JP2012038529A - Battery, and vehicle and electrical device equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery having a current path breaking mechanism which ensures low conductive resistance in a normal state as well as reliable operation during internal pressure rise, and also to provide a device and the like equipped with the battery.SOLUTION: A battery of the present invention comprises: an outer package can; an electrode body which is housed in the outer package can; a sealing plate 5 which seals an opening of the outer package can; an external terminal 6 which is on the outer side of the sealing plate 5; a collector terminal 16 which is connected to an electrode of the electrode body; a deformation member 14 which is connected to the external terminal 6 and is arranged to face the collector terminal 16; and a caulking part 13 which seals to cover a space of the deformation member 14 on the opposite side to the collector terminal 16. The space partitioned by the deformation member 14 and the caulking part 13 is in a vacuum or depressurized state. A surface of the deformation member 14 on the collector terminal 16 side is faced to an internal space of the outer package can. In a normal state, the deformation member 14 is in contact with the collector terminal 16, but when an internal pressure of the outer package can rises, the deformation member 14 deforms in a direction away from the collector terminal 16.

Description

  The present invention relates to a battery in which a power generation element is housed in an exterior member. More specifically, the present invention relates to a battery provided with a mechanism for interrupting a current path when the internal pressure rises, and a vehicle and an electric device equipped with the battery.

  Conventionally, batteries have been used in a wide range of products ranging from small devices such as mobile phones and notebook computers to large devices such as electric vehicles and hybrid vehicles. Some of such batteries have a structure in which a power generation element is housed in an exterior member. In a battery with this structure, the internal pressure may increase depending on the charge / discharge status. Therefore, safety measures are taken when the internal pressure rises.

  An example of such a safety measure is that described in Patent Document 1. This document describes a battery having a “pressure-sensitive deformation element”. In the battery of this document, the pressure-sensitive deformation element is provided in the middle of a conductive path between the external electrode terminal and the electrode body. As a result, when the internal pressure rises, the pressure-sensitive deformation element is deformed to block the conductive path. This forcibly stops the charge / discharge reaction and suppresses further increase in internal pressure. Alternatively, the internal pressure can be released to the outside by deformation of the pressure-sensitive deformation element.

  And in the battery of the literature, a hole is formed in the external electrode terminal. This hole is a hole for communicating the space in contact with the outer surface of the battery of the pressure-sensitive deformation element to the outside of the battery. With this hole, the space in contact with the surface of the pressure-sensitive deformation element on the battery outer side is always at atmospheric pressure. According to this document, this prevents the pressure in the space from rising and preventing the deformation when the pressure-sensitive deformation element is deformed.

JP 2008-66255 A

  However, the above-described conventional technique has the following problems. That is, in the battery of this document, the atmospheric pressure is always applied to the space because of the above-mentioned holes. For this reason, the pressure-sensitive deformation element is deformed against the atmospheric pressure on the outer surface side. Therefore, in the battery design disclosed in this document, the shape and thickness of the pressure-sensitive deformation element must be determined based on this assumption. This has been a restriction on the design of the pressure-sensitive deformation element.

  For this reason, the conductive resistance of the pressure-sensitive deformation element during normal operation cannot be lowered sufficiently. This is because the pressure-sensitive deformation element of this document must be easily deformable in order to reliably deform against the atmospheric pressure when the internal pressure increases. That is, it is necessary to have a thin plate thickness. For this reason, the conductive resistance was high. If the plate thickness is increased, the conductive resistance can be lowered, but this does not sufficiently deform when the internal pressure rises, and the conductive path cannot be interrupted. In addition, the internal pressure leaks from the other seals, and the pressure-sensitive deformation element may become more difficult to deform.

  The present invention has been made to solve the above-described problems of the prior art. That is, the problem is to provide a battery having a current path interruption mechanism that achieves both a low conductive resistance during normal operation and a reliable operation when the internal pressure rises, and a vehicle and an electric device equipped with the battery. is there.

  The battery of the present invention made for the purpose of solving this problem includes an exterior member having an opening, an electrode body housed in the exterior member and having a positive electrode and a negative electrode, a sealing plate for sealing the opening, and an outer side of the sealing plate. A battery having an external terminal provided therein, a current collecting member connected to the positive electrode or the negative electrode, a pressure sensitive member connected to the external terminal and disposed facing the current collecting member, and a pressure sensitive member A space partition member that seals and covers the space on the opposite side of the current collecting member, and the space defined by the pressure sensitive member and the space partition member is vacuum, and the pressure sensitive member is a surface on the current collecting member side. Faces the internal space of the exterior member, and is in contact with the current collecting member in a normal state, and when the internal pressure of the exterior member rises, it deforms away from the current collecting member. Alternatively, the space partitioned by the pressure-sensitive member and the space partition member may be a space that is decompressed to a pressure lower than atmospheric pressure.

