JPH10162867A - Battery mount structure, and battery temperature adjusting method for electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve high efficiency in temperature adjustment for a battery, and simplify it in a mount structure for a battery as a power source for a motor to drive a vehicle. SOLUTION: A battery 5 is mounted on a duct harness 17 installed in a battery pack comprising a lower cover 11 and an upper cover 13, a power terminal 49 and a control terminal 51 on a lower surface of the battery 5 are connected to pin terminals 53, 55 on the duct harness 17 to form continuity. Pin terminals 51 to each other and the pin terminals 53 to each other are connected by electric wiring integrally moulded in the duct harness 17 to be extended t the external by power output wiring 65 and control output wiring 67. A temperature adjusting passage is formed inside the dust harness 17, and the temperature is controlled by an air conditioning unit 19 comprising a first heat exchanger and a blower fan 43 connected to pipings of a freezer cycle for cooling and heating in a cabin for circulation inside through a guide port 37, above temperature adjusting passage, and a supply port 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery mounting structure of an electric vehicle for mounting a battery serving as a power source of a traveling motor on a vehicle, and a method of adjusting the temperature of the battery. About.

[0002]

SUMMARY OF THE INVENTION The present invention provides a structure for mounting a battery, which is a power source of a traction motor in an electric vehicle, on a vehicle so that the temperature of the battery can be efficiently adjusted and simplified. It is intended to be something.

[0003]

In order to achieve the above-mentioned object, the present invention firstly provides a battery case which is mounted on a vehicle and is capable of substantially closing the inside of the battery case. And an air conditioning unit for adjusting the temperature of the battery by circulating temperature-controlled air in the battery case.

[0004] According to the above configuration, the temperature-controlled air from the air conditioning unit circulates in the battery case, and the temperature of the battery is adjusted efficiently.

[0005] Secondly, a temperature control air guide member in which a battery is placed through a predetermined gap is accommodated in a battery case, and the temperature control air guide member is provided with a temperature control air supplied from an air conditioning unit. And a supply port for supplying the temperature-controlled air guided downward from the mounting portion to the lower surface side of the battery from the mounting portion of the battery. .

According to the above configuration, the temperature-controlled air from the air conditioning unit is guided from the guide port to a position below the mounting portion of the temperature-controlled air guide member on which the battery is mounted, and then passes through the supply port. The battery is supplied to the lower surface to adjust the temperature of the battery.

Third, the temperature control air guide member itself has a temperature control air passage through which the temperature control air guided below the mounting portion from the guide port passes.

[0008] According to the above configuration, the temperature-controlled air from the air conditioning unit is guided from the guide port to the temperature-controlled air passage below the mounting portion on which the battery of the temperature-controlled air guide member is mounted. And supplied to the lower surface of the battery to adjust the temperature of the battery.

Fourth, a plurality of batteries are arranged along the flow of the temperature-controlled wind, and the supply port is formed to have a larger opening area toward the downstream side of the flow of the temperature-controlled wind.

[0010] According to the above configuration, since the temperature of the temperature-controlled wind changes from the initial temperature toward the downstream side, the temperature control effect tends to be weakened by increasing the opening area of the supply port toward the downstream side. The temperature control of the battery on the downstream side is also optimized, and uniform temperature control of each battery becomes possible.

Fifthly, an electrode terminal is provided on the bottom of the battery, and the temperature control air guide member is connected to the electric wiring to the outside by fitting the electrode terminal by mounting the battery. Connector part.

According to the above configuration, the electrode terminal portion is connected to the connector portion of the temperature control wind guide member only by mounting the battery on the temperature control wind guide member.

Sixth, the connector section is provided with a pair for power supply and a pair for control. The connector section is connected to a temperature control air guide member between the control connector sections, and the individual battery sections are connected. A cell controller provided with a function for checking the voltage value and temperature of the cell is provided.

According to the above configuration, the voltage value and the temperature of each battery are checked by the self-controller provided on the temperature control wind guide member.

Seventh, the air-conditioning unit includes a heat exchanger and a blower, and also constitutes a part of a refrigeration cycle capable of performing a cooling and heating operation by circulating a refrigerant. A heat exchanger for performing the heat treatment.

According to the above configuration, when the air conditioning unit necessary for controlling the temperature of the battery is provided, the refrigeration cycle for performing the cooling and heating operation in the vehicle compartment is also used. Double installation is suppressed.

Eighth, the air conditioning unit provided in the battery case controls the temperature of the battery, which is housed and fixed in a battery case which is mounted on the vehicle and which can be substantially sealed, and which serves as a power source for the traveling motor. To adjust the temperature by supplying the battery temperature.

According to the battery temperature control method, since the air conditioning unit for controlling the temperature of the battery is provided in the battery case, the air intake and exhaust ducts for temperature control and the fan structure are complicated. Is avoided.

