JP2015153731A - Battery cell for test - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery cell for test used as bipolar cell for test and tripolar cell for test, which has a simple and compact structure and is capable of performing accurate measurement, e.g., potential measurement of positive and negative electrodes by a reference electrode, while reducing the cost.SOLUTION: A battery cell for test includes an electrode holder 58 arranged removably in a battery housing section 36 of a container body 12 and housing the content of a battery. The electrode holder 58 includes: an electrode housing recess 62 for housing a first electrode, a second electrode, a separator, and an electrolyte; a first connection holding section 64 for holding the connection of the first electrode removably to the outside of the electrode housing recess 62; and a second connection holding section 76 for holding the connection of the second electrode removably to the outside of the electrode housing recess 62. The container body 12 includes: a first terminal 124 connected electrically with the connection of the first electrode held by the first connection holding section 64; and a second terminal 128 connected electrically with the connection of the second electrode held by the second connection holding section 76.

Description

  The present invention relates to a primary battery such as a manganese battery, an alkaline battery, a lithium battery, a lead storage battery, a nickel-cadmium battery, and the like used in electronic equipment such as a personal computer, a mobile phone, and a digital camera enclosed in a sealed container. , Nickel-hydrogen batteries, secondary batteries such as lithium-ion batteries, double layer capacitors, capacitors, etc. (hereinafter simply referred to as “storage batteries”).

  More specifically, various research institutions such as universities evaluate the performance of contents (positive electrode, separator, negative electrode, electrolyte, etc.) such as electrode materials under research and development that are enclosed in storage batteries. Things have been done.

  For this purpose, the contents are enclosed in a sealed container called a cell, a charging / discharging device is electrically connected to the cell with a cable, and the electrode body enclosed in the cell is repeatedly charged / discharged to be used for a storage battery. Evaluation of performance required as a storage battery, such as its charge / discharge characteristics, temperature characteristics, and safety characteristics, as an electrode material.

  The present invention relates to a test battery cell for evaluating the performance required as such a storage battery, and in order to evaluate the performance of an electrode material under research and development, for example, when charging / discharging is performed, For test purposes to perform various measurement tests such as basic measurement such as charge / discharge characteristics, temperature measurement inside the cell with a thermocouple, pressure measurement inside the cell with a pressure gauge, and collection of gas generated inside the cell with a gas pipe. The present invention relates to a test battery cell used as a polar cell or a test tripolar cell.

  The present invention also relates to a test battery cell for evaluating the performance required for such a storage battery, for example, when charging / discharging is performed by a three-electrode type measurement using a reference electrode. The present invention relates to a test battery cell used as a test triode cell for measuring the potential of a positive electrode with respect to an electrode and the potential of a negative electrode.

  Further, the present invention can be used in the same manner as a conventional bipolar cell for testing by using a bipolar electrode for testing, and in order to evaluate the performance of such an electrode material under research and development, for example, When charging / discharging, basic measurement such as charging / discharging characteristics, temperature measurement inside the cell by thermocouple, pressure measurement inside the cell by pressure gauge, collection of gas generated inside the cell by gas pipe, etc. The present invention relates to a test battery cell used as a test bipolar cell for carrying out a measurement test.

  Conventionally, a storage battery that can be repeatedly charged and discharged has been used as a power source for electronic devices such as notebook computers, mobile phones, and PDAs (Personal Digital Assistance).

  Examples of such a storage battery include an aqueous battery such as a nickel hydride secondary battery, a nonaqueous battery such as a lithium ion secondary battery, a capacitor such as an electric double layer capacitor, and a capacitor.

  By the way, in such a storage battery, for example, a storage battery of a mobile phone such as a smartphone, a storage battery that is lightweight, thin, and has a large charging capacity is required. For example, various types of laminate type lithium ion storage batteries have been proposed.

  In the research and development of such a storage battery, it is important to know what temperature, concentration, voltage, pressure, and behavior of the generated gas are occurring inside the actual storage battery. For the purpose of observing the change of the electrode in the storage battery during the charge / discharge test and the purpose of confirming the safety of the storage battery, various researches and tests are required.

  Conventionally, Patent Literature 1 (Japanese Patent No. 4580751) and the like have been proposed as such a test battery cell.

  FIG. 20 is a cross-sectional view of the test battery cell of Patent Document 1.

  As shown in FIG. 20, the test battery cell 300 of Patent Document 1 includes a conductive cell body 304 having a recess 302 that accommodates a test member, and a conductive lid 306 that can seal the recess 302. It has.

  The recess 302 is formed with a test electrode housing 310 that is a plane surrounded by the protrusion 308 and an electrolyte overflow reservoir 312 that is lower than the upper end of the protrusion 308 outside the protrusion 308.

  The electrolyte overflow reservoir 312 is formed of a flat portion 314 along the protrusion 308, a concave groove 316 outside the flat portion 314, and a flat portion 318 outside the concave groove 316.

  Further, a spacer 320 made of a non-conductive material and having an outer shape along the inner wall of the recess 302 and having an inner shape with an inclination that becomes narrower upward is attached to the recess 302.

  Then, an electrolytic solution is injected from above the separator 324 into the test electrode 322 disposed in the test electrode housing 310, and the electrolytic solution is caused to overflow from the upper end of the protrusion 308, so that the test electrode 322 is immersed in a certain amount of electrolytic solution. It is assumed that

  On this separator 324, a counter electrode 326, a counter electrode current collector plate 328, and a pressure spring 330 are arranged, and the lid 306 is sealed by fastening with a bolt 332 and a nut 334, and the test electrode 322 side is closed to the cell body. The counter 326 side is energized from the current collector bolt 336 formed on the lid body 306 with the bolt 332 formed on 304, and is measured.

  With such a configuration, in the test battery cell 300 of Patent Document 1, excess electrolyte solution with respect to the test electrode 322 exceeds the protrusion 308, the flat portion 314 that is the electrolyte overflow reservoir 312, and the concave portion. Since it accumulates in the groove 316 and the flat portion 318, a constant amount of electrolyte is always in contact with the test electrode 322 even when the test battery cell 300 is assembled by changing the operator.

  Thereby, in the test battery cell 300 of patent document 1, an electrochemical characteristic measurement can be performed and evaluation with reproducibility can be performed now.

Japanese Patent No. 4580751

However, in the test battery cell 300 of Patent Document 1, since the connection portion for electrically connecting the electrode to the outside is immersed in the electrolytic solution, the electrical resistance is large.
That is, on the test electrode 322 side, between the joint surfaces of the test electrode 322 and the cell body 304, and on the counter electrode 326 side, between the joint surfaces of the counter electrode 326, the counter electrode current collector plate 328, the pressure spring 330, and the cover plate 306. In addition, the electrical resistance increases due to the presence of the interface through the electrolytic solution having a large electrical resistance.

  In a so-called “laminated storage battery”, for example, a laminated lithium ion storage battery, an electrode body 214 having a structure as shown in FIGS. 21A and 21B is accommodated in a bag-shaped package. Yes.

  In a laminated lithium ion secondary battery (storage battery), lithium cobaltate or the like is dissolved on both surfaces of an aluminum foil with a solvent, and after application, dried and pressed to produce a positive electrode 204 having a substantially square shape. .

  Similarly, a negative electrode 210 having a substantially square shape is manufactured by dissolving a carbon material such as graphite with a solvent on both sides of a copper foil, drying, and pressing after coating.

And, between these positive electrode 204 and negative electrode 210, for example, a separator 212 made of a synthetic resin such as polyethylene resin and polyolefin resin such as polypropylene and having a porous insulating film to which ions can move is interposed. A plurality of these are laminated.
Furthermore, the current collector foils of the respective electrodes (positive electrode 204, negative electrode 210) are bundled together, and are connected to an electrode connection portion (positive electrode connection portion 202, negative electrode) that is electrically connected to the outside. The electrode laminate 214 is manufactured by welding together with the connecting portion 208).

  That is, the electrode body 214 used in the laminate type lithium ion storage battery has a substantially square shape. A plurality of electrodes are stacked. Furthermore, the internal resistance is reduced by welding the current collector foil soaked in the electrolyte and the electrode attachment parts called the tabs (positive electrode connection part 202, negative electrode connection part 208) in the package. It is electrically connected to the outside in a small state.

  However, in the test battery cell 300 of Patent Document 1, the cell body 304 must be formed with a recess 302, a protrusion 308, an electrolyte overflow reservoir 312 and the like, and if the electrode has a square shape, The structure is complicated, the processing is not easy, and the cost is high.

In addition, a plurality of electrodes cannot be stacked.
Furthermore, since the joint surface that is electrically joined to the outside is immersed in the electrolytic solution, it is electrically connected to the outside with a large internal resistance.

  Therefore, the test battery cell 300 of Patent Document 1 does not have a structure suitable as a test battery cell when a laminated lithium ion storage battery is used as a model.

  Furthermore, in the research and development of electrode materials used in such storage batteries, in order to evaluate the performance of electrode materials under research and development, for example, charging and discharging are performed by a third electrode measurement method using a reference electrode. In this case, a test tripolar cell for measuring the potential of the positive electrode and the potential of the negative electrode with respect to the reference electrode has been developed.

  However, the test battery cell 300 of Patent Document 1 merely describes that a reference electrode can be used, and does not disclose or suggest any configuration.

  Also, in the conventional test triode cell, the components are made up of components with a special structure dedicated to the test triode cell, so this is bipolarized, for example, inside the cell by a thermocouple It is impossible to adopt a configuration in which various types of measurement tests such as measurement of temperature, measurement of pressure, collection of gas generated inside the cell, measurement of positive and negative electrode potentials using a reference electrode, and the like are performed.

  In view of such a current situation, the present invention has a simple structure, a compact structure, can reduce costs, and in order to evaluate the performance of an electrode material under research and development, for example, charging / discharging was performed. In order to conduct various measurement tests such as basic measurement such as charge and discharge characteristics, temperature measurement inside the cell with thermocouple, pressure measurement inside the cell with pressure gauge, collection of gas generated inside the cell with gas pipe, etc. An object of the present invention is to provide a test battery cell used as a test two-electrode cell or a test three-electrode cell.

  Further, the present invention is based on a so-called “laminated storage battery”, for example, an electrode body 214 housed in a package of a laminated lithium ion storage battery. An object of the present invention is to provide a test battery cell that can be electrically connected to the outside in a state where resistance is small, and used as a test tripolar cell.

  Another object of the present invention is to provide a test battery cell that can accommodate the electrode body 214 itself accommodated in the package of the laminated lithium ion storage battery, and a test battery cell used as a test triode cell. .

  In addition, the present invention has a simple structure, a compact structure, and can reduce costs. For example, when charging / discharging is performed by three-electrode measurement using a reference electrode, the positive electrode with respect to the reference electrode Potential measurement of the negative electrode, the potential of the negative electrode, and various measurement tests such as temperature measurement inside the cell with a thermocouple, pressure measurement inside the cell with a pressure gauge, collection of gas generated inside the cell, etc. It aims at providing the battery cell for a test used as a test triode cell which can implement a measurement.

