JP2016076305A - Fixing mechanism of electrode terminal of battery, battery pack, and method for fixing electrode terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing mechanism of an electrode terminal of a battery which has high reliability in electrical connection of the electrode terminal and mechanical fixation and whose assembly work is comparatively simple, and also to provide a battery pack containing the fixing mechanism, and a method for fixing the electrode terminal.SOLUTION: A fixing mechanism 1 of an electrode terminal 9 of a battery 8 includes: a lower side abutting part 3; and an upper side abutting part 4 which is provided so as to be opposite to the lower side abutting part 3 and pressed down toward the lower side abutting part 3. A connection part 4a electrically connected to the electrode terminal 9 is provided in at least one of the upper side abutting part 4 and the lower side abutting part 3. The lower side abutting part 3 is supported by an elastic member 7 or a surface 3a of the lower side abutting part 3 opposite to at least the upper side abutting part 4 is formed of an electric material.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a battery electrode terminal fixing mechanism, a battery pack, and a method of fixing an electrode terminal.

  A secondary battery used as a power source for portable electronic devices, vehicles, and households usually has a battery element having a configuration in which a positive electrode and a negative electrode are alternately and repeatedly overlapped through a separator, and an outer case that houses the battery element and an electrolyte solution including. And the electrode terminal (positive electrode terminal and negative electrode terminal) respectively connected to the positive electrode and the negative electrode extends to the outside of the outer case. This battery functions by connecting electrode terminals to an external connection member. As an example, as shown in FIG. 9, the electrode terminal 22 of the battery 20 is sandwiched by an alligator clip 21, and the metal alligator clip 21 in contact with the electrode terminal 22 is electrically connected to an external circuit or the like via a wiring cable 23. There is a configuration to connect.

In the configuration having the crocodile clips 21, since it is necessary to manually open and close each crocodile clip 21, the work time is long and the workability is poor. Although not shown in detail in FIG. 9, the alligator clip 21 has a plurality of teeth, and each tooth substantially contacts the electrode terminals 22 at a plurality of positions of the electrode terminals 22. Since gripping is common, gripping reliability is low. The electrode terminal 22 cannot be gripped by surface contact by such an alligator clip 21, and it is difficult to hold the electrode terminal 22 in parallel. Furthermore, the gripping force by the alligator clip 21 may further decrease due to some external force or vibration applied to the battery 20 or long-term use, and the reliability of contact with the electrode terminal 22 may be further lowered. In that case, there is a possibility that the electric resistance increases and the performance of the battery 20 is lowered, and there is a risk that arc discharge occurs in the alligator clip 21. And although the alligator clip 21 can hold | grip the electrode terminal 22, it cannot hold | maintain the battery 20 whole and cannot prevent the inclination of a battery element, etc. Rather, when the gripping force by the alligator clip 21 acts on only a part of the battery 20, there is a possibility that the battery element may be displaced or lifted. If the gripping force of the alligator clip 21 is increased, the electrode terminal 22 sandwiched between the alligator clip 21 may be damaged. Moreover, since there exists a possibility that the part of the excess length of the wiring cable 23 connected to the alligator clip 21 may be caught in other members, it must be drawn around carefully and handling is troublesome.
Patent Literature 1 discloses a thin secondary battery charge / discharge device having clip-type connection terminals. This clip-type connection terminal has the same problem as the alligator clip shown in FIG.

  As a configuration for solving the problems of the configuration having a clip, Patent Documents 2 to 4 disclose a connector having an elongated plate-like upper and lower clamping plates and a spring. In this connector, the electrode terminal is inserted into the gap in a state in which the gap between the upper clamp plate and the lower clamp plate is widened by pushing down the lower clamp plate against the biasing force of the spring by a pressing member or manually. Then, the pressure is released, and the gap between the upper and lower clamping plates is narrowed by the biasing force of the spring, and the electrode terminal is clamped between the upper and lower clamping plates. A metal portion is formed at least on the lower clamping plate, and the clamped electrode terminal is electrically connected to the metal portion.