[0019]

According to the first aspect of the present invention, since the temperature-controlled air from the air conditioning unit is circulated in the sealed battery case, the air intake and exhaust ducts and the fan structure are complicated. Can be avoided, the battery mounting structure can be simplified, the productivity can be improved, and the temperature of the battery can be controlled efficiently, and the battery life can be prolonged. .
In addition, since the battery case has a sealed structure, the watertightness of the battery is improved.

According to the second aspect of the invention, the temperature-controlled air flows from the guide port of the temperature-controlled air guide member below the battery mounting portion,
Since the battery is supplied from the supply port to the lower surface of the battery, the temperature of the battery can be more efficiently controlled.

According to the third invention, the temperature control wind guide member is
Since the temperature control wind passage through which the temperature control wind guided from the guide portion to the lower side of the mounting portion passes is provided by itself, the temperature control wind can be reliably supplied to the lower surface of the battery, and the temperature control effect of the battery is improved. It can be further improved.

According to the fourth aspect of the present invention, by increasing the opening area of the supply port of the temperature control air guide member which opens on the lower surface of the battery toward the downstream side, the batteries arranged in plural along the flow of the temperature control air can be used. Even when the temperature of the temperature-controlled wind changes from the initial temperature toward the downstream side, the temperature can be uniformly controlled for each battery.

According to the fifth aspect of the present invention, the electrode terminal portion is connected to the connector portion of the temperature control air guide member only by mounting the battery on the temperature control air guide member. This simplifies the mounting work, and improves the productivity.

According to the sixth aspect, the cell controller having a function of checking the voltage value and the temperature of each battery is provided on the temperature control wind guide member between the connector portions, so that the space in the battery case is provided. Can be effectively used, and the battery mounting structure can be made compact.

According to the seventh aspect of the present invention, when the air conditioning unit required for controlling the temperature of the battery is provided, the air conditioning unit is also configured to serve also as a refrigeration cycle capable of performing a cooling and heating operation in the vehicle compartment. Can be suppressed, and the configuration can be simplified.

According to the eighth aspect, the temperature-controlled air from the air-conditioning unit is supplied to the battery in the sealed battery case, so that the structure of each duct for intake and exhaust of air and the structure of the fan is reduced. This can be avoided, the simplification of the structure for mounting the battery can be achieved, the productivity can be improved, and the temperature of the battery can be controlled efficiently.

[0027]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of various components in a battery mounting structure of an electric vehicle according to an embodiment of the present invention.
As shown in FIG. 1, the battery pack 3 is attached to the lower surface of the floor of the electric vehicle 1. The battery 5 shown in FIG. 1 housed and fixed in the battery pack 3 is
It is a power source for driving the traveling motor 9 housed in the motor room 7 at the front of the vehicle 1.

The battery pack 3, as shown in FIG.
A control box 15 including a circuit for controlling a high-current system such as supplying seven batteries 5 and a driving current from the batteries 5 to the traveling motor 9 in a battery case including the lower cover 11 and the upper cover 13; A duct harness 17 as a temperature control wind guide member on which the battery 5 and the control box 15 are placed, and an air conditioning unit 19 attached to the duct harness 17 are stored.

In FIG. 1, the arrow F direction is the vehicle front side and the R direction is the vehicle rear side.
A series mounting portion 21 on which three batteries 5 are mounted in series along the vehicle front-rear direction, and four batteries 5 along the vehicle width direction which are located on the rear end side of the series mounting portion 21 in the vehicle. A parallel mounting portion 23 that is mounted in parallel with one another, an air conditioning unit mounting portion 25 that is located on the vehicle front end side of the serial mounting portion 21 and to which the air conditioning unit 19 is mounted, and one of the serial mounting portions 21. It is formed integrally with a resin molded product having a control box mounting portion 27 formed on a side portion and on which the control box 15 is mounted.

The lower cover 11 is provided with a rear enlarged portion 11a corresponding to the parallel mounting portion 23 and a side protruding portion 11b corresponding to the control box mounting portion 27 in accordance with the shape of the duct harness 17 described above. It is formed in a concave shape. Regarding the upper cover 13 as well,
And a side protruding portion 13b corresponding to the control box mounting portion 27, and is formed in a concave shape as a whole. The above-mentioned lower cover 11 and upper cover 13 have openings facing each other, and are fixed using bolts and nuts or the like using the fixing portion 11c and the flange fixing portion 13c, and the inside is sealed.

The series mounting portion 21 and the parallel mounting portion 23 of the duct harness 17 are, as shown in FIG. 3, which is an enlarged sectional view taken along the line AA in FIG.
A convex portion 31 protruding upward from the peripheral portion 29 is formed, and the inside of the convex portion 31 is formed as a cavity, and a temperature control air passage 33 is formed. The air-conditioning unit mounting portion 25 is formed with a concave portion 35 having an open upper portion. The concave portion 35 is formed with a guide port 37 communicating with the temperature-controlling air passage 33 so that the temperature-controlling air supplied from the air-conditioning unit 19 is supplied. Is guided to the temperature control air passage 33 below the mounting portion of the battery 5.

