JP2011243506A - Battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simply structured easily producible battery and a manufacturing method thereof.SOLUTION: A battery 1 comprises an electrode body 50 and a battery case 10 having a battery case body 30 and a temperature sensor part 20. The sensor part includes a temperature detection part 21 located in the battery case body and outside of the electrode body and detecting a temperature of the electrode body; a wire 22 extending from the temperature detection part to the outside through the battery case body; and a holding part 23 that holds a temperature detection part and a case interior wire 22A constituting a part of the wire, makes the battery case body hold the temperature detection part and the case interior wire with the holding part itself to place the temperature detection part at a predetermined location in the battery case body, and makes a part 22B consisting an outer part from the case interior wire of the wire extend to the external of the battery case body through the holding part itself.

Description

  The present invention relates to a battery having a temperature sensor portion for detecting the temperature of an electrode body in a battery case.

In recent years, a chargeable / dischargeable battery has been used as a driving power source for vehicles such as hybrid vehicles and electric vehicles, and portable electronic devices such as notebook computers and video camcorders.
Among such batteries, there is a battery in which a temperature sensor is provided in a battery case in order to detect the temperature of the battery, more specifically, the temperature of the electrode body. For example, it is for using the temperature of the electrode body detected through the temperature sensor part for control of charging / discharging of a battery.
As a battery including such a temperature sensor, for example, Patent Document 1 discloses a temperature detection unit of a temperature sensor covered with a coating material together with a separator between a positive electrode and a negative electrode forming a power generation body (electrode body). Arranged batteries are disclosed. In Patent Document 2, a battery using an internal electrode body (electrode body) formed by winding a positive electrode plate and a negative electrode plate around a hollow core via a separator is positioned at the center of the internal electrode body. A battery in which a temperature sensor is arranged inside a winding core is disclosed.

JP 2002-313431 A JP 2000-277176 A

  However, in the battery of Patent Document 1, the temperature detection unit is held inside the electrode body, and in the battery of Patent Document 2, the temperature sensor is held inside the core. In each battery, the lead wire (wiring) of the temperature sensor is extended to the outside of the battery case body. For this reason, when the electrode body or the core is disposed in the package (battery case body) with the temperature sensor attached to the electrode body or the core, and in order to seal them, in addition to this temperature sensor, a lead wire extending therefrom While considering the arrangement of (wiring), it is necessary to accommodate the electrode body and the winding core in the package and to seal the package, and handling of the wiring is troublesome in manufacturing the battery.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a battery that has a temperature sensor therein and that is easy to manufacture and that can be appropriately disposed.

  One aspect of the present invention is a battery comprising an electrode body, a battery case main body that accommodates the electrode body, and a temperature sensor unit that detects the temperature of the electrode body, wherein the temperature is The sensor unit is located inside the battery case body and outside the electrode body, and detects a temperature of the electrode body, wiring extending from the temperature detection unit to the outside through the battery case body, And among the said temperature detection part and the said wiring, while holding the wiring in a case located inside the said battery case main body, the said temperature detection part and the said wiring in a case are hold | maintained in the said battery case main body via self The temperature detection unit is arranged at a predetermined position inside the battery case body, and a portion of the wiring outside the case wiring is extended from itself to the outside of the battery case body. Holder comprising a cell comprising a.

  In the battery described above, the holding unit of the temperature sensor unit holds the in-case wiring located inside the battery case body among the temperature detecting unit and the wiring, and also connects the temperature detecting unit and the in-case wiring through the battery case. The temperature detection unit is held at a predetermined position inside the battery case main body while being held by the main body, and a portion of the wiring outside the case internal wiring is extended from itself to the outside of the battery case main body. For this reason, like each battery of patent documents 1 and 2, when accommodating an electrode body in a battery case main body, it is not necessary to consider the arrangement relation between the wiring extended from a temperature sensor part (temperature detection part) and an electrode body. The battery is easy to manufacture. In addition, the battery case body can be a battery in which a temperature sensor unit (temperature detection unit) is appropriately arranged.

As the temperature sensor unit (temperature detection unit), the temperature of the electrode body without contact with the electrode body through contact type temperature detection section that contacts the electrode body and detects its temperature, or infrared rays radiated from the electrode body. A non-contact type temperature detection unit that detects Moreover, what contacts the excess electrolyte solution and detects the temperature of an electrode body indirectly is also mentioned.
Among these, examples of the contact-type temperature detection unit include a thermocouple and a thermistor. Moreover, as a non-contact-type temperature detection part, the infrared sensor (radiation temperature sensor etc.) which detects the infrared rays which an electrode body radiates | emits is mentioned, for example.

Moreover, as a battery case, what formed the temperature sensor part in the battery case main body integrally, and what forms a battery case main body and a temperature sensor part separately, and combines after that are mentioned.
In addition, as the electrode body, for example, a laminated electrode body in which flat plate-like positive electrode plates and negative electrode plates are alternately laminated via separators, or a separator is interposed between a strip-like positive electrode and negative electrode And a wound electrode body that is wound.

