Cooling device of rechargeable battery for vehicle

Abstract

To provide a cooling device of a rechargeable battery for a vehicle which makes it possible to radiate higher heat loss even when temperature in outside air becomes higher and can cool a rechargeable battery under upper limit temperature or less.SOLUTION: A cooling device of a rechargeable battery for a vehicle includes a rechargeable battery which is provided on the vehicle on which a user rides and supplies electrical power to equipment installed on the vehicle, a heat exchanger which cools refrigerant carrier after cooling the rechargeable battery, an intake port which sucks air within a cabin on which a user in the vehicle rides and an air duct which introduces the air sucked from the intake port to the heat exchanger.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] An embodiment of the present invention relates to a cooling device for a vehicle storage battery. [Background technology]

[0002] Conventional vehicle battery cooling devices have a heat sink on the bottom of the battery that allows a refrigerant to flow inside. By connecting the battery to the heat sink, the heat generated by the battery is absorbed by the refrigerant in the heat sink, and the heat of the refrigerant is transferred to the heat exchanger. In the heat exchanger, the outside air is used to cool the refrigerant. was used.

[0003] In recent years, from the perspective of equipment design taking into account global warming, the maximum outdoor temperature has been set in standards, etc. The upper allowable operating temperature for batteries is 55°C to 60°C. When the battery is required to be operated in a way that increases its heat loss, the conventional technology of using air In the case of using a heat exchanger, the battery's upper limit temperature will be reached and the design will not be viable. For example, If the upper limit of the battery operating temperature is 55°C and the maximum ambient temperature is 43°C, the allowable temperature rise is The temperature is ΔT = 12K. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2018 / 051393 Summary of the Invention [Problem to be solved by the invention]

[0005] The problem to be solved by the present invention is to provide a device capable of dissipating higher heat loss even when the outside air temperature is high. The present invention provides a cooling device for a vehicle storage battery that can cool the storage battery to a temperature below the upper operating limit temperature. The purpose is to provide. [Means for solving the problem]

[0006] The vehicle storage battery cooling device of this embodiment is provided in a vehicle in which a user rides, a storage battery that supplies power to the equipment mounted on the vehicle and a refrigerant that cools the storage battery a heat exchanger; an intake port for taking in air from within a vehicle cabin in which a user of the vehicle is seated; and a ventilation duct that guides the air taken in through the inlet to the heat exchanger. [Brief description of the drawings]

[0007] [Figure 1] 1 is a configuration diagram of a cooling device for a vehicle storage battery according to a first embodiment. [Diagram 2] 1 is a diagram showing an example of a power storage module constituting a vehicle storage battery according to an embodiment; [Diagram 3] 1 is a configuration diagram of a vehicle storage battery according to an embodiment; [Figure 4] FIG. 6 is a configuration diagram of a cooling device for a vehicle storage battery according to a second embodiment. [Diagram 5] FIG. 11 is a configuration diagram of a cooling device for a vehicle storage battery according to a modified example of the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment for carrying out the invention will be described.

[0009] (First embodiment) A cooling device for a vehicle storage battery according to a first embodiment will be described with reference to FIG.

[0010] FIG. 1 is a configuration diagram of a cooling device for a vehicle storage battery.

[0011] The cooling device for the vehicle storage battery is a cooling device for the electric motor that drives the vehicle and the inverter that is the main circuit system. The storage battery 1 supplies power to the converter, the vehicle air conditioning, the lighting, and the auxiliary equipment, and when the The door pocket 2 stores the air, and the intake port 3 is provided at the top of the door pocket 2. The intake port 3 is used to receive the air from the vehicle. A fan 4 takes in air from the vehicle interior that has been cooled by an air conditioner. a heat exchanger 5 that uses the refrigerant to cool the refrigerant; and a cooling unit that uses the refrigerant to cool the storage battery 1. , has.

[0012] The cooling unit includes a tank 25 for storing the refrigerant cooled by the heat exchanger, and a A pump 26 that sends the stored refrigerant to the heat sink 20 and a heater that is in contact with the bottom surface of the storage battery 1 The heat sink cools the storage battery 1 by the coolant sent from the pump 26 flowing inside the heat sink. 20 and.