The temperature-controlled wind guided to the temperature-controlled wind passage 33 below the mounting portion of the battery 5 is applied to the convex portion 31 of the duct harness 17 in which the temperature-controlled wind passage 33 is formed. Are provided with a plurality of supply ports 39 for supplying the liquid. The supply port 39 is formed such that the opening area is increased toward the downstream side along the flow of the temperature control wind, so that a uniform temperature control can be performed on the plurality of batteries 5 arranged along the flow of the temperature control wind. I have.

The air conditioning unit 19 is mounted so as to cover the upper opening of the concave portion 35, and comprises a first heat exchanger 41 for controlling the battery temperature and a blower fan 43 as a blower. The first heat exchanger 41 is connected to an inlet pipe 45 and an outlet pipe 47 which are connected to a refrigerant pipe in a refrigeration cycle capable of performing a cooling and heating operation, which will be described later. The duct harness 17 is connected to the lower cover 11 of each of the pipes 45 and 47.
In a state where the air conditioning unit 19 is attached to the duct harness 17, the air conditioning unit 19 is inserted into an insertion opening 11 d formed on the vehicle front end side of the lower cover 11 and protrudes to the outside.

The four corners of the lower surface of the battery 5
As shown in FIG. 4, which is a bottom view of FIG. 4, a pair of high-power system power terminals 49 and a pair of low-power system control terminals 51 that serve as electrode terminal portions protruding downward are provided. The power terminal 49 and the control terminal 51 are formed with terminal holes 49a and 51a opening downward.
The power terminals 49 are used to supply power to the traveling motor 9 and the like, and are provided at both front and rear ends on the left side toward the front of the vehicle with the battery 5 mounted on the vehicle. The control terminals 51 are used to manage the voltage and temperature of each battery 5 detected by a sensor (not shown), and are provided at both front and rear ends on the right side toward the front of the vehicle.

On the other hand, on the peripheral edge 29 of the duct harness 17, each terminal hole 49 of the power terminal 49 and the control terminal 51 is provided.
a and 51a are provided with pin terminals 53 and 55, respectively, serving as connector portions which are connected to the external electrical wiring by being fitted to each other. At four corners on the control box mounting portion 27, pin terminals 57 for electric power are formed, and the pin terminals 57 are inserted into terminal holes (not shown) formed on the lower surface of the control box 15, and both of them are electrically connected. Are electrically connected.

The duct harness 17 has a power wiring 59 for connecting the power pin terminals 53 of the individual batteries 5 and connecting the power pin terminals 53 of the adjacent batteries 5 in series. As shown in FIG. 3, it is embedded by integral molding. In addition, the duct harness 17 includes
As shown in FIG. 5, which is a cross-sectional view taken along the line BB of FIG. 3, a cell controller 61 is provided between the control pin terminals 55 of the individual batteries 5. Cell controller 61
Controls the voltage and temperature of each battery 5, and
The cell controllers 61 are connected in series by a control wiring 63 integrally formed and embedded in the duct harness 17.

The parallel mounting portion 2 of the duct harness 17
The cell controller 61 for the three batteries 5 (three on the left side when viewed from the front of the vehicle) installed in the vehicle 3 uses a space that is appropriately vacated in the peripheral portion 29, or in a state where the battery 5 is flattened. A part or the whole of the duct harness 17 is constituted by a circuit board and mounted on the circuit board, etc., and these are connected in series by the control wiring 63 embedded in the duct harness 17.

The power wiring connected to the power wiring 59 is also connected to the control box mounting portion 27, and this power wiring connects the pin terminal 57 and the power wiring 59.

A power output wiring 65 and a control output wiring 67 are drawn out of the duct harness 17 on the vehicle front end side of the air conditioning unit mounting portion 25, respectively. The power output wiring 65 is connected to the pin terminal 57 of the control box 15.
The control output wiring 67 is connected via power wires provided in the control box mounting portion 27 and the serial mounting portion 21 respectively.
Connected to. The output wirings 65 and 67 are inserted into insertion holes 11 e and 11 f formed at the front end of the lower cover 11 with the duct harness 17 set on the lower cover 11.
, Are respectively drawn out and connected to a predetermined portion on the vehicle 1 side.

FIG. 6 shows a piping configuration of a refrigeration cycle connected to the inlet piping 45 and the outlet piping 47 of the first heat exchanger 41 in the air conditioning unit 19.
In addition to the first heat exchanger 41 for controlling the battery temperature, a compressor 69 that compresses and discharges the refrigerant, a second heat exchanger 71 that functions as a condenser that condenses the high-temperature gas refrigerant discharged from the compressor 69 during cooling, A third heat exchanger 73 serving as a condenser for condensing the high-temperature gas refrigerant discharged from the compressor 69 during heating, evaporating the liquid refrigerant that has passed through the third heat exchanger 73 during cooling, Fourth heat exchangers 77 for the passenger compartment, which serve as evaporators for evaporating the liquid refrigerant condensed through the heat exchanger 73, are provided.

