JP6349761B2 - Power supply - Google Patents

Description

  The present invention relates to a power supply device.

  Conventionally, a battery chamber containing a battery therein, an exhaust chamber communicating with the battery chamber via an opening, and an exhaust path provided in the exhaust chamber and communicating with the atmosphere outside the exhaust chamber are provided. A known power supply device is known (see, for example, Patent Document 1).

  When gas is generated due to an abnormality in the battery in the battery chamber, the gas is supplied from the battery chamber to the exhaust chamber through the opening. Thereby, when the atmospheric pressure in the exhaust chamber becomes higher than the atmospheric pressure, the gas is released from the exhaust path to the outside of the exhaust chamber.

JP2012-15121A

However, when the atmospheric pressure in the exhaust chamber becomes extremely higher than the atmospheric pressure, the atmospheric pressure in the exhaust chamber decreases as the gas is released from the exhaust passage, and there is a possibility that the atmospheric pressure temporarily falls below the atmospheric pressure. If the pressure in the exhaust chamber falls below atmospheric pressure, air flows into the exhaust chamber from the exhaust passage, and the inflowing air and the gas in the exhaust chamber mix to cause an oxidation reaction, thereby increasing the temperature. There was a risk.
Therefore, an object of the present invention is to provide a power supply device that can efficiently suppress the inflow of air from the atmosphere through the exhaust path into the exhaust chamber.

A power supply device according to the present invention includes a battery chamber, an exhaust chamber communicated with the battery chamber via a communication passage, an exhaust passage communicating with the outside of the exhaust chamber, and an on-off valve that opens and closes the exhaust passage, The gas generated from the battery in the battery chamber is discharged to the outside of the battery chamber through the communication path, the exhaust chamber, and the exhaust path. Here, the cross-sectional area in the direction orthogonal to the gas flow direction of the communication passage is formed smaller than the cross-sectional area in the direction orthogonal to the gas flow direction of the exhaust chamber, and a predetermined atmospheric pressure higher than the atmospheric pressure is set. The exhaust passage is set to be closed by an on-off valve when the atmospheric pressure inside the battery chamber is lower than the predetermined atmospheric pressure and higher than the atmospheric pressure. The predetermined atmospheric pressure is the atmospheric pressure inside the exhaust chamber .

According to the power supply device of the present invention, air can be efficiently suppressed from flowing into the exhaust chamber from the atmosphere via the exhaust path. Specifically, when the release of gas from the battery in the battery chamber ends, the atmospheric pressure in the battery chamber decreases before the exhaust chamber. Therefore, by closing the on-off valve when the atmospheric pressure inside the battery chamber becomes a predetermined atmospheric pressure or lower, it is possible to reliably prevent the atmospheric pressure in the exhaust chamber from being lower than the atmospheric pressure.
If the on-off valve is closed when the pressure in the battery chamber becomes equal to or lower than the pressure in the exhaust chamber, the pressure in the exhaust chamber can be further reliably prevented from becoming lower than the atmospheric pressure. As described above, air can be more effectively suppressed from flowing into the exhaust chamber from the atmosphere via the exhaust path.

1 is a side view of a vehicle equipped with a power supply device according to a first embodiment of the present invention. It is the perspective view which expanded the power supply device of FIG. 1, and has shown the state which opened the exhaust passage of the exhaust chamber. It is the perspective view which expanded the power supply device of FIG. 1, and has shown the state which closed the exhaust path of the exhaust chamber with the on-off valve. It is a graph which shows the relationship between the opening-and-closing state of the on-off valve in a battery chamber and an exhaust chamber, and the internal pressure of a battery chamber and an exhaust chamber. It is the perspective view which expanded the power supply device which concerns on 2nd Embodiment of this invention, and has shown the state which closed the exhaust path of the exhaust chamber. It is the perspective view which expanded the exhaust chamber vicinity of FIG. It is the perspective view which expanded the power supply device which concerns on 2nd Embodiment of this invention, and has shown the state which opened the exhaust passage of the exhaust chamber. It is the perspective view which expanded the exhaust chamber vicinity of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First embodiment]
First, the power supply device 11 according to the first embodiment of the present invention will be described.

