KR100452541B1 - Battery cover unit - Google Patents

Abstract

(Problem) A battery cover that prevents the accuracy of the protection device from being deteriorated by using a thermal switch as the protection device, and also incorporates the protection device into the battery cover unit and unitizes the battery cover to form a compact, good assembly and inexpensive battery. To provide a unit.

(Measures) A metal battery cover 2 for sealing a battery cell 1 used for a secondary battery and shielding the inside of the battery cell 1, and a thermal switch 4 in which a switch is switched at a predetermined temperature. And the thermosensitive switch 4 was attached to the battery cover body 2, and the thermosensitive switch 4 and the battery cover body 2 were integrated, and the unitization was aimed at.

Description

Battery cover unit {BATTERY COVER UNIT}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a structure of a battery cover unit which is mainly used for chargeable lithium ion secondary batteries of mobile devices such as video cameras, notebook computers, mobile phones, and the like, and seals battery cells.

11 is a front view of a conventional battery.

The battery cell 51 is comprised from the case body made from aluminum, and has the rectangular bottom wall part 51a and the side wall part 51b extended and installed upward from the bottom wall part 51a, and this bottom wall part 51a Although not shown in the interior 51c surrounded by the side wall portion 51b, an electrode group composed of a positive electrode plate and a negative electrode plate, a separator provided between the positive electrode plate and the negative electrode plate, and a lithium salt are dissolved in an organic solvent. It is immersed in and the electrolyte solution which makes this electrode group the power generation element is inject | poured.

The battery cover body 52 has an aluminum plate-like member 52a and an electrode portion 52b protruding from the plate-like member 52a. The battery cover body 52 is an opening of the battery cell 51. It is provided so as to prevent 51d, and is firmly fixed to the battery cell 51 by performing laser welding on the outer circumference thereof to seal the inside 51c. Moreover, the electrode part 52b of this battery cover body 52 is connected to the negative electrode plate (not shown), and comprises the negative electrode.

An Al-Ni cladding material 53 made of an aluminum layer and a nickel layer is attached to the bottom wall portion 51a by welding or the like. A lead wire 54 made of nickel is connected from the nickel layer, and bent at a right angle to the side wall portion. It extends in parallel with 51b.

The insulating sheet 55 has an elongated rectangular shape and is bonded to the side wall portion 51b by means of adhesion or the like to insulate the lead wire 54 and the battery cell 51. The protection device 56 is comprised of PTC which raises a resistance by temperature and suppresses a flow of an electric current, one terminal part 56a is connected with the lead wire 54, and the other terminal part 56b is nickel. It is connected to the lead wire 57 formed. And the cladding material 53 is connected to the positive electrode plate (not shown), and the lead wire 57 comprises the positive electrode. In addition, although not shown, the protection device is connected with a battery protection circuit equipped with an IC that monitors the voltage state and switches the switch, and the battery protection circuit is mounted in the battery cell 51.

Conventional batteries have the configuration as described above, but in order to reduce the cost of the batteries, battery protection circuits are provided in the form of inserting the battery protection circuits on the side of the electronic apparatus on which the batteries are mounted, thereby simplifying the batteries themselves. However, in the conventional battery, PTC is used as the protective device 56. When the temperature rises and the resistance value changes, the PTC does not return to the original resistance value even when the temperature decreases. If high heat is applied when the PTC is connected to the lead wires 54 and 57, there is a problem that the resistance value of the PTC inevitably increases during the battery manufacturing process. In addition, since the insulating sheet 55 is bonded to each other, and the protective devices 56 are connected to the lead wires 54 and 57, the score of the assembled parts increases, resulting in poor assemblability and poor productivity. There is a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and by using a thermal switch as a protection device, the accuracy of the protection device is prevented from being lowered, and the protection device is integrated into the battery cover body and unitized, thereby minimizing and assembling. It is an object of the present invention to provide a battery cover unit which has good properties and can constitute an inexpensive battery.

1 is a front view of a battery to which the battery cover unit of the present invention is mounted.

2 is a sectional view of principal parts of the first embodiment U of the battery cover unit of the present invention.

3 is an exploded perspective view of the first embodiment U of the battery cover unit of the present invention.

4 is a side view of the protective device according to the first embodiment U of the battery cover unit of the present invention.

Fig. 5 is a sectional view showing the main parts of a state in which the terminal portion of the protective device according to the first embodiment of the battery cover unit of the present invention is mounted.

6 is an exploded perspective view of a second embodiment U1 of the battery cover unit of the present invention.

Fig. 7 is an exploded perspective view showing the main parts of a modification of the insulating portion according to the second embodiment of the battery cover unit of the present invention.

8 is a sectional view showing the principal parts of a third embodiment U2 of the battery cover unit of the present invention.

9 is an exploded perspective view of a third embodiment U2 of the battery cover unit of the present invention.

10 is a perspective view showing a modification of the battery cover body according to the battery cover unit of the present invention.

11 is a front view of a conventional battery.

