JP7135348B2 - battery device - Google Patents

Description

The disclosure herein relates to battery devices.

The power supply device described in Patent Literature 1 has a thermally conductive sheet that is compressed and deformed between the prismatic battery and the cooling plate and adheres to the bottom surface of the prismatic battery and the surface of the cooling plate in surface contact. A plurality of stacked prismatic batteries are housed inside a potting case and supported on the sides by the potting case to be integrated. The bottom of the potting case is formed with an opening extending over the entire stacking direction of the plurality of prismatic batteries. The thermally conductive sheet is fixed by being sandwiched between the prismatic battery and the cooling plate while being fitted in the opening.

International Publication No. 2012/165493

However, the heat-conducting sheet of Patent Document 1 is only fixed in the stacking direction of the plurality of prismatic batteries by adhesion force due to being sandwiched between the prismatic batteries and the cooling plate. Therefore, the heat conductive sheet is not sufficiently supported so as not to move in the stacking direction of the plurality of prismatic batteries. In particular, when a plurality of thermally conductive sheets are arranged side by side in the stacking direction, each sheet is short in the stacking direction, so that it is easy to move.

An object of the disclosure in this specification is to provide a battery device capable of suppressing displacement in the battery stacking direction with respect to a gel-like and easily deformable heat conductive member.

The multiple aspects disclosed in this specification employ different technical means to achieve their respective objectives. In addition, the symbols in parentheses described in the claims and this section are an example showing the correspondence relationship with the specific means described in the embodiment described later as one aspect, and limit the technical scope is not.

One of the disclosed battery devices includes a plurality of stacked battery cells (2), a heat dissipation member (10; 110) that absorbs and dissipates heat from the battery cells, and a heat dissipation member that dissipates heat from the battery cells. A thermally conductive member (9) interposed between the battery cell and the heat dissipating member so as to be movable in the battery member and containing a thermally conductive gel-like material and easily deformable (9), and a stack of the battery cell Facing portions (30, 40) facing the side surfaces (22) of the battery cell on both sides in the direction, and holding the heat conductive member on one end side of the facing portion, the heat conductive member in the stacking direction of the battery cells. a regulating member (3, 4; 104) having holding portions (31, 41) that regulate movement. The holding portion (41) is a portion extending from both sides of the heat conductive member in the stacking direction so as to cover the lower surface (21) of the battery cell, and is spaced apart in at least one of the width direction and the stacking direction of the holding portion. It has a plurality of aligned pores (42) or apertures.

According to this battery device, the holders are provided for holding the easily deformable thermally conductive member containing the gel material on both sides in the battery stacking direction. According to the regulating member having this holding portion, it is possible to regulate the movement of the thermally conductive member, which is likely to deform and move between the battery cell and the heat radiating member, in the battery stacking direction. It contributes to appropriate heat transfer to the heat dissipating member. This battery device can suppress positional displacement in the battery stacking direction with respect to the gel-like and easily deformable thermally conductive member.
One of the disclosed battery devices includes a plurality of stacked battery cells (2), a heat dissipation member (10; 110) that absorbs and dissipates heat from the battery cells, and heat from the battery cells. A thermally conductive member (9) which is movably interposed between the battery cell and the heat radiating member and which includes a thermally conductive gel-like material and is easily deformable; The opposing portions (30, 40) facing the side surfaces (22) of the battery cells on both sides in the stacking direction hold the thermally conductive member at one end side of the opposing portion to prevent movement of the thermally conductive member in the stacking direction. a regulating member (3, 4; 104) having a regulating holding portion (31, 41). The holding portion (41) is a portion extending from both sides of the heat conductive member in the stacking direction so as to cover the lower surface (21) of the battery cell, and is spaced apart in at least one of the width direction and the stacking direction of the holding portion. It has a plurality of aligned pores (42) or apertures.
One of the disclosed battery devices includes a plurality of stacked battery cells (2), a heat dissipation member (10; 110) that absorbs and dissipates heat from the battery cells, and heat from the battery cells. A thermally conductive member (9) which is movably interposed between the battery cell and the heat radiating member and which includes a thermally conductive gel-like material and is easily deformable; The opposing portions (30, 40) facing the side surfaces (22) of the battery cells on both sides in the stacking direction hold the thermally conductive member at one end side of the opposing portion to prevent movement of the thermally conductive member in the stacking direction. a regulating member (3, 4; 104) having a regulating holding portion (31, 41). The regulating member includes a second regulating member (4; 104) having second facing portions (40) facing the side surfaces of the battery cells on both sides in the stacking direction, and a second facing portion on both sides in the stacking direction. a first regulating member (3) having a first facing portion (30) facing the side surface of the battery cell, and the second regulating member is provided with the thermally conductive member from both sides in the stacking direction of the battery cell. A second holding part (41) extending to cover the lower surface (21) of the second holding part (41) and having a plurality of pores or openings spaced apart in at least one of the width direction and the stacking direction of the second regulating member and the first regulating member is a portion that contacts the thermally conductive member from both sides of the second holding portion in the stacking direction, and has a plurality of thin strips arranged at intervals in the width direction of the first regulating member. It has a first retainer (31) with a gap or aperture.
One of the disclosed battery devices includes a plurality of stacked battery cells (2), a heat dissipation member (10; 110) that absorbs and dissipates heat from the battery cells, and heat from the battery cells. A thermally conductive member (9) which is movably interposed between the battery cell and the heat radiating member and which includes a thermally conductive gel-like material and is easily deformable; The opposing portions (30, 40) facing the side surfaces (22) of the battery cells on both sides in the stacking direction hold the thermally conductive member at one end side of the opposing portion to prevent movement of the thermally conductive member in the stacking direction. a regulating member (3, 4; 104) having a regulating holding portion (31, 41). The heat dissipating member is a heat exchanger that exchanges heat with a fluid, and includes a restraining member (7; 107) that restrains the plurality of battery cells and the restraining member by applying compressive force in the stacking direction.

