JP2006278263A - Power storage device and its packaging structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power storage device and its packaging structure capable of protecting the power storage device, facilitating handling, making a package small and lightweight, and enhancing vibration resistance. <P>SOLUTION: A power storage device cell fixing the joints of electrode terminals 4, 5 with an adaptor 10 is housed in two frames 21 to be joined with each other, and the adaptor 10 is pressed by the frames and interposed between the frames, and a power storage part 2 is floated around the adaptor 10 to the frames. Thereby, the handling of the power storage device cell is facilitated, positioning of the power storage device cell to the frames 21 is facilitated, and the mounting workability is enhanced. Even when outside force is applied to the frames 21, direct apply of stress to the power storage device cell 1 can be prevented, the power storage device cell 1 is effectively protected, and the package formed by laminating the power storage device cell and the frames is made small and lightweight, and the vibration resistance of the package is enhanced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a planar power storage unit in which an electrode terminal protrudes outside from a sealing unit that seals a power storage unit, and a package structure thereof.

  In recent years, flat power storage bodies having a substantially flat rectangular shape such as lithium ion secondary batteries and electric double layer capacitors have been put into practical use, and are considered promising as power sources for various devices due to their high energy density and compactness. Yes. This type of flat power storage unit is formed by sealing and sealing a laminate of internal electrodes and electrolyte layers with, for example, a sheet-like laminate film in which the surface of an aluminum-based metal layer is insulation-coated with a resin layer. In many cases, a predetermined number of cells are connected according to specifications, capacity specifications, etc., stored in a frame, and used as a packaged assembled battery.

  However, since the laminate-type power storage unit has a configuration in which the power storage unit is simply sealed with a laminate film as described above, the rigidity is poor, and when physical stress is applied, the stress is likely to concentrate in one place. For this reason, if some force is applied during the packaging step or during use as an assembled battery, the power storage unit (inside) may be partially deformed to cause a problem.

  In addition, the laminate type power storage unit has a structure that is likely to vary in outer dimensions and cannot be expected to be accurate, so it is difficult to fix the position to the frame, and when the power storage unit and the frame are stacked alternately and packaged In this case, the thickness variation of the power storage unit is integrated, and the package size greatly varies.

  For example, as shown in FIG. 23, when a plurality of power storage cells 100 in which the power storage unit 101 is sealed with a sealing unit 102 such as a laminate film is connected in series to form a module, depending on how the power storage cell 100 is handled. The electrode terminals 103 and 104 exposed to the outside from the sealing portion 102 are bent from the boundary portion with the sealing portion 102, the electrode terminals are broken, or the sealing portion 102 is opened to lower the sealing performance. There is a fear.

  As shown in FIGS. 24 and 25, when the battery cell 100 is stored by fitting the two frame bodies 105, the power storage unit 101 is pressed by the frame body 105 depending on the variation in the thickness of the power storage unit 101. On the contrary, the sealing portion 102 may be pressed by the frame body 105. Therefore, as illustrated in FIG. 26, when the power storage unit module 110 is configured by alternately stacking the power storage cells 100 and the frame 106 using the frame 105 as the frame 106 corresponding to the stack, the thickness of the power storage unit 101 is increased. The variation in the height is integrated, and the variation in the height dimension S as a module increases.

  In addition, since the dimensional accuracy of the tapered surface from the power storage unit 101 to the sealing unit 102 of the power storage cell 100 cannot be expected, it is difficult to align the power storage cell 100 with respect to the frame body 106, and as shown in FIG. When the position of the power storage unit 101 is shifted every time and an external force is applied to the module, not only is the stress easily applied to the power storage cell 100, but also stress is applied to the boundary between the sealing unit 102 and the electrode terminals 103 and 104. Will concentrate.

In order to cope with this, Patent Document 1 discloses that the heat fusion part (sealing part) sandwiching the electrode terminal lead is fixed by the gripping members provided on the upper and lower sides, thereby the heat fusion part (sealing part). Patent Documents 2 and 3 disclose vibration resistance by disposing a filler such as a resin between the battery (power storage unit) and the case. A technique for ensuring the above is disclosed.
JP 2004-63278 A JP 2003-272588 A JP 2004-71281 A

  However, in the technique disclosed in Patent Document 1, although the sealing performance of the sealing portion can be secured, it is possible to prevent the stress itself from being applied to the base portion that is the boundary portion between the sealing portion and the electrode terminal. It is difficult to cope with breakage due to stress concentration at the base of the electrode terminal.

  The technologies disclosed in Patent Document 2 and Patent Document 3 can fix the power storage cell in the case, but do not deal with problems such as ease of assembly to the case and dimensional variation after assembly. Further, not only does the weight of the module (package) increase due to the filling of the resin, but it is disadvantageous that the heat of the power storage cell escapes to the outside through the resin when it is desired to keep the power storage cell at a low temperature. Furthermore, even if an elastic resin is filled, a large contact area with the power storage cell requires a large stress to deform the resin, and there is a limit to the vibration absorption effect.

  The present invention has been made in view of the above circumstances, and provides a power storage unit capable of protecting the power storage unit and facilitating handling, and reducing the size and weight of the package and improving vibration resistance, and a package structure thereof. The purpose is to do.

  In order to achieve the above object, a power storage unit according to the present invention is a planar power storage unit in which an electrode terminal connected to the power storage unit protrudes from a sealing unit that seals the power storage unit to the outside. An adapter for fixing the boundary portion is interposed at a boundary portion between the electrode portion and the electrode terminal exposed from the sealing portion.

  The adapter is formed of two members that clamp and fix the boundary between the sealing portion and the electrode terminal, or one member that is provided with a slit through which the sealing portion can be inserted through the electrode terminal. can do. In addition, the adapter can be provided with a connector contact that conducts to the electrode terminal, and a temperature sensor that detects the temperature of the electrode terminal can be incorporated. When a plurality of power storage units are connected in series, it is desirable to interpose a spacer for fixing the electrode terminal between adjacent adapters.

  A package structure of a power storage unit according to the present invention includes a frame body that stores and holds the above-described power storage unit, fixes the adapter with the frame body, and holds the power storage unit floating from the frame body.

  The frame body may be constituted by a first frame body for pressing the adapter from one side and a second frame body for pressing the adapter from the other side facing the first frame body. The first frame body and the second frame body can be coupled by fitting the adapter to the first frame body and the second frame body. Moreover, external force can be absorbed by forming an adapter with an elastic body.

  Furthermore, you may fill with a foam between an electrical storage body and a frame. When filling the foam, the side of the sealing portion on the side where no electrode terminal is present is bent into a round or acute angle and fixed three-dimensionally with the foam to increase the fixing strength of the power storage unit. Can be improved.

  Further, it is desirable to provide a portion where no foam is provided between the power storage body and the frame, and this portion where no foam is provided can be used as a fluid passage through which a fluid flows. Furthermore, by providing a part where the foam is not provided in a part of the sealing part, it can be used for degassing when a gas is generated and expanded inside the power storage unit.

  In addition, when a power storage module is configured by laminating a frame that stores a power storage unit and an adapter, the number of connections in which the maximum voltage in which the power storage units are connected in series becomes a voltage that can ensure safety against electric shock is the module. It is desirable to provide an output connector as a unit. In the case where a plurality of power storage modules are connected and installed in a vehicle, it is desirable that the plurality of power storage modules be held by an outer case and installed via an elastic body.

  The present invention can protect the power storage unit to facilitate handling, and can reduce the size and weight of the package and improve vibration resistance.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 22 relate to an embodiment of the present invention, FIG. 1 is a perspective view of power storage cells connected in series, FIG. 2 is an explanatory view showing a state of electrode terminals of the power storage cells, and FIG. 3 is a connector. 4 is an enlarged view showing a connector contact, FIG. 5 is an explanatory view showing an integrated adapter, and FIG. 6 is an explanatory view showing an example in which a spacer is interposed between adjacent adapters. 7 is an explanatory view showing the distance between the adapter and the spacer and the bending position of the electrode, FIG. 8 is an explanatory view showing the storage of the battery cell in the frame, and FIG. 9 is a cross section of the state in which the battery cell is stored in the frame FIG. 10, FIG. 10 is an explanatory diagram of a power storage module in which a power storage cell and a frame are stacked, FIG. 11 is an explanatory diagram showing the miniaturization of the frame, and FIG. 12 is an explanatory diagram showing the influence of external force on the power storage module. 13 is an explanatory view showing a modification of the adapter attached to the battery cell. FIG. 14 is an explanatory view showing a power storage module using a frame corresponding to the adapter of FIG. 13, FIG. 15 is an explanatory view showing a modified example in which the fitting property between the adapter and the frame is improved, and FIG. FIG. 17 is a cross-sectional view showing an example in which a foam is filled between the cell and the frame, FIG. 17 is a cross-sectional view showing the foam filled on the side where the electrode terminal of the power storage cell does not exist, and FIG. FIG. 19 is an explanatory view showing an example in which a fluid passage is provided in a foam, FIG. 20 is an explanatory view showing the arrangement of connectors in units of modules, and FIG. FIG. 22 is an explanatory view showing an installation example of a power storage package on a vehicle.

  In FIG. 1, reference numeral 1 denotes a power storage cell. A plurality of power storage cells 1 are connected to form a module, and a plurality of power storage modules are assembled to construct a power storage package. EV) or a hybrid vehicle (HEV) or the like. The power storage cell 1 is a flat power storage body having a substantially flat rectangular shape, such as a lithium ion secondary battery or an electric double layer capacitor. As represented by a planar laminate type lithium ion secondary battery, an internal electrode and an electrolyte The laminated body of the layers is hermetically sealed with a sheet-like laminate film in which the surface of an aluminum-based metal layer is insulation-coated with a resin layer, for example.

  The configuration of the power storage cell 1 includes a power storage unit 2 that is formed in a rectangular shape that is slightly thicker than the surroundings by enclosing a power storage element composed of a laminate of an electrolyte layer and an electrode, and a sheet-like shape around the power storage unit 2 And two metal positive and negative electrode terminals 4 and 5 exposed from both ends of the sealing portion 3 are provided.

  Further, the power storage cell 1 has a substantially prismatic elongated shape at the base portion which is a boundary portion between the sealing portion 3 and the electrode terminals 4 and 5 as a basic holding structure for modularization (packaging). The adapter 10 is attached. FIG. 1 shows an example in which two power storage cells 1 each having an adapter 10 attached to the bases of the electrode terminals 4 and 5 are connected in series. The adapter 10 prevents the stress from being applied by fixing the base portions of the electrode terminals 4 and 5.

  That is, since the electricity storage cell 1 has a higher rigidity of the sealing portion 3 than the electrode terminals 4 and 5, as shown in FIG. 2A, when the adapter 10 is not attached to the electricity storage cell 1, When the stress easily concentrates on the base portions of the terminals 4 and 5 (portions surrounded by circles in the figure) and the base portions of the electrode terminals 4 and 5 are bent by an external force, the sealing portion 3 is pulled and the power storage portion There is a possibility that the sealing ability with respect to 2 is impaired.

  Therefore, as shown in FIG. 2 (b), by fixing the base portions of the electrode terminals 4 and 5 by the adapter 10, the stress applied to the base portions of the electrode terminals 4 and 5 is inherently applied to the electrode terminals 4 and 5 and It can be moved to the boundary with the adapter 10 to protect the boundary portion of the sealing portion 3 and ensure the sealing ability. As a result, the power storage cell 1 can be easily handled, and can be flexibly applied to various package structures (module structures) using the power storage cell 1 with the adapter 10 attached as a basic configuration.

  Here, the adapter 10 shown in FIG. 1 has an upper and lower divided structure of an upper adapter 11 and a lower adapter 12, and the upper adapter 11 and the lower adapter are interposed via pin-shaped bosses 12 a erected on the lower adapter 12. By fitting and fixing the adapter 12, the base portions of the electrode terminals 4 and 5 are clamped. Thereby, the upper adapter 11 and the lower adapter 12 can be integrated and made rigid, and the strong bending prevention effect with respect to the electrode terminals 4 and 5 can be expected.

  The upper adapter 11 and the lower adapter 12 may be fixed by fitting through a boss 12a, claw fitting, press fitting, fastening by a screw or rivet, resin welding, or the like. In any case, it is desirable to provide an adhesive tape, an adhesive, or the like between the adapter 10 and the power storage cell 1 to improve the adhesion between the adapter 10 and the power storage cell 1.

  The adapter 10 can be formed of a material excellent in electrical insulation, for example, a resin such as rubber or bakelite, and can improve safety by adding an insulating cover function of the electrode. In this case, it is also possible to form a connector structure inside the adapter 10. For example, as shown in FIGS. 3 and 4, a connector contact 13 is incorporated in the lower adapter 12 and a wiring 14 is connected to the connector contact 13. Then, the cell voltage can be sensed by pulling it out and used for voltage control and the like. Further, a temperature sensor such as a thermocouple or a thermistor can be incorporated in the adapter 10, and the cell temperature can be indirectly detected by measuring the temperature of the electrode terminals 4 and 5.

  On the other hand, the adapter 10 can be made of a metal material such as copper, iron, stainless steel, aluminum, titanium, magnesium, or other alloys. When adapter 10 is formed of a metal material, heat from the electrode can be absorbed and released to the outside, and the output characteristics of power storage cell 1 can be stabilized. Furthermore, the adapter 10 may be formed of a magnetic material, for example, ferrite, iron, nickel, cobalt, or an alloy containing these, and absorbs electromagnetic noise emitted from the electrode and causes noise from the outside to the electrode. Can be prevented from entering.

  Further, the adapter 10 is not limited to the vertically divided structure, and various modifications can be made. For example, as shown in FIG. 5, an adapter 10A having an integrally formed structure may be used. The adapter 10A is provided with a slit having a predetermined depth into which the sealing portion 3 of the battery cell 1 can be inserted on one side surface of the substantially prismatic long side, and the electrode terminals 4 and 5 extending from the slit to the opposite side surface. Is provided, and the base portion of the electrode terminals 4 and 5 can be covered by inserting from the tip side of each electrode terminal 4 and 5 of the battery cell 1. The adapter 10A having an integrally formed structure has fewer parts than the adapter 10 having a vertically divided structure, and can be expected to reduce productivity and cost.

  In this case, depending on variations in the thickness of the sealing portion 3 of the battery cell 1 and the thickness of the electrode terminals 4, 5, a gap between the adapter 10 </ b> A is increased, and the sealing portion 3 and the electrode terminals 4, 4 are increased. It is desirable to use an adhesive or the like together because there is a concern that the adhesion between the adapter 5 and the adapter 10A may be reduced.

  When a plurality of power storage cells 1 are connected and stacked, as shown in FIG. 6, a spacer 15 composed of two plate-like members 15a and 15b is mounted between adjacent adapters 10. Anyway. The spacer 15 sandwiches the electrode portions of the power storage cell 1 connected to each other vertically by two plate-like members 15a and 15b. As shown in FIG. 7, the width a of the adapter 10 and the spacer 15 are By changing the ratio of the distance between the adapters 10 to be arranged b, the rigidity at the position to be bent is lowered by creating a difference in rigidity. As a result, when the battery cells 1 are arranged in a twisted manner and stacked, the electrode portion can be bent at a desired position, and the productivity of the package (module) can be improved.

  Next, a power storage module and a package based on the holding structure of the power storage cell 1 will be described. In the following, for the sake of convenience, description will be made based on the holding structure by the adapter 10, but as described above, the adapter 10 can be variously modified.

  In order to modularize a plurality of power storage cells 1, as shown in FIG. 8, the individual power storage cells 1 fitted with the adapters 10 are combined by a fitting structure via pins 20 arranged at four corners. Are housed in two substantially rectangular frame bodies 21. Each frame 21 is provided with a substantially rectangular bottomed portion 23 for storing the power storage unit 2 of the power storage cell 1, and a groove shape for storing and holding the adapter 10 on both sides of each bottomed portion 23. The groove portion 24 is provided.

  As shown in FIG. 9, the depth of the bottomed portion 23 and the depth of the groove portion 24 of each frame 21 are stored in the space formed by the two bottomed portions 23 in the power storage unit 2 of the power storage cell 1. When the adapter 10 is housed in the space formed by the two groove portions 24 and the frame body 21 is fitted via the pins 20, the adapter 10 is pressed and sandwiched by the frame body 21. 2 is set to float with respect to each frame body 21 with a slight gap.

  That is, the frame body 21 is configured to indirectly hold the power storage cell 1 via the adapter 10 without directly holding the power storage cell 1. Thereby, not only can the alignment of the power storage cell 1 to the frame body 21 be facilitated and the assembly workability can be improved, but also when an external force is applied to the frame body 21, the power storage cell 1 No stress is directly applied to the battery cell, and the battery cell 1 can be effectively protected.

  As shown in FIG. 10, the floating structure of the battery cell 1 is applied to a power storage module 25 configured by laminating a frame body 21 and a frame body 21A in which a bottomed portion 23 and a groove portion 24 are formed on both surfaces. Is done. Since the power storage module 25 has a height dimension S that is not affected by the thickness of each power storage cell 1, a stable dimension can be obtained and inconvenience in installation can be avoided.

  In this case, as shown in FIG. 11, the adapter 10 can be used as a fitting boss without using the pin 20 for coupling the frames constituting the module. Thereby, compared with the conventional frame 105, the frame 21 (21A) can be shortened by L dimension in each direction of the electrode terminals 4 and 5 of the electrical storage cell 1, and the module can be downsized and mounted. Can be improved.

  Further, by forming the adapter 10 with an elastic body, as shown in FIG. 12, when an external force is applied to the power storage module 25, the adapter 10 made of an elastic body can be deformed to absorb the external force. Thereby, the weight of the frame can be reduced.

  Furthermore, as shown in FIGS. 13 to 15, the assembling workability of the module can be improved by slightly changing the shape of the adapter 10. FIG. 13 shows an adapter 10B in which the adapter 10 is slightly changed, and the edge of the corner ridge line portion where the electrode terminals 4 and 5 are extended is filleted to form a desired rounding R (may be chamfered). Corresponding to this adapter 10B, as shown in FIG. 14, the combination of the frame body 21 and the frame body 21A constituting the power storage module 25 moves one of the groove walls by moving the position of the groove portion 24 to the end portion. It changes to the combination of the open frame 21B and the frame 21C.

  Thereby, it becomes easy to bend the electrode terminal of each electrical storage cell 1 which comprises a module in a desired shape, and it becomes possible to perform the connection operation | work of the electrode between several electrical storage cell 1 quickly and correctly. .

  FIG. 15 shows an adapter 10 </ b> C in which the edge of the corner ridge line portion in the prismatic shape of the adapter 10 is processed and chamfered (or rounded R may be used). Corresponding to this adapter 10C, the frame body 21 (21A) side is a frame body 21D in which the side wall of the groove portion 24 is tapered (or the side wall inlet is R-shaped) in accordance with the adapter 10C. Thereby, even if the position of the adapter 10C is slightly deviated from the groove 24, the adapter 10C is guided into the groove by chamfering or R, and the fitting property between the adapter and the frame can be improved.

  Further, the entire surface from the electrode terminals 4 and 5 side shown in FIG. 16 to the side where the electrode terminals of the sealing portion 3 shown in FIG. 17 do not exist between the power storage cell 1 and the frame body 21 (21A to 21D). It is desirable to distribute the foam 26 containing a large number of air bubbles. By using the foam body 26, the power storage cell 1 whose outer shape tends to be distorted can be held in a wide area, and a module with high vibration resistance can be formed.

  In addition, since the foam 26 has an overwhelmingly low specific gravity compared to a normal liquid filler, it is possible to improve vibration resistance while suppressing an increase in the weight of the module. In addition, since the foam 26 has lower rigidity than a normal filler, it can absorb the displacement when the power storage cell or the frame is thermally expanded, and when an external stress is applied to the module. However, the cell can be protected by the deformation of the foam 26.

  In general, the power storage cell has a performance that is temporarily deteriorated at a low temperature (for example, 0 ° C. or less) and may be permanently deteriorated at a high temperature (for example, 50 ° C. or more). Since the foam 26 contains many air bubbles, it becomes a high-quality heat insulating material, can have a heat insulating effect on the power storage cell 1, and is effective in a low temperature environment or an environment near a heating element.

  As the foam 26, a foamed urethane resin, a foamed epoxy resin, a foamed rubber, or the like can be used. In the case of using a foamed urethane resin or a foamed epoxy resin, a mold for molding is unnecessary, and filling is possible after the module is assembled. When the resin is filled, since the resin hardens while spreading, a large area can be maintained uniformly. In addition, when foamed rubber is used, improvement in vibration resistance can be expected due to the large elasticity of the foamed rubber.

  Further, by filling the foam 26, as shown in FIG. 18, the side surface orthogonal to the electrode direction is bent into a round or acute angle with respect to the sealing part 3 around the power storage part 2 of the power storage cell 1. And can be fixed. As a result, it is possible to reduce the size by reducing the dimension in the width direction of the frame (direction perpendicular to the extending direction of the electrode) by the dimension m, and the foam body 26 and the sealing portion 3 are three-dimensional. Thus, the fixing strength of the entire battery cell 1 can be improved.

  In addition, when filling the foam body 26, it is desirable to provide a portion where the foam body 26 is not disposed in a part of the sealing portion 3 of the battery cell 1. That is, by not providing the foam 26 in a part of the sealing part 3, a part of the sealing part 3 is relatively weakened, and this weak part is expanded when gas is generated inside the cell. It can function as a vent valve.

  Further, as shown in FIG. 19, a portion where the foam body 26 is not disposed is provided for the power storage cell 1 (particularly, the power storage portion 2), and this portion is used as a fluid passage 27 through which a fluid such as air or water flows. Thus, temperature control may be performed. Thereby, the heat insulation effect (heat retention effect) of the cell can be obtained at a low temperature, while cooling with a fluid can be performed at a high temperature, and the characteristics of the battery cell 1 can be stabilized.

  The power storage module 25 described above achieves both safety and productivity by setting a voltage unit that does not cause an electric shock to humans or has a low risk even if an electric shock is caused to be one module. For example, assuming that the number of connections in series connection of the power storage cells 1 is a maximum voltage of 50 V or less, one module is provided, and output connectors are provided at both ends for each module. For example, as shown in FIG. 20, the output connector is a male connector 28 that protrudes from the end of the frame body 21 and a female connector 29 that is embedded in the end of the frame body 21.

  Then, as shown in FIG. 21, by connecting two or more power storage module 25 provided with connectors 28 and 29 and holding them with an outer case 30 to form a power storage package 35, a safe operation can be performed. A package having a desired voltage and capacity can be obtained. When this power storage package 35 is installed in a vehicle, as shown in FIG. 22, an in-vehicle package that is light and has high vibration resistance can be realized by interposing an elastic body 51 with the vehicle body 50. .

  As described above, in the present embodiment, by fixing the boundary portion between the sealing portion 3 of the battery cell 1 and the electrode terminals 4 and 5 with the adapter 10 (10A to 10C), the electrode terminal is caused by stress concentration. It is possible to prevent degradation of the sealing performance due to the breakage of 4 and 5 and the opening of the sealing portion 3, and it is possible to improve the productivity in packaging (modularizing) by making the cell easy to handle. Moreover, by applying the basic holding structure of the battery cell with this adapter, it is possible to reduce the size and weight and improve the vibration resistance, and to add functions such as voltage control and temperature control, such as a vehicle, etc. It is possible to construct a power storage package (power storage module) suitable for mounting on a battery.

Perspective view of power storage cells connected in series Explanatory drawing which shows the state of the electrode terminal of an electrical storage body cell Illustration of the adapter used as a connector Enlarged view showing connector contacts Explanatory drawing showing an integrated adapter Explanatory drawing which shows the example which interposed the spacer between adjacent adapters Explanatory drawing which shows the space | interval of an adapter and a spacer, and the bending position of an electrode Explanatory drawing which shows accommodation to the frame of an electrical storage body cell Sectional drawing of the state where the battery cell is stored in the frame Explanatory drawing of the electrical storage unit module which laminated | stacked the electrical storage unit cell and the frame. Explanatory drawing showing miniaturization of the frame Explanatory drawing which shows the influence of external force with respect to an electrical storage module Explanatory drawing which shows the modification of the adapter with which an electrical storage body cell is mounted | worn Explanatory drawing which shows the electrical storage unit module using the frame corresponding to the adapter of FIG. Explanatory drawing which shows the modification which improved the fitting property of an adapter and a frame. Sectional drawing which shows the example with which the foam was filled between the electrical storage body cell and the frame Sectional drawing which shows the foam with which the electrode terminal of an electrical storage body cell was filled into the side which does not exist Explanatory drawing which shows the three-dimensional fixed state of a sealing part and a foam Explanatory drawing which shows the example which provided the fluid passage in the foam Explanatory drawing showing the arrangement of connectors in module units Explanatory drawing which shows an electrical storage package Explanatory drawing which shows the example of installation to the vehicle of a power storage unit package Perspective view of power storage cells connected in series according to a conventional example Explanatory drawing which shows accommodation to the frame of an electrical storage body cell same as the above Same as above, a cross-sectional view of a state where the battery cell is housed in a frame As above, an explanatory diagram of a power storage module in which a power storage cell and a frame are stacked. As above, an explanatory diagram showing the influence of external force on the power storage module

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power storage cell 2 Power storage part 3 Sealing part 4, 5 Electrode terminal 10, 10A, 10B, 10C Adapter 13 Connector contact 15 Spacer 21, 21A, 21B, 21C, 21D Frame 25 Power storage module 26 Foam 27 Fluid passage 28, 29 Connector 30 Outer case 35 Power storage package 50 Car body 51 Elastic body
Agent Patent Attorney Susumu Ito

Claims (17)

A planar power storage unit projecting outside an electrode terminal connected to the power storage unit from a sealing unit that seals the power storage unit,
An electricity storage unit, wherein an adapter for fixing the boundary portion is interposed at a boundary portion between the sealing portion and the electrode terminal exposed from the sealing portion.   The power storage unit according to claim 1, wherein the adapter includes two members that sandwich and fix the boundary portion.   The adapter is formed of a single member, and a slit is provided through which the electrode terminal can be inserted and the sealing portion can be inserted to a predetermined position. The electricity storage unit described.   The power storage unit according to claim 1, wherein the adapter is provided with a connector contact that is electrically connected to the electrode terminal.   The power storage unit according to claim 1, wherein a temperature sensor that detects a temperature of the electrode terminal is incorporated in the adapter.   The electrical storage according to any one of claims 1 to 5, wherein a spacer for fixing the electrode terminal is interposed between the adjacent adapters when a plurality of the electrical storage units are connected in series. body. A frame body that houses and holds the electricity storage body according to any one of claims 1 to 6,
A package structure of a power storage unit, wherein the adapter is fixed by the frame body, and the power storage unit is held floating from the frame body.   A first frame body for pressing the frame body from one surface side, and a second frame body for pressing the adapter from the other surface side facing the first frame body. 8. The package structure for a power storage unit according to claim 7, wherein the package structure is configured.   9. The electricity storage according to claim 8, wherein the adapter is fitted to the first frame and the second frame, and the first frame and the second frame are coupled. Body package structure.   The power storage unit package structure according to claim 7, wherein the adapter is formed of an elastic body.   The package structure for a power storage unit according to any one of claims 7 to 10, wherein a foam is filled between the power storage unit and the frame.   The package structure for a power storage unit according to claim 11, wherein a side surface of the sealing portion on the side where the electrode terminal does not exist is bent into a round shape or an acute angle shape and fixed three-dimensionally with the foam.   13. The package structure for a power storage unit according to claim 11, wherein a portion where the foam is not disposed is provided between the power storage unit and the frame.   14. The package structure for a power storage unit according to claim 13, wherein the portion where the foam is not disposed is used as a fluid passage through which a fluid flows.   The package structure for a power storage unit according to claim 13, wherein a portion where the foam is not disposed is provided in a part of the sealing portion.   The power storage module is configured by stacking the power storage unit and the frame housing the adapter, and the number of connections in which the maximum voltage obtained by connecting the power storage units in series is a voltage that can ensure safety against electric shock. The power storage unit package structure according to claim 7, wherein output connectors are provided at both ends of the power storage unit module.   17. The package structure for a power storage unit according to claim 16, wherein a plurality of said power storage unit modules are connected and held by an outer case, and an in-vehicle package is provided in which the outer case is installed on a vehicle body via an elastic body.

Images