  Furthermore, in the battery described above, the temperature detection unit is a contact-type temperature detection unit that contacts the electrode body and detects the temperature thereof, and the temperature sensor unit is configured to detect the temperature by its own elastic deformation. The detection unit may be a battery that is urged in a direction in contact with the electrode body.

By the way, when a contact-type temperature detection unit that detects the temperature by contacting the electrode body is used as the temperature detection unit, the contact between the temperature detection unit and the electrode body is caused by variations in the dimensions of the electrode body and the holding unit. There is strength in contact. Then, when the contact is strong, one or both of the temperature detection unit and the holding unit are gradually deformed, and the contact state between the temperature detection unit and the electrode body may change over time. Moreover, when it has hit weakly, a contact may become inadequate.
On the other hand, in the battery described above, the temperature detection unit is a contact-type temperature detection unit, and the temperature sensor unit urges the temperature detection unit in a direction in which the temperature detection unit abuts on the electrode body due to its own elastic deformation. For this reason, a change with time of the contact state between the temperature detection unit and the electrode body hardly occurs. In addition, it is possible to absorb the fluctuations and vibrations in the size and position of the electrode body in the direction in which the temperature detection unit comes into contact with the electrode body, and to reliably bring the temperature detection unit into contact with the electrode body.

  Examples of the elastic deformation mode of the temperature sensor unit include a pattern in which the temperature detection unit itself elastically deforms, a pattern in which the holding unit elastically deforms, and a pattern in which both are deformed.

  Furthermore, in the battery described above, the temperature detection unit may be a battery that urges itself in a direction in which the temperature detection unit abuts on the electrode body due to its own elastic deformation.

  In the battery described above, the temperature detection unit urges itself in the direction in which the temperature detection unit abuts on the electrode body due to its own elastic deformation, so that the temperature detection unit is reliably attached to the electrode body regardless of whether the holding unit is elastically deformed. It is possible to make the contact state between the temperature detector and the electrode body less likely to change with time.

As the elastic temperature detection unit, for example, a foil-like thermocouple is sandwiched between resin films to give elasticity (or a foil-like thermocouple is formed on one film and this is used as the other film. Film-type thermocouple).
Further, a film thermistor in which the thermistor element and the wiring in the vicinity of the thermistor element extending from the thermistor element are sandwiched between resin films to give elasticity can also be mentioned.

  Furthermore, in any one of the batteries described above, the battery case body has a through hole that passes between the inside and the outside of the battery case body, and the temperature sensor unit is separate from the battery case body. Preferably, the battery is formed by being formed, the wiring is inserted into the through hole, and the holding portion is attached to the battery case body in a form of closing the through hole.

  In the above-described battery, the battery case is composed of a battery case main body and a temperature sensor unit separate from the battery case main body. And the holding part of a temperature sensor part is attached to a battery case main body with the form which obstruct | occludes the through-hole of a battery case main body. For this reason, compared with the battery (battery case) which formed the battery case main body and the temperature sensor part integrally, the freedom degree of the form, material, manufacturing method, etc. of a battery case main body and a temperature sensor part can be made high.

  Furthermore, in the battery described above, the battery case main body includes a main case member that forms a recess that accommodates the electrode body, and a lid that seals the main case member, It is a lid through-hole formed in the lid, and the temperature sensor unit may be a battery attached to the lid.

  In the above-described battery, since the temperature sensor unit is attached to the lid, it is necessary to consider the temperature sensor unit and its wiring until the electrode body is accommodated in the main case member and the lid is stacked on the main case member. It is easy to manufacture.

  Alternatively, a battery manufacturing method comprising an electrode body, a battery case body that houses the electrode body, and a temperature sensor unit that detects the temperature of the electrode body, the battery case comprising: The temperature sensor portion is located outside the electrode body inside the battery case body and detects the temperature of the electrode body. The detection unit, the wiring extending from the temperature detection unit to the outside through the battery case body, and the wiring in the case located inside the battery case body among the temperature detection unit and the wiring, and holding itself, The temperature detection unit and the wiring in the case are held by the battery case body, and the temperature detection unit is disposed at a predetermined position inside the battery case body, and the case of the wiring is the case. A holding portion formed by extending a portion outside the wiring from itself to the outside of the battery case body, wherein the wiring is inserted into the through hole and extended to the outside, and the holding portion extends through the through hole. The holding part of the temperature sensor part is a fixed part fixed around the through hole, and a rod shape extending from the fixed part and covering the periphery of the wiring. A rod-shaped portion that holds the temperature detection portion at the tip and is inserted into the through-hole and disposed in the battery case, and the electrode body is accommodated in the battery case body. A battery including: an insertion step of inserting the temperature detection portion and the rod-shaped portion of the temperature sensor portion into the through hole; and a fixing step of fixing and fixing the fixed portion to the battery case body. It is preferable to use this manufacturing method.

