JP6556782B2 - Temperature sensor and battery pack - Google Patents

Description

  The present invention relates to a temperature sensor for measuring the temperature of a cylindrical battery, and a battery pack including a cylindrical battery and a temperature sensor.

  Conventionally, a temperature sensor for measuring the temperature of a battery has been proposed for the purpose of preventing overcharge and overdischarge of a battery mounted on a hybrid vehicle, an electric vehicle, or the like. This type of temperature sensor is generally mounted so as to be in close contact with the surfaces of a plurality of battery cells constituting the battery, and monitors the temperature of the battery cell (see, for example, Patent Document 1).

JP 2011-17638 A

  The above-described conventional temperature sensor has a surface of a metal heat transfer plate (temperature measuring surface) pressed against the surface of a rectangular battery cell and a temperature measuring body (thermistor or the like) provided in the vicinity of the heat transfer plate. ) To measure the temperature of the battery cell. Further, in this conventional temperature sensor, the temperature measuring surface has a planar shape in order to increase the contact area between the surface of the rectangular battery cell and the surface of the heat transfer plate.

  By the way, for various reasons, a battery may be configured by using a cylindrical battery cell (cylindrical battery) instead of the square battery cell. In this case, if the above-described conventional temperature sensor is used as it is, the contact area between the planar temperature measuring surface of the heat transfer plate and the outer peripheral curved surface of the cylindrical battery cell is naturally applied to a rectangular battery cell. Smaller than the contact area at the time. As a result, the conventional temperature sensor may not be able to properly measure the temperature of the cylindrical battery cell.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the temperature sensor which can measure the temperature of a cylindrical battery appropriately, and the battery pack using the temperature sensor. .

In order to achieve the above-described object, the “temperature sensor” according to the present invention is characterized by the following (1) to (4).
(1)
A sensor body having a temperature measuring surface curved to correspond to the shape of the outer peripheral curved surface of the cylindrical battery;
A cantilever-shaped pressing body capable of elastically pressing the sensor body in a first direction in which the temperature measuring surface is brought into contact with the outer peripheral curved surface;
A regulating portion that regulates bending of the pressing body in a direction opposite to a bending direction when the pressing body presses the sensor body in the first direction ,
The sensor body includes a housing that houses a heat transfer body having the temperature measuring surface in part so that the temperature measuring surface is exposed toward an outer peripheral curved surface of the cylindrical battery,
The housing includes a pair of side walls facing the width direction so as to sandwich the heat transfer body in the first direction and a width direction orthogonal to the axial direction of the cylindrical battery,
The side wall is provided with a windbreak wall and the restricting portion so as to protrude outward in the width direction from different positions in the axial direction,
The windbreak wall is provided with a locking portion for locking and fixing the pressing body.
Be a temperature sensor.
(2)
In the temperature sensor according to (1) above,
The regulating part is
Defining a storage chamber for storing the free end of the pressing body, and restricting the pressing body from being bent in a direction opposite to the bending direction by limiting a movable range of the free end to the storage chamber; Configured as
Be a temperature sensor.
(3)
In the temperature sensor according to (1) or (2) above,
The sensor body is
First heat transfer plate which constitutes the temperature measuring surface, and the heat transfer with the second heat transfer plate, a pair of extending to face each other in the width direction from the periphery of the width direction of the first heat transfer plate With heat,
A temperature sensing element disposed so as to be surrounded by the first heat transfer plate and the pair of second heat transfer plates;
An insulator provided between the temperature measuring body and the heat transfer body,
Be a temperature sensor.
(4)
In the temperature sensor according to any one of (1) to (3) above,
The fixed end of the pressing body is fixed to the windbreak wall, and the free end of the pressing body is positioned so as to be engageable with the restricting portion.
Be a temperature sensor.

  According to the temperature sensor having the above configuration (1), the temperature measuring surface of the sensor body has a curved shape corresponding to the shape of the outer peripheral curved surface of the cylindrical battery, and thus has a planar shape like a conventional temperature sensor. Compared with the case of having a temperature measuring surface, the contact area between the temperature measuring surface and the outer peripheral curved surface of the cylindrical battery can be increased. As a result, the temperature sensor of this configuration can appropriately measure the temperature of the cylindrical battery.

