JP5181800B2 - Batteries, assembled batteries, vehicles, and battery-equipped devices - Google Patents

Description

  The present invention relates to a battery, a battery pack, a vehicle, and a battery-equipped device including a battery case mainly made of an insulating resin.

In recent years, with the spread of portable electronic devices such as mobile phones, notebook computers, and video camcorders and vehicles such as hybrid electric vehicles, the demand for batteries used for these driving power sources is increasing.
Among such batteries, there is a battery including a battery case mainly composed of an insulating resin. However, in general, the thermal conductivity of the insulating resin is lower than that of a metal such as aluminum or stainless steel. Therefore, for example, in a battery using a battery case mainly made of an insulating resin, heat generated by the power generation element is less likely to be dissipated outside the battery (battery case) than in a battery case using a metal battery case.
In order to cope with this, in Patent Document 1, a lead storage battery including a battery case (battery case) in which a metal part is coated with a resin and embedded in the metal part is flattened with a synthetic resin in Patent Document 2. The secondary battery provided with the heat radiating member (exhaust heat member) in the outer surface of the battery case (battery case) comprised by the hollow rectangular shape is disclosed.

Japanese Patent Laid-Open No. 10-144266 JP 2003-17141 A

  However, in the battery described in Patent Document 1, since the metal member is not exposed to the outside of the battery case, even if the metal member absorbs heat generated from the power generation element, it is difficult to dissipate the heat to the outside of the battery case. Moreover, in the battery described in Patent Document 2, although a heat radiating member is provided on the outer surface of the battery case, a synthetic resin constituting the battery case is interposed between the heat radiating member and the heat generating element that generates heat. The heat radiating member hardly absorbs heat.

  The present invention has been made in view of such a problem, and a battery that absorbs heat from a power generation element and can reliably release the heat to the outside of the battery, a vehicle equipped with such a battery, and a battery-equipped device. The purpose is to provide.

And the solution means a battery case having a resin containing wall portion made of an insulating resin surrounding a power generation element and a housing space for housing the power generating element, and surrounding at least a part of the housing space, A heat exhaust member made of a good heat conductive material having a higher thermal conductivity than the insulating resin, and a part of the heat exhaust member is at least a part of the resin containing wall portion. A heat absorption part that is embedded inside the resin heat exhaust wall part or is disposed closer to the housing space than the resin heat exhaust wall part, forms a heat exhaust wall part together with the resin heat exhaust wall part, and absorbs heat in the housing space. There, the other part of the waste heat member is disposed on the outside of the battery case, Ri radiating portion der for radiating heat conducted from the heat absorbing part to the outside of the battery case, the battery case, A case body member having an opening, and the opening A lid member for closing, the lid member including the heat exhaust member, having a lid wall portion that faces the opening and surrounds a part of the housing space, and the lid wall portion At least a part of the heat exhaust wall portion, and the lid member is located around the lid wall portion, and is connected to an opening peripheral portion of the case main body member that forms the peripheral edge of the opening. A peripheral connection portion, and the heat exhaust member includes an endothermic peripheral portion extending from the heat absorption portion in the lid wall portion and positioned in the peripheral connection portion, and the opening peripheral portion of the case body member And the peripheral edge connecting portion of the lid member are formed by fusion welding of the insulating resin forming the peripheral edge portion of the opening and the insulating resin forming the peripheral edge connecting portion. The batteries are fixed to each other via the part .

The battery of the present invention has a heat exhaust wall, is embedded in the resin heat exhaust wall, or is disposed closer to the housing space than the heat sink, and a heat dissipator disposed outside the battery case. An exhaust heat member having Thereby, in the exhaust heat wall part, the heat absorption part is closer to the accommodation space for accommodating the power generating element that generates heat than the outside of the battery case, so that more heat can be absorbed from the accommodation space.
Moreover, since the heat radiating part of the exhaust heat member is exposed to the outside of the battery case, the heat absorbed by the heat absorbing part can be reliably radiated to the outside of the battery case.
Moreover, in the battery of this invention, since the cover member which comprises a battery case contains a heat exhaust member, it can form more easily than the case where a heat exhaust member is provided in a case main body member, for example.
Furthermore, in the battery of the present invention, since the heat absorption peripheral portion of the heat exhaust member extends from the heat absorption portion in the cover wall portion to the inside of the peripheral connection portion in the cover member, the heat absorption portion extends to the vicinity of the peripheral connection portion. For this reason, a heat absorption part can absorb heat over the wide range of accommodation space. On the other hand, since the lid member and the case main body member are fixed to each other via the resin fusion welded portion, a battery case in which the case main body member and the lid member are firmly integrated can be configured.

Examples of the heat exhaust member include a good heat conductive material having a higher thermal conductivity than the insulating resin, for example, a metal plate made of metal (copper, aluminum, stainless steel, etc.), a bulk metal body such as a metal rod.
In addition, as the heat radiating part of the heat exhaust member, the part of the heat exhaust member that is exposed to the outside of the battery case so that heat can be exhausted is applicable. For example, the part of the heat exhaust member exposed to the outside of the battery case A part having one or a plurality of exposed surfaces and a member protruding outward from the battery case are included.
Furthermore, examples of the power generation element include a positive electrode plate supporting a positive electrode active material, a negative electrode plate supporting a negative electrode active material, a separator interposed therebetween, or a solid electrolyte body that also serves as a separator.

In addition, as a case main body member, the bottomed cylindrical thing which has one opening is mentioned, for example. In this case, the one opening may be closed with one lid member. Moreover, the cylindrical thing (frame shape) which has an opening at both ends, respectively is mentioned. In this case, the two openings are closed by the lid members so that the case main body member is sandwiched between the two lid members.
Moreover, as an opening, when accommodating a power generation element in a case main body member, the opening which lets a power generation element pass can be mentioned.

  Further, in the above-described battery, it is preferable that the lid wall portion of the lid member is the battery that is the exhaust heat wall portion.

  In the battery of the present invention, since the entire cover wall portion is the exhaust heat wall portion, it absorbs more heat through the heat absorption portion arranged in the entire cover wall portion, and through the heat dissipation portion of the exhaust heat member, The heat can be exhausted outside the battery case.

  Further, the battery according to any one of the above, wherein the electrolytic solution is stored in the housing space, and between the electrolytic solution and the heat absorbing portion on the housing space side of the heat absorbing portion of the heat exhaust member. A battery provided with an insulating film that isolates and insulates the battery is preferable.

  In the battery of the present invention, the heat absorption part of the heat exhaust member and the electrolyte solution are isolated and insulated by the insulating coating, so that the electrolyte solution touches the heat absorption part of the heat exhaust member, and the heat exhaust member corrodes, Moreover, it can prevent that an electrolyte solution and the member outside a battery case short-circuit through an exhaust heat member.

  In addition, as an insulating film, when the heat absorption part of an exhaust heat member is formed with an aluminum material, the alumite layer formed in the inner surface (accommodation space side) surface of this heat absorption part is mentioned, for example. In addition, an insulating resin layer such as an epoxy resin formed on the inner surface of the heat absorbing portion, an insulating ceramic layer, and an insulating glass layer can be used.