[0013] The storage battery 1 is mounted on a railway vehicle or the like, and is connected to an electric motor (not shown), an inverter (not shown) which is a main circuit system, and It is used as a power source to supply power to the inverter, converter, air conditioning, lighting, and auxiliary equipment. As shown in FIG. 2, the storage battery 1 includes a lower case 11, a battery cell 12, an inner lid 13, and a battery A bar 14, a fixing member 15, and a CMU (Cell Monitoring Unit) 16 which is a monitoring board. , and a top plate 17.

[0014] The storage battery 1 has a plurality of battery cells 12 connected in series and parallel to a bus bar 14 so as to obtain a desired power. The battery is equipped with a group of cells connected by a wire. The health of these batteries and their current voltage and current values ​​are also recorded. It is housed in a plastic case together with the CMU16 that monitors the main circuit and communication cables. There are also departments etc.

[0015] Each battery cell 12 is roughly a rectangular parallelepiped, and a positive terminal 18 and a negative terminal 19 are provided at the top. The side case 11 houses a plurality of battery cells 12. The inner lid 13 is a positive terminal of the battery cell 12. The negative electrode terminal 19 and the positive electrode terminal 20 have openings.

[0016] The bus bar 14 electrically connects the positive terminal 18 and the negative terminal 19 of the battery cell 12. The fixing member 15 fixes the bus bar 14. The CMU 16 is disposed on the upper part of the battery cell 12. The top plate 17 is fitted with the lower case 11 to form a housing for the storage module. The housing houses the housing 12, the inner cover 13, the bus bar 14, the fixing member 15, and the CMU 16.

[0017] The CMU 16 is connected to the battery cell 12 and detects the voltage and temperature of the battery cell 12. The battery management unit (BMU) (not shown) acquires the information and The BMU sends information about the energy storage module to the power storage unit (BMU). The contactor installed between the power supply and the main circuit is controlled to electrically open and close the main circuit and the energy storage module.

[0018] As shown in FIG. 3, a plurality of storage batteries 1 are arranged on a heat sink 20. The positive and negative terminals 18 and 19 of the adjacent storage batteries 1 are connected together to obtain the desired total current and voltage. The batteries 1 and the heat sink 20 are connected in series and parallel with each other by wiring 21. The heat sink 20 is provided in multiple stages. In FIG. 3, an example in which the heat sink 20 has three stages is shown.

[0019] The heat sink 20 is made of, for example, aluminum, which has high thermal conductivity. A pipe through which a coolant flows is embedded in the heat sink 20. The coolant flows through the heat sink 20. The heat sink 20 cools the storage battery 1 by the heat of the portion in contact with the storage battery 1. Any material with high conductivity will do, and it is not limited to aluminum, but can be made of copper or stainless steel alloy, etc. That's fine.

[0020] The plurality of storage batteries 1 are arranged on a heat sink 20 and housed in a sealed box 22. As shown in FIG. 1, the storage battery 22 is mounted under the floor of the vehicle. The storage battery 1 is mounted outside the vehicle cabin. It may be provided under the floor of the vehicle or mounted on the roof of the vehicle.

[0021] The door pocket 2 is provided on the side of the railway vehicle and is a space in which the door is stored when the vehicle door is open. The door pocket 2 functions as a ventilation duct when the door is closed. Therefore, the space of the door pocket 2 where the door does not exist is used as a ventilation duct to take in air from inside the vehicle. is possible.

[0022] The air intake 3 is provided at the upper part of the door pocket 2 on the interior side of the vehicle. The louvered air intake 3 is a louvered air intake 3. In addition, when paper or a flat object is sucked in, the intake port 3 is prevented from being completely sealed. This can be done.

[0023] The air in the vehicle cabin is taken in through the louvered air intake 3, passes through the door pocket 2, and enters the vehicle. The hood 40 is installed under the floor. Inside the hood 40, there is a heat exchanger 5 and a fan 4. When the fan 4 rotates, air in the vehicle cabin is sucked through the intake 3, The exhaust passes through the door pocket 2, the hood 40, and the heat exchanger 5 and is exhausted from under the floor.

