JP2016183906A - Clip and structure for attaching temperature sensor to storage battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature sensor attaching structure that is easily fixed and exhibits an excellent detection accuracy when the temperature of a bus bar forming electric continuity between storage batteries is to be measured.SOLUTION: The present invention relates to a clip for attaching a temperature sensor to a storage battery and to a structure for attaching a temperature sensor to a storage battery, using the clip, the clip being thermally conductive and including: a leaf spring structure elastically fixed to a bus bar and elastically pressurizing a detection unit 8a of a temperature sensor 8 toward the bus bar; a grasping unit holding the bus bar and regulating removal of the bus bar; and a holding unit 7a fixing the detection unit 8a of the temperature sensor 8 at a specific position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a temperature sensor mounting structure for detecting a temperature change associated with charging or discharging of a storage battery, and in particular, for convenience when the temperature sensor is attached to the storage battery and a quick response to changes in the internal temperature of the storage battery. The present invention relates to a structure that contributes to improving the accuracy and detection accuracy.

Conventionally, a temperature sensor that detects a change in temperature of a storage battery is attached in a form that is fixed with a fixed metal fitting or the like so as to be in contact with the surface of a case or cover that constitutes a cell of the storage battery (for example, the following) Patent Document 1).
On the other hand, in order to detect a temperature change of the storage battery, it is desirable to select an attachment structure in which the temperature sensor is in direct contact with the electrode.

  However, for example, in Patent Document 2 below, it is necessary to adopt a special structure as an electrode or its peripheral structure in order to fix the temperature sensor. For example, in Patent Document 3 below, detection of the temperature sensor is required. In order to prevent the temperature sensor from being damaged, it is necessary to adopt a special structure for a part of the temperature sensor when the part is firmly screwed to the terminal of the storage battery together with the terminal of the lead wire for current extraction.

  Then, although the method of assembling a temperature detection module to the bus bar module which connected the bus bar which connects a some storage battery in series and was modularized is also introduced (for example, refer to the following patent documents 4), this is also the upper part of the battery housing | casing. The temperature is detected only directly or indirectly in contact with.

JP-A-63-19774 JP 49-32128 A Japanese Utility Model Publication No. 7-41975 JP 2009-277420 A

  As described above, in many conventional temperature sensor mounting structures for storage batteries, the shape and mounting conditions of the storage battery and the temperature sensor are limited, and the temperature detection accuracy and thermal responsiveness are improved due to such limitations. It has become a cause of obstructing, and has also become a cause of increasing the cost required to construct the temperature sensor mounting structure.

  The present invention has been made in view of the above circumstances, and is a temperature sensor mounting clip for a storage battery that realizes mounting accuracy to the storage battery, accuracy in detecting the temperature or temperature change of the storage battery, and excellent responsiveness. And a temperature sensor mounting structure for a storage battery.

  A temperature sensor mounting clip for a storage battery according to the present invention made to solve the above problems is elastically fixed to a bus bar that conducts between a plurality of storage batteries arranged in a row, and a detection part of the temperature sensor is attached to the bus bar. A clip having a leaf spring structure that is elastically pressurized toward the surface and having heat conductivity, sandwiching a side portion of the bus bar and the like and restricting the detachment of the bus bar, and detection of the temperature sensor It is characterized by comprising a holding part that holds the part in place.

The temperature sensor may be held on either the inside or the outside of the temperature sensor mounting clip, and the crimping of the temperature sensor to the bus bar is performed through a part of the temperature sensor mounting clip or other members or materials. In some cases, it is crimped to the bus bar.
The temperature sensor mounting clip is preferably formed by a single member, for example, by bending a single thin plate, but may be configured by combining a plurality of members.
The temperature sensor preferably includes a detection surface in contact with the bus bar, and a pressure receiving surface that receives pressure from the temperature sensor mounting clip on the opposite side of the detection surface.

