JP5641387B2 - Battery pack - Google Patents

Description

  The present invention relates to a battery pack including a battery storage case for storing a battery.

  A battery pack in which a plurality of batteries are stored in a battery storage case is used as a power source for a moving body such as an automobile or an emergency power source. These battery packs often carry a large current during charging and discharging, and when a large current flows through the battery, the battery becomes hot due to Joule heat, etc., and the battery storage case is in a high temperature state due to the heat generated from the battery. It becomes. Further, these battery packs are often used in a high temperature atmosphere without charging and discharging with a large current.

  When the battery of the battery pack is in a high temperature state, not only the safety of the battery is lowered, but there is a possibility that the life of the battery is shortened because the battery is in a high temperature state for a long time. Therefore, as described in Patent Document 1, there is a method of cooling the battery by providing the battery storage case with an intake port for sucking a cooling medium and an exhaust port for discharging the cooling medium, and flowing the cooling medium through a gap between the batteries. .

  On the other hand, in the battery storage case as described above, a method of supporting the battery by providing a spacer between the battery and the bottom plate of the battery storage case, or a battery having a spacer between the battery and the side wall of the battery storage case. There is a way to fix the position of. In particular, when storing a heavy battery, metal is often used as the material of the battery storage case from the viewpoint of strength, and by using an insulating material for the spacer, the battery and the battery case Also plays the role of insulation. A method of fixing a battery by providing a spacer between the battery and the battery storage case is a method of using a binding member for fixing the battery and locking the binding member and the battery storage case with a screw or the like. Compared to the above, the locking operation can be omitted, and the battery can be fixed by an easy operation.

JP 2006-128124 A

  In the battery pack provided with the spacer between the battery and the battery storage case as described above, the space between the battery and the battery storage case is used as a part of the flow path of the cooling medium in addition to the gap between the batteries. Since there is a spacer in the space, a sufficient amount of cooling medium cannot flow, and as a result, the amount of cooling medium flowing through the gap between the batteries is limited, and the battery cannot be cooled efficiently. There was a problem.

  Therefore, the present invention is provided with a spacer for fixing the battery in a space between the battery and the battery case, and the battery is efficiently used even when the space is used as a part of the flow path of the cooling medium. It is an object to provide a battery pack that can be cooled well.

The present invention provides a plurality of batteries arranged through a gap, a battery storage case for storing the batteries, an intake port for sucking and exhausting a cooling medium provided in the battery storage case, and the battery And a spacer provided between the battery storage case and the battery storage case, the spacer has a space between the battery storage case and the first plate-like portion that contacts the battery storage case. interposed to said battery and the second plate-shaped portion abutting, and a support portion which connects the side edges of the first of the side edge of the plate portion second plate-shaped portion, at least A hole is provided at a position where the gap between the batteries of the second plate-like portion contacts, and the gap between the batteries, the second plate-like portion, and the battery storage case via the hole. It is characterized by the communication with the space between.

According to the battery pack, is interposed is a space between the second plate-shaped portion and the battery storage case of the spacer, the second plate of the gap between the space and the battery is the spacer The space can be used as a flow path for the cooling medium by communicating through a hole provided in the shape portion. Even in the case where a spacer is provided between the battery and the battery storage case, a sufficient amount of cooling medium can be allowed to flow, so the flow path between the battery and the battery storage case is narrowed. There is no limit to the amount of cooling medium flowing through. As a result, the cooling medium flowing through the gaps between the batteries can be efficiently sucked and exhausted, and the battery cooling effect can be enhanced.
The present invention provides a plurality of batteries arranged through a gap, a battery storage case for storing the batteries, an intake port for sucking and exhausting a cooling medium provided in the battery storage case, and the battery And a spacer provided between the battery storage case, the spacer includes a plate-like portion that contacts the battery with a space between the battery storage case, A hole is provided at a position where the gap between the batteries of the plate-like portion is in contact, and the gap between the batteries and the space between the plate-like portion and the battery storage case via the hole. The battery storage case includes a pair of opposing side wall portions, and one of the pair of side wall portions has the intake port for sucking the cooling medium flowing in the gap between the batteries. The pair of side wall portions provided The other side wall portion of the inner, and wherein the exhaust port for exhausting said cooling medium flowing through the space between the plate-shaped portion and the battery storage case is provided.