  Further, the present invention can easily perform a charge / discharge test using a conventional bipolar cell for testing by using such a triode cell for testing and easily bipolarizing it. Used as a test bipolar electrode that can be configured to perform various types of measurement tests, such as temperature measurement inside a cell using a pair, pressure measurement inside a cell using a pressure gauge, collection of gas generated inside the cell, etc. It aims at providing the battery cell for a test.

The present invention has been invented in order to achieve the problems and objects in the prior art as described above, and the test battery cell of the present invention comprises:
A battery cell for testing provided with a sealed container for test evaluation of electrode materials used for storage batteries,
A container main body composed of an upper container and a lower container, which are configured to be detachable in a pair of upper and lower sides, and form a battery housing portion that constitutes a sealed space that houses the contents of the storage battery;
An electrode holder that is detachably disposed in the battery accommodating portion of the container body and accommodates the contents of the storage battery,
The electrode holder is
A separator that is interposed between the first electrode, the second electrode, and the first electrode and the second electrode, and holds the first electrode and the second electrode in an insulated state; An electrode housing recess for housing the electrolyte solution;
A first connection portion holding portion that detachably holds the connection portion of the first electrode outside the electrode housing recess;
A second connection portion holding portion for detachably holding the connection portion of the second electrode outside the electrode housing recess,
The container body is
A first terminal portion that is electrically connected to the connection portion of the first electrode held by the first connection portion holding portion, and is taken out of the container body;
It is electrically connected to the connection part of the 2nd electrode hold | maintained at the said 2nd connection part holding | maintenance part, The 2nd terminal part taken out to the said container main body is provided, It is characterized by the above-mentioned.

  By comprising in this way, the separator between the 1st electrode which is the contents of a storage battery, the 2nd electrode, and the 1st electrode and the 2nd electrode is inserted in the electrode accommodation recessed part of an electrode holder. It can be made the state immersed in electrolyte solution in the mounted state.

  And the connection part of a 1st electrode can be detachably hold | maintained to the exterior of the electrode accommodation recessed part in which electrolyte solution is accommodated by the 1st connection part holding | maintenance part. Similarly, the connection part of the second electrode can be detachably held outside the electrode housing recess in which the electrolytic solution is housed by the second connection part holding part.

  That is, in a so-called “laminate type storage battery”, for example, a laminate type lithium ion storage battery, an electrode body 214 accommodated in a bag-shaped package body as shown in FIGS. 21 (A) and 21 (B) is provided. It can accommodate in the electrode accommodation recessed part of an electrode holder.

  The first electrode connecting portion (positive electrode connecting portion 202) and the second connecting portion (negative electrode connecting portion 208) of the electrode laminate 214 accommodated in the electrode accommodating recess are the first electrode connecting portion. Can be detachably held outside the electrode housing recess in which the electrolytic solution is housed by the first connection portion holding portion, and the connection portion of the second electrode can be held in the second connection portion holding portion. Thus, it can be detachably held outside the electrode housing recess in which the electrolytic solution is housed.

  That is, the electrode connection portions (the first electrode connection portion and the second electrode connection portion) are not immersed in the electrolyte solution, and the connection portion holding portion (the first connection portion holding portion, the second electrode connecting portion) It is possible to make an electrical connection with the connection portion holding portion) in a state where the electrical resistance is small.

  Further, the electrode holder in such a state that the contents of the storage battery are accommodated can be detachably disposed in the battery accommodating portion of the container body.

  Further, the first electrode take-out portion is electrically connected to the connection portion of the first electrode held by the first connection portion holding portion, and this can be taken out of the container body. Similarly, the second electrode extraction portion is electrically connected to the connection portion of the second electrode held by the second connection portion holding portion, and can be taken out of the container body.

  Therefore, according to the present invention, the structure is simple, the structure is compact, the cost can be reduced, and in order to evaluate the performance of the electrode material under research and development, for example, when charging and discharging are performed, For testing to perform various measurement tests such as basic measurement such as charge / discharge characteristics, temperature measurement inside the cell with thermocouple, pressure measurement inside the cell with pressure gauge, gas collection inside the cell with gas pipe, etc. A test battery cell used as a bipolar cell or a triode cell for testing can be provided.

  In addition, according to the present invention, it is possible to correspond to the positive electrode 204 and the negative electrode 210 having different sizes and shapes only by preparing a plurality of electrode holders corresponding to the positive electrode 204 and the negative electrode 210 having different sizes and shapes. Can be versatile.

The test battery cell of the present invention is
The electrode holder is
A reference electrode disposed in the electrode housing recess of the electrode holder in an insulated state with the first electrode and the second electrode housed in an insulated state in the electrode housing recess of the electrode holder;
A reference electrode holding member that detachably holds the reference electrode;
The container body is
A reference electrode terminal portion that is electrically connected to the reference electrode holding member and is taken out of the container body is provided.

  With this configuration, the reference electrode is disposed in an insulating state between the first electrode and the second electrode in the electrode housing recess of the electrode holder in which the electrolytic solution is housed via the reference electrode holding member. be able to.

  Then, the reference electrode can be detachably held by the reference electrode holding member.

  The reference electrode is electrically connected to the reference electrode terminal portion via a reference electrode holding member that holds the reference electrode, and electricity can be taken out of the container body by the reference electrode terminal portion.

  Therefore, according to the present invention, the structure is simple, the structure is compact, and the cost can be reduced. For example, when charging / discharging is performed by three-electrode measurement using the reference electrode, the reference electrode Various types of measurement tests such as measuring the potential inside the cell with a thermocouple, measuring the pressure inside the cell with a thermocouple, measuring the pressure inside the cell with a pressure gauge, collecting gas generated inside the cell, etc. It is possible to provide a test battery cell used as a test triode cell capable of performing measurements such as.

  The test battery cell of the present invention is characterized in that a reference electrode housing groove for housing the reference electrode is formed in the electrode housing recess of the electrode holder.

  With this configuration, the electrolyte solution can be stored in the reference electrode housing groove, so that the electrodes are reliably energized via the electrolyte solution without causing a liquid junction between the electrodes, and the electrical characteristics, etc. Can be measured.

  Further, the test battery cell of the present invention is characterized in that the battery accommodating portion is formed in the upper container, the lower container, or both the upper container and the lower container.

  As described above, the battery housing portion can be formed in the upper container, the lower container, or both the upper container and the lower container.

  In addition, the test battery cell of the present invention is characterized in that the reference electrode and the reference electrode electrical connection portion are removed to make a bipolar structure.

  By configuring in this way, in the test tripolar cell, it can be easily bipolarized by simply removing the reference electrode and the electrical connection for the reference electrode. For this reason, as in the conventional test bipolar cell Can be used. Furthermore, for example, it is possible to adopt a configuration in which many types of measurement tests such as measurement of the temperature inside the battery with a thermocouple, measurement of the pressure inside the cell, and collection of gas generated inside the cell are performed.

  Further, the test battery cell of the present invention is characterized in that the container body includes an internal access connecting portion for detachably mounting an internal access member such as a thermocouple or a gas pipe.

  By comprising in this way, since the container main body is equipped with the connection part for internal access which mounts | wears with internal access members, such as a thermocouple and a gas pipe, so that it can attach or detach, via a connection part for internal access, for example by a thermocouple Various types of measurement tests such as measurement of the temperature inside the battery, measurement of the pressure inside the cell, and collection of gas generated inside the cell can be performed.

  The test battery cell of the present invention is characterized in that the container body includes a degassing plug for degassing the gas generated in the battery housing portion of the container body.

  By comprising in this way, since a container main body is equipped with the degassing plug for degassing of the gas generated in the battery accommodating part of a container main body, the gas generated inside a cell is externally supplied via a degassing plug. And an accurate measurement test can be performed.

  The test battery cell according to the present invention releases the gas to the outside in order to protect the container body when the gas generated in the battery housing portion of the container body exceeds a predetermined pressure. It is characterized by providing the safety valve part for doing.

  By configuring in this way, for example, when a large amount of gas is generated in the battery housing portion of the container body, and the gas generated in the battery housing portion of the container body exceeds a predetermined pressure, the safety valve portion causes the container body to The battery housing part communicates with the outside, so that the gas generated inside the cell can be discharged to the outside, the container body can be protected, and the measurement test can be performed safely.

  Moreover, the test battery cell of the present invention is characterized in that the test battery cell is a sealed container for testing and evaluating an electrode material or the like used for a lithium ion secondary battery.

  Thus, according to the present invention, it is possible to test and evaluate the electrode material used for the lithium ion secondary battery.

Moreover, the test battery cell of the present invention is characterized in that the reference electrode is linearly arranged parallel to one side of the first electrode or the second electrode.
By configuring in this way, for example, when measuring the potential of the negative electrode 210 with respect to the reference electrode, the reference electrode is arranged linearly parallel to one side 209 of the negative electrode 210. The current density flowing between the electrodes can be made uniform, and reliable and stable potential measurement is possible.

  Moreover, the test battery cell of the present invention is characterized in that the first electrode and the second electrode of the storage battery have a square shape.

  Further, in the test battery cell of the present invention, the shape of the first electrode and the second electrode of the storage battery is L-shaped, and the connection portion of the first electrode and the connection of the second electrode It is characterized in that it can be directly energized to the outside through the section.

  By configuring in this way, by making the shape of the electrode L-shaped, electricity can be taken out directly from the current collector foil, so the step of welding the current collector foil and current collector tab is omitted. This eliminates the need to purchase expensive welding machines.

The test battery cell of the present invention is
Remove the reference electrode and the terminal portion for the reference electrode,
Instead of the reference electrode terminal part, an internal access connecting part for detachably attaching an internal access member such as a thermocouple or a gas pipe is provided.

  By configuring in this way, it is possible to mount the internal access member such as a gas pipe by using the internal electrode connecting portion instead of the reference electrode terminal portion by making the three poles bipolar.

  According to the present invention, in order to evaluate the performance of an electrode material under research and development, for example, when charging / discharging is performed, the charge is reduced. Test bipolar for conducting various measurement tests, including basic measurements such as discharge characteristics, temperature measurement inside the cell with a thermocouple, pressure measurement inside the cell with a pressure gauge, and gas collection inside the cell with a gas pipe A test battery cell used as a cell or a test triode cell can be provided.

Moreover, according to the present invention, the connection portion of the first electrode can be detachably held by the first connection portion holding portion outside the electrode housing recess in which the electrolytic solution is housed. The connection portion of the two electrodes can be detachably held outside the electrode housing recess in which the electrolytic solution is housed by the second connection portion holding portion.
That is, the connection part (the connection part of the first electrode and the connection part of the second electrode) that is electrically connected to the outside is not in contact with the electrolytic solution having a large electric resistance, and the electric resistance with the outside is small. Can be electrically connected.

  Therefore, according to the present invention, a so-called “laminated battery”, for example, a tab (positive electrode connecting portion 202, negative electrode) housed in a laminated film outer package of a laminated lithium ion battery, which is electrically connected to the outside. It is possible to use the electrode body to which the connecting portion 208) is welded as it is.