  In the battery of the present invention in a normal state, the current collector plate is connected to the electrode. Further, the current collecting member and the pressure sensitive member are in contact with each other. Further, the pressure sensitive member and the external terminal member are connected. Thereby, an energization path from the electrode to the external terminal member is formed. Here, the pressure-sensitive member has a surface on the side of the current collecting member facing the internal space of the exterior member, while the surface on the opposite side defines one sealed space together with the space partition member. The sealed space is in a vacuum or a reduced pressure state. For this reason, when the internal pressure of the exterior member increases, the pressure sensitive member is deformed in a direction away from the current collecting member, and the energization path is interrupted. Here, since the sealed space is in a vacuum or in a reduced pressure state, a pressure opposite to the deformation of the pressure-sensitive member is hardly applied. For this reason, it is not necessary to make the pressure-sensitive member extremely thin or to release the air from the atmosphere by closing the sealed space.

  The present invention is also directed to a vehicle having the battery of the present invention and a motor that receives power supply from the battery and generates at least a part of driving force. The vehicle may be any vehicle that uses electric energy from a battery for all or part of its power source, such as an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric wheelchair, Examples include electric assist bicycles and electric motorcycles.

  Furthermore, the present invention is also directed to an electric device having the battery of the present invention and an operating unit that operates by receiving power supply from the battery. The electrical device may be any device equipped with a battery and using it as at least one energy source. For example, a personal computer, a mobile phone, a battery-powered electric tool, an uninterruptible power supply, etc. Various home appliances, office equipment, and industrial equipment.

  According to the present invention, there are provided a battery having a current path interruption mechanism that achieves both a low conductive resistance during normal operation and a reliable operation during an increase in internal pressure, and a vehicle and an electric device equipped with the battery.

It is a perspective view of the battery which concerns on embodiment. It is an exploded view which shows the components group which comprises the connection part of the external terminal and electrode plate in the battery which concerns on embodiment. It is a perspective view of the state which assembled the components group shown in FIG. It is sectional drawing of the connection structure of the lower part of an external terminal in the battery which concerns on embodiment. It is sectional drawing which shows the state at the time of the internal pressure rise of the connection structure shown in FIG. It is a see-through | perspective perspective view which shows the vehicle carrying the battery which concerns on embodiment. It is a perspective view which shows the hammer drill carrying the battery which concerns on embodiment.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the accompanying drawings. In this embodiment, the present invention is applied to the battery shown in FIG. A battery 1 in FIG. 1 is formed by enclosing an electrode winding body 3 in an outer container 2. The outer container 2 includes an outer can 4 and a sealing plate 5. The electrode winding body 3 is obtained by winding positive and negative electrode plates with a separator interposed therebetween. In addition to the electrode winding body 3, an electrolytic solution is also enclosed in the outer container 2. The battery 1 is provided with external terminals 6 and 7 protruding from the sealing plate 5. The external terminals 6 and 7 are respectively connected to the positive and negative electrode plates of the electrode winding body 3 inside the outer container 2. Note that either of the external terminals 6 and 7 may be positive or negative.

  FIG. 2 shows a group of components constituting a connection structure between the external terminal 6 and the electrode plate of the electrode winding body 3 in the battery 1. The parts shown in FIG. 2 are, from the top in the figure, external terminals 6, bolts 8, external gasket 9, sealing plate 5, seal rubber 10, internal upper gasket 11, cap 12, caulking part 13, deformation member 14, internal bottom Gasket 15 and current collecting terminal 16. Among these, the metal conductive parts that become the current path of charge / discharge in the battery 1 are the external terminal 6, the bolt 8, the crimping part 13, the deformable member 14, and the current collecting terminal 16. The seal rubber 10 is a rubber part. The outer gasket 9, the inner upper gasket 11, and the inner lower gasket 15 are resin parts having a certain degree of flexibility.