It is the figure which showed the structure of the battery apparatus of 1st Embodiment. It is the perspective view which showed the 1st control member. It is the perspective view which expanded and showed the 1st holding|maintenance part and slit of a 1st control member. FIG. 4 is a cross-sectional view showing a state in which a plurality of first holding parts hold a thermally conductive member; It is the perspective view which showed the 2nd control member. It is the perspective view which expanded and showed the 2nd holding|maintenance part and slit of a 2nd control member. FIG. 4 is a cross-sectional view showing a state in which a second holding portion holds a thermally conductive member; FIG. 11 is a cross-sectional view showing a state in which a thermally conductive member is held by a second holding portion of the second embodiment; FIG. 7 is a cross-sectional view showing the configuration of a battery device according to a third embodiment;

A plurality of modes for carrying out the present disclosure will be described below with reference to the drawings. In each form, the same reference numerals may be given to the parts corresponding to the matters described in the preceding form, and overlapping explanations may be omitted. When only a part of the configuration is described in each form, the previously described other forms can be applied to other parts of the configuration. Not only combinations of parts that are explicitly stated that combinations are possible in each embodiment, but also partial combinations of embodiments even if they are not explicitly stated unless there is a particular problem with the combination. is also possible.

(First embodiment)
The battery device 1 of the first embodiment is a device having a structure capable of dissipating heat from a plurality of secondary batteries stacked in layers to a heat dissipating member via a heat conductive member. The battery device 1 is used, for example, in a hybrid vehicle that uses a combination of an internal combustion engine and a motor that is driven by electric power charged in a battery as a running drive source, an electric vehicle that uses a motor as a running drive source, and the like. A plurality of battery cells 2 included in the battery device 1 are, for example, nickel-hydrogen secondary batteries, lithium-ion secondary batteries, or organic radical batteries.

A first embodiment will be described with reference to FIGS. 1 to 4. FIG. In each figure, the thickness direction of the battery cells 2 is the stacking direction of the battery cells 2 in the battery stack, and is also referred to as the battery stacking direction. The direction orthogonal to both the battery stacking direction and the vertical direction is the width direction of the battery cells 2 .

The battery device 1 is controlled by electronic components used for charging and discharging a plurality of battery cells 2 or for temperature control. The battery device 1 is formed by integrating a plurality of electrically connected and stacked battery cells 2 by binding them in the battery stacking direction. Alternatively, the battery device 1 may be housed in a housing. The aforementioned electronic components are, for example, a DC/DC converter, a motor that drives a blowing member, electronic components controlled by an inverter, various electronic control devices, etc., and are adjusted by a power element that is, for example, a switching power supply device. It is a component that is powered by electricity. The battery device 1 may be a device including such electronic components.

The battery cells 2 constituting the battery stack are unit cells having a rectangular outer case made of metal. This prismatic unit cell is a rectangular parallelepiped whose outer peripheral surface is covered with an exterior case made of, for example, aluminum, an aluminum alloy, or the like. In each battery cell 2, two electrode terminals 20 consisting of a positive electrode terminal and a negative electrode terminal respectively protrude from the upper surface of the exterior case, and the protruding direction is an upward direction perpendicular to the battery stacking direction. The exterior case of the battery cell 2 may be made of, for example, resin instead of metal. Moreover, the battery cell 2 may use the film which laminated resin and aluminum foil as an exterior case.

The battery stack is an assembly in which a predetermined number of battery cells 2 and insulating spacer members 5 are alternately stacked, and is sandwiched between both ends in the stacking direction by restraining bands 7, and a restraining force directed inward is applied to integrate them. configured as follows. The battery stack further includes a regulating member between battery cells 2 adjacent to each other in the battery stacking direction. The regulating member has opposing portions provided to face the side surfaces 22 of the battery cells 2 on both sides of the battery cells 2 in the battery stacking direction. A facing portion of the regulating member is provided between the battery cell 2 and the spacer member 5 . Therefore, between the spacer members 5 that are adjacent to each other in the battery stacking direction, the battery cells 2 and opposing portions of the regulating members arranged on both sides of the battery cells 2 are present. The regulating member further has a holding portion that holds the thermally conductive member 9 at least in the battery stacking direction at the lower portion, which is one end side of the opposing portion.