The first heat exchanger 41 for controlling the temperature of the battery 5 serves as an evaporator for evaporating the liquid refrigerant during cooling.
At the time of heating, it becomes a condenser for condensing gas refrigerant. The fourth heat exchanger 77 for the vehicle interior is disposed in a duct 79 for introducing outside air and supplying a regulated air such as cold air or hot air to the interior of the vehicle, and a fourth heat exchanger upstream of the duct 79. A blower fan 81 that blows air toward 77 is provided. The downstream side of the duct 79 is branched by a partition wall 83 into a heating passage 85 and a cooling passage 87 that lead into the vehicle interior. At the upstream end of the partition wall 83, a heating passage 85 indicated by a solid line is provided.
Is provided, and a damper 89 which can be displaced between a state in which the cooling passage 87 shown by a two-dot chain line is closed is provided.

The second heat exchanger 71 is provided with a blower fan 91 similarly to the first heat exchanger 41, and a bypass pipe 93 for bypassing the first heat exchanger 71 is connected to the refrigerant pipe. At the connection between the bypass pipe 93 and the discharge pipe 95 of the compressor 69, there is provided a three-way valve 97 that switches the refrigerant flow path so that the refrigerant flows to the second heat exchanger 71 side during cooling and to the bypass pipe 93 side during heating. Is provided.

The inlet pipe 45 of the first heat exchanger 41 is connected by a pipe 99 to a pipe 101 connecting the second heat exchanger 71 and the third heat exchanger 73. A valve 103 is provided. The first flow dividing valve 103 always secures a flow path from the pipe 101 to the third heat exchanger 73, and opens the valve when necessary to divide the refrigerant from the pipe 101 to the pipe 99. Also, the pipe 99 has a first branch valve 103
From the side, the first flow control valve 105, the first flow control valve 1
First check valves 107 that allow the flow of the refrigerant from 05 to the first heat exchanger 41 are provided respectively. further,
The pipe 101 between the connection between the bypass pipe 93 and the pipe 101 and the second heat exchanger 71 has a second check which allows the flow of the refrigerant from the first heat exchanger 71 to the first branch valve 103. A valve 109 is provided.

A liquid tank 113 for storing a liquid refrigerant is provided in a pipe 111 connecting the third heat exchanger 73 and the fourth heat exchanger 77, and the liquid tank 113 and the fourth heat exchanger 77 in the pipe 111 are connected to each other. Between the pipe 99
Is connected by a pipe 115 between the first heat exchanger 41 and the first check valve 107. This piping 115
A second diverting valve 117 is provided at a connection portion of the second diverting valve 117 with the second diverting valve 117 side in order from the second diverting valve 117 side.
From the flow control valve 119 and the second flow control valve 119 to the pipe 99
A third check valve 121 that allows the flow to the outside is provided. The second branch valve 117 is connected to the liquid tank 113.
From the liquid tank 113 to the second flow control valve 119 when necessary.

The outlet pipe 47 of the first heat exchanger 41 is connected by a pipe 123 to the suction pipe 125 of the compressor 69, and the pipe 123 has a flow from the first heat exchanger 41 to the suction pipe 125. Fourth check valve 127 that allows pressure
And a fifth heat exchanger 128 which is located closer to the first heat exchanger 41 than the fourth check valve 127 and serves as an evaporator for evaporating the liquid refrigerant flowing out of the first heat exchanger 41 during heating. ing. The fifth heat exchanger 128 is provided with a blower fan 130. Further, between the first heat exchanger 41 and the fifth heat exchanger 128 in the pipe 123 and the pipe 11
1 is connected by a pipe 129 between the third heat exchanger 73 and the liquid tank 113, and the pipe 129 has a fifth port that allows a flow from the pipe 123 to the pipe 111.
A check valve 131 is provided.

A battery front ambient temperature sensor 133 and a battery rear ambient temperature sensor 135 are provided on the front side and the rear side of the vehicle in the battery pack 3, and the temperature of the battery 5 is detected for each battery 5. A battery temperature sensor 137 is provided. The detection signals of these sensors 133, 135, and 137 are combined with the detection signal of the indoor temperature sensor 139 and the air conditioning control unit 1.
41 is input. The air-conditioning control unit 141 controls the operation of the entire refrigeration cycle in response to the input of each detection signal.

Next, the air-conditioning control operation by the air-conditioning control unit 141 will be described with reference to the flowcharts shown in FIGS. 7 to 15 and the flow paths of the refrigerant shown in FIGS.

