JP5703458B2 - Assembly structure of temperature sensor in power supply - Google Patents

Description

  The present invention relates to an assembly structure of a temperature sensor in a power supply device, comprising: a battery assembly in which a plurality of battery cells are assembled; a module component that connects battery cells in series; and a temperature sensor that measures the temperature of the battery cell. It is about.

  For example, a battery (power supply device) mounted on a hybrid vehicle or an electric vehicle is mounted in the form of a battery assembly in which a plurality of battery cells are assembled. The plurality of battery cells are electrically connected in series with a bus bar provided in the module component in order to increase the output voltage of the battery. In addition, a temperature sensor that measures the temperature of the battery cell is assembled in a power supply device including this type of battery assembly and module parts in order to prevent overcharging and overdischarging of the battery cell.

  5 and 6 are diagrams showing a conventional temperature sensor mounting structure described in Patent Document 1. FIG.

  In FIG. 5, the battery assembly 100 includes a plurality of battery cells 101 arranged in a row, and a case 105 and a band 106 that hold the plurality of battery cells 101. Positive and negative terminals 102a and 102b are provided. The module component 110 includes a module main body 111 made of a plate-like insulating material and a plurality of bus bars 112 to 114. By mounting the module component 110 on the battery assembly 100, a plurality of battery cells are formed by the bus bars 112 to 114. 101 can be electrically connected in series.

  The temperature sensor 120 is mounted in a sensor mounting hole 115 formed in the module main body 111. When the module component 110 is mounted on the battery assembly 100 as shown in FIG. It has the temperature measuring part 121 which contacts, and the elastic arm 122 provided on the upper side of the temperature measuring part 121. A pressing wall 116 is provided on the inner periphery of the sensor mounting hole 115 to press the elastic arm 122 toward the battery cell 101, thereby causing the temperature measuring unit 121 to be in close contact with the upper surface 101 a of the battery cell 101.

  In this temperature sensor assembly structure, the temperature sensor 120 can be assembled to the battery cell 101 by assembling the temperature sensor 120 in advance to the module component 110 and then mounting the module component 110 to the battery assembly 100.

JP 2009-176601 A

  By the way, in the assembly structure of the conventional temperature sensor described in Patent Document 1, there is a problem that it is difficult to assemble the temperature sensor 120 at an appropriate position on the battery cell 101 due to backlash between the module component 110 and the temperature sensor 120. there were. Further, since the conventional temperature sensor 120 measures the temperature of the surface of the battery cell 101, there is a problem that it is easily affected by the ambient temperature and a measurement error is large.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to stably assemble the temperature sensor to the battery cell, and to prevent the influence of the ambient temperature, and to accurately detect the temperature of the battery. It is an object to provide an assembly structure of a temperature sensor capable of measuring the temperature.

The above object of the present invention can be achieved by the following constitution.
(1) A battery assembly in which a plurality of battery cells are assembled, a module part that is connected to the battery assembly to connect the plurality of battery cells in series, and a plurality of battery cells that form the battery assembly A temperature sensor for measuring the temperature of at least one of the battery cells, and an assembly structure of the temperature sensor in the power supply device comprising:
A temperature measuring hole is provided in the battery cell to be measured for temperature by the temperature sensor,
The temperature sensor is provided with a rod-shaped temperature measuring part to be inserted into the temperature measuring hole, and the sensor head exposed to the outside of the temperature measuring hole when the temperature measuring part is inserted into the temperature measuring hole, An elastic arm extending along the peripheral wall of the opening of the temperature measuring hole is provided,
With the temperature measuring part of the temperature sensor inserted into the temperature measuring hole, the module part is mounted on the battery assembly, so that the elastic arm is pressed toward the battery cell by the pressing wall of the module part. Thus, the temperature sensor assembly structure for a power supply device, wherein the temperature sensor is fixed to a battery cell.

  (2) When the elastic arm is pressed by the pressing wall of the module part, the first contact part that presses and contacts the pressing wall of the module part and the peripheral wall of the opening of the temperature measuring hole of the battery cell are pressed and contacted. And a second contact portion that can be elastically deformed so that a distance in the direction of the pressing force between the first contact portion and the second contact portion changes when a pressing force is applied by the pressing wall. The temperature sensor is fixed to the battery cell by the elastic arm being sandwiched between the pressing wall of the module part and the peripheral wall of the opening of the temperature measuring hole of the battery cell. The assembly structure of the temperature sensor in the power supply device according to (1) above.

