CN109029753B - Temperature sensor and battery pack - Google Patents
Temperature sensor and battery pack Download PDFInfo
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- CN109029753B CN109029753B CN201810509641.8A CN201810509641A CN109029753B CN 109029753 B CN109029753 B CN 109029753B CN 201810509641 A CN201810509641 A CN 201810509641A CN 109029753 B CN109029753 B CN 109029753B
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- heat transfer
- temperature measuring
- temperature
- pair
- cylindrical battery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The purpose of the present invention is to provide a temperature sensor capable of appropriately measuring the temperature of a cylindrical battery. A temperature sensor (1) comprises: a heat conductor (12) having a temperature measuring surface (14a) curved in accordance with the shape of the outer peripheral curved surface of the cylindrical battery (2); a temperature measuring body (13) capable of measuring the temperature of a temperature measuring point which changes due to the heat transferred from the temperature measuring surface via the heat transfer body; a support (51) which is an insulating support provided between the heat transfer body and the temperature measuring body, and supports the temperature measuring body so as to avoid contact between the heat transfer body and the temperature measuring body and to provide a gap between the heat transfer body and the temperature measuring body; and an insulator (61) provided to fill the gap and in contact with the heat transfer body and the temperature measurement body.
Description
Technical Field
The present invention relates to a temperature sensor for measuring the temperature of a cylindrical battery, and a battery pack including the cylindrical battery and the temperature sensor.
Background
Conventionally, a temperature sensor for measuring a temperature of a battery mounted in a hybrid vehicle, an electric vehicle, or the like has been proposed for the purpose of preventing overcharge, overdischarge, or the like of the battery. Such a temperature sensor is generally attached to a surface of a plurality of battery cells constituting a battery in close contact therewith to monitor the temperature of the battery cells (see, for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2011-17638
Disclosure of Invention
Problems to be solved by the invention
The conventional temperature sensor described above is configured such that: the surface (temperature measuring surface) of the metal heat transfer plate is pressed against the surface of the rectangular battery cell, and the temperature of the battery cell is measured by a temperature measuring element (thermistor or the like) provided in the vicinity of the heat transfer plate. Further, in the 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.
However, for various reasons, a battery may be configured using a cylindrical battery cell (cylindrical battery) instead of a rectangular battery cell. In this case, if the conventional temperature sensor is used as it is, the contact area between the temperature measurement surface of the planar shape of the heat transfer plate and the outer peripheral curved surface of the cylindrical battery cell is naturally smaller than that when applied to the prismatic battery cell. 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 problems, and an object thereof is to provide a temperature sensor capable of appropriately measuring the temperature of a cylindrical battery, and a battery pack using the temperature sensor.
Means for solving the problems
In order to achieve the above object, the "temperature sensor" according to the present invention is characterized by the following (1) to (3).
(1) The temperature sensor includes: a heat conductor having a temperature measuring surface curved in accordance with the shape of the outer peripheral curved surface of the cylindrical battery;
a temperature measuring body capable of measuring a temperature of a temperature measuring point that changes due to heat transferred from the temperature measuring surface via the heat transfer body;
a support member that is an insulating support member provided between the heat transfer member and the temperature measuring member, and supports the temperature measuring member so as to avoid contact between the heat transfer member and the temperature measuring member and to provide a gap between the heat transfer member and the temperature measuring member;
and an insulator disposed to fill the gap and to be in contact with the heat transfer body and the temperature measurement body.
(2) In the temperature sensor according to the above (1),
the insulator has at least one of the following characteristics:
a property superior to the support in thermal conductivity, and a property superior to the adhesion with the heat transfer body in adhesion.
In the temperature sensor according to the above (1) or (2),
the heat transfer body has:
a 1 st heat transfer plate constituting the temperature measuring surface and a pair of 2 nd heat transfer plates extending from a pair of peripheral edges of the 1 st heat transfer plate so as to face each other;
the temperature measuring body has a temperature measuring element and a sealing member that seals the temperature measuring element so as to surround the temperature measuring element, and is disposed so as to be surrounded by the 1 st heat transfer plate and the pair of 2 nd heat transfer plates,
the support bodies are disposed at 4 positions on the pair of peripheral edges of the 1 st heat transfer plate and the pair of ends of the pair of 2 nd heat transfer plates, and support the sealing members so as to surround them.
