JP2017110940A - Temperature measurement mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature measurement mechanism capable of securing a sufficient spring stroke to obtain a desired spring characteristic.SOLUTION: A temperature measurement mechanism according to this embodiments is a temperature measurement mechanism attached to a substrate arranged on a battery with a predetermined interval and configured to measure a temperature of an upper surface of the battery. The temperature measurement mechanism includes: a temperature measurement unit that includes a cylindrical guide part attached to substrate so as to penetrate and having a spring support part at its upper end, a guide shaft inserted into the guide part, and a contact part attached to a lower end of the guide shaft and configured to detect the temperature of the upper surface of the battery by contacting with the upper surface of the battery; and a coil spring whose one end contacts with the spring support part and the other end contacts with the contact part to press the contact part against the upper surface of the battery.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a temperature measuring mechanism.

  Conventionally, there is known a temperature measuring mechanism that measures the temperature of the upper surface of the battery by pressing the temperature sensor against the upper surface of the battery with a V-shaped spring made of synthetic resin (see, for example, Patent Document 1). In this temperature measurement mechanism, the temperature of the upper surface of the battery is measured by pressing the temperature sensor against the upper surface of the battery using a spring and bringing it into close contact.

JP 2014-044850 A

  By the way, for example, in a structure in which a substrate is mounted on an assembled battery in which a plurality of batteries are arranged (stacked), the height of the upper surface of each battery is shifted due to variations in assembling the batteries (a step is created). State). When the upper surface of each battery is fixed in a shifted state, the substrate is attached while being inclined with respect to the battery upper surface. For this reason, in the structure that measures the temperature of the battery upper surface by bringing the temperature sensor attached to the substrate into contact with the battery upper surface, the temperature sensor cannot be uniformly pressed against the battery upper surface. There may be a gap in the temperature measurement performance.

  Therefore, even when the substrate is inclined with respect to the upper surface of the battery, a coil spring having a smaller spring constant than the V-shaped spring made of synthetic resin should be used in order to uniformly press the temperature sensor against the upper surface of the battery. Can be considered.

  However, when a coil spring is used instead of a synthetic resin V-shaped spring in the temperature measuring mechanism described in Patent Document 1, the distance between the member holding the temperature sensor and the upper surface of the battery is short. A sufficient stroke cannot be secured and desired spring characteristics cannot be obtained.

  Then, in view of the said subject, it aims at providing the temperature measuring mechanism which can ensure a sufficient spring stroke and can obtain a desired spring characteristic.

In order to achieve the above object, a temperature measuring mechanism according to one embodiment of the present invention includes:
A temperature measuring mechanism that is attached to a substrate arranged on the battery at a predetermined interval and measures the temperature of the upper surface of the battery,
A cylindrical guide portion that is attached through the substrate and has a spring support at the upper end;
A temperature measuring unit including a guide shaft portion inserted into the guide portion, and a contact portion that is attached to a lower end of the guide shaft portion and detects the temperature of the battery upper surface by contacting the battery upper surface;
A coil spring that has one end abutting against the spring support portion and the other end abutting against the contact portion to press the contact portion against the upper surface of the battery.

  According to the disclosed temperature measuring mechanism, the contact portion is pressed against the upper surface of the battery by the coil spring whose one end is in contact with the spring support portion and the other end is in contact with the contact portion. Characteristics can be obtained.

Schematic diagram of temperature measuring mechanism of this embodiment

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the invention will be described with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, the duplicate description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  The temperature measuring mechanism of the present embodiment is a mechanism that is attached to a substrate arranged on the battery at a predetermined interval and measures the temperature of the battery upper surface, and detects the temperature of the battery upper surface by a coil spring. The contact portion is pressed against the upper surface of the battery. In the following, as an example, a temperature measurement capable of measuring the temperature of the upper surface of a battery in an in-vehicle battery module in which a board on which electronic components are mounted is arranged on an assembled battery in which a plurality of batteries are arranged (stacked). The mechanism will be described.

