JP2012230813A - Battery power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery power supply device which can firmly fix a temperature sensor in place and also reduce a space needed for fixation.SOLUTION: The battery power supply device comprises: a case member 3a which includes a cooling air passage 304 having a cooling air intake port 300 and which has a plurality of temperature sensor open holes 302a and 303a formed therein; a plurality of cells 2 disposed in the cooling air passage 304; and a plurality of temperature sensors 4a and 4b which respectively are inserted into the plurality of temperature sensor open holes 302a and 303a from the outside of the case, and which each include a sensor part (tip 401 and a trunk 402) inserted into the case and a head part 403 protruding from the case member 3a to the outside. Wall surfaces 3024 and 3034 installed so as to enclose the side face of the head part 403 inserted into the temperature sensor open holes 302a and 303a are formed into the case member 3a, with adhesive 7 provided so as to fill a gap between at least the wall surfaces 3024 and 3034 and the head part 403.

Description

  The present invention relates to a battery power supply device including a plurality of power storage elements housed in a housing and a temperature sensor for measuring the temperature in the housing.

  Conventionally, in a power supply device having a configuration in which a plurality of secondary battery cells are housed in a housing, a temperature sensor is provided to monitor the cell temperature (see, for example, Patent Document 1). The temperature sensor is inserted into the casing from the outside of the casing in which the secondary battery cells are stored, and is fixed to the casing by a fixing means such as a clip.

JP 2010-218755 A

  However, in the above-described configuration, the clip is widely opened to the side of the rod-shaped temperature sensor, and the engaging claw of the opened clip is engaged with the hole of the housing. Therefore, a large space for arranging the clips is necessary. Further, since the clip and the temperature sensor are fixed to the casing by engaging the engaging claw with the hole of the casing, there is a problem in terms of vibration resistance.

The battery power supply device according to claim 1 includes a housing having an outer wall in which a cooling air passage having a cooling air intake is formed, a plurality of temperature sensor through holes formed therein, and a plurality of power storage units disposed in the cooling air passage. A temperature sensor comprising: an element; and a plurality of temperature sensors, each of which is inserted from the outside of the housing for each of a plurality of temperature sensor through holes, and has a sensor portion inserted into the housing and a wiring lead-out portion protruding outward from the outer wall. A wall surface provided so as to surround a side surface of the wiring lead portion inserted into the through hole is formed on the outer wall, and an adhesive is provided so as to fill at least a gap between the wall surface and the wiring lead portion.
According to a second aspect of the present invention, in the battery power supply device according to the first aspect, the height of the wall surface is set higher than the height of the wiring lead-out portion.
According to a third aspect of the present invention, in the battery power supply device according to the first aspect, the height of the adhesive provided in the gap between the wall surface and the wiring lead-out portion is set lower than the height of the wall surface.
According to a fourth aspect of the present invention, in the battery power supply device according to any one of the first to third aspects, the plurality of temperature sensors detect the temperature of the power storage element when the sensor unit is in thermal contact with the power storage element. And a second temperature sensor having a sensor portion disposed in the cooling air passage and detecting an air temperature of the cooling air passage, and the second temperature sensor is inserted at the top. A convex part having a through hole and adjusting the insertion direction position of the sensor part of the second temperature sensor is formed on the outer wall so that the wall part having a wall surface surrounding the side surface of the wiring lead part protrudes from the top part. Is formed.
According to a fifth aspect of the present invention, in the battery power supply device according to the fourth aspect, the concave portion having a temperature sensor through-hole into which the first temperature sensor is inserted at the bottom and a wall surface surrounding the side surface of the wiring lead-out portion. , Formed on the outer wall.
A sixth aspect of the present invention is the battery power supply device according to any one of the first to fifth aspects, further comprising a locking portion that locks the temperature sensor to the outer wall in a state of being inserted into the temperature sensor through hole. It is a thing.
A seventh aspect of the invention is the battery power supply device according to any one of the fourth to sixth aspects, further comprising a highly heat conductive member having elasticity that covers the tip portion of the sensor portion of the first temperature sensor, The sensor part of the first temperature sensor is in contact with the power storage element through a good heat conductive member.
According to an eighth aspect of the present invention, in the battery power supply device according to any one of the fourth to seventh aspects, a cover that shields the tip portion of the sensor portion of the first temperature sensor from the cooling air is provided around the tip portion. It is provided through a gap.
According to a ninth aspect of the present invention, in the battery power supply device according to any one of the first to eighth aspects, the outer wall is provided with a groove in which the wiring led out from the wiring lead-out portion is disposed. Features.

