WO2010095224A1

WO2010095224A1 - Battery, vehicle and apparatus using battery

Info

Publication number: WO2010095224A1
Application number: PCT/JP2009/052809
Authority: WO
Inventors: 粟野　直実; 貴司原山; 秀平石崎; 彦人山崎; 正人駒月
Original assignee: トヨタ自動車株式会社
Priority date: 2009-02-18
Filing date: 2009-02-18
Publication date: 2010-08-26

Abstract

Provided is a highly reliable battery which can be manufactured easily because the number of components of an electrode terminal member is small and wherein the resistance of the electrode terminal member does not increase easily even after long term use. Also provided is a vehicle equipped with the battery, and an apparatus using this battery. A battery comprises electrode terminal members (130, 140) each having an extension member (137) consisting of an element joint (131) and an externally arranged terminal (133), and a fastening member (135), wherein the element joint (131) consists of an element joint body (131e) and an inserting portion (131f), the externally arranged terminal (133) consists of a fixed portion (133e), an intermediate portion (133f) and an external joint (133g) arranged in Z-shape, the extension member (137) is formed by bending a metal plate material of a predetermined shape, and the element joint (131) and the externally arranged terminal (133) are formed integrally.

Description

Batteries, vehicles, and equipment using batteries

The present invention provides a power generation element, a battery case that accommodates the power generation element, an electrode terminal member that extends to the outside of the battery case while being connected to the power generation element, and an insulation that insulates the electrode terminal member from the battery case A battery comprising the member. Moreover, it is related with a vehicle provided with this battery, and a battery using apparatus provided with this battery.

Conventionally, a power generation element, a battery case that accommodates the power generation element, an electrode terminal member that is connected to the power generation element and extends to the outside of the battery case and used for connection to an external connection terminal, and the electrode terminal member A battery including an insulating member that insulates the battery case from the battery case is known. For example, Patent Document 1 discloses such a battery. FIG. 10 shows a longitudinal sectional view of the vicinity of the electrode terminal member 930 of the battery 900, and FIG. 11 shows an exploded perspective view of the electrode terminal member 930, the

insulating members

950, 960, 970, and the like.

The battery 900 includes a battery case 910 that houses a power generation element (not shown), an electrode terminal member 930 that extends to the outside of the battery case 910 while being connected to the power generation element, and the electrode terminal member 930 and the battery case 910. And a plurality of (three) insulating members (upper insulating member 950, seal rubber 960, and lower insulating member 970) that are interposed between and insulate them.
Among these, the battery case 910 includes a box-shaped case main body member (not shown) that houses the power generation element, and a case lid member 913 that closes the opening of the case main body member. A circular terminal insertion hole 913 h is formed in the case lid member 913, and the electrode terminal member 930 is inserted therethrough.

The electrode terminal member 930 includes three members, that is, an element connection member 931, an externally arranged terminal member 933, and a fastening member 935. These

members

931, 933, and 935 are separated from each other.
Among these, the element connection member 931 includes an element connection main body portion 931e, an insertion portion 931f, and a rivet portion 931g. The element connection main body 931e is located inside the battery case 910 and is connected to the power generation element. The insertion portion 931f is connected to the upper end (the upper end portion in FIGS. 10 and 11) of the element connection main body portion 931e, and fixes a terminal insertion hole 913h of the case lid member 913 and an external arrangement terminal member 933 to be described later. The portion 933e is inserted into the opening 933eh. The rivet portion 931g is connected to the upper end of the insertion portion 931f, is exposed to the outside of the battery, is crimped, and is in contact with the fixing portion 933e of the externally arranged terminal member 933 from above.

The externally arranged terminal member 933 is located on the case lid member 913, and includes a fixing portion 933e, an intermediate portion 933f, and an external connection portion 933g, and has a Z shape. The fixing portion 933e has an opening 933eh that passes through the fixing portion 933e, and is connected to the element connecting member 931 (rivet portion 931g) as described above. The fixing portion 933e has a plate shape extending along and parallel to the case lid member 913, and is fixed to the case lid member 913 via an upper insulating member 950 described later. The intermediate portion 933f is connected to the fixing portion 933e and has a plate shape extending upward (upward in FIGS. 10 and 11). The external connection portion 933g is connected to the intermediate portion 933f, has a plate shape extending in parallel with the case lid member 913, and is formed with a screw insertion hole 933gh penetrating through the plate.

The fastening member 935 is located on the case lid member 913 and includes a male screw portion 935e and a base portion 935f. The male screw portion 935e is formed with a male screw extending in a direction orthogonal to the case lid member 913, and is inserted into the screw insertion hole 933gh of the external connection portion 933g of the externally arranged terminal member 933. The base portion 935f is larger in diameter than the male screw portion 935e, and is located closer to the case lid member 913 than the male screw portion 935e and the external connection portion 933g.

The three

insulating members

950, 960, and 970 are separated from each other, and the element connecting member 931, the externally arranged terminal member 933, the fastening member 935, and the case lid member 913 that constitute the electrode terminal member 930 described above. After being formed separately, it is assembled.
Of these, the upper insulating member 950 is mainly located outside the battery case 910, between the fixing portion 933 e of the externally arranged terminal member 933 and the case lid member 913, and between the base portion 935 f and the case lid member 913 of the fastening member 935. Between the externally arranged terminal member 933 and the fastening member 935 and the case lid member 913. The upper insulating member 950 is also interposed between the insertion portion 931f of the element connection member 931 and the inner peripheral surface of the terminal insertion hole 913h of the case cover member 913, and the insertion portion 931f of the element connection member 931 and the case. The lid member 913 is insulated.

The seal rubber 960 has an annular shape, and the insertion portion 931f of the element connection member 931 is inserted therethrough. The seal rubber 960 is located inside the battery case 910 and is sandwiched between the case lid member 913 and the element connection main body 931e of the element connection member 931. Accordingly, the element connection main body 931e of the element connection member 931 and the case lid member 913 are sealed while being insulated.
The lower insulating member 970 is located inside the battery case 910, and is disposed on the radially outer side of the seal rubber 960, and is disposed between the case lid member 913 and the element connection main body 931e of the element connection member 931. . Thus, the element connection main body 931e of the element connection member 931 and the case lid member 913 are insulated.

JP 2008-192595 A

In the battery 900 described above, the electrode terminal member 930 is composed of three members (the element connecting member 931, the externally arranged terminal member 933, and the fastening member 935), and the number of parts tends to be large, so that the battery manufacturing process tends to be complicated. . In addition, since the element connecting member 931 and the externally arranged terminal member 933 are connected by caulking by the rivet portion 931g, the caulking is loosened by long-term use, and the contact resistance between them increases. There was a fear.