According to the temperature sensor having the configuration of the above (1), since the temperature measuring surface of the heat transfer body has a shape curved in accordance with 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 is increased as compared with the case of the conventional temperature sensor having a flat temperature measuring surface. This enables the temperature of the cylindrical battery to be appropriately measured.
Further, the heat transfer body and the temperature measuring body are isolated from each other by an insulating support body, and a gap between the heat transfer body and the temperature measuring body is filled up by an insulator. Therefore, even when a material having high conductivity (for example, metal) is used as the heat transfer member, the cylindrical battery and the temperature measuring element can be reliably insulated from each other. This prevents the temperature measuring element from malfunctioning due to an electrical short circuit between the cylindrical battery and the temperature measuring element.
In addition, heat is transferred from the heat transfer body to the temperature measuring body via a gap (strictly speaking, an insulator filling the gap in contact with both) between the heat transfer body and the temperature measuring body. Therefore, for example, compared to a case where the support member is provided so as to cover the entire heat transfer body and the insulator is filled between the support member and the temperature measuring body, heat is easily and reliably transferred from the heat transfer body to the temperature measuring body. Thereby, the temperature of the cylindrical battery is further appropriately measured.
Therefore, the temperature sensor of the present configuration can appropriately measure the temperature of the cylindrical battery.
According to the temperature sensor configured in the above (2), since the insulator has at least one of the 2 characteristics, the temperature of the cylindrical battery can be measured more appropriately. Specifically, when the insulator has a property of thermal conductivity (the former property), heat is more easily and reliably transferred from the heat transfer body to the temperature measuring body than when the support body is provided so as to cover the entire heat transfer body and the insulator is filled between the support body and the temperature measuring body. In the case where the insulator has a characteristic of adhesiveness (the latter characteristic), the insulator can be prevented from being separated from the support together with the temperature measuring body, as compared with the case where the support is provided so as to cover the entire heat transfer body, and the insulator is filled between the support and the temperature measuring body. Therefore, the temperature of the cylindrical battery is more appropriately measured.
In the temperature sensor having the structure described in the above (3), the temperature measuring body is disposed so as to be surrounded by the 1 st heat transfer plate and the 2 nd heat transfer plate. Therefore, the heat transferred from the surface of the cylindrical battery to the temperature measurement surface of the 1 st heat transfer plate can be transferred from a plurality of directions via the 1 st heat transfer plate and the 2 nd heat transfer plate so as to wrap the temperature measuring element. Therefore, the temperature of the cylindrical battery can be measured more appropriately than in the case where the heat transferred from the cylindrical battery is transferred to the temperature measuring body from one direction. Further, the support body supports the temperature measuring element (strictly speaking, the sealing member covering the temperature measuring element) at 4 positions, and thus the temperature measuring element can be reliably held at the designed position.
For example, when the temperature measurement surface has a long rectangular shape in the axial direction of the cylindrical battery, the pair of 2 nd heat transfer plates are provided so as to extend from both ends (corresponding to the long sides of the rectangle) of the temperature measurement surface in the circumferential direction of the outer peripheral curved surface. Thus, the temperature measuring body can be covered with the 1 st heat transfer plate and the 2 nd heat transfer plate, and heat can be efficiently transferred from the heat transfer plates to the temperature measuring body.
In order to achieve the above object, the "battery pack" according to the present invention is characterized by the following (4).
(4) A battery pack includes a cylindrical battery and a temperature sensor,
the temperature sensor includes:
a heat conductor having a temperature measuring surface curved in accordance with the shape of the outer peripheral curved surface of the cylindrical battery;
a temperature measuring body capable of measuring a temperature of a temperature measuring point that changes due to heat transferred from the temperature measuring surface via the heat transfer body;
a support member that is an insulating support member provided between the heat transfer member and the temperature measuring member, and supports the temperature measuring member so as to avoid contact between the heat transfer member and the temperature measuring member and to provide a gap between the heat transfer member and the temperature measuring member; and
an insulator disposed to fill the gap and to contact the heat transfer body and the temperature measurement body.
According to the assembled battery having the configuration of the above (4), since the temperature measuring surface of the sensor body has a shape curved in accordance with 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 is increased as compared with the case of having a flat temperature measuring surface as in the conventional temperature sensor. As a result, the temperature sensor of the present configuration can appropriately measure the temperature of the cylindrical battery.
