JP2018181801A - Temperature sensor and battery pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature sensor capable of probably measuring a temperature of a cylindrical type battery.SOLUTION: A temperature sensor 1 comprises a sensor main body 10 having a measurement temperature surface 14a contacted to an outer peripheral curving surface 2a of a cylindrical type battery 2. The measurement temperature surface 14a is curved in accordance with a shape of the outer peripheral curving surface 2a. The temperature sensor 1 comprises: a pressing body 20 which can apply an elastic force to the sensor main body 10 to a direction where the measurement temperature surface 14a is contacted to the outer peripheral curving surface 2a; and a regulation part 40 that regulates that the pressing body 20 is curved to the direction reverse to a curving direction that occurs the elastic force. The regulation part 40 forms a housing chamber that houses a free edge 27 of the pressing body 20, engages the free end 27 to a wall surface 43 of the housing chamber, and regulates the pressing body 20 so as to be curved to the direction reverse to the curving direction.SELECTED DRAWING: Figure 3

Description

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

  BACKGROUND ART Conventionally, a temperature sensor for measuring the temperature of a battery has been proposed for the purpose of preventing overcharging and overdischarging of a battery mounted on a hybrid vehicle, an electric vehicle or the like. A temperature sensor of this type is generally mounted in intimate contact with the surfaces of a plurality of battery cells constituting a battery, and monitors the temperature of the battery cells (see, for example, Patent Document 1).

JP, 2011-17638, A

  The above-mentioned conventional temperature sensor presses and contacts the surface (temperature measurement surface) of a metal heat transfer plate to the surface of a rectangular battery cell, and a temperature sensor (a thermistor or the like provided in the vicinity of the heat transfer plate ) Is configured to measure the temperature of the battery cell. Furthermore, 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, the battery may be configured using a cylindrical battery cell (cylindrical battery) instead of the rectangular battery cell. In this case, if the above-mentioned conventional temperature sensor is used as it is, the contact area between the temperature measuring surface of the heat transfer plate and the outer peripheral curved surface of the cylindrical battery cell is naturally applied to the rectangular battery cell. Small compared to 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.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a temperature sensor capable of properly measuring the temperature of a cylindrical battery, and a battery pack using the temperature sensor. .

In order to achieve the objective mentioned above, the "temperature sensor" concerning the present invention is characterized by following (1)-(3).
(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 main body in a direction in which the temperature measurement surface is in contact with the outer peripheral curved surface;
And a restricting portion that restricts the bending of the pressing body in the direction opposite to the bending direction when the pressing body presses the sensor main body in the direction.
Be a temperature sensor.
(2)
In the temperature sensor according to the above (1),
The regulation unit
A storage chamber for storing the free end of the pressing body is defined, and a movable range of the free end is limited to the storage chamber to restrict the pressing body from bending in the opposite direction to the bending direction. Configured as
Be a temperature sensor.
(3)
In the temperature sensor according to (1) or (2),
The sensor body is
A heat transfer body having a first heat transfer plate constituting the temperature measurement surface, and a pair of second heat transfer plates extending so as to face each other from the peripheral portion of the first heat transfer plate;
A temperature measuring body 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.

  According to the temperature sensor of the configuration of the above (1), since 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, it has a flat shape like a conventional temperature sensor. The contact area between the temperature measuring surface and the outer peripheral curved surface of the cylindrical battery can be increased as compared with the case where the temperature measuring surface is provided. As a result, the temperature sensor of this configuration can properly measure the temperature of the cylindrical battery.

  Furthermore, a restricting portion is provided which restricts the cantilever-like pressing body from being bent in the 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 opposite direction to the bending direction, for example, during transportation of the temperature sensor and during an operation of attaching the temperature sensor to the cylindrical battery. As a result, since the state where the elastic force by the pressing body works as designed is maintained, the temperature of the cylindrical battery can be properly measured by the temperature sensor.

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

  According to the temperature sensor of the configuration of the above (2), it is possible to prevent the pressing body from being bent in the opposite direction to the bending direction which generates the elastic force without requiring a complicated structure. Furthermore, for example, by pressing the central portion (portion between the fixed end and the free end) of the cantilever-like pressing body against the counterpart member, an elastic force is generated to press the sensor body against the cylindrical battery. It is done. Therefore, the original function as a pressing body is not impaired.

  According to the temperature sensor having the configuration of (3), the temperature measuring body 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 measurement surface of the first heat transfer plate can be transmitted from multiple directions so as to wrap 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 properly than in the case where the heat transmitted from the cylindrical battery is transmitted to the temperature measuring body from one direction.

  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 corresponds to both end portions of the temperature measuring surface in the circumferential direction of the outer peripheral curved surface Can be provided to extend from the As a result, the temperature measurement body can be enclosed by the first heat transfer plate and the second heat transfer plate, and heat can be efficiently transmitted from the heat transfer plate to the temperature measurement body.