* Description of the main parts of the drawings *

1 battery cell 1a bottom wall portion

1b: side wall portion 1c: inside

1d: injection hole 2: battery cover body

2a: plate member 2b: housing

2c: safety valve 2d: first through hole

2e: first recess 2f: second recess

2g: recessed portion 2h: third recessed portion

3: insulation member 3a: main body

3b: rectangular hole 3c: first insulating portion

3d: insulator 3e: through hole

3f: guide part 3g: protrusion

DESCRIPTION OF SYMBOLS 4 Thermal switch (protector) 4a Body part 4b 1st connection terminal 4c 2nd connection terminal 4d 1st terminal piece 4e 2nd terminal piece

4f: Through Hole 4g: Donation

4h: bending piece 4k: aluminum layer

4m: nickel layer 4n: protrusion 4p: second through hole 5: waterproof sheet

5a: indentation 6: gasket

7: rivet (electrode part, holding means) 7a: gas

7b: projection 8: metal plate

9 Insulation Sheet 10 Insulator 10a Through Hole 11 Insulation Guide

11a: guide portion 12: insulating member

12a: main body 12b: rectangular hole

12c: 1st insulation part 12d: 2nd insulation part

12e: third through hole 12f: guide part

12g: projection 12h: extension part

13: rivet (holding means) B: battery

C: Clad material U: Battery cover unit

U1: battery cover unit U2: battery cover unit

T1: 1st terminal part T2: 2nd terminal part

As a 1st means for solving the said subject, the battery cover unit of this invention is a metal battery cover body which seals the battery cell used for a battery and shields the inside of this battery cell, and the thermal switch which switch is switched at predetermined temperature. The thermosensitive switch was mounted on the battery cover, and the thermosensitive switch and the battery cover were integrated.

In addition, as the second solution, the thermal switch of the battery cover unit of the present invention has a main body portion provided with a blocking means for interrupting the converter, wherein the battery cover body is provided with a first recessed portion, and the first recessed portion. The main body part was accommodated in the structure.

Further, as a third solution means, the thermal switch of the battery cover unit of the present invention has a first terminal portion which is connected to the blocking means and protrudes from the main body portion, and has a first portion between the first terminal portion and the battery cover body. The insulation part was arrange | positioned, and the said battery cover body was set as the structure in which the 2nd recessed part which accommodates a said 1st insulation part is formed.

In addition, as a fourth solution means, the first insulating portion of the battery cover unit of the present invention is formed of a synthetic resin molded article, and the first insulating portion is provided with a guide portion for positioning the width direction of the first terminal portion. .

Further, as a fifth solution, the first insulating portion formed of the molded article of the synthetic resin of the battery cover unit of the present invention has a projection, and the first terminal portion has a through hole, and the projection inserted through the through hole is provided. By caulking, it was set as the structure in which the said thermal switch was attached to the said 1st insulating part.

As a sixth solution, the first terminal portion of the battery cover unit of the present invention has a bent piece, and an end portion of the bent piece where the bent line is located is positioned on the first insulating portion.

Moreover, as a 7th solution means, the said thermal switch of the battery cover unit of this invention has the 2nd terminal piece extended in the opposite direction to the said 1st terminal piece, and this 2nd terminal part is welded to the said battery cover body, The thermal switch and the battery cover were electrically connected and integrated.

As an eighth solution, the battery cover of the battery cover unit of the present invention is formed of an aluminum material, and the second terminal portion is formed of a clad material having at least an aluminum layer, and the aluminum layer is formed of the battery cover. The second terminal portion was welded to the battery cover body in a state opposite to the structure, so that the thermal switch and the battery cover body were electrically connected and integrated.

Moreover, as a ninth solution means, the said thermal switch of the battery cover unit of this invention has the connection terminal extended in the opposite direction to the said 1st terminal piece, and the said storage cover body is a storage recess which communicates with a said 1st recessed part. A metal terminal was attached to the accommodating recess, and the connection terminal was accommodated in the accommodating recess, laminated on the metal terminal, and connected to the metal terminal.

As a tenth solution, the battery cover of the battery cover unit of the present invention is formed of an aluminum material, and the metal terminal is formed of a clad material having at least an aluminum layer, and the aluminum layer is formed in the storage recess. In the opposite state, the metal terminals were welded and mounted on the battery cover body, and the connection terminals were laminated and connected to a surface opposite to the surface on which the metal terminals were welded.

In addition, as an eleventh solution, an electrode portion is inserted through the battery cover of the battery cover unit of the present invention, and the electrode portion and the battery cover are insulated from each other.

In addition, as a twelfth solution, the electrode portion of the battery cover unit of the present invention is insulated from the battery cover by an insulator, and the first insulator and the insulator are integrated to form an insulating member. It was.

As a thirteenth solution, the electrode portion of the battery cover unit of the present invention constitutes a holding means, and the insulating member and the battery cover body are fixed by the electrode portion.

Further, as a fourteenth solution, the thermal switch of the battery cover unit of the present invention has a second terminal piece extending in a direction opposite to the first terminal piece, and at the same time a first through hole is formed in the battery cover body. And a second through hole is formed in the second terminal portion, a holding means is inserted through the first and second through holes, and the second terminal portion and the battery cover body have a second insulating portion disposed therebetween. And the thermal switch and the battery cover body are integrated in a state where the second terminal portion and the holding means are electrically connected to each other.

Further, as a fifteenth solution, the holding means of the battery cover unit of the present invention is constituted by a rivet, and the end of the rivet is caulked to fix the second terminal portion and the battery cover body.

Moreover, as a 16th solution means, it was set as the structure by which the said 3rd recessed part which accommodates the said 2nd insulating part is formed in the said battery cover body of the battery cover unit of this invention.

As a seventeenth solution, a third through hole is formed in the second insulating portion of the battery cover unit of the present invention, and the holding means is inserted into the first, second, and third through holes, and the second through hole is formed. It was set as the structure which the terminal part and the said battery cover body are fixed.

