JP2014029960A - Capacitor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a capacitor device capable of preventing malfunctions or the like of abnormality detection means due to an environment outside the capacitor device, and accurately detecting abnormality when the abnormality related to a capacitor body occurs.SOLUTION: The capacitor device includes a storage case 3 where a plurality of storage parts for storing the capacitor body are formed, the plurality of storage parts are turned to the same direction with each other in the longitudinal direction thereof and are annularly disposed, and the plurality of capacitor bodies are stored in the respective storage parts in the state that the terminal part sides thereof are disposed in the same direction. Abnormality detection means 57 for detecting abnormality related to the capacitor body is provided on a position surrounded by the plurality of storage parts.

Description

  The present invention has a storage case formed with a plurality of storage portions for storing the capacitor body, the plurality of storage portions are arranged in an annular shape with their longitudinal directions facing each other, and the plurality of capacitor bodies are In addition, the present invention relates to a capacitor device that is housed in each of the housing portions in a state where the terminal portions are arranged in the same direction.

  Conventionally, in a secondary battery (capacitor main body), when overcharging is performed beyond an appropriate charging condition, the secondary battery generates heat, and a large amount of gas is generated from the electrolytic solution in the secondary battery. If the pressure inside the secondary battery rises due to the generation of this gas, the outer case may be ruptured. Therefore, when a secondary battery, a temperature sensitive switch (abnormality detection means), and a thermal fuse constitute a series circuit, and this series circuit and a Zener diode are connected in parallel, the secondary battery becomes hot. In addition, the temperature sensitive switch detects an increase in the temperature of the secondary battery and is opened, and at the same time, a current flows through the Zener diode, the Zener diode generates heat, and the temperature fuse is blown by the temperature increase of the Zener diode. (For example, refer to Patent Document 1).

JP-A-2-237437 (page 3, FIG. 1)

  In the protection circuit described in Patent Document 1, a temperature-sensitive switch (abnormality detection means) is provided so as to operate properly even in a relatively low temperature condition. However, when such a secondary battery (capacitor main body) circuit is arranged in an engine room of an automobile or the like, a heat generating device such as an engine or a radiator is disposed close to the temperature sensitive switch, and these heat generating devices There is a possibility that the temperature sensitive switch may malfunction due to the influence of the above, and there is a problem that it is impossible to accurately detect an abnormality related to the secondary battery and to properly protect the secondary battery from overcharging.

  The present invention has been made paying attention to such a problem, and can prevent malfunction of the abnormality detecting means due to the external environment of the capacitor device, and when abnormality relating to the capacitor body occurs, An object of the present invention is to provide a capacitor device that can accurately detect the above.

In order to solve the above problems, the capacitor device of the present invention is:
A plurality of storage portions, each of which has a storage case formed therein, wherein the plurality of storage portions are arranged in an annular shape with their longitudinal directions facing each other in the same direction; The capacitor device is housed in each of the housing portions in a state where the sides are arranged in the same direction,
An abnormality detection means for detecting an abnormality related to the capacitor body is provided at a position surrounded by the plurality of storage portions.
According to this feature, the abnormality detection means is arranged surrounded by a plurality of storage units, the abnormality detection means is not exposed to the outside of the storage case, and the abnormality detection means is affected by the environment outside the capacitor device. This makes it difficult to prevent malfunction of the abnormality detection means caused by the environment outside the capacitor device, and when abnormality relating to the capacitor body occurs, the abnormality can be accurately detected.

The capacitor device of the present invention is
The abnormality detecting means is provided in a hollow portion formed at a position surrounded by the plurality of storage portions.
According to this feature, a space for arranging the abnormality detecting means can be secured, and the capacitor device can be downsized by arranging a plurality of capacitor bodies in a compact manner.

The capacitor device of the present invention is
At least two storage cases that store the capacitor body are connected in the longitudinal direction, and the abnormality is located in the vicinity of the terminal portion side of the capacitor body in one storage case that is a connection part of the storage cases. It is characterized by the arrangement of the detection means.
According to this feature, among the storage cases that are continuously provided in the longitudinal direction, the vicinity of the terminal portion side of the capacitor body in one storage case that is a continuous connection portion between the storage cases is most affected by the external environment. It is a position that is difficult to receive, and by arranging the abnormality detection means at this position, it is possible to prevent malfunction of the abnormality detection means due to the external environment.

The capacitor device of the present invention is
The abnormality detecting means is configured to detect the abnormality by contacting a connecting member electrically connected to a terminal portion of the capacitor main body.
According to this feature, the condition of the capacitor body is reflected on the connecting member via the terminal portion. Therefore, when an abnormality occurs in the capacitor body by detecting the abnormality of the connecting member, the abnormality is immediately detected. The detection means can detect.