This onset Ming, and a plurality of cells arranged via a gap, and a battery storage case for housing the battery, the battery housing to the intake of the cooling medium provided in the case inlet and exhaust port for exhausting, the In a battery pack including a battery and a spacer provided between the battery storage case, a first space in which the battery is disposed and a circuit board for monitoring the battery are disposed in the battery storage case. A partition plate partitioning into a second space, and the spacer includes a plate-like portion in contact with the battery with a space between the battery storage case and the space between the batteries of the plate-like portion. A hole is provided at a position where the gap is in contact, and the gap between the batteries and the space between the plate-like part and the battery storage case communicate with each other through the hole .

  According to the battery pack, the partition plate can prevent the cooling medium sucked from the air inlet from flowing into the space in which the circuit board is disposed, so that moisture, oil, and dust contained in the cooling medium can be prevented. Failure of the circuit board due to adhesion to the circuit board can be prevented.

  According to the present invention, the spacer is provided between the battery and the battery storage case, and even when the positions of the air inlet and the air outlet provided in the battery storage case are restricted, the spacer that contacts the battery is provided. By using the space interposed between the plate-like portion and the battery storage case as the cooling medium flow path, the cooling medium flow path from the intake port to the exhaust port can be secured, and the battery is efficiently cooled. be able to.

It is a schematic perspective view which shows one Embodiment of the battery storage case of this invention. It is a cross-sectional front view which shows one Embodiment of the battery storage case of this invention. It is a perspective view which shows one Embodiment in which the battery is mounted on the bottom board part which comprises the battery storage case of this invention. It is a perspective view which shows one Embodiment of the base part which comprises the battery storage case of this invention.

  An embodiment of a battery pack according to the present invention will be described with reference to FIGS. In this battery pack, a plurality of batteries 1 are stored in a battery storage case.

  As shown in FIGS. 1 and 2, the battery storage case includes a bottom plate part 25 and side wall parts 21, 22, 23, and 24, an air inlet 21 a is provided on the upper part of the first side wall part 21, and An exhaust port 22 a is provided at a lower portion of the second side wall portion 22 facing the one side wall portion 21, and the spacer 10 is provided between the plurality of batteries 1 and the bottom plate portion 25.

  The intake port 21a is formed in the first side wall portion 21 at a position higher than the upper surface of the battery 1 accommodated over the entire width. The intake port 21a is formed in a long hole shape so that the cooling air W is uniformly sucked over the entire width of the battery storage case, but it may be formed with a large number of small holes. Further, the exhaust port 22a is formed by arranging a large number of small holes in a row or a plurality of rows in parallel so that the cooling air W flows evenly in the battery storage case, but it may be formed in a long hole shape.

  The spacer 10 is, for example, as shown in FIG. 3 and FIG. 4, supporting the side edge of the first plate-like portion 11 having a strip shape and the side edge of the second plate-like portion 12 having a strip shape. 14, the first plate-like portion 11 is in contact with the bottom plate portion 25 of the battery storage case, the second plate-like portion 12 is in contact with the battery 1, and the second plate A first space 15 is interposed between the shape portion 12 and the bottom plate portion 25 of the battery storage case. The position of the battery 1 in the battery storage case is made unstable by the first plate-like part 11 coming into contact with the bottom plate part 25 of the battery storage case and the second plate-like part 12 coming into contact with the battery 1. In addition, the battery can be supported and fixed without using a binding member or a screw.