  According to the present invention, the temperature sensor can be securely fixed and the space for fixing can be reduced.

It is an external appearance perspective view of the battery power supply device 1 in the present embodiment. It is a figure which shows the detail of the temperature sensor 4a. It is a figure which shows the attachment structure of temperature sensor 4a, 4b. It is a figure which shows the attachment structure of the temperature sensor 4b in detail. It is a figure which shows the other example of a latching structure. It is a figure which shows the other form regarding a temperature sensor attachment structure. It is a figure explaining the assembly | attachment procedure of a temperature sensor. It is a figure explaining the assembly | attachment procedure of a temperature sensor, and shows the process following the process shown in FIG. It is a figure explaining the assembly | attachment procedure of a temperature sensor, and shows the process following the process shown in FIG. It is a figure which shows the shape of the groove | channel 330, (a) shows a 1st example and (b) shows a 2nd example. It is a block diagram which shows the vehicle drive system carrying the battery power supply device of this Embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 11 is a block diagram showing a vehicle drive system equipped with the battery power supply device of the present embodiment. The drive system shown in FIG. 11 includes a battery module 100, a battery monitoring device 101 that monitors the battery module 100, an inverter device 220 that converts DC power from the battery module 100 into three-phase AC power, and a vehicle driving motor 230. ing. Motor 230 is driven by the three-phase AC power from inverter device 220. The inverter device 220 and the battery monitoring device 101 are connected by CAN communication, and the inverter device 220 functions as a host controller for the battery monitoring device 101. Further, the inverter device 220 operates based on command information from a higher-level vehicle-side controller (not shown).

  The inverter device 220 includes a power module 226, an MCU 222, and a driver circuit 224 for driving the power module 226. The power module 226 converts the DC power supplied from the battery module 100 into three-phase AC power for driving the motor 230. Inverter device 220 operates motor 230 as a generator during vehicle braking. That is, regenerative braking control is performed, and the battery module 100 is charged by regenerating the power generated by the generator operation to the battery module 100.

  Although not shown, a large-capacity smoothing capacitor of about 700 μF to about 2000 μF is provided between the high voltage lines HV + and HV− connected to the power module 226. A battery disconnect unit BDU provided on the high-voltage line HV + is provided with a relay RL, a precharge relay RLP, a resistor RPRE, and a current sensor Si. When the inverter device 220 starts operating, the charge of the smoothing capacitor is substantially zero. When the relay RL is closed, a large initial current flows into the smoothing capacitor, and the relay RL may be fused and damaged. In order to solve this problem, at the start of driving of the motor 230, the precharge relay RLP is changed from the open state to the closed state to charge the smoothing capacitor, and then the relay RL is changed from the open state to the closed state. Supply of power to the apparatus 220 is started. When charging the smoothing capacitor, charging is performed while limiting the maximum current via the resistor RPRE.

  On the other hand, when powering the motor 230, the MCU 222 controls the driver circuit 224 to generate a rotating magnetic field in the advance direction with respect to the rotation of the rotor of the motor 230 in accordance with a command from the host controller. Control the behavior. In this case, DC power is supplied from the battery module 100 to the power module 226.

  The battery module 100 is obtained by connecting two battery power supply devices 1 to be described later in series. Each battery power supply device 1 includes a plurality of single cells connected in series. Hereinafter, the single battery is referred to as a cell. The two battery power supply devices 1 are connected in series via a service disconnect SD for maintenance / inspection in which a switch and a fuse are connected in series. The battery monitoring apparatus 101 mainly performs measurement of each cell voltage, measurement of total voltage, measurement of current, cell temperature and cell capacity adjustment, and the like. For this purpose, IC1 to IC6 as cell controllers are provided. The plurality of cells provided in each battery power supply device 1 are each divided into three cell groups, and one IC is provided for each cell group.

