noise of the engine 10 increases. Further, when the automobile is in a normal traveling state, the transmission is in the top gear in many time zones. In this state, the vehicle speed increases in proportion to the engine speed. Therefore, when the engine speed increases, the vehicle speed increases and the noise of the automobile increases. For this reason, in the same way as calculating the duty with the battery temperature and the vehicle speed as variables, the battery temperature and the engine speed can be used as variables, that is, the vehicle speed can be replaced with the engine speed to calculate the duty. The control circuit 2 can calculate the duty by the following equation (2).
DUTY = PWM_r + C4 × engine speed + C2_mod × (battery temperature−T_r) (2)
However, in this equation (2), the sign is defined as follows.
PWM_r: PWM reference value C4 ......... Engine speed constant C2 ......... Reference value C3 for calculating C2_mod C3 ......... Multiplier of battery temperature T_r ......... Constant C2_mod = C2 + C3 (battery temperature -T_r)

  In this case, when the battery temperature increases and the engine speed increases, the duty increases. Therefore, when the battery temperature rises and the engine speed increases, the power supplied from the switching element 9 to the fan motor 8 increases, and the blower fan 5 sends a large amount of air to the battery to effectively cool the battery. At this time, although the noise of the blower fan 5 increases, the engine speed increases and the noise of the automobile also increases. Therefore, the noise of the blower fan 5 is masked by the noise of the automobile, making it difficult to hear. Noise is not harsh.

Furthermore, the control circuit 2 can also calculate a duty for switching the switching element 9 on and off using the battery temperature, the vehicle speed, and the engine speed as variables. The control circuit 2 can calculate the duty by the following equation (3).
DUTY = PWM_r + C1 × vehicle speed + C4 × engine speed + C2_mod × (battery temperature−T_r) (3)
However, in this equation (3), the sign is defined as follows. In this equation (3), C1 and C4 are not necessarily the same value as C1 in equation (1) and C4 in equation (2).
PWM_r ...... PWM reference value C1 ......... Vehicle speed constant C4 ......... Engine speed constant C2 ......... Reference value C3 for calculating C2_mod C ... Multiplier T_r ............ Constant C2_mod = C2 + C3 (battery temperature-T_r)

  In this case, when the battery temperature increases, the vehicle speed increases, and the engine speed increases, the duty increases. Therefore, when the battery temperature increases, the vehicle speed increases, and the engine speed increases, the power supplied from the switching element 9 to the fan motor 8 increases, and the blower fan 5 effectively blows a large amount of air to the battery. Cool down. At this time, the noise of the blower fan 5 increases, but the vehicle speed and engine speed increase, and the noise of the automobile also increases. Therefore, the noise of the blower fan 5 is masked by the noise of the automobile, making it difficult to hear. The noise of 5 will not be annoying.

  The control circuit 2 stores the temperature duty with respect to the battery temperature and the vehicle speed duty with respect to the vehicle speed in a storage circuit (not shown), and specifies the temperature duty and vehicle speed duty stored from the detected battery temperature and vehicle speed. The duty for turning on / off the switching element 9 for controlling the power supplied to the blower fan 5 can be changed by selecting either the temperature duty or the vehicle speed duty.

  FIG. 2 shows the temperature duty with respect to the battery temperature stored in the memory circuit of the control circuit 2, and FIG. 3 shows the vehicle speed duty. This control circuit 2 detects the temperature duty from the detected battery temperature, detects the vehicle speed duty from the vehicle speed, selects a large duty from the detected temperature duty and vehicle speed duty, and switches the switching element 9 of the blower fan 5 at the selected duty. Switch on / off.

  The control circuit 2 stores the temperature duty with respect to the battery temperature and the engine speed duty with respect to the engine speed in a storage circuit (not shown), and stores the temperature duty and engine stored from the detected battery temperature and engine speed. The duty for turning on / off the switching element 9 that controls the power supplied to the blower fan 5 can also be changed by specifying the rotation speed duty, selecting either the specified temperature duty or the vehicle speed duty.