The present invention has been made in view of such a situation, and the number of parts of the electrode terminal member is small and the manufacture is easy, and the resistance of the electrode terminal member is not easily increased even when used for a long period of time. It aims at providing a high battery, a vehicle provided with this battery, and a battery using apparatus provided with this battery.

In order to achieve the above object, one aspect of the present invention includes a power generation element, a case main body member that has an opening and accommodates the power generation element, and a case lid member that closes the opening of the case main body member. A battery case, an electrode terminal member connected to the power generation element, and extending on the case lid member through a terminal insertion hole formed in the case lid member, and between the electrode terminal member and the case lid member An insulating member that insulates the battery, wherein the electrode terminal member has an extending member that extends from the inside of the battery case through the terminal insertion hole onto the case lid member, and the extension The member is an element connection part connected to the power generation element, and is located inside the battery case, connected to the power generation element, and connected to the element connection main body part. An element connecting portion including an insertion portion inserted into the terminal insertion hole of the lid member, and an externally arranged terminal portion located on the case lid member of the outside of the battery case, wherein the insertion of the element connecting portion A fixed portion fixed to the case lid member via the insulating member, an intermediate portion connected to the fixed portion and extending in a direction away from the case lid member, and An external connection terminal portion having a Z-shape including an external connection portion that is connected to the intermediate portion, extends along the case lid member, and has a screw insertion hole penetrating through the case lid member. The member is a battery formed by bending a single metal plate having a predetermined shape and integrally forming the element connecting portion and the externally arranged terminal portion.

In the battery described above, the electrode terminal member has an extending member including an element connecting portion and an externally arranged terminal portion, and the extending member is formed by bending a single metal plate having a predetermined shape, and the element connecting portion. And the externally arranged terminal portion is formed integrally. For this reason, an electrode terminal member has few parts compared with the conventional electrode terminal member, manufacture of a battery is easy, and can make a battery cheap. In addition, since the extending member composed of the element connecting portion and the externally arranged terminal portion is integrally formed, the resistance of the electrode terminal member is hardly increased even when used for a long time, and the reliability can be improved.

In addition, as the “power generation element”, for example, a winding type power generation element obtained by winding a positive electrode, a negative electrode, and a separator each having a long shape, and a plurality of positive electrodes, negative electrodes, and separators each having a predetermined shape are stacked. And a laminated power generation element.
Examples of the “battery case” include a rectangular battery case and a cylindrical battery case. Examples of the “terminal insertion hole” include a circular shape, an oval shape, an elliptical shape, a rectangular shape, a polygonal shape, and a shape obtained by combining these.
The “insulating member” may be insulated from one electrode terminal member by using a single insulating member, or may be insulated by using a plurality of insulating members.

Further, in the battery described above, the electrode terminal member further includes a fastening member positioned on the case lid member, and the fastening member extends in a form extending in a direction orthogonal to the case lid member. A male screw part that is inserted into the screw insertion hole of the member and has a male screw formed on the outer periphery thereof, and has a diameter larger than that of the male screw part, and is greater than the male screw part and the external connection part of the extension member. A battery having a base portion located on the case lid member side is preferable.

In the battery described above, the electrode terminal member is composed of an extending member including an element connecting portion and an externally arranged terminal portion, and a fastening member. Among these members, the extending member is a single metal plate having a predetermined shape. The element connecting portion and the externally arranged terminal portion are integrally formed by bending. For this reason, the electrode terminal member is composed of two members, that is, an extension member and a fastening member. The number of parts is small compared to the conventional electrode terminal member composed of three members, and the battery can be easily manufactured. Can be made cheaper. In addition, since the extending member composed of the element connecting portion and the externally arranged terminal portion is integrally formed, the resistance of the electrode terminal member is hardly increased even when used for a long time, and the reliability can be improved.

Furthermore, in the battery according to any one of the above, the insulating member includes at least the insertion portion of the element connection portion of the extension member and an inner peripheral surface of the terminal insertion hole of the case lid member. A battery comprising a single member with respect to one electrode terminal member interposed therebetween, and insulation and sealing between the element connecting portion and the case lid member being performed only by this insulating member Good.

In the conventional battery 900 described above, insulation and sealing between the element connecting member 931 and the case lid member 913 are performed using three insulating members (upper insulating member 950, seal rubber 960, and lower insulating member 970). . For this reason, since the number of parts of the insulating

members

950, 960, and 970 is large, the manufacturing process of the battery 900 tends to be complicated, and the battery 900 tends to be expensive.
On the other hand, in the battery described above, the insulating member is composed of a single member interposed between at least the insertion portion of the element connection portion of the extending member and the inner peripheral surface of the terminal insertion hole of the case lid member, Insulation and sealing between the element connecting portion and the case lid member are performed only by this insulating member. Therefore, as compared with the conventional case, the battery can be easily manufactured and the battery can be made inexpensive.

Further, in the above battery, the insulating member is formed by insert molding using the extending member, the fastening member, and the case lid member, and at least the fixing portion of the extending member and the The insulating member, the extending member, and the fastening member are joined to the surface of the case lid member and between the base portion of the fastening member and the surface of the case lid member while being joined thereto. The member and the case lid member may be a battery that can be handled as one member.

In the conventional battery 900 described above, each member constituting the electrode terminal member 930 (element connecting member 931, externally arranged terminal member 933 and fastening member 935), a case lid member 913, and three insulating members (upper insulating member 950). The seal rubber 960 and the lower insulating member 970) were separately formed, and then these seven members were assembled (see FIG. 11).

In contrast, in the battery described above, the insulating member is formed by insert molding using the extending member, the fastening member, and the case lid member, and the insulating member, the extending member, the fastening member, and the case lid member are 1 It can be handled as one member. For this reason, compared with the past, each component can be easily cleaned and handled, and the battery can be easily manufactured.
Further, among the extension member, the fastening member, and the case lid member, since the metal exposure of the portion covered by the insulating member formed by insert molding is suppressed, metal foreign matters such as metal powder are generated during handling. Can be suppressed more than before.

The “insulating member” can be formed of, for example, a resin. Specifically, a material excellent in resistance to electrolytic solution is preferable. For example, the insulating member may be formed using a single material of a resin such as PPS, PE, or PP, or a composite material including a plurality of types of resins. That's fine.
Examples of the joining method of the extending member, the fastening member, the case lid member, and the insulating member include a joining method using a nano-level anchor effect, a joining method using a silane coupling agent or organic plating, and the like.