  IC1 to IC6 communicate with the microcomputer 30 in a daisy chain manner via an insulating element (for example, a photocoupler) PH, a communication system 602 for reading cell voltage values and transmitting various commands, and cell overcharge detection information only. And a communication system 604 for transmitting. In the example shown in FIG. 11, the communication system 602 is divided into an upper communication path for IC1 to IC3 of the upper battery power supply device 1 and a lower communication path for IC4 to IC6 of the lower battery power supply device 1. ing. The output of the current sensor Si in the battery disconnect unit BDU is input to the microcomputer 30. Signals relating to the total voltage and temperature of the battery module 100 are also input to the microcomputer 30 and measured by an AD converter (ADC) of the microcomputer 30. The temperature sensor is provided at a plurality of locations in each battery power supply device 1.

  FIG. 1 is an external perspective view of the battery power supply device 1. The battery power supply device constitutes an assembled battery including a plurality of cells 2 of secondary batteries (for example, lithium ion batteries). In the example shown in FIG. 1, the cylindrical cell 2 is used. However, the present invention is not limited to the cylindrical shape, and can be applied to a power supply device using, for example, a rectangular cell. The substantially rectangular parallelepiped housing 3 is composed of five housing members 3a to 3e. In the present embodiment, the housing members 3a to 3e are formed by resin molding. Note that a conductive material can be used for the housing members 3a, 3d, and 3e.

  A cooling air intake 300 is formed on one end surface in the longitudinal direction of the box-shaped housing member 3a in which the cells are accommodated, and a cooling air discharge port 301 is formed on the other end surface. That is, a cooling air passage is formed in the housing member 3a along the longitudinal direction. In the cell arrangement shown in FIG. 1, the cells 2 are arranged in a row in the longitudinal direction of the casing. For example, two cells 2 arranged in series may be arranged in the longitudinal direction. , It may be arranged in two or more upper and lower stages.

  In each cell 2, both end surfaces on which electrodes are formed face the side surfaces of the housing member 3 a (surfaces on which the housing members 3 b and 3 c are fixed) in the housing member 3 a in which the cells are accommodated. Arranged in posture. The plurality of cells 2 are arranged in a line along the cooling air passage in the housing member 3a. In this way, the heat dissipation efficiency of each cell 2 is improved by aligning in the flow direction of the cooling air.

  Housing members 3b and 3c functioning as side plates to which bus bars (not shown) are attached are attached to the side surfaces of the housing member 3a. Each cell 2 is connected by a bus bar. Housing members 3d and 3e are attached to the outside of the housing members 3b and 3c as covers that cover the bus bars of the housing members 3b and 3c so as not to be exposed.

  A temperature sensor 4a for detecting the temperature of the cell 2 and a temperature sensor 4b for detecting the temperature of the cooling air in the cooling passage are fixed to the upper surface of the casing member 3a constituting the outer wall. Although details of the temperature sensors 4a and 4b will be described later, the temperature sensors 4a and 4b are mounted so as to be inserted into the housing from the outside of the housing member 3a and fixed to the upper surface. A temperature detector is provided at the tip of the inserted temperature sensors 4a and 4b. The harnesses 5 of the temperature sensors 4a and 4b are connected to a control device (not shown) that monitors the battery state.

  On the upper surface of the housing member 3a, a groove 330 for winding the harness 5 of the temperature sensors 4a, 4a is formed. In the example shown in FIG. 1, the outer surface of the housing member 3a is recessed as shown in FIG. However, as shown in FIG. 10B, the pair of convex portions 331a. The groove 330 may be formed by erecting 331b on the outer surface of the housing member 3a. In FIG. 1, the groove 330 is formed in the housing member 3 a. However, since the groove 330 is provided according to the shape of the harness 5 that is wound around, the housing members 3 b to 3 e are not limited to the housing member 3 a. Is also formed as appropriate.

