JP5131119B2 - Battery cooling system for vehicles - Google Patents

Description

  The present invention relates to a vehicle battery cooling system, and more particularly to a vehicle battery cooling system for cooling a vehicle battery mounted on an electric vehicle.

  An electric vehicle is equipped with a large-capacity battery that stores a large amount of electricity in order to drive a motor that is a power source. Generally, a battery generates heat as it is charged / discharged due to internal resistance. Further, when the battery temperature is low, the charge / discharge efficiency is lowered, and when the battery temperature is high, the battery is deteriorated. Therefore, it is necessary to maintain the battery within a predetermined temperature range.

  The amount of heat generated by the battery due to charging / discharging depends on the amount of current charged / discharged. That is, when a large current is charged and discharged, the amount of heat generation increases. Therefore, during rapid charging in which charging is performed with a large current, the amount of heat generated by the battery is increased, and it is required to cool the battery in order to suppress deterioration of the battery.

  As an apparatus for maintaining the temperature of the battery in a predetermined temperature range when the battery is charged in this way, for example, an electric vehicle described in Patent Document 1 can be cited.

  The electric vehicle described in Patent Document 1 includes a power storage device, a temperature sensor, a cooling device (air conditioning device), a control device, and the like. When the power storage device is charged from a commercial power source (external power source) and the temperature of the power storage device measured by the temperature sensor is higher than a predetermined temperature, the control device for the electric vehicle stores power from the commercial power source. The charging to the device is stopped, and the cooling device is driven to cool the power storage device. When the temperature of the power storage device measured by the temperature sensor becomes equal to or lower than a predetermined temperature, charging is performed from the commercial power source to the power storage device, and the cooling device is stopped. That is, the control device of the electric vehicle controls charging of the power storage device and driving of the cooling device in a time-sharing manner according to the temperature of the power storage device.

Japanese Unexamined Patent Application Publication No. 2007-143370 (for example, description of paragraphs [0045] to [0053] of the specification, illustration of FIG. 1)

  In the technique described in Patent Document 1 described above, condensed water generated on the surface of the cooling device during charging is discharged to the ground. Charging a power storage device (battery) takes several tens of minutes to several hours, so by repeatedly charging at the same place, the condensed water discharged during charging becomes a puddle or mud, and charging work It will be in an unpreferable state as an environment to perform. In addition, there is a possibility that a puddle or mud is always generated in a parking lot or charging facility where charging is performed, which may cause discomfort to the owner of the vehicle and the manager of the parking lot or charging facility.

  Therefore, the present invention has been proposed in view of the above-described problems, and can condense condensed water generated on the surface of an air conditioner that is driven to cool the battery while the battery is being charged. Another object of the present invention is to provide a vehicle battery cooling system that can discharge the condensed water during traveling.

The vehicle battery cooling system according to the first invention for solving the above-described problem is
A vehicle battery cooling system for adjusting a temperature of a battery mounted on an electric vehicle to a predetermined temperature range by an air conditioner,
Drainage drain for discharging condensed water generated by the air conditioner;
A storage means for temporarily storing the condensed water discharged from the drainage drain;
Storage means, the upper is open ended trough, have a discharge portion for discharging the condensed water stored therein,
The discharge part is formed only on the rear side of the vehicle longitudinal direction center of the side wall constituting the tank .

A vehicle battery cooling system according to a second invention for solving the above-described problem is as follows.
A vehicle battery cooling system according to a first invention,
Discharge unit, characterized in that a groove provided in the side wall.

A vehicle battery cooling system according to a third invention for solving the above-described problem is
A vehicle battery cooling system according to a first invention,
Discharge portion, characterized in that it is a hole provided in the side wall.

A vehicle battery cooling system according to a fourth invention for solving the above-described problem is
A vehicle battery cooling system according to a first invention,
The storage means is arranged on the vehicle rear side of the front wheel of the vehicle.

  According to the vehicle battery cooling system of the present invention, the vehicle battery cooling system includes a storage unit that temporarily stores the condensed water discharged from the drainage drain, and the storage unit has a tank shape with an open top and is stored inside. By having the discharge unit that discharges the condensed water, the condensed water generated on the surface of the air conditioner that is driven to cool the battery can be stored in the storage means when the battery is charged. Thereby, in the place which charges a battery, generation | occurrence | production of the water pool and mud by condensed water is suppressed. Furthermore, when the vehicle is running, the condensed water stored in the storage means can be discharged from the discharge portion to the outside of the vehicle, so that the condensed water can be dispersed and discharged, and the generation of water pools and mud can be generated. It is suppressed.

  The best mode for carrying out the vehicle battery cooling system according to the present invention will be specifically described in each embodiment.