  First, among the components in FIG. 2, a metal conductive component serving as a charge / discharge current path will be briefly described. As described above, a total of five types of parts such as the external terminal 6, the bolt 8, the caulking part 13, the deformable member 14, and the current collecting terminal 16 correspond to this. The external terminal 6 is a plate-shaped member formed into a crank shape, and has a lower step portion 61, an intermediate portion 62, and an upper step portion 63. A hole 64 is formed in the lower step portion 61, and a hole 65 is formed in the upper step portion 63. The bolt 8 has a shaft portion 81 and a head portion 82.

  The caulking part 13 has a base part 131 and a cylindrical part 132. The cylindrical portion 132 is provided so as to protrude from the center of one surface of the base portion 131, and a through hole 133 is formed at the center thereof. The deformable member 14 is a rectangular flat plate-like member, and a stepped portion 141 is formed at the center thereof. The stepped portion 141 is convex downward. The current collecting terminal 16 has a connection portion 161 and a contact portion 162. The connection portion 161 is a portion that is actually connected to the electrode plate of the electrode winding body 3, and the contact portion 162 is a portion that contacts the deformation member 14.

  Next, the rubber parts among the parts shown in FIG. 2 will be briefly described. The external gasket 9 has a block portion 91 and a flat plate portion 92. A bottomed hole 93 is formed in the block portion 91, and a hole 94 is formed in the flat plate portion 92. The seal rubber 10 is a flat ring member. The internal upper gasket 11 is a substantially rectangular flat plate-like component as a whole.

A hole 111 is formed in the center of the inner upper gasket 11. The size of the hole 111 is slightly larger than the outer diameter of the seal rubber 10. On the four sides of the inner upper gasket 11, flanges 112 are formed downward. A protrusion 113 is formed on the outer surface of the long side (the front surface in FIG. 2) of the collar portion 112. The protrusion 113 is also formed on the outer surface of the portion that is the back surface in FIG. The inner lower gasket 15 has a flat box-shaped base 151 and a wall 152 formed so as to extend upward from its long side. A through hole 153 is formed in the base 151 in a direction connecting the long sides. A hole 156 is formed in the wall portion 152.

  In addition to these, a sealing plate 5 and a cap 12 appear in FIG. The sealing plate 5 is a part of the outer container 2 as described above. As apparent from FIG. 2, a hole 51 is formed in the sealing plate 5. The cap 12 is for closing the through hole 133 of the caulking part 13.

  FIG. 3 shows a state where the parts group shown in FIG. 2 is assembled. In the state of FIG. 3, the sealing plate 5 and the external gasket 9 are overlapped, and a hole 94 is disposed immediately above the hole 51. And the head part 82 of the volt | bolt 8 is inserted in the bottomed hole 93 of the external gasket 9, and the axial part 81 has faced up. Further, the external terminal 6 is disposed on the external gasket 9. The external terminal 6 is arranged so that the hole 64 overlaps the hole 94 of the external gasket 9 and the hole 65 is positioned on the bottomed hole 93. Therefore, the shaft portion 81 of the bolt 8 protrudes upward through the hole 65.

  The cylindrical part 132 of the crimping part 13 is inserted from below the sealing plate 5. The cylindrical portion 132 protrudes upward through the hole 51 of the sealing plate 5, the hole 94 of the external gasket 9, and the hole 64 of the external terminal 6. However, the cylindrical portion 132 is crimped to the external terminal 6 by the protruding portion being pushed outward in the radial direction. As a result, the caulking part 13 is fixed at the position shown in FIG. Further, the external gasket 9, the external terminal 6, and the bolt 8 are also fixed at the positions shown in FIG. The cap 12 closes the through hole 133 of the caulking part 13.

  Below the sealing plate 5, the internal upper gasket 11 is sandwiched between the base 131 of the caulking component 13 and the sealing plate 5. Of course, the cylindrical portion 132 passes through the hole 111 of the inner upper gasket 11. Although not visible in FIG. 3, the seal rubber 10 is also sandwiched between the base 131 of the crimping part 13 and the sealing plate 5.

  An inner lower gasket 15 is also disposed on the lower surface side of the sealing plate 5. The inner lower gasket 15 is disposed so that the base portion 131 and the wall portion 152 cover the base portion 131 of the caulking part 13 from below. The inner lower gasket 15 is fixed at the position shown in FIG. 3 by the hole 156 being hooked on the protrusion 113 of the inner upper gasket 11. Further, the deformable member 14 is sandwiched between the base portion 131 of the caulking part 13 and the base portion 151 of the inner lower gasket 15. Further, the contact portion 162 of the current collecting terminal 16 is inserted into the through hole 153 of the inner lower gasket 15.