  Or, in any one of the batteries described above, the electrolytic solution is stored in the accommodation space, and the heat absorption part of the heat exhaust member is embedded in the resin heat exhaust wall part, Covering the heat exhaust wall portion space side surface facing the accommodation space in the resin heat exhaust wall portion, the electrolyte penetrates the resin heat exhaust wall portion from the heat exhaust wall portion space side surface to the heat exhaust member. A battery provided with an electrolyte penetration preventing material that prevents the battery from reaching the battery is preferable.

  In the battery of the present invention, since the electrolyte solution permeation preventive material that covers the side surface of the heat exhaust wall portion of the resin heat exhaust wall portion is provided, the electrolyte is discharged from the heat exhaust member (by a pinhole or the like generated in the resin heat exhaust wall portion). It is possible to prevent the exhaust heat member from coming into contact with the electrolyte and corroding or having a potential.

  Examples of the electrolyte permeation preventing material include a metal plate / metal foil, a metal plating layer, and a DLC layer that are insulated from the exhaust heat member.

  Furthermore, in any one of the above-described batteries, the heat-dissipating member is formed by bending a flat plate, the heat-absorbing portion having a flat plate shape, and a shape bent with respect to the heat-absorbing portion, and the thickness of the heat-absorbing portion. A battery having a rigidity improving portion that improves the rigidity in the direction is preferable.

  In the battery of the present invention, the heat exhaust member is a bent flat plate, and includes a rigidity improving portion in addition to the flat heat absorbing portion. For this reason, it is possible to prevent the endothermic part from being deformed by an external force or a stress applied to the endothermic part during resin molding, for example, while having a flat endothermic part. In addition, since the rigidity improving portion is formed by bending, it is possible to form an easily and inexpensive heat exhaust member, and thus an inexpensive battery.

  Furthermore, in any one of the above-described batteries, the housing space is configured by a plurality of surrounding surfaces, and the largest surrounding surface having the largest area among the plurality of surrounding surfaces among the resin containing wall portions. It is preferable that the maximum resin-accommodating wall portion constituting the battery is the battery that forms the exhaust heat wall portion.

  In the battery according to the present invention, the maximum resin-accommodating wall portion forms an exhaust heat wall portion, so that it is easy to ensure the necessary size of the exhaust heat exhaust wall portion.

  Furthermore, in any one of the above-described batteries, a space-facing resin housing wall portion facing the housing space, except for the resin heat exhausting wall portion, of the resin housing wall portion, faces the housing space. A first moisture permeation preventing material that is insulated from the exhaust heat member and prevents moisture from passing between the housing space and the outside of the battery case through the space-facing resin housing wall on the entire side surface of the space. The waste heat wall portion is insulated from the heat absorption portion on the housing space side of the resin waste heat wall portion, and the inside of the accommodation space and the outside of the battery case through the resin waste heat wall portion. A battery having a second moisture permeation preventive material that prevents moisture permeation between them, or the above-described heat absorbing portion made of a material that does not allow moisture to permeate in its thickness direction is preferable.

  The battery of the present invention includes a first moisture permeation preventing material on the entire space side surface of the space-facing resin wall portion excluding the resin exhaust heat wall portion of the resin containing wall portion. Moreover, the heat absorption part which consists of a 2nd moisture permeation prevention material or the material which does not permeate | transmit a water | moisture content is provided in the accommodation space side rather than the resin heat exhaust wall part of a heat exhaust wall part. Thereby, moisture permeation through the space-facing resin wall portion or resin exhaust heat wall portion can be prevented between the outside of the battery case and the accommodation space. Thus, problems due to moisture permeation can be prevented.

Specifically, for example, in a battery using an aqueous electrolyte, it is possible to reduce the release of moisture in the aqueous electrolyte to the outside of the battery case through the insulating resin on the space-facing resin wall. Thereby, the battery performance can be maintained by reducing the change in the concentration of the electrolytic solution.
Further, in a battery using a non-aqueous electrolyte solution, it is possible to prevent problems such as decomposition of the electrolyte solution by mixing moisture from the outside into the non-aqueous electrolyte solution.

  Furthermore, it is preferable that the battery is a battery provided with a non-aqueous electrolyte in the accommodation space.

  The battery of the present invention is provided with a non-aqueous electrolyte in the accommodation space. On the other hand, the first moisture permeation preventive material and the second water permeation preventive material described above or the resin containing wall portion provided with the heat absorbing portion is surrounded. For this reason, for example, in the case of a lithium ion secondary battery using a non-aqueous electrolyte, hydrofluoric acid generated by the reaction between the non-aqueous electrolyte and water can be prevented from corroding the electrode of the power generation element. A battery capable of appropriately discharging heat to the outside of the battery case can be obtained while preventing problems caused by mixing of moisture from the outside into the liquid.

  Furthermore, another solution is an assembled battery in which a plurality of any of the batteries described above are arranged.

  Since the assembled battery of the present invention uses the above-described battery, the assembled battery can absorb heat from the housing space of each battery and reliably discharge the heat.

Alternatively , a plurality of power generation elements and a plurality of storage spaces each storing one of the power generation elements are respectively surrounded, and the storage spaces are arranged in rows with each other. An assembled battery case having a resin housing wall made of an insulating resin surrounding at least a part of the housing space, the exhaust being made of a good heat conductive material having a higher thermal conductivity than the insulating resin. One or more heat members are provided, and a part of the exhaust heat member is at least a part of an intervening resin accommodating wall portion interposed between two adjacent accommodating spaces among the resin accommodating wall portions. It is embedded in the exhaust heat wall portion, or is disposed on at least one side of the two accommodation spaces adjacent to the interposition resin accommodation wall portion to which the interposition resin exhaust heat wall portion belongs than the interposition resin exhaust heat wall portion. Being this It is an endothermic heat wall part together with the resin heat exhaust wall part, is a heat absorbing part that absorbs heat in the housing space, and the other part of the exhaust heat member is disposed outside the assembled battery case, An assembled battery that is a heat radiating part that radiates heat conducted from the heat absorbing part to the outside of the assembled battery case may be mentioned .

The above-described assembled battery has an intermediate heat exhaust wall, is embedded in the intermediate resin heat exhaust wall, or is disposed on at least one side of the two housing spaces, and outside the battery case. An exhaust heat member having an arranged heat dissipating part is provided. Thereby, in the interstitial exhaust heat wall part, the heat absorption part absorbs heat generated from each of the power generating elements accommodated in the two adjacent accommodation spaces, and can be radiated to the outside of the assembled battery case by the heat radiation part. The power generation element can be cooled.

  Furthermore, in the above-described assembled battery, the heat absorption part of the heat exhaust member that stores the electrolyte solution in each of the housing spaces and forms the intermediary heat exhaust wall part includes the intermediary exhaust heat to which it belongs. It is preferable that the assembled battery is insulated from any of the electrolyte solutions stored in the two housing spaces adjacent to the wall.

In the assembled battery described above , the heat absorption part of the exhaust heat member is insulated from both of the electrolytes in the two storage spaces adjacent to the interposition storage wall to which the self heat member belongs. It is possible to prevent a short circuit through the heat absorption part. Moreover, it is possible to prevent a short circuit between the outside and the electrolytic solution through the exhaust heat member.

Furthermore, other solutions, one of the battery described above, or a vehicle equipped with the assembled battery before mentioned.

  Since the vehicle of the present invention uses the above-described battery or assembled battery, the vehicle can absorb the heat in the accommodation space of each battery and reliably release the heat.

  The vehicle may be a vehicle that uses electric energy from a battery for all or part of its power source. For example, an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric Wheelchairs, electric assist bicycles, and electric scooters.