  As shown in FIG. 1, a front wheel 3 and a rear wheel 5 are disposed in the front and rear of the vehicle 1, and a vehicle compartment 7 is provided between the front wheel 3 and the rear wheel 5. A trunk room 9 is provided on the rear side of the passenger compartment 7. A power supply device 11 according to this embodiment is provided below the passenger compartment 7 and the trunk room 9. Specifically, a battery chamber 15 of the power supply device 11 is provided below the floor panel 13 constituting the bottom of the vehicle compartment 7, and an exhaust chamber 17 is provided below the trunk room 9.

  As shown in FIGS. 1 to 3, the power supply device 11 connects the battery chamber 15 disposed on the front side of the vehicle, the exhaust chamber 17 disposed on the rear side of the vehicle, and the battery chamber 15 and the exhaust chamber 17. A communication path 19, an exhaust path 21 provided in the exhaust chamber 17, and an opening / closing device 51 that opens and closes the exhaust path 21 are provided. 2 to 3, the vertical height and the longitudinal length of the battery chamber 15 and the exhaust chamber 17 are changed with respect to the dimensions of the power supply device 11 of FIG. 1 for easy understanding.

  Here, the battery chamber 15 is disposed on the vehicle front side, which is the vehicle inner side than the exhaust chamber 17. That is, the battery chamber 15 is disposed on the vehicle center side in the vehicle front-rear direction, and the exhaust chamber 17 is disposed on the vehicle rear side, which is on the vehicle outer side than the battery chamber 15.

  As shown in FIGS. 1 to 3, a battery 23 is accommodated in the battery chamber 15. The battery chamber 15 includes an upper surface 25 disposed on the upper side, a bottom surface 27 disposed on the lower side, a front surface 29 disposed on the front side of the vehicle, a rear surface 31 disposed on the rear side of the vehicle, and laterally. It is surrounded by a pair of arranged side surfaces 33 and 33 and is formed in a rectangular parallelepiped shape.

  The exhaust chamber 17 is formed smaller than the battery chamber 15. The exhaust chamber 17 is partitioned from the battery chamber 15 and is arranged at a predetermined interval from the battery chamber 15. Further, the exhaust chamber 17 communicates with the battery chamber 15 via a cylindrical communication path 19. The exhaust chamber 17 includes an upper wall surface 41 disposed on the upper side, a bottom wall surface 43 disposed on the lower side, a front wall surface 45 disposed on the front side of the vehicle, a rear wall surface 47 disposed on the rear side of the vehicle, And a pair of side wall surfaces 49, 49 arranged in the direction, and is formed in a rectangular parallelepiped shape.

  The communication path 19 is formed in a cylindrical shape extending in the front-rear direction, and connects the rear surface 31 of the battery chamber 15 and the front wall surface 45 of the exhaust chamber 17. As a result, the inside of the battery chamber 15 and the inside of the exhaust chamber 17 are communicated with each other via the communication path 19.

  The exhaust passage 21 is formed in a cylindrical shape extending in the front-rear direction and protrudes rearward from the rear wall surface 47. Thereby, the inside of the exhaust chamber 17 and the outside (atmosphere) communicate with each other through the exhaust passage 21.

  The opening / closing device 51 includes a support base 53 fixed to the rear wall surface 47 of the exhaust chamber 17, a pair of left and right springs 55 placed on the support base 53, and a mounting plate 57 attached on these springs 55. And an open / close valve 59 having a U-shaped front view protruding upward from the upper surface of the mounting plate 57. The on-off valve 59 is fixed to the upper end of an elongated rod-shaped mounting rod 67 extending vertically.