Further, the heat transfer body and the temperature measuring body are isolated from each other by an insulating support body, and a gap between the heat transfer body and the temperature measuring body is filled with an insulator. Therefore, even when a material having high conductivity (for example, metal) is used as the heat transfer member, the cylindrical battery and the temperature measuring element can be reliably insulated from each other. This prevents the temperature measuring element from malfunctioning due to an electrical short circuit between the cylindrical battery and the temperature measuring element.
In addition, heat is transferred from the heat transfer body to the temperature measuring body via a gap (strictly speaking, an insulator filling the gap in contact with both) between the heat transfer body and the temperature measuring body. Therefore, for example, compared to a case where the support member is provided so as to cover the entire heat transfer body and the insulator is further filled between the support member and the temperature measuring body, heat is easily and reliably transferred from the heat transfer body to the temperature measuring body. Thereby, the temperature of the cylindrical battery is further appropriately measured.
Therefore, the assembled battery of the present configuration can appropriately measure and manage the temperature of the cylindrical battery.
Effects of the invention
According to the present invention, it is possible to provide a temperature sensor capable of appropriately measuring the temperature of a cylindrical battery and a battery pack using the temperature sensor.
The present invention has been described briefly above. Further, the details of the present invention will be further clarified by reading the mode for carrying out the invention described below (hereinafter referred to as "embodiment") with reference to the drawings.
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 is a side view of the temperature sensor, and fig. 3B is an enlarged view of a portion B of fig. 3.
Fig. 4 is a bottom view of the temperature sensor.
Fig. 5 is a sectional view of the battery pack according to the embodiment of the present invention, taken along the line a-a in fig. 3, and fig. 5b is an enlarged view of the vicinity of the temperature measuring surface in fig. 5.
Description of the reference numerals
1: temperature sensor
2: cylindrical battery
2 a: peripheral curved surface
3: battery pack
10: sensor body
12: heat transfer body
13: temperature measuring body
14: no. 1 heat transfer plate
14 a: temperature measuring surface
15: no. 2 heat transfer plate
19: sealing member
20: pressing body
27: free end
30: wind-proof wall
40: restricting part
43: upper wall surface
51: supporting member (supporting body)
61: pouring resin material (insulator)
Detailed Description
< embodiment >
Hereinafter, a description will be given of "the temperature sensor 1 for measuring the temperature of the cylindrical battery 2" and "the assembled battery 3 including the cylindrical battery 2 and the temperature sensor 1" according to the embodiment of the present invention, with reference to the drawings.
As shown in fig. 1 to 5b, the temperature sensor 1 includes: sensor body 10, pressing body 20, wind-proof wall 30, regulating portion 40, and support portion 50. Hereinafter, for convenience of explanation, as shown in fig. 1, "front-rear direction", "up-down direction", "width direction", "front", "rear", "up", and "down" are defined. The "front-rear direction", "up-down direction", and "width direction" are orthogonal to each other. The width direction corresponds to the "circumferential direction" of the present invention. The components constituting the temperature sensor 1 will be described in order below.
First, the sensor body 10 will be explained. In particular, as shown in fig. 5, which corresponds to a cross-sectional view of section a-a of fig. 3, the sensor body 10 includes: a shell 11, a heat transfer body 12 and a temperature measuring body 13. Further, a triangular-prism-shaped support member 51 made of an insulating material such as resin is provided as the support portion 50 in the sensor body 10.
The housing 11 is made of resin, and as is apparent from fig. 2 and 5, has a rectangular tubular shape extending in the front-rear direction. The front end face of the housing 11 is closed and the rear end face is opened. A later-described electric wire 18 connected to the temperature measuring body 13 extends from an opening in the rear end surface of the housing 11 (see fig. 1).
The heat transfer body 12 is made of a material (e.g., metal) having high electrical conductivity. As is apparent from fig. 2 and 5, the heat transfer body 12 includes a 1 st heat transfer plate 14 extending in the front-rear direction and a pair of 2 nd heat transfer plates 15 that are provided upright above from both width-direction end portions of the 1 st heat transfer plate 14 and extend in the front-rear direction in a flat plate shape. The heat transfer body 12 is formed by bending a sheet of metal, for example.