  FIG. 4 shows a cross-sectional view of the connection structure shown in FIGS. 4 is a cross-sectional view of the central portion in the thickness direction of the battery 1 of FIG. 1 as viewed in the direction of arrow A in FIG. In the following, with reference to FIG. 4, the parts not understood in FIGS. 2 and 3 will be described. A sleeve portion 95 is provided on the edge portion of the hole 94 of the external gasket 9 downward. The sleeve 95 enters the hole 51 of the sealing plate 5. As a result, the crimping component 13 and the sealing plate 5 are reliably insulated. The seal rubber 10 is located in the hole 111 of the internal upper gasket 11. The cylindrical portion 132 of the caulking part 13 also penetrates the seal rubber 10.

  The base 131 of the caulking part 13 has a shape in which the lower surface side is opened, although it is a box in itself. However, as can be seen from FIG. 4, the edge portion 142 of the deformable member 14 is joined to the lower end portion 134 in the completed state. Thereby, the space 17 is partitioned by the base 131 and the deformable member 14. The space 17 is connected to the through hole 133 inside the cylindrical portion 132, but the uppermost end is closed by the cap 12. The deformable member 14 is thinner than the caulking part 13. However, it is not so thin that lack of electrical conductivity becomes a problem.

  Holes 154 and 155 are formed on the upper and lower surfaces of the base 151 of the inner lower gasket 15. Through the hole 154 on the upper surface, the stepped portion 141 of the deformable member 14 and the contact portion 162 of the current collecting terminal 16 are in contact with each other, and both are joined. Here, the bonding strength between the stepped portion 141 and the contact portion 162 is weak. Therefore, it separates when the internal pressure increases as will be described later. However, there is no hindrance to normal conduction. In addition, as a method of weakly joining the stepped portion 141 and the contact portion 162, for example, welding is performed after providing a marking on both or one of the joining surfaces. The joint area is small by the stamp, and the joint strength is lowered.

  Note that the contact portion 162 and the base portion 151 are not so closely attached. For this reason, the space 18 between the deformation member 14, the contact part 162, and the base 151 is not an airtight space. When an internal pressure rise described later occurs inside the battery 1, the pressure in the space 18 also rises. That is, the surface of the deformable member 14 on the contact portion 162 side faces the internal space of the battery 1. Needless to say, the contact portion 162 or the base portion 151 may be appropriately provided with a hole or notch so that the space 18 and the internal space of the battery 1 are more reliably communicated.

  In the above connection structure, the space 17 is evacuated. Even if it is a vacuum, a vacuum that is evacuated by a simple exhaust pump such as a rotary pump is sufficient, and it does not have to be a so-called high vacuum. Alternatively, it may be just reduced to a pressure equal to or lower than one-fourth of the atmospheric pressure. In the battery 1, the above connection structure may be employed only for the external terminal 6, or may be employed for both the external terminals 6 and 7.

  The manufacturing procedure of the battery 1 having the above connection structure is simply as follows. First, the inner upper gasket 11 and the seal rubber 10 are mounted on the surface of the base part 131 of the caulking part 13 on the cylindrical part 132 side. At this point, of course, the cylindrical portion 132 of the crimping part 13 has not been crimped yet.

  On the other hand, an external gasket 9 is overlaid on the sealing plate 5. Of course, the hole 51 and the hole 94 are overlapped, and the sleeve portion 95 is inserted into the hole 51. The block portion 91 is positioned on the inner side in the width direction of the sealing plate 5 than the hole 51. Then, after the bolt 8 is set in the bottomed hole 93 of the block portion 91, the external terminal 6 is set. Of course, the hole 64 is overlapped with the hole 94 while passing the shaft portion 81 of the bolt 8 through the hole 65.

  Then, the cylindrical portion 132 of the caulking part 13 to which the inner upper gasket 11 and the seal rubber 10 are attached is pierced from below into the hole 51 of the sealing plate 5. As a result, the cylindrical portion 132 passes through the sealing plate 5, the external gasket 9, and the external terminal 6. Here, by caulking the cylindrical portion 132, the parts assembled so far are fixed to each other. Further, the caulking part 13 and the external terminal 6 are made conductive. After crimping, the crimping part 13 and the deformation member 14 are joined.

