JP2010108699A - Electric storage device and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric storage device capable of accurately detecting the temperature of a battery by embedding a temperature sensor 6 in a resin frame 5 integrally fixed to the outer surface of a metallic case 2, and to provide a method for manufacturing the same. <P>SOLUTION: A nonaqueous electrolyte secondary battery 1 using the metallic case 2 includes the resin frame 5 fixed to a portion of the outer surface of the metallic case 2 by making resin-molding on the outer surface of the metallic case 2, and in such a state that a temperature detecting part of the temperature sensor 6 is brought into contact with the outer surface of the metallic case 2 when making resin-molding, the temperature sensor 6 is embedded in the resin frame 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power storage device using a metal case and a method for manufacturing the same.

  When using a large nonaqueous electrolyte secondary battery using a metal case as a battery outer case for an assembled battery, the battery is conventionally covered with a heat-shrinkable tube and sandwiched between a pair of synthetic resin frames. A plurality of them are arranged adjacent to each other and sandwiched from both sides (see, for example, Patent Document 1). The reason why such a frame body is used for the assembled battery is to arrange a plurality of batteries through the frame body so that a gap for cooling is provided between the batteries. In addition, a plurality of batteries are not housed in one assembled battery case, and the batteries are assembled in such a manner that they are sandwiched between frames in this way. Therefore, it is possible to flexibly cope with the difference in the number of batteries.

  The reason why the metal case of the nonaqueous electrolyte secondary battery is covered with the heat shrinkable tube is to insulate and prevent corrosion of the outer surface of the metal case. The surface can be covered with an insulating coating film by electrodeposition coating (see, for example, Patent Document 2). Since the insulating coating film by electrodeposition coating is a coating film formed in an electrodeposition tank and then dried and baked, it becomes an insulating material having a smaller film thickness and easier heat dissipation than a heat-shrinkable tube.

Here, the battery generates heat during charging and discharging, and the non-aqueous electrolyte secondary battery may become high temperature due to this heat generation, so not only a gap for cooling between the batteries as described above, In some cases, a temperature sensor is attached to each battery, and the battery temperature detected by the temperature sensor is monitored. In the case of the above assembled battery, conventionally, for example, a temperature sensor is incorporated into a resin fitting, and this fitting is attached to a frame, so that the heat shrinkable tube in the metal case of the nonaqueous electrolyte secondary battery is attached. The detection part of the temperature sensor is in contact with the uncovered bottom surface.
JP2003-346754 JP2007-242602

  However, in the case of a narrow rectangular metal case, the battery has the widest side surface, and in the case of a cylindrical metal case, the cylindrical side surface is closest to the internal power generation element. The temperature of the portion (in the case of a cylindrical shape, the central portion in the axial direction) is the highest, indicating an accurate battery temperature. For this reason, even if the detection part of the temperature sensor is brought into contact with the bottom surface of the metal case, the temperature rise is less than that on the side surface.

  In addition, when the outer surface of the metal case is covered with an insulating coating film by electrodeposition coating instead of the heat shrinkable tube, the bottom and side surfaces of the metal case are only covered with the same thin insulating coating film. The battery temperature can be detected more accurately by bringing the portion into contact with the side surface of the metal case. However, for example, when a rectangular metal case with a narrow width is used, the assembled battery is generally configured by arranging the widest side surfaces of each battery face to face. There arises a problem that it becomes difficult to attach the temperature sensor to the central portion of the wide side surface. This is because not only is it difficult to attach the temperature sensor through a narrow gap after the assembled battery is assembled, but the pair of frames are integrated with the battery for the first time when the assembled battery is assembled. This is because it is difficult to accurately contact the detection part of the temperature sensor with the side surface of the metal case after assembling the assembled battery.

  Furthermore, not only in the case of a battery pack, but also in the case of a battery alone, the place where the temperature rises most on the outer surface of the metal case is the place where the most cooling air should flow through natural ventilation or forced ventilation. Even if the temperature sensor is brought into contact with this place, the temperature of the outer surface and the temperature sensor itself is locally lowered due to the influence of cooling air, and the accurate battery temperature cannot be detected. There was also.