The lower surface of the 1 st heat transfer plate 14 functions as a temperature measurement surface 14a that abuts against the outer peripheral curved surface 2a (see fig. 5 and 5b) of the cylindrical battery 2. In order to increase the contact area between the temperature measurement surface 14a and the outer peripheral curved surface 2a of the cylindrical battery 2, the temperature measurement surface 14a of the 1 st heat transfer plate 14 has an arc-like shape in which a cross-sectional shape (cross-sectional shape shown in fig. 5 and 5b) perpendicular to the front-rear direction is curved upward so as to correspond to the shape of the outer peripheral curved surface 2 a. The radius of the arc-like shape is equal to or slightly larger than the curvature radius of the outer peripheral curved surface 2a of the cylindrical battery 2.
As can be seen from fig. 5, the heat transfer body 12 is injection molded and integrated with the casing 11. Specifically, the pair of 2 nd heat transfer plates 15 are embedded inside the pair of side walls of the casing 11 (see fig. 5), and the entire 1 st heat transfer plate 14 (the entire temperature measurement surface 14a) is exposed to the right lower surface of the lower wall of the casing 11 (see fig. 4). Further, the support members 51 are arranged at four positions in the vicinity of both ends in the width direction of the 1 st heat transfer plate 14 and in the vicinity of the upper end of the 2 nd heat transfer plate 15. The support member 51 is fixed to the 1 st heat transfer plate 14 and the 2 nd heat transfer plate 15 by, for example, an adhesive.
As shown in fig. 2, the temperature measuring body 13 is a thermistor, and is sealed with a resin 13 a. A pair of lead wires 16 connected to the temperature measuring body 13 extend from the rear end of the resin-sealed temperature measuring body 13, and the pair of lead wires 16 are connected to conductor portions of a pair of electric wires 18 via rivet members 17, respectively. The pair of wires 18 are connected to a temperature measuring device or a temperature measuring circuit board (not shown). Further, the resin-sealed temperature measuring body 13, the pair of lead wires 16, the caulking member 17, and a part of the pair of lead wires 18 are sealed by a sealing member 19 for insulating the temperature measuring body 13 from the surroundings. The sealing member 19 may be made of a resin material having a higher viscosity than the potting resin material 61 described later, for example, in consideration of workability of a process of sealing the temperature measuring body 13 and the like.
The temperature measuring body 13 covered with the sealing member 19 is inserted from an opening in the rear end surface of the angular cylindrical casing 11, and is disposed in the internal space of the casing 11 so as to be surrounded by the 1 st heat transfer plate 14 and the pair of 2 nd heat transfer plates 15 while being supported by the support member 51 as shown in fig. 5. Here, the temperature measuring element 13 is arranged at a predetermined temperature measuring point of a temperature change by heat transferred from the temperature measuring surface 14a through the heat transfer element 12 (the 1 st heat transfer plate 14 and the 2 nd heat transfer plate 15), and measures the temperature at the temperature measuring point.
Further, the support member 51 supports the temperature measuring body 13 so as to avoid contact between the heat transfer body 12 (the 1 st heat transfer plate 14 and the 2 nd heat transfer plate 15) and the temperature measuring body 13 and to provide a gap between the heat transfer body 12 and the temperature measuring body 13. More specifically, the support member 51 is supported by the seal member 19 surrounding the temperature measuring body 13. Further, an insulating potting resin material 61 is filled in a gap between the heat transfer body 12 and the sealing member 19 surrounding the temperature measuring body 13. The potting resin material 61 is in contact with the heat transfer body 12, the sealing member 19 surrounding the temperature measuring body 13. The temperature measuring body 13 is fixed and protected within the housing 11 by the potting resin material 61.
The potting resin material 61 is made of a resin material having a lower viscosity than the material constituting the sealing member 19, for example, in order to fill the gap as free as possible. Furthermore, the potting resin material 61 is made of a resin material having excellent adhesion to the heat transfer body 12 from the viewpoint of fixing the temperature measuring body 13 as firmly as possible. In addition, the potting resin material 61 is made of a resin material having excellent thermal conductivity in order to transfer heat from the heat transfer element 12 to the temperature measuring element 13 as efficiently as possible. Specifically, the potting resin material 61 is made of a material in which an epoxy resin and a metal filler are mixed.