  In Patent Document 5, a pair of damping materials each having a connection portion are disposed on a planar fixed base portion, and the fixed base portion is bent so as to sandwich the electrode terminals of the battery. An assembled battery having a configuration in which both damping materials are in contact with electrode terminals from above and below is disclosed.

  Patent Document 6 discloses a battery module in which an electrode terminal is held between movement restriction members positioned above and below the electrode terminal. In this battery module, the electrode terminal is electrically connected to a bus bar provided separately from the movement restricting member by screwing or welding.

JP 2000-58135 A JP 2009-300193 A JP 2011-60817 A JP 2011-69744 A JP2013-243061A JP 2004-55348 A

  In the configurations disclosed in Patent Documents 2 to 4, when the upper and lower clamping plates and the electrode terminals sandwiched between them are all located in parallel, it is possible to hold the electrode terminals satisfactorily. is there. However, it is difficult to keep them all in parallel. If the upper clamping plate 24 and the lower clamping plate 25 are positioned parallel to each other and the electrode terminal 22 is inclined with respect to the upper clamping plate 24 and the lower electrode clamping plate 25 as shown in FIG. Rather than biased. That is, since the upper clamping plate 24 and the lower clamping plate 25 are in contact with the electrode terminal 22 not by surface contact but by point contact or line contact, the reliability of holding the electrode terminal 22 is low. Further, there is a possibility that damage such as bending may occur in the electrode element 22 due to the biased force. In addition, some external force or vibration applied to the battery 20 or long-term use may further reduce the holding force by the sandwiching plates 24 and 25, thereby increasing the electrical resistance and reducing the performance of the battery 20. There is a risk of arc discharge occurring in both sandwiching plates 24 and 25. In order to correct the electrode terminal 22 to be in a parallel posture by the upper clamping plate 24 and the lower clamping plate 25, an excessive force must be applied to the electrode terminal 22, and as a result, the electrode terminal 22 There is a greater risk of deformation and misalignment.

  Further, since the lower clamping plate 25 is movable with respect to the upper clamping plate 24 for insertion and clamping of the electrode terminals 22, the upper clamping plate 24 and the lower clamping plate 25 are always in an exactly parallel posture. It is difficult to keep on. That is, the lower clamping plate 25 is guided by a support column or the like, but the lower clamping plate 25 is parallel to the upper clamping plate 24 by the amount of play necessary to enable the lower clamping plate 25 to move. There is a possibility of deviation. If the upper clamping plate 24 and the lower clamping plate 25 are not parallel, a biased force is applied to the upper surface and the lower surface of the electrode terminal 22, and the electrode terminal 22 may be deformed or displaced. These problems are the same even if the upper clamping plate 24 is movable with respect to the lower clamping plate 25.

  As described above, in the inventions described in the cited documents 2 to 4, it is difficult to firmly hold the electrode terminal 22 without causing deformation or misalignment, and accordingly, the performance of the battery 20 due to an increase in electrical resistance. Reduction may occur.

  In the invention described in Patent Document 5, vibration applied from the outside of the assembled battery is prevented from being transmitted to the thin battery by the damping material. However, Patent Document 5 does not consider holding the upper stage clamping plate, the lower stage clamping plate, and the electrode terminals in parallel, so that the reliability of electrical connection and mechanical fixing of the electrode terminals is sufficient. It's not expensive. The damping material provided for preventing vibration must be provided above and below the electrode terminal.

  In the invention described in Patent Document 6, the electrode terminal is held by the movement restricting member made of an elastic material, and the electrical and mechanical connection is performed by screwing or welding. According to this configuration, the certainty of holding is high, but the configuration is complicated and the assembling work is very complicated, and it is difficult to disassemble and reassemble when a defect occurs.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a battery electrode terminal fixing mechanism, a battery pack including the same, and an electrode with high reliability of electrical connection and mechanical fixing of the electrode terminals and relatively easy assembly work. And a method of fixing a terminal.

