阅读说明：本技术 温度传感器的安装结构 (Mounting structure of temperature sensor ) 是由 田中开 于 2019-07-18 设计创作，主要内容包括：本发明的温度传感器的安装结构包括：温度传感器,其安装于单电池,用于检测单电池的温度；测温元件,其设置于温度传感器,检测单电池的温度；传感器主体,其一体成形有测温元件；收纳保持壳体,其设置于单电池,具备能够卡定温度传感器的卡定部,并且用于收纳温度传感器；臂状的弹性部,其从传感器主体突出设置,被卡定部卡定；平坦部,其设置于弹性部,用于在将温度传感器收纳在收纳保持壳体内时将安装工具的按压面向所述弹性部按压。(The mounting structure of the temperature sensor of the invention includes: a temperature sensor attached to the cell and detecting a temperature of the cell; a temperature measuring element provided in the temperature sensor and detecting a temperature of the single cell; a sensor main body integrally formed with a temperature measuring element; a housing holding case which is provided in the single cell, has a locking portion capable of locking the temperature sensor, and houses the temperature sensor; an arm-shaped elastic part which is arranged to protrude from the sensor body and is locked by the locked part; and a flat portion provided on the elastic portion for pressing the pressing surface of the attachment tool against the elastic portion when the temperature sensor is housed in the housing and holding case.)

1. A mounting structure of a temperature sensor, characterized by comprising:

a temperature sensor attached to a cell and configured to detect a temperature of the cell;

a temperature measuring element provided in the temperature sensor and configured to detect a temperature of the single cell;

a sensor main body provided to the temperature sensor and integrally formed with the temperature measuring element;

a housing holding case that is provided in the cell, that includes a locking portion that can lock the temperature sensor, and that houses the temperature sensor;

an arm-shaped elastic portion that protrudes from the sensor body and is locked by the locking portion; and

and a flat portion provided on the elastic portion for pressing a pressing surface of an attachment tool against the elastic portion when the temperature sensor is stored in the storage holder case.

2. The mounting structure according to claim 1,

when the temperature sensor is housed in the housing and holding case by pressing the pressing surface of the attachment tool against the flat portion, the distal end portion side of the elastic portion is flexurally deformed inward of the flat portion side.

3. The mounting structure according to claim 1,

the mounting structure further includes an electric wire portion connected to the temperature measuring element,

the wire portion includes: a lead frame connected to the temperature measuring element; an electric wire, a core wire of which has been connected with the lead frame; and a shrink tube covering the lead frame and the core wire,

the wire portion is bent into an L-shape, and when the temperature sensor is housed in the housing and holding case, the wire portion is separated from the pressing surface side of the attachment tool.

4. The mounting structure according to claim 1,

the locking portion is provided so as to protrude inside a peripheral wall portion of the housing and holding case,

the front end of the elastic part is locked by the locking part.

5. The mounting structure according to claim 1,

the elastic part is provided at each side of the sensor body,

the flat portion is provided at the center of the elastic portion.

Technical Field

The present invention relates to a mounting structure of a temperature sensor that is mounted to each cell of an assembled battery in which a plurality of cells are connected and detects the temperature of the cell.

Background

As a mounting structure of a temperature sensor for detecting the temperature of a cell of a battery module (battery pack) mounted on a vehicle such as an electric vehicle or a hybrid electric vehicle and used as a drive source, a structure disclosed in JP2014-044850a shown in fig. 7 is known.

The mounting structure 1 of the temperature sensor 3 of the conventional example shown in fig. 7 is used to contact the battery cells 2 of the battery module and detect the temperature of the battery cells 2 by the temperature sensor 3. The temperature sensor 3 includes: a synthetic resin body 4 in which a temperature detection element (not shown) such as a PTC thermistor is insert-molded on the contact surface side of the cell 2; and a pair of arm-shaped spring portions 5 made of synthetic resin, which protrude outward from the width direction side of the main body portion 4. A pair of leads 6 are led out from the upper end of the body portion 4. A temperature detection element is housed in the lower end of the body 4.

The temperature sensor 3 is held so as to be covered by a holding member 7 provided on the battery module side. The temperature sensor 3 is fixed in a state in which the body portion 4 is pressed downward by the elastic force of the pair of arm-shaped spring portions 5 pressed by the lid portion 7a of the holding member 7 and is in contact with the upper surface 2a of the single cell 2. At this time, the spring portion 5 is held by the stepped spring holding portion 7b of the holding member 7.