A first embodiment in which a vehicle battery cooling system according to the present invention is applied to an electric vehicle will be described with reference to FIG.
FIG. 1 is an explanatory diagram of a vehicle battery cooling system according to a first embodiment of the present invention. FIG. 1 (a) shows the entire system, and FIG. Shows an enlargement of In FIG. 1, the arrow line FR indicates the vehicle front direction, and the arrow line UP indicates the vehicle upward direction.

  As shown in FIG. 1A, a vehicle battery cooling system 100 according to this embodiment includes an air conditioner 101, a battery unit 110, a vehicle interior direction duct 102, a battery direction duct 103, a drainage drain 106, and a control device 120. (ECU).

  The air conditioning apparatus 101 is an apparatus that discharges air whose temperature has been adjusted. The air conditioner 101 is provided with a vehicle interior duct 102 and a battery duct 103 communicating with each other. The other end of the vehicle interior direction duct 102 communicates with a vehicle interior (not shown). The other end of the battery direction duct 103 communicates with the battery chamber 104. Open / close valves V1 and V2 are arranged in the vehicle interior direction duct 102 and the battery direction duct 103, respectively. The air conditioner 101 is provided with a drainage drain 106 in communication therewith.

  A battery unit 110 is disposed in the battery chamber 104. The battery unit 110 includes a plurality of batteries 111. The battery chamber 104 is provided with an exhaust duct 105 communicating with the upper part on the vehicle rear side. A temperature sensor 112 that detects the temperature of the battery 111 is disposed in the battery chamber 104.

  Temperature data of the battery 111 detected by the temperature sensor 112 is input to the control device 120. The control device 120 is a device that controls the operation of the air conditioner 101, the open / close state of the open / close valves V1, V2, and the like.

  Reference numeral 131 denotes a power connector provided in the vehicle 130, reference numeral 132 denotes a power cable connecting the power connector 131 and the battery unit 110, and reference numeral G denotes the ground.

  Here, when charging the battery 111 mounted on the vehicle 130, the connection cable 11 of the external power source 10 is connected to the power connector 131 of the vehicle 130. As a result, the battery 111 is charged from the external power supply 10 via the connection cable 11, the power connector 131, and the power cable 132.

  At this time, the temperature sensor 112 transmits the detected temperature data to the control device 120. The control device 120 controls the open / close valves V1 and V2 and the air conditioner 101 based on the input temperature data. That is, when the input temperature data is a high temperature exceeding a predetermined temperature range, the on-off valve V1 is closed while the on-off valve V2 is opened. The air whose temperature is adjusted by the air conditioner 101 is supplied to the battery chamber 104 through the battery direction duct 103. Thereby, the battery 111 is maintained at a predetermined temperature.

  As shown in FIGS. 1A and 1B, a condensed water storage tank 150 (storage means) for temporarily storing condensed water W is located below the drain outlet 106a of the drain drain 106 described above. Provided. The condensate storage tank 150 has a tank shape with an open top, and includes a bottom plate 151 and four side walls 152, 153, 154, and 155. The side wall 152 is connected to the front side in the vehicle front-rear direction of the bottom plate 151 and is formed to extend upward. The side wall 153 is connected to the rear side of the bottom plate 151 in the front-rear direction of the vehicle and extends upward. The side wall 154 is connected to one side of the bottom plate 151 in the vehicle width direction, extends upward, and is connected to the side walls 151 and 152. The side wall 155 is connected to the other side of the bottom plate 151 in the vehicle width direction, extends upward, and is connected to the side walls 151 and 152. Arc-shaped grooves 156 and 157 (discharge portions) are formed in the upper portions of the side walls 154 and 155, respectively. The height H1 of the side wall 154 and the height H2 of the side wall 155 are the same. The depth D1 of the groove 156 and the depth D2 of the groove 157 are formed to be the same. The depth D1 of the groove 156 and the depth D2 of the groove 157 are formed smaller than the heights H1 and H2 of the side walls 154 and 155.

  As described above, the condensed water W can be temporarily stored in the condensed water storage tank 150 by making the depths D1, D2 of the grooves 156, 157 smaller than the heights H1, H2 of the side walls 154, 155. Furthermore, when the vehicle 130 travels on a curve or the like and gravity in the width direction of the vehicle 130 is given to the vehicle 130, the condensed water stored in the condensed water storage tank 150 flows from the grooves 156 and 157 to the vehicle 130. Discharged to the outside.

