JP2000164181A - Battery pack, battery pack housing, adhesive support member, and method of manufacturing the same - Google Patents

Abstract

(57) [Problem] To provide a battery pack, a battery pack housing, and an adhesive support member capable of satisfactorily bonding a battery to a housing. SOLUTION: In a battery pack containing a predetermined number of batteries inside a housing composed of a first housing 21 and a second housing 35, the battery pack follows and closely adheres to the outer peripheral surface of the battery 24. An adhesive support member 25 is provided to be bonded to the first housing 21 or the second housing 35, and the battery is bonded to the first housing 21 or the second housing 35 via the adhesive support member 25. It is characterized by that.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack for fixing a battery to a housing, a housing for a battery pack, an adhesive support member, and a method of manufacturing the same.

[0002]

2. Description of the Related Art As shown in FIG. 5, a battery pack used as a battery has a first housing 1, a second housing 2,
And a battery 3. In this battery pack, a double-sided tape 5 is attached to the whole or a part of the bottom wall surface 4 of the first housing 1, and thereafter, as shown in FIG.
Is pressed and adhered and fixed to the double-sided tape 5.

After the bonding and fixing are completed, the second housing 2 is fixed to the first housing 1 with an adhesive or the like.
Form a battery pack.

[0004]

In many cases, the battery 3 has a cylindrical shape. Therefore, as shown in FIG. 6, the battery 3 is located near the ridge line on the side surface of the cylinder in contact with the first housing 1. It is in a state of being adhered only by.

Here, when the battery pack receives an impact such as a drop collision, the first housing 1 and the second housing 2 may be separated because the battery 3 moves in the pack by inertia. In order to prevent the battery pack from being separated, the battery 3 is firmly fixed to the first housing 1. When the first housing 1 receives an impact, distortion occurs. When the distortion propagates from the impact point to the entire housing of the battery pack, the distortion of the housing is caused by the presence of the highly rigid battery 3 in the bonding area. It will be suppressed. Therefore, the strain stagnates when it enters the bonding area. That is, in the case of the conventional bonding method, the strain is not propagated to the entire battery pack, but concentrates near the impact point. For this reason, a large deformation occurs only near the impact point, and the battery pack is broken.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a battery pack, a battery pack housing, and an adhesive support capable of maintaining a battery in a housing. An object is to provide a member and a method of manufacturing the member.

[0007]

According to a first aspect of the present invention, a predetermined number of batteries are housed in a housing composed of a first housing and a second housing. The battery pack is provided with an adhesive support member that is in close contact with the outer peripheral surface of the battery and that is adhered to the first housing or the second housing. A battery pack, which is bonded to a housing or a second housing.

According to a second aspect of the present invention, the adhesive support member has a crush allowance that elastically deforms when the battery is adhesively supported on the first casing or the second casing. 1. The battery pack according to 1.

According to a third aspect of the present invention, the adhesive supporting member is formed so as to have a convex portion formed by a predetermined dimension from the crushing allowance, and the convex portion extends in a protruding direction. 3. The battery pack according to claim 2, wherein the battery pack is formed symmetrically with respect to the battery, and the shape of both side surfaces of the protrusion is formed so as to follow the shape of the outer peripheral surface of the battery.

According to a fourth aspect of the present invention, there is provided a battery pack housing formed by joining a first housing and a second housing, wherein the bottom wall of the first housing or the second housing is provided. The battery pack is characterized in that an adhesive support member that can be in close contact with the outer peripheral surface of the battery and that does not adhere in the vicinity of the closest portion between the battery and the bottom wall is provided in the portion. It is a housing.

According to a fifth aspect of the present invention, there is provided an adhesive support member which is in close contact with an outer peripheral surface of a battery and adhesively supports the battery.
A crushing allowance formed at a predetermined height, and a protrusion protruding from the crushing allowance, are formed symmetrically with respect to a center line extending in the protruding direction, and both sides are formed on the outer peripheral surface of the battery. And a projection formed so as to follow the shape.