  Furthermore, a restricting portion is provided that restricts the cantilever-like pressing body from being bent in a direction opposite to the bending direction in which the elastic force is generated. Therefore, it is possible to prevent the pressing body from being deformed excessively in the direction opposite to the bending direction during transportation of the temperature sensor and during work for attaching the temperature sensor to the cylindrical battery. As a result, since the state in which the elastic force by the pressing body works as designed is maintained, the temperature of the cylindrical battery can be appropriately measured by the temperature sensor.

  Therefore, the temperature sensor of this configuration can appropriately measure the temperature of the cylindrical battery.

  According to the temperature sensor having the configuration (2), it is possible to prevent the pressing body from being bent in the direction opposite to the bending direction that generates the elastic force without requiring a complicated structure. Furthermore, for example, by pressing the center part (the part between the fixed end and the free end) of the cantilever-shaped pressing body against the mating member, an elastic force for pressing the sensor body against the cylindrical battery is generated. Be made. Therefore, the original function as a pressing body is not impaired.

  According to the temperature sensor having the configuration (3), the temperature measuring element is disposed so as to be surrounded by the first heat transfer plate and the second heat transfer plate. Therefore, the heat transmitted from the surface of the cylindrical battery to the temperature measuring surface of the first heat transfer plate can be transmitted from multiple directions so as to enclose the temperature measuring body via the first heat transfer plate and the second heat transfer plate. Therefore, the temperature of the cylindrical battery can be measured more appropriately than when the heat transferred from the cylindrical battery is transmitted from one direction to the temperature measuring body.

  For example, when the temperature measuring surface has a rectangular shape that is long in the axial direction of the cylindrical battery, the pair of second heat transfer plates correspond to both ends of the temperature measuring surface in the circumferential direction of the outer peripheral curved surface (corresponding to the long sides of the rectangle). ) To extend from. Thereby, the temperature measuring body can be wrapped by the first heat transfer plate and the second heat transfer plate, and heat can be efficiently transferred from the heat transfer plate to the temperature measuring body.

  Furthermore, an insulator is provided between the temperature measuring body and the heat transfer body. Therefore, even when a highly conductive material (for example, metal) is used as the heat transfer body, the cylindrical battery and the temperature measuring body can be reliably insulated. Thereby, a failure of the temperature measuring element due to an electrical short circuit between the cylindrical battery and the temperature measuring element can be prevented.

In order to achieve the above-described object, the “battery pack” according to the present invention is characterized by the following ( 5 ) to (6).
( 5 )
A battery pack comprising a cylindrical battery and a temperature sensor,
The temperature sensor is
A sensor body having a temperature measuring surface curved to correspond to the shape of the outer peripheral curved surface of the cylindrical battery;
A cantilever-shaped pressing body capable of elastically pressing the sensor body in a first direction in which the temperature measuring surface is brought into contact with the outer peripheral curved surface;
Have a, a restricting portion that the pressing body in the opposite direction to regulate that curved and the curved direction when said pressing body presses the sensor body in the first direction,
The sensor body includes a housing that houses a heat transfer body having the temperature measuring surface in part so that the temperature measuring surface is exposed toward an outer peripheral curved surface of the cylindrical battery,
The housing includes a pair of side walls facing the width direction so as to sandwich the heat transfer body in the first direction and a width direction orthogonal to the axial direction of the cylindrical battery,
The side wall is provided with a windbreak wall and the restricting portion so as to protrude outward in the width direction from different positions in the axial direction,
The windbreak wall is provided with a locking portion for locking and fixing the pressing body.
It must be a battery pack.
(6)
In the battery pack according to (5) above,
The fixed end of the pressing body is fixed to the windbreak wall, and the free end of the pressing body is positioned so as to be engageable with the restricting portion.
It must be a battery pack.

  According to the battery pack having the configuration (4), the temperature measuring surface of the sensor body has a curved shape corresponding to the shape of the outer peripheral curved surface of the cylindrical battery. Compared with the case of having a temperature measuring surface, the contact area between the temperature measuring surface and the outer peripheral curved surface of the cylindrical battery can be increased. As a result, the temperature sensor of this configuration can appropriately measure the temperature of the cylindrical battery.