  Furthermore, an insulator is provided between the temperature measuring body and the heat transfer body. Therefore, even in the case of using a highly conductive material (for example, metal) as the heat transfer body, the cylindrical battery and the temperature measuring body can be reliably insulated. This makes it possible to prevent the failure of the temperature measuring body due to the electrical short circuit between the cylindrical battery and the temperature measuring body.

In order to achieve the objective mentioned above, the "battery pack" concerning the present invention is characterized by following (4).
(4)
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 main body in a direction in which the temperature measurement surface is in contact with the outer peripheral curved surface;
And a restricting portion that restricts the bending of the pressing body in the direction opposite to the bending direction when the pressing body presses the sensor main body in the direction.
Be a battery pack.

  According to the battery pack of the above configuration (4), the temperature measuring surface of the sensor main body has a curved shape corresponding to the shape of the outer peripheral curved surface of the cylindrical battery. The contact area between the temperature measuring surface and the outer peripheral curved surface of the cylindrical battery can be increased as compared with the case where the temperature measuring surface is provided. As a result, the temperature sensor of this configuration can properly measure the temperature of the cylindrical battery.

  Furthermore, a restricting portion is provided which restricts the cantilever-like pressing body from being bent in the 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 opposite direction to the bending direction during transportation of the temperature sensor, work to attach the temperature sensor to the cylindrical battery, or the like. As a result, since the state where the elastic force by the pressing body works as designed is maintained, the temperature of the cylindrical battery can be properly measured by the temperature sensor.

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

  According to the present invention, it is possible to provide a temperature sensor capable of properly measuring the temperature of a cylindrical battery, and a battery pack using the temperature sensor.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the modes for carrying out the invention described below (hereinafter referred to as "embodiments") with reference to the attached 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.3 (a) is a side view of a temperature sensor, FIG.3 (b) is an enlarged view of the B section of Fig.3 (a). FIG. 4 is a bottom view of the temperature sensor. Fig. 5 (a) is a cross-sectional view corresponding to the cross section taken along the line A-A of Fig. 3 (a) in the battery pack according to the embodiment of the present invention; Fig. 5 (b) is a temperature measurement surface in Fig. 5 (a) It is the enlarged view to which the circumference was expanded. FIG. 6 is a view for explaining the operation of the windproof wall in the case where the cooling air is blown to the cylindrical battery from the outside of the temperature sensor.

Embodiment
Hereinafter, the “temperature sensor 1 for measuring the temperature of the cylindrical battery 2” according to the embodiment of the present invention, and the “battery pack 3 including the cylindrical battery 2 and the temperature sensor 1” according to the embodiment of the present invention. Will be explained.

  As shown in FIGS. 1 to 5, the temperature sensor 1 includes a sensor main body 10, a pressing body 20, a windproof wall 30, and a restricting portion 40. Hereinafter, for convenience of explanation, as shown in FIG. 1, “front and rear direction”, “vertical direction”, “width direction”, “front”, “rear”, “upper” and “lower” are defined. The “front-rear direction”, the “vertical direction”, and the “width direction” are orthogonal to each other. The width direction also corresponds to the "circumferential direction" of the present invention. Hereinafter, 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 A-A cross section of FIG. 3A, the sensor main body 10 includes a housing 11, a heat transfer body 12 and a temperature measuring body 13. Equipped with

  The housing 11 is made of resin and, as can be understood from FIGS. 2 and 5A, has a rectangular cylindrical shape extending in the front-rear direction. The housing 11 is closed at its front end face and open at its rear end face. From the opening of the rear end surface of the housing 11, an electric wire 18 described later connected to the temperature measuring body 13 extends (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 both widthwise end portions of the first heat transfer plate 14. And a pair of second heat transfer plates 15 extending in the form of a flat plate 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 measurement 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 (cross-sectional shape shown in FIG. 5) orthogonal to the front and rear direction. It has an arc-like shape curved upward to correspond to the shape of the outer peripheral curved surface 2a. The radius of the arc shape is the same as or slightly larger than the radius of curvature of the outer peripheral curved surface 2 a of the cylindrical battery 2.

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

  As shown in FIG. 2, the temperature detector 13 is a thermistor element and is sealed by a resin 13a. At the rear end of the resin-sealed temperature measuring body 13, a pair of lead wires 16 connected to the temperature measuring body 13 extend, and the pair of lead wires 16 are respectively connected via caulking parts 17 It is connected to the conductor part of a pair of electric wires 18. The pair of electric wires 18 are connected to a temperature measurement device or a temperature measurement circuit board (not shown).