  The temperature measuring mechanism of this embodiment is demonstrated based on FIG. FIG. 1 is a schematic view of a temperature measuring mechanism of the present embodiment.

  As shown in FIG. 1, the temperature measuring mechanism is attached to a substrate 200 disposed on the battery 100 and measures the temperature of the upper surface of the battery 100. The temperature measuring unit 10, the holder unit 30, and the coil And a spring 50.

  The temperature measuring unit 10 is a part that measures the temperature of the upper surface of the battery 100, and includes a contact part 11 and a guide shaft part 16.

  The contact part 11 is a part to be brought into contact with the upper surface of the battery 100, and the thermistor 12 is sealed with a resin 13 and surrounded by a heat collecting member 14. The heat collecting member 14 is a member that conducts heat transfer between the battery 100 and the thermistor 12, and is formed in a cylindrical shape having a bottom on the side in contact with the upper surface of the battery 100, for example, by molding aluminum. The contact portion 11 detects the temperature of the upper surface of the battery 100 when the thermistor 12 contacts the upper surface of the battery 100 via the heat collecting member 14. For this reason, when the contact part 11 contacts the battery 100 upper surface, the heat of the battery 100 can be efficiently transmitted to the thermistor 12. For example, a cylindrical cover member 15 is attached to the outer peripheral surface of the heat collecting member 14. The cover member 15 is formed by press-fitting or integral molding, for example.

  The guide shaft portion 16 is a part held by the holder portion 30 and is attached to the upper end of the contact portion 11. The guide shaft portion 16 is formed of a hollow structure shaft. For example, the wiring of the thermistor 12 is inserted into the hollow portion of the guide shaft portion 16. The guide shaft portion 16 is movable in the up and down direction (Y-axis direction in FIG. 1) by the non-rotating portion 17 and is restricted from moving in the rotation direction about the up and down direction (rotation stop). Is attached to the stopper portion 41 of the holder portion 30.

  The holder part 30 is a part that holds the temperature measuring part 10, and includes a support part 31, a guide part 36, and a stopper part 41.

  The support part 31 is a part that supports the guide part 36, and is fixed to the upper surface side (the side far from the battery 100) of the substrate 200 by, for example, bolts 32, nuts 33, and spacers 34.

  The guide portion 36 is a portion that holds the guide shaft portion 16, and is formed in a cylindrical shape so as to penetrate from the upper surface side of the substrate 200 to the lower surface side (side closer to the battery 100). At the upper end of the guide portion 36, there is a spring support portion 37 bent in an L shape, and the spring support portion 37 is attached to the support portion 31.

  The inner diameter B of the guide portion 36 is formed larger than the outer diameter C of the guide shaft portion 16, and a gap is formed between the inner peripheral surface of the guide portion 36 and the outer peripheral surface of the guide shaft portion 16. Thereby, the axial direction of the guide shaft part 16 can be inclined with respect to the axial direction of the guide part 36.

  The axial length A of the guide portion 36 and the inner diameter B of the guide portion 36 can be determined according to the environment in which the temperature measuring mechanism is used. Specifically, when the inclination angle of the substrate 200 from the direction parallel to the upper surface of the battery 100 is α and the inclination angle of the guide shaft portion 16 in the axial direction with respect to the axial direction of the guide portion 36 is β, the following equation (1) When satisfy | filling, the lower surface of the heat collecting member 14 adheres to the battery 100 upper surface.

β = α (1)
Therefore, when the inclination angle of the substrate 200 assumed in an environment where the temperature measuring mechanism is used is α1, it is preferable to satisfy the following formula (2). Thereby, even if the board | substrate 200 inclines in the environment where the assumed temperature measuring mechanism is used, the lower surface of the heat collecting member 14 can be closely_contact | adhered to the battery 100 upper surface. For this reason, the measurement accuracy of the temperature of the upper surface of the battery 100 is improved.