  The present invention intends to provide a power storage device capable of accurately detecting a battery temperature or the like by embedding or attaching a sensor to an integrated resin frame fixed to an outer surface of a metal case, and a method for manufacturing the same. It is.

  According to a first aspect of the present invention, in a power storage device using a metal case, the resin case is fixed on a part of the outer surface of the metal case by molding the resin on the outer surface of the metal case. And a resin frame in which all or a part of the sensor is embedded in a state in which the detection portion of the sensor is in contact with or close to the outer surface of the metal case.

  The invention according to claim 2 is characterized in that the resin frame is embedded with all or a part of the sensor and the wiring of the sensor when resin molding is performed.

  According to a third aspect of the present invention, in a power storage device using a metal case, the resin case is fixed on a part of the outer surface of the metal case by molding the resin on the outer surface of the metal case. A resin frame formed with a sensor mounting portion that communicates with the outer surface of the metal case, and a sensor mounted on the sensor mounting portion of the resin frame with the detection unit in contact with the outer surface of the metal case. Features.

  According to a fourth aspect of the present invention, in a method of manufacturing a power storage device using a metal case, resin molding is performed on the outer surface of the metal case in a state where the detection portion of the sensor is in contact with the outer surface of the metal case. Thus, a resin frame is formed which is fixed to a part of the outer surface of the metal case and in which all or part of the sensor is embedded.

  According to the first aspect of the present invention, since the sensor is embedded in the resin frame fixed and integrated on the outer surface of the metal case of the power storage device, it is easy to place the sensor on the outer surface of the metal case where accurate detection can be performed. This sensor can be arranged in For example, if the center part of the side surface of the metal case is the position where the most accurate detection is possible, the resin frame is formed by resin molding on the metal case. Since all or a part of the resin frame can be formed in an island shape, or all or a part of the resin frame can be formed in a bar shape passing through the central portion, a sensor may be embedded therein. In addition, since the resin frame in which the sensor is embedded is integrated with the metal case, after combining multiple power storage devices into a combined power storage device, it can be easily placed in the back of a gap that is difficult to assemble from the outside. Sensors can be placed.

  Moreover, since the detection part of the sensor is in contact with or close to the outer surface of the metal case, even if the metal exposed surface of the outer surface of the metal case is subjected to insulation treatment, it is not affected by this insulation treatment, The temperature of the outer surface of the metal case can be detected directly and accurately. Furthermore, since the detection part of the sensor is covered with the resin frame and is in contact with or close to the outer surface of the metal case, the temperature of the outer surface of the metal case can be accurately measured without being affected by the outside such as cooling air. Can be detected.

  According to the invention of claim 2, since the wiring of the sensor is embedded in the resin frame, the wiring between the sensor and the external detection device can be connected at an arbitrary position of the resin frame. For example, when a sensor is disposed in a gap through which cooling air passes in a battery assembly, it is possible to eliminate the possibility that wiring from the sensor may block the air passage for cooling air.

  According to the invention of claim 3, since the sensor is mounted on the sensor mounting portion of the resin frame that is fixed and integrated with the outer surface of the metal case of the power storage device, the outer surface of the metal case that can perform accurate detection This sensor can be easily placed in the upper position. For example, if the center part of the side surface of the metal case is the position where the most accurate detection can be performed, the resin frame is formed by resin molding on the metal case, so that a pin point shape is formed at the center part of this side surface. Since all or part of the resin frame can be formed, or all or part of the resin frame can be formed in a rail shape passing through the center portion, the sensor mounting portion may be formed here. In addition, since the resin frame to which the sensor is attached is integrated with the metal case, it is easy in advance to the back of gaps that are difficult to assemble from the outside after combining multiple power storage devices into a combined power storage device. A sensor can be attached to.

  In addition, since the detection part of the sensor comes into contact with the outer surface of the metal case, even if the metal exposed surface of the outer surface of the metal case is insulated, the metal case is not affected by the insulation treatment. The temperature of the outer surface can be detected directly and accurately. Furthermore, since the detection part of the sensor is covered with the resin frame and abuts on the outer surface of the metal case, for example, the temperature of the outer surface of the metal case is accurately detected without being affected by outside such as cooling air. be able to.