Furthermore, in the battery according to any one of the above, the first direction is a direction connecting the center of the terminal insertion hole and the center of the male screw portion of the fastening member in plan view of the case lid member. When the direction orthogonal to the first direction is the second direction, the terminal insertion hole has a first dimension along the first direction larger than a second dimension along the second direction. It is better to use

In the battery described above, the terminal insertion hole is configured such that the first dimension along the first direction is larger than the second dimension along the second direction. For this reason, when an external connection terminal such as a bus bar is brought into contact with the external connection portion of the extending member, and the nut or the like is fastened to the male screw portion of the fastening member, the insulating member rotates relative to the case lid member. Can be effectively prevented.

Furthermore, in the battery according to any one of the above, the fixing portion of the extending member includes a fixing portion back surface facing the case lid member side, and a fixing portion surface facing the case lid member side. It is preferable that the battery has a plate shape and at least a part of the surface of the fixing portion is exposed to the outside of the battery without being covered with the insulating member.

In the battery described above, at least a part of the surface of the fixed portion of the extending portion of the extending member is exposed to the outside of the battery without being covered with the insulating member. For this reason, heat of the electrode terminal member (for example, heat generated inside the battery and transmitted to the electrode terminal member, heat generated by resistance generated in the electrode terminal member itself, etc.) can be radiated from the exposed portion of the surface of the fixed portion. Therefore, it is possible to suppress problems caused by an increase in the temperature of the electrode terminal member (for example, the insulating member is deteriorated by heat and the sealing performance is lowered).
In addition, it is particularly preferable that the entire surface of the fixed portion is exposed to the outside of the battery without being covered with the insulating member, from the viewpoint of heat dissipation.

Further, in the battery described above, the intermediate portion of the extending member has a plate shape having an intermediate portion surface continuous with the fixed portion surface of the fixed portion and an intermediate portion rear surface continuous with the fixed portion rear surface. It is preferable that the battery is formed by exposing at least a part of the surface of the intermediate portion to the outside of the battery without being covered with the insulating member.

In the battery described above, at least a part of the surface of the intermediate portion of the intermediate portion of the extending member is exposed to the outside of the battery without being covered with the insulating member. For this reason, since the heat of the electrode terminal member can be dissipated not only from the exposed portion of the surface of the fixed portion described above but also from the exposed portion of the surface of the intermediate portion, the problem caused by the temperature rise of the electrode terminal member is further effective. Can be suppressed.
In addition, it is particularly preferable that the entire surface of the intermediate portion is exposed to the outside of the battery without being covered with the insulating member, from the viewpoint of heat dissipation.

Furthermore, in the battery according to any one of the above, the external connection portion of the extending member includes a connection portion rear surface facing the case lid member side and a connection portion facing the opposite side to the case lid member side. It is preferable that the battery has a plate shape having a surface, and the surface of the connecting portion is exposed to the outside of the battery without being covered with the insulating member.

In the battery described above, the surface of the connection portion of the external connection portion of the extending member is exposed to the outside of the battery without being covered with the insulating member. For this reason, when an external connection terminal such as a bus bar is brought into contact with the surface of the connection portion and a nut or the like is fastened to the male screw portion of the fastening member, an insulating member is provided between the connection portion surface and the external connection terminal. Therefore, the electrical connection between the surface of the connecting portion and the external connection terminal can be ensured.

Further, another aspect of the present invention is a vehicle on which the battery according to any one of the above is mounted and electric energy generated by the battery is used for all or a part of a power source.

The battery described above has a small number of parts for the electrode terminal member, is easy to manufacture, and can be made inexpensive. Therefore, a vehicle equipped with this battery can be made inexpensive. In addition, since the above-described battery hardly increases resistance in the electrode terminal member even when used for a long period of time and has high reliability, the reliability of the vehicle on which the battery is mounted can be improved.
Examples of the “vehicle” include an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric wheelchair, an electrically assisted bicycle, and an electric scooter.

Further, another aspect of the present invention is a battery-using device that includes the battery described above and uses the battery as at least one energy source.

The battery described above has a small number of parts for the electrode terminal member, is easy to manufacture, and can be made inexpensive. Therefore, the battery using apparatus which mounts this battery can be made cheap. In addition, the above-described battery is less likely to increase resistance in the electrode terminal member even when used for a long period of time, and has high reliability. Therefore, it is possible to improve the reliability of the battery-using device on which the battery is mounted.
Examples of the “battery-equipped device” include various home appliances driven by a battery such as a personal computer, a mobile phone, a battery-driven electric tool, and an uninterruptible power supply, office equipment, and industrial equipment.

1 is a longitudinal sectional view of a lithium secondary battery according to Embodiment 1. FIG. 3 is an exploded perspective view showing an electrode terminal member, a case lid member, and an insulating member in the lithium secondary battery according to Embodiment 1. FIG. 4 is a perspective view showing an electrode terminal member, a case lid member, and an insulating member in an integrated state in the lithium secondary battery according to Embodiment 1. FIG. FIG. 3 is a partially enlarged perspective view showing an enlarged vicinity of a fastening member among an electrode terminal member, a case lid member, and an insulating member in an integrated state of the lithium secondary battery according to Embodiment 1. FIG. 2 is a partially enlarged perspective view showing an enlarged vicinity of a safety valve among an electrode terminal member, a case lid member, and an insulating member in an integrated state of the lithium secondary battery according to Embodiment 1. It is a graph which shows the relationship between a temperature / humidity cycle and conduction resistance. It is a graph which shows the relationship between an exposed area and the temperature of an extending member. FIG. 6 is an explanatory diagram showing a vehicle according to a second embodiment. It is explanatory drawing which shows the hammer drill which concerns on Embodiment 3. FIG. It is a longitudinal cross-sectional view which shows the form of the electrode terminal member vicinity of the battery which concerns on a prior art. It is a disassembled perspective view which shows the electrode terminal member of the battery which concerns on a prior art, a case cover member, and an insulating member.

Explanation of symbols

100 Lithium secondary battery (battery)
110 Battery case 111 Case body member 111h Opening 113 Case lid member 113h Terminal insertion hole 120 Electrode body (power generation element)
130 Positive Electrode Terminal Member (Electrode Terminal Member)
131 Element connection portion 131e Element connection main body portion 131f Insertion portion 133 Externally arranged terminal portion 133e Fixing portion 133f Intermediate portion 133g External connection portion 133gh Screw insertion hole 135 Fastening member 135e Male screw portion 135f Base portion 137 Extension member 140 Negative electrode terminal member ( Electrode terminal member)
150 Insulating member 700 Vehicle 710 Assembly battery (battery)
800 Hammer drill (Battery-equipped equipment)
810 Battery pack (battery)
A1 First dimension A2 Second dimension G1 Center G2 (of the terminal insertion hole) Center H1 (of the external thread) H1 First direction H2 Second direction

(Embodiment 1)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the longitudinal cross-sectional view of the lithium secondary battery (battery) 100 of this Embodiment 1 is shown. 2 to 4 show details of the positive electrode terminal member 130, the negative electrode terminal member 140, and the like constituting the lithium secondary battery 100. FIG. FIG. 5 shows the vicinity of the safety valve portion 113j of the lithium secondary battery 100. 1 to 5 will be described as the upper side of the lithium secondary battery 100 and the lower side as the lower side of the lithium secondary battery 100.