  That is, a so-called “laminated storage battery”, for example, a laminate-type lithium ion storage battery, and an external electrical connection method is that a current collector foil and a tab immersed in the electrolytic solution touch the electrolytic solution having a large electric resistance. First, using a tab that is electrically connected to the outside, it is connected to the outside with a small electrical resistance.

  Therefore, according to the present invention, it is possible to electrically connect to the outside in a state where the electrical resistance is low, similarly to the laminated storage battery.

  In addition, according to the present invention, the positive electrode portion 200 coated with the electrode material of the positive electrode 204 and the negative electrode portion 206 coated with the electrode material of the negative electrode 210 are provided in the electrode housing recess in which the electrolytic solution is housed. The positive electrode connecting portion 202 and the negative electrode connecting portion 208 that are immersed in the electrode and are electrically connected to the outside are electrolyzed by the first connecting portion holding portion and the second connecting portion holding portion, respectively. It can be detachably held outside the electrode housing recess in which the liquid is housed.

  Therefore, according to the present invention, a versatile test bipolar electrode capable of performing reproducible evaluations such as electrode materials used for storage batteries, and a test tripolar cell used as a test battery. A battery cell can be provided.

  In addition, according to the present invention, the first electrode extraction portion is electrically connected to the connection portion of the first electrode, and the second electrode extraction portion is electrically connected to the connection portion of the second electrode. Since this can be taken out to the outside of the container body, the wiring is simple when energized.

  In addition, according to the present invention, it is possible to correspond to the positive electrode 204 and the negative electrode 210 having different sizes and shapes only by preparing a plurality of electrode holders corresponding to the positive electrode 204 and the negative electrode 210 having different sizes and shapes. Can be versatile.

FIG. 1 is a perspective view of a test battery cell of the present invention. FIG. 2 is an exploded perspective view of the test battery cell of FIG. FIG. 3 is a top view of the test battery cell of FIG. 4 is a cross-sectional view taken along line AA of the test battery cell of FIG. FIG. 5 is a cross-sectional view taken along the line BB of the test battery cell of FIG. 6 is a perspective view of an electrode holder of the test battery cell of FIG. FIG. 7 is an exploded perspective view of the electrode holder of FIG. FIG. 8 is a top view of the electrode holder of FIG. 9 is a cross-sectional view of the electrode holder of FIG. 8 taken along the line CC. 10 is a cross-sectional view taken along line DD of the electrode holder of FIG. FIG. 11 is a plan view showing the positive electrode 204, the negative electrode 210, and the separator 212, which are the contents of the laminated storage battery used in the test battery cell of the present invention. FIG. 12 is a perspective view of a test battery cell according to another embodiment of the present invention. 13 is a cross-sectional view of the test battery cell taken along line EE in FIG. FIG. 14 is a cross-sectional view of a test battery cell according to another embodiment of the present invention. FIG. 15 is a cross-sectional view of a test battery cell according to another embodiment of the present invention. FIG. 16 is an exploded perspective view of a test battery cell according to another embodiment of the present invention. FIG. 17 is an exploded perspective view of a test battery cell according to another embodiment of the present invention. FIG. 18 is an exploded perspective view of a test battery cell according to another embodiment of the present invention. FIG. 19 is a top view of the test battery cell of FIG. 18 with the upper container 14 removed. FIG. 20 is a cross-sectional view of a conventional test battery cell 10. FIG. 21 is a view showing the positive electrode 204, the negative electrode 210, and the separator 212, which are the contents of a conventional laminated battery, FIG. 21 (A) is a plan view, and FIG. 21 (B) is FIG. ) Is a schematic exploded sectional view taken along line FF in FIG.

Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings.
Example 1

  1 is a perspective view of the test battery cell of the present invention, FIG. 2 is an exploded perspective view of the test battery cell of FIG. 1, FIG. 3 is a top view of the test battery cell of FIG. 3 is a cross-sectional view taken along line AA of the test battery cell of FIG. 3, FIG. 5 is a cross-sectional view taken along line BB of the test battery cell of FIG. 3, and FIG. 6 is a cross-sectional view of the test battery cell of FIG. FIG. 7 is an exploded perspective view of the electrode holder of FIG. 6, FIG. 8 is a top view of the electrode holder of FIG. 6, and FIG. 9 is a cross-sectional view of the electrode holder of FIG. 10 is a cross-sectional view taken along line DD of the electrode holder of FIG. 8, and FIG. 11 is a positive electrode 204, a negative electrode 210, which are the contents of a laminated storage battery used in the test battery cell of the present invention. It is a top view which shows the separator 212. FIG.

  Meanwhile, research and development institutions such as universities are actively researching and developing electrode materials used for lithium ion secondary batteries currently used in mobile phones and the like. Moreover, since a lithium ion secondary battery is a non-aqueous secondary battery, it needs to be manufactured in inert gas atmosphere, such as argon. The research and development organization manufactures lithium ion secondary batteries in a box filled with an inert gas such as argon called a glove box.

In addition, lithium ion secondary batteries have a wide variety of shapes, from a cylindrical shape to a square shape, ranging from a large in-vehicle size to a small coin size. In research and development organizations, in order to advance research and development using a small electrode size, in a so-called “laminated storage battery”, for example, a laminated lithium ion storage battery, the shape of the electrode is square, and the size is 20 cm ² (50 An electrode material of about 40 mm) is used.

  In addition, the contents contained in the storage battery such as electrode materials are sealed in a simple test sealed container called a “cell”, not laminated and mounted in the glove box. The cell is connected to a charge / discharge device, a charge / discharge test or the like is performed, and an electrode material or the like is evaluated.

  In the following examples, test methods for electrode materials used in, for example, lithium ion secondary batteries, which are performed in such various research and development institutions, will be described.

That is, in such various research and development institutions, in the laminated type lithium ion storage battery, the shape of the electrode is a square shape, and the size of the electrode is about 20 cm ² (50 × 40 mm). And enclosed in a simple sealed container called a “cell”.

  And the electrode used for a lithium ion secondary battery by taking out a cell out of the glove box (outside air), connecting the cell to a charge / discharge device, and performing a charge / discharge test such as repeated charge / discharge Material and other evaluation tests are being conducted. Below, the usage of such a cell is demonstrated.

  By the way, the cell used for the test has two electrodes (for example, a positive electrode and a negative electrode), a “bipolar cell” used for two-electrode measurement, and three electrodes using a reference electrode. And a “three-electrode cell” used for three-electrode measurement.

  In the two-electrode type measurement, only the voltage (potential difference between the two electrodes) can be measured. Therefore, a reaction (oxidation-reduction reaction) occurs simultaneously between the two electrodes, so the first electrode (for example, the positive electrode) is used. I can't know what kind of reaction is happening.

  On the other hand, in the three-electrode type measurement, the potential of each of the two electrodes (for example, the positive electrode and the negative electrode) can be measured with respect to the reference electrode (the reference electrode), so the first electrode (for example, the positive electrode) ) To see what kind of reaction is taking place. For this reason, in the three-electrode type measurement, it is possible to know what kind of reaction is occurring at the second electrode (for example, the negative electrode). Therefore, the three-electrode type measurement is widely used as an effective electrochemical measurement method.

  By the way, in addition to the cells, the research and development organization manufactures actual laminated processing and mounted laminated storage batteries, and conducts test evaluation. Such a laminated storage battery is difficult to repeat disassembly and assembly. For this reason, a test two-pole cell that is easy to disassemble and assemble is used. In addition, the mounted laminated storage battery cannot perform a three-electrode measurement, and cannot collect gas generated in the storage battery. For this reason, a test triode cell is used.

In the following examples, a “cell” is used in a glove box using a square electrode material of about 20 cm ² (50 × 40 mm), which is used for a laminated lithium ion storage battery in such various research and development institutions. Lithium ion by charging and discharging tests such as charging and discharging repeatedly by connecting the cell to a charging / discharging device by taking out the cell outside the glove box (outside air) A method of using the cell for evaluating the electrode material used for the secondary battery will be described.

  1 to 6, reference numeral 10 indicates a test battery cell used as a test triode cell of the present invention as a whole.

  The test battery cell 10 has a first electrode (positive electrode 204), a separator 212, a second electrode (negative electrode 210), a reference electrode 90, an electrolytic solution, and the like, which will be described later, when performing a measurement test. The contents of the storage battery are accommodated. Below, the case where the content of the said storage battery is accommodated in the test battery cell 10 which comprises an accommodation container is demonstrated.

  As shown in FIGS. 1 to 5, the test battery cell 10 of the present invention includes a container body 12, and the container body 12 is a pair of upper and lower rectangular containers configured to be detachable. 14 and a lower container 16.

  When the test battery cell 10 is charged and discharged, corrosive gas is generated in the cell. For this reason, since the upper container 14 and the lower container 16 require mechanical strength and chemical resistance, the upper container 14 and the lower container 16 are made of, for example, a stainless steel such as SUS304 or a metal such as aluminum such as A5052.

  The material of the upper container 14 and the lower container 16 can be changed depending on the pressure and components of the gas generated in the cell, and surface treatment such as plating or fluororesin coating, or fluororesin may be used.

  As shown in FIGS. 2 and 4 to 5, the lower container 16 has a substantially rectangular (rectangular) flat plate shape, and an electrode holder 58 to be described later is provided at the center of the lower container 16. An electrode holder groove 18 for positioning and mounting is formed.

  Further, on the outer periphery of the electrode holder groove portion 18, for example, an O-ring shaped inner seal member 20 a made of fluorine rubber such as Viton (registered trademark) is attached. Further, an O-ring-shaped outer seal member 20b made of a rubber material such as silicon is mounted on the outer side of the inner seal member 20a.

  Moreover, when the upper container 14 and the lower container 16 are fastened (closed) by using a double structure using the inner seal member 20a and the outer seal member 20b, an upper container 14 and a lower container 16 described later are used. The sealing property of the battery accommodating part 36 formed inside is improved.

  The inner seal member 20a needs to seal the corrosive gas generated in the inner seal member 20a when the closed test battery cell 10 is charged / discharged. Requires chemical resistance.

  For the inner seal member 20a, for example, a resin material such as Teflon (registered trademark) may be used.

  On the other hand, since the corrosive gas generated in the cell is not directly in contact with the outer seal member 20b, a rubber material such as inexpensive silicon that can be easily deformed can be used. Since it is also possible to apply a sealing agent such as, sealing performance can be improved.

  Further, as shown in FIG. 2, the flat plate portion 22 outside the outer seal member 20b of the lower container 16 has two screw holes 24 for fastening bolts on each side, for a total of eight screw holes 24. Is formed.

  Further, as shown in FIG. 2, guide bar members 26 are erected on the two corners of the flat plate portion 22 that are located diagonally to the lower container 16.

  On the other hand, as shown in FIGS. 1 to 5, the upper container 14 includes a fastening flange 28 having a shape corresponding to the flat plate portion 22 of the lower container 16.