In addition, as the eighteenth solution, the first insulating portion and the second insulating portion of the battery cover unit of the present invention are integrated to form an insulating member.

Further, as a nineteenth solution, a waterproof sheet or a waterproof sealant was formed on at least a main body of the thermal switch of the battery cover unit of the present invention.

As a twentieth solution, the battery cover of the battery cover unit of the present invention is provided with a plurality of convex portions protruding to the side where the thermal switch is stored, and the convex portions protrude beyond the main body of the thermal switch. It was made.

Further, as a twenty-first solution, the thermosensitive switch integrated with the cover body of the battery cover unit of the present invention is constituted of bimetal.

Moreover, as a 22nd solution means, the battery cover unit of this invention was comprised so that the said thermal switch might be accommodated so that it might not protrude from the surface of the said battery cover body.

As a twenty-third solution, the battery cover unit of the present invention has a configuration in which a safety valve is formed around the thermal switch.

Embodiment of the invention

BRIEF DESCRIPTION OF THE DRAWINGS The drawing of the battery cover unit of this invention is demonstrated, FIG. 1 is a front view of the battery in which the battery cover unit of this invention is mounted, FIG. 2 is sectional drawing of the principal part of 1st Embodiment U of the battery cover unit of this invention, FIG. Is an exploded perspective view of a first embodiment U of the battery cover unit of the present invention, FIG. 4 is a side view of a protective device according to the first embodiment U of the battery cover unit of the present invention, and FIG. 5 is a side view of the battery cover unit of the present invention. It is a principal part sectional drawing which shows the state with the terminal part of the protection apparatus which concerns on 1st embodiment.

The battery cover unit of the present invention is used to seal the battery cell 1 of the organic battery B, such as a lithium ion secondary battery, as shown in FIG. As used for explosion protection, first, the first embodiment U of the battery cover unit of the present invention and the form of the battery B in which the battery cover unit U is used will be described.

The battery cell 1 is composed of a case body made of aluminum, and has a rectangular bottom wall portion 1a and a side wall portion 1b extending upwardly from the bottom wall portion 1a and provided upright, and the bottom wall portion 1a. And an inside 1c surrounded by the side wall portion 1b, although not shown, an electrode group composed of a positive electrode plate and a negative electrode plate, a separator provided between the positive electrode plate and the negative electrode plate, and a lithium salt dissolved in an organic solvent. It is immersed in a group, and the electrolyte solution which makes this electrode group a power generating element is inject | poured.

The battery cover 2 is formed of a plate-like member 2a made of aluminum, an accommodating portion 2b formed over an end portion on one side from the center, and an end portion on the opposite side.

In addition, a metal thin film is formed at the lower end of the through hole penetrating up and down, and has a safety valve (2c) for opening with a rise in the pressure inside the battery to lower the internal pressure, and a first through hole (2d) formed at the center. .

The accommodating part 2b arrange | positioned around the safety valve 2c has the 1st recessed part 2e formed in the vicinity of the edge part, and an end side further from this 1st recessed part 2e via the edge part. It has a 2nd recessed part 2f formed in the recessed part, and the recessed part 2g which is formed in the center of the plate-shaped member 2a, and communicates with the 1st through-hole 2d.

The insulating member 3 is composed of molded articles made of synthetic resin such as PP (polypropylene) and PPS (polyphenylene sulfide), and forms a thin rectangular shape to form a rectangular rectangular hole 3b therein. The main body portion 3a to be formed, the first insulating portion 3c formed in the reverse convex shape from one end of the main body portion 3a to the lower side, and the other end side, and formed on the lower side from the main body portion 3a. And an insulator 3d having a through hole 3e in the center thereof. Moreover, the 1st insulating part 3c has the guide part 3f provided one step | step from the edge part of the two frames of the longitudinal direction of the main-body part 3a, and the protrusion which protrudes upward from the center part of this guide part 3f. It has (3g).

Such an insulating member 3 is accommodated in the housing portion 2b of the plate-like member 2a, the first insulating portion 3c is stored in the second recessed portion 2f, and the insulator 3d is concave. It is accommodated in the part 2g, and the positioning of the insulating member 3 is performed reliably. At this time, the 1st through-hole 2d of the plate-shaped member 2a and the through-hole 3e of the insulator 3d are in communication, and the depth dimension of the 2nd recessed part 2f is 1st insulation. Since the first insulating portion 3c does not protrude from the second concave portion 2f, since the first insulating portion 3c is designed to be approximately equal or larger than the thickness dimension of the portion 3c, the battery cover unit U can be thinned. have. In addition, since the depth dimension of the concave portion 2g is also designed to be approximately equal to or larger than the thickness dimension of the insulator 3d, the insulator 3d does not protrude from the concave portion 2g, so that the battery cover unit U ) Can be reduced in thickness.

The thermal switch 4, which is a protective device, has a rectangular main body portion 4a made of a molded article made of synthetic resin having a blocking means (not shown) having a switch portion composed of a bimetal, and is connected to the blocking means and protrudes from both sides of the main body portion. The first and second connection terminals 4b and 4c to be joined and the first and second terminal pieces 4d and 4e which are welded at the ends of the first and second connection terminals 4b and 4c and extend in opposite directions to each other. ) Moreover, the 1st terminal piece 4d has the base 4g in which the through hole 4f was formed, and the bending piece 4h formed by bend | folding perpendicularly from the edge part of this base 4g.