  Furthermore, a restricting portion is provided that restricts the cantilever-like pressing body from being bent in a direction opposite to the bending direction in which the elastic force is generated. Therefore, it is possible to prevent the pressing body from being deformed excessively in the direction opposite to the bending direction during transportation of the temperature sensor or during work for attaching the temperature sensor to the cylindrical battery. As a result, since the state in which the elastic force by the pressing body works as designed is maintained, the temperature of the cylindrical battery can be appropriately measured by the temperature sensor.

  Therefore, the temperature sensor of this configuration can appropriately measure and manage the temperature of the cylindrical battery.

  ADVANTAGE OF THE INVENTION According to this invention, the temperature sensor which can measure the temperature of a cylindrical battery appropriately, and a battery pack using the temperature sensor can be provided.

  The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading a form for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings.

FIG. 1 is a perspective view of a temperature sensor according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the temperature sensor. FIG. 3A is a side view of the temperature sensor, and FIG. 3B is an enlarged view of a portion B in FIG. FIG. 4 is a bottom view of the temperature sensor. 5A is a cross-sectional view corresponding to the AA cross section of FIG. 3A in the battery pack according to the embodiment of the present invention, and FIG. 5B is a temperature measurement surface of FIG. 5A. It is the enlarged view which expanded the circumference | surroundings. FIG. 6 is a diagram for explaining the action of the windbreak wall when cooling air is blown onto the cylindrical battery from the outside of the temperature sensor.

<Embodiment>
Hereinafter, with reference to the drawings, “a temperature sensor 1 for measuring the temperature of the cylindrical battery 2” and “a battery pack 3 including the cylindrical battery 2 and the temperature sensor 1” according to an embodiment of the present invention. Will be described.

  As shown in FIGS. 1 to 5, the temperature sensor 1 includes a sensor main body 10, a pressing body 20, a windbreak wall 30, and a restriction portion 40. Hereinafter, for convenience of explanation, as shown in FIG. 1, “front-rear direction”, “up-down direction”, “width direction”, “front”, “rear”, “upper”, and “lower” are defined. The “front-rear direction”, “vertical direction”, and “width direction” are orthogonal to each other. The width direction also corresponds to the “circumferential direction” of the present invention. Hereafter, each member which comprises the temperature sensor 1 is demonstrated in order.

  First, the sensor body 10 will be described. In particular, as shown in FIG. 5A, which is a cross-sectional view corresponding to the AA cross section of FIG. 3A, the sensor body 10 includes a housing 11, a heat transfer body 12, a temperature measuring body 13, Is provided.

  The housing 11 is made of resin and has a rectangular tube shape extending in the front-rear direction as can be understood from FIGS. 2 and 5A. The housing 11 has a front end face that is closed and a rear end face that is open. An electric wire 18 (described later) connected to the temperature measuring element 13 extends from the opening on the rear end surface of the housing 11 (see FIG. 1).

  The heat transfer body 12 is made of a highly conductive material (for example, metal). As can be understood from FIG. 2 and FIG. 5A, the heat transfer body 12 is erected upward from the first heat transfer plate 14 extending in the front-rear direction and the width direction both ends of the first heat transfer plate 14. A pair of second heat transfer plates 15 extending in a flat plate shape in the front-rear direction. The heat transfer body 12 is formed, for example, by bending a single metal plate.

  The lower surface of the first heat transfer plate 14 is a surface that functions as a temperature measuring surface 14 a that is in contact with the outer peripheral curved surface 2 a (see FIG. 5) of the cylindrical battery 2. In order to increase the contact area between the temperature measuring surface 14a and the outer peripheral curved surface 2a of the cylindrical battery 2, the temperature measuring surface 14a of the first heat transfer plate 14 has a cross-sectional shape orthogonal to the front-rear direction (the cross-sectional shape shown in FIG. 5). The arcuate shape is curved upward so as to correspond to the shape of the outer peripheral curved surface 2a. The radius of the circular arc shape is the same value as the radius of curvature of the outer peripheral curved surface 2a of the cylindrical battery 2 or a slightly larger value.

  As understood from FIG. 5A, the heat transfer body 12 is integrated with the housing 11 by insert molding. Specifically, the entire pair of second heat transfer plates 15 are embedded in the pair of side walls of the housing 11 (see FIG. 5A), and the entire first heat transfer plate 14 (measurement). The entire warm surface 14a is exposed directly under the lower wall of the housing 11 (see FIG. 4).