Furthermore, other solutions, one of the battery described above, or a battery-equipped device that mounts the assembled battery before mentioned.

  Since the battery-equipped device of the present invention uses the above-described battery or assembled battery, the battery-equipped device can absorb the heat in the accommodation space of each battery and reliably radiate the heat.

  The battery-equipped device may be any device equipped with a battery and using it as at least one of the energy sources. For example, a battery such as a personal computer, a mobile phone, a battery-driven electric tool, an uninterruptible power supply, etc. Various household appliances, office equipment, and industrial equipment driven by

(Embodiment 1)
Next, Embodiment 1 of the present invention will be described with reference to the drawings.
First, the battery 1 according to the first embodiment will be described. 1 is a perspective view of the battery 1, FIG. 2 is a cross-sectional view taken along the line AA, and FIG. 3 is a cross-sectional view taken along the line BB.
The battery 1 according to the first embodiment includes a rectangular box-shaped battery case 10 that surrounds the accommodation space CS, a heat exhaust member 40, a positive electrode terminal member 70, a negative electrode terminal member 80, a power generation element 50, and a non-aqueous electrolyte ES. This is a wound lithium ion secondary battery.

  Among these, as shown in FIGS. 2 and 3, the power generation element 50 is formed by winding a belt-like positive electrode plate 51 and a negative electrode plate 52 into a flat shape via a belt-like separator 53 made of polyethylene. The power generation element 50 is housed in the housing space CS of the battery case 10. The positive electrode plate 51 is electrically connected to the positive electrode terminal member 70 and the negative electrode plate 52 is electrically connected to the negative electrode terminal member 80 by welding.

The non-aqueous electrolyte ES is a non-aqueous organic electrolyte obtained by adding a solute (LiPF ₆ ) to a mixed organic solvent of ethylene carbonate (EC) and ethyl methyl carbonate (EMC). This nonaqueous electrolytic solution ES penetrates and is held on the surface and inside of the power generation element 50 (separator 53) described above (see FIG. 3).

The battery case 10 has a substantially rectangular box shape. In the battery case 10, the above-described positive electrode terminal member 70 and negative electrode terminal member 80 are respectively disposed on the first surface 10 </ b> A located above in FIG. 1 so as to protrude in the third direction DC. Furthermore, a rectangular plate-shaped safety valve 90 is also mounted on the first surface 10A.
In addition, in the battery case 10, the second surface 10 </ b> B located on the left side in FIG. 1 and the third surface 10 </ b> C located on the right side in FIG. 1 have plate-like legs 15. . The leg portions 15 protrude outward from the second surface 10B and the third surface 10C along the first direction DA, respectively. In addition, this leg part 15 can fix this battery 1 using a volt | bolt etc., for example, when mounting this battery 1 in an assembled battery case.

  In addition, the battery case 10 is a plate formed by integrating a bottomed rectangular box-shaped battery case body 20 made of an insulating resin, a heat exhaust member 40, and the same insulating resin as the battery case body 20 by resin molding. Shaped sealing lid 30. The battery case 10 is formed by fusion-bonding the battery case body 20 and the sealing lid 30 to each other in the second direction DB via the resin fusion bonding portion 10X (see FIG. 1).

  In addition, the housing space CS located inside the battery case 10 is a lid center wall portion described below among the body side inner wall surface 21T of the body wall portion 21 described below in the battery case body 20 and the sealing lid 30. It is surrounded by 32 lid side inner wall surfaces 32T.

  Next, the battery case body 20 will be described with reference to FIG. The battery case main body 20 has a bottomed rectangular box-shaped main body wall 21. The main body wall portion 21 forms an opening 20B, and the opening 20B opens toward one side (left side in FIG. 4) in the second direction DB.

  Of these, the main body wall portion 21 includes a main body resin wall portion 22 made of an insulating resin and a first permeation preventive film AF made of diamond-like carbon (DLC). In the main body wall portion 21, the first permeation preventive film AF is densely covered on the entire main body space side surface 22F facing the accommodation space CS side of the bottomed rectangular box-shaped main body resin wall portion 22 (FIGS. 2 and 3). reference). That is, the main body side inner wall surface 21T of the main body wall portion 21 is formed of the first permeation prevention film AF.

  For this reason, moisture permeation through the main body resin wall portion 22 can be prevented between the outside of the battery case main body 20 and the accommodation space CS. Thus, it is possible to prevent problems due to moisture permeation, that is, decomposition of the non-aqueous electrolyte ES due to moisture mixing into the non-aqueous electrolyte ES.

Next, the sealing lid 30 will be described with reference to FIGS. 5 and 6. 6 is a cross-sectional view taken along the line CC of FIG.
As will be described later, the sealing lid 30 is formed by integrating an insulating resin with an exhaust heat member 40 made of an aluminum plate shown in FIG. 7 by injection molding. The sealing lid 30 includes a rectangular plate-shaped lid portion 31 and a heat radiating portion of the heat exhausting member 40 that protrudes from the lid portion 31 to both sides in the first direction DA and is exposed to the outside of the battery case 10. 44 (see FIGS. 1 and 5).
Among these, the lid portion 31 is located at the center thereof, and is located around the lid central wall portion 32 that closes the opening 20 </ b> B when the battery case main body 20 is fused, and the lid central wall portion 32. And a lid peripheral edge portion 33 that contacts and connects to the opening peripheral edge portion 20E of the battery case body 20. Note that the portion surrounded by the two-dot chain line in FIG. 5 and the portion sandwiched by the two two-dot chain lines in FIG. 6 face the opening 20B of the battery case body 20, and close the lid central wall. Part 32.

  The exhaust heat member 40 is formed by bending an aluminum flat plate in a crank shape on both sides in the first direction DA. Among these, the part located in the center and having a larger surface area than the others is the heat absorbing part 41 described above, and the flat parts located at both ends of the first direction DA and projecting from the insulating resin are the heat radiating part 44 and Become. Further, a portion located between the heat absorbing portion 41 and the heat radiating portion 44 and bent in a crank shape is defined as an intermediate portion 43 (see FIG. 7). Further, a part located around the heat absorbing part 41 is referred to as an endothermic peripheral part 49. A part of the endothermic peripheral portion 49 is included in the intermediate portion 43.

Accordingly, the lid central wall portion 32 is located closer to the accommodation space CS side in the second direction DB than the central resin wall portion 32P made of insulating resin and the heat exhausting member 40, and the opening of the battery case body 20 is opened. It consists of the heat absorption part 41 which faces 20B (refer FIG.5, 6).
Also, the lid peripheral portion 33 is located around the central resin wall portion 32P, the peripheral resin portion 33P also made of an insulating resin, and the heat absorbing surroundings located around the heat absorbing portion 41 of the exhaust heat member 40. It consists of the part 49 and the intermediate part 43 bent in the shape of a crank. In the lid peripheral edge portion 33, the endothermic peripheral portion 49 is exposed to the accommodation space CS side from the peripheral resin portion 33 </ b> P, similarly to the endothermic portion 41. For this reason, when integrating with the battery case main body 20, the opening peripheral portion 20E of the battery case main body 20 and the heat absorbing peripheral portion 49 and a part of the peripheral resin portion 33P are in contact with each other and connected.