  The electrode terminal fixing mechanism of the battery of the present invention includes a lower contact portion and an upper contact portion that is provided so as to face the lower contact portion and is pushed down toward the lower contact portion. At least one of the upper contact portion and the lower contact portion is provided with a connection portion that is electrically connected to the electrode terminal. The lower contact portion is supported by an elastic member, or at least the surface of the lower contact portion that faces the upper contact portion is formed of an elastic material.

  The battery pack of the present invention includes a battery element formed by superposing a positive electrode and a negative electrode with a separator interposed therebetween, an exterior case containing the battery element, and one end connected to the positive electrode or the negative electrode and the other end outside the exterior case The battery having the electrode terminal extending in the direction and the fixing mechanism configured as described above. The electrode terminal of the battery is sandwiched between the upper contact plate and the lower contact plate and is in contact with and electrically connected to the connection portion.

  According to the present invention, the method of fixing the battery electrode terminal by the lower contact portion and the upper contact portion that faces the lower contact portion and is pushed down toward the lower contact portion is the lower contact portion. Disposing the electrode terminal on the surface of the portion facing the upper contact portion, and pressing the upper contact portion into contact with the electrode terminal and pressing the electrode terminal against the lower contact portion. The lower abutting portion is supported by an elastic member so that its posture can be changed, or at least the surface facing the upper abutting portion is formed of an elastic material. In the step of pressing the electrode terminal against the lower contact portion, the electrode terminal is electrically connected to the connection portion provided on at least one of the upper contact portion and the lower contact portion, and the lower contact portion At least the surface facing the upper contact portion is changed in posture according to the pressing force applied from the upper contact portion via the electrode terminal, and the electrode terminal is sandwiched between the upper contact portion and the lower contact portion. To do.

  According to the present invention, the electrode terminal fixing mechanism for the battery, the battery pack including the same, and the electrode terminal having high reliability of electrical connection and mechanical fixing of the electrode terminal and relatively easy assembling work, A fixing method can be provided.

It is a schematic perspective view of the test | inspection apparatus containing the fixing mechanism of the electrode terminal of this invention. It is a side view which shows the principal part of the fixing mechanism of the electrode terminal shown in FIG. It is a side view which shows the principal part of the fixing mechanism of the electrode terminal of related technology. It is a side view which shows the principal part of the modification of the fixing mechanism of the electrode terminal shown in FIG. It is a side view which shows the principal part of the other modification of the fixing mechanism of the electrode terminal shown in FIG. It is a schematic plan view which shows the principal part of the further another modification of the fixing mechanism of the electrode terminal shown in FIG. It is a disassembled perspective view and principal part sectional drawing of a battery pack containing the fixing mechanism of the electrode terminal of this invention. It is principal part sectional drawing of the modification of the battery pack shown in FIG. It is a schematic perspective view of the test | inspection apparatus containing the fixing mechanism of the electrode terminal of related technology. It is a side view which shows the principal part of the fixing mechanism of the electrode terminal of related technology.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows an inspection apparatus including a battery electrode terminal fixing mechanism 1 according to a first embodiment of the present invention. The fixing mechanism 1 includes a substrate 2, a lower contact portion 3 provided on the substrate 2, and an upper contact portion 4 provided so as to face the lower contact portion 3. Yes. The upper contact portion 4 is attached to the rotating body 5, and the operating portion 6 for rotating the rotating body 5 is attached to the rotating body 5. Therefore, the upper contact portion 4 can be pushed down toward the lower contact portion 3 by operating the operation portion 6 manually or by a driving means (not shown). The upper contact portion 4 is provided with a connection portion 4 a made of a metal foil or the like on the surface facing the lower contact portion 3. The connecting portion 4a is connected to an external circuit via the wiring cable 11. The lower contact portion 3 is disposed on the substrate 2 via a cushion material 7 made of an elastic member, for example, rubber.