In addition, while the first connection terminal 4b is made of nickel, the first terminal piece 4d is made of nickel, and the first connection terminal 4b and the first terminal piece 4d are ultrasonic welding. It is welded by the resistance welding, etc., and comprises the 1st terminal part T1. In addition, the 1st connection terminal 4b and the 1st terminal piece 4d may be comprised from phosphor bronze. Moreover, the structure welded with each other by the combination of nickel and phosphor bronze may be sufficient.

The second connecting terminal 4c is made of nickel, and the second terminal piece 4e is made of an Al-Ni cladding material C having an aluminum layer 4k and a nickel layer 4m, and made of aluminum. The layer 4k is provided with a welding projection 4n (projection) projecting downward. The second connecting terminal 4c and the second terminal piece 4e are welded by ultrasonic welding or resistance welding to form the second terminal portion T2. Moreover, the structure which comprised the 2nd connection terminal 4c by phosphor bronze and formed the phosphor bronze layer instead of the nickel layer 4m may be sufficient. Moreover, you may use the combination which welds nickel and phosphor bronze. In addition, a brass layer and an iron layer may be formed instead of the nickel layer 4m. In addition, the cladding material (C) may not necessarily be two layers. When the thermal switch 4 reaches the reference temperature, the switch unit, which is a blocking means, is switched to the OFF state, and when the temperature is lower than the reference temperature, the switch unit is switched to the ON state again so that current flows again. Even if the addition is switched, the reference temperature does not change well.

The thermal switch 4 having such a configuration passes through the through hole of the insulating member 3 and is accommodated in the first concave portion 2e. At this time, the thermal switch 4 is fixed to the insulating member 3 by passing through the projection 3g of the first insulating portion 3c and caulking the through hole 4f of the first terminal piece 4d. In addition, the base 4g of the first terminal portion 4d is guided by the guide portion 3f, so that the thermal switch 4 is secured. Moreover, since the edge part of the bending piece 4h in which the bending line X is located is located on the 1st insulating part 3c, the battery cover 2 and 1st terminal part T1 can be reliably insulated. have.

Moreover, the aluminum layer 4k of the 2nd terminal piece 4e will be in the state which opposes the battery cover 2, and the 2nd terminal piece 4e and the battery cover 2 are welded by resistance welding. It is electrically conductive. Moreover, since the protrusion part 4n is formed in the aluminum layer 4k, electric power is concentrated at the time of resistance welding, the protrusion part 4n melt | dissolves, and the welding of the 2nd terminal piece 4e and the battery cover body 2 is carried out efficiently. Is executed. It goes without saying that welding may be performed using ultrasonic welding or the like.

The waterproof sheet 5 is comprised from thin sheets, such as PP (polypropylene) and PE (polyethylene), the cutout part 5a is formed in the edge vicinity, and the adhesive agent is apply | coated on the lower surface. Such a waterproof sheet 5 is bonded so as to cover the main body portion 4a of the thermal switch 4 in a state where the bending piece 4h is penetrated through the cutout portion 5a, and the thermal switch 4 is dripping. Protect from

The gasket 6 is composed of molded articles of synthetic resins such as PP (polypropylene) and PPS (polyphenylene sulfide), and has a cylindrical base 6a and a cylindrical shape projecting upward from the center of the base 6a. It has the upper passage part 6b, the passage part 6b penetrates through the 1st through hole 2d and the through hole 3e from the lower side of the battery cover body 2, and the base 6a and the battery cover body ( 2) the lower surface is in close contact.

The rivet 7 which is an electrode part and a holding means has the base 7a and the protrusion 7b, and the protrusion 7b is inserted in the passage part 6b of the gasket 6. Moreover, this projection 7b consists of a thin plate which has the through hole 8a, penetrates also through the through hole 8a of the metal plate 8 mounted on the insulator 3d, and a tip part is caulked, and the insulating member 3 is carried out. Is fixed to the battery cover 2.

1st Embodiment U of the battery cover unit of this invention comprises the structure mentioned above, and is attached to the battery cell 1 as mentioned above, and comprises the battery B, and the battery cover body 2 which consists of aluminum has the negative Through the second terminal piece 4e and the thermal switch 4 welded to the battery cover 2, the first terminal piece 4d constitutes a negative electrode, and the rivet 7 is mounted on a positive electrode plate (not shown). This connection, the rivet 7 functions as an electrode part of a positive electrode, and is increasing the area with the metal plate 8.

Next, the first embodiment U of the battery cover unit of the present invention and the manufacturing method of the battery B in which the battery cover unit U is used will be described. First, the insulating member 3 is attached to the battery cover 2. It mounts in the state positioned by the accommodating part 2b, penetrates the thermal switch 4 through the rectangular hole 3b, accommodates it in the 1st recessed part 2e, and covers the upper surface, The waterproof sheet 5 )). Moreover, in the state which sandwiched the gasket 6, the battery cover body 2, and the insulating member 3, the rivet 7 is cocked to the metal plate 8, and each member is fixed and the battery cover unit U To form. Moreover, the case body of the battery cell 1 in which the electrode plate etc. were provided in the inside 1c is formed, and the case body and the battery cover unit U of this battery cell 1 are dried. This drying is because lithium reacts easily with water. Then, the battery cover unit U is welded to the case body of the battery cell 1 by laser welding, the interior 1c is sealed, and the electrolyte is injected from the injection port 1d formed in the side wall portion 1b to inject the injection port 1d. Seal) Thereafter, the electrolyte solution flowing at the time of injection is washed with water and dried to prepare Battery B.