  FIG. 2 is a diagram showing details of the temperature sensor 4a (4b). The temperature sensor 4b has the same structure as the temperature sensor 4a. 2A is a front view of the temperature sensor 4a, FIG. 2B is a plan view of the temperature sensor 4a, and FIG. 2C is a cross-sectional view taken along line AA. As shown in FIG. 2A, the temperature sensor 4a has a rod shape and is divided into a front end portion 401, a body portion 402, and a head portion 403. The front end portion 401 and the body portion 402 have a circular cross-sectional shape, but the head portion has a substantially square shape. The outer diameter of the distal end portion 401 is set smaller than the outer diameter of the body portion 402. A plurality of convex portions 404 are formed on the outer peripheral surface on the upper end side of the body portion 402.

  2C, the temperature sensor 4a has a thermistor element 410 housed in a casing 400 in which a hole 405 is formed. The thermistor element 410 is housed in the front end 401 of the casing 400. The harness 5 of the thermistor element 410 passes through the body portion 402 and is pulled out to the side of the head portion 403. The thickness of the casing 400 is thin at the distal end portion 401 and the body portion 402, and the inside of the hole 405 in which the thermistor element 410 is accommodated is filled with a filler 412. The casing 400 preferably has good thermal conductivity, and is formed of an electrically insulating material (for example, PBT (Polybutylene terephthalate)). Also, the filler 412 is preferably a material having good heat conductivity, and for example, an epoxy resin is used.

  FIG. 3 is a view for explaining the mounting structure of the temperature sensors 4a and 4b. 3A is a plan view, and FIG. 3B is a cross-sectional view taken along the line BB. A concave portion 302 and a convex portion 303 are formed on the outer peripheral surface of the casing member 3a as shown in FIG. A through hole 302a for attaching the temperature sensor 4a is formed at the bottom of the concave portion 302, and a through hole 303a for attaching the temperature sensor 4b is formed at the top of the convex portion 303. The diameters of the through holes 302a and 303a are the same, and are set larger than the diameter dimension d1 of the body part 402 shown in FIG. 2A and smaller than the diameter dimension d2 of the convex part 404.

  FIG. 4 is a diagram illustrating a structure for fixing the temperature sensor 4b to the housing member 3a. FIG. 4A is a plan view of a portion of the convex portion 303 provided with the temperature sensor 4b, and FIG. 4B is a cross-sectional view. A wall 303 b is provided on the top of the convex portion 303 so as to surround the side periphery of the head portion 403 of the temperature sensor 4 b attached to the convex portion 303. The wall 303b is formed with a notch 3032 for passing the harness 5 pulled out from the head portion 403.

  The dimension H1 is the height of the wall surface 3034 measured from the outer peripheral surface 3031 of the convex part 303, and in the example shown in FIG. 4, it is set larger than the height dimension H2 of the head part 403 of the temperature sensor 4b. An adhesive 7 is disposed in the gap between the head portion 403 and the wall surface 3034. The adhesive 7 is fixed to the head portion 403 and the wall 303b, and the temperature sensor 4b is fixed to the housing member 3a. The adhesive 7 is provided so as to fill at least a gap between the head portion 403 and the wall surface 3034. In the example shown in FIG. 4, an adhesive is provided so as to cover not only the gap but also the upper surface of the edge of the head portion 403. Note that the adhesive 7 may be provided on the entire top surface of the head portion 403. For the adhesive 7, for example, an epoxy resin adhesive is used.

  When the temperature sensor 4b is attached to the housing member 3a, the temperature sensor 4b is inserted into the through hole 302a from the outside of the housing member 3a, and the temperature sensor is kept until the lower surface of the head portion 403 contacts the surface 3031 of the convex portion 303. 4b is pushed inside the housing. Since the outer diameter d2 of the convex portion 404 of the temperature sensor 4b is set to be slightly larger than the inner diameter of the through hole 302a, one or both of the convex portion 404 and the through hole 302a are deformed by pushing the temperature sensor 4b. The temperature sensor 4b is temporarily fixed to the housing member 3a. And the adhesive agent 7 is inject | poured between the head part 403 and the wall 303b formed so that it might be surrounded.