  According to the invention of claim 4, since the sensor is embedded in the resin frame fixed and integrated on the outer surface of the metal case of the power storage device, the sensor can be accurately positioned at a position on the outer surface of the metal case. This sensor can be easily arranged. For example, if the center part of the side surface of the metal case is the position where the most accurate detection is possible, the resin frame is formed by resin molding on the metal case. Since all or a part of the resin frame can be formed in an island shape, or all or a part of the resin frame can be formed in a bar shape passing through the central portion, a sensor may be embedded therein. In addition, since the resin frame in which the sensor is embedded is integrated with the metal case, the sensor can be easily installed in the back of gaps that are difficult to assemble from the outside after combining multiple power storage devices into a combined power storage device. Can be arranged.

  In addition, since the detection part of the sensor comes into contact with the outer surface of the metal case, or comes close to the outer surface of the metal case by a large pressure during resin molding, this metal case Even if the exposed metal surface of the outer surface of the metal case is insulated, the temperature or the like of the outer surface of the metal case can be detected directly and accurately without being affected by the insulation treatment. Furthermore, since the detection part of the sensor is covered with the resin frame and is in contact with or close to the outer surface of the metal case, the temperature of the outer surface of the metal case can be accurately measured without being affected by the outside such as cooling air. Can be detected.

  A temperature sensor can be used as the sensor. In this way, it is possible to easily attach a temperature sensor that accurately detects the temperature of the power storage device.

  Moreover, what forms a metal plate in a container shape and blocks an opening part with a cover plate can be used for a metal case. As a result, the resin frame can be molded or the insulating coating film can be formed by electrodeposition coating in the state of the container-like metal case before assembling the power storage device.

  The resin frame can be resin-molded on the outer surface of the metal case after being subjected to a surface treatment on the outer surface of the metal case so that at least a portion to which the resin frame is fixed is a fine uneven surface. In this way, since there is a fine uneven surface on the outer surface of the metal case, it can be firmly fixed to the surface of the metal case when the resin frame is molded.

  Further, the exposed metal surface on which the resin frame on the outer surface of the metal case is not fixed and the detection part of the sensor is not in contact can be covered with an insulating coating film by electrodeposition coating. In this way, only the exposed metal surface of the metal case is covered with an insulating coating film by electrodeposition coating, which not only ensures insulation and corrosion protection, but also eliminates the risk of high temperature deterioration and aging deterioration. Since the interface between the membrane and the resin frame can be tightly adhered, it is possible to prevent insufficient insulation and corrosion protection.

  In addition, as the power storage device, a nonaqueous electrolyte secondary battery can be used. In this case, there is a possibility that the metal case may swell due to heat generation due to heat generation or increase in internal pressure because it is required to be used in harsh environments and harsh usage conditions despite being high power density and high energy density. Even in a non-aqueous electrolyte secondary battery, a sensor for accurately detecting the battery temperature or accurately detecting the swelling of the metal case can be easily attached.

  The power storage device of the present invention and the power storage device manufactured by the manufacturing method of the present invention are particularly suitable for use as a power storage device (assembled battery or the like) of an assembly in which a plurality are arranged adjacent to each other through a resin frame. .

  Hereinafter, the best embodiment of the present invention will be described with reference to FIGS.

  This embodiment demonstrates the large sized nonaqueous electrolyte secondary battery 1 shown in FIG. 1, and its manufacturing method. This nonaqueous electrolyte secondary battery 1 is a rectangular battery having a narrow width in the front-rear direction, and is used for an assembled battery.

  The non-aqueous electrolyte secondary battery 1 includes a rectangular container-shaped metal case 2 as shown in FIG. 2 in which a power generation element (not shown) is accommodated and filled with a non-aqueous electrolyte. Is covered with the cover plate 3 shown in FIG. The metal case 2 is made of a metal plate such as an aluminum alloy or stainless steel, and has a rectangular container shape whose front and rear widths are narrower than those in the vertical and horizontal directions. The cover plate 3 is a metal plate similar to the metal case 2 and has a rectangular shape elongated in the left-right direction. The cover plate 3 is fitted into the upper end opening of the metal case 2 and seals the inside by closing the periphery with welding or the like. Further, positive and negative terminals 4, 4 connected to the electrodes of the power generation element inside the metal case 2 are sealed and protruded from the left and right ends of the cover plate 3. As the power generation element, a winding type in which positive and negative electrodes are wound in a long cylindrical shape through a separator is used.