As a specific configuration of the temperature sensor mounting clip with respect to the storage battery, for example, a holding piece that protrudes from the inside or outside of the temperature sensor mounting clip by bending or cutting a part of the holding unit to the holding unit. And a configuration including a holding wall bent into a convex shape or a concave shape or a holding slope bent into a mountain shape or the like.
Further, in order to improve the heat conduction efficiency by surface contact and the heat retention efficiency of the surrounding atmosphere, the holding piece or the holding member having a holding surface that is in close contact with the detection unit of the temperature sensor or an enclosure surface that covers the detection unit of the temperature sensor. A configuration including a wall may be mentioned.

Further, as a specific configuration of the form, the temperature sensor mounting clip includes a leaf spring structure having an M-shape composed of a holding portion interposed between the left and right leg portions and the leg portions. Can be mentioned.
By adopting such a shape, the temperature sensor mounting clip has a wave shape that alternately forms peaks and valleys although there are changes in amplitude and period, and it becomes easy to achieve elasticity as a whole.
The M-shape may be large as a whole when the whole or a part of the holding portion is submerged between the left and right leg portions, and a fine bent portion is provided on each side. You may have. In particular, if the holding part has a U-shape or a V-shape as a whole, the elastic development of the temperature sensor mounting clip as a whole often becomes remarkable.

  A temperature sensor mounting structure for a storage battery according to the present invention made to solve the above-described problem is a bus bar that conducts between a plurality of storage batteries arranged in a row, and any one of the above configurations that elastically fixes to the bus bar And a temperature sensor that is held by the temperature sensor mounting clip and is crimped to the bus bar by the elasticity of the temperature sensor mounting clip.

According to the temperature sensor mounting structure for a storage battery according to the present invention, a leaf spring structure is used which exerts elasticity when fixing to the bus bar and pressurizing the bus bar to the detection unit. The temperature sensor can be fixed without choosing the approximate location, and the temperature sensor mounting clip holding the temperature sensor can be fixed simply by elastically holding the side of the bus bar, etc. Therefore, even if the form of the bus bar is slightly different, it can be attached and detached relatively easily.
Further, since the temperature sensor mounting clip has thermal conductivity, the temperature change of the bus bar is quickly transmitted to the detection part of the temperature sensor.

  Furthermore, the holding piece or a holding wall bent in a convex shape, a concave shape, or a mountain shape, and by appropriately providing a holding surface that is in close contact with the detection portion of the temperature sensor or an enclosure surface that covers the detection portion of the temperature sensor, By making the surface of the detection part of the temperature sensor as wide as possible in contact with or in proximity to the temperature sensor mounting clip, good thermal conductivity of the temperature sensor mounting clip and heat dissipated from the bus bar or the temperature sensor mounting clip Combined with the effects of moderate retention and atmospheric heat retention, a uniform temperature or temperature change is transmitted to a relatively wide surface of the detection unit, and higher accuracy and better thermal response than before are obtained. Can do.

It is explanatory drawing which decomposed | disassembled for every member the example of the temperature sensor attachment structure with respect to the storage battery by this invention. An example of the temperature sensor attachment structure with respect to the storage battery by this invention or a temperature sensor attachment clip used for it is shown. (A): Plan view, (B): AA sectional view of (A), (C): (A). BB sectional view, (D): bottom view, (E): cc sectional view of (A), (F): dd arrow view of (B), (G): side view. . An example of the temperature sensor attachment structure with respect to the storage battery by this invention or a temperature sensor attachment clip used for it is shown in (A): Top view, (B): EE sectional drawing of (A), (C): Of (A). ff sectional view, (D): bottom view, (E): gg sectional view of (A), (F): hh arrow view of (B), (G): side view. . An example of the temperature sensor attachment structure with respect to the storage battery by this invention or a temperature sensor attachment clip used for it is shown in (A): Top view, (B): ii sectional drawing of (A), (C): Of (A). It is a j sectional view, (D): bottom view, (E): side view, (F): a view taken along the line kk of (B). An example of the temperature sensor attachment structure with respect to the storage battery by this invention or a temperature sensor attachment clip used for it is shown. (A): Plan view, (B): ll sectional view of (A), (C): (A). MM sectional view, (D): bottom view, (E): nn sectional view of (A), (F): OO arrow view of (B), (G): side view. . (A): Plan view, (B): pp cross-sectional view of (A), (C): (A) showing an example of a temperature sensor mounting structure for a storage battery according to the present invention or a temperature sensor mounting clip used therefor. q-q sectional view, (D): bottom view, (E): rr sectional view of (A), (F): ss arrow view of (B), (G): side view. . It is a front view which shows the example of the change before and behind mounting | wearing with respect to the bus bar of the temperature sensor attachment clip with respect to the storage battery by this invention. It is a front view which shows an example of the temperature sensor attachment structure (or storage battery used therein) with respect to the storage battery by this invention. It is a top view which shows the embodiment example of the temperature sensor attachment structure with respect to the storage battery by this invention. It is a left view which shows the example of the embodiment of the temperature sensor attachment structure with respect to the storage battery by this invention. It is a right view which shows the example of the embodiment of the temperature sensor attachment structure with respect to the storage battery by this invention.