  Therefore, according to the vehicle battery cooling system 100 according to the present embodiment, the condensate water storage tank 150 that temporarily stores the condensate water W discharged from the drainage drain 106 is provided. The air conditioner 101 that is driven to cool the battery 111 when the battery 111 is being charged by having the grooves 156 and 157 that discharge the condensed water stored inside. The condensed water generated on the surface of the water can be stored in the condensed water storage tank 150. Thereby, in a place (a parking lot, a charging facility, etc.) where the battery 111 is charged, generation of a puddle or mud due to condensed water is suppressed. Further, when the vehicle 130 travels on a road curve or the like and the vehicle 130 is subjected to gravity in the width direction of the vehicle 130, the condensed water stored in the condensed water storage tank 150 is discharged from the grooves 156 and 157 to the outside of the vehicle. can do. The condensed water storage tank 150 itself is simple, and an increase in cost can be suppressed.

  Furthermore, by adjusting the depths D1 and D2 of the grooves 156 and 157 formed in the condensed water storage tank 150, the amount of condensed water that can be stored in the condensed water storage tank 150 can be adjusted.

  By disposing the condensed water storage tank 150 on the rear side of the front wheel FW of the vehicle 130, attachment and maintenance can be performed relatively easily.

[Other Examples]
In the said Example, although demonstrated using the vehicle battery cooling system 100 which comprises the condensed water storage tank 150 which provided the circular-arc-shaped groove | channels 156,157 in the upper part of the side walls 154,155 as a discharge part, condensed water storage It is also possible to make the discharge part of the tank into a shape other than the arc-shaped groove. For example, as shown in FIG. 2, elliptical holes 256 and 257 may be provided in the side walls 154 and 155 of the condensed water storage tank 250, respectively. Specifically, the condensed water is provided with an elliptical hole 256 at the position of the height H3 (<H1) of the side wall 154 and an elliptical hole 257 at the position of the height H4 (<H2) of the side wall 155. The vehicle battery cooling system 200 including the storage tank 250 may be used.

  Moreover, although demonstrated using the vehicle battery cooling system 100 which comprises the condensed water storage tank 150 which formed the depth D1 of the groove | channel 156, and the depth D2 of the groove | channel 157 in the same magnitude | size, the depth of these grooves is It is also possible to provide a vehicular battery cooling system including a condensed water storage tank made different. Although described using the vehicle battery cooling system 100 including the condensate water storage tank 150 in which the two grooves 156 and 157 are formed, the condensate water storage tank in which one groove or three or more grooves are formed is provided. It is also possible to provide a vehicle battery cooling system.

  As described above, the shape, the number, and the formation position of the discharge unit are arbitrary, and can be changed as appropriate according to the amount of condensed water discharged on the surface of the air conditioner that is driven to cool the battery. . Even such a vehicle battery cooling system has the same effects as the vehicle battery cooling system 100 according to the first embodiment described above.

  The battery cooling system for a vehicle according to the present invention is capable of accumulating condensed water generated on the surface of an air conditioner that is driven to cool the battery while charging the battery, and the condensed water during traveling. Can be used extremely beneficially in the automobile industry and the like.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the battery cooling system for vehicles which concerns on 1st Example of this invention, FIG. 1 (a) shows the whole, FIG.1 (b) shows the expansion of the condensed water storage tank which it comprises. . It is explanatory drawing of the other example of the condensed water storage tank which the battery cooling system for vehicles which concerns on 1st Example of this invention comprises, Fig.2 (a) shows the whole battery cooling system for vehicles, FIG. The expansion of the condensed water storage tank which it comprises is shown in b).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 External power supply 11 Connection cable 100, 200 Battery cooling system for vehicles 101 Air conditioning apparatus 102 Car interior direction duct 103 Battery direction duct 104 Battery room 105 Exhaust duct 106 Drain drain 110 Battery unit 111 Battery 112 Temperature sensor 120 Control apparatus (ECU)
150,250 Condensed water storage tanks 156,157 Groove 256,257 Hole FW Front wheel W Condensed water

Claims (4)

A vehicle battery cooling system for adjusting a temperature of a battery mounted on an electric vehicle to a predetermined temperature range by an air conditioner,
A drainage drain for discharging condensed water generated by the air conditioner;
A storage means for temporarily storing the condensed water discharged from the drainage drain;
The storing means, the upper is open ended trough, have a discharge portion for discharging the condensed water stored therein,
The vehicle battery cooling system according to claim 1, wherein the discharge portion is formed only on a rear side of a vehicle front-rear direction center of a side wall constituting the tank . The vehicle battery cooling system according to claim 1,
Vehicle battery cooling system, wherein the discharge portion is a groove provided in the side wall. The vehicle battery cooling system according to claim 1,
Vehicle battery cooling system, wherein the discharge section is a hole provided in the side wall. The vehicle battery cooling system according to claim 1,
The battery cooling system for vehicles, wherein the storage means is disposed on the vehicle rear side of the front wheels of the vehicle.

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