  In this way, the intermediate portion 43 is connected to the heat absorbing portion 41 and the heat radiating portion 44 to transfer heat from the heat absorbing portion 41 to the heat radiating portion 44, and is bent at a right angle twice with respect to the heat absorbing portion 41 and the heat radiating portion 44. Since it has a crank shape, the rigidity of the heat absorbing portion 41 and the heat radiating portion 44 is improved. That is, by providing the intermediate portion 43, it is possible to prevent the heat absorbing portion 41 from being deformed by an external force or a stress applied to the heat absorbing portion 41 during resin molding. Moreover, since the heat exhausting member 40 is formed by bending one plate, the heat exhausting member 40 that is easy to form and inexpensive, and thus the inexpensive battery 1 can be obtained.

In the first embodiment, the endothermic surface 41A of the endothermic part 41 facing the accommodation space CS and the peripheral surface 49A of the endothermic peripheral part 49 of the endothermic peripheral part 49 facing the accommodation space CS are the central resin. It is exposed from the wall 32P (see FIG. 6).
An insulating film ZF made of an insulating resin is attached to the endothermic surface 41A and the peripheral surface 49A as a whole (see FIG. 6). For this reason, in a state where the sealing lid 30 (lid portion 31) is fusion-welded to the battery case body 20 to form the battery case 10 (battery 1), the heat absorbing portion 41 is a non-aqueous electrolyte in the accommodation space CS. It is possible to prevent corrosion by touching the ES. In addition, it is possible to prevent a short circuit between the nonaqueous electrolytic solution ES and a member outside the battery case 10 through the heat absorbing portion 41.

  The battery case 10 of the first embodiment includes a main body resin wall portion 22 of the battery case main body 20 and a central resin wall portion 32P of the sealing lid 30 that surround the housing space CS. Further, in the central resin wall portion 32 </ b> P, the heat absorbing portion 41 is located closer to the accommodation space CS that accommodates the power generating element 50 that generates heat than the outside of the battery case 10. Specifically, as shown in FIGS. 2 and 3, the heat absorbing portion 41 is located in the housing space CS rather than the outside of the battery case 10 when viewed in the thickness direction (second direction DB) of the central resin wall portion 32 </ b> P. close. For this reason, more heat can be absorbed from the accommodation space CS.

  Further, since the heat radiating portion 44 of the exhaust heat member 40 is exposed to the outside of the battery case 10, that is, from both sides of the first direction DA from the sealing lid 30, it is absorbed by the heat absorbing portion 41 through the heat radiating portion 44. Heat can be reliably radiated to the outside of the battery case 10 via the intermediate portion 43.

Further, in the battery 1, the sealing lid 30 that forms the battery case 10 includes the heat absorbing portion 41 of the heat exhausting member 40, so that, for example, easier than when the heat exhausting member is provided in the bottomed rectangular box-shaped battery case body 20. Can be formed.

  In addition, the entire lid central wall 32 of the sealing lid 30 covers the entire opening 20B. For this reason, more heat can be absorbed through the heat absorbing portion 41 disposed on the entire lid central wall portion 32, and the heat can be discharged outside the battery case 10 through the heat radiating portion 44.

Moreover, in this Embodiment 1, the battery case main body 20 has the cyclic | annular opening peripheral part 20E along the inner periphery of this opening 20B (refer FIG. 4). As described above, in the battery case body 20, the entire body space side surface 22F of the body resin wall portion 22 is covered with the first permeation preventive film AF made of DLC (see FIGS. 2 and 3).
On the other hand, the lid peripheral edge portion 33 of the sealing lid 30 is a portion facing the above-described opening peripheral edge portion 20E when being fused to the battery case body 20.

As described above, in the sealing lid 30 of the first embodiment, the endothermic peripheral portion 49 of the heat exhausting member 40 extends from the endothermic portion 41 in the lid central wall portion 32 to the inside of the lid peripheral portion 33 (see FIG. 6). For this reason, the heat absorption part 41 spreads to the vicinity of the lid peripheral edge part 33. Thereby, the heat absorption part 41 can absorb heat over a wide range of the accommodation space CS.
On the other hand, the peripheral resin portion 33P is fused to the insulating resin forming the main body resin wall portion 22 at the opening peripheral portion 20E and fixed to each other via the resin fusion weld portion 10X over the entire circumference of the lid peripheral portion 33. (See FIGS. 2 and 3). Thus, the battery case body 20 and the sealing lid 30 are welded together to form the battery case 10 that is firmly integrated.

Furthermore, not only the heat absorption part surface 41A of the heat absorption part 41 made of aluminum but also the peripheral part surface 49A of the heat absorption peripheral part 49 are covered with the insulating film ZF (see FIGS. 2, 3 and 6). Therefore, when the battery case body 20 and the sealing lid 30 are pressed against each other and fused together to produce the battery case 10, the opening peripheral edge portion 20 </ b> E of the battery case body 20 is insulated from the heat absorbing portion surface 49 </ b> A on the heat absorbing peripheral portion 49. Abuts on film ZF. Therefore, in this battery case 10, the nonaqueous electrolyte ES in the accommodation space CS reaches the heat absorption part 41 through the gap between the opening peripheral edge part 20E and the insulating film ZF, corrodes it, or It is possible to prevent the outside and the nonaqueous electrolyte solution ES from being short-circuited through the heat removal member 40.
Further, the sealing lid 30 has a heat absorbing portion 41 and a heat absorbing peripheral portion 49 of the heat exhausting member 40, and these close the opening 20 </ b> B of the battery case body 20, so that moisture is stored through the lid resin wall portion 32. It is also possible to prevent entry into the space CS.

Note that the lid-side inner wall surface 32T of the lid center wall portion 32 faces the lid-side inner wall surface 32T among a plurality of planes surrounding the housing space CS of the battery case 10 as can be seen from FIGS. Together with the main body-side facing inner wall surface 21TM, it has the largest area and faces the accommodation space CS (see FIGS. 2 and 3). That is, the central resin wall portion 32P constituting the lid-side inner wall surface 32T is the maximum resin housing wall portion MU.
Thus, in the battery case 10 (battery 1) of the first embodiment, a large area can be secured as the heat absorbing portion 41 of the heat exhausting member 40.

  Furthermore, the battery 1 according to the first embodiment includes the nonaqueous electrolytic solution ES in the accommodation space CS, and the accommodation space CS includes the heat absorption of the main body wall 21 including the first permeation prevention material AF and the sealing lid 30. Surrounded by the portion 41, entry of moisture from the outside of the battery case 10 is prevented. Accordingly, moisture can be mixed into the non-aqueous electrolyte ES, such as preventing the hydrofluoric acid generated by the reaction between the non-aqueous electrolyte ES and water from corroding the positive electrode plate 51 and the negative electrode plate 52 of the power generation element 50. Thus, the battery 1 capable of appropriately dissipating heat to the outside of the battery case 10 can be obtained while preventing problems caused by the operation.