The lithium secondary battery 100 is a prismatic battery that is mounted on a vehicle such as a hybrid car or an electric vehicle, or a battery using device such as a hammer drill. The lithium secondary battery 100 includes a rectangular battery case 110, an electrode body (power generation element) 120 housed in the battery case 100, and an insulating film enclosed in the battery case 110 while surrounding the electrode body 120. The body 125, two

electrode terminal members

130 and 140 supported by the battery case 110, an insulating member 150 for insulating between the battery case 110 and the

electrode terminal members

130 and 140, and the like. In addition, an electrolytic solution is injected into the battery case 110.

Among these, the battery case 110 is made of metal (specifically, pure aluminum) and is formed in a rectangular parallelepiped shape. The battery case 110 has a box shape in which only the upper side is opened. The battery case 110 has a rectangular shape that is welded in a form that closes an opening 111h of the case body member 111 and a case body member 111 that houses an electrode body 120 described later. And a case lid member 113.
The case body member 111 includes a rectangular plate-like case bottom wall portion 111b facing the case lid member 113, and four rectangular plate-like case side wall portions 111c connecting the case lid member 113 and the case

bottom wall portion

111b, 111c,...

In the case lid member 113,

terminal insertion holes

113h and 113h having predetermined shapes penetrating the case lid member 113 are formed at predetermined positions near both ends in the longitudinal direction (left and right direction in FIGS. 1 to 5). Has been. A positive electrode terminal member 130 and an insulating member 150 described later are inserted into one terminal insertion hole 113h (left side in FIGS. 1 and 2), and the other terminal insertion hole 113h (right side in FIGS. 1 and 2). A negative electrode terminal member 140 and an insulating member 150, which will be described later, are inserted through the electrode.

Here, in a plan view of the case lid member 113, a direction connecting a center G1 of the terminal insertion hole 113h and a center G2 of a male screw portion 135e of the fastening member 135 described later is a first direction H1 (see FIG. 2). The direction orthogonal to the first direction H1 is defined as a second direction H2. In the first embodiment, the first direction H1 is the longitudinal direction of the case lid member 113, and the second direction H2 is the short direction of the case lid member 113. Then, the terminal insertion hole 113h is configured such that the first dimension A1 along the first direction H1 is larger than the second dimension A2 along the second direction H2.

Specifically, the terminal insertion hole 113h is a first opening 113h1 that is rectangular in plan view and is elongated in the first direction H1, and is located closer to the center side of the case lid member 113 than the first opening 113h1. The second opening 113h2 is elongated in the direction H1 and has a rectangular shape in plan view that is smaller than the first opening 113h1. In the first embodiment, the first dimension of the terminal insertion hole 113h is A1 = 22 mm, and the second dimension is A2 = 7 mm.

A safety valve portion 113j is provided in the center of the case lid member 113 in the longitudinal direction. The safety valve portion 113j is formed integrally with the case lid member 113 and forms a part of the case lid member 113. The safety valve portion 113j is formed in a thin film shape (thickness 110 ± 30 μm) thinner than other portions of the case lid member 113, and has a V-shaped groove on the upper side thereof, and is particularly thin as 45 ± 30 μm. The breaking portion 113jv is formed in a predetermined shape. As a result, the safety valve portion 113j operates when the internal pressure inside the battery case 110 reaches a predetermined pressure. That is, when the internal pressure reaches a predetermined pressure, the breaking portion 113jv breaks and releases the gas inside the battery to the outside of the battery.

In addition, a thin resin film 115 made of PPS resin is deposited on the safety valve portion 113j (see FIGS. 2, 3 and 5). Since the safety valve portion 113j is formed thin and the break portion 113jv is formed particularly thin, there is a risk of damage such as a hole formed by oxidation. However, since the safety valve portion 113j is protected from the outside by forming the resin film 115 on the safety valve portion 113j, it is possible to effectively prevent the safety valve portion 113j from being damaged. Since the resin film 115 is formed at the same time as the insert forming of the insulating member 150 as will be described later, the material cost and the manufacturing cost are compared with the case of attaching a protective seal or the like on the safety valve portion 113j. Can be reduced.

In addition, a liquid injection port portion 113 m for injecting the electrolyte into the battery case 110 is provided at a predetermined position on the negative electrode terminal member 140 side from the longitudinal center of the case lid member 113.
Note that the entire surface of the case lid member 113 is subjected to organic plating in order to improve the bondability with an insulating member 150 described later formed by insert molding.

As shown in FIG. 1, in the battery case 110, a wound electrode body 120 having an elliptical cross section orthogonal to its own axial direction (left and right direction in FIG. 1) is laid down. In other words, the electrode body 120 is accommodated in a state in which the axial direction of the electrode body 120 is orthogonal to the two case

side wall portions

111 c and 111 c of the case body member 111. The element connection part 131 of the positive electrode terminal member 130 and the element connection part 131 of the negative electrode terminal member 140 are connected to both ends of the electrode body 120 in the axial direction.

This electrode body 120 is obtained by rolling a positive electrode sheet and a negative electrode sheet with a separator interposed between them and compressing them into a flat shape. The positive electrode sheet has a positive electrode current collector made of a long aluminum foil. A positive electrode active material layer containing a positive electrode active material is formed on both surfaces of the positive electrode current collector. The negative electrode sheet has a negative electrode current collector made of a long copper foil. A negative electrode active material layer containing a negative electrode active material is formed on both surfaces of the negative electrode current collector. The separator is made of a porous polypropylene resin sheet.
The electrode body 120 is entirely surrounded by an insulating film envelope 125 formed by bending an insulating film into a box shape having an opening only on the upper side and welding a predetermined portion, except for the upper side.

Next, the positive electrode terminal member 130 and the negative electrode terminal member 140 will be described (see FIGS. 1 to 4). Since the positive electrode terminal member 130 and the negative electrode terminal member 140 have basically the same configuration, the same reference numerals are given to the respective members constituting the positive electrode terminal member 130 and the negative electrode terminal member 140. To explain.
The positive electrode terminal member 130 is electrically and mechanically connected to the positive electrode sheet of the electrode body 120 inside the battery case 110, while the battery is passed through the terminal insertion hole 113 h formed in the battery case 110 (case lid member 113). It extends outside the case 110 (on the case lid member 113). Further, the negative electrode terminal member 140 is electrically and mechanically connected to the negative electrode sheet of the electrode body 120 inside the battery case 110, while passing through a terminal insertion hole 113 h formed in the battery case 110 (case lid member 113). The battery case 110 extends outside (on the case lid member 113).