  A cut 61 is formed on the lower side of the exhaust passage 21, and the opening / closing valve 59 is disposed at a position below the cut 61. A pressure pipe 63 extends rearward from the upper surface 25 of the battery chamber 15. The pressure pipe 63 is formed in an elongated cylindrical shape, and an elongated cylindrical sealing body 65 is fitted and inserted into the inner side of the end 63 a of the pressure pipe 63. Since the outer diameter of the sealing body 65 is substantially the same as the inner diameter of the end 63 a of the pressure pipe 63, the air sent from the pressure pipe 63 is configured not to leak from the end 63 a of the pressure pipe 63. ing. Further, when the gas G <b> 1 presses the upper surface of the sealing body 65 through the pressure pipe 63, the sealing body 65 is pushed downward with respect to the pressure pipe 63.

  In the normal state where no load is applied, the spring 55 extends upward as shown in FIG. 3, so that the mounting plate 57 and the on-off valve 59 are disposed at the upper end position. In this case, the exhaust passage 21 is closed by inserting the opening / closing valve 59 into the cut 61 of the exhaust passage 21.

On the other hand, when the battery 23 in the battery chamber 15 malfunctions and the gas G1 is generated, the pressure in the battery chamber 15 increases. Then, the gas G1 flows into the pressure pipe 63, the internal pressure of the pressure pipe 63 rises, and a load that pushes down the sealing body 65 acts. With this load, the mounting plate 57 and the on-off valve 59 are lowered together with the sealing body 65, and the exhaust passage 21 is opened.
Next, the relationship between the open / close state of the on-off valve and the internal pressure of the battery chamber and the exhaust chamber will be described with reference to FIG.

  The horizontal axis indicates whether the on-off valve 59 is open or closed. The vertical axis represents the internal pressure of the battery chamber 15 and the exhaust chamber 17. Here, the predetermined atmospheric pressure is set to a predetermined atmospheric pressure higher than the atmospheric pressure. The solid line indicates the internal pressure P1 of the battery chamber 15, and the broken line indicates the internal pressure P2 of the exhaust chamber 17.

First, when the battery 23 accommodated in the battery chamber 15 is abnormal and gas G1 is generated from the battery 23, the internal pressure P1 of the battery chamber 15 gradually increases. Further, since the exhaust chamber 17 is connected to the battery chamber 15 via the communication path 19, the gas G 1 from the battery chamber 15 flows into the exhaust chamber 17, and the internal pressure P 2 of the exhaust chamber 17 is also relative to the battery chamber 15. Ascending gradually with time delay.
Here, when the internal pressure P1 of the battery chamber 15 is equal to or higher than the atmospheric pressure and equal to or lower than the predetermined pressure, the exhaust valve 21 is closed by closing the on-off valve 59 as shown in FIG.
When the internal pressure P1 of the battery chamber 15 exceeds a predetermined pressure , the exhaust passage 21 is opened by opening the on-off valve 59 as shown in FIG.
Below, the effect by 1st Embodiment is demonstrated.

(1) The power supply device 11 according to the first embodiment communicates the battery chamber 15 that houses the battery 23, the exhaust chamber 17 partitioned from the battery chamber 15, and the battery chamber 15 and the exhaust chamber 17. A communication passage 19, an exhaust passage 21 provided in the exhaust chamber 17 and communicating with the outside of the exhaust chamber 17, and an opening / closing valve 59 for opening and closing the exhaust passage 21 are provided. Here, when a predetermined atmospheric pressure higher than the atmospheric pressure is set, and the atmospheric pressure inside the battery chamber 15 is equal to or lower than the predetermined atmospheric pressure and equal to or higher than the atmospheric pressure, the opening / closing valve 59 closes the exhaust passage 21. It is set as follows.

  When the battery 23 malfunctions in the battery chamber 15 and gas G1 is generated from the battery 23, the atmospheric pressure in the battery chamber 15 becomes higher than that in the exhaust chamber 17, and the exhaust chamber 17 from the battery chamber 15 through the communication path 19 is increased. Gas G1 flows into the exhaust chamber 17 and the pressure in the exhaust chamber 17 increases.