Embodiments of a temperature sensor mounting structure for a storage battery according to the present invention will be described below in detail with reference to the drawings.
In the embodiment described below, a storage battery having a rectangular parallelepiped cell 1 having a relatively small depth and having a pair of positive and negative electrodes 2 and 2 substantially symmetrical on the upper surface thereof is used (FIGS. 8 to 8). 11).
Each electrode 2, 2 of this storage battery is a cylindrical conductive rod that stands up from the center of the base 3, 3 of each of the positive and negative electrodes 2, 2, and a screw thread into which the nuts 4, 4 are screwed is cut. It is what was done.
The terminals of the bus bar 5 and other electric circuits are connected to a power supply circuit including a plurality of storage batteries by inserting the electrodes 2 and 2 into a terminal hole 6 included in the bus bar 5 and sandwiching the terminals with the base 3 and the nut 4. And hold.

  The example of the temperature sensor mounting structure for the storage battery shown in FIG. 1 and FIG. 2 is a flat bus bar 5 that conducts between a plurality of storage batteries arranged in a row, and is elastically fitted to both sides of the bus bar 5. Temperature sensor mounting clip (hereinafter referred to as “clip 7”) and a temperature sensor 8 that is held inside or outside the clip 7 and is pressure-bonded to the bus bar 5 by the elasticity of the clip 7. is there.

[clip]
The clip 7 in the example shown in FIGS. 1 and 2 and FIGS. 7A, 7B, and 7E is a rectangular metal plate with good thermal conductivity, or a resin plate containing carbon or carbon fiber. The left and right leg portions 7b and 7b are provided symmetrically, and the holding portion 7a is interposed between the left and right leg portions 7b and 7b. Configure.

  The holding part 7a in the example shown in FIG. 2 functions as a rectangular leaf spring that is substantially equal to the width of the bus bar 5 and has a recessed middle part, leaving the central part as a pressurizing region, and cutting the left and right inwards. The holding pieces 7c, 7c are provided with the width of the detection portion 8a of the temperature sensor 8 being separated.

The leg portions 7b, 7b in this example have a length suitable for pressing the detection portion 8a of the temperature sensor 8 held inside the clip 7 to the bus bar 5 by the elasticity of the clip 7 as a whole. The left and right end portions of the holding portion 7a are bilaterally symmetric in the same direction and bent to an acute angle slightly smaller than a right angle.
The both leg portions 7b and 7b are symmetrically provided with, for example, notches 7d and 7d that are U-shaped toward the nearest end of the holding portion 7a, and an area surrounded by the notches 7d. The locking piece is formed so that the region surrounded by the notch 7d protrudes inward by folding the clip 7 toward the inside of the M-shape of the clip 7 while interlocking the edges of both legs 7b, 7b. 7e, and a gripping portion including a receiving piece 7f whose end edge is widened when viewed from the holding portion 7a.

  Due to the above structure, the clip 7 as a whole has a gripping portion that elastically sandwiches both side edges of the bus bar 5 and prevents detachment from the bus bar 5, and a detection portion 8a of the temperature sensor 8 on the inner surface. A holding portion 7 a that is held at a fixed position and pressurizes toward the bus bar 5 is provided.

[Bus bar]
The bus bar 5 shown in FIGS. 1 to 6 and FIGS. 8 to 11 is a rectangular conductive metal piece.
The bus bar 5 has a width that can be provided with terminal holes 6 for inserting the electrodes 2 of adjacent storage batteries one by one, and has a length that can provide a predetermined interval between the storage batteries connected by the bus bar 5. The bus bar 5 has a thickness under which the current can flow with a resistance suitable for the purpose and can be suitably sandwiched between the base 3 and the nut 4.