Each of these

electrode terminal members

130 and 140 extends from the inside of the battery case 110 through the terminal insertion hole 113h onto the case lid member 113, and includes an extending member 137 including an element connecting portion 131 and an externally arranged terminal portion 133, The fastening member 135 is disposed on the case lid member 113 so as to be connectable (contactable) to the extending member 137. Both the extending member 137 and the fastening member 135 are made of metal.

The extending member 137 of the positive electrode terminal member 130 is made of pure aluminum in consideration of welding with the positive electrode sheet (aluminum foil) of the electrode body 120, and the extending member 137 of the negative electrode terminal member 140. Is formed of pure copper in consideration of welding of the electrode body 120 to the negative electrode sheet (copper foil). In addition, the entire surface of these extending

members

137 and 137 is subjected to organic plating in order to improve the bonding property with an insulating member 150 described later formed by insert molding.

Of the extending member 137, the element connecting portion 131 is located inside the battery case 110, and is connected to the element connecting main body portion 131e that is electrically and mechanically connected to the electrode body 120, and the element connecting main body portion 131e. The insertion portion 131 f is inserted into the terminal insertion hole 113 h of the case lid member 113.
The element connection main body 131e has a predetermined shape obtained by bending a metal plate material, and is welded to the electrode body 120.

The insertion portion 131f is continuous with the upper end 131es of the element connection main body portion 131e on the lower side of the insertion portion 131f, and is connected with the fixing portion 133e of the external arrangement terminal portion 133 described later on the upper side of the insertion portion 131f. The insertion portion 131f penetrates the terminal insertion hole 113h of the case lid member 113 and penetrates the insulating member 150 further radially inward of the terminal insertion hole 113h. The insertion portion 131f has a predetermined shape obtained by bending a metal plate material. Specifically, the insertion portion 131f is a first plate insertion portion that extends from the upper end 131es of the element connection main body portion 131e and extends in a plate shape along the case lid member 113 and in the lateral direction of the case lid member 113. 131f1 and a second plate insertion portion 131f2 which is continuous from the first plate insertion portion 131f1 and extends upward in a direction perpendicular to the case lid member 113, and has an L shape.

Of the extending member 137, the externally arranged terminal portion 133 is located on the case lid member 113, and includes a fixed portion 133e, an intermediate portion 133f, and an external connection portion 133g, and has a Z shape (stepped shape).
The fixing part 133e has a plate shape having a fixing part surface 133ea facing the side opposite to the case lid member 113 (upper side) and a fixing part rear surface 113eb facing the case lid member 113 side (lower side). The fixing portion 133e is connected to the insertion portion 131f of the element connecting portion 131 described above, extends along and parallel to the case lid member 113, and is fixed to the case lid member 113 via an insulating member 150 described later. . The entire surface of the fixing portion surface 133ea of the fixing portion 133e is exposed to the outside of the battery without being covered with the insulating member 150.

The intermediate part 133f has a plate shape having an intermediate part surface 133fa continuous with the fixed part surface 133ea of the fixed part 133e and an intermediate part back surface 133fb continuous with the fixed part back surface 133eb. The intermediate portion 133f is connected to the fixing portion 133e, and extends in a direction away from the case lid member 113 in the direction away from the case lid member 113, in the first embodiment, in the direction perpendicular to the case lid member 113 (upper side). Yes. The entire surface of the intermediate portion 133fa of the intermediate portion 133f is exposed to the outside of the battery without being covered with an insulating member 150 described later.

The external connection portion 133g has a plate shape having a connection portion surface 133ga facing the side opposite to the case lid member 113 (upper side) and a connection portion rear surface 133gb facing the case lid member 113 side (lower side). The external connection portion 133g is connected to the intermediate portion 133f, extends along and parallel to the case lid member 113, and is formed with a circular screw insertion hole 133gh passing therethrough. The entire external connection portion 133g is exposed outside the battery without being covered with an insulating member 150 described later. The connection portion surface 133ga of the external connection portion 133g is used for electrical connection with an external connection terminal such as a bus bar.

In the conventional battery 900, as described above, the element connection member 931 and the externally arranged terminal member 933 are separate members (see FIGS. 10 and 11). On the other hand, in the first embodiment, the above-described element connecting portion 131 and the externally arranged terminal portion 133 are integrally formed by bending a single metal plate having a predetermined shape, and extending from one member. The member 137 is used.

Next, the fastening member 135 will be described. The fastening member 135 includes a male screw portion 135e having a male screw formed on its outer periphery and a base portion 135f having a larger diameter than this.
Among these, the male screw portion 135e is inserted into the screw insertion hole 133gh of the external connection portion 133g of the extending member 137 in a form extending in a direction (vertical direction) orthogonal to the case lid member 113, and is formed on the outer periphery as described above. A male screw is formed. In FIGS. 1 to 4, the description of the male screw is omitted.

The base portion 135f is a disc-shaped disc portion 135f1 and is located on the case lid member 113 side of the disc portion 153f1, and has a columnar portion 135f2 that is slightly smaller in diameter than the disc portion 135f1 and has a cylindrical outer shape. (See FIG. 2). The base portion 135f is located closer to the case lid member 113 than the external threaded portion 135e and the external connection portion 133g of the extending member 137. Of the base portion 135f, the base surface 135fa facing the side opposite to the case lid member 113 (upper side) abuts on the connection portion back surface 133gb of the external connection portion 133g of the extension member 137, and the fastening member 135 extends. The lead member 137 is electrically connected.

Further, the base portion 135f is formed with a concave portion 135fc having a hexagonal shape in plan view, which is recessed on the side (upper side) opposite to the case lid member 113 side and opened on the base rear surface 135fb facing the case lid member 113 side (lower side). Has been. In the recess 135fc, a protruding portion 150fn of an insulating member 150 described later is filled. Thereby, the base 135f and the insulating member 150 are joined to each other so that the fastening member 135 cannot rotate around the axis thereof.

Next, the insulating

members

150 and 150 fixed to the case lid member 113 together with the

electrode terminal members

130 and 140 will be described (see FIGS. 1 to 4). The insulating member 150 is disposed between the

electrode terminal members

130 and 140 and the case lid member 113 to prevent the

electrode terminal members

130 and 140 and the case lid member 113 from contacting and short-circuiting. The insulating member 150 is made of resin (specifically, PPS), and is formed by insert molding using the electrode terminal members 130 and 140 (the extending member 137 and the fastening member 135) and the case lid member 113. Thereby, the insulating member 150, the extending member 137, the fastening member 135, and the case lid member 113 can be handled as one member as shown in FIG.