First, in FIG. 7, the ignition key of the electric vehicle is turned on (step 701), and the self-diagnosis of the air conditioning control unit 141 is performed (step 703).
If the self-diagnosis result is NG (step 705), a self-diagnosis abnormality display is performed by turning on a warning lamp (step 707). If the self-diagnosis result is OK (Step 705), the input of the preset vehicle interior temperature Tcm is received (Step 709), and the input of the vehicle interior temperature Tci detected by the interior temperature sensor 139 is received (Step 705). 711).

Further, a battery front side ambient temperature sensor 1
33, while receiving the detected temperatures Tbf and Tbr of the battery rear ambient temperature sensor 135 (step 71).
3, 715), and receives the input of the detected temperatures Tb1 to Tbn (here, n = 5) of the battery temperature sensor 137 in each battery 5 (step 717).
The operation shifts to the inspection operation of No. 7 (step 719).

The battery inspection operation is performed by n batteries 5
It is determined whether or not the absolute value of the difference between the average of the temperature of (ΣTbi) / n and the average of the ambient temperature before and after in the battery pack 3 (Tbf + Tbr) / 2 is lower than the standard value Te1 (step). 721). Where | (ΣTbi) / n−
If (Tbf + Tbr) / 2 | <Te1 is not satisfied, it is determined that the battery temperature sensor 137 is abnormal, and a battery sensor abnormality display is performed by turning on a warning lamp (step 723).

Conversely, | (ΣTbi) / n- (Tbf + Tbr)
/ 2 | <Te1, the average of the ambient temperature before and after in the battery pack 3: (Tbf + Tbr) / 2 is calculated as Tba
(Step 725), the difference Tcm-Tci between the vehicle interior set temperature Tcm and the vehicle interior temperature Tci is set as Tca (Step 727), and the routine proceeds to an operation mode determination routine (Step 801) in FIG. In this operation mode determination routine, an operation of setting an operation determination flag based on the above Tba and Tca is performed.

That is, if Tba> 0 is not satisfied (step 803), b = 1 (step 805), Tba
If> 0 and Tba> 10 are not satisfied (step 807), b = 2 (step 809), Tba> 1
If 0 and Tba> 25 are not satisfied (step 811), b = 3 (step 813), Tba> 25
Is satisfied and Tba> 35 is not satisfied (step 815), b = 4 (step 817), if Tba> 35 is satisfied (step 815), b = 5 (step 819), and Tca is satisfied. If> -1 is not satisfied (step 821), c = 1 (step 823), Tca
>>-1 and Tca> 1 is not satisfied (step 825), c = 2 (step 827), Tca> 1
Are satisfied (step 827), each flag is set to c = 3 (step 829).

In step 831, one of the operation modes B, C, D, E, F, G, and H is selected according to the relationship between the flag b for Tba and the flag c for Tca. Stop operation.

When b = 1 and c = 1 and when b = 2 and c = 1, the operation mode B is set and the battery 5
Heating is performed on both sides. The flowchart at this time is as shown in FIG. 9, and the flow of the refrigerant is as shown in FIG. First, the compressor 69 is driven (step 90).
1), the three-way valve 97 is opened toward the bypass pipe 93 (step 903), and the first branch valve 103 is opened (step 90).
5) The opening degree of the first flow control valve 105 is adjusted by the temperature load to determine which of the battery side and the vehicle interior side needs to be warmed more (step 907), and the blower fan 43 for the battery is turned on. Then, the rotation is performed while adjusting the rotation speed as necessary (step 909). The damper 89 of the duct 79 opens the heating passage 85 (step 911), and closes the second branch valve 117 (step 91).
3) The blower fan 81 for the vehicle interior is rotated (step 915).

In FIG. 16, the high-temperature gas refrigerant discharged from the compressor 69 passes through the first heat exchanger 41 and the third heat exchanger 73 via the bypass pipe 93 and the first branch valve 103, respectively. Blower fan 43
The air blown from the blower fan 81 exchanges heat with the first heat exchanger 41, and the air blown from the blower fan 81
The heat is exchanged in the second heat exchanger 73 via the heat exchanger 77 to become hot air, and each of the hot air is supplied to the inside of the battery pack 3 and the vehicle interior to be heated, whereby the temperature of the battery 5 rises. At the same time, the temperature inside the cabin also rises.

When b = 1 and c = 2, b = 1 and c =
3, b = 2 and c = 2 and b = 2 and c
In the case of = 3, the operation mode is the operation mode C, in which only the battery side is heated and the inside of the vehicle compartment is cut off from the ventilation. The flowchart at this time is as shown in FIG. 10, and the flow of the refrigerant is as shown in FIG. First, the compressor 69 is driven (step 100).
1), the three-way valve 97 is opened to the bypass pipe 93 side (step 1003), and the first branch valve 103 is opened (step 10).
05), the first flow control valve 105 is fully opened (step 1007), and the battery blower fan 43
Is rotated while adjusting the number of rotations as necessary (step 1009). The damper 89 of the duct 79 opens the cooling passage 87 (step 1011), and the second
The flow dividing valve 117 is closed (step 1013), and the blower fan 81 for the vehicle interior is stopped (step 1015).