  In the present embodiment, the wall surface 3034 is formed so as to surround the head portion 403, and the adhesive 7 is injected into the gap formed therebetween, so that the adhesive 7 can be easily injected. The adhesive 7 does not flow out to an excessive place, and a reliable bonding effect can be obtained. Thereby, fixation to the housing member 3a of the temperature sensor 4b can be performed reliably. In addition, since the convex portion 404 is provided as a locking portion for temporarily fixing the temperature sensor 4b to the housing member 3a, the temperature sensor 4b is inserted in the direction of insertion of the adhesive or before the adhesive 7 is solidified. It is possible to fix the temperature sensor 4b at an accurate position where it can be prevented from shifting.

  In addition, by making the height H1 of the wall surface 3034 larger than the height H2 of the sensor unit 403, that is, by causing the top portion 3030 of the wall 303b to protrude from the sensor unit 403, the head at the time of assembling the apparatus or transporting the head. Interference with the unit 403 can be prevented. Of course, the height H1 does not necessarily need to be larger than the height H2, and it is sufficient that the height H1 can be sufficiently bonded to the head portion 403. If the upper surface of the adhesive 7 is higher than the top portion 3030 of the wall 303b, the adhesive 7 may adhere to other members during assembly. Therefore, as shown in FIG. This surface is preferably kept lower than the top 3030. Also from this point, it is preferable to set the height of the wall 303b such that H1> H2.

  On the other hand, in the case of the temperature sensor 4a, the cap 6 made of a good heat conductive elastic material is put on the tip 401 in advance, and then the temperature sensor 4a is inserted into the through hole 302a from the outside of the housing member 3a. The head part 403 is disposed so as to contact the bottom surface of the recess 302, and the height dimension of the head part 403 is set smaller than the depth dimension of the recess 302. Adhesive 7 is injected into the gap between the wall surface (inner peripheral surface) 3024 of the recess 302 and the side periphery of the head portion 403. The adhesive 7 is provided so as to be recessed from the outer wall surface of the housing member 3a. Also in this case, since the wall surface 3024 is formed so as to surround the side periphery of the head portion 403 and the region where the adhesive 7 is injected is limited, the injection operation of the adhesive 7 can be easily performed. Further, the effect of making the height of the wall surface 3024 (that is, the depth of the concave portion 302) higher than the head portion 403 and the effect of making the height of the adhesive 7 lower than the height of the wall surface are the same as in the case of the convex portion 303. is there.

  When the temperature sensor 4a is pushed in and attached to the through hole 302a, the tip 401 contacts the cell 2. Since the cap 6 is attached to the tip portion 401 of the temperature sensor 4a, the tip portion 401 comes into contact with the side surface of the cell case via the cap 6. Although the cap 6 is not necessarily required, the cap 6 formed of an elastic material can be easily deformed, and thus a position error has occurred between the tip 401 and the cell 2 due to an assembly error of the cell 2 or the like. Even in this case, the error can be absorbed by the deformation of the cap 6. In addition, when the battery power supply device 1 is mounted on a vehicle, the relative position between the cell 2 and the tip 401 may slightly change with vehicle vibration. Such a change is also absorbed by the deformation of the cap 6. be able to. As a result, the thermal contact state between the tip 401 and the cell 2 can be kept good. For example, silicon rubber or the like is used as the material of the cap 6.

  3B, the position of the through hole 302a to which the temperature sensor 4a is attached is shifted from the central axis of the cylindrical cell 2 to the leeward side with respect to the flow of the cooling air. By arranging in this way, the tip 401 of the temperature sensor 4a is positioned below the broken line L as shown in FIG. A broken line L is a horizontal line passing through the uppermost part of the side surface of the cell, and a portion below the broken line L enters the shadow (back side) of the cell 2 with respect to the cooling air. Therefore, as shown in FIG. 3B, the influence of the cooling air on the temperature measurement can be reduced by configuring the tip portion 401 to be disposed in this region.