The capacitor device of the present invention is
The connection member is an input terminal or an output terminal connected to the outside of the storage case.
According to this feature, the status of the external electrical circuit is reflected in the connection member, so that when an abnormality occurs in the external electrical circuit by detecting an abnormality in the connection member, an abnormality occurs in the capacitor body. In addition, the abnormality detection means can be detected immediately.

The capacitor device of the present invention is
A capacitor device comprising a capacitor circuit in which a fuse fused with a predetermined amount of power and the plurality of capacitor bodies are connected in series,
The abnormality detecting means has a switch connected in parallel to the capacitor circuit, and the switch is turned on when the abnormality is detected.
According to this feature, when the abnormality detection means detects an abnormality and the switch is turned on, the capacitor circuit is short-circuited, and the fuse is blown by the electric power stored in the plurality of capacitor bodies, and the operation of the capacitor device Can be stopped.

The capacitor device of the present invention is
The abnormality detecting means is a thermostat that operates when a predetermined temperature is reached.
According to this feature, an abnormality related to the capacitor body is likely to be manifested by a temperature change such as an abnormal temperature rise. Therefore, by using a thermostat, an abnormality detecting means can be provided with a simple configuration, and the manufacturing cost of the capacitor device is increased. Can be reduced.

The capacitor device of the present invention is
The temperature sensing portion of the thermostat is in contact with a connection member that is an input terminal or an output terminal connected to the outside of the storage case, and the terminal portion of the thermostat is connected to the connection member. It is characterized by.
According to this feature, since the state of the electric circuit outside the storage case is reflected on the connection member, the temperature abnormality of the connection member is detected by the temperature sensing part of the thermostat, and the electric circuit outside the storage case is detected. When an abnormality occurs in the capacitor body, the thermostat can immediately detect the abnormality, and the thermostat terminal is connected to the connection member, so that the thermostat and the connection member are compactly arranged. Thus, the capacitor device can be reduced in size.

It is the perspective view which shows the state which looked at the capacitor | condenser apparatus in an Example from the upper side. It is a perspective view which shows the state which looked at the capacitor | condenser apparatus from the downward side. It is a perspective view which shows a capacitor | condenser main body and a storage case. It is a perspective view which shows a storage case. It is a perspective view which shows the state which attached the center guide to the storage case. It is a perspective view which shows the state which attached the thermostat and the bus bar to the center guide. It is a perspective view which shows the state which looked at the terminal part of the thermostat from the downward side. It is an expansion perspective view which shows the fixed nail | claw of a center guide, and the support nail | claw of a bus bar. It is a perspective view which shows a thermostat and an external bus bar. It is a cross-sectional top view which shows the open cavity part of a storage case. It is a circuit diagram which shows the circuit structure of a capacitor | condenser apparatus.

  EMBODIMENT OF THE INVENTION The form for implementing the capacitor | condenser apparatus which concerns on this invention is demonstrated below based on an Example.

  The capacitor device according to the embodiment will be described with reference to FIGS. Reference numeral 1 in FIG. 1 denotes a capacitor device to which the present invention is applied. As shown in FIGS. 1 and 2, in the capacitor device 1 of this embodiment, two storage cases 3 in which a plurality of capacitor main bodies 2 are stored are connected to each other in the vertical direction (longitudinal direction). In addition, this capacitor | condenser apparatus 1 is mainly mounted and used for vehicles, such as a motor vehicle.

  Here, since the two storage cases 3 arranged in the vertical direction have the same configuration, the storage case 3 disposed on the lower side will be described in detail below as an example. First, as shown in FIG. 3, five (a plurality of) capacitor bodies 2 are integrally stored in one storage case 3. In this embodiment, an electric double layer capacitor is used for the capacitor body 2. The capacitor body 2 has a cylindrical shape, and a sealing plate 6 at the upper end of the capacitor body 2 is provided with terminal portions 4 for positive and negative electrodes. In addition, the storage case 3 is provided with five (a plurality of) storage portions 5 for storing the capacitor main bodies 2, and the storage case 3 is opened at the upper side thereof, and the storage case 3 has five openings through the opening 9. The storage unit 5 is exposed to the outside.

  The storage case 3 is made of resin in which the five storage portions 5 are integrally molded. As the resin material constituting the storage case 3, a thermoplastic resin is used, and for example, polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, nylon, polyphenylene sulfide, acrylic, polycarbonate, or the like is used. Moreover, the glass fiber etc. can be added to various resin materials as an additive, and the intensity | strength and heat resistance of the storage case 3 can also be improved. The storage case 3 is formed by resin molding in which a resin material is poured into a mold. Therefore, the storage case 3 can be easily mass-produced, and the capacitor device 1 can be manufactured at a low cost.