  In the present embodiment, in order to perform electrical connection and mechanical fixation of the pair of electrode terminals 9 of the battery 8, the two lower contact portions 3 are arranged side by side, and the two upper sides facing each other. The contact part 4, the rotating body 5, and the operation part 6 are arranged.

A method for fixing the electrode terminal 9 by the fixing mechanism 1 will be described.
First, as shown in FIGS. 1 and 2, a gap is left between the upper contact portion 4 and the lower contact portion 3. Therefore, the battery 8 is placed on the substrate 2, and the electrode terminal 9 of the battery 8 is inserted into the gap between the upper contact portion 4 and the lower contact portion 3. Therefore, the operating unit 6 is operated to rotate the rotating body 5 and push the upper contact part 4 downward toward the lower contact part 3. Accordingly, the upper contact portion 4 contacts the electrode terminal 9 and presses the electrode terminal 9 against the lower contact portion 3. In this embodiment, since the cushion material 7 is elastically deformed, as shown in FIG. 2 (b), the lower contact portion 3 corresponds to the pressing force applied from the upper contact portion 4 via the electrode terminal 9. Change posture.

To explain this point, as shown in FIG. 2 (a), due to the difference in the rotation radius, the upper contact portion 4 has a portion with a short distance to the lower contact portion 3 (a portion with a small rotation radius). There is a portion with a long distance to the lower contact portion 3 (a portion with a large turning radius).
If the posture of the lower contact portion 3 does not change, as shown in FIG. 3, the upper contact portion 4 is biased against the electrode terminal 9 and the lower contact portion 3, and in some cases, The upper contact portion 4 includes a portion that contacts the electrode terminal 9 and the lower contact portion 3 and a portion that does not contact. As a result, the reliability of clamping and electrical connection of the electrode terminal 9 is lowered. If the upper contact portion 4 presses the electrode terminal 9 against the lower contact portion 3 with a larger force, a portion that does not contact the electrode terminal 9 and the lower contact portion 3 may occur in the upper contact portion 4. However, there is a possibility that the electrode terminal 9 is excessively bent and damaged.

  On the other hand, in this embodiment, since the lower contact portion 3 is supported by the cushion material 7, when the upper contact portion 4 presses the electrode terminal 9 against the lower contact portion 3, the cushion material 7 is elastic. The lower contact portion 3 is deformed and changes its posture in accordance with the upper contact portion 4. Specifically, as shown in FIG. 2B, the posture is changed so that the electrode terminal 9 and the surface 3a of the lower contact portion 3 are parallel to the upper contact portion 4, thereby suppressing the bias of force. To equalize. As a result, the upper contact portion 4 and the lower contact portion 3 are in surface contact with the electrode terminal 9, and as a result, the adhesion is good and the clamping reliability is increased. Furthermore, since the connection part 4a provided in the upper contact part 4 and the electrode terminal 9 are in surface contact, the reliability of electrical connection is high. Further, since the force applied from the upper contact portion 4 is absorbed to some extent by the elastic deformation of the cushion material 7, the risk of damage due to excessive force applied to the electrode terminal 9 is small.

  With this configuration, in the inspection apparatus shown in FIG. 1, the battery 8 is disposed on the substrate 1, the electrode terminal 9 is sandwiched between the upper contact portion 4 and the lower contact portion 3, and the connection portion 4a. And electrically connected. Then, voltage measurement and current measurement for examining the performance of the battery 8 can be performed with high accuracy by an external circuit connected to the electrode terminal 9 of the battery 8 via the connection portion 4a and the wiring cable 11.