Here, if the potting resin material 61 is superior to the sealing member 19 in thermal conductivity, heat is easily and reliably transferred from the heat transfer body 12 to the temperature measuring body 13, as compared with a case where the support member 51 is covered so as to cover the entire heat transfer body 12 and further, the potting resin material 61 is filled between the support member 51 and the temperature measuring body 13. Further, as another example, if the adhesion of the potting resin material 61 to the heat transfer body 12 is better than the adhesion to the support member 51 in terms of adhesion, the potting resin material 61 can be prevented from separating from the support member 51 for each temperature measuring body 13, as compared with the case where the support member 51 is provided so as to cover the entire heat transfer body 12 and the potting resin material 61 is filled between the support member 51 and the temperature measuring body 13. Preferably, the potting resin material 61 has at least one of the above-described thermal conductivity property and adhesion property. This enables the temperature of the cylindrical battery 2 to be measured more appropriately.
Next, the wind-break wall 30 will be explained. In this example, the wind-shielding wall 30 has a function of reducing the cooling wind blowing to the contact position between the temperature measuring surface 14a and the cylindrical battery 2, and a function of fixing the pressing body 20 (specifically, the fixed end of the cantilever-shaped pressing body 20).
As shown in fig. 1 to 3b, the wind-break wall 30 includes a pair of wind-break wall main bodies 31. The pair of wind-proof wall bodies 31 integrally protrude outward in the width direction from the position near the front end to the position near the center in the front-rear direction at the lower end portions of both side walls of the square tubular housing 11, and extend in the front-rear direction in a flat plate shape.
On the upper surface of the wind-break wall body 31, a locking portion 32 for locking and fixing the pressing body 20 and a stopper portion 33 for making the end surface of the pressing body 20 abut on the rear portion of the locking portion 32 are formed. An insertion hole (a 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 explained. The pressing bodies 20 are provided on the pair of wind-proof walls 30, respectively. The pair of pressing bodies 20 elastically press the temperature measuring surface 14a of the sensor body 10 downward (i.e., in a direction of contact with 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 a downward elastic force.
The pressing body 20 is formed of a plate spring. As shown in fig. 3 and 3b, the pressing body 20 includes: a 1 st part 21 extending forward from one end of the plate spring; a 2 nd part 22 bent from the front end of the 1 st part 21 and extending obliquely upward and rearward; a 3 rd portion 23 bent from an upper end of the 2 nd portion 22 and extending obliquely downward and rearward; and a 4 th part 24 bent from the lower end of the 3 rd part 23 and extending obliquely upward and rearward to the other end of the leaf spring.
The 1 st segment 21 is inserted into an insertion hole of the locking portion 32 of the wind-break wall body 31 from the front, and is fixed to the wind-break wall body 31 in a state where a rear end (one end of the leaf spring) is in contact with the stopper portion 33 of the wind-break wall body 31. The tip of the 1 st segment 21 (i.e., the lower end of the 2 nd segment 22) functions as a fixed end 26 of the pressing body 20.
The lower end of the 3 rd segment 23 (i.e., the lower end of the 4 th segment 24) functions as the free end 27 of the pressing body 20. The upper end of the 2 nd segment 22 (i.e., the upper end of the 3 rd segment 23) is located above the upper wall of the housing 11 and functions as the top 28 of the pressing body 20 pressed against the pressing wall 70 (see fig. 5). In this manner, the pressing body 20 has a cantilever-like structure.
Next, the restricting unit 40 will be explained. The restricting portion 40 has a function of restricting a movable range (movable range) of the free end 27 of the pressing body 20. As shown in fig. 1 to 3b, the regulating portion 40 is a box-shaped portion having an internal space (housing chamber), and is provided so as to integrally protrude outward in the width direction from rear end portions of both side walls of the angular cylindrical housing 11.
In particular, as shown in fig. 3 and 3b, the front wall 41 of the regulating portion 40 extends obliquely so as to extend along the extending direction of the 3 rd 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 housing chamber of the regulating portion 40. The 4 th part 24 (including the free end 27) of the pressing body 20 enters the housing chamber of the regulating portion 40 through the window 42 and is housed.
In the free state (state in which no elastic restoring force is exerted) of the pressing body 20, as shown in fig. 3 and 3b, a sufficient gap corresponding to the maximum elastic deformation amount of the pressing body 20 generated when the pair of top portions 28 are pressed against the pressing wall 70 is secured between the free end 27 and the lower wall surface of the window 42.
In addition, only a small gap is ensured between the free end 27 and the upper wall surface 43 (see fig. 3b) of the window 42. Thus, even when an excessive load (see the white arrow in fig. 3b) is unintentionally applied upward to the pressing body 20, the free end 27 abuts against the upper wall surface 43 of the window 42 and further upward movement is restricted, so that excessive upward deformation of the pressing body 20 is prevented. In the free state of the pressing body 20, a gap may not be ensured between the free end 27 and the upper wall surface 43 of the window 42 (that is, the free end 27 may abut against the upper wall surface 43 of the window 42).