The heat conductive member 9 is interposed between the battery cell 2 and the heat radiation member 10 so that the heat of the battery cell 2 can move to the heat radiation member 10, and the heat from the battery cell 2 to the heat radiation member 10 is transferred. It is an easily deformable member provided on the moving path. The thermally conductive member 9 has an easily deformable container containing a thermally conductive gel material, or has a structure formed of the thermally conductive gel material itself. The heat dissipation member 10 is a heat radiator capable of absorbing and dissipating heat from the battery cells 2 . The heat dissipating member 10 is a heat sink, fins, or the like having a large surface area and heat capacity, and is made of a material having high thermal conductivity. The heat radiating member 10 is in contact with another member at the side opposite to the side in contact with the heat conductive member 9, and is configured to be capable of dissipating heat to the other member. Further, the heat radiating member 10 is configured to radiate heat to the outside atmosphere from portions other than the portion in contact with the heat conductive member 9 . In the battery device 1, the heat of the battery cells 2 is absorbed through the regulating member and the heat conductive member 9 by radiating heat to the outside from the heat radiating member 10, thereby effectively cooling each battery cell 2. can be done.

A restraining structure of the battery device 1 will be described. As shown in FIG. 1, the battery device 1 includes a plurality of battery cells 2, a spacer member 5 and a regulation member interposed between adjacent battery cells 2, a heat conductive member 9, a heat dissipation member, and a set of end plates 6. , restraining bands 7 or the like that provide compressive forces against a set of end plates 6 from both sides.

A pair of end plates 6 are plate-like members provided at both ends in the battery stacking direction of the battery stack including the battery cells 2, the spacer members 5, and the regulating members. The restraint band 7 is a belt-shaped member surrounding the outer periphery of the laminated structure including the battery laminate and the pair of end plates 6 . The battery device 1 is restrained by two restraining bands 7 spaced apart in the vertical direction. A restraining band 7 is a restraining member fixed by a rivet 8 so as to maintain a compressive force on the battery stack. Also, the rivets 8 may be replaced with fastening means such as bolts and nuts, or fixing means such as welding. The restraint band 7 is made of a material having excellent strength, such as metal or hard resin, so that the plurality of battery cells 2 and the like can be pressed together with a stable force.

Next, the restricting member will be described with reference to FIGS. 2 to 7. FIG. The battery device 1 includes a first restricting member 3 and a second restricting member 4 provided between adjacent spacer members 5 and 5 . The first regulating member 3 and the second regulating member 4 are regulating members capable of achieving the purpose disclosed in the specification. It has a function of restricting the movement so that it is not displaced in the stacking direction of the battery. The first restricting member 3 is a member adjacent to the spacer member 5 . Between the spacer member 5 and the battery cell 2, a plurality of first regulating members 3 are arranged side by side in the battery stacking direction. The second restricting member 4 is a member provided closer to the battery cell 2 than the first restricting member 3 and is adjacent to the battery cell 2 . The plurality of first regulating members 3, one first regulating member 3 and second regulating member 4, and the plurality of first regulating members 3 and second regulating member 4 respectively constitute a plurality of regulating members arranged in the battery stacking direction. is doing.

As shown in FIGS. 2 and 3, the first regulating member 3 has a first facing portion 30 facing the side surface 22 of the battery cell 2 on both sides in the battery stacking direction, and a lower end portion of the first facing portion 30. and a first holding portion 31 extending downward and toward the battery cell 2 side. The first facing portion 30 is a plate-like portion that extends in the vertical direction and the width direction of the battery cell 2 and has a shape that faces substantially the entire side surface 22 that is the main surface of the battery cell 2 . The first holding portion 31 is in contact with the thermally conductive member 9 at least from both sides in the battery stacking direction, and the thermally conductive member 9 slides in the battery stacking direction, thereby significantly reducing heat transfer from the battery cell 2. regulate things.

The first holding portion 31 is formed in a curved shape so that it is gradually located on the battery cell 2 side or the heat conductive member 9 side as it approaches the lower heat dissipating member from the lower end portion of the first facing portion 30 . . With this configuration, the first holding portion 31 functions as a holding wall that holds the thermally conductive member 9 from below on each of both sides in the battery stacking direction. With this configuration, the first holding portion 31 further functions as a holding wall that holds both side portions of the heat conductive member 9 in the battery stacking direction over a wide range in the vertical direction.

The first holding portion 31 is provided so as to contact the heat dissipation member 10 . When the side surface 22 of the battery cell 2 and the first facing portion 30 are provided so as to be heat transferable, the heat of the battery cell 2 is transferred from the first holding portion 31 via the first facing portion 30 to the heat dissipation member. A heat transfer path can be constructed that travels to 10 . In addition, a heat transfer path can be constructed in which the heat of the battery cell 2 moves from the first holding portion 31 to the heat dissipation member 10 via the heat conductive member 9 .