  In the battery manufacturing method described above, after the electrode body is accommodated in the battery case main body, the temperature detection part and the rod-like part of the temperature sensor part are inserted and fixed into the through hole. For this reason, it is not necessary to consider the temperature sensor part and its wiring until the electrode body is housed in the battery case body, and the housing of the electrode body (placement of the electrode body on the battery case body, sealing of the battery case body) Etc.) is easy.

  In addition, as a rod-shaped part, what was made into the shape of a straight bar, for example, what was made into the spiral shape and curved shape in order to make elastic deformation easy is mentioned.

  Furthermore, in the battery manufacturing method described above, the battery includes an electrolytic solution inside the battery case body, and the electrolytic solution is passed through the through hole after the housing step and before the insertion step. It is preferable to use a method for manufacturing a battery including a liquid injection process for pouring the battery case body.

  In the liquid injection process of the battery manufacturing method described above, the shape of the battery case body can be simplified because the temperature detection part of the temperature sensor part and the through hole that passes through the rod-like part are also used as the electrolyte injection hole. Become. Moreover, since it is not necessary to seal the liquid injection port separately from the fixing process, the process becomes simple.

1 is a perspective view of a battery according to Embodiment 1. FIG. FIG. 3 is a partial enlarged cross-sectional view (A-A portion in FIG. 1) of the battery according to the first embodiment. 3 is a perspective view of a temperature sensor unit according to Embodiment 1. FIG. 6 is an explanatory diagram of a battery manufacturing method according to Embodiment 1. FIG. 6 is a perspective view of a battery according to Embodiment 2. FIG. It is the elements on larger scale of the battery concerning Embodiment 2 (BB part of FIG. 5). 6 is an explanatory diagram of a battery manufacturing method according to Embodiment 2. FIG. It is explanatory drawing (partial enlarged view) of the temperature sensor part of a deformation | transformation form. It is explanatory drawing (partial enlarged view) of the temperature sensor part of a deformation | transformation form.

(Embodiment 1)
Next, Embodiment 1 of the present invention will be described with reference to the drawings.
First, the battery 1 according to the first embodiment will be described. FIG. 1 is a perspective view of the battery 1, FIG. 2 is a partial cross-sectional view of the battery 1, and FIG. 3 is a perspective view of the temperature sensor 20.
The battery 1 includes an electrode body 50, an electrolytic solution 60, and a battery case 10 having a temperature sensor 20 that detects the temperature of the electrode body 50. The battery 1 is a lithium ion secondary battery that exchanges lithium ions between the positive electrode plate 51 and the negative electrode plate 52 during charging and discharging.

Among these, the electrolytic solution 60 is an organic electrolytic solution obtained by adding LiPF ₆ as a solute to a mixed organic solvent prepared by adjusting ethylene carbonate, ethyl methyl carbonate, and dimethyl carbonate.

The electrode body 50 is formed by winding a belt-like positive electrode plate 51 and a negative electrode plate 52 into a flat shape via a belt-like separator 53 (see FIG. 1). The positive electrode plate 51 and the negative electrode plate 52 of the electrode body 50 are respectively joined to a plate-like positive electrode current collector 91 or negative electrode current collector 92 bent in a crank shape (see FIG. 1).
Among these, the positive electrode plate 51 carries the positive electrode active material layer which is not shown in figure on both surfaces, leaving the positive electrode lead part 51f along one side among strip | belt-shaped aluminum foil (refer FIG. 1). Moreover, the negative electrode plate 52 carries the negative electrode active material layer which is not shown in figure on both surfaces, leaving the negative electrode lead part 52f along one side among strip | belt-shaped copper foil (refer FIG. 1).

On the other hand, the battery case 10 includes an electrode body 50, a battery case body 30 that houses the electrolytic solution 60, and a temperature sensor 20. Among these, the battery case main body 30 includes a main case member 36 and a lid 31 both made of aluminum.
The main case member 36 has an opening 36K and forms a bottomed rectangular box-shaped recess. An insulating film (not shown) made of resin and bent in a box shape is interposed between the main case member 36 and the electrode body 50 to prevent leakage.

The lid 31 has a rectangular plate shape and closes the opening 36K of the main case member 36 to seal the main case member 36. Of the positive electrode current collector 91 and the negative electrode current collector 92 connected to the electrode body 50, the positive electrode terminal portion 91 </ b> A and the negative electrode terminal portion 92 </ b> A located at the tips of the lid body 31 penetrate, respectively. 1 protrudes from the lid surface 31A facing upward. Insulating members 95 made of an insulating resin are interposed between the positive electrode terminal portion 91A and the negative electrode terminal portion 92A and the lid 31 to insulate each other. In addition, a rectangular plate-shaped safety valve 97 is also sealed on the lid 31.
Further, the lid body 31 has a through hole 32 penetrating between the inside and the outside (see FIG. 2). In addition to the temperature sensor 20 being inserted, the through hole 32 is used as a liquid injection hole for injecting the electrolytic solution 60 into the battery case body 30 in the method for manufacturing the battery 1 described later.