According to a sixth aspect of the present invention, there is provided a method of manufacturing an adhesive supporting member which is in close contact with the outer peripheral surface of a battery and which adhesively supports the battery, wherein a crushing allowance formed at a predetermined height and a normal to the crushing allowance are provided. A plurality of projections are formed symmetrically with respect to a center line extending in the direction, and are provided with a plurality of projections that are continuously formed in a concave shape having a shape on both side surfaces following the outer peripheral shape of the battery. Manufacturing an adhesive support member, comprising: a molding step of forming a structure by injection molding; and a cutting step of cutting an adhesive support member having the crush allowance and the convex portion from the continuous structure. Is the way.

[0013] As a result of taking the above measures, the following effects occur. According to the first aspect of the invention, the battery adheres to the outer peripheral surface of the battery and adheres to the first casing or the second casing, and the battery is held by the first casing or the second casing. Is done.

According to the second aspect of the invention, the crushing margin is elastically deformed to hold the battery, the adhesion is improved, and the battery is supported.

According to the third aspect of the present invention, the battery is closely held on both side surfaces of the projection. That is, the adjacent batteries are juxtaposed and closely held.

According to the fourth aspect of the present invention, the battery is held by the adhesive support member provided on the bottom wall of the first housing or the second housing.

According to the fifth aspect of the present invention, when the adhesive support members are arranged side by side at a desired position, the adjacent batteries are held with good adhesion.

According to the sixth aspect of the present invention, an adhesive support member is formed by cutting out a continuous structure formed by injection molding.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a side sectional view showing the structure of a battery pack 20 according to the present invention. The battery pack 20 has a first housing 21 made of a resin such as polycarbonate, ABS, or acrylic. The first housing 21 has a bottom wall portion 22 formed in a planar shape, and a peripheral wall portion 23 stands upright at a peripheral edge of the bottom wall portion 22.

When the battery 24 is mounted and fixed to the first housing 21, the battery 24 is mounted so that the side ridge of the battery 24 contacts the inner wall of the peripheral wall portion 23 or has a slight gap.

An adhesive support member 25 is attached and fixed to the bottom wall 22 of the first housing 21. The adhesive support member 25 is made of a material such as urethane foam having a low density and being easily deformed. This adhesive support member 25
Is a shape having a squashing margin 26 from the bottom surface A by a predetermined dimension as shown in FIG. Here, a portion formed to protrude from the crushing allowance 26 is referred to as a convex portion 27.

The protruding portion 27 is formed such that the outer peripheral side surface 29 follows the cylindrical shape of the outer peripheral side surface 29 of the battery 24 as shown in FIG. That is, the outer peripheral side surface 29 of the convex portion 27 is formed in an arc shape as shown in the front view. For this reason, the battery 24 is formed so as to contact the entire side surface of the adhesive support member 25 when the battery 24 is brought into contact.

In the case of forming the adhesive support member 25, as shown in FIG. 2, first, the plurality of adhesive support members 25 are not separated, but are rectangular members (continuous structure) 28 which are continuously formed in a substantially corrugated shape. Is formed, for example, by injection molding. The rectangular member 28 has a semicircular concave portion 30 formed so as to follow the outer peripheral surface shape of the battery 24 and to follow the outer peripheral surface shape.
Many are formed in a continuous state. Then, the rectangular member 28 is cut off to form the adhesive support member 25. When the adhesive support member 25 is cut off, the substantially wave-shaped apex portions 31 of the rectangular member 28 become 1 The separation is performed so as to be included in the two adhesive support members 25. At this time, in order to facilitate the propagation of the impact, it is desirable to cut off such that the thin middle portion 32 located between the top portions 31 is removed.

As described above, the adhesive support member 25 is formed. The adhesive support member 25 is provided on the first housing 21 at a predetermined pitch so that the batteries 24 are provided adjacent to each other. The bottom wall 22 is bonded and fixed using an adhesive. In this case, the adhesive support member 25 is bonded and fixed so that a gap 33 exists between the adjacent adhesive support members 25 as shown in FIG. The gap 33 is formed by removing the intermediate portion 32 when the rectangular member 28 is separated. That is, a portion corresponding to the intermediate portion 32 becomes the gap 33.

Here, the first gap is formed so that the gap 33 exists.
3A, an adhesive is first applied to the outer peripheral side surface 29 of the adhesive support member 25, and the batteries provided side by side so as to be adjacent to each other as shown in FIG. The adhesive support member 25 is inserted into the gap portion 24 by applying a pressing force.