β ≧ α1 (2)
The axial inclination angle β of the guide shaft portion 16 with respect to the axial direction of the guide portion 36 uses the axial length A of the guide portion 36, the inner diameter B of the guide portion 36, and the outer diameter C of the guide shaft portion 16. Is calculated by the following equation (3).

β = tan ⁻¹ ((B−C) / A) (3)
Therefore, the length A in the axial direction of the guide portion 36, the inner diameter B of the guide portion 36, and the outer diameter C of the guide shaft portion 16 so that the following equation (4) is satisfied by the equations (2) and (3). Is preferably determined.

tan ⁻¹ ((BC) / A) ≧ α1 (4)
The stopper portion 41 is provided on the upper surface of the guide portion 36 and holds the rotation preventing portion 17. The stopper portion 41 is formed so as to come out upward when the distance between the substrate 200 and the upper surface of the battery 100 is extremely close.

  The coil spring 50 is an elastic member in which, for example, a metal wire is spirally wound. An inner diameter E1 of the coil spring 50 is formed larger than an outer diameter D of the guide portion 36, and the guide portion 36 is disposed inside the coil spring 50.

  The coil spring 50 is provided on the outer peripheral side of the guide portion 36 between the lower surface of the spring support portion 37 and the upper surface of the cover member 15 of the contact portion 11 so that the contact portion 11 can be pressed against the upper surface of the battery 100. That is, the upper end of the coil spring 50 is in contact with the lower surface of the spring support portion 37, and the lower end of the coil spring 50 is in contact with the upper surface of the contact portion 11. Thereby, since the free length of the coil spring 50 can be lengthened compared with the case where it is attached to the lower surface of the substrate 200, a sufficient spring stroke can be secured and desired spring characteristics can be obtained. As a result, even when the substrate 200 is inclined, the contact portion 11 is pressed against the upper surface of the battery 100 by the expansion and contraction of the coil spring 50, so that the lower surface of the contact portion 11 and the upper surface of the battery 100 can be brought into close contact with each other. The temperature of the upper surface of the battery 100 can be measured with high accuracy.

  Further, the coil spring 50 is preferably formed such that, in the axial direction of the guide portion 36, the inner diameter E2 at a position corresponding to the lower end of the guide portion 36 is larger than the inner diameter E1 at other positions. Thereby, when the board | substrate 200 inclines largely, generation | occurrence | production of the frictional force by the lower end of the guide part 36 being caught by the coil spring 50 or the guide part 36 and the coil spring 50 contacting can be suppressed. . As a result, it is possible to suppress a decrease in the force with which the coil spring 50 presses the contact portion 11, so that the lower surface of the contact portion 11 can be brought into close contact with the upper surface of the battery 100 even when the substrate 200 is greatly inclined.

  As described above, according to the temperature measuring mechanism of the present embodiment, the contact portion 11 is pressed against the upper surface of the battery 100 by the coil spring 50 whose one end contacts the spring support portion 37 and the other end contacts the contact portion 11. Thus, a sufficient spring stroke can be ensured and desired spring characteristics can be obtained.

  As described above, the temperature measuring mechanism has been described with reference to the embodiments. However, the present invention is not limited to the above embodiments, and various modifications and improvements can be made within the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Temperature measuring part 11 Contact part 16 Guide shaft part 30 Holder part 36 Guide part 37 Spring support part 50 Coil spring 100 Battery 200 Board | substrate

Claims (1)

A temperature measuring mechanism that is attached to a substrate arranged on the battery at a predetermined interval and measures the temperature of the upper surface of the battery,
A cylindrical guide portion that is attached through the substrate and has a spring support at the upper end;
A temperature measuring unit including a guide shaft portion inserted into the guide portion, and a contact portion that is attached to a lower end of the guide shaft portion and detects the temperature of the battery upper surface by contacting the battery upper surface;
A temperature measuring mechanism comprising: a coil spring having one end abutting against the spring support portion and the other end abutting against the contact portion to press the contact portion against the upper surface of the battery.

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