  The fastening flange 28 of the upper container 14 corresponds to the fastening bolt through hole 28 a corresponding to the screw hole 24 for the fastening bolt of the flat plate portion 22 of the lower container 16 and the guide rod member 26 of the lower container 16. A guide hole 28b is formed.

  The upper container 14 includes a side wall 30 formed so as to extend upward from the inner peripheral side of the fastening flange 28, and a top plate portion 32 is formed on the upper side of the side wall 30. Yes.

  Thereby, inside the upper container 14, a battery housing space 34 that forms a battery housing portion that forms a sealed space that houses the contents of the storage battery is formed. Then, as will be described later, the battery container 36 is formed from the battery container space 34 of the upper container 14 and the electrode holder groove 18 of the lower container 16 by fastening the upper container 14 and the lower container 16. It has come to be.

  Further, as shown in FIGS. 1 to 3 and FIG. 5, a degassing hole 38 is formed in the side wall 30 a on one side of the side wall 30 of the upper container 14, and the degassing hole 38 is interposed through the degassing hole 38. Thus, the battery housing portion 36 of the container body 12 of the test battery cell 10 and the outside communicate with each other.

  The screw part of the gas vent plug 40 is screwed into the screw hole of the gas vent hole 38, and the gas vent plug 40 is attached to the gas vent hole 38. In FIG. 5, reference numeral 42 indicates a sealing member such as an O-ring attached to the knob 40 a of the gas vent plug 40.

  By comprising in this way, since the degassing plug 40 for degassing of the gas generated in the battery accommodating part 36 of the container main body 12 is provided, the degassing plug 40 is provided via the degassing plug 40, that is, By loosening, the gas generated inside the cell can be discharged to the outside through the vent hole 38, and the container body 12 can be safely disassembled after the gas is released.

  Furthermore, a safety valve portion 44 is formed at a position facing the gas vent hole 38 on the side wall 30b on the other side facing the gas vent hole 38 of the side wall 30 of the upper container 14. As shown in FIG. 5, the safety valve portion 44 is formed on the side wall 30 of the upper container 14, and includes a gas discharge hole 46 that communicates with the battery housing portion 36 of the container body 12 of the test battery cell 10. Yes.

  Further, as shown in FIG. 5, a safety valve housing recess 48 is formed outside the gas discharge hole 46 in the side wall 30 of the upper container 14. An annular seal holder 50 is mounted in the safety valve housing recess 48. The seal holder 50 is fitted with a seal member 50a made of an O-ring, and a communication hole 50b communicating with the gas vent hole 38 is formed at the center thereof.

  Further, on the outside of the seal holder 50, a pressing member 54 having a rupture plate 52 mounted at the center is mounted.

  The screw portion of the push screw 56 is screwed into the screw hole of the safety valve portion accommodating recess 48 on the outside of the pressing member 54, and the push screw 56 is attached to the safety valve portion accommodating recess 48.

  The push screw 56 is formed with a through hole 56a at the center thereof.

  With this configuration, for example, a large amount of gas is generated in the battery housing portion 36 of the container body 12, and a large amount of gas generated in the battery housing portion 36 of the container body 12 is generated. When this happens, the rupture plate 52 of the safety valve portion 44 bursts below the pressure resistance of the container body 12.

  As a result, the battery housing portion 36 of the container body 12 communicates with the outside through the gas discharge hole 46 in the side wall 30 of the upper container 14, the communication hole 50 b in the seal holder 50, and the through hole 56 a in the push screw 56. The gas generated inside can be discharged to the outside, and the container body 12 can be prevented from being ruptured or deformed.

  In this embodiment, the gas vent plug 40 and the safety valve portion 44 are provided. However, it is possible to provide only one of them or not to provide them.

  As shown in FIGS. 2 and 4 to 5, an electrode holder 58 for storing the contents of the storage battery is detachably attached to the battery accommodating portion 36 of the container main body 12 in the battery accommodating portion 36 of the container main body 12. It is attached to.

  The electrode holder 58 is not only disposed in an insulated state in the electrode stack 214 and the electrode housing recess main body 62a that houses the electrolyte solution, but also requires chemical resistance to the electrolyte solution. Further, the first connection holding part 64, the second connection holding part 76, and the reference electrode connection holding part 92 are arranged and fixed outside the electrode housing recess main body 62a.

  Accordingly, the electrode holder 58 is made of a material having chemical resistance and electrical insulation, such as a fluororesin such as PTFE resin.

  The electrode holder 58 may be made of a metal material such as A5052 and then subjected to a surface treatment such as a fluororesin coating within a range that satisfies the chemical resistance and electrical insulation conditions.

  Further, as shown in FIGS. 6 to 10, the electrode holder 58 includes a substantially rectangular electrode holder main body 60, and has a substantially rectangular shape inside thereof, and a positive electrode 204 that is a content of the laminated storage battery. The electrode accommodating recess 62 having a shape corresponding to the negative electrode 210 and the separator 212 is formed.

  As shown in FIGS. 6 to 8, the electrode housing recess 62 is a substantially rectangular electrode housing recess corresponding to the shapes of the positive electrode portion 200 of the positive electrode 204, the negative electrode portion 206 of the negative electrode 210, and the separator 212. A main body 62a is provided.

  In addition, a first groove 62 b corresponding to the connection portion of the first electrode (for example, the positive electrode connection portion 202 which is the connection portion of the positive electrode 204) is formed on one side of the electrode housing recess 62. Similarly, in the electrode housing recess 62, a second groove 62c corresponding to the connection portion of the second electrode (for example, the negative electrode connection portion 208 which is the connection portion of the negative electrode 210) is formed.

  In this embodiment, for convenience of explanation, the first electrode is the positive electrode 204 and the second electrode is the negative electrode 210, but the opposite, that is, the first electrode is the negative electrode 210 and the second electrode is the second electrode. Of course, the positive electrode 204 can be used as the positive electrode.

  In the electrode holder body 60 of the electrode holder 58, a first connection portion holding portion 64 is formed outside the electrode housing recess 62 corresponding to the first groove portion 62b. The first connection portion holding portion 64 includes a first terminal block 66 fixed to the electrode holder main body 60. The first terminal block 66 includes a first electrode connection portion (positive electrode). Corresponding to the positive electrode connecting portion 202) of 204, a first connecting portion pressing member 68 is provided.

  Then, as shown in FIGS. 6 to 8, the first connection portion pressing member 68 can be tightened with the first connection portion 202 sandwiched by the first tightening screw 70. ing. Since a compression spring and a pin (both not shown) are used, even if the first tightening screw 70 is loosened, the first connection portion pressing member 68 does not rotate and does not rotate from the first terminal block 66. It is held at a separated position.

  Further, the first terminal block 66 of the first connection portion holding portion 64 has a first electrode for electrically connecting the first electrode electrical connection member 126 of the first terminal portion 124, as will be described later. One connection hole 66a is formed.

  Similarly, in the electrode holder main body 60 of the electrode holder 58, a second connection portion holding portion 76 is formed outside the electrode housing recess 62 corresponding to the second groove portion 62c. The second connection portion holding portion 76 includes a second terminal block 78 fixed to the electrode holder main body 60, and the second terminal block 78 includes a second electrode connection portion (negative electrode). Corresponding to the negative electrode connecting portion 208) 210, a second connecting portion pressing member 80 is provided.

  By the way, since it is preferable that the internal resistance of the storage battery is small, for example, when the members that are structurally immersed in the electrolytic solution having high resistance are electrically connected, joining by welding or the like is performed.

  For this reason, when the electrode body accommodated in the exterior body of the laminate-type storage battery stacks a plurality of electrodes, as shown in FIGS. 21A and 21B, the positive electrode 204, the negative electrode 210, and the like. The current collector foils and the tabs are welded in a state where the current collector foils of the respective electrodes are bundled together. At this time, the positive electrode tab is electrically connected as the positive electrode connecting portion 202 and the negative electrode tab is electrically connected as the negative electrode connecting portion 208 to the outside of the exterior body.

  In addition, the first connection portion holding portion 64 and the second connection portion holding portion 76, that is, the terminal block (first terminal block 66, second terminal block 78), connection portion pressing member (first connection portion). Since the pressing member 68 and the second connecting portion pressing member 80) are not immersed in the electrolytic solution, they can be electrically connected to the outside with a low internal resistance without using a high-resistance electrolytic solution. is there.

  Since the first connection holding part 64 and the second connection holding part 76 are electrically connected to the outside with respect to the first electrode and the second electrode, respectively, the terminal block (first terminal block 66 The second terminal block 78) and the connection portion pressing member (the first connection portion pressing member 68, the second connection portion pressing member 80) are made of, for example, a metal material such as SUS304.

  Then, as shown in FIGS. 6 to 8 and 10, the second connecting portion pressing member 80 can be tightened with the negative connecting portion 208 sandwiched by the second tightening screw 82. It is like that. Since a compression spring and a pin (both not shown) are used, even if the second tightening screw 82 is loosened, the second connection portion pressing member 80 does not rotate, and does not rotate. It is held at a separated position.

  In addition, the second terminal block 78 of the second connection portion holding portion 76 has a second electrode for electrically connecting the second electrode electrical connection member 130 of the second terminal portion 128, as will be described later. Two connection holes 78a are formed.

Furthermore, as shown in FIGS. 6 to 9 and 10, the electrode accommodating recess 62 of the electrode holder 58 has a reference electrode accommodating groove 88 having the first terminal block 66 and the second terminal block 78. Is formed on one side located at right angles to the one side of the electrode housing recess 62 in which is provided.
In this embodiment, the reference electrode housing groove 88 and the reference electrode connecting portion holding section 92 are formed on the left side located at right angles to the one side of the electrode housing recess 62 in FIG. However, in FIG. 8, it is also possible to form it on the one side of the right side that is positioned at right angles to one side of the electrode housing recess 62.

  The depth of the reference electrode housing groove 88 may be the same as the depth of the electrode housing recess body 62a of the electrode housing recess 62, but it is formed deeper than the depth of the electrode housing recess body 62a. desirable. As a result, since the electrolyte can be stored in the reference electrode housing groove 88, the electrolyte flows between the positive electrode 204 (or the negative electrode 210) and the reference electrode 90, and the current flows without liquid junction. Measurement can be performed reliably.

  As shown in FIGS. 2, 6 to 7, 9, and 10, the reference electrode 90 is accommodated in the reference electrode accommodating groove 88. That is, a reference electrode holding portion 92 is formed on one side of the electrode holder main body 60 on the side where the reference electrode accommodating groove portion 88 is formed.

  The reference electrode holding portion 92 includes a reference electrode terminal block 94 fixed to the electrode holder main body 60. The reference electrode terminal block 94 has a reference electrode holding member corresponding to the reference electrode 90. 96 is provided.

  Since the reference electrode holding portion 92 is electrically connected to the reference electrode 90 from the outside, the reference electrode terminal block 94 and the reference electrode holding member 96 are made of a metal material such as SUS304, for example. .