  On the other hand, the temperature sensor 4b described above is provided to detect the temperature in the cooling air passage 304, and is inserted into the housing as the tip 401 reaches the vicinity of the side surface of the cell 2 like the temperature sensor 4a. There is no need. Therefore, by providing the convex portion 303 and adjusting the insertion depth of the temperature sensor 4b into the housing, even if the temperature sensor 4b has the same shape as the temperature sensor 4a, the tip is placed at an appropriate position in the cooling air passage. The part 401 is inserted. Further, it is not necessary to cover the tip portion 401 with the cap 6.

  In the above-described embodiment, the temperature sensors 4a and 4b are locked (temporarily fixed) to the housing member 3a by using a plurality of convex portions 404 around the body portion 402. Not limited to. For example, as shown by the symbol C in FIG. 5, a large-diameter portion 4020 may be provided in the body portion 402, and the large-diameter portion 4020 may be lightly press-fitted into the spot facing portion 3033.

  In the mounting structure shown in FIG. 3, the position error between the tip portion 401 of the temperature sensor 4a and the cell 2 is absorbed by the deformation of the cap 6, but another form having the same function is adopted. As shown in FIG. FIG. 6 is a cross-sectional view similar to that in FIG. 3B, and shows a portion related to the temperature sensor 4a. Compared with the configuration shown in FIG. 3, the temperature sensor 4 a is provided with a heat insulating case 8 filled with a good heat conductive material 9 instead of the cap 6, and the other configuration is the same as the configuration shown in FIG. 3. It is.

  The heat insulating case 8 is formed of a heat insulating member such as EPDM (Ethylene Propylene Methylene Linkage), for example, and is fixed in advance to any of the housing members 3a to 3c. In the example shown in FIG. 6, the heat insulating case 8 is screw-fixed inside the housing member 3 c (inside the housing). The heat insulating case 8 is formed with a hole 800 into which the tip 401 of the temperature sensor 4a is inserted. The heat insulation case 8 is fixed to the housing member 3c so that the center of the hole 800 is located at the position of the tip 401 of the temperature sensor 4a fixed to the housing member 3a. In addition, a surface 801 of the heat insulating case 8 that faces the side surface of the cell 2 forms a curved surface similar to the side surface of the cell 2.

  The hole 800 into which the tip 401 is inserted is filled with the good heat conductive material 9. As a result, even when there is a gap between the tip portion 401 and the cell 2, the good heat conductive material 9 is filled in the gap, so that the heat transfer performance between the tip portion 401 and the cell 2 can be improved. Furthermore, since the good heat conductive material 9 covers the entire tip 401 and is in contact with the side surface of the cell 2, the amount of heat transfer in the path of the cell 2 → the good heat conductive material 9 → the tip 401 increases. In addition, more accurate temperature measurement can be performed.

  Further, by covering the tip portion 401 as a temperature measuring portion with a heat insulating case 8 formed of a heat insulating member, heat dissipation (or heat intrusion) from the tip portion 401 to the cooling air can be reduced, and temperature measurement is performed. The accuracy can be improved. Since the heat insulation case 8 is arranged behind the cell 2 with respect to the flow of the cooling air, the influence of the cooling air can be reduced, and the heat insulation case 8 is obstructed and disturbs the flow of the cooling air. be able to. In addition, also in the case of the front-end | tip part 401 with which the cap 6 as shown in FIG.3 (b) was mounted | worn, by providing the heat insulation case 8 (however, the good heat conductive material 9 is not filled), the influence of a cooling wind similarly Can be reduced.

  7-9 is a figure explaining the assembly | attachment procedure of a temperature sensor. In the step shown in FIG. 7A, the heat insulating case 8 is fixed to the housing member 3c. The housing member 3 c is formed with a cell storage portion that is an opening for storing the cell 2. Next, after fixing the casing members 3b and 3c to the casing member 3a, as shown in FIG. 7B, the cell 2 is stored so that the cell 2 is stored in the cell storage portion 320 of the casing member 3c. Install in the housing 3. Next, as shown in FIG. 8A, the housing members 3d and 3e are attached. Thereafter, the good heat conductive material 9 is filled into the hole 800 of the heat insulating case 8 by using the through hole 302a for attaching the temperature sensor 4a. For example, as shown in FIG. 8B, the good heat conductive material 9 is filled by inserting the injection tube 810 into the housing through the through hole 302 a.