  A hole 13 is provided in the second plate-like part 12, and the hole 13 is provided at a position where a gap 17 interposed between adjacent batteries 1 is arranged. The gap 17 interposed between the batteries 1 and 1 and the space 15 interposed between the second plate-like portion 12 and the bottom board portion 25 of the battery storage case are holes provided in the second plate-like portion 12. 13 to communicate with. Moreover, as shown in FIG. 4, the hole 13 provided in the second plate-like part 12 may be extended to the support part 14, and the support part 14 may be provided with an opening part.

  The area of the second plate-like portion 12 is preferably at least half of the area of the spacer 10 facing the battery. By making the area of the second plate-shaped portion more than half of the area of the spacer 10 facing the battery, the area where the battery 1 and the spacer 10 abut can be increased, and the position of the battery 1 can be changed. It can be made more stable.

  The spacer 10 is preferably formed of a resin from the viewpoint of securing the insulation between the battery 1 and the battery storage case and reducing the weight of the battery pack. Since the spacer 10 has corners at the connecting portion between the first plate-like portion 11 and the support portion 14 and the connecting portion between the second plate-like portion 12 and the support portion 14, the rigid body is enhanced. ing. Further, when a metal having a high rigid body is used as the material of the spacer 10, the battery 1 and the battery storage case can be obtained by resin coating on the surface of the battery 1, the surface of the inner wall of the battery storage case, or the surface of the spacer 10. Insulating properties can be ensured.

  As shown in FIG. 1, a hood 27 for guiding the cooling air W to the air inlet 21 a is fixed to the outer surface of the first side wall portion 21. The hood 27 is formed in a T-shape in a side view in which the upper part is wide and the middle part and the lower part are narrow in accordance with the width of the intake port 21a formed to the length of almost the entire width of the first side wall part 21. ing.

  A circular ventilation hole 27 a for sucking cooling air W produced by a compressor (not shown) or the like is formed in the lower portion of the hood 27. The vent 27a of the hood 27 is provided at the same height as the attachment portions fixed to the side wall 23 and the side wall 24, and a duct (not shown) is easily connected to the vent 27a. In other words, it is easier to lay out the duct if the duct is piped at a position as low as the mounting portion than the duct is piped at a higher position of the intake port 21a.

  As shown in FIG. 2, the battery storage case includes a partition plate 30 having the same width as that of the first side wall 21 and the second side wall 22, and the second side from the upper side of the air inlet 21 a of the first side wall 21. The side wall 22 is fixed so that an opening 31 is provided between the side wall 22 and the side wall 22. A circuit board 32 is mounted on the partition plate 30, and wiring (not shown) for connecting the circuit board 32 and the battery 1 is passed through the opening 31.

  The battery storage case is configured as described above, and the battery 1 is stored as shown in FIGS. An insulating plate (not shown) is interposed between the wide surfaces (hereinafter referred to as “front surfaces”) of the batteries 1 facing each other. The insulating plates are in contact with the front side portions of the adjacent batteries 1 and 1 on both side portions, are thinly formed in the intermediate portion, and are not in contact with the front intermediate portion of the adjacent battery 1. A gap is formed between the front intermediate portion.

  As shown in FIG. 2, such a battery storage case is set at a predetermined position with the upper opening closed by the lid 40. Then, a duct (not shown) connected to the compressor is connected to the vent 27a of the hood 27, and the cooling air W is sent into the battery storage case from the intake 21a of the side wall 21 when the battery 1 is used.

  The cooling air W flows from the air inlet 21a of the first side wall portion 21 between the partition plate 30 and the upper surface of the battery 1 and then flows into the gap 17 between the batteries to cool the battery 1 from the front. This cooling air W is supplied to the second plate-like portion 12 through the space 16 interposed between the first plate-like portion 11 and the battery 1 and the hole 13 provided in the second plate-like portion 12. The battery 1 flows into the space 15 interposed between the bottom plate portion 25 and the bottom plate 25 to cool the battery 1 from the bottom surface. The cooling air W flows toward the second side wall 22 and is discharged out of the battery pack through the exhaust port 22a. Even if a large amount of cooling air is sucked into the battery pack by using the space 15 interposed between the second plate-like portion 12 and the bottom plate portion 25 as a part of the flow path of the cooling air W, the cooling is performed. Since the wind can be exhausted efficiently, the temperature of the battery 1 can be lowered to a desired temperature in a short time.