The first holding portion 31 has a plurality of slits 32 arranged at intervals in its width direction or the width direction of the battery cell 2 . The slit 32 has an elongated shape in a direction intersecting or orthogonal to the aforementioned width direction. The slit 32 may be an opening penetrating the first holding portion 31 . The narrow gap 32 may be formed by a notch or a slit whose longitudinal end reaches the tip of the first holding portion 31 . With this configuration, a part of the thermally conductive member 9 that is in close contact with the first holding portion 31 fits into the slit 32 and is held so as to protrude downward from the slit 32 .

As shown in FIG. 4 , the battery device 1 has a plurality of first regulating members 3 arranged in the battery stacking direction on each side of the thermally conductive member 9 . In the plurality of first regulating members 3, the narrow gap 32 provided in the first holding portion 31 on one side and the narrow gap 32 provided in the first holding portion 31 on the other side, which are adjacent in the battery stacking direction, are , are displaced in the width direction of the first holding portion 31 . In other words, the plurality of narrow gaps 32 of the plurality of first regulating members 3 are arranged in a labyrinth shape in the battery stacking direction. With this configuration, the portion of the thermally conductive member 9 that is fitted into the narrow gap 32 and held so as to protrude is aligned in the battery stacking direction while being displaced in the width direction of the first holding portion 31 . In other words, the portions of the thermally conductive member 9 that fit into the narrow gaps 32 are arranged in a zigzag pattern with respect to the battery stacking direction. In this manner, when an external force acts to move the thermally conductive members 9 held by the plurality of first holding portions 31 in the battery stacking direction, the plurality of heat conductive members 9 arranged in a zigzag pattern with respect to the battery stacking direction. The narrow gap 32 can inhibit the flow of the thermally conductive member 9 . With such a configuration in which the plurality of slits 32 are arranged in the stacking direction of the battery, the function of holding the heat conductive member 9 by the plurality of slits 32 can be strengthened, so that the holding function of the plurality of first regulating members 3 can be enhanced. can be done.

As shown in FIGS. 5 and 6, the second regulating member 4 has second facing portions 40 facing the side surfaces 22 of the battery cells 2 on both sides in the battery stacking direction, and heat conductive members 9 in the battery stacking direction. has a second holding portion 41 extending from both sides of the battery cell 2 so as to cover the lower surface 21 of the battery cell 2 . The second facing portion 40 is a plate-like portion that extends in the vertical direction and the width direction of the battery cell 2 and has a shape that faces substantially the entire side surface 22 that is the main surface of the battery cell 2 . The second holding portion 41 is in contact with the thermally conductive member 9 at least at positions directed inward from both sides in the battery stacking direction, so that the thermally conductive member 9 slides in the battery stacking direction and is removed from the battery cell 2 . Regulates that the heat transfer of is significantly reduced.

The second holding portions 41 are portions extending from both sides of the heat conductive member 9 in the battery stacking direction so as to cover the lower surfaces 21 of the battery cells 2 . The second holding portion 41 is a portion extending in the battery stacking direction so as to support the heat conductive member 9 from below. With such a configuration, the second holding portion 41 serves as a holding wall that penetrates the inside of the heat conductive member 9 in the battery stacking direction and the width direction and holds the heat conductive member 9 by supporting it from below. Function.

The second holding portion 41 is formed in a wave shape extending in the battery stacking direction. In other words, the second holding portion 41 is formed such that mountain-shaped portions projecting toward the battery cells 2 and valley-shaped portions projecting toward the heat dissipation member 10 are alternately arranged in the battery stacking direction. . With this configuration, when an external force acts to move the thermally conductive member 9 held by the second holding portion 41 in the battery stacking direction, the second holding portion 41 having a shape that meanders up and down, The flow of the heat conductive member 9 can be inhibited. It can be said that the second holding portion 41 also functions as an anchor that holds the thermally conductive member 9 .

The second holding portion 41 is provided so as to contact the heat dissipation member 10 . When the side surface 22 of the battery cell 2 and the second facing portion 40 are provided so as to be heat transferable, the heat of the battery cell 2 is transferred from the second holding portion 41 via the second facing portion 40 to the heat dissipation member. A heat transfer path can be constructed that travels to 10 . In addition, a heat transfer path can be constructed in which the heat of the battery cell 2 moves from the second holding portion 41 to the heat dissipation member 10 via the heat conductive member 9 . The second holding portion 41 is provided so as to contact the bottom surface 21 of the battery cell 2 . With this configuration, it is possible to build a heat transfer path through which the heat of the battery cell 2 is transferred to the heat dissipation member 10 via the second holding portion 41 .