  In addition to the above, a current collecting terminal 16 is attached to the inner lower gasket 15. That is, the contact portion 162 of the current collecting terminal 16 is inserted into the through hole 153 of the base portion 151 of the inner lower gasket 15. Then, the inner lower gasket 15 to which the current collecting terminal 16 is attached is attached to the above-described one. That is, the wall portion 152 of the inner lower gasket 15 is applied to the side surface of the flange portion 112 of the inner upper gasket 11, and the hole 156 is hooked on the protruding portion 113. As a result, the deformable member 14 and the current collecting terminal 16 come into contact with each other through the hole 154 of the inner lower gasket 15. Therefore, the deformable member 14 and the current collecting terminal 16 are joined. This joint is a weak joint as described above.

  Then, the space 17 is evacuated or decompressed, and then the space 17 is sealed with the cap 12. As a result, the state shown in FIG. 3 is completed. After that, as usual, the connecting portion 161 of the current collecting terminal 16 is connected to the electrode winding body 3, the electrode winding body 3 is accommodated in the outer casing 2, and the outer casing 2 is sealed with the sealing plate 5. What is necessary is just to inject | pour a liquid.

In the battery 1, as is clear from the above, the energization path from the electrode winding body 3 to the external terminal 6 is as follows.
Electrode winding body 3 → current collecting terminal 16 → deformable member 14 → caulking part 13 → external terminal 6
Of these, only the current collecting terminal 16 and the deformable member 14 have a low bonding strength and can be separated depending on the state of the battery 1 as described above. In other parts, the two members are securely joined to the extent that they are not easily separated.

  Here, in the battery 1 as well, the internal pressure may increase as described in the background art column depending on the use situation. The operation of the connection structure in such a case will be described. As described above, when the internal pressure increases, the pressure in the space 18 in FIG. 4 also increases. On the other hand, the pressure in the space 17 does not rise and is almost constant at the original pressure. For this reason, the deformable member 14 is in a state where the upper side is low pressure and the lower side is high pressure, and is pressed upward, that is, from the space 18 side to the space 17 side. Therefore, the deformable member 14 is deformed so as to curve upward in FIG. That is, the deformable member 14 deforms in response to an increase in internal pressure.

  Therefore, as shown in FIG. 5, the deformable member 14 and the current collecting terminal 16 are separated from each other. Thereby, the energization path from the electrode winding body 3 to the external terminal 6 is interrupted. Thus, the current is forcibly stopped, and the power generation reaction in the electrode winding body 3 is strongly suppressed. This prevents further deterioration of the situation. Even when the deformable member 14 is deformed, the caulking part 13 hardly deforms. This is because the caulking part 13 is thicker than the deformable member 14.

  Here, since the space 17 is in a vacuum or reduced pressure state, the following effects are obtained. That is, the deformation operation of the deformation member 14 is reliable. This is because the pushing back from the space 17 side hardly works. The deformation of the deformable member 14 as described above means that the volume of the space 17 is reduced. This is certainly a factor that increases the pressure in the space 17 according to Boyle Charles' law. However, since the space 17 is in a vacuum or reduced pressure state, the range of the pressure increase is only slight. For this reason, the deformable member 14 is reliably deformed by increasing the internal pressure as designed, and the current is interrupted.

  If the space 17 is sealed at atmospheric pressure, the pressure in the space 17 will rise significantly when the deformable member 14 is deformed. This attempts to restore the shape of the deformable member 14 to its original shape. For this reason, the deformable member 14 is pushed back and cannot be smoothly deformed. For this reason, it is necessary to take measures such as making the deformable member 14 extremely thin and easy to deform, or stopping the sealing with the cap 12 and opening the space 17 to the atmosphere. In the former, the deformable member 14 has a high resistance, and the large current performance of the battery 1 is lowered. Even in the latter case, the atmospheric pressure is constantly applied to the space 17, and it remains the resistance factor against the deformation of the deformable member 14. In the latter case, further, water or the like enters the space 17 from the outside, which may cause corrosion. On the other hand, in this embodiment, there is no such fear.

  As described in detail above, in the battery 1 according to the present embodiment, the contact portion 162 that is a part of the current collecting terminal 16 and the deformable member 14 connected to the external terminal 6 are in contact with each other at normal times. When the internal pressure is increased, the deformation member 14 is deformed to be separated. Here, the deformable member 14 is located between a space 18 that is affected by the increase in internal pressure and a space 17 that is not affected by the increase in internal pressure. The space 17 is in a vacuum or a reduced pressure state. Therefore, a reliable current interruption operation is performed without making the deformable member 14 extremely thin or opening the space 17 to the atmosphere. As a result, the battery 1 that achieves both the reliability of the current interrupting operation and the performance corresponding to a large current is realized.