Disclosure of Invention

In the mounting structure 1 of the temperature sensor 3 of the conventional example, the pair of arm-shaped spring portions 5 protruding outward from the width direction side of the main body portion 4 are bent in an M-shape, the arm-shaped spring portions 5 are angled with respect to the force (fitting force) pressing the temperature detection side, that is, the lower end of the main body portion 4, and the area to which the fitting force is applied is narrow. Therefore, when the body portion 4 is assembled to the cell 2 side, the arm-shaped spring portion 5 is opened, and the force pressing the lower end of the body portion 4 to the upper surface 2a side of the cell 2 is not stable.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a mounting structure of a temperature sensor, which can reliably press the temperature sensor in a stable state when the temperature sensor is assembled to a single cell side.

The present application relates to a temperature sensor mounting structure including: a temperature sensor attached to a cell and configured to detect a temperature of the cell; a temperature measuring element provided to the temperature sensor and detecting a temperature of the single cell; a sensor main body provided with a temperature sensor and integrally formed with a temperature measuring element; a housing holding case which is provided in the single cell, has a locking portion capable of locking the temperature sensor, and houses the temperature sensor; an arm-shaped elastic portion that protrudes from the sensor body and is engaged by the engagement portion; and a flat portion provided to the elastic portion for pressing the pressing surface of the attachment tool against the elastic portion when the temperature sensor is housed in the housing and holding case.

According to the temperature sensor mounting structure of the aspect of the present application, the arm-shaped elastic portion is provided with the flat portion to be pressed by the pressing surface of the mounting tool, so that the temperature sensor can be reliably pressed in a stable state when the temperature sensor is housed and assembled in the housing and holding case.

Drawings

Fig. 1 is a front view showing a mounting structure of a temperature sensor according to an embodiment in a partial sectional view.

Fig. 2 is a perspective view of the temperature sensor.

Fig. 3 is a cross-sectional view of the temperature sensor taken from the side surface.

Fig. 4 is a sectional view of the temperature sensor taken from the front side.

Fig. 5 is a front view showing a state immediately before the temperature sensor is assembled to the cell side in a partial cross section.

Fig. 6 is a front view showing a state in which the temperature sensor is assembled to the cell side in a partial cross section.

Fig. 7 is a sectional view of a mounting structure of a conventional temperature sensor.

Detailed Description

The embodiments are described in detail below with reference to the drawings.

As shown in fig. 1, a mounting structure 10 of a temperature sensor 11 according to an embodiment is mounted to each cell D of an assembled battery (battery module) M in which a plurality of cells (battery cells) D are connected in parallel and detects the temperature of each cell D, and the mounting structure 10 includes: a temperature sensor 11 for detecting the temperature of each cell D; and a housing holding case 20 made of synthetic resin, which houses the sensor body 12 of the temperature sensor 11.

As shown in fig. 2 to 4, the temperature sensor 11 includes: a PTC thermistor (temperature measuring element) 13 having positive temperature characteristics (the resistance value increases as the temperature increases); a sensor body 12 made of synthetic resin, in which a PTC thermistor 13 is integrally molded by insert molding; a pair of arm-shaped elastic portions 14 integrally formed to protrude from each side portion of the sensor body 12 and locked to the locking portions 22 of the housing and holding case 20; and a wire portion 16 connected to the PTC thermistor 13.

As shown in fig. 1 to 6, each elastic portion 14 includes: a rising part 14a rising from an upper corner edge part of the side part of the sensor body 12; a U-shaped flexible portion 14b connected from the rising portion 14 a; and a rod-shaped distal end portion 14c integrally formed at the distal end of the flexible portion 14 b. A flat portion 15 is integrally formed between the rising portion 14a and the flexible portion 14b of each elastic portion 14, that is, at the center of the elastic portion 14, and the flat portion 15 is used to press the attachment tool 40 against each elastic portion 14 when the sensor body 12 is housed and assembled in the housing and holding case 20. As shown in fig. 5 and 6, both side portions of the lower surface 41 of the mounting tool 40 are pressing surfaces 41a that protrude downward. Each pressing surface 41a abuts against the upper flat surface 15a of the flat portion 15 of each elastic portion 14.