  Further, the five storage portions 5 of the storage case 3 have a cylindrical shape that matches the shape and dimensions of the capacitor body 2, and each storage portion 5 has a bottomed cylindrical shape with one end opened and the other end closed. I am doing. And each storage part 5 is arrange | positioned cyclically | annularly in planar view so that the longitudinal direction may mutually face the same direction. Further, a connecting portion 39 that connects the adjacent storage portions 5 to each other is formed between the storage portions 5, and the central portion of the storage portion 5 that is annularly arranged is located inside the capacitor body 2. An open cavity portion 7 in which the generated hydrogen gas is released is formed (see FIG. 10).

  Further, a wall portion 8 extending upward is formed on the upper side of the storage portion 5. The wall portion 8 is erected so as to surround the outer periphery of the arrangement shape according to the arrangement shape of the five storage portions 5. A circuit arrangement portion 20 that can arrange an internal bus bar 55 for electrically connecting terminal portions 4 of the capacitor bodies 2 to be described later, a circuit board (not shown) provided with a balance circuit, and the like by the wall portion 8 is provided. It is formed. Further, the wall 8 is provided with two through holes 56 that penetrate from the inside of the storage case 3 to the outside.

  Further, as shown in FIG. 3, the upper end portion of the connecting portion 39 that connects the storage portions 5 of the storage case 3 and the corner portion formed by the wall portion 8 are directed toward the center and upward of the storage case 50. A case protrusion 42 extending in the direction is formed. One case convex portion 42 is provided between the storage portions 5. The upper end portion of the connecting portion 39 around the case convex portion 42 has a function as a contact surface 43 with which a bottom surface (lower surface) of a center guide 23 (element member) described later contacts.

  A cylindrical hole 44 (hollow portion) having a substantially cylindrical shape is formed in the central portion on the upper side of the storage case 3 so as to penetrate toward the open cavity 7 in the central portion of the storage portion 5 arranged in an annular shape. Is formed. Note that a thermostat 57 (abnormality detection means) described later can be disposed in the cylindrical hole portion 44.

  Further, around the cylindrical hole portion 44, five (a plurality of) outlet holes 45 are formed for allowing the gas generated in the capacitor body 2 to be led out toward the open cavity portion 7 described above. The lead-out hole 45 is formed in a substantially triangular shape in a valley portion surrounded by the storage portions 5. Further, among these five lead-out holes 45, a stepped portion 46 is formed above the four lead-out holes 45 as appropriate so as to form a substantially triangular shape in the valley portion between the adjacent storage portions 5. .

  Further, on the side peripheral surface of the upper portion of the storage portion 5, nuts (in the figure) to which a plurality of storage cases 3 are connected and bolts 58 for fixing other members to the storage case 3 are screwed. An upper nut holding portion 14 is formed to hold (not shown). Further, a lower nut holding portion 15 is also formed on the side peripheral surface of the lower portion of the storage portion 5. These upper and lower nut holding portions 14 and 15 are configured to provide a space for holding the nut using a valley between the storage portions 5.

  Next, as shown in FIG. 5, a center guide 23 is attached to the storage case 3 in which the five capacitor bodies 2 are stored so as to cover the five capacitor bodies 2 from above. The center guide 23 is a resin-made plate member having a substantially star shape whose outer peripheral edge is substantially the same as the overall shape of the five storage portions 5 combined. In addition, resin which comprises this center guide 23 is resin similar to the storage case 3 mentioned above.

  In addition, a bent piece 24 bent downward is formed on the edge of the portion bulging outward on the edge of the center guide 23. On the outer surface side of the bent piece 24, a convex ridge 47 is extended in the vertical direction, and this ridge 47 is brought into contact with the inner peripheral surface of the wall portion 8 of the storage portion 5, and the center guide 23. The radial positioning with respect to the storage case 3 is performed.

  Further, on the edge of the center guide 23, a portion which is a valley between the portions bulged outwardly is paired with the case convex portion 42 of the storage case 3 described above, and is a guide recessed in a substantially U shape. A recess 48 (locking portion) is provided. The guide recess 48 is locked to the case convex portion 42 of the storage case 3 when the center guide 23 is stored in the storage case 3. The guide concave portion 48 of the center guide 23 is guided in the vertical direction along the case convex portion 42 of the storage case 3.

  Thus, the center guide 23 is positioned with respect to the storage case 3 in a state where the guide concave portion 48 of the center guide 23 is engaged with the case convex portion 42 of the storage case 3. Since the center guide 23 is positioned with respect to the storage case 3 by the case convex portion 42 of the storage case 3 and the guide concave portion 48 of the center guide 23 as described above, the center guide 23 is attached to the storage case 3. The capacitor device 1 can be manufactured easily.