In addition, only a small clearance is secured between the free end 27 and both widthwise side wall surfaces of the window 42. Thus, even when an excessive external force is unintentionally applied to the pressing body 20 in the width direction, the pressing body 20 can be prevented from being excessively deformed in the width direction.
Next, a use state of the temperature sensor 1 having the above-described configuration will be described. As shown in fig. 5, the temperature sensor 1 is mounted between the cylindrical battery 2 and the pressing wall 70, which are arranged so as to be immovable relative to each other, in a state in which the top portions 28 of the pair of pressing bodies 20 are pressed against the pressing wall 70 (flat plate wall).
In the mounted state of the temperature sensor 1, the pair of pressing bodies 20 are elastically deformed by the reaction force from the pressing wall 70, and the free ends 27 are moved downward (more precisely, moved obliquely downward and rearward). As a result, the pair of pressing bodies 20 generate an elastic restoring force that presses the sensor body 10 (temperature measurement surface 14a) downward toward the outer peripheral curved surface 2a of the cylindrical battery 2 via the wind-proof wall body 31. The elastic restoring force maintains 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 (see fig. 5 b). Then, the temperature sensor 1 is attached to the cylindrical battery 2, thereby obtaining the assembled battery 3.
In the mounted state of the temperature sensor 1 (the state in which the temperature measurement surface 14a of the temperature sensor 1 is in close contact with the outer peripheral curved surface 2a of the cylindrical battery 2), heat of an amount corresponding to the temperature of the outer peripheral curved surface 2a of the cylindrical battery 2 is transmitted to the temperature measurement surface 14a, and the heat transmitted to the temperature measurement surface 14a is transmitted to the temperature measuring element 13 via the 1 st heat transfer plate 14 and the pair of 2 nd 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 element 13 connected to the temperature measuring device or the temperature measuring circuit board.
As described above, according to the temperature sensor 1 and the battery pack 3 according to the embodiment of the present invention, since the temperature measurement surface 14a of the sensor body 10 has a curved shape corresponding to the shape of the outer peripheral curved surface 2a of the cylindrical battery 2, the contact area between the temperature measurement surface 14a and the outer peripheral curved surface 2a of the cylindrical battery 2 is increased as compared with the case where the temperature measurement surface has a flat shape as in the conventional temperature sensor, and the temperature of the cylindrical battery 2 can be measured more appropriately.
Further, the heat transfer element 12 and the temperature measuring element 13 are isolated from each other by the insulating support member 51, and a gap between the heat transfer element 12 and the temperature measuring element 13 is filled with a potting resin material 61. Therefore, even when a material having high conductivity (for example, metal) is used as the heat conductor 12, the cylindrical battery 2 and the temperature measuring element 13 can be reliably insulated from each other. This prevents the temperature measuring element 13 from being electrically short-circuited with the cylindrical battery 2, thereby preventing a failure of the temperature measuring element.
In addition, heat is transferred from the heat transfer body 12 to the temperature measuring body 13 via a space between the heat transfer body 12 and the temperature measuring body 13 (strictly speaking, the potting resin material 61 filling the space so as to be in contact with both). Therefore, for example, as compared with the case where the support 51 is provided so as to cover the entire heat transfer body 12 and the potting resin material 61 is filled between the support member 51 and the temperature measuring body 13, heat is easily and reliably transferred from the heat transfer body 12 to the temperature measuring body 13. This enables the temperature of the cylindrical battery 2 to be measured more appropriately.
< other embodiment >
The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the present invention is not limited to the above embodiments, and can be appropriately modified and improved. The material, shape, size, number, arrangement position, and the like of each component of the above embodiments may be any component that can complete the present invention, and are not limited.
For example, in the above embodiment, a thermistor is used as the temperature measuring body 13 of the temperature sensor 1. However, a ptc (positive Temperature coefficient) thermistor, a thermocouple, a semiconductor element, a bimetal, or the like may be used as the Temperature measuring element 13.
Here, the characteristics of the temperature sensor 1 and the battery pack 3 according to the present invention are briefly summarized and listed as the following (1) to (4).