Then, the battery 24 is attached to the adhesive support member 25.
Is adhered to the bottom surface A of the adhesive support member 25, and the adhesive support member 25 to which the battery 24 is adhered is pressed against the first housing 21 as shown in FIG. Pressure is applied to fix the adhesive.

By the pressing and fixing, the outer peripheral surface of the battery 24 is provided so that the portion existing in the gap 33 sinks. In this case, the crushing allowance 26 is elastically deformed by pressing, and the elastic deformation of the crushing allowance 26 causes the adhesive support member 25 and the first
Is firmly adhered to the housing 21.

In this embodiment, the battery 24 bonded to the adhesive support member 25 is a secondary battery such as a nickel cadmium battery, a nickel hydride battery, or a lithium ion battery, and is sealed inside the housing. It is possible to use it repeatedly even if it is. However, a battery other than the secondary battery may be used.

After the battery 24 is bonded to the bonding support member 25, the second housing 35 is bonded to the first housing 21. The second housing 35 is also formed of a resin such as plastic similarly to the first housing 21, and the first housing 21 is provided with an adhesive or ultrasonic vibration, for example. Adhered to.

The battery pack 20 having the above configuration
According to this, the adhesive support member 25 is provided so as to follow and adhere to the outer peripheral side surface 29 of the battery 24, and the adhesive support member 25 is adhered and fixed at a predetermined pitch to the bottom wall portion 22 of the first housing 21, and then the battery 24 is adhered. The battery 24 is fixedly attached to the first housing 21 by being tightly fixed to the support member 25.

Therefore, unlike the conventional case, the battery 24 is not adhered to the first housing 21 only at the ridge line, and the
And a large area can be contacted with the housing 21.
Therefore, the battery 24 can be stably fixed.

Also, since the battery 24 is not fixed to the first housing 21 by the adhesive support member 25 instead of being contacted only by the ridge line, the first contact is not contacted by line but by surface contact.
Is fixed to the housing 21. For this reason, even if an impact due to, for example, dropping is applied to the battery pack 20, the battery 24 and the first housing 21 are not in a line contact state as in the related art, but are in contact with the entire contact support member 25. For,
Propagation of distortion in the first housing 21 due to the impact does not stop at the line contact portion, and the distortion is reduced in the first housing 21.
To the whole.

Therefore, the strain can be absorbed by the large area of the first housing 21 without absorbing the strain by only a part of the first housing 21.

As described above, by absorbing the strain in a large area, it is possible to prevent the strain from concentrating near the impact point and to generate a large deformation.
Is less likely to be destroyed.

Further, the adhesive support member 25 has a crushing allowance 26, and the crushing allowance 26 is provided so as to be elastically deformable when the battery 24 is held. It is possible to hold it closely.

Further, a convex portion 27 is formed so as to protrude from the crushing allowance 26, and the battery 24 is supported by the outer peripheral side surface 29 of the convex portion 27 so that the batteries 24 are adjacent to each other. Even in the case where the batteries 24 are arranged side by side, it is possible to adhere and support these batteries 24 in rows.

The adhesive support member 25 is formed by first injection molding the rectangular member 28, and after this injection molding, the rectangular member 28
Are formed at the same time by separating them, so that the manufacturing cost of the adhesive support member 25 can be reduced.

Although the embodiment of the present invention has been described above, the present invention can be variously modified. This is described below.

In the above embodiment, the adhesive support member 25 for absorbing the impact is provided for the battery pack 20 to absorb the impact. However, the present invention is applicable to a product having a similar structure other than the battery pack 20. It may be applied as a shock absorbing structure.

In the above embodiment, the first housing 2
Although the configuration in which the adhesive support member 25 is provided for each unit has been described, a configuration in which the adhesive support member 25 is attached to the second housing 35 may be employed. In this case, the first housing 2
The configuration in which the adhesive support member 25 is provided on both the first and second housings 35 may be employed, or the configuration in which the adhesive support member 25 is provided only on the second housing 35 may be employed.

Further, in the above embodiment, the adhesive support member 25 is fixed by using an adhesive, but the adhesive support member 25 is not fixed by using an adhesive, but is fixed by using a double-sided tape. Alternatively, the configuration may be as follows.