  The temperature measuring body 13 is inserted from the opening of the rear end surface of the rectangular cylindrical housing 11 and, as shown in FIG. 5A, in the internal space of the housing 11, the first heat transfer plate 14 and the pair of second heat transfer plates The heat transfer plate 15 is disposed so as to be surrounded. The potting resin material 19 is filled in the inner space of the housing 11 around the temperature measuring body 13. The temperature measuring body 13 is fixed and protected in the housing 11 by the potting resin material 19.

  Next, the windproof wall 30 will be described. In this example, the windproof wall 30 has a function of reducing the cooling air blown into the contact portion between the temperature measurement surface 14a and the cylindrical battery 2, and the pressing body 20 (specifically, a cantilevered pressing body 20). (Fixed end of) is fixed.

  As shown in FIGS. 1 to 3, the windproof wall 30 includes a pair of windproof wall main bodies 31. The pair of windproof wall main 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 end portions of both side walls of the rectangular cylindrical housing 11 and It extends to

  A locking portion 32 for locking and fixing the pressing body 20 and a stopper portion 33 which abuts the tip surface of the pressing body 20 at the rear of the locking portion 32 are provided on the upper surface of the windproof wall main body 31. It is formed. The locking portion 32 is formed with an insertion hole (a through hole penetrating in the front-rear direction) for inserting the pressing body 20.

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

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

  The first portion 21 is inserted into the insertion hole of the locking portion 32 of the windproof wall main body 31 from the front, and the rear end (one end of the plate spring) abuts against the stopper portion 33 of the windproof wall main body 31 It is fixed to the wall body 31. The front end of the first portion 21 (= the lower end 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 (= the upper end portion of the third portion 23) of the second portion 22 is located above the upper wall of the housing 11 and is pressed against the pressing wall 50 (see FIG. 5A) Acts as the top 28 of the body 20. Thus, the pressing body 20 has a cantilevered configuration.

  Next, the control 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-like portion having an internal space (storage chamber), and extends outward in the width direction from the rear end portions of both side walls of the rectangular cylindrical housing 11. It is provided to project integrally.

  In particular, as shown in FIG. 3, the front wall 41 of the restricting portion 40 obliquely extends 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 extending in the extending direction of the front wall 41 and communicating with the storage chamber of the regulating portion 40. The fourth portion 24 (including the free end 27) of the pressing body 20 enters and is accommodated in the accommodation chamber of the restricting portion 40 via the window 42.

  In the free state of the pressing body 20 (state in which the elastic restoring force is not applied), as shown in FIG. 3, a pair of apexes 28 is pressed between the free end 27 and the lower wall surface of the window 42. A sufficient gap corresponding to the maximum amount of elastic deformation of the pressing body 20 generated when pressed against is secured.

  Further, only a slight gap is secured between the free end 27 and the upper wall 43 of the window 42 (see FIG. 3B). As a result, even when an excessive load (see the white arrow in FIG. 3B) acts on the pressing body 20 unintentionally, the free end 27 does not contact the upper wall 43 of the window 42. By restricting the further upward movement upon contact, the pressing body 20 is prevented from being deformed excessively upward. 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 (ie, the free end 27 and the upper wall surface 43 of the window 42 abut May be

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

  Then, the use condition of the temperature sensor 1 which has the above structure is demonstrated. As shown in FIG. 5A, the temperature sensor 1 presses the top portions 28 of the pair of pressing bodies 20 between the cylindrical battery 2 and the pressing wall 50 which are arranged so as not to move relative to each other. It is mounted in a state where it is pressed against (flat wall).

  In the mounting state of the temperature sensor 1, the reaction force received from the pressing wall 50 causes the pair of pressing members 20 to move downward (more precisely, obliquely downward and backward) by the free end 27. It is elastically deformed. As a result, the pair of pressing members 20 generate an elastic restoring force that presses the sensor main body 10 (temperature measuring surface 14 a) downward toward the outer peripheral curved surface 2 a of the cylindrical battery 2 through the windshield wall main body 31. There is. By this elastic restoring force, the close contact state between the temperature measurement surface 14a of the temperature sensor 1 and the outer peripheral curved surface 2a of the cylindrical battery 2 is maintained (see FIG. 5 (b)). Thus, the battery pack 3 is obtained by attaching the temperature sensor 1 to the cylindrical battery 2.

  In the mounted state of the temperature sensor 1 (the state where 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), the amount of heat corresponding to the temperature of the outer peripheral curved surface 2a of the cylindrical battery 2 is The heat transferred to the temperature measurement surface 14 a and transferred to the temperature measurement surface 14 a is transferred to the temperature measurement 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 2 a of the cylindrical battery 2 is measured by the temperature measurement device 13 connected to the temperature measurement device or the temperature measurement circuit board.