The temperature sensor 20 is located inside the battery case body 30 and outside the electrode body 50 described above, and a temperature detection unit 21 that directly contacts the electrode body 50 and detects the temperature of the electrode body 50, and this temperature. A signal line 22 extends from the detection unit 21 to the outside through the battery case body 30 (see FIGS. 1, 2, and 3). 1 to 3, the signal line 22 includes a case inner line portion 22 </ b> A located inside the battery case main body 30 and a portion outside the case inner line portion 22 </ b> A, that is, the outside of the battery case main body 30. It consists of the case outside line part 22B of the site | part located in.
In addition, the holding member 23 of the temperature sensor 20 holds the temperature detection unit 21 and the case extension 22A, and holds the temperature detection unit 21 and the case extension 22A on the battery case body 30 through itself. The temperature detector 21 is arranged at a predetermined position inside the battery case body 30. Further, the holding member 23 extends the case outer line portion 22B from itself to the outside of the battery case body 30 (see FIGS. 1 to 3).

  The holding member 23 made of metal and closing the through-hole 32 of the lid 31 has a disk shape (diameter R1 is 8 mm, axial height H1 is 0.5 mm) and is fixed to the lid 31. It has a fixing portion 23H and a cylindrical rod-like portion 23G (diameter R2 is 4 mm and axial height H2 is 5 mm) extending from the fixed portion 23H (see FIGS. 2 and 3). Among these, the slit SL is formed in the front-end | tip EF of the rod-shaped part 23G, By fixing with the resin in the state which inserted the base end part of the temperature detection part 21 in this slit SL, a temperature detection part is carried out at the front-end | tip EF. 21 is held. Further, through-holes SH extending in the axial direction are formed in the fixed portion 23H and the rod-shaped portion 23G, and the case outer line portion 22B of the signal line 22 extending from the base end of the temperature detecting portion 21 is fixed to the fixed portion. It extends from 23H to the outside of the battery 1. Since the resin (not shown) is also filled between the through hole SH and the signal line 22 (case inner line portion 22A), the through hole SH is hermetically closed. At the same time, the signal line 22 (case extension portion 22A) is held by the holding member 23.

  Moreover, since the holding member 23 is made of an integral metal member, the fixed portion 23H is inserted into the through-hole 32 of the lid 31 and the fixed portion 23H is brought into contact with the lid 31 as shown in FIG. In this state, the periphery of the fixed portion 23H can be welded to the lid body 31, and the through hole 32 of the lid body 31 can be airtightly closed. At the same time, the temperature detector 21 and the signal line 22 (case extension 22A) can be held in the battery case body 30 via the holding member 23.

In the temperature sensor 20 of the first embodiment, a thermocouple TC (product number: SA1-T) manufactured by OMEGA is used for the temperature detection unit 21 (see FIG. 4). This thermocouple TC is a T thermocouple in the JIS standard having two signal lines 22 and 22 made of metal coated with tetrafluoroethylene resin (PFA) and a contact CP of copper and constantan. is there.
Therefore, in the temperature sensor 20 of the first embodiment, the signal line 22 of the thermocouple TC and the wiring connected thereto are used as the signal line 22 of the temperature sensor 20, and the thermocouple TC is used as the temperature detection unit 21. Each of the contact points CP was used.

  The contact CP (and the surrounding area) of the thermocouple TC is laminated with two resin films PF and PF (a flat resin member having a thickness of 0.15 mm) and sandwiched between the resin films PF and PF. . In addition, the outer surface KP of one of the resin films PF is an adhesive surface to which an adhesive is applied (see FIG. 4). Therefore, in the first embodiment, another flat resin film PA is further overlapped and bonded to the adhesive surface to cover the adhesive surface. For this reason, the temperature detection part 21 becomes a form by which the contact CP is arrange | positioned between the layers which laminated | stacked several (3 sheets) resin film PF and PA in flat form. In addition, by setting it as such a form, this temperature detection part 21 itself can be elastically deformed in the cantilever shape in the thickness direction DT.

  The temperature sensor 20 described above is attached to the lid 31 in such a manner that the rod-like portion 23G is inserted through the through hole 32 and closes the through hole 32 (see FIGS. 1 and 2). Specifically, the periphery of the fixed portion 23H of the holding member 23 of the temperature sensor 20 is joined and fixed to the lid 31 by laser welding. As a result, the temperature detection unit 21 held on the tip EF side of the rod-like portion 23G is within the battery case body 30, and the side surface of the electrode body 50 (specifically, for example, the axial direction of the electrode body 50 (see FIG. 1, the outer surface of the central portion in the left-right direction) is in direct contact with the outer surface) while being elastically deformed in a cantilever shape (see FIGS. 1 and 2). That is, in the first embodiment, the temperature detection unit 21 is a contact-type temperature detection unit that abuts on the electrode body 50 and detects the temperature of the electrode body 50. With the temperature detection unit 21 curved, The dimensions and arrangement of the holding member 23 (rod-like portion 23G) and the electrode body 50 are determined so as to come into contact with the electrode body 50. Thus, the temperature detection unit 21 urges the temperature detection unit 21 itself in the contact direction DA in contact with the electrode body 50 by its own elastic deformation (see FIG. 2).