In the above embodiment, after the battery 24 is bonded to the adhesive support member 25, the adhesive support member 25 to which the battery 24 is bonded is pressed and fixed to the first housing 21. The adhesive support member 25 is adhesively fixed to the first housing 21 before the second housing 35 is fixed.
May be attached to the first housing 21 so as to be freely detachable, and a battery pack housing without the battery 24 may be formed.

In this case, if the battery 24 is bonded and fixed to the battery pack casing later, the battery 24 can be supported by surface contact instead of line contact as described above.

In addition, various modifications can be made without departing from the scope of the present invention.

[0046]

As described above, according to the present invention,
Since the battery is closely attached to the first housing or the second housing along the outer peripheral surface of the battery by the adhesive support member, it is possible to support the battery in a surface contact state instead of a line contact state. Therefore, even if an impact is applied to the first housing or the second housing, the propagation of the strain due to the impact does not stop at the contact portion of the battery, and the strain is easily propagated to the entire housing. . Therefore, since the strain is absorbed by a larger area without absorbing the distortion by only a part of the first housing or the second housing, the first housing or the second housing is not easily broken. .

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a configuration of a battery pack according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a rectangular member according to the embodiment.

3A and 3B are diagrams showing a method of bonding and fixing the battery according to the embodiment to a first housing, wherein FIG. 3A shows a state where the battery is bonded and fixed to an adhesive support member, and FIG. Shows a state in which the adhesive support member bonded and fixed to the first housing is bonded.

FIGS. 4A and 4B are diagrams showing the shape of the adhesive support member according to the embodiment, wherein FIG. 4A is a front view and FIG. 4B is a side view.

FIG. 5 is a diagram showing a structure of a conventional battery pack.

FIG. 6 is a diagram showing a state of adhesion of a battery to a conventional first housing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 ... Battery pack 21 ... 1st housing | casing 24 ... Battery 25 ... Adhesive support member 26 ... Crushing allowance 27 ... Convex part 28 ... Rectangular member 29 ... Outer peripheral side surface 33 ... Gap 35 ... 2nd housing | casing

Claims (6)

[Claims] 1. A battery pack comprising a predetermined number of batteries housed inside a housing comprising a first housing and a second housing, wherein the battery pack is in close contact with an outer peripheral surface of the battery, and An adhesive support member is provided to be bonded to the first housing or the second housing, and the battery is bonded to the first housing or the second housing via the adhesive support member. Battery pack. 2. The battery pack according to claim 1, wherein the adhesive supporting member has a crushing allowance that elastically deforms when the battery is adhesively supported on the first casing or the second casing. 3. The adhesive support member is formed so as to have a convex portion formed by a predetermined dimension from the crushing allowance, and the convex portion has a symmetrical shape with respect to a center line extending in the protruding direction. The battery pack according to claim 2, wherein the battery pack is formed and the shape of both side surfaces of the convex portion is formed so as to follow the shape of the outer peripheral surface of the battery. 4. A battery pack housing formed by joining a first housing and a second housing, wherein a bottom wall of the first housing or the second housing is provided with a battery. An enclosure for a battery pack, wherein an adhesive support member that can adhere to the outer peripheral surface and does not adhere to the vicinity of the closest part between the battery and the bottom wall is provided by adhesion. 5. An adhesive support member which is in close contact with the outer peripheral surface of the battery and adhesively supports the battery, wherein a crush allowance formed at a predetermined height and a protrusion formed from the crush allowance and extending in the projecting direction. An adhesive support member, comprising: a convex portion formed symmetrically with respect to a center line, and formed so that the shape of both sides thereof follows the shape of the outer peripheral surface of the battery. 6. A method of manufacturing an adhesive supporting member which is in close contact with an outer peripheral surface of a battery and adhesively supports the battery, wherein a crushing allowance formed at a predetermined height and a center extending in a normal direction of the crushing allowance. Injection molding is performed to form a continuous structure in which a plurality of projections are formed in a symmetrical shape across the line, and a plurality of projections formed in a concave shape whose side surfaces follow the shape of the outer peripheral surface of the battery are continuously provided. A method of manufacturing an adhesive support member, comprising: a forming step of forming; and a cutting step of cutting an adhesive support member having the crush allowance and the convex portion from the continuous structure.