  Further, in the mounted state of the temperature sensor 1, the windproof wall 30 sandwiches both widthwise end portions of the temperature measurement surface 14 a with the outer peripheral curved surface 2 a of the cylindrical battery 2. Therefore, as indicated by thick black arrows in FIG. 6, for example, the 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 in this case, the windproof wall 30 can reduce the cooling air blown into the contact portion between the temperature measurement surface 14 a and the cylindrical battery 2. 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 measurement 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 The contact area between the temperature measuring surface 14a and the outer peripheral curved surface 2a of the cylindrical battery 2 is increased as compared with the case where the temperature measuring surface has a planar shape as in the conventional temperature sensor, and the temperature of the cylindrical battery 2 is more appropriate Can be measured.

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

  Furthermore, 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, whereby the direction of curvature is opposite. It regulates that it curves (upward). For this reason, without requiring a complicated structure, it is possible to prevent the pressing body 20 from being bent in the opposite direction (upward) to the bending direction that causes the elastic force.

  Furthermore, 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>
The present invention is not limited to the above embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the embodiments described above, and appropriate modifications, improvements, etc. are possible. In addition, the material, shape, size, number, arrangement location, and the like of each component in the embodiment described above are arbitrary and not limited as long as the present invention can be achieved.

  For example, in the above embodiment, the temperature sensor 1 is provided with the windproof wall 30. However, the windproof wall 30 may not be provided.

  When the windproof wall 30 is provided, the windproof wall 30 is preferably provided so as to isolate the largest possible area of the peripheral portion of the temperature measurement surface 14a from the 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 windproof wall 30 is 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) Can be disposed so as to be sandwiched between the windproof wall 30 and the outer peripheral curved surface 2a. Furthermore, for example, the windproof wall 30 may be disposed so as to sandwich the entire peripheral portion of the temperature measurement surface 14 a with the outer peripheral curved surface of the cylindrical battery 2.

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

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

Here, the features of the temperature sensor 1 and the battery pack 3 according to the present invention described above will be briefly summarized and listed in the following (1) to (4), respectively.
(1)
A sensor body (10) having a temperature measuring surface (14a) curved to correspond to the shape of the outer peripheral curved surface (2a) of the cylindrical battery (2);
A cantilever-shaped pressing body (20) capable of elastically pressing the sensor main body (10) in a direction in which the temperature measurement surface (14a) is brought into contact with the outer peripheral curved surface (2a);
And a restricting portion (40) for restricting the bending of the pressing body in the direction opposite to the bending direction when the pressing body (20) presses the sensor main body in the direction.
Temperature sensor (1).
(2)
In the temperature sensor according to the above (1),
The regulation unit (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, the direction opposite to the bending direction is reversed. Regulating bending of the pressing body,
Temperature sensor (1).
(3)
In the temperature sensor according to (1) or (2),
The sensor body (10) is
A first heat transfer plate (14) constituting the temperature measurement surface (14a), and a pair of second heat transfer plates (15) extending so as to face each other from the peripheral portion of the first heat transfer plate (14) A heat transfer body (12) having
A temperature measuring body (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) is
A sensor body (10) having a temperature measuring surface (14a) curved to correspond to the shape of the outer peripheral curved surface (2a) of the cylindrical battery (2);
A cantilever-shaped pressing body (20) capable of elastically pressing the sensor main body (10) in a direction in which the temperature measurement surface (14a) is brought into contact with the outer peripheral curved surface (2a);
A restricting portion (40) for restricting the bending of the pressing body in the direction opposite to the bending direction when the pressing body (20) presses the sensor main body in the direction;
Battery pack (3).

Reference Signs List 1 temperature sensor 2 cylindrical battery 2a outer peripheral curved surface 3 battery pack 10 sensor main body 12 heat transfer body 13 temperature measuring body 14 first heat transfer plate 14a temperature measurement surface 15 second heat transfer plate 19 potting resin material (insulator)
20 pressing body 27 free end 30 windproof wall 40 regulating portion 43 upper wall surface

Claims (4)

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 main body in a direction in which the temperature measurement surface is in contact with the outer peripheral curved surface;
And a restricting portion that restricts the bending of the pressing body in the direction opposite to the bending direction when the pressing body presses the sensor main body in the direction.
Temperature sensor. In the temperature sensor according to claim 1,
The regulation unit
A storage chamber for storing the free end of the pressing body is defined, and a movable range of the free end is limited to the storage chamber to restrict the pressing body from bending in the opposite direction to the bending direction. Configured as
Temperature sensor. In the temperature sensor according to claim 1 or 2,
The sensor body is
A heat transfer body having a first heat transfer plate constituting the temperature measurement surface, and a pair of second heat transfer plates extending so as to face each other from the peripheral portion of the first heat transfer plate;
A temperature measuring body 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. 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 main body in a direction in which the temperature measurement surface is in contact with the outer peripheral curved surface;
And a restricting portion that restricts the bending of the pressing body in the direction opposite to the bending direction when the pressing body presses the sensor main body in the direction.
Battery pack.

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