  4 (a) and 4 (b) show a modified example of the fixing mechanism shown in FIG. 2, in which the lower contact portion 3 is formed by using a metal coil spring 10 as an elastic member instead of the rubber cushion material 7. FIG. The structure which supports is shown. In this modified example as well, when the cushion material 7 is used, when the upper contact part 4 presses the electrode terminal 9 against the lower contact part 3 as shown in FIG. The posture is changed so that the electrode terminal 9 and the surface 3 a of the lower contact portion 3 are parallel to the upper contact portion 4 by deformation. As a result, the upper contact portion 4 and the lower contact portion 3 and the electrode terminal 9 are in surface contact with each other and have good adhesion, and the clamping reliability and the electrical connection reliability are increased. Further, since the coil spring 10 absorbs the force, there is little risk that the electrode terminal 9 will be damaged by applying an excessive force. In the example shown in FIGS. 4A and 4B, the upper abutment portion 4 is difficult to abut on the lower abutment portion 4 at a portion close to the battery 8 (on the right side of the drawing) because the radius of rotation is large. Therefore, when the coil spring 10 that can be elastically deformed so that the side closer to the battery of the lower contact part 4 is positioned higher than the side far from the battery, the upper contact part 4 is connected to the electrode terminal 9 and the lower part. This is preferable because the side contact portion 3 can be contacted relatively evenly.

  FIGS. 5A and 5B show a configuration in which the lower contact portion 3 itself is made of an elastic material as still another modification of the fixing mechanism. In this modification, as shown in FIG. 5 (b), when the upper contact portion 4 presses the electrode terminal 9 against the lower contact portion 3, the lower contact portion 3 itself is elastically deformed, and the electrode terminal The posture is changed so that 9 and the surface 3 a facing the upper contact portion of the lower contact portion 3 are parallel to the upper contact portion 4. As a result, the upper contact portion 4 and the lower contact portion 3 and the electrode terminal 9 are in surface contact with each other and have good adhesion, and the clamping reliability and the electrical connection reliability are increased. In addition, since the force is absorbed to some extent by the elastic deformation of the lower contact portion 3 itself made of an elastic material, there is little risk that the electrode terminal 9 is damaged due to an excessive force. According to this configuration, there is no need to separately provide a member (such as the cushion material 7 and the coil spring 10) that supports the lower contact portion 3, and thus the configuration is simple and the manufacture is easy.

  Although not shown, the lower member that fixes the lower contact portion 3 to the substrate 2 is made of a rigid body, and the lower contact portion 3 that is located on the lower member and faces the upper contact portion 4 is made of an elastic material. A formed configuration may also be used. In that case, the lower contact portion 3 has a configuration that is substantially inverted from the configuration shown in FIG. 2, but the same effect as described above can be obtained.

  In the modification shown in FIGS. 6A and 6B, the connection portion 12 that is electrically connected to the electrode terminal 9 is provided not in the upper contact portion 4 but in the lower contact portion 3. The section 12 is composed of a plurality of divided pieces 12a (two in the configuration of FIG. 6A and four in the configuration of FIG. 6B). According to this configuration, even if the electrode terminal 9 is distorted, the divided pieces 12a can be displaced somewhat independently. Therefore, the reliability of the connection between the electrode element 9 and the connection portion 12 is improved. high. This configuration is particularly effective when the lower abutting portion 3 itself is made of an elastic material because the divided pieces 12a are easily displaced independently from each other.

  Although the embodiment shown in FIG. 1 can be incorporated in a battery fixing mechanism for measuring battery electrical characteristics and the like housed in a battery pack, the present invention is limited to such a configuration. Not. In the embodiment shown in FIG. 7, the present invention is applied to a battery pack (battery module) 13. As shown in an exploded view in FIG. 7A, the battery pack 13 includes a plurality of batteries 8 arranged in a plane on a battery housing 14, and the battery housing 14 includes an upper cover 15 and a lower cover. It is sandwiched between the body 16. Although not shown in FIG. 7 (a), as shown in FIG. 7 (b), the upper contact portion 4 having the connecting portion 4a is provided on the upper cover body 15 and the lower cover body 16 is provided with a cushioning material. Lower contact portions 3 supported by 7 are respectively provided. The connecting portion 4a can be electrically connected to the outside of the battery pack 13 by a wiring pattern (not shown). With this configuration, the reliability of the clamping and electrical connection of the electrode terminal 9 is high inside the battery pack 13, and the risk of the electrode terminal 9 being damaged is small.