As described above, in the manufacturing process of the first embodiment U of the battery cover unit and the battery B, the battery cover unit U is exposed to the surrounding environment such as the electrolyte is scattered or the water is scattered when washing the water. ), The thermal switch 4 and the like are reliably fixed, so that these parts do not shift by hydraulic pressure or the like. Since the waterproof sheet 5 is bonded so as to cover the temporary heat switch 4, the thermal switch 4 does not have to be wet. Moreover, when each component is attached to the battery cover body 2, since the battery cover unit U can be manufactured, it is very easy.

Next, the drawings of the second embodiment U1 of the battery cover unit of the present invention will be described. FIG. 6 is an exploded perspective view of the second embodiment U1 of the battery cover unit of the present invention, and FIG. 7 is a view of the battery cover unit of the present invention. It is a principal part exploded perspective view which shows the modification of the insulated part which concerns on 2nd Embodiment.

The battery cover body 2 of the second embodiment U1 of the battery cover unit of the present invention differs from the battery cover body 2 of the first embodiment U in that no accommodation portion is formed, and the first concave portion ( 2e) and the 2nd recessed part 2f adjoin, and the recessed part 2g is formed independently in the center of the plate-shaped member 2a. In addition, in the second embodiment U1 of the battery cover unit, instead of the insulating member 3 of the first embodiment U, the insulating sheet 9 and the insulator 10 as the first insulating portion are separately provided. The insulating sheet 9 which is a 1st insulating part is comprised from the insulating sheet of synthetic resins, such as PP (polypropylene) and PPS (polyphenylene sulfide), and is accommodated in 2nd recessed part 2f, and is adhere | attached.

The insulator 10 is composed of thin molded articles made of synthetic resin such as PP (polypropylene) and PPS (polyphenylene sulfide), and has a through hole 10a formed in the center thereof, and the insulator 10 has a concave portion. It is accommodated in 2g. Since the other structure is the same as the structure of 1st Embodiment U of the battery cover unit of this invention, the same number is attached | subjected to the same member and description is abbreviate | omitted. In addition, as a modification of the insulating sheet 9, as shown in FIG. 7, the insulating guide 11 with the guide part 11a may be used as a 1st insulating part. The base 4g of the first terminal piece 4d of the thermal switch 4 is guided and positioned in this guide portion 11a. Moreover, you may caulk the base 4g by forming a processus | protrusion from the guide part 11a.

In addition, although not shown, in the 1st recessed part 2e, the accommodating recess part is formed so that it may contact with this 1st recessed part 2e in the side which opposes the 2nd recessed part 2f, A metal terminal made of an Al-Ni clad material is welded to the bottom surface, and the second connecting terminal 4c from which the second terminal piece 4e is removed is welded so as to be laminated on the metal terminal, and the second connecting terminal 4c is welded. It may be accommodated. At this time, if the depth dimension of the storage recessed portion is approximately equal to or larger than the thickness dimension of the second connection terminal 4c and the entire metal terminal, the thickness can be reduced. In addition, the metal terminal may not necessarily be a cladding material, and may be comprised with a normal metal plate according to the material of the plate-shaped member 2a. Since it is the same as that of 1st Embodiment U of the battery cover unit of this invention about another, the same number is attached | subjected to the same member and description is abbreviate | omitted.

Next, the figure of 3rd Embodiment U of the battery cover unit of this invention is demonstrated, FIG. 8 is sectional drawing of the principal part of 3rd Embodiment U2 of the battery cover unit of this invention, and FIG. 9 is a figure of the battery cover unit of this invention. It is an exploded perspective view of 3rd Embodiment U2.

As for 3rd Embodiment U2 of the battery cover unit of this invention, compared with 1st Embodiment U, the 2nd terminal piece 4e is extended and the 2nd through hole 4p is formed in the edge part vicinity. Moreover, this 2nd terminal piece 4e is not comprised by the cladding material but only by the nickel material. In addition, the battery cover plate 2 is provided with a third recessed portion 2h instead of the recessed portion 2g.

The insulating member 12 is formed of a molded product of synthetic resin such as PP (polypropylene) and PPS (polyphenylene sulfide), and forms a thin rectangular shape to form a rectangular rectangular hole 12b inward. A main body portion 12a to be formed, a first insulating portion 12c formed in a reverse convex shape downward from one end of the main body portion 12a, and an extension portion 12h formed in the center portion, and extending to the other end side. And a second insulator 12d formed and a third through hole 12e formed in the center of the second insulator 12d. Moreover, the 1st insulating part 12c has the guide part 12f formed one step lowered from the edge part of the two frames of the longitudinal direction of the main-body part 12a, and the protrusion which protrudes upward from the center part of this guide part 12f. It has (12g). That is, the insulating member 12 is the second insulating portion 12d having the extension portion 12h instead of the insulator 3d of the insulating member 3 used in the first embodiment U of the battery cover unit of the present invention. Is formed, and the 3rd through hole 12e is formed in this 2nd insulating part 12d.