  As described above, in the battery 1 according to the first embodiment, the holding member 23 of the temperature sensor 20 holds the temperature detection unit 21 and the case extension 22A, and the temperature detection unit 21 and the case extension via the holding member 23 itself. The portion 22 </ b> A is held by the battery case body 30, and the temperature detection unit 21 is disposed at a predetermined position inside the battery case body 30. The case outer line portion 22 </ b> B is extended from the holding member 23 itself to the outside of the battery case body 30. For this reason, when the electrode body 50 is accommodated in the battery case body 30 as in the batteries of Patent Documents 1 and 2 described above, the signal line 22 extending from the temperature sensor 20 (temperature detection unit 21) and the electrode body 50 There is no need to consider the arrangement relationship, and the battery 1 can be easily manufactured. Moreover, the battery 1 can be configured in which the temperature sensor 20 (temperature detection unit 21) is appropriately arranged in the battery case body 30.

  Moreover, in this battery 1, the temperature detection part 21 is a contact-type temperature detection part, and the temperature sensor 20 is due to elastic deformation of the temperature sensor 20 itself (the temperature detection part 21 of the temperature sensor 20 in the first embodiment). The temperature detector 21 is urged in the contact direction DA. For this reason, the temporal change of the contact state between the temperature detection unit 21 and the electrode body 50 hardly occurs. Further, even if variations or vibrations in the size and position of the electrode body 50 occur in the contact direction DA, the temperature detection unit 21 can be brought into contact with the electrode body 50 by absorbing them.

  Further, since the temperature detection unit 21 urges the temperature detection unit 21 itself in the contact direction DA due to elastic deformation of the temperature detection unit 21 itself, the temperature detection unit 21 is reliably brought into contact with the electrode body 50. In addition, it is possible to make it difficult for the temperature sensing unit 21 and the electrode body 50 to change with time.

  Moreover, in this battery 1, the battery case 10 is comprised by the battery case main body 30 and the temperature sensor 20 separate from this. The holding member 23 of the temperature sensor 20 is attached to the battery case main body 30 in a form that closes the through hole 32 of the battery case main body 30. For this reason, compared with the battery (battery case) which formed the battery case main body 30 and the temperature sensor 20 integrally, the freedom degree of the form of a battery case main body 30 and the temperature sensor 20, a material, a manufacturing method, etc. can be made high.

  Further, since the temperature sensor 20 is attached to the lid 31, the electrode body 50 is accommodated in the main case member 36 and the lid 31 is overlaid on the main case member 36 as described later (for example, the main case member). It is not necessary to consider the temperature sensor 20 and its signal line 22 until the 36 is sealed with the lid body 31, and manufacturing is easy.

Next, a method for manufacturing the battery 1 according to the first embodiment will be described with reference to the drawings.
The manufacturing method of the battery 1 includes a housing step of housing the electrode body 50 in the battery case main body 30, a liquid injection step of pouring the electrolytic solution 60 into the battery case main body 30 through the through holes 32, and the through holes 32. And a fixing step of fixing and fixing the fixed portion 23H to the battery case main body 30. The insertion step of inserting the temperature detecting portion 21 and the rod-like portion 23G of the temperature sensor 20 is provided.

First, the manufacture of the temperature sensor 20 will be described.
As shown in FIG. 4, the thermocouple TC (product number: SA1-T) manufactured by OMEGA, a resin film PF, and a metal member (holding member 23) made of metal are prepared. Among these, the metal member (holding member 23) has a substantially top-hat shape composed of a disk-shaped fixed portion 23H and a cylindrical rod-shaped portion 23G extending coaxially from the center. Furthermore, a rectangular slit SL is provided at the tip EF of the rod-shaped portion 23G, and a through-hole SH is formed through the shaft core of the rod-shaped portion 23G and the fixed portion 23H (see FIG. 4). ).
First, the resin film PA is affixed to the outer surface KP of one resin film PF of the thermocouple TC, and the temperature detection part 21 is produced. Next, the signal line 22 of the thermocouple TC is inserted into the through hole SH of the metal member (holding member 23), the base end portion of the temperature detection unit 21 is positioned in the slit SL, and an adhesive is used to form the slit SL The base end portion of the temperature detecting unit 21 is fixed to. Further, the opening portion outside the through hole SH through which the signal line 22 is inserted is sealed with a potting agent made of resin.
Thus, the temperature sensor 20 including the holding member 23, the signal line 22, and the temperature detection unit 21 is completed (see FIGS. 1, 2, and 3).