[0024] Since dust 23 remains under the floor of the passenger compartment of the railroad car, the air inside the car is Instead of taking in air from the inside of the vehicle, the air is taken in through the louvered intake 3 located at the top of the vehicle interior. do.

[0025] As mentioned above, the fan 4 is driven by the air conditioner through the louvered intake 3. The air inside the vehicle compartment that has been cooled by the air conditioner is drawn into the door pocket 2, thereby creating a flow of cooling air 24.

[0026] The heat exchanger 5 is disposed under the floor of the vehicle and converts the heat of the storage battery 1 into heat. The medium is cooled by using the air in the vehicle compartment that passes through the door pocket 2.

[0027] The cooling unit includes a heat sink 20, a tank 25, and a pump 26. The storage battery 1 is cooled using the refrigerant cooled by the converter 5. The tank 25 and the pump 26 are The pump 26 and the heat sink 20 are connected by a pipe 27, and the pump 26 and the heat sink 20 are connected by a second pipe 28. The heat sink 20 and the heat exchanger 5 are connected by a third pipe 29, and the heat exchanger 5 and the tank The pipe 25 is connected by a fourth pipe 30.

[0028] In the cooling unit, the refrigerant cooled by the air in the vehicle compartment flowing in from the heat exchanger 5 is The liquid is circulated through the tank 25, the pump 26, and the heat sink 20 in that order. The bottom surface of the battery 1 is in contact with the battery 1, and the battery 1 is cooled using a refrigerant. The refrigerant is sent to the heat exchanger 5 .

[0029] In the vehicle battery cooling device configured as described above, the air conditioner is installed on the roof or It is installed under the floor, and temperature-controlled air is circulated inside the vehicle where passengers are riding. The temperature-controlled air in the vehicle cabin is blown through the louvers at the top of the door pocket 2 by the fan 4. The temperature-controlled air in the vehicle interior is drawn into the upper part of the door pocket 2. The louvered intake 3 is passed through the door pocket 2 and into the hood 40 installed under the floor. The heat exchanger 5 in the

[0030] The air drawn into the vehicle interior by the fan 4 reaches the heat exchanger 5 and is circulated through the heat sink 20 The refrigerant flows through the inside of the battery 1 and cools the battery 1. The coolant circulates through the tank 25, the pump 26, and the heat sink 20 in that order, cooling the storage battery 1 again.

[0031] As a result, the battery 1 can be cooled by the low temperature of the vehicle interior cooled by the air conditioning rather than by the outside air. Since it is possible to cool it with air, the high heat loss of the storage battery 1 can be dissipated, improving the cooling performance. In addition, the air inside the vehicle is cleaner than the current air outside the vehicle, so the heat It is also possible to reduce clogging of the exchanger 5.

[0032] In general, when a train is stopped at a station, the doors are open and stored in the door pocket 2. Therefore, it may not be possible to use the door pocket 2 as a ventilation duct, but it is possible to use the door pocket 2 as a ventilation duct. In order to maintain this, the doors are closed when the train is stopped at a station and opened and closed only when passengers need to get off and board. By operating it in this way, it is possible to take in air from inside the vehicle cabin.

[0033] For example, when a partial overhead line-less train is stopped at a station and the battery 1 is rapidly charged, the temperature rises Therefore, the vehicle doors should be closed and the air in the vehicle should be kept at a temperature controlled level by the air conditioning system. By adopting this, it is possible to reduce the temperature rise of the storage battery 1 due to quick charging.

[0034] Second Embodiment A cooling device for a vehicle storage battery according to a second embodiment will be described with reference to FIGS.

[0035] FIG. 4 is a configuration diagram of a cooling device for a vehicle storage battery.

[0036] Regarding each part of the second embodiment, the cooling device for the vehicle storage battery of the first embodiment shown in FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed explanations thereof will be omitted. In the ventilation duct between the louvered intake 3 and the heat exchanger 5, A dust filter 31 is provided.