  As shown in FIG. 2, the temperature measuring element 13 is a thermistor element and is sealed with a resin 13a. A pair of lead wires 16 connected to the temperature measuring body 13 are extended at the rear end of the resin-sealed temperature measuring body 13, and the pair of lead wires 16 are respectively connected via caulking parts 17. The conductor portions of the pair of electric wires 18 are connected. The pair of electric wires 18 are connected to a temperature measuring device or a temperature measuring circuit board (not shown).

  The temperature measuring element 13 is inserted from the opening of the rear end surface of the rectangular tube-shaped housing 11, and as shown in FIG. 5A, in the internal space of the housing 11, the first heat transfer plate 14 and a pair of second It arrange | positions so that it may be surrounded by the heat exchanger plate 15. FIG. The internal space of the housing 11 is filled with a potting resin material 19 around the temperature measuring body 13. With the potting resin material 19, the temperature measuring body 13 is fixed and protected in the housing 11.

  Next, the windbreak wall 30 will be described. In this example, the windbreak wall 30 has a function of reducing cooling air blown into the contact portion between the temperature measuring surface 14a and the cylindrical battery 2, and a pressing body 20 (specifically, a cantilever-shaped pressing body 20). A fixed end).

  As shown in FIGS. 1 to 3, the windbreak wall 30 includes a pair of windbreak wall bodies 31. The pair of windbreak wall bodies 31 integrally project outward in the width direction from the position near the front end to the vicinity of the center in the front-rear direction at the lower ends of both side walls of the rectangular tube-shaped housing 11, and in the front-rear direction in a flat plate shape It extends to.

  On the upper surface of the windbreak wall main body 31, there are a locking portion 32 for locking and fixing the pressing body 20, and a stopper portion 33 that abuts the front end surface of the pressing body 20 behind the locking portion 32. Is formed. An insertion hole (through hole penetrating in the front-rear direction) for inserting the pressing body 20 is formed in the locking portion 32.

  Next, the pressing body 20 will be described. The pressing bodies 20 are respectively provided on the pair of windbreak walls 30. The pair of pressing bodies 20 are configured to elastically press the temperature measuring surface 14a of the sensor body 10 downward (that is, the direction in which the temperature measuring surface 14a contacts the outer peripheral curved surface 2a of the cylindrical battery 2). In other words, the pair of pressing bodies 20 has a function of generating downward elastic force.

  The pressing body 20 is composed of a leaf spring. In particular, as shown in FIG. 3, the pressing body 20 includes a first portion 21 that extends forward from one end of the leaf spring, and a second portion that is bent from the front end portion of the first portion 21 and extends obliquely upward and rearward. A portion 22; a third portion 23 bent from the upper end portion of the second portion 22 and extending obliquely downward and rearward; and a bent portion from the lower end portion of the third portion 23 and upward and rearward to the other end of the leaf spring And a fourth portion 24 extending obliquely toward the.

  The first portion 21 is inserted from the front into the insertion hole of the locking portion 32 of the windbreak wall body 31, and the rear end (one end of the leaf spring) is abutted against the stopper portion 33 of the windbreak wall body 31. It is fixed to the wall body 31. The front end portion of the first portion 21 (= the lower end portion of the second portion 22) functions as the fixed end 26 of the pressing body 20.

  Further, the lower end portion of the third portion 23 (= the lower end portion of the fourth portion 24) functions as the free end 27 of the pressing body 20. The upper end portion of the second portion 22 (= the upper end portion of the third portion 23) is located above the upper wall of the housing 11 and is pressed against the pressing wall 50 (see FIG. 5A). It functions as the top 28 of the body 20. Thus, the pressing body 20 has a cantilevered configuration.

  Next, the restriction unit 40 will be described. The restricting portion 40 has a function of limiting the movable range (movable range) of the free end 27 of the pressing body 20. As shown in FIGS. 1 to 3, the restricting portion 40 is a box-shaped portion having an internal space (accommodating chamber), and extends outward in the width direction from the rear end portions of both side walls of the rectangular tube-shaped housing 11. It is provided so as to protrude integrally.

  In particular, as shown in FIG. 3, the front wall 41 of the restricting portion 40 extends obliquely along the extending direction of the third portion 23 of the pressing body 20. The front wall 41 is formed with a window (through hole) 42 that extends in the extending direction of the front wall 41 and communicates with the accommodating chamber of the restricting portion 40. Through this window 42, the fourth portion 24 (including the free end 27) of the pressing body 20 enters and is accommodated in the accommodating chamber of the restricting portion 40.