And this insulating member 12 is accommodated in the accommodating part 2b of the plate-shaped member 2a of the battery cover 2, and the positioning of the insulating member 12 is performed reliably. At this time, similarly to the first embodiment U of the battery cover unit, the depth dimension of the second recessed portion 2f is designed to be approximately equal to or larger than the thickness dimension of the first insulation portion 12c, so that the first insulation portion Since 12c does not protrude from the second recess 2f, the battery cover unit U2 can be thinned. Moreover, since the depth dimension of the 3rd recessed part 2h is also designed substantially equal or larger than the thickness dimension of the 2nd insulated part 12d, the 2nd insulated part 12d will jump out of the 2nd recessed part 2h. Since it does not come out, the battery cover unit U2 can be thinned.

In the thermal switch 4 which is a protective device, the second terminal piece 4e of the second terminal portion T2 extends in the end direction, and a second through hole 4p is formed in the vicinity of the end. As described above, this second terminal piece 4e is made of only a nickel material. Moreover, you may comprise with aluminum, phosphor bronze, iron, etc. About the other part of the thermal switch 4 which concerns on this embodiment, it is equivalent to the thermal switch 4 used for 1st Embodiment U of a battery cover unit, and is provided in the battery cover body 2 by the through hole 4f. The projection 12g of the accommodated insulating member 12 penetrates through and caulked, and the main body part 4a is accommodated in the 1st recessed part 2e through the rectangular hole 12b, and the thermal switch 4 is reliably ensured. It is fixed. When the thermal switch 4 is fixed in this way, the first, second, and third through holes 2d, 4p, 12e are brought into communication with each other.

In this way, the first, second and third through holes 2d, 4p and 12e communicated with each other are provided with a rivet 13, which is a holding means, through the gasket 6 and riveted by the second terminal piece 4e. (13) is caulked. And the rivet 13 and the 2nd terminal piece 4e are electrically conductive, and the 1st terminal piece 4d comprises an electrode. Moreover, the material of the rivet 13 is comprised with iron (nickel plating is performed). Moreover, you may comprise with aluminum, nickel, etc. Since other aspects are the same as those of the first embodiment U of the battery cover unit, the same members are assigned the same numbers, and description thereof is omitted. In addition, although the material of the battery cover body 2 is comprised from aluminum material, it does not necessarily need to be aluminum material, and other metals, such as nickel and iron (nickel-plated), may be sufficient. That is, in 3rd Embodiment U2 of the battery cover unit of this invention, since it is a structure which takes out an electrode from the battery cell 1 and the battery cover body itself, it is the electrode of the 1st terminal piece 4d, What is necessary is just to design so that the electrode of the battery cell 1 and the battery cover body 2 may differ. And in this embodiment, the 1st terminal piece 4d which consists of nickel materials comprises a positive electrode, and the battery cell 1 and battery cover body 2 which consist of aluminum materials comprise a negative electrode.

In addition, the battery cover units U, U1, and U2 of the present invention have the configuration as described above and are used as described above, but are not limited to the above description, and, of course, are related to the battery cover unit of the present invention as a modification. As shown in FIG. 10, which is a perspective view showing a modified example of the battery cover body, a convex portion 2k protruding upward from the plate member 2a may be formed along the outer peripheral portion. This convex part 2k protrudes past the thermal switch 4, and when the battery B falls, since the impact force is applied to this convex part 2k first, the thermal switch 4 can be protected. .

In addition, in the above description, in order to prevent the thermal switch 4 from being wetted with water, the form using the waterproof sheet 5 has been described. However, a sealant made of a synthetic resin having viscosity may be applied to achieve waterproofing. In addition, although the above description demonstrated the example used for a lithium ion secondary battery, it goes without saying that it can be used for all the batteries.

The battery cover unit of the present invention includes a battery cover body and a thermal switch, the thermal switch is mounted on the battery cover body, and the thermal switch and the battery cover body are integrated so that the reference temperature does not change well. Since the thermal switch is used, a highly reliable battery cover unit can be provided. In addition, since the thermal switch and the battery cover body are integrated, it is not necessary to wind the lead wire, so that a battery cover unit having good mass productivity and assembling property and having an inexpensive battery can be provided. In addition, since the thermal switch is unitized with the battery cover body, a battery cover unit that contributes to the miniaturization of the battery can be provided.

In addition, the thermal switch of the battery cover unit of the present invention has a main body portion provided with a blocking means for interrupting the converter, and a first recess is formed in the battery cover body, and the main body portion of the thermal switch is accommodated in the first recess. Since the thermal switch can be easily attached to the battery cover, the battery cover unit having good assembly properties and mass productivity can be provided. In addition, since the main body portion of the thermal switch is accommodated in the first concave portion of the battery cover body, the battery cover unit can be thinned.

Moreover, the thermal switch of the battery cover unit of this invention has a 1st terminal part which protrudes from the main-body part connected to the interruption | blocking means, the 1st insulating part is arrange | positioned between a 1st terminal part and a battery cover body, and the 1st battery cover body has a 1st terminal part. Since it is set as the structure in which the 2nd recessed part which accommodates an insulation part is formed, a 1st insulation part can be easily attached and assembly property becomes favorable. Moreover, since the 1st insulating part is accommodated in a 2nd recessed part, thickness reduction of a battery cover unit can be realized.

Moreover, since the 1st insulating part of the battery cover unit of this invention was formed from the molded article of synthetic resin, and this 1st insulating part is equipped with the guide part which positions the width direction of a 1st terminal part, the 1st terminal part is attached, Since the precision is improved, a highly reliable battery cover unit can be provided.