[0037] In FIG. 4, the dust filter 31 is provided at the louvered air intake 3 to filter out dust from the inside of the vehicle. 23 from entering the heat exchanger 5. The temperature-controlled air in the vehicle interior is blown by the fan 4. The louvered air intake 3 is provided with a dust filter 31. The dust filter 31 captures dust 23 contained in the air in the vehicle cabin. Therefore, the air in the vehicle cabin is purified and then passes through the door pocket 2 into the heat exchanger 5 installed under the floor. will be done.

[0038] With the above-mentioned configuration, the dustproof louvered air intake 3 provided at the top of the door pocket 2 is provided. The air in the vehicle interior is drawn into the heat exchanger 5 through the filter 31, so that the heat exchanger 5 is prevented from attracting dust 23. This prevents the device from being soiled by the dirt.

[0039] Next, a modified example of the second embodiment will be described with reference to FIG. FIG. 2 is a configuration diagram of a cooling device.

[0040] Regarding each part of the modified example of the second embodiment, the vehicle storage battery of the second embodiment shown in FIG. The same parts as those of the cooling device are denoted by the same reference numerals, and detailed explanations are omitted. In the modified embodiment, the dustproof filter 31 is provided on the downstream side of the door pocket 2 of the hood 4. In FIG. 5, a dust filter 31 is provided in front of the heat exchanger 5 to prevent dust 23 from entering the vehicle cabin. This prevents the heat from entering the heat exchanger 5.

[0041] Temperature-controlled air from the vehicle interior is drawn in by fan 4 and passed through the louvered intake The air in the vehicle compartment that enters through the louvered air intake 3 passes through the door pocket 2. The dust filter 31 provided in the hood 40 on the downstream side of the door pocket 2 prevents the air in the vehicle interior from entering through the door pocket 2. Since the dust particles 23 contained in the air are trapped, the air in the vehicle interior is sent to the heat exchanger 5 in a cleaner state. can be done.

[0042] With the above-mentioned configuration, the limited depth direction space of the door pocket 2 is reduced compared to the embodiment shown in FIG. Therefore, the air resistance is smaller than when the louvered air intake 3 is equipped with a dust filter 31. By sending less air from within the vehicle cabin to the heat exchanger 5, the cooling efficiency is improved.

[0043] On the other hand, since the dust filter 31 is provided under the floor, the dust prevention is improved compared to the second embodiment. Although it takes time to replace the dust filter 31, it is preferable to install it under the floor from the viewpoint of cooling efficiency. It is.

[0044] Although several embodiments of the present invention have been described, these embodiments are presented by way of example only. These novel embodiments are not intended to limit the scope of the invention. The present invention can be embodied in various forms, and various modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are within the scope of the invention. The invention is included in the summary and in the scope of the claims and their equivalents. . [Explanation of symbols]

[0045] 1. Storage battery 2...Door pocket (ventilation duct) 3…Air intake 4. Fan 5...Heat exchanger 31...Dust filter

Claims

1. A storage battery that is installed in a vehicle in which a user rides and supplies power to devices mounted on the vehicle and, a heat exchanger that cools the refrigerant after cooling the storage battery; an air intake for taking in air into a vehicle cabin in which a user of the vehicle rides; a ventilation duct that guides the air taken in through the intake port to the heat exchanger; A cooling device for a vehicle storage battery having the above structure.

2. The storage battery is provided outside the vehicle compartment, The ventilation duct is a door pocket in which the vehicle door is stored when the door is open. The vehicle storage battery cooling device according to claim 1 .

3. a fan that draws air into the vehicle cabin through the ventilation duct; The vehicle storage battery cooling device according to claim 1 .

4. The air intake is provided in an upper portion of the door pocket and has a rout for guiding air in the vehicle interior into the door pocket. It is a bar-processed intake port. The vehicle storage battery cooling device according to claim 2 .

5. A dust filter is provided in the ventilation duct between the intake port and the heat exchanger. R, The vehicle storage battery cooling device according to claim 1 .

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