The bus bars 5 in these examples are connected by a plurality of insulating substrates 9 made of an insulating plate such as an epoxy-based material, and the storage batteries connected by the bus bars 5 are arranged in parallel with each other and at a constant interval. The
The bus bar 5 in this example has a flat plate shape. However, as long as the function as the bus bar 5 is not hindered, its form and material can be changed as appropriate. It can be suitably changed according to the form of 5.

[Temperature sensor]
The temperature sensor 8 includes a detection unit 8a including a sensor element such as a thermistor, and a cable 8b that takes out the output of the sensor element in accordance with the temperature of the environment where the detection unit 8a is placed or the change from the detection unit 8a. .
The detection unit 8a in this example includes a flat detection surface that is enclosed in a ceramic in which the sensor element is formed in a rectangular parallelepiped shape, and is in close contact with the surface of the bus bar 5, and on the opposite side of the detection surface. A flat pressure-receiving surface that receives pressure from the clip 7 is provided.
The shapes of the detection surface and the pressure receiving surface are appropriately set so that efficient heat conduction is performed according to the structure of the clip 7 and the bus bar 5.
The covering material of the sensor element is not limited to the ceramic, but can be appropriately selected from materials having thermal conductivity such as copper, stainless steel, aluminum, or resin. It may be desirable to have insulation.

In the temperature sensor mounting structure for the storage battery configured as described above, the detection portion 8a is sandwiched between the pair of holding pieces 7c, 7c protruding inside the clip 7 while utilizing the elasticity of the clip 7. The temperature sensor 8 is held at a fixed position (see FIG. 7A).
When the temperature sensor 8 is mounted on the bus bar 5, the lower ends of the legs 7 b and 7 b of the clip 7 holding the temperature sensor 8 are engaged with the engaging pieces 7 e and 7 e on the back surface of the bus bar 5. This is achieved simply by pressing against the left and right sides of the bus bar 5 until a snap sound is produced.

At that time, the left and right leg portions 7b, 7b are pushed open to the bus bar 5 from the tapered state, and become substantially parallel when the fixing to the bus bar 5 is completed.
The slopes of the receiving pieces 7f, 7f continuous to the locking pieces 7e, 7e provided at the ends of the leg portions 7b, 7b of the clip 7 are arranged so that the bus bar 5 is moved to the inside of the clip 7 in accordance with the pressing operation. The bus bar 5 is helped to be mounted so as not to be detached from the clip 7.

  In addition to the above-described structure, the clip 7 has a structure for holding the detection portion 8a of the temperature sensor 8 in which the holding portion 7a functioning as a leaf spring having a width slightly wider than the width of the bus bar 5 is provided as a pair of right and left. The holding pieces 7c and 7c, which are interposed between the leg portions 7b and 7b and are formed by cutting the central portion of the holding portion 7a to the left and right, project inward across the width of the detecting portion 8a of the temperature sensor 8. By providing, it can be set as the structure provided with the pressurization area | region which pressurizes the said detection part 8a toward the said bus bar before and behind the said center part opened and cut off right and left (for example, refer FIG. 5).

  The structure of holding the detection portion 8a of the temperature sensor 8 of the clip 7 may adopt a structure other than the structure provided with the pair of holding pieces 7c and 7c.

For example, the holding wall 7g for supporting the detection unit 8a in a fixed position is formed by bending the clip 7 into a convex shape and sandwiching the detection unit 8a inside the protruding portion at the center of the holding unit 7a. You may form inside the said clip 7 (for example, refer FIG. 3).
Conversely, by forming the clip 7 into a concave shape, providing a rectangular pressure region with a recessed middle portion, and sandwiching the detection portion 8a in a central recess of the holding portion 7a, the detection portion 8a is You may form the holding wall 7g supported in a fixed position on the outer side of the said clip 7 (for example, refer FIG. 6).
By adopting such a configuration, when the detection unit 8a indirectly receives the temperature and temperature change of the bus bar 5, the holding surface can be made wider, thereby increasing the contact surface and efficiently changing the temperature. Can respond.