  As shown in FIGS. 6 to 9, the reference electrode holding member 96 includes an upper plate portion 96a. The upper plate portion 96a has two elongated screw holes 96b. Has been. A guide groove 94 b that fits the width of the reference electrode holding member 96 is provided on the upper surface of the reference electrode terminal block 94. Thus, by tightening and loosening the tightening screw 96d in the screw hole 96b, the reference electrode holding member 96 becomes one side 209 (positive side) of the negative electrode 210 housed in the electrode housing recess body 62a as shown in FIG. It is configured to be able to approach and leave in parallel to one side 203) of the electrode 204.

  In addition, between these fastening screw holes 96b, a reference electrode for electrically connecting the reference electrode electrical connecting member 110 of the reference electrode terminal portion 106 to the reference electrode terminal block 94 as will be described later. A connection hole 94a is formed.

  The reference electrode holding member 96 is formed with an elongated hole-shaped slit 96c corresponding to the reference electrode connection hole 94a. Accordingly, as described later, as described above, the reference electrode holding member 96 is not connected to the electrode as shown in FIG. 7 even when the reference electrode electrical connecting member 110 is screwed into the reference electrode connecting hole 94a. It is configured to be able to contact and separate in parallel to one side 209 of the negative electrode 210 (one side 203 of the positive electrode 204) housed in the housing recess main body 62a.

  The reference electrode holding member 96 is formed with a substantially U-shaped reference electrode mounting portion 98 that hangs down from the upper plate portion 96a and reaches the reference electrode housing groove 88. Then, as shown in FIG. 6, a thin reference electrode 90 is wound linearly around a lower horizontal portion 98b positioned between two vertical portions 98a that hang down the reference electrode mounting portion 98. It is attached to.

  In other words, the reference electrode 90 is linearly arranged parallel to one side of the first electrode or the second electrode (one side of the negative electrode 210). 209 or one side 203 of the positive electrode 204) is arranged linearly in parallel.

  That is, for example, when measuring the potential of the negative electrode 210 with respect to the reference electrode 90, the reference electrode 90 is arranged linearly in parallel with one side 209 of the negative electrode 210, so It is possible to make the flowing current density uniform, and it is possible to perform reliable and stable potential measurement.

  For example, the length of the reference electrode 90 that is linearly attached is preferably a length close to one side 209 of the negative electrode 210.

  Further, the reference electrode 90 is made of, for example, lithium metal. Since the lithium metal is soft and sticky like chewing gum, in this embodiment, the thin reference electrode 90 is disposed below the reference electrode mounting portion 98. Although it was wound around the horizontal portion 98b, its shape can be changed as appropriate, and it is wound and mounted on the horizontal portion 98b below the reference electrode mounting portion 98 using a metal wire-like lithium metal or the like as in the prior art. It is also possible.

  Further, when the distance between the reference electrode 90 and the one side 209 of the negative electrode 210 is kept constant without making contact, the pin and the hole (not shown) are referred to for positioning, for example. It is also possible to provide the electrode terminal block 94 and the reference electrode holding member 96.

  As shown in FIG. 11, the electrode used in this example has a square shape with an effective electrode surface acting as a storage battery, and has a shape punched into an L shape for current collection with the outside. The current collector foil is exposed at the tip. The electrode material used was a material used for a lithium ion secondary battery.

  That is, the positive electrode 204 is obtained by dissolving an electrode material such as lithium cobaltate with a solvent on one side of an aluminum foil used as a current collector foil, and after application and drying, the positive electrode 204 is punched into a L shape by a press. The positive electrode part 200 having an effective electrode surface acting as a storage battery has a square shape, and the positive electrode connection part 202 in which the applied electrode material is removed with a solvent or the like and only the current collector foil is exposed.

  Similarly, the negative electrode 210 is formed by dissolving a carbon material such as graphite with a solvent on one side of a copper foil used as a current collector foil, drying it after application, and then punching it into a letter L with a press. Thus, an effective electrode surface acting as a storage battery has a negative electrode portion 206 having a square shape, and a negative electrode connection portion 208 from which the applied electrode material is removed and only the current collector foil is exposed.

  In this way, by making the shape of the electrode used in this example L-shaped, electricity can be directly taken out from the current collector foil, so the step of welding the current collector foil and current collector tab is omitted. It is possible to do so, and there is no need to purchase an expensive welding machine.

  Note that it is preferable that the current collector take-out portion (positive electrode connection portion 202, negative electrode connection portion 208) has a state in which only the current collector foil is exposed by removing the electrode material with a solvent, for example. This is because the electrode material may be cracked when the electrode material is applied and fixed to the connection portion holding portion (the first connection portion holding portion 64 and the second connection portion holding portion 76). Because.

In addition, the current collector extraction part (positive electrode connection part 202, negative electrode connection part 208) is electrically connected to the connection part holding part (first connection part holding part 64, second connection part holding part 76) and the outside. The
For this purpose, the current collector extraction part (positive electrode connection part 202, negative electrode connection part 208) is connected to the terminal block (first terminal block 66, second terminal block 78) and the connection holding member (first connection). It is sandwiched and fixed between the pressing member 68 and the second connecting member pressing member 80).
In this case, the surface of the sandwiched terminal block and pressing member may be flat, but a plurality of V grooves may be provided in order to reduce contact resistance.

  And in the state which these electrode surfaces of the positive electrode 204 and the negative electrode 210 overlap and oppose, it consists of synthetic resins, such as polyolefin resin, such as polyethylene and a polypropylene, and the porous insulating film which can move an ion in the meantime These are laminated by interposing a separator 212 made of the above, and an electrode laminate 214 is produced.

  That is, in the electrode holder 58 configured in this way, as shown in FIG. 11, the separator 212 is interposed between the positive electrode 204 and the negative electrode 210, and these are stacked, and the electrode stack 214 Is made.

  As shown in FIGS. 6 and 7, the electrode stack 214 is formed into a substantially rectangular electrode corresponding to the shapes of the positive electrode portion 200 of the positive electrode 204, the negative electrode portion 206 of the negative electrode 210, and the separator 212. It is attached to the housing recess main body 62a.

  In this embodiment, the electrode laminate 214 is mounted on the electrode housing recess main body 62a. However, as shown in FIG. 7, it may be a single layer, or may be stacked individually and sequentially. It is also possible to attach to the concave body 62a. Note that either the positive electrode 204 or the negative electrode 210 may be stacked below, and any stacking order is possible.

  In this state, as shown in FIGS. 6 and 7, the positive electrode connecting portion 202 that is the connecting portion of the positive electrode 204 is taken out from the first groove portion 62 b and is attached to the first connecting portion holding portion 64. . That is, the tightening screw 70 of the first connection portion pressing member 68 of the first terminal block 66 of the first connection portion holding portion 64 is loosened.

  In this state, the positive connection portion 202 that is the connection portion of the positive electrode 204 is inserted between the first connection portion pressing member 68 and the first terminal block 66, and the first tightening screw 70 is tightened. And fix.

  Further, as shown in FIGS. 6 and 7, the negative electrode connecting portion 208, which is the connecting portion of the negative electrode 210, is taken out from the second groove portion 62 c and attached to the second connecting portion holding portion 76. That is, the second fastening screw 82 of the second connection portion pressing member 80 of the second terminal block 78 of the second connection portion holding portion 76 is loosened.

  In this state, the negative electrode connecting portion 208 that is the connecting portion of the negative electrode 210 is inserted between the second connecting portion pressing member 80 and the second terminal block 78, and the second tightening screw 82 is tightened. And fix.

  As an assembly procedure, the positive electrode connecting portion 202 and the negative electrode connecting portion 208 which are connecting portions are fixed after the electrode laminate 214 is accommodated in the electrode accommodating recess main body 62a. However, the procedure can be changed for convenience. .

  That is, first, after the negative electrode 210 is accommodated in the electrode accommodating recess main body 62a, the negative electrode connecting portion 208 is fixed to the second connecting portion holding portion 76, and then the separator 212 and the positive electrode 204 are laminated in this order. The electrode connection part 202 may be fixed to the first connection part holding part 64 to produce the electrode laminate 214.

  Further, when a plurality of L-shaped electrodes as shown in FIG. 11 are stacked on the electrode housing recess main body 62a, all of the stacked negative electrode connection portions 208 are second connection portion holding portions. All the positive electrode connection parts 202 fixed to 76 and fixed to the first connection part holding part 64 are fixed.

That is, all of the laminated negative electrode connection portions 208 are mounted between the second connection portion pressing member 80 and the second terminal block 78, and the second tightening screw 82 is tightened, so that all In a bundled state, it is fixed to the second connection portion holding portion 76.
On the other hand, all of the stacked positive electrode connection portions 202 are mounted between the first connection portion pressing member 68 and the first terminal block 66, and the first tightening screw 70 is tightened, so that all of the positive connection portions 202 are one. In a bundled state, it is fixed to the first connection part holding part 64.

  Then, by loosening the tightening screw 96d of the upper plate portion 96a of the reference electrode holding member 96, the position of the reference electrode 90 of the horizontal portion 98b of the reference electrode mounting portion 98 of the reference electrode holding member 96 is moved and adjusted to accommodate the electrode. The fastening screw 96d is fastened and fixed so as not to come into contact with the electrode laminate 214 attached to the concave body 62a.

In this state, for example, an electrolyte containing a lithium salt such as LiPF ₆ as an electrolyte is injected into the electrode housing recess 62 of the electrode holder 58, that is, into the electrode housing recess body 62a using a syringe or the like.

  As a result, the positive electrode portion 200 of the positive electrode 204, the negative electrode portion 206 of the negative electrode 210, and the separator 212 housed in the electrode housing recess main body 62a are immersed in the electrolytic solution.

  In addition, the electrolytic solution accumulates in the reference electrode housing groove 88 deeper than the electrode housing recess main body 62a, and the reference electrode 90 is immersed in the electrolytic solution.

  As a procedure for injecting the electrolytic solution, the positive electrode 204, the separator 212, the negative electrode 210, and the reference electrode 90 that are already impregnated with the electrolytic solution may be used.

  In this case, the positive electrode portion 200 of the positive electrode 204 and the negative electrode portion 206 of the negative electrode 210 are immersed in the electrode housing recess 62 in which the electrolytic solution is housed, and are connected to the positive electrode which is a connection portion. The portion 202 and the negative electrode connecting portion 208 are detachably held outside the electrode housing recess 62 in which the electrolytic solution is housed by the first connecting portion holding portion 64 and the second connecting portion holding portion 76, respectively. be able to.

  Further, the reference electrode connection portion holding portion 92 holds the connection portion of the reference electrode 90 (the upper plate portion 96a of the reference electrode holding member 96) detachably on the outside of the electrode housing recess 62 in which the electrolytic solution is housed. be able to.

  Therefore, according to the present invention, there is provided a test battery cell used as a versatile test triode cell capable of performing reproducible evaluations such as electrode materials used in a storage battery with practical reproducibility. Can do.

  Further, since the depth of the reference electrode accommodating groove 88 is deeper than the electrode accommodating recess main body 62a of the electrode accommodating recess 62, the electrolyte can be stored in the reference electrode accommodating groove 88. It is possible to measure the electrical characteristics and the like by reliably energizing the electrodes via the electrolyte without causing liquid junction between the electrodes.