In parallel with this, the electrode body 50 is produced by a known method.
That is, a paste (not shown) obtained by adding positive electrode active material particles, a binder and a conductive material into an organic solvent and kneading them was applied to a strip-shaped positive electrode current collector foil (not shown). After application, the paste on the positive electrode current collector foil was dried. The paste was similarly applied to the back side of the positive electrode current collector foil and dried. Then, the strip-shaped positive electrode plate 51 which compressed the paste dried on both the main surfaces of positive electrode current collection foil with the roll press which is not shown in figure was produced.
On the other hand, a paste (not shown) obtained by charging and kneading the negative electrode active material particles and the binder in an organic solvent was applied to a strip-shaped negative electrode current collector foil (not shown). After application, the paste on the negative electrode current collector foil was dried. Similarly, the paste was applied to the back side and dried. Then, the strip-shaped negative electrode plate 52 which produced by compressing the paste dried on both the main surfaces of negative electrode current collector foil with the roll press which is not shown in figure was produced.
The separator 53 was wound between the positive electrode plate 51 and the negative electrode plate 52 produced as described above, and the flat plate was crushed into a flat wound electrode body 50 (see FIG. 1).

Further, in the electrode body 50, the positive electrode current collector 91 is welded to the positive electrode lead portion 51 f of the positive electrode plate 51, and the negative electrode current collector member 92 is welded to the negative electrode lead portion 52 f of the negative electrode plate 52. Further, the positive electrode current collecting member 91 and the negative electrode current collecting member 92 are passed through the lid 31. Specifically, the positive electrode terminal portion 91 </ b> A located at the tip of the positive electrode current collector 91 and the negative electrode terminal portion 92 </ b> A located at the tip of the negative electrode current collector 92 are penetrated through the lid 31, Project from the surface 31A. Then, a resin insulating member 95 is interposed between the positive electrode terminal portion 91A and the lid body 31 and between the negative electrode terminal portion 92A and the lid body 31 to cover the positive electrode terminal portion 91A and the negative electrode terminal portion 92A. Secure to the body 31. However, in the subsequent insertion step, the temperature detection unit 21 inserted through the through-hole 32 of the lid body 31 urges the temperature detection unit 21 itself to the electrode body 50 due to the elastic deformation of the temperature detection unit 21 itself. The electrode body 50 is fixed to the lid body 31 so that the positional relationship can be surely brought into contact. Thereby, the electrode body 50 and the lid body 31 are integrated.

  In the housing step of housing the electrode body 50 in the battery case body 30, first, the electrode body 50 integrated with the lid body 31 is housed in the main case member 36. The electrode body 50 is accommodated in the main case member 36 before the lid body 31 so that the lid body 31 is positioned on the opening 36K side of the main case member 36. And if the opening 36K of the main case member 36 is covered with the cover body 31, the main case member 36 and the cover body 31 will be joined using laser welding. Thereby, the battery case main body 30 is completed (refer FIG. 1).

  Next, in the liquid injection process, a predetermined amount of the electrolytic solution 60 is injected into the battery case body 30 through the through hole 32 of the lid 31.

  Further, in the insertion step, the temperature detection part 21 and the rod-like part 23G of the produced temperature sensor 20 are inserted into the through hole 32 of the lid 31. Then, the temperature detector 21 bends and contacts the electrode body 50 accommodated in the battery case body 30.

  Thereafter, in the fixing step, the periphery of the fixed portion 23H is welded to the battery case body 30 to close the through hole 32, and the holding member 23 of the temperature sensor 20 is fixed to the battery case body 30 (lid body 31). Thus, the battery 1 is completed (see FIG. 1).

  In the manufacturing method of the battery 1 according to the first embodiment, after the electrode body 50 is accommodated in the battery case main body 30, the temperature detection unit 21 and the rod-shaped portion 23G of the temperature sensor 20 are inserted into the through hole 32 and fixed. For this reason, it is not necessary to consider the temperature sensor 20 and its signal line 22 until the electrode body 50 is housed in the battery case body 30, and the housing of the electrode body 50 (the battery case body of the electrode body 50 in the housing process). 30 and the sealing of the battery case body 30 are easy.

  Further, in the liquid injection process of the manufacturing method of the battery 1 described above, the through-hole 32 that passes through the temperature detection part 21 and the rod-like part 23G of the temperature sensor 20 is also used as an injection hole for the electrolytic solution 60. The shape of the case body 30 is simplified. Moreover, since it is not necessary to perform sealing of the through-hole 32 which made the liquid injection port separately from a fixing process, a process is also simplified.

(Embodiment 2)
Next, a battery 101 according to Embodiment 2 of the present invention will be described with reference to the drawings.
The second embodiment differs from the first embodiment in that the holding member of the temperature sensor unit is made of resin and is integrally formed with the lid.
Therefore, differences from the first embodiment will be mainly described, and description of similar parts will be omitted or simplified. In addition, about the same part, the same effect is produced. In addition, the same contents are described with the same numbers.
The battery 101 of the second embodiment includes a battery case 110 having a temperature sensor unit 120 that detects the temperature of the electrode body 50 in addition to the electrode body 50 and the electrolytic solution 60 similar to those of the first embodiment.

  The battery case 110 includes an electrode body 50, a battery case main body 130 that houses the electrolytic solution 60, and a temperature sensor unit 120. Among these, the battery case main body 130 includes the main case member 36 and the lid 131 similar to those in the first embodiment.