  FIG. 4 shows the engine speed duty with respect to the engine speed stored in the storage circuit of the control circuit 2. This control circuit 2 detects the temperature duty based on the detected battery temperature based on FIG. 2, detects the engine speed duty based on the engine speed based on FIG. 4, and calculates a larger duty from the detected temperature duty and engine speed duty. The switching element 9 of the blower fan 5 is switched on and off at the selected duty.

  Furthermore, the control circuit 2 stores the temperature duty with respect to the battery temperature, the vehicle speed duty with respect to the vehicle speed, and the engine speed duty with respect to the engine speed in a storage circuit (not shown), and detects the detected battery temperature, vehicle speed, and engine. The stored temperature duty, vehicle speed duty, and engine speed duty are specified from the rotational speed, and any one of the specified temperature duty, vehicle speed duty, and engine speed duty is selected, and the power supplied to the blower fan 5 is determined. It is also possible to change the duty for turning on / off the switching element 9 to be controlled. The control circuit 2 detects the temperature duty, the vehicle speed duty, and the engine speed duty from the detected battery temperature, vehicle speed, and engine speed, selects the largest duty from the detected ones, and blows the fan at the selected duty. 5 is switched on and off.

The control circuit 2 controls the switching element 9 of the blower fan 5 and cools the battery of the battery unit 1 in the following steps shown in FIG.
[Step of n = 1]
The control circuit 2 detects the battery temperature of the battery unit 1.
[Step of n = 2]
The control circuit 2 detects a vehicle speed signal output from the vehicle control device 14 to detect the vehicle speed of the automobile.
[Steps n = 3, 4]
It is determined whether the battery temperature is higher than 25 ° C., which is the operating temperature of the blower fan 5. This flowchart shows a state where the blower fan 5 is operated when the battery temperature is higher than 25 ° C. When the battery temperature is not higher than 25 ° C., which is the operating temperature of the blower fan 5, that is, when the battery temperature is low, the switching element 9 of the blower fan 5 is turned off in a step of n = 4.
However, the battery temperature at which the blower fan 5 is operated can be changed at this step. For example, when the blower fan 5 is operated when the battery temperature is higher than 20 ° C., it is determined in this step whether the battery temperature is higher than 20 ° C., which is the operation temperature of the blower fan 5. The operating temperature of the blower fan 5 is set to 20 ° C., for example, when the outside air temperature is higher than the set temperature. When the power supply device is used in an environment where the outside air temperature is high, a sudden rise in battery temperature is expected. In such a case, the control circuit can change the battery temperature for operating the blower fan to be low. This control circuit detects not only the battery temperature but also the outside air temperature, compares this outside air temperature with the set temperature, and lowers the operating temperature of the blower fan when the outside air temperature is higher than the set temperature.
[Step n = 5]
The control circuit 2 calculates a PWM duty, that is, a duty for switching the switching element 9 of the blower fan 5 on and off from the battery temperature and the vehicle speed.
[Steps n = 6, 7]
It is determined whether or not the calculated fan duty is greater than the maximum limit value, and if it is greater than the maximum limit value, the maximum limit value is set. The maximum limit is 100%. When the maximum limit value is 100%, the switching element 9 is continuously turned on at the limit value with the highest duty. However, the maximum limit value can be 100% or less.
[Steps n = 8, 9]
It is determined whether or not the calculated fan duty is smaller than the lowest limit value. If the calculated duty is smaller than the lowest limit value, the lowest limit value is set. When the minimum limit value is 40%, the switching element 9 is switched on for 40% of one cycle and off for the remaining 60% at the limit value with the lowest duty. The minimum limit value can be 40% or less, or 40% or more.
[Step n = 10]
With the duty specified in the above steps, the blower fan 5 is operated with the switching element 9 switched on and off.

  The control circuit 2 controls the operation of the blower fan 5 by repeating the above steps n = 1 to 10 at a constant period, for example, 100 msec.