  On the other hand, when the release of the gas G1 from the battery 23 ends, the atmospheric pressure in the battery chamber 15 decreases before the exhaust chamber 17, and thereafter the atmospheric pressure in the exhaust chamber 17 decreases. That is, the atmospheric pressure in the battery chamber 15 changes temporally before the atmospheric pressure in the exhaust chamber 17.

Therefore, paying attention to the pressure change in the battery chamber 15, if the on-off valve 59 is closed when the pressure inside the battery chamber 15 becomes a predetermined pressure or less , the pressure inside the exhaust chamber 17 becomes surely less than the atmospheric pressure. This can be prevented. As described above, air can be efficiently suppressed from flowing into the exhaust chamber 17 through the exhaust passage 21 from the atmosphere.
(2) The battery chamber 15 and the exhaust chamber 17 are mounted on the vehicle 1, and the battery chamber 15 is disposed on the vehicle inner side than the exhaust chamber 17.

Therefore, when a collision load is input from the obstacle to the vehicle 1, the obstacle hits the exhaust chamber 17 before the battery chamber 15. Therefore, the input load to the battery chamber 15 at the time of a vehicle collision can be reduced.
[Second Embodiment]
Next, a power supply device according to a second embodiment of the present invention will be described. However, parts having the same structure as in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIGS. 5 to 8, the power supply device 111 according to the second embodiment includes a battery chamber 15 disposed on the front side of the vehicle, an exhaust chamber 117 disposed on the rear side of the vehicle, and these battery chambers 15 and 15. A communication passage 19 that connects the exhaust chamber 117, an exhaust passage 121 provided in the exhaust chamber 117, and an opening / closing device 151 that opens and closes the exhaust passage 121 are provided.

  The exhaust passage 121 is formed in a cylindrical shape extending along the front-rear direction, and protrudes rearward from the rear wall surface 47. Thereby, the inside of the exhaust chamber 117 and the outside (atmosphere) communicate with each other through the exhaust path 121.

  As shown in FIG. 6, the opening / closing device 151 includes a support base 153 fixed to the rear wall surface 47 of the exhaust chamber 117, and a pair of upper and lower mounting plates 157 attached to the right side of the support base 153 via a slide bar, A spring 55 wound around the slide rod and an opening / closing valve 59 having a U-shape in front view protruding from the mounting plate 157 toward the right side are provided. Note that the mounting plate 157 is configured to be slidable with respect to the support base 153 via an elongated sealing body 167 extending along the left-right direction.

  A cut 161 is formed along the vertical direction on the left side (LH side) of the exhaust passage 121, and the opening / closing valve 59 is disposed on the left side of the cut 161. A pressure pipe 163 extends rearward from the upper surface 25 of the battery chamber 15. The pressure pipe 163 is formed in an elongated cylindrical shape, and an elongated cylindrical sealing body 165 is fitted and inserted into the end 163 a of the pressure pipe 163. Since the outer diameter of the sealing body 165 is formed to be substantially the same as the inner diameter of the end 163a of the pressure pipe 163, the gas G2 sent from the pressure pipe 163 is configured not to leak from the end 163a of the pressure pipe 163. Has been. Further, when the gas G2 presses the right end surface of the sealing body 165 via the pressure pipe 163, the sealing body 165 is pushed out to the left side.

  Further, a pressure pipe 160 having a U-shape in plan view (top view) is connected to the left side wall surface 49 of the exhaust chamber 117. An elongated cylindrical sealing body 167 is fitted and inserted inside the end 160 a of the pressure pipe 160. Since the outer diameter of the sealing body 167 is formed to be substantially the same as the inner diameter of the end portion 160a of the pressure pipe 160, the gas G3 sent from the pressure pipe 160 is configured not to leak from the end portion 160a of the pressure pipe 160. Has been. Further, when the gas G3 presses the left end face of the sealing body 167 via the pressure pipe 160, the sealing body 167 is pushed out to the right side.