Specifically, the insulating member 150 is positioned inside the battery case 110 and inside the terminal insertion hole 113h of the case lid member 113, and outside the battery case 110 (on the case lid member 113). And an external insulating portion 150f.
The internal insulating portion 150e is interposed between the insertion portion 131f of the element connection portion 131 of the extending member 137 and the inner peripheral surface 113ha of the terminal insertion hole 113h of the case lid member 113, and is joined to these, and the electrode body 120 is also provided. And the back surface 113b of the case lid member 113. Accordingly, the insertion portion 131f of the element connection portion 131 of the extending member 137 and the case lid member 113 are insulated, and the electrode body 120 and the case lid member 113 are insulated.

In the first embodiment, the insulation and sealing between the element connecting portion 131 and the case lid member 113 are performed only by the insulating member 150 (specifically, the internal insulating portion 150e). That is, in the conventional battery 900 (FIGS. 10 and 11), three insulating members (an upper insulating member 950, a seal rubber 960, and a lower insulating member 970) are used for insulation and sealing between the element connecting member 931 and the case lid member 113. ) Is used. On the other hand, in the first embodiment, only one insulating member 150 is used for insulation and sealing between the element connecting portion 131 and the case lid member 113.

The external insulating portion 150f is formed between the fixing portion 133e of the externally arranged terminal portion 133 of the extending member 137 and the surface 113a of the case lid member 113, and between the base portion 135f of the fastening member 135 and the surface 113a of the case lid member 113. These are joined to each other. Thus, the externally arranged terminal portion 133 of the extending member 137 and the case lid member 113 are insulated, and the base portion 135f of the fastening member 135 and the case lid member 113 are insulated.

Specifically, the external insulating portion 150f is formed with a recess 150fm that is recessed on the case lid member 113 side (lower side) and that opens on the opposite side (upper side) of the case lid member 113 (see FIG. 2). And the fixing | fixed part 133e of the external arrangement | positioning terminal part 133 of the extending member 137 is settled in this recessed part 150fm, and the external insulation part 150f and the fixing | fixed part 133e are mutually joined. Further, the external insulating portion 150f is provided with a hexagonal columnar protruding portion 150fn that protrudes on the opposite side (upper side) from the case lid member 113. As described above, the projecting portion 150fn is accommodated in the recess 135fc of the base portion 135f of the fastening member 135, and the external insulating portion 150f and the base portion 135f are joined to each other.

Although the insulating member 150 is formed by insert molding using the extending member 137, the fastening member 135, and the case lid member 113, as described above, the fixing portion of the fixing portion 133e of the extending member 137 is fixed. It does not cover the surface 133ea. Further, the insulating member 150 does not cover the intermediate portion surface 133fa of the intermediate portion 133f of the extending member 137. Further, the insulating member 150 does not cover the connection portion surface 133ga of the external connection portion 133g of the extending member 137.

As described above, in the lithium secondary battery 100 according to the first embodiment, the

electrode terminal members

130 and 140 include the extending member 137 including the element connecting portion 131 and the externally arranged terminal portion 133, and the fastening member 135. Among them, the extending member 137 is formed by bending a single metal plate having a predetermined shape, and the element connecting portion 131 and the externally arranged terminal portion 133 are integrally formed. For this reason, the

electrode terminal members

130 and 140 are each composed of two members, that is, an extending member 137 and a fastening member 135, and the number of parts is smaller than that of the conventional electrode terminal member 930 composed of three members, and the lithium secondary battery 100 is easy to manufacture, and the lithium secondary battery 100 can be made inexpensive. In addition, since the extending member 137 including the element connecting portion 131 and the externally arranged terminal portion 133 is integrally formed, the resistance of the

electrode terminal members

130 and 140 hardly increases even when used for a long period of time, and the reliability is improved. Can be made.

Furthermore, in the first embodiment, the insulating member 150 is interposed between the insertion portion 131f of the element connection portion 131 of the extending member 137 and the inner peripheral surface 113ha of the terminal insertion hole 113h of the case lid member 113, so that the element Insulation and sealing between the connecting portion 131 and the case lid member 113 are performed only by the insulating member 150. Therefore, the lithium secondary battery 100 can be easily manufactured as compared with the conventional case, and the lithium secondary battery 100 can be made inexpensive.

In the first embodiment, the insulating member 150 is formed by insert molding using the extending member 137, the fastening member 135, and the case lid member 113, and the insulating member 150, the extending member 137, the fastening member 135, and the like. The case lid member 113 can be handled as one member. For this reason, compared with the conventional case in which the seven

members

931, 933, 935, 913, 950, 960, and 970 are handled separately, the parts can be easily cleaned and handled, and the lithium secondary battery 100 Is easy to manufacture.
Moreover, since the metal exposure is suppressed about the part covered with the insulating member 150 formed by insert molding among the extending member 137, the fastening member 135, and the case lid member 113, metal powder or the like is used during handling. The occurrence of metallic foreign matter can be suppressed more than before.

In the first embodiment, the terminal insertion hole 113h formed in the case lid member 113 is configured such that the first dimension A1 along the first direction H1 is larger than the second dimension A2 along the second direction H2. ing. Therefore, when an external connection terminal such as a bus bar is brought into contact with the external connection portion 133g of the extending member 137 and a nut or the like is fastened to the male screw portion 135e of the fastening member 135, the base portion 135f of the fastening member 135 is fixed. The insulating member 150 thus made can be effectively prevented from rotating with respect to the case lid member 113.

In the first embodiment, the entire surface of the fixing portion surface 133ea of the fixing portion 133e of the extending member 137 is covered with the insulating member 150, although the insulating member 150 is formed by insert molding. Not exposed to the outside of the battery. For this reason, heat is generated from the fixed portion surface 133ea by the heat of the electrode terminal members 130 and 140 (for example, heat generated inside the battery and transmitted to the

electrode terminal members

130 and 140, and resistance generated in the

electrode terminal members

130 and 140 themselves). Heat, etc.) can be dissipated, so that it is possible to suppress problems that occur when the temperature of the

electrode terminal members

130 and 140 rises (for example, the insulating member 150 deteriorates due to heat and the sealing performance decreases).

In the first embodiment, the entire surface of the intermediate portion 133fa of the intermediate portion 133f of the extending member 137 is covered with the insulating member 150 even though the insulating member 150 is formed by insert molding. Not exposed to the outside of the battery. For this reason, since the heat of the

electrode terminal members

130 and 140 can be radiated not only from the fixed portion surface 133ea but also from the intermediate portion surface 133fa, the problem caused by the temperature rise of the

electrode terminal members

130 and 140 is further effective. Can be suppressed.