  The above control circuit 2 calculates the duty from the battery temperature and the vehicle speed and operates the blower fan 5. However, the control circuit 2 similarly calculates the duty from the battery temperature and the engine speed, and further calculates the battery. It is also possible to operate the blower fan 5 by calculating from the temperature, the vehicle speed, and the engine speed.

Further, the control circuit 2 can calculate the duty from the data stored in the storage circuit and control the operation of the blower fan 5 by the following steps shown in FIG.
[Step of n = 1]
The control circuit 2 detects the battery temperature of the battery unit 1.
[Step of n = 2]
The control circuit 2 detects a vehicle speed signal output from the vehicle control device 14 to detect the vehicle speed of the automobile.
[Steps n = 3, 4]
It is determined whether the battery temperature is higher than 25 ° C., which is the operating temperature of the blower fan 5. This flowchart shows a state where the blower fan 5 is operated when the battery temperature is higher than 25 ° C. The battery temperature at which the blower fan 5 is operated can be changed at this step. For example, when the blower fan 5 is operated when the battery temperature is higher than 20 ° C., it is determined in this step whether the battery temperature is higher than 20 ° C., which is the operation temperature of the blower fan 5. When the battery temperature is not higher than 25 ° C., which is the operating temperature of the blower fan 5, that is, when the battery temperature is low, the switching element 9 of the blower fan 5 is turned off in a step of n = 4.
[Steps n = 5, 6]
The control circuit 2 obtains the temperature duty from the battery temperature and the vehicle speed duty from the vehicle speed based on the data stored in the storage circuit.
[Step n = 7-9]
It is determined whether or not the vehicle speed duty is equal to or higher than the temperature duty. If the vehicle speed duty is equal to or higher than the temperature duty, the duty for operating the blower fan 5 by turning on / off the switching element 9 is defined as the vehicle speed duty. If the vehicle speed duty is not equal to or greater than the temperature duty, in other words, if the temperature duty is greater than the vehicle speed duty, the duty for operating the blower fan 5 is defined as the temperature duty.
[Step n = 10]
The blower fan 5 is operated with the duty specified in the above steps so as to switch the switching element 9 on and off.

  The control circuit 2 controls the operation of the blower fan 5 by repeating the above steps n = 1 to 10 at a constant period, for example, 100 msec.

It is a block diagram of the power supply device concerning one Example of this invention. It is a graph which shows an example of the temperature duty with respect to battery temperature. It is a graph which shows an example of the vehicle speed duty with respect to a vehicle speed. It is a graph which shows an example of the engine speed duty with respect to an engine speed. It is a flowchart which shows an example in which a control circuit controls the driving | operation of a ventilation fan. It is a flowchart which shows another example in which a control circuit controls the driving | operation of a ventilation fan.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Battery unit 2 ... Control circuit 3 ... Motor 4 ... Temperature sensor 5 ... Blower fan 6 ... Battery for electrical equipment 7 ... Fan 8 ... Fan motor 9 ... Switching element 10 ... Engine 11 ... Generator 12 ... Down converter 13 ... Wheel 14 ... Vehicle control device

Claims (9)