(1) The temperature sensor includes:
a heat conductor (12) having a temperature measuring surface (14a) curved in accordance with the shape of the outer peripheral curved surface of the cylindrical battery (2);
a temperature measuring body (13) capable of measuring the temperature of a temperature measuring point that changes due to the heat transferred from the temperature measuring surface (14a) via the heat transfer body (12);
a support (51) which is an insulating support (51) provided between the heat transfer body (12) and the temperature measurement body (13), and supports the temperature measurement body (51) so as to avoid contact between the heat transfer body and the temperature measurement body and to provide a gap between the heat transfer body and the temperature measurement body; and
an insulator (61) disposed to fill the gap and to contact the heat transfer body and the temperature measurement body.
(2) In the temperature sensor according to the above (1),
the insulator (61) has at least one of the following properties: a property superior to the support (51) in thermal conductivity, and a property superior to the heat transfer body (12) in adhesiveness to the support (51).
(3) In the temperature sensor according to the above (1) or (2),
the heat transfer body (12) has: a 1 st heat transfer plate (14) constituting the temperature measuring surface and a pair of 2 nd heat transfer plates (15) extending from a pair of peripheral edges of the 1 st heat transfer plate so as to face each other;
the temperature measuring body (13) has a temperature measuring element (13) and a sealing member (19), and is disposed so as to be surrounded by the 1 st heat transfer plate (14) and the pair of 2 nd heat transfer plates (15), wherein the sealing member (19) seals the temperature measuring element (13) so as to surround the temperature measuring element (13);
the support bodies (51) are disposed at 4 positions on the pair of peripheral edges of the 1 st heat transfer plate (14) and the pair of ends of the pair of 2 nd heat transfer plates (15), and support the sealing members (19) so as to be surrounded thereby.
(4) A battery pack (3) includes a cylindrical battery (2) and a temperature sensor (1),
the temperature sensor (1) has:
a heat conductor (12) having a temperature measuring surface (14a) curved in accordance with the shape of the outer peripheral curved surface of the cylindrical battery (2);
a temperature measuring body (13) capable of measuring the temperature of a temperature measuring point that changes due to the heat transferred from the temperature measuring surface (14a) via the heat transfer body (12);
a support (51) which is an insulating support (51) provided between the heat transfer body (12) and the temperature measurement body (13) and supports the temperature measurement body so as to avoid contact between the heat transfer body and the temperature measurement body and to provide a gap between the heat transfer body and the temperature measurement body; and
an insulator (61) disposed to fill the gap and to contact the heat transfer body and the temperature measurement body.
Claims (3)
1. A temperature sensor, comprising:
a heat conductor having a temperature measuring surface curved in accordance with the shape of the outer peripheral curved surface of the cylindrical battery;
a temperature measuring body capable of measuring a temperature of a temperature measuring point that changes due to heat transferred from the temperature measuring surface via the heat transfer body;
a support member that is an insulating support member provided between the heat transfer member and the temperature measuring member, and supports the temperature measuring member so as to avoid contact between the heat transfer member and the temperature measuring member and to provide a gap between the heat transfer member and the temperature measuring member; and
an insulator arranged to fill the gap and to contact the heat transfer body and the temperature measuring body,
the heat transfer body has: a 1 st heat transfer plate constituting the temperature measuring surface and a pair of 2 nd heat transfer plates extending from a pair of peripheral edges of the 1 st heat transfer plate so as to face each other,
the temperature measuring body has a temperature measuring element and a sealing member that seals so as to surround the temperature measuring element, and is disposed so as to be surrounded by the 1 st heat transfer plate and the pair of 2 nd heat transfer plates, and the support bodies are each triangular prism-shaped, are disposed at 4 positions on the pair of peripheral portions of the 1 st heat transfer plate and the pair of end portions of the pair of 2 nd heat transfer plates, and support the support bodies so as to surround the sealing member.
2. The temperature sensor of claim 1,
the insulator has at least one of the following characteristics:
a property superior to the support in thermal conductivity, and a property superior to the adhesion with the heat transfer body in adhesion.