  As shown in FIG. 5, an insertion hole 26 through which the terminal portion 4 of the capacitor body 2 is inserted is formed on the upper surface of the center guide 23. Further, a protruding rod 31 that is engaged with the hole 30 formed in the internal bus bar 55 and the engaging hole (not shown) on the lower surface of the circuit board (not shown) is protruded. Further, on the upper surface of the center guide 23, a bus bar engaging convex portion 40 with which the internal bus bar 55 is engaged along the edge protrudes, and a hook-like engagement that is engaged with the edge of the circuit board. A claw 41 is provided. Positioning of the internal bus bar 55 and the circuit board is performed by the protruding bar 31, the bus bar engaging convex part 40, and the locking claw 41. The balance circuit of the circuit board is connected to each bus bar.

  Further, the center guide 23 has an annular shape in plan view, and a center hole 49 is formed in the center portion of the center guide 23 at a position corresponding to the cylindrical hole portion 44 of the storage case 3. The central hole 49 guides the gas flowing to the upper surface side of the center guide 23 to the outlet hole 45 of the storage case 3. The center hole 49 is formed in the center guide 23 at a position surrounded by the plurality of insertion holes 26. When the capacitor main body 2 and the internal bus bar 55 are attached to the center guide 23, the capacitor main body 2 and the internal hole 49 are formed. A bus bar 55 is arranged around the central hole 49.

  Furthermore, four hook-shaped fixing claws 53 that protrude downward are provided in the central hole 49 of the center guide 23. The center guide 23 is fixed to the storage case 3 by the fixing claw 53. The four (plural) fixing claws 53 are arranged side by side in the circumferential direction of the central hole 49. The fixed claw 53 protrudes horizontally toward the inside of the central hole 49, is bent in the circumferential direction of the central hole 49, and further extends below the center guide 23. The tip is formed in a bowl shape.

  By being bent in a plurality of directions as described above, the fixed claw 53 is easily bent, and when the center guide 23 is attached to the storage case 3, the fixed claw 53 can be bent and attached easily. Further, as shown in FIG. 8, the fixing claw 53 of the center guide 23 is engaged with the step 46 of the storage case 3 described above. Furthermore, the directions of the hook-shaped tip portions of the four fixing claws 53 are arranged so as to face each other in the opposite direction so that they do not wobble when the center guide 23 is fixed.

  The capacitor device 1 according to the present embodiment is mounted on a device such as a vehicle and used so that a load or vibration applied during traveling of the vehicle is also applied to the capacitor body 2 and the internal bus bar 55. It has become. The center guide 23 receives a load and vibration applied during traveling of the vehicle from the capacitor body 2 and the internal bus bar 55 fixed to the plurality of insertion holes 26. The resulting stress is applied to the center guide 23. However, as shown in FIG. 5, since the fixing claws 53 of the center guide 23 are provided side by side in the circumferential direction of the center hole 49, even if a load or vibration is applied to the center guide 23, this load or vibration The stress resulting from the above is dispersed in the plurality of fixed claws 53, and it is possible to prevent some of the fixed claws 53 from being fatigued and cracked or broken.

  As shown in FIG. 7, the distal end portion of the fixing claw 53 formed in a bowl shape has a tapered surface 54 that protrudes toward the outer peripheral side of the center guide 23 and is inclined. When the center guide 23 is attached to the storage case 3, the tapered surface 54 of the fixed claw 53 comes into contact with the step 46 of the storage case 3, so that the tip of the fixed claw 53 is easily bent along the step 46. Thereafter, the distal end portion of the fixing claw 53 that has passed through the step portion 46 is easily locked to the step portion 46. As shown in FIG. 8, the fixing claw 53 of the center guide 23 is locked to the step portion 46 of the storage case 3, so that the fixing property between the storage case 3 and the center guide 23 can be improved. In particular, it is effective when the capacitor device 1 is used for a vehicle application in which vibration is applied.

  As shown in FIG. 6, each terminal portion 4 of the capacitor body 2 protrudes upward from the insertion hole 26 of the center guide 23, and an internal bus bar 55 is connected to the terminal portion 4, so that each of the five capacitor bodies 2. Are electrically connected in series. For connection between each terminal portion 4 and the internal bus bar 55, screw connection, laser connection, ultrasonic connection, or the like is used.

  The internal bus bar 55 that connects the terminal portions 4 of the capacitor body 2 has a bent bar shape, and the terminal portions 4 of the adjacent capacitor bodies 2 are connected to each other. Further, a positive electrode bus bar 60 and a negative electrode bus bar 61 are connected to the terminal portions 4 of the two capacitor bodies 2 that are connected in series and serve as electrical ends in the storage case 3. The positive electrode bus bar 60 and the negative electrode bus bar 61 are respectively connected to an external bus bar 62 disposed outside the storage case 3 as described later.