  (3) When the elastic arm is pressed by the pressing wall of the module component, the elastic arm has a first contact portion that presses and contacts the pressing wall of the module component. 1. The temperature sensor assembly structure according to (1) or (2) above, wherein a rib for preventing positional displacement of one contact portion is provided.

(4) A temperature sensor assembly method for assembling a temperature sensor to a battery cell using the temperature sensor assembly structure described in (1) above,
Insert the temperature measuring part of the temperature sensor into the temperature measuring hole on the battery assembly side,
With the temperature measuring part of the temperature sensor inserted into the temperature measuring hole, the module part is mounted on the battery assembly, so that the elastic arm is pressed toward the battery cell by the pressing wall of the module part. Thereby fixing the temperature sensor to the battery cell;
A method of assembling the temperature sensor.

  According to the assembly structure of the above configuration (1), the temperature sensor of the temperature sensor is inserted into the temperature measuring hole formed in the battery cell in advance, and the module component is mounted on the battery assembly in that state, thereby The elastic arm is pressed to the battery cell side by the presser wall of the parts, and the temperature sensor is fixed to the battery cell, so that the temperature sensor can be assembled stably and securely without backlash and is easy to assemble. Therefore, the work efficiency can be improved. Moreover, since the temperature measuring part of the temperature sensor is inserted into the temperature measuring hole to measure the temperature, it is difficult to be influenced by the ambient temperature, and the internal temperature of the battery cell can be measured with high accuracy.

  According to the assembly structure of the above configuration (2), the temperature sensor is fixed to the battery cell by sandwiching the elastic arm between the module part and the battery cell. It can be stably fixed to the battery cell.

  According to the assembly structure of the configuration (3) above, the ribs are provided on the pressing wall of the module component, so that it is possible to prevent the temperature sensor from being displaced at the time of assembly and after assembly.

  According to the assembling method of the above configuration (4), the temperature measuring part of the temperature sensor is inserted into the temperature measuring hole formed in the battery cell in advance, and the module component is attached to the battery assembly in that state, thereby The elastic arm is pressed to the battery cell side by the presser wall of the part, and thereby the temperature sensor is fixed to the battery cell, so that the temperature sensor can be assembled stably and reliably without rattling, and the assembly is simple. The work efficiency can be improved. Moreover, since the temperature measuring part of the temperature sensor is inserted into the temperature measuring hole to measure the temperature, it is difficult to be influenced by the ambient temperature, and the internal temperature of the battery cell can be measured with high accuracy.

  According to the present invention, it is possible to stably and reliably assemble the temperature sensor to the battery cell without backlash, and the assembly is simple and the working efficiency can be improved. Moreover, since the temperature measuring part of the temperature sensor is inserted into the temperature measuring hole to measure the temperature, it is difficult to be influenced by the ambient temperature, and the internal temperature of the battery cell can be measured with high accuracy.

(A) is sectional drawing which shows the structure of the module components in embodiment of this invention, (b) is a perspective view which shows the structure of a temperature sensor. It is a perspective view which shows the state which assembled | attached the temperature sensor to each battery cell of the battery assembly in embodiment of this invention. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. (A) is principal part sectional drawing which shows the state which assembled | attached the temperature sensor to the said battery cell, (b) is sectional drawing which shows the state which fixed the temperature sensor by attaching a module component to a battery assembly on it. It is. It is a disassembled perspective view of the assembly structure of the conventional temperature sensor. It is a waist cross-sectional view of the conventional assembly structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a cross-sectional view showing the configuration of module parts in the embodiment, FIG. 1B is a perspective view showing the configuration of the temperature sensor, and FIG. 2 shows the temperature sensor assembled to each battery cell of the battery assembly in the embodiment. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2, FIG. 4 (a) is a cross-sectional view of the main part showing a state where the temperature sensor is assembled to the battery cell, and FIG. It is sectional drawing which shows the state which fixed the temperature sensor by mounting | wearing a battery assembly with components.