  As shown in FIG. 3, the resin case 5 is formed on the metal case 2 by direct injection molding on the outer surface of the metal case 2 and fixed to the outer surface of the metal case 2. The resin molding on the outer surface of the metal case 2 is a resin molding that uses the outer surface of the metal case 2 as a part of the mold by surrounding the outer surface of the metal case 2 with a mold for resin molding. Say the law. Further, at the time of this resin molding, the temperature sensor 6 is disposed so as to enter the inside of the mold so that the tip of the temperature sensor 6 is embedded in the resin frame 5. Further, the metal case 2 is subjected to a surface treatment in which a fine uneven surface is formed on the outer surface in advance so that the resin frame 5 is firmly fixed by injection molding. However, the resin frame 5 is not fixed so as to cover the entire outer surface of the metal case 2, but is fixed only to a part of the outer surface facing the front and rear and the left and right directions on the outer surface. The heat radiation from the outer surface 2 is not disturbed.

  The resin frame 5 is arranged with a plurality of thin crosspieces 5a vertically spaced so as to surround the periphery of the four outer sides of the metal case 2 in the horizontal direction over the entire circumference. In addition, the plurality of crosspieces 5a arranged above and below are integrally connected to a central part in the front-rear direction of the outer surface facing in the left-right direction via a column part 5b arranged over the top and bottom. Further, the upper and lower ends of the resin frame 5 are formed to be slightly thicker in the vertical direction and to protrude slightly in the left-right direction. The engaging holes 5c are respectively drilled, and the engaging projections 5d are respectively projected from the rear facing surface. Therefore, as for the outer surface of the metal case 2, the outer surface is exposed as a metal exposed surface where the crosspieces 5a and the pillars 5b are not fixed, such as between the plurality of crosspieces 5a. Will be exposed as a metal exposed surface.

  The temperature sensor 6 has a tip portion embedded in the left column portion 5 b of the resin frame 5. As shown in FIG. 4, the temperature sensor 6 has a thermistor temperature detection portion 6 a disposed at the end of a cylindrical shape having a flange, and the temperature detection portion 6 a faces the left direction of the metal case 2. It is embedded in contact with the outer surface. Further, the terminals of the temperature sensor 6 protrude from the back surface of the base portion that is not embedded in the resin frame 5.

  The metal case 2 to which the resin frame 5 shown in FIG. 3 is fixed closes the upper end opening as necessary, and performs electrodeposition coating, so that the crosspieces 5a and the pillars 5b of the resin frame 5 on the outer surface are formed. The exposed metal surface, which is a portion that is not fixed and that is not in contact with the temperature detector 6a of the temperature sensor 6, is covered with an insulating coating film. Electrodeposition coating is performed by dissolving a water-soluble paint in an electrodeposition tank and immersing the metal case 2, and in the case of a cation type paint, applying a high voltage with the metal case 2 as a negative electrode and the counter electrode as a positive electrode. 2 is a coating method in which an insulating coating film is selectively formed only on a metal exposed surface where a metal surface on the outer surface of 2 is exposed. The insulating coating film formed on the exposed metal surface in this way is dried and baked to form a strong coating film that is resistant to deterioration and has both insulating properties and corrosion resistance as well as heat resistance and weather resistance.

  The metal case 2 in which the resin frame 5 is fixed and the insulating coating film is formed as described above accommodates the power generation element inside and closes the upper end opening portion with the lid plate 3, so that the non-shown shape shown in FIG. The water electrolyte secondary battery 1 is completed. The non-aqueous electrolyte is normally injected from a liquid injection port provided in the metal case 2 or the cover plate 3 after the upper end opening of the metal case 2 is closed with the cover plate 3. The mouth is sealed.