  Since the cooling air W thus flows from the top surface of the battery 1 toward the bottom, the circuit board 32 above the partition plate 30 through the opening 31 provided between the partition plate 30 and the second side wall portion 22. It does not flow toward Therefore, even when dust or oil is contained in the cooling air W, the dust or oil does not adhere to the circuit board 32, so that insulation failure does not occur.

  Further, a spacer having the same form as the spacer 10 may be provided between the battery 1 on the side wall portion 21, 22, 23 or 24. Which surface portion of the battery storage case is provided with the spacer having the same form as the spacer 10 may be appropriately determined depending on the positions of the air inlet and the air outlet provided in the battery storage case.

  Further, a sheet member may be interposed between the spacer 10 and the battery 1. For example, the insulation between the battery 1 and the battery storage case can be improved by interposing a resin sheet member, and the position of the battery 1 can be further stabilized by interposing a highly adhesive sheet member. . The spacer may be formed from a plurality of members, and as long as the sheet member interposed between the spacer 10 and the battery 1 is in contact with the battery 1, this sheet member can be regarded as a part of the spacer.

DESCRIPTION OF SYMBOLS 1 ...... Battery 10 ... Spacer 11 ... 1st plate-shaped part 12 ... 2nd plate-shaped part 13 ... Hole 14 ... Supporting part 15 ... 1st space 16 ... 2nd Space 17... Clearance 21... First side wall 21 a .. Intake port 22... Second side wall 22 a ... Exhaust port 25.

Claims (3)

A plurality of batteries arranged through a gap, a battery storage case for storing the battery, an intake port for exhausting and exhausting a cooling medium provided in the battery storage case, the battery and the battery storage In the battery pack provided with the spacer provided between the case,
The spacer, the a first plate-like portion abutting on the battery housing case, and the second plate-like portion interposed space in contact with the battery between the battery housing case, the first plate A support portion that connects the side edge of the second plate-like portion and the side edge of the second plate-like portion ;
A hole is provided at a position where the gap between the batteries of at least the second plate-shaped portion contacts,
The battery pack, wherein the gap between the batteries communicates with the space between the second plate-like part and the battery storage case through the hole. A plurality of batteries arranged through a gap, a battery storage case for storing the battery, an intake port for exhausting and exhausting a cooling medium provided in the battery storage case, the battery and the battery storage In the battery pack provided with the spacer provided between the case,
The spacer includes a plate-like portion that is in contact with the battery with a space between the battery storage case, and a hole is provided at a position where the gap between the batteries contacts the plate-like portion, Via the hole, the gap between the batteries communicates with the space between the plate-like part and the battery storage case,
The battery storage case includes a pair of opposing side wall portions, and one of the pair of side wall portions is provided with the intake port for sucking the cooling medium flowing in the gap between the batteries, The battery pack, wherein the other side wall portion of the pair of side wall portions is provided with the exhaust port for exhausting the cooling medium flowing in a space between the battery storage case and the plate-like portion. . A plurality of batteries arranged through a gap, a battery storage case for storing the battery, an intake port for exhausting and exhausting a cooling medium provided in the battery storage case, the battery and the battery storage In the battery pack provided with the spacer provided between the case,
A partition plate for partitioning the inside of the battery storage case into a first space in which the battery is disposed and a second space in which a circuit board for monitoring the battery is disposed;
The spacer includes a plate-like portion that is in contact with the battery with a space between the battery storage case, and a hole is provided at a position where the gap between the batteries contacts the plate-like portion, A battery pack, wherein a gap between the batteries and a space between the plate-like part and the battery storage case communicate with each other through a hole.

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