  The lid 131 of the battery case body 130 has a rectangular plate shape and seals the main case member 36. The lid 131 has a through-hole 133 that passes between the inside and the outside of the lid 131 and a liquid injection hole (not shown) separately from the through-hole 133. The liquid injection hole is used when the electrolytic solution 60 is injected into the battery case main body 130 in the manufacture of the battery 101, and is sealed after the injection. On the other hand, unlike the through-hole 32 of Embodiment 1, the through-hole 133 is not used for liquid injection.

Moreover, the temperature sensor part 120 processed and used the thermocouple TC (product number: SA1-T) by OMEGA company similarly to Embodiment 1 (refer FIG. 6).
The holding member 123 of the temperature sensor unit 120 is made of an integrally molded resin and closes the through hole 133 of the lid 131. The holding member 123 is fixed to the lid 131 by closing the through hole 133 of the lid 131 while covering the periphery of the case inner line portion 22 </ b> A located inside the battery case body 130 among the signal wires 22. A fixed portion 123H to be fixed, and a cylindrical rod-shaped portion 123G extending from the fixed portion 123H and covering the periphery of the case extension portion 22A (see FIG. 5).
The holding member 123 is integrally formed with the lid 131 and the temperature sensor unit 120 by insert molding, and airtightly closes the through hole 133 of the lid 131 (battery case body 130). The signal line 22 (case extension 22A) is held by the holding member 123.
Further, the rod-shaped portion 123G of the holding member 123 extends from the fixed portion 123H toward the inside of the battery case main body 130, and holds the temperature detection unit 21 at the tip EF (see FIG. 6).

  On the other hand, since the temperature detection unit 21 of the temperature sensor unit 120 is laminated with a plurality of resin films PF and PA as described in the first embodiment, the temperature detection unit 21 itself cantilevered in the thickness direction DT. It can be elastically deformed.

  The above-described temperature sensor unit 120 is configured such that the temperature detection unit 21 held on the tip EF side of the rod-shaped unit 123G is elastically deformed in a cantilevered manner in the battery case body 130, while the side surface (specifically, For example, the electrode body 50 is in direct contact with the outer surface of the central portion in the axial direction (left and right direction in FIG. 1) (see FIGS. 5 and 6). That is, in the second embodiment, the temperature detection unit 21 is a contact-type temperature detection unit as in the first embodiment, and the holding member is brought into contact with the electrode body 50 in a state where the temperature detection unit 21 is curved. The dimensions and arrangement of the 123 (rod-like portion 123G) and the electrode body 50 are determined. Thus, the temperature detection unit 21 urges the temperature detection unit 21 itself in the contact direction DA by its own elastic deformation (see FIG. 6).

In the battery 101 of the second embodiment described above, as in the battery 1 of the first embodiment, the holding member 123 of the temperature sensor unit 120 holds the temperature detection unit 21 and the case extension 22A, and via the holding member 123 itself. The temperature detector 21 and the case extension 22A are held by the battery case body 130, and the temperature detector 21 is disposed at a predetermined position inside the battery case body 130. The case outer line portion 22B is extended from the holding member 123 itself to the outside of the battery case main body 130. For this reason, the battery 101 can be easily manufactured, and the battery 101 in which the temperature sensor unit 120 (temperature detection unit 21) is appropriately arranged in the battery case main body 130 can be obtained.
As in the first embodiment, the temperature detection unit 21 is a contact-type temperature detection unit, and the temperature sensor unit 120 is an elastic deformation of the temperature sensor 120 (the temperature detection unit 21 of the temperature sensor 120 in the second embodiment). Thus, the temperature detection unit 21 is urged in the contact direction DA. For this reason, the temporal change of the contact state between the temperature detection unit 21 and the electrode body 50 hardly occurs. Further, even if variations or vibrations in the size and position of the electrode body 50 occur in the contact direction DA, the temperature detection unit 21 can be brought into contact with the electrode body 50 by absorbing them.
Furthermore, since the temperature detection unit 21 urges the temperature detection unit 21 in the contact direction DA due to elastic deformation of the temperature detection unit 21 itself, the temperature detection unit 21 is reliably brought into contact with the electrode body 50. In addition, it is possible to make it difficult for the temperature sensing unit 21 and the electrode body 50 to change with time.

Next, a method for manufacturing the battery 101 according to the second embodiment will be described with reference to the drawings.
First, manufacturing of the lid 131 having the temperature sensor unit 120 in the manufacturing method of the battery 101 will be described.
First, as illustrated in FIG. 7A, the signal line 22 extending from the temperature detection unit 21 manufactured in the same manner as in the first embodiment is inserted into the through hole 133 of the lid 131, and the lid 131 and the temperature detection unit 21 are inserted. And the signal line 22 are set in a mold (not shown).
Next, the resin is injected to mold the holding member 123, and the holding member 123, the lid 131, the temperature detection unit 21, and the signal line 22 are integrated. Thereby, the cover body 131 which has the temperature sensor part 120 provided with the holding member 123, the signal wire | line 22, and the temperature detection part 21 is completed (refer FIG. 6, 7 (b)).