  In the modification shown in FIG. 8, a function of stably holding the battery element 18 in the outer case 17 of the battery 8 is added to the configuration shown in FIGS. 7 (a) and 7 (b). The battery 8 constituting the battery pack 13 of the present embodiment has a configuration in which a battery element 18 that is a laminate of electrodes (positive electrode and negative electrode) and a separator is housed in an outer case 17 together with an electrolyte solution (not shown). The outer case 17 is made of a flexible film, and the flexible films covering the battery element 18 partially overlap each other, and the overlapped portions are joined to each other, thereby enclosing the battery element 18 and the electrolyte solution. Case 17 is complete. One end of the electrode terminal 9 is connected to the battery element 18 inside the outer case 17, and the other end extends to the outside of the outer case 17. In the modification shown in FIG. 8, the lower contact portion 3 and the cushion material 7 below the lower contact portion 3 are in contact with the joint portion 17a of the flexible film from below, and the battery element 18 of the battery element 18 is interposed via the flexible film. It extends to the battery 8 side (right side in FIG. 8) up to a position adjacent to the side end 18a.

According to this configuration, similarly to the configuration shown in FIG. 7, in the battery pack 13, the clamping and electrical connection of the electrode terminals 9 are highly reliable, and the risk of the electrode terminals 9 being damaged is small. Further, an additional effect is obtained in that the lateral displacement of the battery element 18 in the outer case 17 is suppressed by the lower contact portion 3 adjacent to the side end 18a of the battery element.
8 is not limited to the configuration shown in FIG. 8, and only the upper contact portion 4 or both the upper contact portion 4 and the lower contact portion 3 are in contact with the joint portion 17a of the flexible film, and The battery 8 may be extended to the battery 8 side (to the right in FIG. 8) to a position adjacent to the side end 18a of the battery element 18 through the flexible film.

  As described above, according to the present invention, the posture of the lower contact portion 3 can be changed in accordance with the force applied from the upper contact portion 4 via the electrode terminal 9. The electrode terminal 9 and the surface 3a of the lower contact portion 3 can all be held in parallel. Thereby, both the electrical connection and mechanical fixation of the electrode terminal 9 can be made highly reliable. Further, a part of the force applied from the upper contact portion 4 is absorbed by elastic deformation of a member (such as the cushion material 7 and the coil spring 10) that supports the lower contact portion 3 or the lower contact portion 3 itself. Therefore, it is possible to prevent the electrode terminal 9 from being damaged by applying an excessive force. Moreover, no screwing or welding is required for electrical connection and mechanical fixing of the electrode terminals 9, so that the construction and assembly work are relatively simple.

DESCRIPTION OF SYMBOLS 1 Battery electrode terminal fixing mechanism 2 Board | substrate 3 Lower side contact part 4 Upper side contact part 4a Connection part 7 Cushion material (elastic member)
8 Battery 9 Electrode terminal 10 Coil spring (elastic member)
12 connection part 12a division | segmentation piece 13 battery pack 17 exterior case 17a joining part 18 battery element 18a side edge part

Claims (12)