  1. A battery unit (1) having a plurality of batteries, a blower fan (5) for cooling the battery by forcibly blowing air to the battery unit (1), and a switching element for controlling power supplied to the blower fan (5) ( 9), and a control circuit (2) for controlling the power supplied to the blower fan (5) with the PWM pulse width by changing the fan duty for repeatedly turning on and off the switching element (9) at a predetermined cycle Power supply for
    In addition to detecting the battery temperature of the battery unit (1) by the temperature sensor (4), the control circuit (2) detects the vehicle speed signal output from the vehicle on which the power supply device is mounted, and determines the vehicle speed of the mounted vehicle. Detect and change the duty to turn on and off the switching element (9) using both the battery temperature and the vehicle speed as variables, and when the battery temperature of the battery unit (1) becomes higher or the vehicle speed becomes faster, the switching element (9) is turned on and off. The power supply device for vehicles which controls so that the electric power supplied to a ventilation fan (5) increases by increasing the duty to perform.
  2.   The control circuit (2) stores a function that calculates the duty to turn on and off the switching element (9) of the blower fan (5) using the battery temperature and vehicle speed as variables, and calculates the duty by detecting the vehicle speed and battery temperature. The vehicle power supply device according to claim 1, wherein the switching element (9) that controls the power supplied to the blower fan (5) is turned on / off with the calculated duty.
  3.   The control circuit (2) stores the temperature duty for the battery temperature and the vehicle speed duty for the vehicle speed, and selects either the temperature duty or the vehicle speed duty to control the power supplied to the blower fan (5). The power supply device for vehicles according to claim 1 which specifies duty which turns on and off element (9).
  4. A battery unit (1) having a plurality of batteries, a blower fan (5) for cooling the battery by forcibly blowing air to the battery unit (1), and a switching element for controlling power supplied to the blower fan (5) ( 9) and a control circuit (2) for controlling the power supplied to the blower fan (5) with the PWM pulse width by changing the fan duty for repeatedly turning on and off the switching element (9) at a predetermined cycle. Car power supply,
    In addition to detecting the battery temperature of the battery unit (1) by the temperature sensor (4), the control circuit (2) detects a rotation speed signal indicating the engine rotation speed of the vehicle on which the power supply device is mounted, and the mounted vehicle The engine speed of the battery unit is detected, and both the battery temperature and the engine speed are used as variables to change the duty for turning on and off the switching element (9), so that the battery temperature of the battery unit (1) increases or the engine speed of the vehicle A hybrid car power supply device that controls to increase the power supplied to the blower fan (5) by increasing the duty for turning on and off the switching element (9) as the number increases.
  5.   The control circuit (2) stores a function that calculates the duty to turn on and off the switching element (9) of the blower fan (5) using the battery temperature and engine speed as variables, and detects the battery temperature and engine speed. The hybrid vehicle power supply device according to claim 4, wherein the duty is calculated, and the switching element (9) for controlling the power supplied to the blower fan (5) is turned on / off at the calculated duty.
  6.   The control circuit (2) stores the temperature duty with respect to the battery temperature and the engine speed duty with respect to the engine speed, and selects either the temperature duty or the engine speed duty to supply the blower fan (5). The power supply device for a hybrid car according to claim 4, wherein a duty for turning on and off the switching element (9) for controlling the supplied power is specified.
  7. A battery unit (1) having a plurality of batteries, a blower fan (5) for cooling the battery by forcibly blowing air to the battery unit (1), and a switching element for controlling power supplied to the blower fan (5) ( 9) and a control circuit (2) for controlling the power supplied to the blower fan (5) with the PWM pulse width by changing the fan duty for repeatedly turning on and off the switching element (9) at a predetermined cycle. Car power supply,
    In addition to detecting the battery temperature of the battery unit (1) by the temperature sensor (4), the control circuit (2) detects the vehicle speed signal output from the vehicle equipped with the power supply and the engine speed signal indicating the engine speed. Detecting the vehicle speed and engine speed of the installed vehicle, changing the duty to turn on and off the switching element (9) with the battery temperature, vehicle speed and engine speed as variables, and the battery temperature of the battery unit (1) is high If the vehicle speed increases or the engine speed of the vehicle increases, the hybrid car is controlled so that the power supplied to the blower fan (5) increases by increasing the duty for turning on and off the switching element (9). Power supply.
  8.   The control circuit (2) stores a function that calculates the duty to turn on / off the switching element (9) of the blower fan (5) using the battery temperature, vehicle speed, and engine speed as variables, and the battery temperature, vehicle speed, and engine speed are stored. The hybrid vehicle power supply device according to claim 7, wherein the number is detected to calculate the duty, and the switching element (9) that controls the power supplied to the blower fan (5) is turned on / off with the calculated duty.
  9. The control circuit (2) stores the temperature duty with respect to the battery temperature, the vehicle speed duty with respect to the vehicle speed, and the engine speed duty with respect to the engine speed, and selects one of the temperature duty, the vehicle speed duty, and the engine speed duty. The hybrid vehicle power supply device according to claim 7, wherein the duty for turning on and off the switching element (9) for controlling the power supplied to the blower fan (5) is specified.
JP2003421994A 2003-12-19 2003-12-19 Power unit for vehicle, and power unit for hybrid car Pending JP2005184979A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003421994A JP2005184979A (en) 2003-12-19 2003-12-19 Power unit for vehicle, and power unit for hybrid car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003421994A JP2005184979A (en) 2003-12-19 2003-12-19 Power unit for vehicle, and power unit for hybrid car