  As shown in FIG. 5, the non-aqueous electrolyte secondary battery 1 has a plurality of resin frames 5 with the surfaces facing the front and the rear overlapped, and the other engagement protrusion 5d is formed in one engagement hole 5c. The assembled battery can be obtained by inserting and arranging them adjacent to each other in the front-rear direction. This assembled battery may be stored in an appropriate assembled battery case as it is, or may be integrated by being fastened with a fastener or the like. Moreover, what is necessary is just to connect suitably between the terminals 4 of the nonaqueous electrolyte secondary battery 1 using a terminal connector. Even in such an assembled battery, since the crosspieces 5a of the resin frame 5 of the adjacent nonaqueous electrolyte secondary battery 1 are in contact with each other, a slit-like gap is provided between the upper and lower crosspieces 5a, 5a. The cooling of each non-aqueous electrolyte secondary battery 1 can be efficiently performed by flowing cooling air here. Moreover, the temperature sensor 6 of each non-aqueous electrolyte secondary battery 1 detects the battery temperature of these non-aqueous electrolyte secondary batteries 1 by connecting a terminal to an external detection device or control device (not shown). Can do.

  In the non-aqueous electrolyte secondary battery 1 having the above configuration, the temperature sensor 6 is embedded in the resin frame 5 integrated with the metal case 2, so that the battery temperature of the non-aqueous electrolyte secondary battery 1 can be accurately detected. This temperature sensor 6 can be arranged at a position. In the present embodiment, the temperature sensor 6 is arranged so that the temperature detection unit 6 a comes into contact with the central portion of the left outer surface of the metal case 2 using the column portion 5 b of the resin frame 5. In addition, since the temperature sensor 6 abuts the temperature detector 6a on the outer surface of the metal case 2 without using an insulating coating film, the temperature of the outer surface can be detected directly and accurately. Furthermore, since the temperature detection part 6a of the temperature sensor 6 is covered with the column part 5b of the resin frame 5, even when the cooling air is applied to the nonaqueous electrolyte secondary battery 1, the influence of the cooling air is not affected. Without receiving, the temperature of the outer surface of the metal case 2 can be accurately detected.

  In the above-described embodiment, a case where a part (tip portion) of the temperature sensor 6 is embedded in the column part 5b of the resin frame 5 is shown, but the entire temperature sensor 6 may be embedded in the column part 5b. . For example, if the temperature sensor 6 is replaced with a thermistor and a thermocouple is used, the temperature sensor 6 can be further reduced in size, so that it can be easily embedded in the column portion 5b.

  In the above embodiment, the temperature sensor 6 is embedded in the column portion 5b of the resin frame 5. However, the column portion 5b has a metal case when the resin frame 5 is molded as shown in FIG. 2 is formed so that the tip of the temperature sensor 6 is inserted and attached to the sensor attachment portion 5e after completion of the nonaqueous electrolyte secondary battery 1, for example. May be. Also in this case, the temperature sensor 6 is attached so that the temperature detection unit 6 a contacts the outer surface of the metal case 2. However, the hole of the sensor mounting portion 5e is closed when the insulating coating film is formed by electrodeposition coating. By the way, after resin molding of the resin frame 5, a hole that reaches the outer surface of the metal case 2 is formed by machining or the like, and this is used as the sensor mounting portion 5 e. In reality, it is difficult to fix because it is firmly fixed.

  Moreover, in the said embodiment, although the case where the temperature sensor 6 was embedded in the pillar part 5b of the resin frame 5 was shown, the position which embeds the temperature sensor 6 and the position which forms the sensor attachment part 5e are arbitrary, for example in FIG. As shown, it can be embedded in the central portion in the left-right direction of the middle beam portion 5a in the vertical direction. When such a non-aqueous electrolyte secondary battery 1 is an assembled battery as shown in FIG. 5, the front and rear surfaces of the crosspieces 5a of the resin frame 5 of the adjacent non-aqueous electrolyte secondary battery 1 come into contact with each other. The temperature sensor 6 is preferably completely embedded in the crosspiece 5a so as not to protrude at least in the front-rear direction. Moreover, the terminals of the temperature sensor 6 need to protrude from the upper and lower surfaces of the crosspiece 5a. When wiring is connected to the terminals thus protruding, the wiring is connected to the upper and lower crosspieces 5a and 5a. Since it is pulled out in the left-right direction through a narrow slit-like gap between the two, there is a possibility that the cooling air flowing through this gap is blocked. Therefore, in the temperature sensor 6 shown in FIG. 7, when the resin frame 5 is resin-molded, the wiring 6b is also embedded in the crosspiece 5a and pulled out from the pillar 5b, so that the wiring 6b The air passage is not blocked.