In addition, the first insulating portion of the battery cover unit of the present invention has a projection while the first terminal portion has a through hole, and the thermal switch is attached to the first insulating portion by caulking the protrusion penetrated through the through hole. Therefore, the position of a 1st terminal part can be determined reliably, and a highly reliable battery cover unit can be provided.

Moreover, since the 1st terminal part of the battery cover unit of this invention has a bending piece, and the edge part of the bending piece in which a bending line is located is located on the 1st insulating part, it is reliably made of a 1st terminal piece and a battery cover body. Since insulation can be aimed at, a highly reliable battery cover unit can be provided.

Moreover, since the thermal switch of the battery cover unit of this invention has a 2nd terminal piece and this 2nd terminal part is welded to the battery cover body, since the thermal switch and the battery cover body were electrically connected and integrated, welding was carried out. The battery cover unit can be provided by a simple means, which contributes to assembly and mass production. In addition, since the lead wire does not need to be wound, the cost can be reduced.

The battery cover of the battery cover unit of the present invention is formed of an aluminum material, and the second terminal portion is formed of a clad material having at least an aluminum layer, and the second terminal portion is formed in a state in which the aluminum layer is opposed to the battery cover. Since the thermal switch and the battery cover body are electrically connected and integrated by welding to the battery cover body, the second terminal portion can be directly connected to the battery cover body made of aluminum, so that the assemblability and mass productivity are good. A lightweight battery cover unit can be provided. In addition, since the lead wire does not need to be wound, a battery cover unit capable of forming a battery having good mass productivity and assemblability and having low cost can be provided.

In addition, the thermal switch of the battery cover unit of the present invention has a connection terminal, and the battery cover body is formed with a storage recess communicating with the first recess, while the storage recess is provided with a metal terminal, and the connection terminal is accommodated. The battery cover unit can be provided by a simple means for connecting the connection terminal to the metal terminal because it is stored in the concave portion and is laminated to the metal terminal and connected to the metal terminal, thereby contributing to assembly productivity. do. In addition, since the lead wire does not need to be wound, the cost can be reduced. In addition, the metal terminals are stored in the storage recesses, which contributes to thinning.

In addition, the battery cover body of the battery cover unit of the present invention is formed of an aluminum material, the metal terminal is formed of a clad material, the metal terminal is welded and mounted on the battery cover body, the surface opposite to the welded surface of the metal terminal Since the connection terminals are laminated and connected to each other, the connection terminals can be connected to the battery cover body made of aluminum material through the metal terminals, thereby providing a lightweight battery cover unit with good assembly and mass productivity. have.

Moreover, since the electrode part penetrates and is arrange | positioned in the battery cover body of the battery cover unit of this invention, and this electrode part and the battery cover body were insulated, it is a battery provided with the electrode part which has an electrode different from a battery cover body. Since the cover unit can be provided, the degree of freedom of wiring can be ensured when the battery is mounted on the electronic device side.

Moreover, since the insulation of the electrode part of the battery cover unit of this invention and a battery cover body is comprised by the insulator, and the 1st insulated part and the insulator were comprised, and it is set as the insulating member, what is necessary is just to attach an insulating member, A battery cover unit having good granularity and mass productivity can be provided.

In addition, since the electrode part of the battery cover unit of the present invention constitutes a holding means, and the insulating member and the battery cover body are fixed by the electrode part, the electrode part also serves as the holding means, so that the space efficiency is improved and the battery cover is improved. Contribute to miniaturization of the unit. In addition, since the number of parts is small, an inexpensive battery cover unit can be provided.

In addition, the thermal switch of the battery cover unit of the present invention has a second terminal piece, a first through hole is formed in the battery cover body, a second through hole is formed in the second terminal part, and is held in the second through hole. Since the means is inserted into and fixed in a state where the second insulating portion is disposed between them, the thermal switch and the battery cover unit are integrated in the state where the second terminal portion and the holding means are electrically connected. The battery cover unit can be provided by a simple means for connecting the battery cover body and the second terminal portion through insertion of the means, contributing to assembly and mass production. In addition, since the lead wire does not need to be wound, the cost can be reduced.

In addition, since the holding means of the battery cover unit of the present invention is constituted by a rivet, and the end portion of the rivet is caulted to fix the second terminal portion and the battery cover body, the battery cover unit is a simple means of caulking the rivet. Can provide assembly, contribute to mass production.

Moreover, since the 3rd recessed part which accommodates a 2nd insulating part is formed in the battery cover body of the battery cover unit of this invention, a 2nd insulating part can be easily attached and assembly property becomes favorable. Moreover, since the 2nd insulating part is accommodated in the 3rd recessed part, thickness reduction of a battery cover unit can be realized.

In addition, a third through hole is formed in the second insulating portion of the battery cover unit of the present invention, and the holding means is inserted into the first, second, and third through holes so that the second terminal portion and the battery cover body are fixed. As a result, the space efficiency can be increased, which contributes to miniaturization of the battery cover unit.

In addition, since the first insulating portion and the second insulating portion of the battery cover unit of the present invention are integrally formed to form an insulating member, the insulating member can be attached to provide a battery cover unit having good assembly and mass productivity. Can be.

In addition, since the waterproof sheet or the sealant for waterproofing is formed on at least the main body portion of the thermal switch of the battery cover unit of the present invention, the thermal switch can be prevented from getting wet, thereby providing a highly reliable battery cover unit. Can provide.