  The positive bus bar 60 of the lower storage case 3 extends from the terminal portion 4 of the capacitor body 2 to the upper portion of the cylindrical hole portion 44 of the storage case 3, and has a substantially circular shape that is substantially the same size as the cylindrical hole portion 44. A shaped portion 63 is formed. Then, two projecting portions 64 projecting opposite to each other are provided on the outer periphery of the substantially circular portion 63. In addition, a bent portion 66 bent downward is provided on the edge of the substantially circular portion 63 on the side facing the positive electrode terminal portion 65 (see FIG. 7). Further, supported portions 68 supported by the support claws 67 of the center guide 23 described above are formed between the bent portion 66 and the protruding portion 64 on the outer periphery of the substantially circular portion 63 (FIGS. 6 and 6). (See FIG. 8).

  The positive bus bar 60 is locked by the support claws 67 provided on the center guide 23, so that the fixing property of each member such as the positive bus bar 60 and the thermostat 57 can be improved. This is effective when the capacitor device 1 is used for an application.

  As shown in FIGS. 6 and 7, a thermostat 57 that operates according to the temperature condition (temperature increase) of a predetermined portion is provided on the lower surface of the substantially circular portion 63 of the positive electrode bus bar 60. Are attached to each other via a screwing member 69. In the thermostat 57, the temperature sensing portion 90 is in contact with the lower surface of the substantially circular portion 63 of the positive electrode bus bar 60. The thermostat 57 is stored in the cylindrical hole 44 of the lower storage case 3 among the two storage cases 3 connected in the vertical direction (see FIG. 1).

  Further, the positive terminal portion 70 of the thermostat 57 is fixed to the bent portion 66 of the positive bus bar 60 by a screwing member 69, and the wire harness 72 is connected to the negative terminal portion 74 of the thermostat 57. The wire harness 72 passes through the cylindrical hole 44 and the open cavity 7 of the storage case 3 and is connected to a bottom bracket 73 (described later) provided on the bottom surface of the capacitor device 1 (see FIG. 9).

  As shown in FIG. 9, the thermostat 57 is attached to the storage case 3 below the two upper and lower storage cases 3 as described above. That is, a thermostat 57 is provided on the upper side of the lower storage case 3 that is a continuous portion of the two storage cases 3. The attachment position of the thermostat 57 is a substantially central position in the entire capacitor device 1, and is the position where the influence of the environment outside the capacitor device 1 is hardly affected.

  A harness fixing component 76 that fixes the wire harness 72 to the negative electrode terminal portion 74 of the thermostat 57 is attached to the negative electrode terminal portion 74 of the thermostat 57. The harness fixing component 76 has a substantially cylindrical shape and has an outer diameter that contacts the inner peripheral surface of the open cavity 7. A holding groove 77 that holds the wire harness 72 in the axial direction is formed on the side surface of the harness fixing component 76. By fixing and holding the connecting portion of the wire harness 72 and the negative electrode terminal portion 74 of the thermostat 57 in the holding groove 77, the fixability of the wire harness 72 is improved, and the wire harness 72 is detached from the negative electrode terminal portion 74. Is prevented.

  Further, the positive electrode bus bar 60 extends from the positive electrode terminal portion 65 of the capacitor body 2 to the through hole 56 of the storage case 3, and stores a circuit inside the storage case 3 constituted by the capacitor body 2 and the internal bus bar 55. An input / output terminal portion 78 for connecting to an external circuit of the case 3 is configured.

  On the other hand, the negative electrode bus bar 61 extends from the vicinity of the outer periphery of the central hole 49 of the center guide 23 to the through hole 56 of the storage case 3 through the negative electrode terminal portion 71 of the capacitor body 2. Similarly to the positive electrode bus bar 60, the negative electrode bus bar 61 also constitutes an input / output terminal portion 78 for connecting a circuit inside the storage case 3 to a circuit outside the storage case 3.

  Note that the positive electrode bus bar 60 and the negative electrode bus bar 61 in the upper storage case 3 extend from the vicinity of the outer periphery of the central hole 49 of the center guide 23 to the through holes 56 of the storage case 3 through the terminal portions 65 and 71 of the capacitor body 2. And an input / output terminal portion 78 for connecting to an external circuit of the storage case 3.

  As shown in FIGS. 1 and 2, in this embodiment, as described above, the two storage cases 3 in which the plurality of capacitor main bodies 2 are stored are connected to each other in the vertical direction. It is connected to the lower storage case 3 so as to be shifted by about one fifth of the horizontal direction. The two storage cases 3 are arranged such that the terminal portions 4 of the stored capacitor body 2 are on the upper side.