  As shown in FIG. 2, the electrode holder 58 may be positioned and placed in the electrode holder groove 18 of the lower container 16 with the electrolytic solution injected into the electrode housing recess 62 in this manner. In addition, before putting the contents of the storage battery such as the electrode material and the electrolytic solution into the electrode holder 58, the electrode holder 58 is positioned and placed in the electrode holder groove 18 of the lower container 16, and as described above in this state. In addition, the contents of the storage battery such as electrode material and electrolyte may be put in the electrode holder 58.

  Further, as shown in FIGS. 1 to 5, the test battery cell 10 of the present invention has a substantially rectangular shape corresponding to the electrode housing recess 62 of the electrode holder 58 and has an inner periphery of the electrode housing recess 62 of the electrode holder 58. An electrode pressing member 100 arranged so as to be fitted to the side is arranged.

  The electrode pressing member 100 is formed with four small-diameter spring support recesses 102, and compression springs 104 are interposed in the spring support recesses 102 in a compressed state.

  The electrode pressing member 100 is made of an insulating material, for example, an insulating material made of a resin material such as Teflon (registered trademark). The compression spring 104 is made of a metal having electrical conductivity such as stainless steel such as SUS304.

  As shown in FIGS. 1 to 4, the top electrode portion 32 of the upper container 14 has a reference electrode terminal portion at a position corresponding to the reference electrode connection hole 94 a formed in the reference electrode terminal block 94. 106 is formed.

  As shown in FIG. 4, the reference electrode terminal portion 106 includes a reference electrode through hole 108 formed to vertically penetrate the top plate portion 32 of the upper container 14, and the reference electrode through hole 108. The upper end portion 110a of the reference electrode electrical connecting member 110 is inserted so as to pass through.

  In this embodiment, the reference electrode electrical connecting member 110 is screwed into the reference electrode connecting hole 94a. However, it is of course possible to fit the reference electrode electrical connecting member 110 into the reference electrode connecting hole 94a.

  As shown in FIG. 4, the reference electrode through hole 108 supports the reference electrode electrical connecting member 110 by sandwiching a ring-shaped seal member 113 using a fluororesin material such as PTFE. A connector member 112 made of a metal such as stainless steel such as SUS316 is screwed. As shown in FIG. 4, the connector member 112 has a through hole 114 formed therein.

  Further, as shown in FIG. 4, an insulating tube 116 made of an insulating material such as a fluororesin such as PTFE resin is attached to the through hole 114 of the connector member 112.

  In this state, the upper end portion 110 a of the reference electrode electrical connecting member 110 is inserted into the through hole 114 of the connector member 112. The upper end portion 110 a of the reference electrode electrical connecting member 110 is inserted so as to protrude from the upper end 112 a of the connector member 112.

  Further, a wedge-shaped insulating ferrule 120 made of an insulating material such as a fluororesin such as PTFE resin is attached to the inclined recess 118 formed in the upper end 112a of the connector member 112.

  Then, the upper end portion 110 a of the reference electrode electrical connecting member 110 is inserted so as to protrude from the upper end of the connector member 112 through the through hole 120 a of the insulating ferrule 120.

  In this state, a connector nut 122 made of a metal such as stainless steel such as SUS304 is attached so as to be screwed into a screw formed on the outer periphery of the upper end 112a of the connector member 112.

  In this state, the upper end portion 110 a of the reference electrode electrical connecting member 110 protrudes above the connector nut 122 through the through hole 122 a of the connector nut 122. Thus, the reference electrode electrical connecting member 110 is supported and fixed by the connector member 112.

  As shown in FIGS. 1 to 5, the top plate portion 32 of the upper container 14 corresponds to the first connection hole 66 a formed in the first terminal block 66 of the first connection portion holding portion 64. A first terminal portion 124 is formed at a position where the first terminal portion 124 is to be placed.

  The first terminal portion 124 has the same configuration as that of the reference electrode terminal portion 106 described above, and a detailed description thereof will be omitted.

However, the first electrode electrical connection member 126 is attached to the first terminal portion 124 instead of the reference electrode electrical connection member 110.
The lower end portion 126 b of the first electrode electrical connection member 126 is a small-diameter screw portion, and the first connection hole formed in the first terminal block 66 of the first connection portion holding portion 64. An electrical connection is made by screwing with a screw portion formed on 66a.

  Similarly, as shown in FIGS. 1 to 5, the second connection hole formed in the second terminal block 78 of the second connection portion holding portion 76 is formed in the top plate portion 32 of the upper container 14. A second terminal portion 128 is formed at a position corresponding to 78a.

  The second terminal portion 128 has the same configuration as that of the reference electrode terminal portion 106 described above, and a detailed description thereof will be omitted.

However, a second electrode electrical connection member 130 is attached to the second terminal portion 128 instead of the reference electrode electrical connection member 110.
The lower end portion 130 b of the second electrode electrical connection member 130 is a small-diameter screw portion, and a second connection hole formed in the second terminal block 78 of the second connection portion holding portion 76. An electrical connection is made by screwing with a screw part formed on 78a.

  The test battery cell 10 of the present invention configured as described above is assembled as shown in FIG.

  First, as described above, the electrode holder 58 is positioned and placed in the electrode holder groove portion 18 of the lower container 16 as shown in FIG.

  Then, the electrode pressing member 100 in a state where the compression spring 104 is interposed in the spring support recess 102 is disposed so as to be fitted to the inner peripheral side of the electrode housing recess 62 of the electrode holder 58.

Then, the upper container 14 and the lower container 16 are positioned by inserting the guide rod member 26 of the lower container 16 into the guide hole 28b formed in the fastening flange 28 of the upper container 14. .
Thereby, the screw hole 24 for the fastening bolt of the flat plate portion 22 outside the outer seal member 20b of the lower container 16 and the through-hole 28a for the fastening bolt formed in the fastening flange 28 of the upper container 14 are matched. It becomes a state.

  In this state, by tightening the fastening bolt 132 into the screw hole 24 for the fastening bolt of the lower container 16 through the fastening bolt through hole 28a formed in the fastening flange 28 of the upper container 14, the upper container 14 and the lower container 16 are fastened.

  In this state, a battery housing space 34 that forms a battery housing portion that forms a sealed space that houses the contents of the storage battery is formed inside the upper container 14, and the battery housing space 34 of the upper container 14 and the lower side A battery housing portion 36 is formed from the electrode holder groove portion 18 of the container 16.

  The battery holder 36 accommodates the electrode holder 58 in which the positive electrode 204, the negative electrode 210, the separator 212, and the measurement separator 212, which are storage battery materials, are set.

  Further, in this state, the positive electrode 204, the negative electrode 210, and the separator 212, which are the materials of the storage battery, are pressed by the electrode pressing member 100 by the action of the compression spring 104, that is, pressed and adhered. It becomes the state. For this reason, the electrical resistance between each contact surface falls, it will be in the state in which charging / discharging is possible as a storage battery, and an exact measurement can be implemented.

  Next, the reference electrode electrical connecting member 110 is inserted into the container body 12 through the through hole 120a of the insulating ferrule 120 of the reference electrode terminal portion 106 from the lower end portion 110b, and in this state, the reference electrode electrical connection is made. The lower end portion 110 b of the member 110 is screwed into a reference electrode electrical connection hole 94 a formed in the reference electrode terminal block 94.

  Similarly, the first electrode electrical connection member 126 is inserted from the lower end portion 126b into the container body 12, and the lower end portion 126b is formed in the first terminal block 66 of the first connection portion holding portion 64. And screwed into the first electrical connection hole 66a.

  Similarly, the second electrode electrical connection member 130 is inserted into the container body 12 from the lower end portion 130 b, and the lower end portion 130 b is formed in the second terminal block 78 of the second connection portion holding portion 76. And screwed into the second connection hole 78a.

  Then, the respective connector nuts 122 of the reference electrode terminal portion 106, the first terminal portion 124, and the second terminal portion 128 are tightened.

  Furthermore, the test battery cell 10 of the present invention is assembled by screwing the gas vent plug 40 to the upper container 14.

  Then, the test battery cell 10 is taken out of the glove box, and the test battery cell 10 is connected to a measuring instrument such as a potentiostat to perform three-electrode measurement.

  Note that the first electrode (positive electrode 204) is electrically connected to the first connection portion holding portion 64 of the upper container 14 for connection to a measuring instrument such as a potentiostat. From the member 126, the second electrode (negative electrode 210) is electrically connected to the second connection portion holding part 76, and the second electrode electrical connection member 130 is electrically connected to the reference electrode 90. The reference electrode electrical connection member 110 electrically connected to the portion 92 is connected by cable wiring.

  When the measurement is completed, the test battery cell 10 is accommodated in the glove box, the test battery cell 10 is disassembled, and the electrodes and the like are taken out.

  Note that the test battery cell 10 can be safely disassembled after the gas in the cell is completely discharged to the outside by the gas vent plug 40.

  According to the test battery cell 10 of the present invention configured as described above, the first electrode (for example, the positive electrode 204) which is the content of the storage battery and the second electrode storage recess 62 of the electrode holder 58 are provided. It can be set as the state immersed in electrolyte solution in the state which interposed the separator 212 between the electrode (for example, negative electrode 210) and the 1st electrode and the 2nd electrode.

  Then, the first electrode connecting portion (for example, the positive electrode connecting portion 202 of the positive electrode 204) can be detachably attached to the outside of the electrode accommodating recess 62 in which the electrolytic solution is accommodated by the first connecting portion holding portion 64. Can be held in. Similarly, the connection portion of the second electrode (for example, the negative electrode connection portion 208 of the negative electrode 210) is detached from the electrode housing recess 62 in which the electrolytic solution is housed by the second connection portion holding portion 76. It can be held freely.

  Furthermore, the electrode holder 58 in such a state that the contents of the storage battery are accommodated can be detachably disposed in the battery accommodating portion 36 of the container body 12.

  Further, the first electrode connecting portion (for example, for the positive electrode of the positive electrode 204) held by the first connecting portion holding portion 64 by the first terminal portion 124 including the first electrode electric connecting member 126. It is electrically connected to the connecting part 202) and can be taken out of the container body.

  Similarly, the second electrode connection portion (for example, the negative electrode of the negative electrode 210) held by the second connection portion holding portion 76 by the second terminal portion 128 including the second electrode electrical connection member 130. Connection portion 208) and can be taken out of the container body.

  Therefore, according to the present invention, the structure is simple, the structure is compact, the cost can be reduced, and in order to evaluate the performance of the electrode material under research and development, for example, when charging and discharging are performed, For testing to perform various measurement tests such as basic measurement such as charge / discharge characteristics, temperature measurement inside the cell with thermocouple, pressure measurement inside the cell with pressure gauge, gas collection inside the cell with gas pipe, etc. A test battery cell used as a bipolar cell or a triode cell for testing can be provided.