In FIG. 17, the high-temperature gas refrigerant discharged from the compressor 69 passes through the first heat exchanger 41 through the bypass pipe 93 and the first branch valve 103, and thus the air blown from the blower fan 43. Are heat-exchanged in the first heat exchanger 41 to become hot air, and this hot air is supplied into the battery pack 3 and heated, whereby the temperature of the battery 5 rises. In the vehicle interior, the blower fan 81 is stopped, so that the blow is cut off. In the case where the liquid refrigerant flows into the fourth heat exchanger 77, the blower fan 81 is appropriately rotated to evaporate.

When b = 3 and c = 1, the operation mode is D, in which only the passenger compartment is heated and the air blow to the battery is cut off. The flowchart at this time is as shown in FIG. 11, and the flow of the refrigerant is as shown in FIG. First, the compressor 69 is driven (step 1101), and the three-way valve 97 is opened to the bypass pipe 93 side (step 1103).
3 is closed (step 1105), and the battery blower fan 43 is stopped (step 1107). Damper 89
Is set to open the heating passage 85 (step 11).
09), the second branch valve 117 is closed (step 111).
1), the blower fan 81 for the vehicle interior is rotated (step 1113).

In FIG. 18, the high-temperature gas refrigerant discharged from the compressor 69 passes through the third heat exchanger 73 via the bypass pipe 93, so that the air blown from the blower fan 81 is changed to the fourth heat exchanger. The heat reaches the third heat exchanger 73 via the heat exchanger 77 and becomes a hot air by heat exchange. This warm air is supplied into the vehicle compartment and heated, and the temperature in the vehicle compartment rises. As for the inside of the battery pack 3, the blower fan 43 is stopped, so that the ventilation is cut off.

When b = 4 and c = 1, the operation mode E
The interior of the vehicle is heated and the battery side is blown. The flowchart at this time is shown in FIG. 12, and the flow of the refrigerant is shown in FIG.
become that way. First, the compressor 69 is driven (step 1201), the three-way valve 97 is opened to the bypass pipe 93 side (step 1203), the first branch valve 103 is closed (step 1205), and the battery blower fan 43 is rotated as necessary. Rotate while adjusting the number (Step 1
207). The damper 89 opens the heating passage 85 (step 1209), closes the second branch valve 117 (step 1211), and rotates the vehicle interior blower fan 81 (step 1213).

In FIG. 19, when the high-temperature gas refrigerant discharged from the compressor 69 passes through the third heat exchanger 73 via the bypass pipe 93, the air blown from the blower fan 81 is changed to the fourth heat exchanger. The heat reaches the third heat exchanger 73 via the heat exchanger 77 and becomes a hot air by heat exchange. This warm air is supplied into the vehicle compartment and heated, and the temperature in the vehicle compartment rises. For the inside of the battery pack 3, only the blowing is performed by the blower fan 43.

When b = 4 and c = 2, b = 5 and c =
In the case of 1, and in the case of b = 5 and c = 2, it becomes the operation mode F, the battery side is cooled, and the ventilation in the vehicle compartment side is cut off. The flowchart at this time is as shown in FIG. 13, and the flow of the refrigerant is as shown in FIG. First, the compressor 69 is driven (step 1301), and the three-way valve 97 is opened to the second heat exchanger 71 side (step 1303).
3 is closed (step 1305). The damper 89 opens the cooling passage 87 (step 1307), opens the second branch valve 117 (step 1309), fully opens the second flow regulating valve 119 (step 1311), and requires the battery blower fan 43. The rotation is adjusted according to the rotation speed (step 1313), and the indoor blower fan 81 is stopped (step 1315).

In FIG. 20, the high-temperature gas refrigerant discharged from the compressor 69 is condensed via the second heat exchanger 71 to become a low-temperature liquid refrigerant, which is the third heat exchanger 7.
3. After passing through the second flow dividing valve 117 and the second flow regulating valve 119 which is fully opened, it reaches the first heat exchanger 41. When the cooled liquid refrigerant passes through the first heat exchanger 41, the air blown from the blower fan 43 exchanges heat and becomes cool air, and the cool air is supplied into the battery pack 3 to be cooled, and the battery 5 is cooled. Temperature drops. In the vehicle interior, the blower fan 81 is stopped, so that the ventilation is cut off. Note that the liquid refrigerant passes through the second branch valve 117 to
When the liquid refrigerant reaches the heat exchanger 77, the blower fan 81 is appropriately rotated to evaporate the liquid refrigerant.