The second holding portion 41 further has a plurality of pores 42 arranged at intervals in both the width direction of the second regulating member 4 and the battery stacking direction. The plurality of pores 42 may be arranged at intervals in the width direction of the second regulating member 4 or the battery stacking direction. The pores 42 are provided between the ridges (vertices) and the valleys (vertices) of the wave shape of the second holding portion 41, and are elongated in the direction from one side to the other. The second holding portion 41 has pores 42 for all the plate-like portions forming the corrugated shape. The pore 42 may be an opening having a shape other than the pore penetrating the second holding portion 41 . With this configuration, a part of the thermally conductive member 9 held by the second holding portion 41 is fitted into the hole 42, and the function of further holding the thermally conductive member 9 by the hole 42 is improved. .

As shown in FIG. 6 , the second regulating member 4 has a portion of the thermally conductive member 9 where the second holding portion 41 is in contact with the lower surface 21 of the battery cell 2 and the heat radiating member 10 and protrudes from the hole 42 . The thermally conductive member 9 is held in contact with the lower surface 21 of the battery cell 2 and the heat radiating member 10 . With this configuration, the second restricting member 4 prevents the thermally conductive member 9 from flowing out or being displaced at least in the battery stacking direction, and ensures heat transfer from the battery cell 2 to the heat dissipating member 10. contributes to doing

Next, effects brought about by the battery device 1 of the first embodiment will be described. The battery device 1 includes a plurality of stacked battery cells 2, a heat dissipation member 10 for absorbing and dissipating heat from the battery cells 2, and a heat dissipation member 10 so that the heat from the battery cells 2 can move to the heat dissipation member 10. A heat-conducting member 9 interposed between the battery cell 2 and the heat-dissipating member 10 is provided. The heat-conducting member 9 is a deformable member containing a heat-conducting gel-like material. The battery device 1 has a facing portion facing the side surface 22 of the battery cell 2 on both sides in the battery stacking direction, and a heat conductive member 9 held at one end side of the facing portion. a regulating member having a holding portion that regulates the movement of the

According to this configuration, the restricting member can restrict the movement in the battery stacking direction of the thermally conductive member 9 which is easily deformed and moves between the battery cell 2 and the heat dissipating member 10 . Appropriate heat transfer paths to heat dissipating member 10 via member 9 can be implemented. According to this configuration, in order to implement an appropriate heat transfer path, the battery device 1 is capable of suppressing misalignment in the battery stacking direction with respect to the easily deformable heat conductive member 9, or the outflow of the gel material to the outside is prevented. A suppressible battery device 1 can be provided.

The first holding portion 31 of the first regulating member 3 is a portion that contacts the heat conductive member 9 at least from both sides in the battery stacking direction, and has a plurality of narrow gaps 32 that are arranged at intervals in the width direction of the holding portion. or has an aperture. According to this configuration, the easily deformable heat conductive member 9 can be deformed so as to fit into the plurality of slits 32 or openings while being held in contact with the holding portion from both sides in the battery stacking direction. As a result, even if a part of the thermally conductive member 9 is fitted into the plurality of slits 32 or openings, the holding force for holding the thermally conductive member 9 can be increased, and the position of the thermally conductive member 9 can be improved. Contributes to suppressing misalignment.

The battery device 1 has a plurality of first regulating members 3 arranged in the battery stacking direction. The slits 32 or openings of the first holding portions 31 adjacent in the battery stacking direction are provided so as to be shifted in the width direction of the holding portion with respect to the slits 32 or openings adjacent in the battery stacking direction. . According to this configuration, the thermally conductive member 9 is held by the plurality of first holding portions 31 from both sides in the battery stacking direction, and can be deformed so as to fit into the plurality of slits 32 or openings. Furthermore, since the positions of the slits 32 or the openings adjacent to each other in the battery stacking direction are shifted in the width direction, the heat conductive members are formed at positions shifted in the width direction in the first holding portions 31 adjacent to each other in the battery stacking direction. 9 can be partially deformed and held. As a result, the heat conductive member 9 can be deformed and held over a wide range in the width direction by the narrow gaps 32 or the openings of the plurality of first holding portions 31 arranged in the battery stacking direction. Contributes to suppression of misregistration.

The first holding portion 31 of the first restricting member 3 is formed in a curved shape such that the closer it is to the heat radiating member 10 , the closer it is to the heat conductive member 9 side. According to this configuration, the first holding portions 31 can hold the thermally conductive member 9 from the heat radiating member 10 side on both sides in the battery stacking direction. As a result, the holding force for holding the thermally conductive member 9 can be increased, which contributes to suppressing the displacement of the thermally conductive member 9 .

The first holding portion 31 is in contact with the heat dissipation member 10 . According to this configuration, the first holding portion 31 can restrict movement of the heat conductive member 9 in the battery stacking direction, and can increase heat transfer to the heat dissipation member 10 via the first holding portion 31 .

The second holding portion 41 of the second regulating member 4 is a portion extending from both sides of the heat conductive member 9 in the battery stacking direction so as to cover the lower surface 21 of the battery cell 2 . The second holding portion 41 has a plurality of pores 42 or openings arranged at intervals in at least one of the width direction and the battery stacking direction. According to this configuration, the easily deformable heat conductive member 9 can be held by the second holding portion 41 over substantially the entirety in the battery stacking direction. Furthermore, since the plurality of pores 42 or openings are arranged in at least one of the width direction and the battery stacking direction, the heat conductive member can be formed in the width direction or the battery stacking direction, or in both the width direction and the battery stacking direction. 9 fits into the hole 42 and the like over a wide range. These effects can increase the holding force that holds the thermally conductive member 9 over a wide range, and contribute to suppressing the displacement of the thermally conductive member 9 .