  The battery 1 of this embodiment can also be used by being mounted on a vehicle 100 as shown in FIG. A plurality of vehicles 100 are mounted. Specifically, vehicle 100 is a hybrid vehicle that is driven by using engine 140, front motor 120, and rear motor 130 in combination. The vehicle 100 includes a vehicle body 190, an engine 140, a front motor 120, a rear motor 130, a cable 150, an inverter 160, and an assembled battery 110. The assembled battery 110 includes a plurality of batteries 1 and supplies power to the front motor 120, the rear motor 130, and the like. Depending on the relationship between the battery capacity and the vehicle size, a configuration in which only one battery 1 of this embodiment is mounted may be used.

  The battery 1 of this embodiment can also be used by being mounted on a hammer drill 200 as shown in FIG. The hammer drill 200 is a battery-mounted device on which a battery pack 210 including the battery 1 of this embodiment is mounted. The hammer drill 200 further includes a main body 220 and an operation unit 230. Electric power is supplied from the battery pack 210 to the operating unit 230. The battery pack 210 is detachably accommodated in the bottom 221 of the main body 220 of the hammer drill 200.

  Note that this embodiment is merely an example, and does not limit the present invention. Therefore, the present invention can naturally be improved and modified in various ways without departing from the gist thereof.

  For example, the battery 1 itself may be anything as long as it has a structure in which an electrode body is sealed in a container, and may be any type such as a lithium ion battery or a nickel metal hydride battery. The electrode body is not limited to a wound body in which electrode plates are wound, but may be a laminated body in a flat stack. The metal type of the metal member may be any metal type that is generally used according to the type of battery, and other types may be used as long as the operation of the battery itself is not hindered. The shape of the container is not limited to a flat shape, and may be a cylindrical shape.

  Further, in the above embodiment, the caulking part 13 has a function of partitioning the space 17 together with the deformable member 14 and a function of forming a part of the energization path from the deformable member 14 to the external terminal 6. That is not essential. These functions may be assigned to separate members. Moreover, in the said embodiment, although the deformation | transformation member 14 is located in the exterior container 2 completely, this is not essential. It is sufficient that at least the surface on the contact portion 162 side faces the internal space of the outer container 2.

DESCRIPTION OF SYMBOLS 1 Battery 3 Electrode winding body 4 Exterior can 5 Sealing plates 6, 7 External terminal 13 Caulking part (space partition member)
14 Deformation member (pressure sensitive member)
16 Current collecting terminal 100 Vehicle 110 Battery pack 120 Front motor 130 Rear motor 200 Hammer drill 210 Battery pack 230 Operating section

Claims (4)

An exterior member having an opening;
An electrode body housed in the exterior member and having a positive electrode and a negative electrode;
A sealing plate for sealing the opening;
In a battery having an external terminal provided outside the sealing plate,
A current collecting member connected to the positive electrode or the negative electrode;
A pressure sensitive member connected to the external terminal and disposed facing the current collecting member;
A space partition member that seals and covers the space on the opposite side of the current collecting member in the pressure sensitive member;
The space partitioned by the pressure sensitive member and the space partition member is a vacuum,
The pressure sensitive member is:
The current collecting member side surface faces the internal space of the exterior member;
In normal condition, it is in contact with the current collecting member,
When the internal pressure of the exterior member increases, the battery is deformed in a direction away from the current collecting member. An exterior member having an opening;
An electrode body housed in the exterior member and having a positive electrode and a negative electrode;
A sealing plate for sealing the opening;
In a battery having an external terminal provided outside the sealing plate,
A current collecting member connected to the positive electrode or the negative electrode;
A pressure sensitive member connected to the external terminal and disposed facing the current collecting member;
A space partition member that seals and covers the space on the opposite side of the current collecting member in the pressure sensitive member;
The space partitioned by the pressure sensitive member and the space partition member is a pressure lower than atmospheric pressure,
The pressure sensitive member is:
The current collecting member side surface faces the internal space of the exterior member;
In normal condition, it is in contact with the current collecting member,
When the internal pressure of the exterior member increases, the battery is deformed in a direction away from the current collecting member. A vehicle comprising: the battery according to claim 1; and a motor that receives power supply from the battery and generates at least a part of driving force. An electric apparatus comprising: the battery according to claim 1; and an operation unit that operates by receiving power supply from the battery.

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