  In a free state of the pressing body 20 (a state where no elastic restoring force is applied), a pair of top portions 28 are pressed between the free end 27 and the lower wall surface of the window 42 as shown in FIG. A sufficient gap is secured in accordance with the maximum elastic deformation amount of the pressing body 20 that is generated when the pressing body 20 is pressed against the pressing member 20.

  Further, only a slight gap is secured between the free end 27 and the upper wall surface 43 of the window 42 (see FIG. 3B). Thereby, even if an excessive load (see the white arrow in FIG. 3B) acts on the pressing body 20 unintentionally, the free end 27 is applied to the upper wall surface 43 of the window 42. The pressing body 20 is prevented from being excessively deformed upward by abutting and restricting further upward movement. In the free state of the pressing body 20, a gap may not be secured between the free end 27 and the upper wall surface 43 of the window 42 (that is, the free end 27 and the upper wall surface 43 of the window 42 are in contact with each other). May be).

  Further, only a slight gap is secured between the free end 27 and the side walls in the width direction of the window 42. Thereby, even if it is a case where an excessive external force acts on the pressing body 20 in the width direction unintentionally, the pressing body 20 is prevented from being excessively deformed in the width direction.

  Next, the usage state of the temperature sensor 1 having the above configuration will be described. As shown in FIG. 5A, the temperature sensor 1 is configured such that the top portions 28 of the pair of pressing bodies 20 are pressed between the cylindrical batteries 2 and the pressing walls 50 that are disposed so as not to move relative to each other. It is mounted in a state where it is pressed against the (flat plate wall).

  When the temperature sensor 1 is mounted, the pair of pressing bodies 20 are moved such that the free end 27 moves downward (more precisely, moves diagonally downward and rearward) by the reaction force received from the pressing wall 50. It is elastically deformed. As a result, the pair of pressing bodies 20 generate an elastic restoring force that presses the sensor body 10 (temperature measuring surface 14a) downward toward the outer peripheral curved surface 2a of the cylindrical battery 2 via the windbreak wall body 31. Yes. By this elastic restoring force, the close contact state between the temperature measuring surface 14a of the temperature sensor 1 and the outer peripheral curved surface 2a of the cylindrical battery 2 is maintained (see FIG. 5B). Thus, the battery pack 3 is obtained by mounting the temperature sensor 1 on the cylindrical battery 2.

  When the temperature sensor 1 is mounted (the temperature measuring surface 14a of the temperature sensor 1 and the outer peripheral curved surface 2a of the cylindrical battery 2 are in close contact), an amount of heat corresponding to the temperature of the outer peripheral curved surface 2a of the cylindrical battery 2 is generated. The heat transferred to the temperature measuring surface 14 a and transferred to the temperature measuring surface 14 a is transferred to the temperature measuring body 13 via the first heat transfer plate 14 and the pair of second heat transfer plates 15. As a result, the temperature of the outer peripheral curved surface 2a of the cylindrical battery 2 is measured by the temperature measuring device 13 connected to the temperature measuring device or the temperature measuring circuit board.

  Further, when the temperature sensor 1 is mounted, the windbreak wall 30 sandwiches both ends in the width direction of the temperature measuring surface 14 a between the outer peripheral curved surface 2 a of the cylindrical battery 2. For this reason, as shown by a thick black arrow in FIG. 6, for example, cooling air for cooling the cylindrical battery 2 is blown to the cylindrical battery 2 from the outside (for example, the upper side) of the temperature sensor 1. Even with the windbreak wall 30, the cooling air blown into the contact portion between the temperature measuring surface 14a and the cylindrical battery 2 can be reduced. As a result, the accuracy of temperature measurement by the temperature sensor 1 can be improved.

  As described above, according to the temperature sensor 1 and the battery pack 3 according to the embodiment of the present invention, the temperature measuring surface 14 a of the sensor body 10 has a curved shape corresponding to the shape of the outer peripheral curved surface 2 a of the cylindrical battery 2. Compared with the case where the temperature measuring surface has a planar shape as in the conventional temperature sensor, the contact area between the temperature measuring surface 14a and the outer peripheral curved surface 2a of the cylindrical battery 2 is increased, and the temperature of the cylindrical battery 2 is more appropriate. Can be measured.