  As shown in FIG. 2, the assembly structure of the temperature sensor of the present embodiment includes a battery assembly 2 in which a plurality of battery cells 1 are arranged in a line, and FIGS. 1 (a) and 4 (b). As shown in FIG. 4, a module component 20 that connects a plurality of battery cells 1 in series by being attached to the battery assembly 2, and a plurality of battery cells that constitute the battery assembly 2 as shown in FIGS. 1 is applied to a power supply device that includes a temperature sensor 10 that measures the temperature of each of the temperature sensors 10.

  As shown in FIG. 3, a temperature measuring hole 3 is provided in the battery cell 1 whose temperature is measured by the temperature sensor 10. Further, as shown in FIGS. 1B and 3, the temperature sensor 10 has a rod-shaped temperature measuring unit 11 inserted into the temperature measuring hole 3 on the tip side (lower end side in the figure), and a temperature measuring hole. An elastic arm 13 extending along the peripheral wall (upper wall surface of the battery cell 1) of the opening of the temperature measuring hole 3 is attached to the sensor head 12 exposed to the outside of the temperature measuring hole 3 when the temperature measuring unit 11 is inserted into 3. Have. A pair of elastic arms 13 are provided at positions facing each other by 180 degrees. A terminal 14 projects from the upper surface of the sensor head 12.

  As shown in FIG. 1A, the module component 20 includes a module main body 21 made of a plate-like insulating material, and a bus bar (not shown) held by the module main body 21, and the module component 20 is attached to the battery assembly 2. By mounting, a plurality of battery cells 1 can be electrically connected in series by a bus bar. The module body 21 is provided with a sensor mounting hole 22, and a pressing wall 23 that presses the pair of elastic arms 13 of the temperature sensor 10 toward the battery cell 1 is provided on the inner periphery of the sensor mounting hole 22. . Further, on the lower surface of the module main body 21, a guide protrusion 27 that performs a guide function when the module component 20 is mounted on the battery assembly 2, and a lock portion 26 that locks the module component 20 to the battery assembly 2 in the mounted state. Is provided.

  4A and 4B, when the elastic arm 13 of the temperature sensor 10 is pressed by the pressing wall 23 of the module component 20, the first contact is brought into press contact with the pressing wall 23 of the module component 20. And a second contact portion 13b that press-contacts with a peripheral wall (upper wall surface 1a) of the opening of the temperature measuring hole 3 of the battery cell 1. The elastic arm 13 is formed in a reverse cross-sectional shape, the arm tip is configured as the first contact portion 13a, the arm bent portion is configured as the second contact portion 13b, and the pressing force by the pressing wall 23 When is operated, the elastic deformation is possible so that the distance in the pressing force acting direction between the first contact portion 13a and the second contact portion 13b changes.

  Then, with the temperature measuring part 11 of the temperature sensor 10 inserted in the temperature measuring hole 3, the elastic arm 13 is attached to the battery cell 1 by the press wall 23 of the module part 20 by attaching the module part 20 to the battery assembly 2. And the temperature sensor 10 is fixed to the battery cell 1. That is, the temperature sensor 10 is fixed to the battery cell 1 by the elastic arm 13 being sandwiched between the holding wall 23 of the module component 20 and the peripheral wall (upper wall surface 1 a) of the opening of the temperature measuring hole 3 of the battery cell 1. Has been. A rib 23a protrudes from the tip of the holding wall 23 of the module component 20, and the first contact portion 13a is prevented from being displaced by the rib 23a.

  When producing this temperature sensor assembly structure, first, as shown in FIGS. 2, 3, and 4 (a), the temperature measuring hole 3 in which the temperature measuring unit 11 of the temperature sensor 10 is formed in the battery cell 1. Insert into. Next, as shown in FIG. 4B, the module component 20 is mounted on the battery assembly 2 in this state. When the module component 20 is mounted, the module component 20 is attached to an appropriate position of the battery assembly 2 while being positioned by the guide 27 and locked by the lock portion 26.

  By doing so, the elastic arm 13 can be pressed to the battery cell 1 side by the holding wall 23 of the module component 20, whereby the elastic arm 13 can be sandwiched between the module component 20 and the battery cell 1, The temperature sensor 10 can be fixed to the battery cell 1. In this state, the measurement signal can be taken out by connecting an electric wire to the terminal 14 projecting from the sensor head 12.