  In parallel with this, in the electrode body 50 manufactured by a known method, the positive electrode current collecting member 91 is provided on the positive electrode plate 51 (positive electrode lead portion 51f), and the negative electrode current collecting member 92 is provided on the negative electrode plate 52 (negative electrode lead portion 52f). Weld each. Further, the positive electrode current collecting member 91 and the negative electrode current collecting member 92 are passed through the lid 131. A resin insulating member 95 is interposed between the positive electrode terminal portion 91A and the lid body 131 and between the negative electrode terminal portion 92A and the lid body 131, so that the positive electrode terminal portion 91A and the negative electrode terminal portion 92A are covered. Secure to the body 131. However, a mode (position) in which the temperature detection unit 21 of the temperature sensor unit 120 formed on the lid body 131 abuts against the electrode body 50 while urging the temperature detection unit 21 itself due to elastic deformation of the temperature detection unit 21 itself. The electrode body 50 is fixed to the lid body 131.

In the housing step of housing the electrode body 50 in the battery case main body 130, first, the electrode body 50 integrated with the lid body 131 is housed in the main case member 36. When the opening 36K of the main case member 36 is covered with the lid 131, the main case member 36 and the lid 131 are joined using laser welding. Thereby, the battery case main body 130 is completed (refer FIG. 5).
Next, in the liquid injection process, a predetermined amount of the electrolytic solution 60 is injected into the battery case main body 130 through a liquid injection hole (not shown) of the lid 131, and then the liquid injection hole is sealed.
Thus, the battery 101 is completed (see FIG. 5).

In the above, the present invention has been described with reference to the first and second embodiments. However, the present invention is not limited to the above-described embodiments and the like, and can be appropriately modified and applied without departing from the gist thereof. Needless to say.
For example, in the first and second embodiments, the temperature sensor unit (temperature detection unit) detects the temperature by directly contacting the electrode body 50. However, the detection may be performed in a non-contact (separated) manner with respect to the electrode body through, for example, infrared rays emitted from the electrode body. For example, it is good also as what detects a temperature of an electrode body indirectly by making a temperature sensor part (temperature detection part) contact an excess electrolyte solution.
In the first and second embodiments, the temperature sensor 21 (temperature sensor) is elastically deformed as shown in FIG. However, for example, the holding members 223 and 323 are elastically deformed, such as the spiral-shaped rod-shaped portion 223G shown in FIG. 8 or the curved-shaped rod-shaped portion 323G shown in FIG. 9, or both (the temperature detecting portion and the holding member). You may use the temperature sensor part (temperature sensor) of the structure which deform | transforms.

1,101 battery 10,110 battery case 20 temperature sensor (temperature sensor part)
21 Temperature detector (elastic temperature detector)
22 Signal line (wiring)
22A Case extension (wiring in the case)
22B Case outside line part (Outside of case wiring inside the case)
23,123,223,323 Holding member (holding part)
23G, 123G, 223G, 323G Rod-like part 23H, 123H Solid part 30, 130 Battery case body 31, 131 Cover 32, 133 Through hole (lid through hole)
36 Main case member 50 Electrode body 60 Electrolytic solution 120 Temperature sensor part DA Contact direction (direction in which the holding part contacts the electrode body)
EF tip

Claims (5)

An electrode body;
A battery case comprising: a battery case main body that accommodates the electrode body; and a temperature sensor unit that detects a temperature of the electrode body,
The temperature sensor part
Inside the battery case body, located outside the electrode body, a temperature detection unit that detects the temperature of the electrode body,
Wiring extending outside from the temperature detection unit through the battery case body, and
While holding the in-case wiring located inside the battery case body among the temperature detection unit and the wiring, the temperature detection unit and the in-case wiring are held by the battery case body through itself, A temperature detection part is arranged at a predetermined position inside the battery case body, and a holding part is formed by extending a part of the wiring outside the case wiring from itself to the outside of the battery case body. Including batteries. The battery according to claim 1,
The temperature detector is
A contact-type temperature detection unit that contacts the electrode body and detects its temperature,
The temperature sensor unit is
A battery formed by urging the temperature detection unit in a direction in contact with the electrode body by its own elastic deformation. The battery according to claim 2,
The temperature detector is
A battery formed by urging itself in a direction in contact with the electrode body by elastic deformation of itself. The battery according to any one of claims 1 to 3,
The battery case body is
Having a through-hole penetrating between its own interior and exterior,
The temperature sensor unit is
Formed separately from the battery case body,
The wiring is inserted through the through hole,
A battery in which the holding portion is attached to the battery case body in a form that closes the through hole. The battery according to claim 4,
The battery case body is
A main case member forming a recess for accommodating the electrode body;
A lid that seals the main case member,
The through hole is a lid through hole formed in the lid,
The temperature sensor unit is a battery attached to the lid.

Images