  In addition, the outer peripheral surface of the double storage case 3 is covered with a front bracket 79 that covers a part on the front side and a back bracket 80 that covers a part on the back side. The bottom surface of the storage case 3 on the lower side is covered with a bottom bracket 73 that covers it. Further, the front bracket 79, the back bracket 80, and the bottom bracket 73 are each made of conductive metal and are screwed using the upper side nut holding part 14 and the lower side nut holding part 15 of the storage case 3. It is fixed to the capacitor device 1 with a joint member 69. Further, the front bracket 79 and the rear bracket 80 are in contact with the bottom bracket 73, respectively, and the contact portions are fixed by screwing members 69.

  In addition, a terminal box 83 connected to an external electric circuit (see FIG. 11) such as an alternator 81 and a power device 82 mounted on a vehicle to be described later and generating electric power is provided on the outside of the rear bracket 80 with a screw member 84. Is attached through.

  As shown in FIG. 9, the external bus bar 62 extends from the terminal box 83 and is connected to the input / output terminal portion 78 on the positive electrode side of the lower storage case 3. In FIG. 9, some members such as the storage case 3 and the capacitor main body 2 are omitted to facilitate understanding.

  The front bracket 79 and the rear bracket 80 are grounded in the electric circuit of the vehicle body. The negative input / output terminal portion 78 of the lower storage case 3 is connected to the positive input / output terminal portion 78 of the upper storage case 3 via the external bus bar 62. A fuse box 86 containing a fuse 85 (see FIG. 11) that is blown when a predetermined amount of power flows is provided near the upper portion of the upper storage case 3. The input / output terminal part 78 on the negative electrode side of the storage case 3 is connected.

  Further, as shown in FIGS. 1 and 2, the outlet terminal portion 87 of the fuse box 86 is connected to the front bracket 79. That is, the negative terminal portion 74 of the thermostat 57 and the outlet terminal portion 87 of the fuse box 86 are electrically connected to each other via the front bracket 79, the bottom bracket 73, and the wire harness 72. Further, any of the external bus bars 62 arranged outside the storage case 3 is covered with a synthetic resin case.

  As described above, the protection circuit 88 is configured by electrically connecting the two storage cases 3. As shown in FIG. 11, in the protection circuit 88 of this embodiment, ten capacitor bodies 2 and fuses 85 are connected in series to form a capacitor circuit 89, and a thermostat 57 is connected in parallel to the capacitor circuit 89. Is done. In addition, an external electric circuit such as an alternator 81 and other power equipment 82 mounted on the vehicle is connected to the capacitor circuit 89 in parallel.

  The thermostat 57 of this embodiment is of a bimetal type and operates at an operating temperature of about 100 degrees ± 5 degrees. The thermostat 57 has a switch 91 that is switched between ON / OFF states when a bimetal built in the temperature sensing unit 90 is operated. As described above, the positive terminal portion 70 of the thermostat 57 is connected to the positive bus bar 60, and the negative terminal portion 74 of the thermostat 57 is connected to the wire harness 72 (see FIG. 7). The switch 91 of 57 is arranged between the positive terminal part 70 and the negative terminal part 74 so that the ON / OFF state is switched.

  Further, in a normal state, the thermostat 57 is maintained in the OFF state. In a state where the alternator 81 and the power device 82 are operating normally, power supply and demand is adjusted between the capacitor circuit 89, the alternator 81 and the power device 82, and the capacitor body 2 is charged or discharged.

  On the other hand, when the operation of the alternator 81 or the power device 82 is abnormal, for example, when charging is continued in a state where the output voltage of the alternator 81 greatly exceeds the rated voltage of the capacitor device 1, the capacitor circuit 89 Overvoltage is applied to the capacitor circuit 89, and a larger current than usual flows in the capacitor circuit 89. When this overvoltage continues, the capacitor main body 2 and each bus bar 55, 60, 61, 62 generate heat, and the temperature of the capacitor main body 2 and each bus bar 55, 60, 61, 62 rises. Furthermore, when the heat generation continues and the temperature at the contact portion between the thermostat 57 and the positive bus bar 60 exceeds the preset operating temperature of the thermostat 57 (about 100 degrees), the thermostat 57 is turned on and the capacitor circuit 89 is turned on. A short circuit state is established via the 57 switch 91.

  Then, the electric power stored in the capacitor main body 2 is discharged, and a larger current flows than normal in the capacitor circuit 89 via the switch 91 of the thermostat 57. Due to this current, the temperature of the fuse 85 rises and the fuse 85 is blown, and the capacitor device 1 is disconnected from the alternator 81 and the like, and it is avoided that an overvoltage is continuously applied to the capacitor body 2.