The second holding portion 41 has a wave shape that advances in the battery stacking direction. According to this configuration, the heat conductive member 9 can be held in a deformed state following the wave-shaped second holding portion 41 over substantially the entire battery stacking direction, so the holding force for holding the heat conductive member 9 is increased. This contributes to suppression of positional deviation of the thermally conductive member 9 .

The second holding portion 41 has pores 42 or openings for all plate-like portions forming a corrugated shape. According to this configuration, the thermally conductive member 9 can be held in a deformed state by the corrugated plate portion and the pores 42 or the openings over the entire battery stacking direction of the thermally conductive member 9 . The effect of restraining the movement of the member 9 can be further enhanced.

Further, the pores 42 are formed so as to be elongated in the wave-like wavelength direction of the second holding portion 41 . According to this configuration, since the pores 42 are elongated in the wave-shaped wavelength direction, the thermally conductive member 9 is spread over a wide range in the battery stacking direction so as not to be obstructed by the portion of the thermally conductive member 9 that fits into the pores 42 . It can be held by being deformed so as to follow the waveform of the second holding portion 41 .

The second holding portion 41 is provided to support the heat conductive member 9 from below. According to this configuration, the thermally conductive member 9 can be held in such a state that the thermally conductive member 9 is placed on the second holding portion 41 . Furthermore, since the thermally conductive member 9 placed on the second holding portion 41 is partially fitted into the plurality of pores 42 or openings, movement of the thermally conductive member 9 with respect to the second holding portion 41 is suppressed. can increase the effectiveness of Furthermore, when the second holding portion 41 is in contact with the heat dissipation member 10, the heat of the battery cell 2 is transferred from the heat conductive member 9 to the heat dissipation member 10 via the second holding portion 41. By constructing the heat path, the heat radiation effect to the heat radiation member 10 can be enhanced.

The second holding portion 41 is also in contact with the bottom surface 21 of the battery cell 2 . According to this configuration, the heat transfer path for transferring the heat of the battery cells 2 to the heat dissipating member 10 via the second holding portion 41 is constructed, thereby enhancing the heat dissipating effect to the heat dissipating member 10 .

The battery device 1 includes a second regulating member 4 having second facing portions 40 facing the side surfaces 22 of the battery cells 2 on both sides in the battery stacking direction, and facing the side surfaces 22 of the battery cells 2 with the second facing portions 40 therebetween. a first regulating member 3 having a first facing portion 30 that The second regulating member 4 has second holding portions 41 that extend from both sides of the heat conductive member 9 in the battery stacking direction so as to cover the lower surfaces 21 of the battery cells 2 . The second holding portion 41 has a plurality of pores 42 or openings arranged at intervals in at least one of the width direction of the second regulating member 4 and the battery stacking direction. The first regulating member 3 has a first holding portion 31 that is a portion that contacts the heat conductive member 9 from both sides of the second holding portion 41 in the battery stacking direction. The first holding portion 31 has a plurality of slits 32 or openings arranged at intervals in the width direction of the first restricting member 3 .

According to this configuration, the heat conductive member 9 can be held by the first holding portions 31 from both sides in the battery stacking direction, and can be held by the second holding portions 41 over substantially the entirety in the battery stacking direction. Further, a portion of the thermally conductive member 9 is fitted into the plurality of narrow gaps 32 or openings of the first holding portion 31 and the plurality of pores 42 or openings of the second holding portion 41, whereby heat conduction is achieved. It is possible to provide the battery device 1 that increases the holding force for holding the thermally conductive member 9 and contributes to suppressing the positional deviation of the thermally conductive member 9 .

At least one of the first restricting member 3 and the second restricting member 4 is a plate-like member made of metal. At least one of the first restricting member 3 and the second restricting member 4 may be a plate-shaped member made of a material having high thermal conductivity, such as a metal-containing resin product or carbon. According to this configuration, it is possible to provide the battery device 1 in which the thermal resistance in the heat transfer path from the battery cell 2 to the heat dissipation member 10 is suppressed by the first regulating member 3 and the second regulating member 4 having low thermal resistance.

The heat radiating member 10 is a heat exchanger that exchanges heat with fluid. The battery device 1 includes a binding band 7 that applies a compressive force in the battery stacking direction to the plurality of battery cells 2 and the regulation members to bind them. According to this configuration, since the position of the regulating member can be reliably fixed by the compressive force, the function of the regulating member to hold the thermally conductive member 9 can be strengthened, which contributes to suppressing the displacement of the thermally conductive member 9 . According to this configuration, it is possible to establish a heat path through which the heat of the battery cell 2 moves from the side surface 22 to the holding section via the facing portion of the regulating member and a heat path through which the heat moves from the lower surface 21 to the holding section. And the heat transferred from the heat conductive member 9 to the heat dissipating member 10 can be heat exchanged with the fluid. Thereby, the battery device 1 with improved battery cooling performance can be provided.