Further, in the first embodiment, although the insulating member 150 is formed by insert molding, the connection portion surface 133ga of the external connection portion 133g of the extending member 137 is not covered with the insulating member 150, and the battery Exposed outside. For this reason, when connecting an external connection terminal such as a bus bar to the connection portion surface 133ga and fastening a nut or the like to the male screw portion 135e of the fastening member 135, the connection portion surface 133ga and the external connection terminal are connected to each other. Since the insulating member 150 is not sandwiched between them, the electrical connection between the connection portion surface 133ga and the external connection terminal can be ensured.

Next, a method for manufacturing the lithium secondary battery 100 will be described.
An extending member 137 is prepared by bending a single metal plate having a predetermined shape. Further, a fastening member 135 and a case lid member 113 are prepared. Then, the insulating member 150 is formed by resin insert molding using these

members

137, 135, and 113. Specifically, the extending member 137, the fastening member 135, and the case lid member 113 are set in a mold, and the molten molding resin is injected into the mold to form the insulating member 150. Thereby, as shown in FIG. 3, the sub-assay which can handle the

insulation members

150 and 150, the

extension members

137 and 137, the

fastening members

135 and 135, and the case cover member 113 as one member can be performed. During the insert molding, the resin film 115 is simultaneously formed on the safety valve portion 113j of the case lid member 113.

Next, the electrode body 120 is prepared, and the element connection portion 131 of the positive electrode terminal member 130 and the element connection portion 131 of the negative electrode terminal member 140 are welded to both ends in the axial direction. Thereafter, the electrode body 120 is inserted into the insulating film enclosure 125. Next, the case lid member 113 is disposed on the opening 111 h of the case body member 111 such that the electrode body 120 and the insulating film enclosure 125 are accommodated in the case body member 111. Then, the peripheral portion of the case lid member 113 and the peripheral edge of the opening 111h of the case main body member 111 are laser-welded. Thereafter, an electrolytic solution is injected into the battery case 110 from the liquid inlet portion 113m of the case lid member 113, and the liquid inlet portion 113m is sealed. Thus, the lithium secondary battery 100 is completed.

(Example)
Subsequently, the result of the test conducted in order to verify the effect of this invention is demonstrated.
(Test 1)
As an example of the present invention, the lithium secondary battery 100 of Embodiment 1 was prepared. Further, as a comparative example, a lithium secondary battery 900 according to the related art shown in FIGS. 10 and 11 was prepared.
And about each test sample, the temperature / humidity cycle test was done. Specifically, each test sample was held at 65 ° C. for 15.5 hours and then held at 40 ° C. for 7.5 hours. Then, after holding at 65 ° C. and 95% RH for 17.5 hours, it was held at 40 ° C. for 7.5 hours. The temperature / humidity condition was set to 1 cycle, and a total of 10 cycles were performed.
For each test sample, the conduction resistance of the

electrode terminal members

130 and 930 was measured before the start of the test, after 4 cycles, and after 10 cycles. The result is shown in the graph of FIG.

From the graph of FIG. 6, the lithium secondary battery 900 of the comparative example has already increased the conduction resistance at the stage where the temperature and humidity cycle test was performed for four cycles, and the conduction resistance has increased further after 10 cycles. In contrast, in the lithium secondary battery 100 of the example, it can be seen that the conduction resistance does not change (does not increase) even when the temperature and humidity cycle test is performed 10 cycles.

The reason why the conduction resistance increases in the lithium secondary battery 900 of the comparative example is that the element connecting member 931 and the externally arranged terminal member 933 are connected by caulking by the rivet portion 931g, so that caulking is performed by the temperature and humidity cycle test. This is probably because the conduction resistance increases due to loosening. On the other hand, in the lithium secondary battery 100 of the example, since the element connection portion 131 and the externally arranged terminal portion 133 are integrally formed, it is considered that resistance increase does not occur even when the temperature and humidity cycle test is performed. . From this, it can be seen that by forming the element connecting portion 131 and the externally arranged terminal portion 133 integrally, resistance increase does not easily occur in the

electrode terminal members

130 and 140 even when used for a long period of time, and the reliability is improved.

(Test 2)
Next, as Example 1 of the present invention, the lithium secondary battery 100 of Embodiment 1 was prepared. As described above, the lithium secondary battery 100 according to the first embodiment includes the entire surface of the fixing portion surface 133ea of the fixing portion 133e of the extending member 137 and the intermediate portion surface of the intermediate portion 133f among the

electrode terminal members

130 and 140. The entire surface of 133fa is exposed to the outside of the battery, and the exposed area of the fixed portion 133e and the intermediate portion 133f combined with each other is 140 mm ² .
As Example 2, a lithium secondary battery in which the intermediate surface 133fa of the intermediate part 133f of the lithium secondary battery 100 of Embodiment 1 was covered with an insulating member 150 was prepared. In this lithium secondary battery, the exposed area of the fixing portion 133e and the intermediate portion 133f (only the total area of the fixing portion surface 133ea in the second embodiment) is 100 mm ² .

Further, as Example 3, based on the lithium secondary battery 100 of Embodiment 1 described above, the entire intermediate surface 133fa of the intermediate portion 133f and half of the fixed portion surface 133ea of the fixing portion 133e are connected to the insulating member 150. A lithium secondary battery covered with was prepared. In this lithium secondary battery, the exposed area of the fixed portion 133e and the intermediate portion 133f (in the third embodiment, half the area of the fixed portion surface 133ea) is 50 mm ² .
Further, as Example 4, based on the lithium secondary battery 100 of Embodiment 1 described above, the entire intermediate surface 133fa of the intermediate portion 133f and the entire fixed portion surface 133ea of the fixing portion 133e are connected to the insulating member 150. A lithium secondary battery covered with was prepared. In this lithium secondary battery, the exposed areas of the fixed portion 133e and the intermediate portion 133f are 0 mm ² .

And about each said test sample, the heat dissipation test was done. Specifically, the WOT running pattern (I ² = 15000, 90 seconds) was performed under the following conditions. That is, one set of energizing current 204A for 2 seconds, then energizing current 138A for 9 seconds, and further energizing current 97A for 4 seconds was repeated 6 times. And the temperature of the extending member 137 was measured. The result is shown in the graph of FIG.

7 that the temperature of the extending member 137 decreases as the exposed area of the fixed portion 133e and the intermediate portion 133f increases. It is considered that the larger the exposed area, the more efficiently the heat of the extending member 137 can be dissipated. When the extending member 137 reaches a high temperature, there is a possibility that a defect such as deterioration of the sealing performance due to deterioration of the insulating member 150 due to this heat may occur. Therefore, it is preferable to increase the exposed areas of the fixed portion 133e and the intermediate portion 133f to keep the temperature of the extending member 137 low.