  When the temperature sensor 6 is embedded in the crosspiece 5a of the resin frame 5 as described above, the temperature sensor 6 is located at the center of the outer surface facing the front-rear direction having the largest area, which is the outer surface where the temperature is highest in the metal case 2. Therefore, the battery temperature of the nonaqueous electrolyte secondary battery 1 can be detected more accurately. Moreover, even in the case where the temperature sensor 6 is arranged in the cooling air passage, the temperature detection unit 6a of the temperature sensor 6 is covered with the crosspiece 5a of the resin frame 5 as in the above embodiment. Therefore, the temperature of the outer surface of the metal case 2 can be accurately detected without being affected by the cooling air.

  In addition, the temperature sensor 6 is configured such that the temperature detection unit 6a is brought into contact with any position on the outer surface of the metal case 2 as long as the temperature of the battery of the nonaqueous electrolyte secondary battery 1 can be accurately detected. Also good. Further, when the temperature sensor 6 is embedded in the resin frame 5, the resin is injected by applying a large pressure when the resin frame 5 is molded. A resin may enter between the surface and a thin resin layer of about 1 mm may be formed. For this reason, in the above-described embodiment, the case where the temperature detection unit 6a of the temperature sensor 6 is brought into contact with the outer surface of the metal case 2 has been described, but when the temperature sensor 6 is embedded in the resin frame 5, the temperature detection unit 6a is a metal. The case where it adjoins to the outer surface of case 2 may be sufficient. And the proximity | contact here means that it has approached only through the thin resin layer penetrated between the temperature detection part 6a and the outer surface of the metal case 2 in the case of resin molding in this way.

  In the above embodiment, the case where the temperature sensor 6 for detecting the battery temperature of the nonaqueous electrolyte secondary battery 1 is used has been described. However, instead of this temperature sensor 6 or together with this temperature sensor 6, for example, nonaqueous A swelling sensor (strain sensor) or the like that detects the swelling of the metal case 2 that is swollen by an increase in the internal pressure of the electrolyte secondary battery 1 can also be used, and the type of sensor is not necessarily limited to a temperature sensor.

  Moreover, in the said embodiment, although the case where the resin frame 5 was resin-molded on the outer surface of the metal case 2 by injection molding was shown, if resin molding is possible with the metal mold | die using the outer surface of the metal case 2 However, it is not necessarily limited to that by injection molding.

  Moreover, although the case where the surface treatment in which a fine uneven surface is formed on the outer surface of the metal case 2 is performed in advance has been described in the above embodiment, the resin frame 5 is securely fixed to the outer surface of the metal case 2 by resin molding. If so, such surface treatment is not necessarily required. Further, even when the surface treatment is performed on the outer surface of the metal case 2, the surface treatment is different from the formation of a fine uneven surface as long as the resin frame 5 is securely fixed. There may be. Furthermore, this surface treatment may be performed only on the portion where the resin frame 5 is fixed on the outer surface of the metal case 2 or only on the portion including the periphery thereof, conversely, only the outer surface of the metal case 2. Instead, it may be applied to the inner surface of the metal case 2 for the convenience of processing.

  Moreover, in the said embodiment, although the resin frame 5 which consists of the crosspiece 5a and the pillar part 5b was demonstrated, if it adheres to a part of outer surface of the metal case 2, the structure of this resin frame 5 is arbitrary. is there. Furthermore, the resin frame 5 does not have to be connected to all the parts, and may have a plurality of pinpoint-like or island-like parts.

  Moreover, in the said embodiment, although the case where the insulating coating film was formed by electrodeposition coating was shown, as long as it is for insulating and corrosion-proofing the metal exposed surface of the metal case 2, the coating by another coating method is performed. Alternatively, an adhesive tape or the like may be attached. Furthermore, it is not always necessary to perform such coating or attach an adhesive tape or the like if insulation or corrosion prevention is not required.