A battery electrode terminal fixing mechanism,
A lower contact portion, and an upper contact portion provided to face the lower contact portion and pushed down toward the lower contact portion,
At least one of the upper contact portion and the lower contact portion is provided with a connection portion that is electrically connected to the electrode terminal,
The lower contact portion is supported by an elastic member, or at least a surface of the lower contact portion facing the upper contact portion is formed of an elastic material.   When the upper contact portion is pushed down and the electrode terminal is pressed against the lower contact portion, at least a surface of the lower contact portion facing the upper contact portion is separated from the upper contact portion. The fixing mechanism according to claim 1, wherein the posture changes according to a pressing force applied via the electrode terminal.   The surface of the lower contact portion that faces the upper contact portion is parallel to the surface of the upper contact portion that faces the lower contact portion due to the change in posture. Fixing mechanism.   The fixing mechanism according to any one of claims 1 to 3, wherein the connection portion includes a plurality of divided pieces, and two or more of the divided pieces are in electrical contact with the electrode terminals. A battery element formed by superposing a positive electrode and a negative electrode with a separator interposed therebetween, an outer case housing the battery element, and one end connected to the positive electrode or the negative electrode and the other end extending outside the outer case The battery having the electrode terminals;
The fixing mechanism according to any one of claims 1 to 4,
Have
The battery pack, wherein the electrode terminal of the battery is sandwiched between the upper contact plate and the lower contact plate and is electrically connected in contact with the connection portion.   The battery pack according to claim 5, wherein the lower contact portion is provided on a substrate, and the battery element of the battery is disposed on the substrate. The outer case of the battery is made of a flexible film, and the flexible films partially overlap each other with the flexible film covering the battery element, and the overlapping portions are joined to each other. The outer case is configured,
The electrode terminal extends from the joint between the flexible films to the outside of the exterior case,
At least one of the upper contact portion and the lower contact portion is in contact with the joint portion of the flexible film, and the flexible film is placed on a side end portion of the battery element in the exterior case. The battery pack according to claim 5 or 6, which are adjacent to each other. A method of fixing an electrode terminal of a battery by a lower contact portion and an upper contact portion that faces the lower contact portion and is pushed down toward the lower contact portion,
Disposing the electrode terminal on a surface of the lower contact portion facing the upper contact portion;
Depressing the upper abutting portion to abut against the electrode terminal, and pressing the electrode terminal against the lower abutting portion;
Including
The lower contact portion is supported by an elastic member so that the posture can be changed, or at least a surface facing the upper contact portion is formed of an elastic material,
In the step of pressing the electrode terminal against the lower contact portion, the electrode terminal is electrically connected to a connection portion provided in at least one of the upper contact portion and the lower contact portion, and the lower A posture of at least a surface of the side contact portion facing the upper contact portion is changed according to a pressing force applied from the upper contact portion through the electrode terminal, so that the upper contact portion and the lower side are changed. A method of fixing an electrode terminal of a battery, wherein the electrode terminal is sandwiched by a contact portion.   In the step of pressing the electrode terminal against the lower contact portion, a surface of the lower contact portion that faces the upper contact portion is a surface that faces the lower contact portion of the upper contact portion. The method of fixing the electrode terminal of the battery according to claim 8, which is parallel. The connecting portion is composed of a plurality of divided pieces,
The battery electrode terminal according to claim 8 or 9, wherein two or more of the divided pieces are brought into contact with and electrically connected to the electrode terminal in the step of pressing the electrode terminal against the lower contact portion. how to. The battery includes a battery element in which a positive electrode and a negative electrode are overlapped via a separator, an outer case that houses the battery element, one end connected to the positive electrode or the negative electrode, and the other end extending to the outside of the outer case. And having the electrode terminal out,
The lower contact portion is provided on the substrate;
The battery according to any one of claims 8 to 10, wherein in the step of arranging the electrode terminals, the outer case is arranged on the substrate and the electrode terminals are placed on the lower contact portion. To fix the electrode terminals of the. The electrode case is formed by partially overlapping the flexible films in a state where the battery element is covered with a flexible film, and joining the overlapped portions to each other. Extending from the joint between the flexible films to the outside of the exterior case,
At least one of the upper contact portion and the lower contact portion is brought into contact with the joint portion of the flexible film, and the flexible film is disposed on a side end portion of the battery element in the exterior case. The method of fixing the electrode terminal of the battery of Claim 11 which makes it adjoin through.

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