(Second embodiment)
A second restricting member 104 of the second embodiment will be described with reference to FIG. In FIG. 8, components having the same configuration as in the first embodiment are denoted by the same reference numerals and have similar actions and effects. Configurations, actions, and effects that are not specifically described in the second embodiment are the same as in the first embodiment, and only points that differ from the first embodiment will be described.

As shown in FIG. 8, the second regulating member 104 differs from the second regulating member 4 in that the wavy portion of the second holding portion 41 closest to the lower end of the second opposing portion 40 has no pores 42 formed therein. differ from each other. The second regulating member 104 has a function of wrapping and holding the thermally conductive member 9 from both sides in the battery stacking direction like the first holding portion 31 of the first regulating member 3 . In other words, the second restricting member 104 functions as a restricting member combining the first restricting member 3 and the second restricting member 4 .

(Third embodiment)
A battery device according to the third embodiment will be described with reference to FIG. In FIG. 9, components having the same configuration as those of the above-described embodiment are denoted by the same reference numerals, and have similar actions and effects. Configurations, actions, and effects that are not specifically described in the third embodiment are the same as those in the above-described embodiment, and only differences from the above-described embodiment will be described.

As shown in FIG. 9, the battery device of the third embodiment includes a heat radiating member 110 through which the heat medium supplied by the heat medium conveying device flows through the internal passage. The heat dissipating member 110 is a heat medium and a heat exchanger that flow through the internal passage. When the heat transfer member 110 is cooled by the supply of the heat medium, the heat transferred via the holding portion and the heat conductive member 9 is absorbed by the heat dissipation member 110 to cool each battery cell 2. can be done. Various fluids can be used as the heat medium, such as air, water, and refrigerant. When the heat medium is a refrigerant, the refrigerant flowing through the refrigeration cycle can also be used.

The restraint band 107 applies a compressive force in the battery stacking direction to the battery cell 2, the first restraint member 3, and the second restraint member 4 while being in contact with the first restraint member 3 and the second restraint member 4, thereby restraining the battery. Constrains the entire module. A lower end portion of the binding band 107 is in contact with the heat dissipation member 110 . With these configurations, the heat of the battery cell 2 can also move to the restraining band 107 via the first restraining member 3 and the second restraining member 4, and is released from the restraining band 107 to the outside, and the heat of the heat dissipating member 110 move to

The battery device of the third embodiment includes a smoke exhaust duct 11 integrally formed with the busbar module. The busbar module is a member that supports busbars that electrically connect the electrode terminals 20 of the adjacent battery cells 2 . The smoke exhaust duct 11 is installed in contact with the top surface of the battery cell 2 . With such a configuration, the heat of the battery cells 2 can also move to the smoke exhaust duct 11 and the busbar module, and can be released to the outside from the smoke exhaust duct 11 and the busbar module.

According to the above configuration, the battery device of the third embodiment has a wide variety of heat radiation paths from the battery cells 2, which contributes to the reduction of thermal resistance.

(Other embodiments)
The disclosure in this specification is not limited to the illustrated embodiments. The disclosure encompasses the illustrated embodiments and variations thereon by those skilled in the art. For example, the disclosure is not limited to the combination of parts and elements shown in the embodiments, and various modifications can be made. The disclosure can be implemented in various combinations. The disclosure can have additional parts that can be added to the embodiments. The disclosure encompasses abbreviations of parts and elements of the embodiments. The disclosure encompasses the permutations, or combinations of parts, elements between one embodiment and another. The disclosed technical scope is not limited to the description of the embodiments. The disclosed technical scope is indicated by the description of the claims, and should be understood to include all changes within the meaning and range of equivalents to the description of the claims.

The battery stack in the above embodiment is a battery assembly in which the battery cells 2 and the spacer members 5 are alternately stacked, but the battery stack is not limited to this form. A battery device capable of achieving the objects disclosed in the specification does not need to have the spacer member 5 described in the above embodiment between the adjacent battery cells 2 .

DESCRIPTION OF SYMBOLS 1... Battery apparatus, 2... Battery cell, 3... 1st regulation member (regulation member)
4,104...Second restricting member (regulating member), 7,107...Restricting band (restraining member)
9 Thermal conductive member 10, 110 Heat dissipation member 21 Bottom surface 22 Side surface 30 First facing portion (facing portion) 31 First holding portion (holding portion)
32...Slit, 40...Second facing portion (facing portion), 41...Second holding portion (holding portion)
42 ... Pores