  Even when a short circuit occurs in a part of the capacitor circuit 89 in the capacitor device 1 and an overcurrent flows or when the capacitor body 2 abnormally generates heat, the temperature sensing portion of the thermostat 57 is used. When 90 exceeds a predetermined temperature, the capacitor body 2 is electrically disconnected as described above. That is, it is possible to accurately detect any abnormality inside or outside the capacitor device 1 and prevent the capacitor body 2 from being deteriorated or damaged.

  As described above, in the capacitor device 1 according to the present embodiment, the thermostat 57 for detecting an abnormality related to the capacitor body 2 is provided at a position surrounded by the plurality of storage units 5, thereby being surrounded by five (a plurality of) storage units. Therefore, the thermostat 57 (abnormality detection means) is arranged, and the thermostat 57 is not exposed to the outside of the storage case 3, and the thermostat 57 is hardly affected by the environment outside the capacitor device 1, and is caused by the external environment. The malfunction of the thermostat 57 to be performed can be prevented, and when an abnormality relating to the capacitor body 2 occurs, the abnormality can be accurately detected.

  Further, the thermostat 57 (abnormality detection means) is provided in the cylindrical hole portion 44 (hollow portion) formed at a position surrounded by the plurality of storage portions 5, thereby securing a space for arranging the thermostat 57. In addition, the capacitor device 1 can be downsized by arranging the plurality of capacitor bodies 2 in a compact manner.

  In addition, at least two storage cases 3 storing the capacitor body 2 are connected in the longitudinal direction, and the storage case 3 is connected to the terminal 4 side of the capacitor body 2 in one storage case 3. Since the thermostat 57 (abnormality detecting means) is arranged in the vicinity, the capacitor body 2 in one of the storage cases 3 that is a continuous portion of the storage cases 3 among the storage cases 3 connected in the longitudinal direction. The vicinity of the terminal portion 4 side is a position that is hardly affected by the external environment, and by disposing the thermostat 57 at this position, malfunction of the thermostat 57 caused by the external environment can be prevented. .

  Further, the thermostat 57 (abnormality detecting means) is adapted to detect abnormality by contacting the bus bars 55, 60, 61, 62 (connecting members) electrically connected to the terminal portion 4 of the capacitor body 2. Thus, since the state of the capacitor main body is reflected on the bus bars 55, 60, 61, 62 through the terminal portion 4, the abnormality of the bus bars 55, 60, 61, 62 can be detected to detect the capacitor main body. When an abnormality occurs in 2, the thermostat 57 can immediately detect the abnormality.

  Further, since the bus bar (connection member) serves as the input / output terminal portion 78 connected to the outside of the storage case 3, the bus bar 60 reflects the state of the external electric circuit. By detecting this abnormality, the thermostat 57 can immediately detect when an abnormality occurs in the external electric circuit and abnormality occurs in the capacitor body 2.

  Further, when the thermostat 57 (abnormality detecting means) detects an abnormality and the switch is turned on, the capacitor circuit 89 is short-circuited, and the fuse 85 is blown by the electric power stored in the plurality of capacitor main bodies 2, The operation of the capacitor device 1 can be stopped.

  Further, since an abnormality relating to the capacitor body 2 is easily manifested by a temperature change such as an abnormal temperature rise, the abnormality detecting means of the present invention can be provided with a simple configuration by using the thermostat 57. Manufacturing cost can be reduced.

  In addition, the temperature sensing portion 90 of the thermostat 57 (abnormality detection means) is in contact with the bus bar 60 (connection member) serving as the input / output terminal portion 78 connected to the outside of the storage case 3. Since the state of the electric circuit outside the storage case 3 is reflected, the temperature abnormality of the bus bar 60 is detected by the temperature sensing unit 90 of the thermostat 57, and an abnormality occurs in the electric circuit outside the storage case 3. When the abnormality occurs in the capacitor body 2, the thermostat 57 can immediately detect the abnormality, and the terminal portion 70 of the thermostat 57 is connected to the bus bar 60, so that the thermostat 57 and the bus bar 60 can be made compact. The capacitor device 1 can be reduced in size by being arranged.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above embodiment, an electric double layer capacitor is exemplified as the capacitor, but the capacitor to which the present invention is applied is not limited to this, and can be applied to various capacitors such as an electrolytic capacitor and an electrochemical capacitor, and a capacitor.