Next, a method for manufacturing the battery 1 according to the first embodiment will be described with reference to the drawings.
First, the main body resin wall portion 22 of the main body wall portion 21 is formed by injection molding, and then a first permeation prevention film AF made of DLC is formed on the main body side space side surface 22F of the main body resin wall portion 22 by sputtering. Thus, the battery case body 20 described above is formed (see FIG. 4).
On the other hand, the above-described exhaust heat member 40 having an aluminum plate bent is prepared as shown in FIG. Next, the insulating resin is injection-molded to form the central resin wall portion 32P and the peripheral resin portion 33P and to be integrated with the heat exhausting member 40. At that time, the heat absorbing portion surface 41A and the peripheral portion surface 49A are both on one side in the second direction DB from the central resin wall portion 32P, and the heat radiating portions 44, 44 are on both sides in the first direction DA from the peripheral resin portion 33P. Are formed so as to be exposed (see FIG. 8).
Next, the insulating film ZF is affixed to the heat absorption part surface 41A and the peripheral part surface 49A exposed from the central resin wall part 32P and the peripheral resin part 33P. Thereby, the above-described sealing lid 30 is formed (see FIG. 5).

  Next, the process of fusing the sealing lid 30 to the battery case body 20 will be described with reference to FIG. In addition, in the accommodation space CS of the battery case body 20, the power generation element 50 in which the positive electrode terminal member 70 and the negative electrode terminal member 80 are connected is accommodated in advance. Specifically, the power generation element 50 is obtained by winding a long strip-shaped positive electrode plate 51 and a negative electrode plate 52 together in a flat circle shape with a strip-shaped separator 53 interposed therebetween. Further, to the power generation element 50, a positive electrode terminal member 70 is connected to a positive electrode plate 51 extending from the power generation element 50, and a negative electrode terminal member 80 is connected to the negative electrode plate 52 by welding.

  The main body resin wall portion 22 in the opening peripheral portion 20E of the battery case main body 20 that houses the power generation element 50 and the peripheral resin portion 33P in the lid peripheral portion 33 of the sealing lid 30 are each softened by a hot plate (not shown). Then, the opening peripheral edge portion 20E and the lid peripheral edge portion 33 are opposed to each other (see FIG. 8), the softened main body wall portion 21 and the peripheral resin portion 33P are pressed against each other, and the battery case main body 20 and the sealing lid 30 are fused. Let Thus, the battery case 10 in which the battery case main body 20 and the sealing lid 30 are fixed to each other through the resin fusion welding portion 10X is obtained.

  Thereafter, the non-aqueous electrolyte ES is injected into the battery case 10 from the through hole 10P provided on the first surface 10A of the battery case 10, and the through hole 10P is sealed with the safety valve 90, whereby the battery 1 is completed. To do.

(Modification 1)
Next, the battery 101 according to the first modification of the present invention will be described with reference to FIGS. 1, 10, and 11.
The battery 101 according to the first modification differs from the first embodiment in that the heat absorbing portion 141 of the heat exhausting member 140 is disposed inside the central resin wall portion 132P of the sealing lid 130, and is otherwise the same. .
Therefore, differences from the first embodiment will be mainly described, and description of similar parts will be omitted or simplified. In addition, about the same part, the same effect is produced. In addition, the same contents are described with the same numbers.

The battery case 110 of the battery 101 according to the first modified embodiment has the same insulation as the battery case main body 20 on the heat exhaust member 140 in addition to the bottomed rectangular box-shaped battery case main body 20 made of an insulating resin, as in the first embodiment. 1 has a plate-like sealing lid 130 formed by integrating resin with resin molding (see FIG. 1).
The battery case 110 surrounds the accommodation space CS as in the first embodiment (see FIGS. 10 and 11). Specifically, the accommodation space CS is a lid facing the accommodation space CS among the main body side inner wall surface 21T of the main body wall portion 21 facing the accommodation space CS and the sealing lid 130 of the battery case body 20. It is surrounded by a lid-side inner wall surface 132T of the central wall portion 132.

  Among them, the sealing lid 130 is formed by integrating an injection-molded insulating resin with a heat exhausting member 140 made of a bent aluminum plate, as in the first embodiment. However, the configurations of the exhaust heat member 140 and the insulating resin are different from those of the first embodiment.

  That is, the heat exhausting member 140 has two intermediate portions 143 that respectively connect the heat absorbing portion 141 and the two heat radiating portions 144 as in the first embodiment. However, the dimension in the second direction DB of the intermediate portion 143 is shorter than that in the first embodiment. For this reason, the heat radiating portion 144 protrudes from the lid portion 131 to both sides in the first direction DA and is exposed to the outside of the battery case 110, as in the first embodiment. However, the heat absorption part 141 is not exposed from the central resin wall part 132P of the sealing lid 130, but is embedded therein. That is, among the sealing lid 130 (lid portion 131), in the lid central wall portion 132 facing the accommodation space CS, the heat absorbing portion 141 is a lid resin located inside the central resin wall portion 132P made of an insulating resin. It arrange | positions between the inner wall part 132M and the lid | cover resin outer side wall part 132N located in the outer side (refer FIG. 10, 11).

  Even in the battery 101 of the first modified embodiment, although not equivalent to the first embodiment, in this way, in the central resin wall portion 132P, the heat absorbing portion 141 accommodates the power generating element 50 that generates heat more than the outside of the battery case 110. It can be placed near the CS (see FIGS. 10 and 11). For this reason, more heat can be absorbed from the accommodation space CS.

  Further, among the above-mentioned lid resin inner side wall portion 132M (central resin wall portion 132P), the lid space side surface 132F facing the accommodation space CS is made of DLC, and can be prevented from transmitting electrolyte solution and moisture. It is densely covered with the prevention material BF. That is, the lid-side inner wall surface 132T of the lid center wall portion 132 is formed of the second permeation prevention material BF.

  For this reason, even if a pinhole or the like occurs in the central resin wall portion 132P (lid resin inner wall portion 132M), the non-aqueous electrolyte ES reaches the heat absorbing portion 141 due to the formation of the second permeation preventive material BF. It is possible to prevent the exhaust heat member 140 (heat dissipating part 144) from having a potential.

  Furthermore, moisture permeation through the central resin wall portion 132P (the lid resin inner wall portion 132M and the lid resin outer wall portion 132N) can be prevented between the outside of the sealing lid 130 and the accommodation space CS. Thus, it is possible to prevent problems due to moisture permeation, such as decomposition of the non-aqueous electrolyte ES due to water mixing into the non-aqueous electrolyte ES.

  Moreover, in this modification 1, the heat absorption part 141 of the heat exhausting member 140 is arrange | positioned inside the center resin wall part 132P. For this reason, compared with Embodiment 1, the sealing lid 130 and the battery case main body 20 are fusion-welded by the resin fusion-bonding part 110X over a wide area. Therefore, the storage space CS can be reliably sealed, and leakage of the nonaqueous electrolyte ES from the storage space CS to the outside of the battery case 110 can be reliably prevented.

(Reference-shaped state)
Next, the assembled battery 200 according to the reference shape state will be described with reference to FIG. 12-17. In addition, although description of the part similar to the above-mentioned Embodiment 1 is abbreviate | omitted or simplified, the same effect is produced about the same part. In addition, the same contents are described with the same numbers.

Battery pack 200 according to this reference shape condition includes a rectangular box-shaped battery pack case 210, the power generating element 50 of a plurality of wound-type, and a plurality of heat exhaust member 240 (see FIGS. 12 and 13).