  Thereafter, as shown in FIG. 9, the temperature sensor 4a is inserted into the through hole 302a from the outside of the housing 3 and fixed to the through hole 302a. As a result, the front end 401 is accommodated in the hole 800 of the heat insulating case 8, and the good heat conductive material 9 is interposed between the front end 401 and the cell 2 without a gap.

  As described above, the temperature sensor 4a is inserted and fixed to the plurality of cells 2 arranged in the cooling air passage from the outside of the casing into the sensor fixing through hole 302a formed in the casing wall, and the sensor The tip portion (tip portion 401) of the portion (401 to 403) was brought into thermal contact with the measurement site of the cell 2. Therefore, the sensor can be easily attached without requiring the work of fixing the sensor element portion to the cell surface inside the housing as in the conventional case. Furthermore, the inside of the wiring scooping groove 330 drawn out from the portion (head portion 403) exposed outside the housing of the sensor portion and formed on the outer peripheral surface of the wall portion of the housing 3 (housing portion 3a). In addition, since the sensor wiring (harness 5) is arranged, it is not necessary to run the wiring in the housing as in the conventional case, and the efficiency of the sensor mounting work can be improved.

  Further, by providing a good heat conductive member (good heat conductive material 9 or cap 6) so as to fill a gap between the tip portion (tip portion 401) of the sensor portion and the measurement site of the cell 2, the temperature sensor 4a. The thermal resistance between the measurement site and the measurement site is reduced, and temperature measurement can be performed with high accuracy.

  In particular, the good heat conductive member is the cap 6 that is mounted so as to cover the tip portion (tip portion 401) of the sensor portion, so that the good heat conductive member is connected to the tip portion 401 and the measurement target portion of the cell 2. Can be easily arranged between the two. In addition, since the cap 6 is formed of a highly heat-conductive material having elasticity, even if the gap dimension changes due to assembly error or vibration, the change can be easily followed, and a good thermal contact state can be obtained. Can be maintained.

  Further, by providing a cover (heat insulating case 8) that shields the tip portion (tip portion 401) of the sensor portion from the cooling air through a gap around the tip portion, the influence of the cooling air on temperature measurement can be suppressed. It is possible to improve the temperature measurement accuracy.

  Furthermore, a heat insulating cover (heat insulating case 8) that shields the tip portion (tip portion 401) of the sensor unit and the measurement site of the cell 2 from cooling air is provided, and a gap between the heat insulation cover and the tip portion and the measurement site is provided. By filling the gap filling material (good heat conduction material 9) with good thermal conductivity, the thermal resistance between the sensor 4 and the cell 2 can be reduced, and the influence of cooling air can be suppressed, and high accuracy. Temperature can be measured.

  Furthermore, the formation position of the through-hole 302a in the housing 3 is inserted into a region where the tip of the temperature sensor 4a (tip 401) inserted into the through-hole 302a is shielded from the cooling air by the measurement target cell 2. Is set to Therefore, the influence of cooling air on temperature measurement can be further reduced.

  In addition, the temperature sensor 4 a is disposed in the vicinity of the bottom of a bottomed cylindrical case (casing 400) made of a heat-conductive material with a thermistor (thermistor element 410), and good heat is generated in the gap between the thermistor element 410 and the casing 400. By adopting a configuration filled with a conductive in-case filler (filler 412), the housing 4a can be easily attached to the through hole 302a.

  Furthermore, the present embodiment is applied to a battery power supply device having a configuration in which temperature line sensors 4a and 4b are inserted into the temperature sensor through holes 302a and 303a formed in the housing 3a from the outside of the housing. Each of the temperature sensors 4a and 4b has a sensor portion (a trunk portion 402 and a front end portion 402) inserted into the housing, and a head portion 403 provided with a wiring lead and protruding outward from the outer wall. Then, wall surfaces 3024 and 3034 surrounding the side periphery of the head portion 403 were formed on the outer wall, and an adhesive was provided so as to fill at least the gap between the wall surfaces 3024 and 3034 and the head portion 403.