Claims (15)

a plurality of stacked battery cells (2);
a heat dissipation member (10; 110) that absorbs and dissipates heat from the battery cell;
Thermally conductive gel material having thermal conductivity is interposed between the battery cell and the heat dissipating member so that the heat of the battery cell can be transferred to the heat dissipating member. a member (9);
Facing portions (30, 40) facing the side surfaces (22) of the battery cell on both sides in the stacking direction of the battery cell, and one end side of the facing portion holding the thermally conductive member in the stacking direction a regulating member (3, 4; 104) having a holding portion (31, 41) for regulating movement of the thermally conductive member;
with
The holding portion (31) is a portion that contacts the thermally conductive member at least from both sides in the lamination direction, and includes a plurality of slits (32) or openings that are arranged at intervals in the width direction of the holding portion. A battery device having holes . Having a plurality of the regulating members arranged in the stacking direction,
3. The slits or the openings of the holding portions adjacent in the stacking direction are provided so as to be shifted in the width direction with respect to the slits or the openings adjacent in the stacking direction. 2. The battery device according to 1. 3. The battery device according to claim 1 , wherein the holding portion is formed in a curved shape such that the closer it is to the heat-dissipating member, the closer it is to the heat-conducting member . The battery device according to any one of claims 1 to 3, wherein the holding portion is in contact with the heat dissipation member. a plurality of stacked battery cells (2);
a heat dissipation member (10; 110) that absorbs and dissipates heat from the battery cell;
Thermally conductive gel material having thermal conductivity is interposed between the battery cell and the heat dissipating member so that the heat of the battery cell can be transferred to the heat dissipating member. a member (9);
Facing portions (30, 40) facing the side surfaces (22) of the battery cell on both sides in the stacking direction of the battery cell, and one end side of the facing portion holding the thermally conductive member in the stacking direction a regulating member (3, 4; 104) having a holding portion (31, 41) for regulating movement of the thermally conductive member;
with
The holding portion (41) is a portion extending from both sides of the heat conductive member in the stacking direction so as to cover the lower surface (21) of the battery cell. A battery device having a plurality of spaced apart pores (42) or apertures for at least one of them . 6. The battery device according to claim 5, wherein the holding portion has a wavy shape with the stacking direction as the wavelength direction . 7. The battery device according to claim 6 , wherein said holding portion has said fine holes or said openings in all plate-like portions forming said wave shape . 8. The battery device according to claim 7, wherein said pores are formed to be elongated in the wave-like wavelength direction . The battery device according to any one of claims 5 to 8 , wherein the holding portion is provided so as to support the thermally conductive member from below . 10. The battery device according to claim 9, wherein said holding portion is in contact with said heat radiating member . 11. The battery device according to claim 10, wherein said holding portion further contacts the lower surface (21) of said battery cell . a plurality of stacked battery cells (2);
a heat dissipation member (10; 110) that absorbs and dissipates heat from the battery cell;
Thermally conductive gel material having thermal conductivity is interposed between the battery cell and the heat dissipating member so that the heat of the battery cell can be transferred to the heat dissipating member. a member (9);
Facing portions (30, 40) facing the side surfaces (22) of the battery cell on both sides in the stacking direction of the battery cell, and one end side of the facing portion holding the thermally conductive member in the stacking direction a regulating member (3, 4; 104) having a holding portion (31, 41) for regulating movement of the thermally conductive member;
with
The regulating member includes a second regulating member (4; 104) having a second facing portion (40) facing the side surface of the battery cell on both sides in the stacking direction, and a second regulating member (4; 104) on both sides in the stacking direction. a first regulating member (3) having a first facing portion (30) facing the side surface of the battery cell with two facing portions therebetween;
The second regulating member is a portion extending from both sides of the thermally conductive member in the stacking direction so as to cover the lower surface (21) of the battery cell, and the width direction of the second regulating member and the stack a second retainer (41) having a plurality of pores or apertures spaced apart in at least one of the directions;
The first regulating member is a portion that contacts the thermally conductive member from both sides of the second holding portion in the stacking direction, and a plurality of the first regulating members are arranged at intervals in the width direction of the first regulating member. A battery device having a first holding part (31) with a slit or aperture . The battery device according to any one of claims 1 to 12, wherein the regulating member is a plate-like member made of metal . The heat-dissipating member is a heat exchanger that exchanges heat with a fluid,
14. The battery device according to any one of claims 1 to 13, further comprising a restraining member (7; 107) that restrains the plurality of battery cells and the restraining member by applying a compressive force in the stacking direction. . a plurality of stacked battery cells (2);
a heat dissipation member (10; 110) that absorbs and dissipates heat from the battery cell;
Thermally conductive gel material having thermal conductivity is interposed between the battery cell and the heat dissipating member so that the heat of the battery cell can be transferred to the heat dissipating member. a member (9);
Facing portions (30, 40) facing the side surfaces (22) of the battery cell on both sides in the stacking direction of the battery cell, and one end side of the facing portion holding the thermally conductive member in the stacking direction a regulating member (3, 4; 104) having a holding portion (31, 41) for regulating movement of the thermally conductive member;
with
The heat-dissipating member is a heat exchanger that exchanges heat with a fluid,
A battery device comprising a restraining member (7; 107) that restrains the plurality of battery cells and the restraining member by applying a compressive force in the stacking direction.

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