For example, the holding portion 7a of the clip 7 may be bent and formed into a mountain shape so that the detecting portion 8a is guided and supported at a fixed position by holding slopes 7h and 7h sandwiching the detecting portion 8a (for example, FIG. 4).
By adopting such a configuration, when the detection unit 8a indirectly receives the temperature and temperature change of the bus bar 5, the holding slopes 7h and 7h become the enclosure surface, and the temperature can be efficiently increased by the staying effect of the nearby atmosphere. Can respond to changes.

In the above example, in order to efficiently extract the action of the leaf spring structure as a whole of the clip 7, the angle formed by the leg portion 7b and the holding portion 7a of the clip 7 is close to a right angle (greater than 45 degrees). In addition, it is desirable that the gripping portion is formed so as to be substantially perpendicular when fixed to the bus bar 5.
Further, the pair of holding pieces 7c, 7c or the holding wall 7g is formed to be tapered toward the opening, and the taper is slightly relieved when the detection unit 8a is held by them. It is desirable to mold as described above (see, for example, FIGS. 7A, 7B, 7D, and 7E).

  For example, as shown in FIG. 4, as shown in FIG. 2 or FIGS. 7B and 7E, the holding surface that is in close contact with the detection unit 8a of the temperature sensor 8 or the detection unit 8a without being in close contact with the detection unit 8a. By bringing the surface of the enclosure surface covering the detection portion 8a of the temperature sensor 8 into contact with the clip 7 as wide as possible, the temperature change of the bus bar 5 is coupled with the good thermal conductivity of the clip 7 and the temperature changes. A uniform temperature or temperature change is transmitted to the detection unit 8a of the sensor 8 quickly and to a relatively wide surface of the detection unit 8a.

Thus, the form of the holding part 7a and the leg parts 7b and 7b and the form, position and number of the locking piece 7e are appropriately changed according to the form of the detection part 8a of the temperature sensor 8, the form of the bus bar 5, and the like. can do.
For the convenience of mounting on the bus bar 5, for example, a grease or an adhesive having a good thermal conductivity is provided between the holding piece 7 c, the holding wall 7 g or the holding slope 7 h and the detection portion 8 a of the temperature sensor 8. May be filled, or a double-sided tape may be interposed. (See FIG. 2).

1 cell, 2 electrodes, 3 base, 4 nut, 5 bus bar, 6 terminal hole,
7 clip, 7a holding part, 7b leg part, 7c holding piece, 7d cut,
7e locking piece, 7f receiving piece, 7g holding wall, 7h holding slope,
8 Temperature sensor, 8a detector, 8b cable,
9 Insulating substrate,

Claims (5)

A clip having a leaf spring structure that elastically fixes to a bus bar that conducts between a plurality of storage batteries arranged in a row and elastically presses a detection portion of a temperature sensor toward the bus bar, and has thermal conductivity Because
A temperature sensor mounting clip for a storage battery, comprising: a gripping part that sandwiches the bus bar and restricts detachment of the bus bar; and a holding part that holds the detection part of the temperature sensor in place.   The temperature sensor mounting clip for a storage battery according to claim 1, wherein the holding portion includes a holding piece, a holding wall, or a holding slope.   The temperature for the storage battery according to claim 2, comprising the holding piece, the holding wall, or the holding slope having a holding surface that is in close contact with the detection unit of the temperature sensor or an enclosure surface that covers the detection unit of the temperature sensor. Sensor mounting clip.   The temperature sensor mounting clip having the leaf spring structure has an M-shape including a left and right leg part and a holding part interposed and interposed between the leg part. A temperature sensor mounting clip for the storage battery according to claim 1. A bus bar for conducting electricity between a plurality of storage batteries arranged in a row, the temperature sensor mounting clip according to any one of claims 1 to 4, wherein the temperature sensor mounting clip is elastically fixed to the bus bar, and the temperature sensor mounting clip. A temperature sensor mounting structure for a storage battery, comprising a temperature sensor held on the bus bar and pressed against the bus bar by the elasticity of the temperature sensor mounting clip.

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