Publications (1)

Publication Number Publication Date
JP2005184979A true JP2005184979A (en) 2005-07-07

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Family Applications (1)

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Country Link
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007086231A1 (en) 2006-01-27 2007-08-02 Toyota Jidosha Kabushiki Kaisha Cooling fan control device and method
EP2109178A1 (en) * 2008-04-10 2009-10-14 Peugeot Citroën Automobiles S.A. Method for controlling a device for thermal control of a battery supplying an electrically powered vehicle
JP2010146920A (en) * 2008-12-19 2010-07-01 Toyota Motor Corp Cooling device, vehicle loading the same, and control method for cooling device
JP2012019599A (en) * 2010-07-07 2012-01-26 Hitachi Ltd Driving device for rolling stock equipped with power storage device
KR101297005B1 (en) * 2010-12-16 2013-08-14 삼성에스디아이 주식회사 Apparatus and method for Battery temperature control
JP2013216173A (en) * 2012-04-06 2013-10-24 Suzuki Motor Corp Cooling fan control device
JP2014088160A (en) * 2012-10-04 2014-05-15 Toyota Industries Corp Drive device for hybrid vehicle
JP2014192129A (en) * 2013-03-28 2014-10-06 Toyota Motor Corp Battery temperature adjustment system
WO2014192424A1 (en) * 2013-05-30 2014-12-04 株式会社豊田自動織機 Hybrid vehicle drive device
CN109624677A (en) * 2018-12-21 2019-04-16 安徽江淮汽车集团股份有限公司 A kind of hybrid vehicle high-tension battery air cooling system blower control method

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007086231A1 (en) 2006-01-27 2007-08-02 Toyota Jidosha Kabushiki Kaisha Cooling fan control device and method
US8219248B2 (en) 2006-01-27 2012-07-10 Toyota Jidosha Kabushiki Kaisha Control device and control method for cooling fan
EP2109178A1 (en) * 2008-04-10 2009-10-14 Peugeot Citroën Automobiles S.A. Method for controlling a device for thermal control of a battery supplying an electrically powered vehicle
JP2010146920A (en) * 2008-12-19 2010-07-01 Toyota Motor Corp Cooling device, vehicle loading the same, and control method for cooling device
US8418789B2 (en) 2008-12-19 2013-04-16 Toyota Jidosha Kabushiki Kaisha Cooling system, vehicle equipped with the cooling system, and method for controlling the cooling system
JP2012019599A (en) * 2010-07-07 2012-01-26 Hitachi Ltd Driving device for rolling stock equipped with power storage device
US8900732B2 (en) 2010-12-16 2014-12-02 Samsung Sdi Co., Ltd. Apparatus and method for controlling temperature of battery
KR101297005B1 (en) * 2010-12-16 2013-08-14 삼성에스디아이 주식회사 Apparatus and method for Battery temperature control
JP2013216173A (en) * 2012-04-06 2013-10-24 Suzuki Motor Corp Cooling fan control device
JP2014088160A (en) * 2012-10-04 2014-05-15 Toyota Industries Corp Drive device for hybrid vehicle
JP2014192129A (en) * 2013-03-28 2014-10-06 Toyota Motor Corp Battery temperature adjustment system
WO2014192424A1 (en) * 2013-05-30 2014-12-04 株式会社豊田自動織機 Hybrid vehicle drive device
CN109624677A (en) * 2018-12-21 2019-04-16 安徽江淮汽车集团股份有限公司 A kind of hybrid vehicle high-tension battery air cooling system blower control method

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