  Moreover, although the case where the cover plate 3 was made of the same metal plate as the metal case 2 was shown in the above-described embodiment, the material of the cover plate 3 is arbitrary, and the cover plate from which the positive and negative terminals 4 and 4 protrude is always necessary. It is not limited to 3. Furthermore, although the case where the rectangular container-shaped metal case 2 is used has been described in the above embodiment, the shape of the metal case 2 is arbitrary, and the metal case 2 itself constitutes a terminal or the terminal from the metal case 2 May protrude. Furthermore, the battery outer case is not limited to the one constituted by the metal case 2 and the cover plate 3, and may be a combination of the metal case 2 and other than the cover plate 3, and may be a single component or a plurality of components. The battery outer case may be configured only by the metal case made of

  Moreover, although the case where the power generation element is a wound type wound in a long cylindrical shape is shown in the above embodiment, the shape of the power generation element is arbitrary, and even if it is a normal cylindrical shape Alternatively, a power generation element such as a laminated type other than the wound type may be used.

  Moreover, in the said embodiment, although the nonaqueous electrolyte secondary battery 1 used for an assembled battery was demonstrated, even if it is the nonaqueous electrolyte secondary battery 1 used independently, it can implement similarly. Even if such a nonaqueous electrolyte secondary battery 1 is stored in a battery storage space or the like without a gap, for example, between the battery storage space and the like without using a separate frame or spacer, Since the resin frame 5 is interposed and a slit-like gap between the crosspieces 5a and 5a can be provided, the nonaqueous electrolyte secondary battery 1 can be efficiently cooled by flowing cooling air therethrough. .

  Moreover, in the said embodiment, although the nonaqueous electrolyte secondary battery 1 was demonstrated, since it is not restricted to this, what is necessary is just the electrical storage apparatus which can discharge the accumulate | stored electricity, Therefore Chemical batteries, such as a primary battery, a secondary battery, and a fuel cell In addition, an electric double layer capacitor or the like may be used.

1 is a perspective view of a nonaqueous electrolyte secondary battery according to an embodiment of the present invention. 1 is a perspective view of a metal case according to an embodiment of the present invention. 1 is a perspective view of a metal case in which a resin frame is molded according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially enlarged longitudinal sectional front view showing a temperature sensor embedded in a column part of a resin frame, showing an embodiment of the present invention. 1 is a perspective view showing a part of an assembled battery in which a plurality of nonaqueous electrolyte secondary batteries are arranged adjacent to each other, showing an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a metal case in which a resin frame having a sensor mounting portion is molded according to an embodiment of the present invention. FIG. 3 is a perspective view of a metal case showing a first embodiment of the present invention and formed with a resin frame in which a temperature sensor is embedded in a crosspiece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Nonaqueous electrolyte secondary battery 2 Metal case 3 Cover plate 4 Terminal 5 Resin frame 5a Crosspiece 5b Pillar part 5c Engagement hole 5d Engagement protrusion 5e Sensor mounting part 6 Temperature sensor 6a Temperature detection part 6b Wiring

Claims (4)

In a power storage device using a metal case,
By resin molding on the outer surface of the metal case, it is fixed to a part of the outer surface of the metal case, and the sensor detection part is brought into contact with or close to the outer surface of the metal case during the resin molding. A power storage device comprising a resin frame in which all or a part of the sensor is embedded inside in a state where the sensor is placed.   2. The power storage device according to claim 1, wherein the resin frame is formed by embedding all or a part of a sensor and wiring of the sensor when resin molding is performed. In a power storage device using a metal case,
Resin in which a sensor mounting portion is formed which is fixed to a part of the outer surface of the metal case by resin molding on the outer surface of the metal case and communicates with the outer surface of the metal case during the resin molding. Frame,
A power storage device comprising: a sensor attached to a sensor attachment part of the resin frame such that a detection part is brought into contact with an outer surface of a metal case. In a method for manufacturing a power storage device using a metal case,
In a state where the detection part of the sensor is in contact with the outer surface of the metal case, resin molding is performed on the outer surface of the metal case so that the metal case is fixed to a part of the outer surface of the metal case and A method of manufacturing a power storage device, comprising forming a resin frame in which all or part of the sensor is embedded.

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