Moreover, since the convex part was formed in the battery cover body of the battery cover unit of this invention, and this convex part protruded beyond the main body part of a thermal switch, since a convex part absorbs a shock, an impact is applied to a thermal switch well. Since the thermal switch operates normally without being lost, a highly reliable battery cover unit can be provided.

In addition, since the thermal switch is made of bimetal, the reference temperature does not change well even when the switch is switched by temperature change.

In addition, since the thermal switch is housed, it is protected from external shock.

In addition, by providing a safety valve around the thermal switch, the unitization becomes easy.

Claims (23)

A battery cover body made of metal which seals a battery cell used for the battery and shields the inside of the battery cell, and the first recess is formed; It is provided with the main body part provided with the interrupting | blocking means for interrupting a converter, and further provided with the thermosensitive switch which switches a switch at predetermined temperature, The thermal switch is mounted on the battery cover body, the thermal switch and the battery cover body are integrated, The main body part of the said thermal switch is accommodated in the 1st recessed part of the said battery cover body, The battery cover unit characterized by the above-mentioned. delete The method of claim 1, wherein the thermal switch has a first terminal portion which is connected to the blocking means and protrudes from the main body portion, A first insulating portion is disposed between the first terminal portion and the battery cover body, and the battery cover unit has a second recessed portion for accommodating the first insulating portion. 4. The battery cover unit according to claim 3, wherein the first insulating portion is formed of a molded product made of synthetic resin, and the first insulating portion is formed with a guide portion for positioning the width direction of the first terminal portion. 5. The thermal switch according to claim 4, wherein the first insulating portion formed of a molded article of the synthetic resin has a protrusion, and the first terminal portion has a through hole, and the thermal switch is operated by caulking the protrusion inserted into the through hole. 1 A battery cover unit, wherein the battery cover unit is mounted to an insulation unit. 4. The battery cover unit according to claim 3, wherein the first terminal portion has a bent piece, and an end portion of the bent piece where the bent line is located is located on the first insulating portion. 4. The thermosensitive switch according to claim 3, wherein the thermosensitive switch has a second terminal portion extending in a direction opposite to the first terminal portion, and the second terminal portion is welded to the battery cover body to electrically connect the thermal switch and the battery cover body. The battery cover unit which is electrically connected and integrated. The battery cover body according to claim 7, wherein the battery cover body is formed of an aluminum material, and the second terminal portion is formed of a clad material having at least an aluminum layer, and in the state in which the aluminum layer faces the battery cover body, 2. The battery cover unit of claim 2, wherein the thermal switch and the battery cover are electrically connected to each other by being welded to the battery cover. 4. The thermal switch according to claim 3, wherein the thermal switch has a connection terminal extending in a direction opposite to the first terminal portion, and the battery cover body is provided with a storage recess communicating with the first recess, and the storage recess portion. Is equipped with a metal terminal, And the connection terminal is accommodated in the housing recess, and is laminated on the metal terminal and connected to the metal terminal. 10. The battery terminal according to claim 9, wherein the battery cover body is formed of an aluminum material and the metal terminal is formed of a clad material having at least an aluminum layer, and the metal terminal is formed in a state in which the aluminum layer is opposed to the storage recess. Is welded to the battery cover, and the connection terminal is laminated and connected to a surface opposite to the surface on which the metal terminal is welded. 4. The battery cover unit according to claim 3, wherein an electrode portion is inserted through the battery cover body, and the electrode cover and the battery cover body are insulated from each other. 12. The battery cover unit according to claim 11, wherein the insulation between the electrode portion and the battery cover body is made of an insulator, and the first insulation portion and the insulator are integrated to form an insulation member. 13. The battery cover unit according to claim 12, wherein the electrode portion constitutes a holding means, and the insulating member and the battery cover body are fixed by the electrode portion. 4. The thermal switch of claim 3, wherein the thermal switch has a second terminal portion extending in a direction opposite to the first terminal portion, and a first through hole is formed in the battery cover, and a second through hole is formed in the second terminal portion. Is formed, The holding means is inserted through the first and second through holes, and the second terminal portion and the battery cover body are fixed in a state where a second insulating portion is disposed between them, and the second terminal portion and the holding means are electrically The battery cover unit, wherein the thermal switch and the battery cover body are integrated in a conductive state. 15. The battery cover unit according to claim 14, wherein said holding means is constituted by a rivet, and end portions of the rivet are caulked to fix the second terminal portion and the battery cover body. 15. The battery cover unit according to claim 14, wherein a third recessed portion for accommodating the second insulation portion is formed in the battery cover body. 15. The method of claim 14, wherein the second insulating portion is formed with a third through hole, the holding means is inserted through the first, second, third through holes, the second terminal portion and the battery cover body is fixed The battery cover unit, characterized in that. 15. The battery cover unit according to claim 14, wherein the first insulating portion and the second insulating portion are integrated to form an insulating member. The battery cover unit according to claim 1, wherein a watertight sheet or a watertight sealant is formed on at least a main body of the thermal switch. The battery cover unit according to claim 1, wherein a plurality of convex portions protruding toward the side in which the thermal switch is accommodated are formed in the battery cover body, and the convex portions protrude past the main body of the thermal switch. The battery cover unit of claim 1, wherein the thermal switch is made of bimetal. 22. The battery cover unit according to claim 21, wherein the thermal switch is housed so as not to protrude from the surface of the battery cover body. The battery cover unit according to claim 22, wherein a safety valve is formed around the thermal switch.