As shown in fig. 5 and 6, when the attachment tool 40 is pressed against the flat portion 15 and the sensor body 12 is housed and assembled in the housing and holding case 20, the pressing surface 41a of the attachment tool 40 abuts against the upper flat surface 15a of the flat portion 15, and the U-shaped flexible portion 14b is deformed inward.

As shown in fig. 3 and 4, the electric wire portion 16 connected to the PTC thermistor 13 includes: a pair of lead frames 17 connected to the PTC thermistor 13; a pair of electric wires 18, respective core wires 18a having been connected to the lead frame 17; and a shrinkage tube 19 made of rubber covering the lead frame 17 and the core wire 18a of the electric wire 18.

The wire portion 16 is bent into an L-shape. When the sensor body 12 is housed and assembled in the housing and holding case 20, the electric wire portion 16 is away from the pressing surface 41a side of the attachment tool 40.

As shown in fig. 1, 5, and 6, the housing holding case 20 housing the sensor body 12 is disposed at a position distant from the upper surface D of the cell D via a holding member 30 provided on the cell D side. The housing and holding case 20 is formed in a rectangular prism shape by synthetic resin. A locking portion 22 is integrally formed on the upper side of the inner surface of each side wall (peripheral wall portion) 21 of the housing and holding case 20. As shown in fig. 1, when the sensor body 12 is housed and assembled in the housing and holding case 20 by the mounting tool 40, the distal end portions 14c of the pair of elastic portions 14 are locked to the locking portions 22.

As shown in fig. 4, a substantially U-shaped aluminum plate 13A is integrally formed on the lower surface side of the sensor body 12 of the temperature sensor 11 so as to be exposed by insert molding. The aluminum plate 13A contacts the upper surface D of the single cell D. The lead frame 17 and the core wire 18a of the electric wire 18 are connected by soldering. In FIG. 4, a soldered portion is denoted by reference character H.

As shown in fig. 5, according to the mounting structure 10 of the temperature sensor 11 according to the embodiment, when the sensor body 12 of the temperature sensor 11 is housed in the housing and holding case 20 provided on the cell D side via the holding member 30, the pair of pressing surfaces 41a provided on the side portions of the lower surface 41 of the mounting tool 40 are pressed against the flat surfaces 15a on the upper side of the flat portions 15 provided on the pair of arm-shaped elastic portions 14 of the sensor body 12. Then, the distal end portion 14c of each arm-shaped elastic portion 14 slides on the inclined surface 22a of the locking portion 22 of the housing and holding case 20, and thereby the flexible portion 14b of each elastic portion 14 is deformed inward toward the flat portion 15 as indicated by the arrow in fig. 6. At this time, the pair of pressing surfaces 41a of the attachment tool 40 contact the flat surfaces 15a of the flat portions 15, and the force pressing the attachment tool 40 is concentrated on this portion, so that the pair of elastic portions 14 do not open outward, and the attachment tool 40 can be pressed easily and reliably in a stable state to the position of the engagement portion 22 of the storage/holding case 20.

When the flat portions 15 of the pair of elastic portions 14 are pressed by the pair of pressing surfaces 41a of the attachment tool 40, the wire portion 16 extending from the upper surface side of the sensor body 12 is bent in an L shape and is separated from the pair of pressing surfaces 41a of the attachment tool 40. Therefore, the electric wire part 16 does not interfere with the temperature sensor 11 when the temperature sensor is housed and assembled in the housing and holding case 20, and the attachment tool 40 is easily pressed. Further, the temperature sensor 11 can be made thin and small.

As shown in fig. 1, when the flat portions 15 of the pair of elastic portions 14 are pressed by the pair of pressing surfaces 41a of the mounting tool 40 until the aluminum plate 13A on the lower surface side of the sensor body 12 comes into contact with the upper surface D of the cell D, the distal end portions 14c of the pair of elastic portions 14 are locked and fixed to the locking portions 22 of the side walls 21.

As described above, by providing the flat portion 15 to be pressed by the pressing surface 41a of the attachment tool 40 at the center of the arm-shaped elastic portion 14 of the sensor body 12, the temperature sensor 11 can be stably pressed when housed and assembled in the housing and holding case 20, and the assembly workability can be improved.

Although the PTC thermistor is used as the temperature measuring element in the embodiment, an NTC thermistor or a CTR thermistor, which is an element having a negative temperature characteristic (a resistance value decreases when a temperature rises), may be used as the temperature measuring element.