Among these, the assembled battery case 210 has a plurality of housing spaces CS and CS for housing the above-described power generation element 50, as shown in FIG. 13 which is a DD cross-sectional view of FIG. The assembled battery case 210 surrounds the plurality of storage spaces CS and CS, and the storage spaces CS and CS are arranged in a row, that is, divided into a plurality of partitions in the second direction DB. The assembled battery case 210 is made of an insulating resin, and surrounds the housing spaces CS, CS. A frame resin wall portion 222 of a battery case frame body 220, which will be described later, and an intervening central resin wall portion of an intervening sealing plate 230. 232P.
Further, in the battery case 210, on the first surface 210A located at the upper side in FIG. 12, the positive electrode terminal member 70 and the negative electrode terminal member 80 protruding in the third direction DC are arranged in two rows along the second direction DB. Is arranged. Incidentally, the battery pack 200 according to this reference shape state, since used to connect each power generating element 50 in series, the positive terminal member 70 and the negative electrode terminal member 80 are arranged alternately in the second direction DB.

In addition, safety valves 90 are respectively mounted on the upper surface 210A of the assembled battery case 210 between the positive electrode terminal member 70 and the negative electrode terminal member 80 corresponding to the same accommodation space CS.
In the assembled battery case 210, a plurality of plate-like leg portions 15 are formed on the second surface 210B located on the left and the third surface 210C located on the right in FIG.

The assembled battery case 210 includes a rectangular frame-shaped battery case frame 220 and a plate-shaped intervening sealing plate 230 (see FIG. 12). In the assembled battery case 210, the battery case frames 220 and the intervening sealing plates 230 are alternately arranged in the second direction DB.
Further, in the assembled battery case 210, the bottomed rectangular box-shaped battery case body 20 used in Embodiment 1 is used at both ends of the second direction DB in place of the battery case frame body 220 described above. For this reason, the assembled battery case 210 is formed by fusing the battery case frame body 220 (or the battery case body 20) and the intervening sealing plate 230 to each other in the second direction DB via the resin fusion bonding portion 210X.

  Next, the battery case frame 220 in the assembled battery case 210 will be described with reference to FIG. The battery case frame 220 includes a frame wall portion 221 formed in a rectangular frame shape. Openings 220B and 220B are opened on both sides of the frame wall portion 221 in the second direction DB.

  The frame body wall portion 221 includes a frame body resin wall portion 222 formed by injection molding an insulating resin, and a first permeation prevention film AF made of diamond-like carbon (DLC). The first permeation prevention film AF densely covers the entire frame space side surface 222F, which is the inner surface of the frame resin wall portion 222 (see FIG. 13).

  Further, the intervening sealing plate 230 integrates an insulating resin that is injection-molded into the heat exhausting member 240 shown in FIG. The intervening sealing plate 230 formed thereby is a rectangular plate-shaped interposition wall portion 231 and a heat exhaust member 240 that protrudes from the interposition wall portion 231 to both sides in the first direction DA and is exposed to the outside of the assembled battery case 210. The heat radiation part 244 is included.

The exhaust heat member 240 is a hollow hollow opening on both sides in the third direction DC, and is elongated toward the first direction DA, and extends from the side surface of the rectangular tube toward both outer sides in the first direction DA. It is set as the form which has two flat plates to do. This heat exhaust member 240 is divided into a heat absorption part 241, a heat radiation part 244 and an intermediate part 243 as in the first embodiment. Among these, the heat absorption part 241 is included in two wall parts which have a large surface (heat absorption part surface 241A) in the second direction DB among the rectangular tubes of the heat removal member 240. On the other hand, the heat radiating portion 244 is a portion protruding from an insulating resin that forms an intervening central resin wall portion 232P and an intervening peripheral resin portion 233P, which will be described later, among flat plate portions respectively extending on both sides in the first direction DA. . The intermediate portion 243 is located between the two wall portions of the heat absorbing portion 241 and the heat radiating portion 244, and has a form in which two portions bent in a crank shape are combined. Further, a portion located around the heat absorbing portion 241 is referred to as an endothermic peripheral portion 249. A part of the endothermic peripheral portion 249 is included in the intermediate portion 243.
Thus, since the intermediate part 243 is bent at right angles to the heat absorbing part 241 and the heat radiating part 244, the rigidity of the heat absorbing part 241 and the heat radiating part 244 is improved. That is, it is possible to prevent the heat absorbing portion 241 from being deformed by the stress applied to the heat absorbing portion 241 during external force or resin molding.

  Of the intervening sealing plate 230, the interposition wall 231 is located at the center of the interposition seal plate 230, and the intervening central wall 232 that closes the opening 220 </ b> B when fused to the battery case frame 220 described above, and the interposition central wall 232. It includes an intervening peripheral edge portion 233 that is located at the peripheral edge and contacts the opening peripheral edge portion 220E of the battery case frame 220. In FIG. 15, a portion surrounded by a two-dot chain line is an intermediate wall portion 232 that faces the opening 220 </ b> B of the battery case frame 220.

The intervening central wall 232 is located in the center of the second direction DB, is located on both sides of the intervening central resin wall 232P made of insulating resin, and the second direction DB, and the opening 220B of the battery case frame 220. The heat-absorbing part 241 of the heat exhausting member 240 facing the surface (see FIG. 15). The intervening central resin wall 232P is the largest resin storage wall MU that has the largest area and faces the storage space CS (see FIG. 13).
Further, the interposed peripheral edge portion 233 includes the interposed peripheral resin portion 233P, which is also made of insulating resin, located around the interposed central resin wall portion 232P, and the heat absorbing peripheral portion 249 described above of the heat exhaust member 240, and the crank shape. And an intermediate portion 243 that is bent. In addition, in the intermediate | middle peripheral part 233, the heat absorption peripheral part 243 around the heat absorption part 241 is exposed to the accommodation space CS side from the intermediate | middle peripheral resin part 233P like the heat absorption part 241 among the intermediate parts 243. For this reason, when integrating with the battery case frame body 220, the opening peripheral edge portion 20E of the battery case frame body 220 is in contact with a part of the heat absorbing peripheral edge portion 243 and the interposed peripheral resin portion 233P.

  In addition, the interposition wall part 231 constitutes the assembled battery case 210 by fusing both of them toward the opening 220B of the battery case frame 220 described above. Therefore, in this assembled battery case 210, the heat absorption part 241 is disposed closer to the accommodation space CS than the intermediate central resin wall part 232P when viewed in the thickness direction (second direction DB) of the intermediate sealing plate 230 ( (See FIGS. 13 and 15).

  Moreover, the insulating film ZF which consists of insulating resin is affixed on the surrounding surface 249A which faces the accommodation space CS side among the heat absorbing portion surface 241A and the heat absorbing surrounding portion 249 of the heat absorbing portion 241. For this reason, in a state in which the assembled battery case 210 (assembled battery 200) is formed by fusion-bonding the interposed sealing plate 230 (intervening wall part 231) to the battery case frame 220, the heat absorbing part 241 is contained in the accommodation space CS. It is possible to prevent corrosion due to contact with the non-aqueous electrolyte ES. In addition, it is possible to prevent a short circuit between the non-aqueous electrolyte ES and a member outside the assembled battery case 210 through the heat absorbing portion 241.

In addition, as shown in FIGS. 13 and 15, the above-described intervening central wall portion 232 includes a heat absorbing portion 241 and an intervening central resin wall portion 232 </ b> P of the heat exhausting member 240 extending in the first direction DA and the third direction DC. It is formed between two housing spaces CS and CS.
For this reason, in the intervening central wall 232, the heat absorption part 241 absorbs heat generated from the respective power generation elements 50 and 50 accommodated in the two adjacent accommodation spaces CS and CS, and the heat dissipation part 244 absorbs the assembled battery case 210. Since the heat can be radiated to the outside, each power generating element 50, 50 can be efficiently cooled.