(Embodiment 2)
Next, a second embodiment will be described. A vehicle 700 according to the second embodiment includes a plurality of lithium secondary batteries (batteries) 100 according to the first embodiment. Specifically, as shown in FIG. 8, the vehicle 700 is a hybrid vehicle that is driven by using an engine 740, a front motor 720, and a rear motor 730 in combination. The vehicle 700 includes a vehicle body 790, an engine 740, a front motor 720, a rear motor 730, a cable 750, and an inverter 760 attached thereto. Further, the vehicle 700 includes an assembled battery 710 having a plurality of lithium secondary batteries 100 therein, and electric energy from the assembled battery 710 is used to drive the front motor 720 and the rear motor 730.

As described above, the lithium secondary battery 100 has a small number of parts for the

electrode terminal members

130 and 140, the lithium secondary battery 100 can be easily manufactured, and the lithium secondary battery 100 can be made inexpensive. . Therefore, the vehicle 700 equipped with the lithium secondary battery 100 can be made inexpensive. Further, the lithium secondary battery 100 is less likely to increase resistance in the

electrode terminal members

130 and 140 even when used for a long period of time, and has high reliability. Therefore, the reliability of the vehicle 700 on which the lithium secondary battery 100 is mounted can be improved.

(Embodiment 3)
Next, a third embodiment will be described. A hammer drill 800 according to the third embodiment is a battery using device on which a battery pack 810 including the lithium secondary battery (battery) 100 according to the first embodiment is mounted. As shown in FIG. 9, this hammer drill 800 has a battery pack 810 accommodated in a bottom 821 of a main body 820, and this battery pack 810 is used as an energy source for driving the drill.

electrode terminal members

130 and 140, the lithium secondary battery 100 can be easily manufactured, and the lithium secondary battery 100 can be made inexpensive. . Therefore, the hammer drill 800 on which the lithium secondary battery 100 is mounted can be made inexpensive. In addition, since the lithium secondary battery 100 is less likely to increase resistance in the

electrode terminal members

130 and 140 even when used for a long period of time and has high reliability, the reliability of the hammer drill 800 on which the lithium secondary battery 100 is mounted can be improved. .

In the above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to the above-described first to third embodiments, and it is needless to say that the present invention can be appropriately modified and applied without departing from the gist thereof. Yes.
For example, in the first to third embodiments, the lithium secondary battery 100 is exemplified as the battery. However, the present invention can be applied to other types of secondary batteries such as a nickel metal hydride battery and a nickel cadmium battery.
In the first to third embodiments, the battery 100 having the wound type power generation element (electrode body 120) is illustrated, but the present invention can also be applied to a battery having a stacked type power generation element.

Claims

A power generation element;
A battery case having an opening and housing the power generation element, and a case lid member that closes the opening of the case body member;
While connecting to the power generation element, an electrode terminal member extending on the case lid member through a terminal insertion hole formed in the case lid member;
An insulating member for insulating between the electrode terminal member and the case lid member,
The electrode terminal member is
An extension member extending from the inside of the battery case onto the case lid member through the terminal insertion hole;
The extending member is
An element connection for connecting to the power generation element,
An element connection main body located inside the battery case and connected to the power generation element; and
An element connection portion that includes the insertion portion that is connected to the element connection main body portion and is inserted into the terminal insertion hole of the case lid member.
An externally arranged terminal portion located on the case lid member of the outside of the battery case,
A fixed portion that is connected to the insertion portion of the element connecting portion, extends along the case lid member, and is fixed to the case lid member via the insulating member,
An intermediate portion that continues to the fixed portion and extends away from the case lid member, and
An external connection terminal portion that is continuous with the intermediate portion, extends along the case lid member, and includes an external connection portion formed with a screw insertion hole that penetrates the intermediate portion, and has a Z-shape, and
The extending member is
A battery formed by bending a single metal plate having a predetermined shape and integrally forming the element connecting portion and the externally arranged terminal portion.
The battery according to claim 1,
The electrode terminal member is
A fastening member located on the case lid member;
The fastening member is
A male screw part inserted into the screw insertion hole of the extension member in a form extending in a direction orthogonal to the case lid member, and a male screw formed on the outer periphery;
A battery having a diameter larger than that of the male screw portion and a base portion located on the case lid member side with respect to the male screw portion and the external connection portion of the extending member.
The battery according to claim 1,
The insulating member is
At least interposed between the insertion portion of the element connection portion of the extension member and the inner peripheral surface of the terminal insertion hole of the case lid member, from a single member to one electrode terminal member Become
A battery in which insulation and sealing between the element connecting portion and the case lid member are performed only by the insulating member.
The battery according to claim 2,
The insulating member is
At least interposed between the insertion portion of the element connection portion of the extension member and the inner peripheral surface of the terminal insertion hole of the case lid member, from a single member to one electrode terminal member Become
A battery in which insulation and sealing between the element connecting portion and the case lid member are performed only by the insulating member.
The battery according to claim 4,
The insulating member is
Molded by insert molding using the extension member, the fastening member and the case lid member,
At least, between the fixed portion of the extending member and the surface of the case lid member, and between the base portion of the fastening member and the surface of the case lid member, and joined to these ,
A battery in which the insulating member, the extending member, the fastening member, and the case lid member can be handled as one member.
The battery according to claim 4 or 5, wherein
When the case lid member is viewed in plan, a direction connecting the center of the terminal insertion hole and the center of the male screw portion of the fastening member is defined as a first direction, and a direction orthogonal to the first direction is defined as a second direction. When
The terminal insertion hole is
A battery in which a first dimension along the first direction is larger than a second dimension along the second direction.
The battery according to any one of claims 3 to 6,
The fixing portion of the extending member is
A plate having a fixing part back surface facing the case lid member side and a fixing part surface facing the opposite side to the case lid member side,
A battery in which at least a part of the surface of the fixed part is exposed to the outside of the battery without being covered with the insulating member.
The battery according to claim 7,
The intermediate portion of the extending member is
A plate having an intermediate portion surface continuous with the fixed portion surface of the fixed portion and an intermediate portion rear surface continuous with the fixed portion back surface,
A battery in which at least a part of the surface of the intermediate part is exposed to the outside of the battery without being covered with the insulating member.
A battery according to any one of claims 3 to 8,
The external connection portion of the extending member is
The connection part back surface facing the case lid member side and the connection part surface facing the opposite side to the case lid member side has a plate shape,
A battery formed by exposing the surface of the connecting portion to the outside of the battery without being covered by the insulating member.
A vehicle on which the battery according to any one of claims 1 to 9 is mounted and electric energy generated by the battery is used for all or part of a power source.
A battery-operated device equipped with the battery according to any one of claims 1 to 9 and using the battery as at least one energy source.