When b = 3 and c = 3, the operation mode G
, And the inside of the vehicle is cooled, and the ventilation on the battery side is cut off. The flowchart at this time is as shown in FIG. 14, and the flow of the refrigerant is as shown in FIG. First, the compressor 69 is driven (step 1401), and the three-way valve 97 is connected to the second heat exchanger 7.
It is opened to the first side (step 1403), and the first branch valve 103 is closed (step 1405). The damper 89 opens the cooling passage 87 (step 1407), closes the second branch valve 117 (step 1409), stops the battery blower fan 43 (step 1411), and rotates the indoor blower fan 81. (Step 141
3).

In FIG. 21, the high-temperature gas refrigerant discharged from the compressor 69 is condensed through the second heat exchanger 71 and becomes a low-temperature liquid refrigerant.
3. After passing through the fourth heat exchanger 77 through the second branch valve 117, the air blown from the blower fan 81 exchanges heat and becomes cool air, and this cool air is supplied to the vehicle interior and cooled. The temperature inside the cabin falls. On the battery side, the blower fan 43 is stopped, so that the ventilation is cut off.

When b = 4 and c = 3 and when b = 5 and c = 3, the operation mode becomes H and the battery 5
Cooling is performed on both the side and the passenger compartment side. The flowchart at this time is as shown in FIG. 15, and the flow of the refrigerant is as shown in FIG. First, the compressor 69 is driven (step 1).
501), the three-way valve 97 is opened to the second heat exchanger 71 side (step 1503), the first branch valve 103 is closed (step 1505), and the damper 89 is set to a state where the cooling passage is opened (step 1507). The second flow dividing valve 117 is opened (step 1509), and the degree of opening of the second flow regulating valve 119 is adjusted based on the temperature load to determine which of the battery side and the vehicle interior side needs to be cooled (step 151).
1) Further, the blower fan 43 for the battery is rotated while adjusting the rotation speed as necessary (step 151).
3) The blower fan 81 for the vehicle interior is rotated (step 1515).

In FIG. 22, the high-temperature gas refrigerant discharged from the compressor 69 is condensed through the second heat exchanger 71 and becomes a low-temperature liquid refrigerant.
3, via the second flow dividing valve 117, reach the first heat exchanger 41 and the fourth heat exchanger 77, respectively. Here, each air blown from the blower fans 43 and 81 exchanges heat with the refrigerant and becomes cool air.
The air is supplied to the inside of the vehicle and the vehicle interior to be cooled, and the battery 5 is cooled and the temperature in the vehicle interior decreases.

When b = 3 and c = 2, the cooling / heating operation is stopped on both the battery side and the vehicle interior side, and the blowing operation is also stopped.

In the battery pack 3 in the operation modes B, C, E, F and H, the blower fan 43
Hot air or cold air blown by the air inlet enters the temperature control air passage 33 of the duct harness 17 from the guide port 37 of the air conditioning unit mounting section 25 shown in FIG.
Flows out to the lower surface of the battery 5 to efficiently control the temperature of the battery 5, and the air whose temperature has changed is circulated again by the blower fan 43 so as to pass through the first heat exchanger 41. At this time, since the opening area of the supply port 39 is larger toward the downstream side of the temperature control air passage 33, even if the temperature change increases toward the downstream side of the temperature control air, uniform temperature control is performed on each battery 5, A longer life of the battery 5 is achieved.

In this case, since the temperature-controlled air circulates in the sealed battery pack 3, it is possible to avoid complication of the structure of the air intake and exhaust ducts and the fan structure. The simplification of the mounting structure is achieved, the productivity can be improved, and the degree of sealing of the battery pack 3 is increased to improve the watertightness.

The battery 5 is connected to the duct harness 17.
Simply put on the power terminal 49 and the control terminal 51
Are connected to the pin terminals 53 and 55 on the duct harness 17 side, so that the mounting and fixing structure of the battery 5 is simplified, the mounting work is also facilitated, and the productivity can be improved. Further, a cell controller 61 having functions such as checking the voltage value and temperature of each battery 5.
Is provided between the pin terminals 55 below the battery 5 so that the space in the battery pack 3 can be effectively used, and the battery mounting structure can be made compact.

When the inside of the battery pack 3 is air-conditioned, the first heat exchanger 41 is used as the air-conditioning unit 19 and a refrigeration cycle for air-conditioning in the vehicle compartment is used. In addition, double installation can be suppressed, and simplification of the configuration is achieved. In the control operation of the air conditioning control unit 141 described above, upon receiving a detection signal from a solar radiation sensor or an outside air temperature sensor,
Finer operation control is also possible.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a battery pack and various components contained in the battery mounting structure of an electric vehicle according to an embodiment of the present invention.

FIG. 2 is a simplified side sectional view of an electric vehicle on which the battery pack of FIG. 1 is mounted.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG. 1 in a state where the battery of FIG. 1 is placed on a duct harness.