According to the present invention, the connection portion of the first electrode (for example, the positive electrode connection portion 202 of the positive electrode 204) is connected to the electrode housing recess 62 in which the electrolytic solution is housed by the first connection portion holding portion 64. The second electrode connecting portion (for example, the negative electrode connecting portion 208 of the negative electrode 210) is held by the second connecting portion holding portion 76 so that it can be detachably held outside. The electrode housing recess 62 can be detachably held outside.
That is, the connection portion can be electrically connected to the outside in a state where the electrical resistance is small without touching the electrolytic solution having a large electrical resistance.

  In addition, the current collecting method used in so-called “laminated storage battery”, for example, a laminated lithium ion storage battery, welds the current collecting foil and the tab, does not touch the electrolytic solution having a large electric resistance, and uses the tab as the connection portion. Thus, it is connected to the outside with a small electrical resistance.

  Therefore, according to the present invention, it is possible to make an electrical connection with the outside in a state where the electrical resistance is small, similarly to the laminated storage battery.

  In the present invention, an effective electrode surface is a square shape, and an electrode cut into an L shape can be used.

  Therefore, according to the present invention, the step of welding the current collector foil and the tab is omitted, and there is no need to purchase an expensive welding machine.

  Further, the present invention can directly use an electrode body accommodated in an outer package of a laminated lithium ion storage battery, and the electrode body can be flattened regardless of whether it is a single layer electrode body or a plurality of stacked electrode bodies. The rotated electrode body is also accommodated in the electrode holder 58, and the tabs that are the positive and negative electrode connecting portions are fixed to the first connecting portion holding portion 64 and the second connecting portion holding portion 76, Electrical connection is possible.

  Therefore, according to the present invention, since the electrode body used for the laminate type lithium ion storage battery can be used in that state, the versatile test bipolar electrode capable of performing reproducible evaluation close to actuality. A test battery cell used as a cell or a test triode cell can be provided.

  Further, according to the present invention, it is possible to correspond to the positive electrode 204 and the negative electrode 210 having different sizes and shapes by preparing a plurality of electrode holders 58 corresponding to the positive electrode 204 and the negative electrode 210 having different sizes and shapes. Can be excellent in versatility.

  Further, according to the present invention, even if a large amount of gas is generated in the cell during the test, the container body 12 can be prevented from being deformed or ruptured by releasing the gas from the safety valve 44 to the outside. Can be tested.

  Further, according to the present invention, the gas in the cell can be released to the outside by the gas vent plug 40 after the test is completed, so that the test battery cell 10 can be safely disassembled after the gas is released.

  Further, according to the present invention, the reference electrode holding member 96 can be contacted and separated in parallel to one side 209 of the negative electrode 210 and one side 203 of the positive electrode 204 housed in the electrode housing recess main body 62a. The thin reference electrode 90 is mounted on the horizontal portion 98b below the reference electrode mounting portion 98 so as to be wound linearly.

  That is, for example, when measuring the potential of the negative electrode 210 with respect to the reference electrode 90, the reference electrode 90 is arranged linearly in parallel with one side 209 of the negative electrode 210, so It is possible to make the flowing current density uniform, and it is possible to perform reliable and stable potential measurement.

  Therefore, according to the present invention, the structure is simple, the structure is compact, the cost can be reduced, and the three-electrode type measurement using the reference electrode 90, which is difficult with an actual battery, is possible.

  In addition, as in Example 2, which will be described later, for example, various types of measurement tests such as measurement of temperature inside the cell with a thermocouple, measurement of pressure inside the cell with a pressure gauge, and collection of gas generated inside the cell, etc. The test battery cell which can be set as the structure to perform can be provided.

Furthermore, like Example 3 mentioned later, this can be easily bipolarized using the test battery cell 10 of this invention, and a charging / discharging test can be performed.
(Example 2)

  12 is a perspective view of a test battery cell according to another embodiment of the present invention, and FIG. 13 is a cross-sectional view of the test battery cell taken along line EE of FIG.

  The test battery cell 10 of this example has basically the same configuration as the test battery cell 10 of Example 1 shown in FIGS. 1 to 11, and the same reference numerals denote the same components. The detailed description is omitted.

  In the test battery cell 10 of this embodiment, the container body 12 is provided with an internal access connecting portion 134 to which an internal access member such as a thermocouple or a gas pipe is detachably attached.

  In this embodiment, as the internal access connection portion 134, an internal access connection portion 134 for gas pipe connection is shown.

  As shown in FIGS. 12 to 13, the internal access connecting portion 134 has an internal access through hole 136 formed in the top plate portion 32 of the upper container 14.

  In the internal access through hole 136, a connector member 140 made of a metal such as stainless steel such as SUS316, which constitutes a support member that supports the gas pipe 138 as an internal access member, is made of, for example, a fluororesin. The ring-shaped sealing member 141 is sandwiched and is screwed. As shown in FIG. 13, the connector member 140 has a through hole 142 formed therein.

  A lower end 138 a of the gas pipe 138 is inserted into the upper portion of the through hole 142 of the connector member 140.

  Further, as shown in FIG. 13, a wedge-shaped ferrule 146 made of an insulating material such as a metal or a fluororesin such as PTFE resin is attached to the inclined recess 144 formed at the upper end of the connector member 140. Has been.

  Then, the upper end portion 138 b of the gas pipe 138 is inserted and attached so as to protrude from the upper end of the connector member 140 through the through hole 146 a of the ferrule 146.

  In this state, a connector nut 148 made of a metal such as stainless steel such as SUS304 is attached so as to be screwed into a screw formed on the outer periphery of the upper end 140a of the connector member 140.

  Thereby, the gas pipe 138 is supported and fixed by the connector member 140.

  It is possible to attach a pressure gauge and / or a valve (not shown) to the gas pipe 138. For example, when a charge / discharge test is performed, the pressure inside the cell can be measured by the pressure gauge, and the gas generated inside is collected. It can be configured to perform various types of measurement tests.

  In this embodiment, the gas pipe 138 is used as the internal access member, but a thermocouple or other internal access member can be used.

With this configuration, the container main body 12 includes the internal access connection portion 134 that detachably attaches an internal access member such as a thermocouple or a gas pipe. Various types of measurement tests such as measurement of the temperature inside the battery by pairs, measurement of the pressure inside the cell, and collection of gas generated inside the cell can be performed.
(Example 3)

  FIG. 14 is a cross-sectional view of a test battery cell according to another embodiment of the present invention.

  The test battery cell 10 of this example has basically the same configuration as the test battery cell 10 of Example 1 shown in FIGS. 1 to 11, and the same reference numerals denote the same components. The detailed description is omitted.

  As shown in FIGS. 15 to 14, the test battery cell 10 of this example is basically the same as the reference electrode 90 in the test battery cell 10 of Example 1 shown in FIGS. 1 to 11. In this configuration, the reference electrode holding member 96, the reference electrode mounting portion 98, the reference electrode electrical connection member 110, and the like are removed to form a bipolar structure.

  Moreover, the blind ferrule 150 which does not provide the through-hole 120a in the insulation ferrule 120 of the connector member 112 is used.

  That is, in the test battery cell 10 of this embodiment, the through hole 114 of the connector member 112 is closed with the blind ferrule 150 in which the through hole 120a is not provided in the insulating ferrule 120 that is a detachable closing member.

  With this configuration, in the test battery cell 10 of the first embodiment, the bipolar electrode can be easily obtained by simply removing the reference electrode 90 and the reference electrode electrical connecting member 110. For example, potential measurement of positive and negative electrodes Therefore, it is possible to adopt a configuration in which various kinds of measurement tests such as a measurement test are performed.

  In this embodiment, the blind ferrule 150 uses the same insulating material (Teflon (registered trademark)) as the insulating ferrule 120. However, the blind ferrule 150 does not have to be an insulating material, and may be a metal material such as SUS316.

With this configuration, the reference electrode through-hole 108 formed so as to penetrate vertically through the top plate portion 32 of the upper container 14 is simply closed by the blind ferrule 150 which is a closing member. For example, a charge / discharge test can be performed.
Example 4

  FIG. 15 is a cross-sectional view of a test battery cell according to another embodiment of the present invention.

  The test battery cell 10 of this example has basically the same configuration as the test battery cell 10 of Example 1 shown in FIGS. 1 to 11, and the same reference numerals denote the same components. The detailed description is omitted.

  The test battery cell 10 of this example is basically the same as the test battery cell 10 of Example 3 shown in FIGS. 15 to 14, and the test of Example 1 shown in FIGS. 1 to 11. The battery cell 10 has a configuration in which the reference electrode 90 and the reference electrode electrical connecting member 110 are removed and bipolarized.

  In the test battery cell 10 of this embodiment, the connector member 112 is also removed, the reference electrode through-hole 108 formed so as to vertically penetrate the top plate portion 32 of the upper container 14, and the ring-shaped seal member 153. It is sandwiched by a blind plug 152 as a closing member so as to be directly detachable.

  In this embodiment, a metal material such as SUS304 is used for the blind plug 152, and a fluororesin material such as PTFE is used for the seal member 153. However, it can be changed for convenience depending on mechanical strength and chemical resistance. is there.

With this configuration, the reference electrode through-hole 108 formed so as to penetrate vertically through the top plate portion 32 of the upper container 14 is simply closed by the blind plug 152 that is a closing member. For example, a charge / discharge test can be performed.
(Example 5)

  FIG. 16 is an exploded perspective view of a test battery cell according to another embodiment of the present invention.

  The test battery cell 10 of this example has basically the same configuration as the test battery cell 10 of Example 1 shown in FIGS. 1 to 11, and the same reference numerals denote the same components. The detailed description is omitted.

  In the test battery cell 10 of this example, in the test battery cell 10 of Example 1 shown in FIGS. 1 to 11, as shown in FIG. 16, the reference electrode accommodating groove 88 is formed in the electrode holder 58. The electrode holder main body 60 is not formed with the reference electrode 90, the reference electrode terminal block 94, and the reference electrode connection portion holding portion 92 such as the reference electrode holding member 96.

  Further, the reference electrode terminal portion 106 such as the reference electrode through hole 108 and the reference electrode electrical connection member 110 is not formed.

In other words, the test battery cell 10 of this example is a bipolar cell, and is configured to perform, for example, a charge / discharge test.
(Example 6)

  FIG. 17 is an exploded perspective view of a test battery cell according to another embodiment of the present invention.

  The test battery cell 10 of this example has basically the same configuration as the test battery cell 10 of Example 1 shown in FIGS. 1 to 11, and the same reference numerals denote the same components. The detailed description is omitted.

  In the test battery cell 10 of this example, in the test battery cell 10 of Example 1 shown in FIGS. 1 to 11, as shown in FIG. A battery housing space 34 constituting a battery housing portion is not formed inside.

  For this purpose, as shown in FIG. 17, by increasing the depth of the electrode holder groove 18 of the lower container 16, a battery accommodating space 34 constituting a battery accommodating part is formed in the lower container 16. It is the composition which is.

  Further, a gas vent hole 38 is formed in the side wall 16a of the lower container 16, and a screw portion of the gas vent plug 40 is screwed into a screw hole of the gas vent hole 38 so that the gas vent plug 40 is A gas vent hole 38 is mounted.