Next, the method of manufacturing the battery pack 200 according to this reference shape state, will be described with reference to FIGS. 15 to 17.
First, a frame resin wall portion 222 of the frame wall portion 221 is formed by injection molding, then the frame side space side surface 222F of the frame body resin wall portion 222, sputtering a first permeable barrier layer AF made of DLC The battery case frame 220 is formed by the method (see FIG. 14). On the other hand, the above-described exhaust heat member 240 shown in FIG. Insulating resin is injection-molded thereon to form an intervening central resin wall portion 232P and intervening peripheral resin portion 233P, and are integrated with the exhaust heat member 240. At that time, from the interposed central resin wall portion 232P and the interposed peripheral resin portion 233P, the heat absorbing portion surface 241A and the peripheral portion surface 249A are provided on both sides of the second direction DB, and the heat radiating portions 244, 24 are provided on both sides of the first direction DA. 244 is formed so as to be exposed (see FIG. 16B).
Next, the insulating film ZF is affixed to the entire heat absorbing portion surface 241A and the peripheral surface 249A exposed from the interposed central resin wall portion 232P and the interposed peripheral resin portion 233P. Thereby, the above-mentioned interposition sealing board 230 is made (refer FIG. 15).

Next, the process of fusing the intervening sealing plate 230 to the battery case frame 220 will be described with reference to FIG. The battery case frame 220 contains in advance a power generation element 50 in which the positive terminal member 70 and the negative terminal member 80 are connected.
The frame resin wall portion 222 in the opening peripheral portion 220E of the battery case frame 220 and the interposed peripheral resin portion 233P in the interposed peripheral portion 233 of the interposed sealing plate 230 are each softened by a hot plate (not shown). And the opening peripheral part 220E and the interposition peripheral part 233 are made to oppose (refer FIG. 17), and the battery case frame 220 and the interposition sealing board 230 are melt-welded. Thus, the assembled battery case 210 is obtained in which the battery case frame body 220 and the intervening sealing plate 230 are fixed to each other via the resin fusion welded portion 210X.

  Thereafter, the non-aqueous electrolyte ES is injected into the assembled battery case 210 from the through hole 210P on the first surface 210A of the assembled battery case 210, and the assembled battery is mounted and sealed in the through hole 210P with the safety valve 90. 200 is completed (see FIG. 12).

(Embodiment 3)
Next, an assembled battery 300 according to Embodiment 3 of the present invention will be described with reference to FIG.
As shown in FIG. 18, the assembled battery 300 is provided with a plurality of the above-described batteries 1 (101). The assembled battery 300 includes a battery unit 301 in which a plurality of batteries 1 (101) connected in series are accommodated in an assembled battery case 310, and a battery monitoring device 302 disposed on the first surface 310 </ b> A of the assembled battery case 310. And have. Among these, the battery monitoring device 302 includes an acquisition circuit (not shown) that acquires data related to the state (battery temperature, voltage) of the battery 1 (101) of the battery unit 301 using a sensor such as a thermistor (not shown).

  Since the assembled battery 300 according to the third embodiment uses the battery 1 (101) described above, the assembled battery can absorb the heat in the accommodation space CS in each battery 1 (101) and reliably radiate the heat. 300.

(Embodiment 4)
A vehicle 500 according to the fourth embodiment includes the above-described assembled battery 200 (300). Specifically, as shown in FIG. 19, vehicle 500 is a hybrid vehicle that is driven by using engine 540, front motor 520, and rear motor 530 in combination. The vehicle 500 includes a vehicle body 590, an engine 540, a front motor 520, a rear motor 530, a cable 550, an inverter 560, and an assembled battery 200 (300) attached thereto.

  Since the vehicle 500 according to the fourth embodiment uses the battery 1 (101) or the assembled battery 200 (300) described above, the heat in the accommodation space CS in each battery 1 (101) (and inside the assembled battery 200). The vehicle 500 can absorb the heat and reliably radiate the heat.

(Embodiment 5)
Further, the hammer drill 600 of the fifth embodiment is mounted with the battery pack 610 including the battery 1 (101) or the assembled battery 200 (300) described above, and as shown in FIG. 620 is a battery-equipped device. The battery pack 610 is detachably accommodated in the bottom 621 of the main body 620 of the hammer drill 600.

  Since the hammer drill 600 according to the fifth embodiment uses the battery 1 (101) or the assembled battery 200 (300) described above, the heat in the accommodation space CS in each battery 1 (101 or the assembled battery 200) is measured. A battery-mounted device that absorbs heat and can reliably dissipate the heat can be obtained.

In the above, the present invention has been described with reference to the first and third to fifth embodiments and the first modified embodiment. However, the present invention is not limited to the above-described embodiments, and may be appropriately changed without departing from the gist thereof. Needless to say, this is applicable.
For example, in Embodiment 1 and Modification 1, the battery is a lithium ion secondary battery. However, the present invention is applied to a secondary battery such as a nickel hydride secondary battery, or a primary battery such as an alkaline battery or a manganese battery. You may do it. Further, although a battery using a wound-type power generation element has been shown, a battery using a stack-type power generation element in which a plurality of positive plates and a plurality of negative plates are alternately stacked via separators may be used. .
Moreover, in Embodiment 1 and Modification 1, the battery case has a rectangular box shape. However, the battery case may have a shape having an accommodation space for accommodating the power generation element, for example, a cylindrical shape or a laminate pack shape.

Moreover, in Embodiment 1 and Modification 1, although the material of the heat removal member is aluminum, it is made of a good heat conductive material having a higher thermal conductivity than the insulating resin, for example, a metal other than aluminum (such as copper or stainless steel). A bulk metal body such as a metal plate or a metal rod may be used.
In the first embodiment and the like, two plate-like heat radiating portions are provided for each exhaust heat member. However, for example, one or three or more heat radiating portions may be provided in each exhaust heat member. Furthermore, although the heat-dissipating member is provided with the heat-dissipating part that protrudes from the cover wall part and is exposed entirely, for example, a part of the heat-dissipating member may be exposed.

In the first embodiment 及 beauty variant 1, an insulating film ZF made of an insulating resin and attached to the heat absorbing surface. However, instead of the insulating film, for example, when the heat absorption part of the heat exhaust member is formed of an aluminum material, an alumite layer may be formed on the surface of the heat absorption part. In addition, for example, an insulating resin layer such as an epoxy resin, an insulating ceramic layer, or an insulating glass layer may be provided on the surface of the heat absorbing portion. Furthermore, a second permeation preventive film BF made of DLC was provided on the inner surface of the lid as an electrolyte solution permeation preventive material. However, instead of DLC, for example, a metal plate BS (see FIG. 21), a metal foil, or a metal plating layer that is insulated from the exhaust heat member may be provided on the inner surface of the lid.