  Thus, according to the assembly structure of the temperature sensor 10 of the present embodiment, the temperature measuring part 11 of the temperature sensor 10 is inserted into the temperature measuring hole 3 formed in the battery cell 1 in advance, and the module component 20 is mounted in that state. By mounting on the battery assembly 2, the elastic arm 13 is pressed toward the battery cell 1 by the pressing wall 23 of the module component 20, and thereby the temperature sensor 10 is fixed to the battery cell 1. Can be assembled stably and reliably without any shakiness, and the assembly is simple and the working efficiency can be improved. Further, since the temperature measuring unit 11 of the temperature sensor 10 is inserted into the temperature measuring hole 3 and the temperature is measured, the temperature of the battery cell 1 can be accurately measured without being affected by the ambient temperature.

  Further, since the temperature sensor 10 is fixed to the battery cell 1 by sandwiching the elastic arm 13 between the module component 20 and the battery cell 1, the temperature sensor 10 can be stably stabilized without applying an excessive force. Can be fixed to. Moreover, since the rib 23a is provided in the pressing wall 23 of the module component 20, the position shift of the temperature sensor 10 at the time of assembly and after assembly can be prevented.

  Moreover, since the guide 27 is provided in the module component 20, the assembly of the module component 20 to the battery assembly 2 can be performed easily and appropriately.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, although the case where the temperature sensor 10 was assembled | attached to all the battery cells 1 was shown in the said embodiment, you may assemble | attach the temperature sensor 10 only to the specific battery cell 1. FIG.

1 Battery cell 1a Upper wall surface (peripheral wall of temperature measurement hole opening)
DESCRIPTION OF SYMBOLS 2 Battery assembly 3 Temperature measuring hole 10 Temperature sensor 11 Temperature measuring part 12 Sensor head 13 Elastic arm 13a 1st contact part 13b 2nd contact part 20 Module component 23 Pressing wall 23a Rib

Claims (4)

A battery assembly in which a plurality of battery cells are aggregated, a module part that is connected to the battery assembly to connect the plurality of battery cells in series, and a plurality of battery cells that constitute the battery assembly A temperature sensor for measuring the temperature of at least one battery cell, and an assembly structure of the temperature sensor in the power supply device comprising:
A temperature measuring hole is provided in the battery cell to be measured for temperature by the temperature sensor,
The temperature sensor is provided with a rod-shaped temperature measuring part to be inserted into the temperature measuring hole, and the sensor head exposed to the outside of the temperature measuring hole when the temperature measuring part is inserted into the temperature measuring hole, An elastic arm extending along the peripheral wall of the opening of the temperature measuring hole is provided,
With the temperature measuring part of the temperature sensor inserted into the temperature measuring hole, the module part is mounted on the battery assembly, so that the elastic arm is pressed toward the battery cell by the pressing wall of the module part. Thus, the temperature sensor assembly structure for a power supply device, wherein the temperature sensor is fixed to a battery cell.   When the elastic arm is pressed by the pressing wall of the module component, the first contact portion that press-contacts the pressing wall of the module component and the second wall that press-contacts the peripheral wall of the opening of the temperature measuring hole of the battery cell. And having a contact portion, and is elastically deformable so that the distance in the pressing force acting direction between the first contact portion and the second contact portion changes when the pressing force by the pressing wall is applied. The temperature sensor is fixed to the battery cell by sandwiching the elastic arm between a pressing wall of the module component and a peripheral wall of an opening of a temperature measuring hole of the battery cell. The assembly structure of the temperature sensor in the power supply device according to 1.   When the elastic arm is pressed by the pressing wall of the module part, the elastic arm has a first contact part that presses and contacts the pressing wall of the module part, and the pressing part wall of the module part has the first contact part. 3. A temperature sensor assembling structure in a power supply device according to claim 1, wherein a rib for preventing the positional deviation of the power supply device is provided so as to protrude. A temperature sensor assembly method for assembling a temperature sensor to a battery cell using the temperature sensor assembly structure according to claim 1,
Insert the temperature measuring part of the temperature sensor into the temperature measuring hole on the battery assembly side,
With the temperature measuring part of the temperature sensor inserted into the temperature measuring hole, the module part is mounted on the battery assembly, so that the elastic arm is pressed toward the battery cell by the pressing wall of the module part. Thereby fixing the temperature sensor to the battery cell;
A method of assembling the temperature sensor.

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