  Further, a restricting portion 40 is provided that restricts the cantilever-like pressing body 20 from being bent in an opposite direction (upward) to the bending direction in which the elastic force is generated. Therefore, it is possible to prevent the pressing body 20 from being deformed excessively in the direction opposite to the bending direction (upward) during the transportation of the temperature sensor 1 or the operation of attaching the temperature sensor 1 to the cylindrical battery 2. As a result, the state in which the elastic force generated by the pressing body 20 works as designed is maintained, so that the temperature of the cylindrical battery 2 can be appropriately measured by the temperature sensor 1.

  Further, the restricting portion 40 defines a storage chamber for storing the free end 27 of the pressing body 20, and the free end 27 is locked to the wall surface (upper wall surface) 43 of the storage chamber. It is curving to bend (upward). For this reason, it is possible to prevent the pressing body 20 from being bent in the opposite direction (upward) to the bending direction that generates the elastic force without requiring a complicated structure.

  Further, a potting resin material 19 (insulator) is provided between the temperature measuring body 13 and the heat transfer body 12. Therefore, even when a highly conductive material (for example, metal) is used as the heat transfer body 12, the cylindrical battery 2 and the temperature measuring body 13 can be reliably insulated.

<Other aspects>
In addition, this invention is not limited to said each embodiment, A various modification is employable within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like can be made as appropriate. 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, in the above embodiment, the windbreak wall 30 is provided in the temperature sensor 1, but the windbreak wall 30 may not be provided.

  In addition, when providing the windbreak wall 30, it is preferable that the windbreak wall 30 is provided so that the widest possible range of the peripheral part of the temperature measuring surface 14a may be isolated from cooling air. For example, when the temperature measuring surface 14a has a rectangular shape that is long in the axial direction of the cylindrical battery 2, the windbreak wall 30 has both ends of the temperature measuring surface 14a in the circumferential direction of the outer peripheral curved surface (corresponding to the long side of the rectangle). May be arranged so as to be sandwiched between the windbreak wall 30 and the outer peripheral curved surface 2a. Further, for example, the windbreak wall 30 may be disposed so as to sandwich the entire peripheral portion of the temperature measuring surface 14 a between the outer peripheral curved surface of the cylindrical battery 2.

  Furthermore, in the above embodiment, a thermistor is used as the temperature measuring body 13 of the temperature sensor 1. However, as the temperature measuring element 13, a posistor, a thermocouple, a semiconductor element, a bimetal, or the like may be used.

  Furthermore, in the above embodiment, the pair of pressing bodies 20 are provided on both sides in the width direction of the housing 11. For example, even if the single pressing body 20 is provided at the center in the width direction on the upper side of the housing 11. Good. Moreover, in the said embodiment, although the press body 20 is provided in the windbreak wall 30, the press body 20 may be provided in the location different from the windbreak wall 30. FIG.

Here, the characteristics of the temperature sensor 1 and the battery pack 3 according to the present invention described above are summarized and listed in the following (1) to (4), respectively.
(1)
A sensor body (10) having a temperature measuring surface (14a) curved so as to correspond to the shape of the outer peripheral curved surface (2a) of the cylindrical battery (2);
A cantilevered pressing body (20) capable of elastically pressing the sensor body (10) in a direction in which the temperature measuring surface (14a) is brought into contact with the outer peripheral curved surface (2a);
A regulating portion (40) for regulating the bending of the pressing body in a direction opposite to the bending direction when the pressing body (20) presses the sensor body in the direction;
Temperature sensor (1).
(2)
In the temperature sensor according to (1) above,
The regulation part (40)
By defining a storage chamber for storing the free end (27) of the pressing body (20) and restricting the movable range of the free end (27) to the storage chamber, Restricting the bending of the pressing body,
Temperature sensor (1).
(3)
In the temperature sensor according to (1) or (2) above,
The sensor body (10)
A first heat transfer plate (14) constituting the temperature measuring surface (14a) and a pair of second heat transfer plates (15) extending from the peripheral edge of the first heat transfer plate (14) so as to face each other. A heat transfer body (12) having,
A temperature measuring element (13) disposed so as to be surrounded by the first heat transfer plate (14) and the pair of second heat transfer plates (15);
An insulator (19) provided between the temperature measuring body (13) and the heat transfer body (12),
Temperature sensor (1).
(4)
A battery pack (3) comprising a cylindrical battery (2) and a temperature sensor (1),
The temperature sensor (1)
A sensor body (10) having a temperature measuring surface (14a) curved so as to correspond to the shape of the outer peripheral curved surface (2a) of the cylindrical battery (2);
A cantilevered pressing body (20) capable of elastically pressing the sensor body (10) in a direction in which the temperature measuring surface (14a) is brought into contact with the outer peripheral curved surface (2a);
A regulating portion (40) for regulating the bending of the pressing body in a direction opposite to the bending direction when the pressing body (20) presses the sensor body in the direction;
Battery pack (3).