FIG. 4 is a bottom view of the battery of FIG. 1;

FIG. 5 is a sectional view taken along line BB of FIG. 3;

6 is a piping configuration diagram of a refrigeration cycle connected to an inlet piping and an outlet piping of a first heat exchanger in the air conditioning unit of FIG.

FIG. 7 is a flowchart showing an air conditioning control operation by the air conditioning control unit in FIG. 6;

FIG. 8 is a flowchart showing an air conditioning control operation by the air conditioning control unit in FIG. 6;

9 shows a vehicle interior by the air-conditioning control unit in FIG. 6,
It is a flowchart which shows the operation | movement at the time of heating operation with both batteries.

10 is a flowchart showing an operation of the air conditioning control unit in FIG. 6 when performing a heating operation only on the battery side.

11 is a flowchart showing an operation of the air conditioning control unit in FIG. 6 when performing a heating operation only in the vehicle interior.

12 is a flowchart showing an operation by the air-conditioning control unit in FIG. 6 when the vehicle interior is heated and the battery side performs a blowing operation.

13 is a flowchart showing an operation of the air conditioning control unit in FIG. 6 when performing a cooling operation only on the battery side.

FIG. 14 is a flowchart showing the operation of the air conditioning control unit in FIG. 6 when performing a cooling operation only in the vehicle interior.

FIG. 15 is a flowchart showing the operation of the air conditioning control unit in FIG. 6 when performing cooling operation on both the vehicle interior and the battery.

16 is a refrigerant flow diagram in the operation mode in FIG. 9;

17 is a flow diagram of the refrigerant in the operation mode in FIG.

18 is a refrigerant flow diagram in the operation mode in FIG.

19 is a flow diagram of the refrigerant in the operation mode in FIG.

20 is a flow diagram of the refrigerant in the operation mode in FIG.

FIG. 21 is a flow diagram of the refrigerant in the operation mode in FIG.

FIG. 22 is a flow diagram of the refrigerant in the operation mode in FIG.

[Explanation of symbols]

 3 Battery Pack (Battery Case) 5 Battery 9 Traveling Motor 17 Duct Harness (Temperature Control Air Guide Member) 19 Air Conditioning Unit 33 Temperature Control Air Flow Path 37 Guide Port 39 Supply Port 41 First Heat Exchanger (Battery Heat Exchanger) 43) Blower fan (blower) 49 Power terminal (electrode terminal) 51 Control terminal (electrode terminal) 53, 55 pin terminal (connector) 61 Cell controller 77 Fourth heat exchanger (heat exchanger for vehicle interior)

Claims (8)

[Claims] A battery, which is a power source of a traveling motor, is housed and fixed in a battery case mounted on a vehicle and capable of substantially sealing the inside thereof. A battery mounting structure for an electric vehicle, comprising an air conditioning unit for adjusting the temperature of the battery. 2. A temperature control air guide member in which a battery is mounted via a predetermined gap is accommodated in a battery case, and the temperature control air guide member controls a temperature control air supplied from an air conditioning unit. A guide port for guiding the battery below the mounting portion, and a supply port for supplying the temperature-controlled wind guided from the guide port to the lower side of the mounting portion to the lower surface side of the battery. The battery mounting structure for an electric vehicle according to claim 1. 3. The temperature control air guide member itself has a temperature control air passage through which a temperature control air guided from the guide port to a position lower than the mounting portion passes. Battery mounting structure for electric vehicles. 4. The battery according to claim 2, wherein a plurality of batteries are arranged along the flow of the temperature-controlled wind, and the supply port is formed to have a larger opening area toward the downstream side of the flow of the temperature-controlled wind.
Or the battery mounting structure of the electric vehicle according to 3. 5. An electrode terminal portion is provided on a bottom portion of a battery, and a temperature control air guide member is provided with the battery, whereby the electrode terminal portion is fitted and electrically connected to an external electric wiring. The battery mounting structure for an electric vehicle according to any one of claims 2 to 4, further comprising a unit. 6. The connector section is provided with a pair of connectors for power supply and a pair of connectors, respectively, and connects the connectors to a temperature control guide member between the connectors for control, thereby connecting the voltage of each battery. The battery mounting structure for an electric vehicle according to claim 5, further comprising a cell controller having a function of checking a value and a temperature. 7. The air conditioning unit includes a heat exchanger and a blower, and forms a part of a refrigeration cycle that can perform a cooling and heating operation by circulating a refrigerant. The refrigeration cycle cools and heats a vehicle compartment. The battery mounting structure for an electric vehicle according to claim 1, further comprising a heat exchanger. 8. An air-conditioning unit provided in the battery case supplies a temperature-controlled wind to a battery mounted on a vehicle and housed and fixed in a battery case capable of substantially sealing the inside, and serving as a power source of a traveling motor. A battery temperature control method for an electric vehicle, comprising: