JP2010020921A - Power storage cell, and power storage cell module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power storage element which is usable for different usages such as high output, high capacity, low temperature and high temperature, and high in degree of freedom of installment by having an integrated structure. <P>SOLUTION: In a power storage cell 41, electrode laminates (81, 82) in which one unit of power generation elements (30a, 30b) wherein a sheet-like positive electrode 10p and negative electrode 10n are opposingly arranged via a separator 20 are plurally laminated is airtightly sealed in an outer case 60 of a laminate film together with an electrolytic solution containing a lithium salt, and lithium ions originated from lithium metal is stored on the negative electrode side in advance, and a plurality kinds of power generation elements different in characteristics exist mixedly in the electrode laminates. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a storage cell and a storage cell module. Specifically, the present invention relates to a power storage cell or a power storage cell module that can be used with different characteristics.

  Conventionally, storage cells and storage cell modules that can be used in different applications and environments, such as high capacity and high output, low temperature environment and high temperature environment, have been considered ideal. However, that ideal has not been realized at present. For example, a known electric double layer capacitor has a small capacity, and if it is intended to have a high capacity, it is difficult to reduce the size of a power storage cell or a power storage cell module in which the cells are integrated in series or in parallel.

Therefore, as described in the following patent document, a stacked secondary battery (Patent Document 1) and a hybrid element (Patent Document 2) in which a secondary battery and an electric double layer capacitor are mixed have been proposed. In addition, a hybrid power supply element in which a lithium secondary battery and a capacitor are mixed in one storage cell (Patent Document 3) has been proposed.
JP-A-8-287970 JP-A-10-294135 Japanese Patent Laid-Open No. 2003-100333

  The power storage elements described in the above patent documents are proposed in order to satisfy both contradictory characteristics of high capacity characteristics and high output characteristics. Basically, high capacity such as a lithium secondary battery is used. This is a combination of a battery and a high output capacitor such as an electric double layer capacitor. However, the characteristics of the battery are remarkably deteriorated in a high-temperature environment. For example, when the battery is used for storing regenerative electric power of an automobile, it is difficult to install the battery and the capacitor in an engine room where the temperature is high. Therefore, the battery part and the capacitor part are separated, and the battery is installed in a space provided for other uses such as a luggage compartment, or both are installed in these spaces. This impairs the original use of automobiles for carrying people and luggage.

  In addition, the battery and the capacitor have different charge / discharge characteristics. For example, as shown in FIG. 13, the discharge characteristic of the battery reaches a discharge end voltage at which the voltage suddenly drops at a certain point and stops operating as a battery (A), whereas the capacitor gradually discharges to the end voltage. Characteristic (B). Therefore, it is necessary to connect a circuit for charging / discharging to each of the battery and the capacitor, and these circuits have completely different designs according to their charging / discharging characteristics. Therefore, the power storage element in which the battery and the capacitor are combined has a problem that the cost required for the additional circuit increases.

  In recent years, a power storage element called a lithium ion capacitor has been proposed in order to eliminate the drawbacks of the electric double layer capacitor. This electricity storage device includes a sheet-like positive electrode obtained by applying a positive electrode material capable of reversibly carrying lithium ions or anions on a sheet-like current collector, and a negative electrode capable of inserting and extracting lithium ions. An electrode laminate formed by laminating at least one unit of power generation elements, including a lithium salt, with a power generation element formed by opposing a sheet-like negative electrode formed by applying an electrode material with a separator therebetween, as one unit In addition to hermetically sealing with the electrolyte, lithium ions originating from lithium metal are previously diffused into the negative electrode.

  And this lithium ion capacitor can be charged quickly like an electric double layer capacitor, and the lithium ion is occluded in advance in the negative electrode, so the potential of the negative electrode is lowered, a large voltage can be obtained, and a high energy capacity. Can be obtained. Therefore, the capacity can be increased or the output can be increased, and it is expected to be used for a load leveling device for wind power generation, a power failure countermeasure device, a power storage application for regenerative power in an automobile, and the like. However, this lithium ion capacitor does not achieve both high capacity and high output. That is, the increase in capacity and the increase in output are mutually contradictory.

  The present invention has been made in view of the background and problems described above, and its purpose is different in storage cells and storage cell modules based on lithium ion capacitor technology, such as high output and high capacity, low temperature and high temperature. The purpose of this is to make it possible to use it for various purposes and to increase the degree of freedom of installation by having an integral structure.

  In order to achieve the above object, the present inventor first gave up trying to make contradictory characteristics compatible with one power generation element, and changed to the idea of coexisting contradictory characteristics. When the lithium ion capacitor is viewed as a single power generation element, attention is paid to the fact that the characteristics can be set flexibly to some extent according to the electrode material and electrode structure. And this invention was created based on the said idea and the said attention point.

According to the present invention, an electrode laminate formed by laminating a plurality of one unit of power generation elements in which a sheet-like positive electrode and a negative electrode are arranged to face each other via a separator is sealed in an outer package of a laminate film together with an electrolyte containing a lithium salt. A storage cell that is sealed and previously occluded lithium ions originating from lithium metal on the negative electrode side,
The electrode stack is a storage cell in which a plurality of types of power generation elements having different characteristics are mixed.

  In the above storage cell, the positive and negative electrodes in the electrode stack are connected to the electrode terminals collectively for each power generation element having the same characteristics, and are connected to each type of power generation element having different characteristics. The terminals may be individually led out of the exterior body.

  The plurality of types of power generation elements having different characteristics may be power storage cells including two types of power generation elements having relatively high capacity characteristics and power generation elements having high output characteristics.

  Alternatively, the plurality of types of power generation elements having different characteristics may include two types of power generation elements for low temperature having relatively low temperature characteristics and power generation elements for high temperature having excellent high temperature characteristics. In the low-temperature power generation element, the negative electrode material is more preferably lithium titanate.

  In any of the above storage cells, the positive and negative electrodes in the electrode stack are connected to the electrode terminals collectively for each power generation element having the same characteristics, and connected to each type of power generation element having different characteristics. It can also be set as the electrical storage cell from which the electrode terminal currently led out | leaded out of the exterior body separately.

  In addition, a predetermined number of storage cells from which the electrode terminals are individually led out of the exterior body are stacked and integrated, and the power generation elements having the same characteristics are connected in series, and the power generation elements connected in series A storage cell module to which an individual charge / discharge circuit is connected is also within the scope of the present invention.

  In the scope of the present invention, in addition to the above-mentioned power storage cell module, an electrode laminate in which one unit of power generation elements in which a sheet-like positive electrode and a negative electrode are arranged to face each other via a separator is laminated with a lithium salt In an energy storage cell module in which a predetermined number of energy storage cells in which lithium ions originating from lithium metal are preliminarily occluded are stacked and integrated on the negative electrode side, together with an electrolyte solution containing A power storage cell module in which a plurality of types of power storage cells having different characteristics are mixed is also included.

  And in the said electrical storage cell module, the electrical storage cell provided with the electrode laminated body comprised with the electrical power generation element which has a relatively high capacity | capacitance element in multiple types of electrical storage cell from which the said characteristic differs, and electric power generation which has a high output characteristic It is good also as two types of electrical storage cells provided with the electrode laminated body comprised by the element are included.

  The plurality of types of power storage cells having different characteristics include a low temperature power storage cell having a power stack composed of power generation elements having relatively excellent low-temperature characteristics and an electrode stack composed of power generation elements having excellent high-temperature characteristics. It can also be set as the electrical storage cell module containing two types of the electrical storage element for high temperature provided with the body. More preferably, the negative electrode material in the power generation element is lithium titanate.

  In addition, an electricity storage cell in which electricity storage cells each having an electrode stack composed of power generation elements having the same characteristics are connected in series to constitute an electricity storage cell group, and an individual charge / discharge circuit is connected to each electricity storage cell group It can also be a module.

  According to the electricity storage cell or the electricity storage cell module of the present invention, different characteristics can be achieved at the same time, and an integral installation form can be adopted. Further, it is not necessary to greatly change the additional circuit such as the charge / discharge circuit for each characteristic, and it is possible to suppress an increase in cost of the additional circuit.

=== Characteristics of lithium ion capacitor ===
The above-described power storage element called a lithium ion capacitor can realize its characteristics as long as it has one of high capacity and high output. As shown in FIG. 1, the discharge characteristic (A) of the high capacity type lithium ion capacitor is the same as the discharge characteristic (B) of the high output type lithium ion capacitor, and the voltage gradually decreases with discharge. Then, gradually go to the end voltage. In addition, in a high temperature environment, it is possible to maintain power supply stably while ensuring safety by simply lowering the discharge voltage.

=== Basic structure of storage cell ===
FIGS. 2A and 2B show the structure of a power generation element (electrode body) for one unit, which is the basic configuration of the lithium ion capacitor that is the subject of the present invention. (A) is a top view of the electrode body 30, (B) is an enlarged view of the aa arrow cross section in (A). In addition, in this figure, although the structure for occluding lithium ions in the negative electrode 10n is not clearly shown, for example, Japanese Patent No. 3485935 and the present inventor filed earlier regarding the method of occluding lithium ions. A method described in Japanese Patent Application No. 2007-293265 is conceivable.

  The electrode body 30 has a structure in which a positive electrode 10p and a negative electrode 10n obtained by coating each electrode material (12p, 12n) on a substantially rectangular sheet-shaped current collector (11p, 11n) are stacked with a separator 20 interposed therebetween. It has become. In addition, a convex region (external terminal portions: 13p, 13n) where an electrode material is not applied as a current entrance / exit at the time of charging / discharging is formed on one side of the substantially rectangular current collector sheet (11p, 11n). Yes. An electrode laminate is configured by laminating several tens of units with this electrode body as one unit, and the electrode laminate is sealed together with an electrolytic solution in an outer package of a laminate film, which is called a storage cell.

  FIG. 3 shows an example of the storage cell. The electrode laminate and the electrolyte solution are sealed in a laminate film outer package 60, and a metal flat plate serving as a terminal for charging the electricity storage cell 40 or taking out the electricity stored in the cell 40. The electrode terminal board 50 which consists of is exposed out of the exterior body 60.

  4A and 4B show a side sectional view of the electrode laminate and an outline of the connection structure of the electrode terminal plate 50 in the exterior body 60, respectively. The electrode laminate 80 has a structure in which a plurality of electrode bodies 30 are laminated, and the external terminals (13p, 13n) in each electrode body 30 are laminated with the same poles, and the external terminals of the respective poles in the laminated state. The parts (13p or 13n) are collectively connected to the electrode terminal plate 50 by ultrasonic welding or heat fusion. And the front-end | tip of the electrode terminal board 50 is exposed outside the exterior body 60. As shown in FIG.

=== First Embodiment ===
1st Embodiment in this invention is an electrical storage cell which mixed the electrode body of a different characteristic in one exterior body. 5A and 5B illustrate the electrode stack in the electricity storage cell. In this example, the electrode laminated body (81, 82) in which two electrode bodies (30a, 30b) having different characteristics are mixed is shown. (A) is a structure in which two different electrode bodies (30a, 30b) are separated in the laminated electrode body 81, and the electrode bodies (30a, 30b) having the respective characteristics are laminated. Two electrode body groups (80a, 80b) are formed, and the two electrode body groups (80a, 80b) are further stacked to form an electrode stacked body 81. The electrode body groups (80a, 80b) having different characteristics may be electrically separated by providing an insulating layer between the layers d.

  (B) is a structure in which electrode bodies (30a, 30b) having different characteristics are laminated on an integrated electrode laminate 82, and the electrode structure is changed or applied on the front and back of the current collectors (11p, 11n). The electrode bodies (30a, 30b) having different characteristics are mixed in one electrode laminated body 82 by changing the electrode material (12p, 12n) or the like.

=== Second Embodiment ===
A second embodiment of the present invention is shown in FIG. The second embodiment is a storage cell module 1 that is integrated by stacking a plurality of storage cells (40a, 40b) and storing them in a housing 2, and is stored in one exterior body 60. All the electrode stacks are made up of power generation elements having the same characteristics. In this example, a storage cell module 1 in which two types of storage cells (40a, 40b) having different characteristics are mixed is shown. Here, the storage cell module 1 in which the storage cells (40a, 40b) are connected in series and the terminal plate 3 corresponding to a pair of positive and negative electrodes is led out of the housing 2 is shown.

=== External terminal connection ===
For example, even in the case where electrode bodies and storage cells with different characteristics are mixed, in applications where discharge is performed for a long time at low output, the electrodes of the electrode bodies and storage cells are distinguished for each different characteristic, and the charge / discharge circuit is individually set. There is no need to connect. Therefore, as in the conventional power storage cell 40 shown in FIGS. 2 and 3, the external terminal portions (13p, 13n) are collectively connected to the electrode terminal 50 for each positive and negative electrode, or an example of the second embodiment. As shown in FIG. 6, all the storage cells (40a, 40b) may be connected in series as in the storage cell module 1 shown in FIG.

  However, in the case where electrode bodies and storage cells for high capacity use and high output use are mixed, it is conceivable to charge or discharge the electrode bodies and storage cells for each use with individual circuits. In the case where one power storage cell (40a, 40b) is composed of electrode bodies having the same characteristics as in the second embodiment, as shown in FIG. 7, the power storage cells (40a, 40b) having the same characteristics as each other. Is connected in series to form a storage cell group (41a, 41b), and a positive and negative terminal plate (3a, 3b) may be provided for each series connection. And what is necessary is just to connect an individual charging / discharging circuit (100a, 100b) to each terminal board (3a, 3b) for every characteristic. Here, each charging / discharging circuit (100a, 100b) is connected to a load or a power source for charging 120 via a control circuit 110, and the control circuit 110 is connected to a storage cell group (41a, 41b) to be charged / discharged. Accordingly, the configuration is shown in which the operation of switching the path between the charging power source side (load side) 120 and the corresponding charging / discharging circuit (100a, 100b) is performed.

  On the other hand, in the first embodiment, electrode bodies (30a, 30b) having different characteristics are mixed in one electrode laminate (81, 82), and the protruding direction of the external terminal portions (13p, 13n) and the electrodes Some ideas are required for the connection method of the terminal 50 and the like. FIG. 8 shows the connection structure of the electrode terminals 50 when the electrode terminals 50 are connected to the electrode bodies (30a, 30b) having different characteristics. In this example, the external terminal portions (13p, 13n) in the two types of electrode bodies (30a, 30b) having different characteristics are respectively connected to the individual electrode terminals (50a, 50b) (A). In addition, since the external terminal portions (13p, 13n) of the positive and negative electrodes in each electrode body (30a, 30b) are projected in opposite directions, the electrode bodies (30a, 30b) having different characteristics are connected to the respective external terminals. If the layers (13p, 13n) are stacked so that the projecting directions thereof are orthogonal, the external terminal portions (13p, 13n) in the electrode bodies (30a, 30b) having different characteristics and the electrode terminals (50a, 50b) do not touch each other. And in the electrical storage element 41 which accommodated the electrode laminated body (81, 82) in the exterior body 60, the electrode terminal (50a, 50b) connected to the electrode body (30a, 30b) of each characteristic is a rectangular bag, respectively. What is necessary is just to derive | lead-out from 4 sides of the shaped exterior body 60 (B).

  Further, in the first embodiment, as shown in the plan view (A) and the side sectional view (B) of FIG. 9, the positive and negative external terminal portions (13p, 13n) in the electrode body 31 are in the same direction. A protruding structure is also conceivable. Even in such a case, as shown in FIG. 10, the electrode laminate 83 is configured such that the external terminal portions (13p, 13n) of the electrode bodies (31a, 31b) having different characteristics protrude in different directions. The electrode terminals (50a, 50b) are connected to the external terminal portions (13p, 13n) for each of the electrode bodies (31a, 31b) having the characteristics (A). The electrode laminated body 82 is housed in the exterior body 60, and the electrode terminals (50a, 50b) corresponding to the electrode bodies (31a, 31b) having different characteristics are different from each other in the opposite sides of the rectangular bag-shaped exterior body 60. What is necessary is just to comprise in the direction and comprise the electrical storage cell 42. FIG.

  The storage cells (41, 42) shown in FIG. 8B and FIG. 10 are used in the state of a storage cell module by stacking a plurality of storage cells, as in the second embodiment. It is normal. Therefore, when a plurality of these storage cells (41, 42) are stacked to form a storage cell module, the electrode terminals (50a) led out of the exterior body 60 for each electrode body (30a, 30b) of each characteristic. 50b) may be connected in series.

=== About high capacity characteristics and high output characteristics ===
In order to reconcile the two contradictory characteristics of high capacity and high output, for example, in an electrode body or a storage cell (high capacity part) corresponding to a high capacity application, more charges can be stored. Activated carbon having a large specific surface area is used as the electrode material for the positive electrode, and graphite or the like may be used for the negative electrode material. And what is necessary is just to increase the application quantity of an electrode material.

  On the other hand, in electrode bodies and energy storage cells (high output portions) corresponding to high output applications, it is desirable to reduce the thickness of the electrode by thinly applying the electrode material or to reduce the particle diameter of the electrode material. . In the high output portion, it is necessary to reduce the voltage to 0 V by, for example, preliminarily storing the irreversible capacity of lithium ions in the negative electrode. It is also conceivable to reduce the resistance between the current collector that serves as the entrance and exit of electricity and the electrode material by placing a current collector in the electrode material.

  In the high-capacity part and the high-power part, the discharge starts from the high-power part, reaches the end voltage before using the power stored in the high-capacity part, and the subsequent discharge stops. . Therefore, when a high capacity part and a high output part are mixed, a charge / discharge circuit corresponding to each characteristic, that is, a cell balance circuit for charging so that the charging voltage of each electrode body and power storage element becomes uniform is individually provided. It is desirable to provide in.

  FIG. 11 shows a general cell balance circuit connected to each of the high output unit and the high capacity unit. At the time of discharging, a load is connected to the input terminal 120 connected to the charging power source in these circuits. In addition, this figure shows a circuit that charges and discharges four unit cells (c1 to c4) with a predetermined number of electrode bodies and one storage cell as one unit (unit cell). (A) is a cell balance circuit for a high-capacity part, and turns on / off MOSFETs (t1 to t4) corresponding to the respective unit cells (c1 to c4) according to a control signal from the microcomputer 130; Depending on the on / off state, the storage capacities of the unit cells (c1 to c4) are mutually charged / discharged through the resistors (R1 to R4), thereby aligning the voltages of the unit cells (c1 to c4). The two MOSFETs (t5, t6) inserted in the path from the load side (charging power source side) 120 are an overvoltage protection transistor (t5) and a low voltage protection transistor (t5) that are turned on / off by the control of the protection IC. t6).

  On the other hand, (B) is a cell balance circuit for a high output unit, and four unit cells (c1 to c4) are grouped into two groups (c1 and c2, and c3 and c4), and two units in each group. The voltages are made uniform between the cells (c1 and c2, and c3 and c4). In this example, two MOSFETs (t1 and t2, and t3 and t4) that are complementarily turned on / off according to the two H / L states of the reference pulse 150 are used as two unit cells (c1 and c1) in a set. The storage capacities of c2, and c3 and c4) are mutually charged and discharged via the inductors (L1, L2). Note that the overvoltage protection transistor (t5) and the low voltage protection transistor (t6) may be turned on / off by comparison with a control signal from the protection IC or a reference voltage.

  Needless to say, the configuration of the charge / discharge circuit is not limited to the illustrated circuit, and can be changed as appropriate. As another circuit configuration for achieving both high capacity and high output characteristics, a configuration in which only the high output portion is connected to the load and the high capacity portion is used as a power source for supplying power to the high output portion is also considered. It is done.

=== Low temperature characteristics and high temperature characteristics ===
In addition to high capacity and high output, the two contradictory characteristics are a low temperature characteristic that excels in characteristics in a low temperature environment and a high temperature characteristic that enables stable output even in a high temperature environment. Fig. 12 shows the discharge characteristics of an electrode body excellent in low-temperature characteristics and a storage cell (low temperature part) composed of the electrode body, an electrode body excellent in high temperature characteristics and a power storage cell (high temperature part) composed of the electrode body. It was. In this figure, the capacity at each temperature is shown as a ratio with respect to the capacity at 25 ° C. being 100%. (A) is a characteristic of each of the low temperature part and the high temperature part, and (B) is a characteristic of the electricity storage cell or the electricity storage cell module provided with both the low temperature part and the high temperature part. By mixing the low temperature part and the high temperature part, it can be seen that it operates stably over a wide temperature range from low temperature to high temperature.

  In order to obtain an electrode body with excellent low-temperature characteristics, it is conceivable to use lithium titanate for the negative electrode. Lithium titanate can have a potential with respect to lithium metal of 1.5 V or more, and lithium metal is difficult to deposit even during charge and discharge at low temperatures, thus ensuring safety. The voltage between the positive and negative electrodes is 3.8 v, which is almost the same as 3.5 v of a conventional lithium ion capacitor using a carbon material. Therefore, there is no practical problem even if the high temperature part and the low temperature part are connected to the same charge / discharge circuit. Of course, the electrode terminals are individually connected to each of the high temperature part and the low temperature part, and a circuit for measuring the ambient temperature and a circuit for switching the charge / discharge target between the high temperature part and the low temperature part according to the measured temperature are added. May be.

  Note that the two characteristics, which are contradictory to each other, such as the low temperature characteristic and the high temperature characteristic, and the high capacity and high output, are not necessarily absolute standards but are relative. That is, in the case of a power storage cell or a power storage module for achieving both high capacity and high output, an electrode body or power storage cell having a large capacity is classified as a high capacity portion, and an electrode body capable of charging / discharging at a higher current or What is necessary is just to classify an electrical storage cell into a high output part.

=== Other Embodiments ===
In this invention, the electrical storage cell and electrical storage cell module which mixed 3 or more types of different characteristics are also assumed. Further, as the different characteristics, not only the above-described high output, high capacity, high temperature, and low temperature but also various other characteristics (cycle characteristics, etc.) can be considered. In addition, the number of electrode bodies having different characteristics mixed in one electrode stack or the number of storage cells having different characteristics in one storage cell module may not be the same. For example, rather than the number of electrode bodies and storage cells included in the high-capacity part, the number of those included in the high-power part is relatively increased so that the total capacity of the high-capacity part and the total capacity of the high-power part are aligned. Can be considered.

It is a discharge characteristic figure of a lithium ion capacitor. It is the top view (A) and side sectional view (B) of the electric power generation element used as the basic composition of the said lithium ion capacitor. It is an external view of a general electrical storage cell. It is the schematic structure figure (A) of the electrode laminated body which made the said electric power generation element the multilayer structure, and the enlarged view (B) of the terminal structure of the external terminal part in the said laminated body. It is a schematic structure figure of the electrode layered product with which the electrical storage cell in the 1st example of the present invention is provided. It is a schematic structure figure of the electrical storage cell module in the 2nd example of the present invention. It is a figure which shows the example of a connection of the charging / discharging circuit in the electrical storage cell module of the said 2nd Example. It is a figure which shows the example of a connection of the external terminal part and electrode terminal in the electrical storage cell of the said 1st Example. It is a figure which shows the modification of the said electric power generation element. It is a figure which shows the example of a connection of the external terminal part and electrode terminal in the electrical storage cell which applied the modification of the said electric power generation element to the said 1st Example. It is the schematic of the charging / discharging circuit connected to each of the electrical storage cell and electric power generation element of a different characteristic, (A) is a circuit diagram corresponding to a high capacity | capacitance characteristic, (B) is a circuit diagram corresponding to a high output characteristic It is. FIG. 2 is a discharge characteristic diagram (A) of an energy storage cell or an energy storage cell module excellent in low temperature characteristics and a high temperature property, and a discharge characteristic diagram (B) of an energy storage cell or an energy storage cell module having both low temperature characteristics and high temperature characteristics. It is the discharge characteristic figure (A) of a secondary battery, and the discharge characteristic figure (B) of a capacitor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage cell module 2 Housing | casing 3 Terminal board 10p Positive electrode 10n Negative electrode 11p, 11n Current collector 12p Electrode material for positive electrodes 12n Electrode material for negative electrodes 13p, 13n External terminal part 20 Separator 30, 30a, 30b 31 Power generation element (electrode body)
40-42 Power storage cell 50, 50a, 50b Electrode terminal 80-82 Electrode laminate

Claims (12)

While sealing and sealing the electrode laminate formed by laminating a plurality of one-unit power generation elements in which a sheet-like positive electrode and a negative electrode are arranged opposite to each other with a separator interposed therebetween, together with an electrolyte containing a lithium salt, A storage cell in which lithium ions originating from lithium metal are previously occluded on the negative electrode side,
A power storage cell comprising a plurality of types of power generation elements having different characteristics mixed in the electrode laminate.   The positive and negative electrodes in the electrode stack are connected to the electrode terminals for each power generation element having the same characteristics, and the electrode terminals connected to each type of power generation element having different characteristics are individually packaged. The electrical storage cell according to claim 1, wherein the electrical storage cell is led out of the body.   The power storage device according to claim 1, wherein the plurality of types of power generation elements having different characteristics include power generation elements having relatively high capacity characteristics and power generation elements having high output characteristics. cell.   The plurality of types of power generation elements having different characteristics include two types of power generation elements for low temperature having relatively low temperature characteristics and power generation elements for high temperature having excellent high temperature characteristics. The electrical storage cell as described in.   The electricity storage cell according to claim 4, wherein the low-temperature power generation element has a negative electrode material made of lithium titanate.   The positive and negative electrodes in the electrode stack are connected to the electrode terminals for each power generation element having the same characteristics, and the electrode terminals connected to each type of power generation element having different characteristics are individually packaged. The electrical storage cell according to claim 1, wherein the electrical storage cell is derived outside the body.   A predetermined number of power storage cells according to claim 6 are stacked and integrated, and the power generation elements having the same characteristics are connected in series, and a separate charge / discharge circuit is connected to each power generation element connected in series An electricity storage cell module characterized by being made.   An electrode laminate formed by laminating one unit or more of a power generation element in which a sheet-like positive electrode and a negative electrode are opposed to each other with a separator interposed therebetween is hermetically sealed in an outer package of a laminate film together with an electrolyte containing a lithium salt. In addition, a power storage cell module in which a predetermined number of power storage cells in which lithium ions originating from lithium metal are previously occluded is stacked and integrated on the negative electrode side, and a plurality of types of power storage cells having different characteristics are mixed. A storage cell module characterized by comprising: The plurality of types of power storage cells having different characteristics include a power storage cell including an electrode stack composed of power generation elements having relatively high capacity characteristics, and an electrode stack composed of power generation elements having high output characteristics. The power storage cell module according to claim 8, wherein two types of power storage cells including:   The plurality of types of power storage cells having different characteristics include a low temperature power storage cell having a power stack composed of power generation elements having relatively excellent low-temperature characteristics and an electrode stack composed of power generation elements having excellent high-temperature characteristics. The power storage cell module according to claim 8, comprising two types of high-temperature power storage elements including a body.   The power storage cell module according to claim 10, wherein the low-temperature power storage cell is configured such that a negative electrode material in the power generation element is lithium titanate.   A storage cell group is formed by connecting storage cells each having an electrode stack composed of power generation elements having the same characteristics to form a storage cell group, and an individual charge / discharge circuit is connected to each storage cell group. The storage cell module according to claim 8 to 11.