  Moreover, in the said Example, although the cylindrical capacitor | condenser main body 2 was illustrated, this invention is not limited to this, It can apply also to non-cylindrical capacitor | condenser main bodies, such as a square shape. In addition, if it is a square-shaped capacitor | condenser main body, what is necessary is just to adapt to the square shape and to make the storage part of a storage case into a square cylinder shape.

  Moreover, in the said Example, although the five storage parts 5 are formed in cyclic | annular form with respect to one storage case 3, the number and arrangement | positioning form of these storage parts 5 are not specifically limited, At least 2 Individual or three storage units 5, or six or seven or more storage units 5 may be formed, and the storage units may be arranged in one or a plurality of rows.

  Moreover, in the said Example, although abnormality was detected based on the temperature of the bus-bar 60 by arrange | positioning the thermostat 57 in the storage case 3, the abnormality detection means of this invention is not restricted to this, For example, Instead of the thermostat, a current sensor or a voltage sensor may be arranged as an abnormality detection means, and an abnormality may be detected based on the current or voltage input / output to / from the capacitor device 1. In that case, by further combining a relay or the like, the capacitor circuit can be short-circuited in accordance with the detection of the abnormality, and the fuse can be blown. When the abnormality detecting means is a current sensor or a voltage sensor, if these sensors are provided at a position surrounded by a plurality of storage units 5, the sensors are surrounded by the capacitor body 2 in the storage unit 5. Thus, the sensors can be protected from the influence of electromagnetic waves generated from devices such as an alternator that generates power.

DESCRIPTION OF SYMBOLS 1 Capacitor apparatus 2 Capacitor body 3 Storage case 4 Terminal part 5 Storage part 6 Sealing plate 7 Opening cavity part 8 Wall part 9 Opening part 12 Tapered surface 14, 15 Nut holding part 20 Circuit arrangement part 23 Center guide (element member)
24 bent piece 26 insertion hole 30 hole 31 projecting bar 39 connecting part 40 bus bar engaging convex part 41 locking claw 42 case convex part 43 abutting surface 44 cylindrical hole part (cavity part)
45 Lead-out hole 46 Step 47 Projection 48 Guide recess (locking part)
49 Center hole 53 Fixing claw 54 Tapered surface 55 Internal bus bar (connection member)
56 Through hole 57 Thermostat (Abnormality detection means)
58 Bolt 59 Extension part 60 Positive electrode bus bar (connection member)
61 Negative electrode bus bar (connection member)
62 External bus bar (connection member)
63 substantially circular portion 64 projecting portion 65 positive electrode terminal portion 66 bent portion 67 support claw 68 supported portion 69 screwing member 70 positive electrode terminal portion 71 negative electrode terminal portion 72 wire harness 73 bottom bracket 74 negative electrode terminal portion 76 harness fixing component 77 holding Groove 78 Input / output terminal portion 79 Front bracket 80 Rear bracket 81 Alternator 82 Power device 83 Terminal box 84 Screw member 85 Fuse 86 Fuse box 87 Outlet terminal portion 88 Protection circuit 89 Capacitor circuit 90 Temperature sensing portion 91 Switch

Claims (8)

A plurality of storage portions, each of which has a storage case formed therein, wherein the plurality of storage portions are arranged in an annular shape with their longitudinal directions facing each other in the same direction; The capacitor device is housed in each of the housing portions in a state where the sides are arranged in the same direction,
An apparatus for detecting an abnormality related to the capacitor body is provided at a position surrounded by the plurality of storage units.   2. The capacitor device according to claim 1, wherein the abnormality detection unit is provided in a cavity formed at a position surrounded by the plurality of storage units.   At least two storage cases that store the capacitor body are connected in the longitudinal direction, and the abnormality is located in the vicinity of the terminal portion side of the capacitor body in one storage case that is a connection part of the storage cases. 3. The capacitor device according to claim 1, further comprising a detecting unit.   The said abnormality detection means contacts the connection member electrically connected to the terminal part of the said capacitor | condenser main body, and detects the said abnormality, The Claim 1 thru | or 3 characterized by the above-mentioned. Capacitor device.   The capacitor device according to claim 4, wherein the connection member is an input terminal or an output terminal connected to the outside of the storage case. A capacitor device comprising a capacitor circuit in which a fuse fused with a predetermined amount of power and the plurality of capacitor bodies are connected in series,
The said abnormality detection means has a switch connected in parallel with the said capacitor circuit, and when this abnormality is detected, this switch turns ON. Capacitor device.   The capacitor device according to claim 1, wherein the abnormality detection unit is a thermostat that operates when a predetermined temperature is reached.   The temperature sensing portion of the thermostat is in contact with a connection member that is an input terminal or an output terminal connected to the outside of the storage case, and the terminal portion of the thermostat is connected to the connection member. The capacitor | condenser apparatus of Claim 7 characterized by these.

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