3. A battery pack includes a cylindrical battery and a temperature sensor,
the temperature sensor includes:
a heat conductor having a temperature measuring surface curved in accordance with the shape of the outer peripheral curved surface of the cylindrical battery;
a temperature measuring body capable of measuring a temperature of a temperature measuring point that changes due to heat transferred from the temperature measuring surface via the heat transfer body;
a support member that is an insulating support member provided between the heat transfer member and the temperature measuring member, and supports the temperature measuring member so as to avoid contact between the heat transfer member and the temperature measuring member and to provide a gap between the heat transfer member and the temperature measuring member; and
an insulator arranged to fill the gap and to contact the heat transfer body and the temperature measuring body,
the heat transfer body has: a 1 st heat transfer plate constituting the temperature measuring surface and a pair of 2 nd heat transfer plates extending from a pair of peripheral edges of the 1 st heat transfer plate so as to face each other,
the temperature measuring body has a temperature measuring element and a sealing member that seals so as to surround the temperature measuring element, and is disposed so as to be surrounded by the 1 st heat transfer plate and the pair of 2 nd heat transfer plates, and the support bodies are each triangular prism-shaped, are disposed at 4 positions on the pair of peripheral portions of the 1 st heat transfer plate and the pair of end portions of the pair of 2 nd heat transfer plates, and support the support bodies so as to surround the sealing member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017103022A JP6559181B2 (en) | 2017-05-24 | 2017-05-24 | Temperature sensor and battery pack |
| JP2017-103022 | 2017-05-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109029753A CN109029753A (en) | 2018-12-18 |
| CN109029753B true CN109029753B (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810509641.8A Active CN109029753B (en) | 2017-05-24 | 2018-05-24 | Temperature sensor and battery pack |
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| JP (1) | JP6559181B2 (en) |
| CN (1) | CN109029753B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210012554A (en) * | 2019-07-25 | 2021-02-03 | 삼성에스디아이 주식회사 | Battery pack |
| CN111430827A (en) * | 2020-03-19 | 2020-07-17 | 安捷利（番禺）电子实业有限公司 | Battery core temperature acquisition device, busbar and battery core |
| CN114061774B (en) * | 2020-11-16 | 2022-10-28 | 中国科学院理化技术研究所 | Assembly structure of low-temperature sensor, low-temperature detection device and assembly method thereof |
| KR102648672B1 (en) * | 2021-12-28 | 2024-03-15 | 엘에스일렉트릭(주) | Sensor apparatus |
| CN116106750B (en) * | 2023-01-28 | 2023-11-10 | 上海玫克生储能科技有限公司 | Battery temperature measuring point identification and abnormality detection method and device and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1591964A (en) * | 2003-08-29 | 2005-03-09 | 三洋电机株式会社 | Battery charger |
| JP2011017638A (en) * | 2009-07-09 | 2011-01-27 | Yazaki Corp | Temperature sensor |
| CN101995298A (en) * | 2009-08-23 | 2011-03-30 | 三菱综合材料株式会社 | Temperature sensor |
| CN105092065A (en) * | 2015-07-16 | 2015-11-25 | 兰州空间技术物理研究所 | Temperature measurement apparatus of ion thruster at high-temperature, high-voltage and plasma environment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6111622Y2 (en) * | 1980-11-25 | 1986-04-12 | ||
| JPS6072535U (en) * | 1983-10-24 | 1985-05-22 | 株式会社東芝 | temperature sensor structure |
| US5454641A (en) * | 1994-01-13 | 1995-10-03 | Ranco Incorporated Of Delaware | Temperature transducer assembly |
| JPH08219904A (en) * | 1995-02-20 | 1996-08-30 | Matsushita Electric Ind Co Ltd | Thermistor type surface temperature sensor |
| JP2002199609A (en) * | 2000-12-25 | 2002-07-12 | Sanyo Electric Co Ltd | Charger |
-
2017
- 2017-05-24 JP JP2017103022A patent/JP6559181B2/en active Active
-
2018
- 2018-05-24 CN CN201810509641.8A patent/CN109029753B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1591964A (en) * | 2003-08-29 | 2005-03-09 | 三洋电机株式会社 | Battery charger |
| JP2011017638A (en) * | 2009-07-09 | 2011-01-27 | Yazaki Corp | Temperature sensor |
| CN101995298A (en) * | 2009-08-23 | 2011-03-30 | 三菱综合材料株式会社 | Temperature sensor |
| CN105092065A (en) * | 2015-07-16 | 2015-11-25 | 兰州空间技术物理研究所 | Temperature measurement apparatus of ion thruster at high-temperature, high-voltage and plasma environment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6559181B2 (en) | 2019-08-14 |
| JP2018197723A (en) | 2018-12-13 |
| CN109029753A (en) | 2018-12-18 |
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