  Further, a safety valve portion 44 having the same configuration as that of the first embodiment is formed on the side wall 16b on the other side facing the side wall 16a of the lower container 16 at a position facing the gas vent hole 38.

As described above, the battery accommodating space 34 constituting the battery accommodating portion is provided with the battery accommodating space 34 constituting the battery accommodating portion in the upper container 14, the lower container 16, or both the upper container 14 and the lower container 16. Can be formed.
(Example 6)

  18 is an exploded perspective view of a test battery cell according to another embodiment of the present invention, and FIG. 19 is a top view of the test battery cell of FIG. 18 with the upper container 14 removed.

  The test battery cell 10 of this example has basically the same configuration as the test battery cell 10 of Example 1 shown in FIGS. 1 to 11, and the same reference numerals denote the same components. The detailed description is omitted.

  The test battery cell 10 of this example has basically the same configuration as the test battery cell 10 of Example 5 shown in FIG. 17, and the upper container 14 has a flat plate shape and is placed inside the upper container 14. Is not formed with the battery accommodating space 34 constituting the battery accommodating portion.

  For this purpose, as shown in FIGS. 18 to 19, by increasing the depth of the electrode holder groove 18 of the lower container 16, the battery accommodating space 34 constituting the battery accommodating portion is formed in the lower container 16. It is the structure formed.

  Further, a safety valve portion 44 having the same configuration as that of the first embodiment is formed on the side wall 16a of the lower container 16.

  Furthermore, in the test battery cell 10 of this example, as shown in FIG. 18, the vent hole 38 is formed in the top plate portion 32 of the upper container 14, and the screw hole of the vent hole 38 is The screw part of the gas vent plug 40 is screwed, and the gas vent plug 40 is attached to the gas vent hole 38.

  Further, as shown in FIGS. 18 to 19, the reference electrode terminal portion 106 having the same configuration as that of the first embodiment is provided on the side wall 16 b on the other side facing the safety valve portion 44 of the side wall 16 a of the lower container 16. A first terminal portion 124 and a second terminal portion 128 are formed.

  Further, as shown in FIGS. 18 to 19, in the test battery cell 10 of this example, the reference electrode terminal block is not on the upper surface of the reference electrode terminal block 94 but on the side wall 16 b side of the lower container 16. A reference electrode connection hole 94 a for electrically connecting the reference electrode electric connection member 110 is formed on the side surface of the reference electrode 94. Further, the reference electrode holding member 96 is not formed with a long hole-shaped slit 96c.

  Further, as shown in FIGS. 18 to 19, in the test battery cell 10 of this embodiment, the side wall of the lower container 16, not the upper surface of the first terminal block 66 of the first connection portion holding portion 64. A first connection hole 66a is formed on the 16b side.

Similarly, as shown in FIGS. 18 to 19, in the test battery cell 10 of this example, not the upper surface of the second terminal block 78 of the second connection portion holding portion 76 but the lower container 16. A second connection hole 78a is formed on the side wall 16b side.
In this embodiment, the guide rod member 26 and the guide hole 28b are omitted, and instead, the screw hole 24, the fastening bolt through hole 28a, and the fastening bolt 132 are provided in the portion.

  As described above, the positions of the reference electrode terminal portion 106, the first terminal portion 124, the second terminal portion 128, the safety valve portion 44, and the gas vent hole 38 are not limited. The container 14 and the lower container 16) may be provided at any location, and the arrangement position is not limited at all.

  The preferred embodiment of the present invention has been described above. However, the present invention is not limited to this. For example, in the above-described embodiment, the present invention is applied to a so-called square prism-shaped test battery cell 10. However, various modifications can be made without departing from the object of the present invention, such as application to the test battery cell 10 having a substantially disk shape or other shapes.

  The present invention relates to a primary battery such as a manganese battery, an alkaline battery, a lithium battery, a lead storage battery, a nickel-cadmium battery, and the like used in electronic equipment such as a personal computer, a mobile phone, and a digital camera enclosed in a sealed container. It can be applied to secondary batteries such as nickel / hydrogen batteries and lithium ion batteries, double layer capacitors, capacitors and the like.

  More specifically, in such a storage battery, in order to know what voltage behavior is occurring inside the actual storage battery with respect to the contents in the enclosed container, for example, a reference electrode A conventional bipolar test using a test bipolar cell, a test battery cell used as a test tripolar cell, and a test tripolar cell to perform measurements such as positive and negative electrode potential measurements For example, as a test bipolar cell for conducting measurement tests such as measurement of the temperature inside the battery with a thermocouple, measurement of pressure, collection of gas generated inside, etc. It can be applied to the test battery cell used.

DESCRIPTION OF SYMBOLS 10 Test battery cell 12 Container main body 14 Upper container 16 Lower container 16a Side wall 16b Side wall 18 Electrode holder groove part 20a Inner sealing member 20b Outer sealing member 22 Flat plate part 24 Screw hole 26 Guide rod member 28 Fastening flange 28a For fastening bolt Through hole 28b Guide hole 30 Side wall 30a Side wall 30b Side wall 32 Top plate portion 34 Battery accommodating space 36 Battery accommodating portion 38 Gas vent hole 40 Gas vent plug 40a Knob portion 42 Seal member 44 Pressure valve portion 46 Gas exhaust hole 48 Pressure valve portion accommodating Recess 50 Seal holder 50a Seal member 50b Communication hole 52 Rupture plate 54 Press member 56 Press screw 56a Through hole 58 Electrode holder 60 Electrode holder body 62 Electrode housing recess 62a Electrode housing recess body 62b First groove 62c Second groove 64 Second 1 connection part holding part 66 1st Terminal block 66a First connection hole 68 First connection portion pressing member 70 First tightening screw 76 Second connection portion holding portion 78 Second terminal block 78a Second connection hole 80 Second connection portion pressing member 82 Second clamping screw 88 Reference electrode accommodating groove 90 Reference electrode 92 Reference electrode connection holding portion 94 Reference electrode terminal block 94a Reference electrode connection hole 94b Guide groove 96 Reference electrode holding member 96a Upper plate portion 96b Screw hole 96c Slit 96d Clamping screw 98 Reference electrode mounting portion 98a Vertical portion 98b Horizontal portion 100 Electrode holding member 102 Spring support recess 104 Compression spring 106 Reference electrode terminal portion 108 Reference electrode through hole 110 Reference electrode electrical connection member 110a Upper end portion 110b Lower end Portion 112 Connector member 113 Seal member 114 Through hole 116 Insulating tube 118 Inclined recess 1 0 Insulating ferrule 120a Through hole 122 Connector nut 122a Through hole 124 First terminal portion 126 First electrode electrical connection member 126a Upper end portion 126b Lower end portion 128 Second terminal portion 130 Second electrode electrical connection member 130a Upper end Portion 130b Lower end 132 Fastening bolt 134 Internal access connection 136 Internal access through hole 138 Gas pipe 138a Lower end 138b Upper end 140 Connector member 141 Seal member 142 Through hole 144 Inclined recess 146 Ferrule 146a Through hole 148 Connector nut 150 Blind ferrule 152 Blind plug 153 Seal member 200 Positive electrode part 202 Positive electrode connection part 203 One side 204 Positive electrode 206 Negative electrode part 208 Negative electrode connection part 209 One side 210 Negative electrode 212 Separator 214 Electrode laminated body 300 Test battery cell 302 Recess 304 Cell body 306 Lid 308 Protrusion 310 Test electrode accommodating portion 312 Electrolyte overflow reservoir 314 Flat portion 316 Concave groove 318 Flat portion 320 Spacer 322 Test electrode 324 Separator 326 Counter electrode 328 Counter electrode current collector plate 330 Pressure spring 332 Bolt 334 Nut 336 Current collector bolt

Claims (13)

A battery cell for testing provided with a sealed container for test evaluation of electrode materials used for storage batteries,
A container main body composed of an upper container and a lower container, which are configured to be detachable in a pair of upper and lower sides, and form a battery housing portion that constitutes a sealed space that houses the contents of the storage battery;
An electrode holder that is detachably disposed in the battery accommodating portion of the container body and accommodates the contents of the storage battery,
The electrode holder is
A separator that is interposed between the first electrode, the second electrode, and the first electrode and the second electrode, and holds the first electrode and the second electrode in an insulated state; An electrode housing recess for housing the electrolyte solution;
A first connection portion holding portion that detachably holds the connection portion of the first electrode outside the electrode housing recess;
A second connection portion holding portion for detachably holding the connection portion of the second electrode outside the electrode housing recess,
The container body is
A first terminal portion that is electrically connected to the connection portion of the first electrode held by the first connection portion holding portion, and is taken out of the container body;
A test battery cell comprising: a second terminal portion that is electrically connected to a connection portion of the second electrode held by the second connection portion holding portion and is taken out of the container body. The electrode holder is
A reference electrode disposed in the electrode housing recess of the electrode holder in an insulated state with the first electrode and the second electrode housed in an insulated state in the electrode housing recess of the electrode holder;
A reference electrode holding member that detachably holds the reference electrode;
The container body is
2. The test battery cell according to claim 1, further comprising a reference electrode terminal portion that is electrically connected to the reference electrode holding member and is taken out of the container main body.   The test battery cell according to claim 2, wherein a reference electrode housing groove for housing the reference electrode is formed in the electrode housing recess of the electrode holder.   4. The test battery cell according to claim 1, wherein the battery container is formed in the upper container, the lower container, or both of the upper container and the lower container. 5.   4. The test battery cell according to claim 2, wherein the reference electrode and the reference electrode terminal portion are removed to be bipolar. 5.   The test battery cell according to any one of claims 1 to 5, wherein the container body includes an internal access connection portion on which an internal access member such as a thermocouple or a gas pipe is detachably attached.   The test battery cell according to any one of claims 1 to 6, wherein the container body includes a gas vent plug for venting a gas generated in a battery housing portion of the container body.   The container body includes a safety valve section for releasing the gas to protect the container body when the gas generated in the battery housing portion of the container body exceeds a predetermined pressure. The battery cell for a test according to any one of claims 1 to 6.   The test battery cell according to any one of claims 1 to 8, wherein the test battery cell is a sealed container for test evaluation of an electrode material or the like used in a lithium ion secondary battery.   The test battery cell according to any one of claims 1 to 9, wherein the reference electrode is arranged linearly in parallel to one side of the first electrode or the second electrode.   The test battery cell according to claim 1, wherein the first electrode and the second electrode of the storage battery have a square shape.   The shape of the first electrode and the second electrode of the storage battery is L-shaped, and can be directly energized to the outside through the connection portion of the first electrode and the connection portion of the second electrode. It is comprised so that it may be. The battery cell for a test in any one of Claim 1 to 11 characterized by the above-mentioned. Remove the reference electrode and the terminal portion for the reference electrode,
3. The test battery cell according to claim 2, further comprising an internal access connecting portion that detachably mounts an internal access member such as a thermocouple or a gas pipe instead of the reference electrode terminal portion.

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