1 is a perspective view of a battery according to Embodiment 1 and Modification 1. FIG. It is sectional drawing (AA part of FIG. 1) of the battery concerning Embodiment 1. FIG. It is sectional drawing (BB part of FIG. 1) of the battery concerning Embodiment 1. FIG. It is a perspective view of the battery case main body of the battery concerning Embodiment 1. FIG. 1 is a perspective view of a battery sealing lid according to Embodiment 1. FIG. It is sectional drawing (CC part of FIG. 5) of the sealing lid of the battery concerning Embodiment 1. FIG. 2 is a perspective view of a heat exhaust member of a battery according to Embodiment 1. FIG. FIG. 4 is an explanatory diagram of a battery manufacturing process according to the first embodiment. 3 is an explanatory diagram of a battery manufacturing process according to Embodiment 1. FIG. It is sectional drawing (AA part of FIG. 1) of the battery concerning the modification 1. It is sectional drawing (BB part of FIG. 1) of the battery concerning the modification 1. It is a perspective view of an assembled battery according to a reference shape state. It is a cross-sectional view of an assembled battery according to the reference shape state (D-D section of FIG. 12). It is a perspective view of the battery case frame body of the assembled battery according to the reference shape state. It is a perspective view of the intervening sealing plate of the battery pack according to the reference shape state. It is an explanatory view of a manufacturing process of the battery pack according to the reference shape state. It is an explanatory view of a manufacturing process of the battery pack according to the reference shape state. It is explanatory drawing of the assembled battery concerning Embodiment 3. FIG. It is explanatory drawing of the vehicle concerning Embodiment 4. FIG. It is explanatory drawing of the hammer drill concerning Embodiment 5. FIG. It is sectional drawing (AA part of FIG. 1) of the battery concerning a deformation | transformation form.

1,101 Battery 10, 110 Battery case 10X, 110X, 210X Resin fusion welding part 20 Battery case body (case body member)
20B, 220B Opening 20E Opening peripheral edge 21T Main body side inner wall surface (enclosure surface)
21TM Main body side facing inner wall (enclosure)
22 Main body resin wall (resin housing wall, space-facing resin wall)
22F Body space side (space side)
30,130 Sealing lid (lid member)
32,132 Lid center wall (heat exhaust wall, lid wall)
32P, 132P Central resin wall (resin housing wall, resin exhaust heat wall)
32T, 132T Inner wall surface on the lid side (enclosed surface, maximum enclosed surface)
33 Lid edge (periphery connection part)
40, 140, 240 Heat exhaust member 41, 141, 241 Heat absorption part 43, 143, 243 Middle part (rigidity improvement part)
44, 144, 244 Heat radiation part 49, 149, 249 Endothermic surrounding part 50 Power generation element 132F Cover space side surface (exhaust heat wall part space side surface)
132M Lid resin inner wall (resin housing wall, resin heat exhaust wall)
132N Lid resin outer wall (resin housing wall, resin heat exhaust wall)
200,300 assembled battery 210 assembled battery case 222 frame resin wall (resin housing wall)
232 Intervening central wall (intervening exhaust heat wall)
232P Intervening central resin wall (resin housing wall, intervening resin housing wall, intervening resin heat exhaust wall)
500 Vehicle 600 Hammer drill (Battery equipped equipment)
610 Battery pack (battery, assembled battery)
AF first permeation prevention film (first moisture permeation prevention material)
BF second permeation prevention film (second moisture permeation prevention material, electrolyte solution permeation prevention material)
BS metal plate (second moisture permeation prevention material, electrolyte solution permeation prevention material)
CS accommodation space DB second direction (thickness direction)
ES Non-aqueous electrolyte (electrolyte)
MU Maximum resin housing wall ZF Insulating film (insulating coating)

Claims (11)

Power generation elements and
A battery case comprising a battery case that encloses a housing space that houses the power generation element and has a resin housing wall portion made of an insulating resin that surrounds at least a part of the housing space,
Provided with a heat exhaust member made of a good heat conductive material having a higher thermal conductivity than the insulating resin,
A part of the exhaust heat member is embedded in the resin exhaust heat wall part, which is at least a part of the resin storage wall part, or disposed closer to the storage space than the resin exhaust heat wall part, and the resin exhaust heat wall part And an exhaust heat wall part, a heat absorption part that absorbs heat in the accommodation space,
Another part of the heat exhaust member is disposed outside of the battery case, Ri radiating portion der for radiating heat conducted from the heat absorbing part to the outside of the battery case,
The battery case is
A case body member having an opening;
A lid member that closes the opening,
The lid member is
Comprising the heat exhaust member,
Facing the opening, having a lid wall portion surrounding a part of the accommodation space;
At least a part of the lid wall part is the exhaust heat wall part,
The lid member is
It is located around the lid wall part, and has an annular peripheral connection part that connects with the opening peripheral part that forms the peripheral part of the opening among the case body members,
The exhaust heat member is
Extending from the endothermic part in the lid wall part and having an endothermic peripheral part located in the peripheral edge connecting part,
The opening peripheral part of the case body member and the peripheral connection part of the lid member are formed by fusion welding of the insulating resin forming the opening peripheral part and the insulating resin forming the peripheral connection part, A battery which is fixed to each other via an annular resin fusion-bonding portion surrounding the opening . The battery according to claim 1 ,
A battery in which all of the lid wall portion of the lid member is the exhaust heat wall portion. The battery according to claim 1 or 2 ,
The electrolytic solution is stored in the housing space,
A battery comprising an insulating coating that isolates and insulates between the electrolytic solution and the heat absorbing part on the housing space side of the heat absorbing part of the exhaust heat member. The battery according to claim 1 or 2 ,
The electrolytic solution is stored in the housing space,
The heat absorption part of the heat exhaust member is embedded in the resin heat exhaust wall part,
The exhaust heat member covers the heat exhaust wall portion side surface facing the accommodation space in the resin heat exhaust wall portion, and the electrolyte penetrates the resin heat exhaust wall portion from the heat exhaust wall portion space side surface. A battery having an electrolyte penetration preventing material that prevents it from reaching the battery. The battery according to any one of claims 1 to 4 ,
The exhaust heat member is formed by bending a flat plate,
The plate-like heat absorbing part;
A battery having a rigidity improving portion that is bent with respect to the heat absorbing portion and that improves the rigidity of the heat absorbing portion in the thickness direction. The battery according to any one of claims 1 to 5 ,
The housing space is composed of a plurality of surrounding surfaces,
The battery in which the maximum resin-accommodating wall portion constituting the largest enclosing surface having the largest area among the plurality of enclosing surfaces of the resin-accommodating wall portions forms the exhaust heat wall portion. The battery according to any one of claims 1 to 6 ,
Except for the resin exhaust heat wall portion of the resin accommodation wall portion, the space facing resin accommodation wall portion facing the accommodation space is insulated from the exhaust heat member over the entire space side surface facing the accommodation space. A first moisture permeation prevention material that prevents permeation of moisture between the housing space and the outside of the battery case through the space facing resin housing wall,
The exhaust heat wall is
The housing space side of the resin exhaust heat wall,
A second moisture permeation preventive material that is insulated from the heat absorption part and prevents moisture permeation between the inside of the housing space and the outside of the battery case through the resin heat exhaust wall part, or
A battery having the heat absorbing portion made of a material that does not allow moisture to permeate in its thickness direction. The battery according to claim 7 ,
A battery comprising a non-aqueous electrolyte in the housing space. An assembled battery in which a plurality of the batteries according to any one of claims 1 to 8 are arranged. A vehicle equipped with the battery according to any one of claims 1 to 8 , or the assembled battery according to claim 9 . The battery mounting apparatus which mounts the battery of any one of Claims 1-8 , or the assembled battery of Claim 9 .

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