  Here, the sealing body 165 and the sealing body 167 are arranged on the same axis, and the left end face of the sealing body 165 and the mounting plate 157 are in contact with each other. Therefore, the opening / closing valve 59 moves toward the smaller pressing force of the sealing body 165 and the pressing force of the sealing body 167. That is, if the pressing force of the sealing body 167 is larger, as shown in FIG. 6, the on-off valve 59 moves to the right and is inserted into the cut 161, and the exhaust passage 121 is closed. The force with which the spring 55 pushes the mounting plate 157 is very small and can be substantially ignored. On the other hand, if the pressing force of the sealing body 165 is larger, as shown in FIG. 8, the on-off valve 59 moves to the left and comes out of the notch 161, and the exhaust passage 121 is opened.

  In summary, when the pressure inside the battery chamber 15 becomes lower than the pressure inside the exhaust chamber 117, the force by which the gas G2 presses the sealing body 165 causes the gas G3 to press the sealing body 167. As a result, the spring 55 extends, the on-off valve 59 is closed, and the exhaust passage 121 is closed as shown in FIG. That is, in the present embodiment, the predetermined atmospheric pressure in the first embodiment is the atmospheric pressure inside the exhaust chamber 117.

On the other hand, when the air pressure inside the battery chamber 15 becomes higher than the air pressure inside the exhaust chamber 117, the force with which the gas G2 presses the sealing body 165 is greater than the force with which the gas G3 presses the sealing body 167. As a result, the opening / closing valve 59 is opened and the exhaust passage 121 is opened as shown in FIG.
Below, the effect by 2nd Embodiment is demonstrated.

(1) The power supply device 111 according to the second embodiment closes the on-off valve 59 and closes the exhaust passage 121 when the air pressure inside the battery chamber 15 becomes lower than the air pressure inside the exhaust chamber 117. Was set to close.

  As described above, when the release of gas from the battery 23 ends, the atmospheric pressure in the battery chamber 15 decreases before the exhaust chamber 117, and then the atmospheric pressure in the exhaust chamber 117 decreases. That is, the air pressure in the battery chamber 15 changes temporally before the air pressure in the exhaust chamber 117.

Therefore, paying attention to the change in the atmospheric pressure in the battery chamber 15 and the change in the atmospheric pressure in the exhaust chamber 117, if the on-off valve 59 is closed when the atmospheric pressure in the battery chamber 15 becomes equal to or lower than the atmospheric pressure in the exhaust chamber 117, it is more reliable. It is possible to prevent the atmospheric pressure in the exhaust chamber 117 from becoming atmospheric pressure or lower. As described above, air can be more effectively suppressed from flowing into the exhaust chamber 117 through the exhaust passage 121 from the atmosphere.

DESCRIPTION OF SYMBOLS 1 Vehicle 11,111 Power supply device 15 Battery chamber 17,117 Exhaust chamber 19 Communication path 21 Exhaust path 23 Battery 59 On-off valve

Claims (2)

A battery chamber that houses the battery, an exhaust chamber partitioned from the battery chamber, a communication path that connects the battery chamber and the exhaust chamber, and an exhaust path that is provided in the exhaust chamber and communicates with the outside of the exhaust chamber And an open / close valve that opens and closes the exhaust passage, and the gas generated from the battery inside the battery chamber is discharged through the communication passage, the exhaust chamber, and the exhaust passage to the outside of the battery chamber. A device,
The cross-sectional area in the direction orthogonal to the gas flow direction of the communication passage is formed smaller than the cross-sectional area in the direction orthogonal to the gas flow direction of the exhaust chamber,
Set a predetermined pressure higher than atmospheric pressure,
When the atmospheric pressure inside the battery chamber is less than the predetermined atmospheric pressure and greater than atmospheric pressure,
Set to close the exhaust passage by the on-off valve ,
The power supply apparatus , wherein the predetermined atmospheric pressure is an atmospheric pressure inside the exhaust chamber . The battery chamber and the exhaust chamber are mounted on a vehicle,
The power supply apparatus according to claim 1, wherein the battery chamber is disposed inside the vehicle with respect to the exhaust chamber.

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