DESCRIPTION OF SYMBOLS 1 Temperature sensor 2 Cylindrical battery 2a Peripheral curved surface 3 Battery pack 10 Sensor main body 12 Heat transfer body 13 Temperature measuring body 14 1st heat transfer plate 14a Temperature measurement surface 15 2nd heat transfer plate 19 Potting resin material (insulator)
20 Press body 27 Free end 30 Windbreak wall 40 Restriction part 43 Upper wall surface

Claims (6)

A sensor body having a temperature measuring surface curved to correspond to the shape of the outer peripheral curved surface of the cylindrical battery;
A cantilever-shaped pressing body capable of elastically pressing the sensor body in a first direction in which the temperature measuring surface is brought into contact with the outer peripheral curved surface;
A regulating portion that regulates bending of the pressing body in a direction opposite to a bending direction when the pressing body presses the sensor body in the first direction ,
The sensor body includes a housing that houses a heat transfer body having the temperature measuring surface in part so that the temperature measuring surface is exposed toward an outer peripheral curved surface of the cylindrical battery,
The housing includes a pair of side walls facing the width direction so as to sandwich the heat transfer body in the first direction and a width direction orthogonal to the axial direction of the cylindrical battery,
The side wall is provided with a windbreak wall and the restricting portion so as to protrude outward in the width direction from different positions in the axial direction,
The windbreak wall is provided with a locking portion for locking and fixing the pressing body.
Temperature sensor. The temperature sensor according to claim 1,
The regulating part is
Defining a storage chamber for storing the free end of the pressing body, and restricting the pressing body from being bent in a direction opposite to the bending direction by limiting a movable range of the free end to the storage chamber; Configured as
Temperature sensor. The temperature sensor according to claim 1 or 2,
The sensor body is
First heat transfer plate which constitutes the temperature measuring surface, and the heat transfer with the second heat transfer plate, a pair of extending to face each other in the width direction from the periphery of the width direction of the first heat transfer plate With heat,
A temperature sensing element disposed so as to be surrounded by the first heat transfer plate and the pair of second heat transfer plates;
An insulator provided between the temperature measuring body and the heat transfer body,
Temperature sensor. In the temperature sensor as described in any one of Claims 1-3,
The fixed end of the pressing body is fixed to the windbreak wall, and the free end of the pressing body is positioned so as to be engageable with the restricting portion.
Temperature sensor. A battery pack comprising a cylindrical battery and a temperature sensor,
The temperature sensor is
A sensor body having a temperature measuring surface curved to correspond to the shape of the outer peripheral curved surface of the cylindrical battery;
A cantilever-shaped pressing body capable of elastically pressing the sensor body in a first direction in which the temperature measuring surface is brought into contact with the outer peripheral curved surface;
Have a, a restricting portion that the pressing body in the opposite direction to regulate that curved and the curved direction when said pressing body presses the sensor body in the first direction,
The sensor body includes a housing that houses a heat transfer body having the temperature measuring surface in part so that the temperature measuring surface is exposed toward an outer peripheral curved surface of the cylindrical battery,
The housing includes a pair of side walls facing the width direction so as to sandwich the heat transfer body in the first direction and a width direction orthogonal to the axial direction of the cylindrical battery,
The side wall is provided with a windbreak wall and the restricting portion so as to protrude outward in the width direction from different positions in the axial direction,
The windbreak wall is provided with a locking portion for locking and fixing the pressing body.
Battery pack. The battery pack according to claim 5,
The fixed end of the pressing body is fixed to the windbreak wall, and the free end of the pressing body is positioned so as to be engageable with the restricting portion.
Battery pack.

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