  As described above, the adhesive 7 is injected into the gap region defined by the wall surfaces 3024 and 3034 and the side periphery of the head portion 403, and the wall surfaces 3024 and 3034 and the side periphery of the head portion 403 are bonded. Therefore, the space for fixing the temperature sensors 4a and 4b can be kept small. Moreover, since it is surrounded by the wall surfaces 3024 and 3034, the adhesive does not spread to unnecessary places, and the workability of the bonding work is excellent.

  In the above-described embodiment, a secondary battery (single cell) such as a lithium ion battery is used as a power storage element. However, the present invention can also be applied to a configuration in which a capacitor cell is used as a power storage element. It is.

  Each of the embodiments described above may be used alone or in combination. This is because the effects of the respective embodiments can be achieved independently or synergistically. In addition, the present invention is not limited to the above embodiment as long as the characteristics of the present invention are not impaired.

1: battery power device, 2: single battery (cell), 3: housing, 3a to 3e: housing member, 4a, 4b: temperature sensor, 5: harness, 6: cap, 7: adhesive, 8: heat insulation Case: 300: Cooling air inlet, 301: Cooling air outlet, 302a, 303a: Through hole, 303b: Wall, 304: Cooling air passage, 330: Groove, 400: Casing, 401: Tip, 402: Body , 403: head portion, 404: convex portion, 412: filler, 3024, 3034: wall surface

Claims (9)

A housing having an outer wall in which a cooling air passage having a cooling air intake port is formed and a plurality of temperature sensor through holes are formed;
A plurality of power storage elements arranged in the cooling air passage;
A plurality of temperature sensors that are inserted from the outside of the housing for each of the plurality of temperature sensor through holes, and have a sensor portion that is inserted into the housing and a wiring lead-out portion that protrudes to the outside from the outer wall, and
A wall surface provided so as to surround a side surface of the wiring lead portion inserted into the temperature sensor through hole is formed on the outer wall, and an adhesive is provided so as to fill at least a gap between the wall surface and the wiring lead portion. A battery power supply device characterized by that. The battery power supply device according to claim 1,
The battery power supply device characterized in that the height of the wall surface is set higher than the height of the wiring lead-out portion. The battery power supply device according to claim 1,
The battery power supply device characterized in that a height of the adhesive provided in a gap between the wall surface and the wiring lead-out portion is set lower than a height of the wall surface. In the battery power supply device according to any one of claims 1 to 3,
The plurality of temperature sensors include a first temperature sensor that detects the temperature of the power storage element when the sensor section is in thermal contact with the power storage element, and the sensor section is disposed in the cooling air passage. A second temperature sensor for detecting the air temperature of the passage,
A convex part for adjusting the insertion direction position of the sensor part of the second temperature sensor is formed on the outer wall, the top part having a through hole for the temperature sensor into which the second temperature sensor is inserted;
A battery power supply device, wherein a wall portion having the wall surface surrounding a side surface of the wiring lead-out portion is formed so as to protrude from the top portion. The battery power supply device according to claim 4,
A battery power supply device having a through hole for the temperature sensor into which the first temperature sensor is inserted in a bottom portion and a recess having the wall surface surrounding a side surface of the wiring lead-out portion formed in the outer wall. . In the battery power supply device according to any one of claims 1 to 5,
A battery power supply device comprising: a locking portion for locking the temperature sensor to the outer wall in a state of being inserted into the temperature sensor through hole. The battery power supply device according to any one of claims 4 to 6,
Comprising a good heat conductive member having elasticity, covering the tip portion of the sensor portion of the first temperature sensor;
The battery power supply device, wherein the sensor part of the first temperature sensor is in contact with the power storage element through the good thermal conductivity member. The battery power supply device according to any one of claims 4 to 7,
A battery power supply device comprising: a cover that shields a tip portion of a sensor portion of the first temperature sensor from cooling air through a gap around the tip portion. The battery power supply device according to any one of claims 1 to 8,
The battery power supply device according to claim 1, wherein a groove in which the wiring drawn out from the wiring drawing portion is disposed is formed in the outer wall.

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