KR20130010190A - Terminal plate forming vent unit and electrochemical energy storage device - Google Patents

Abstract

PURPOSE: A terminal plate with a vent part is provided to suppress the generation of a gap between a terminal plate and a storage device while discharging gas generated when a storage device is operated, to outside, and to minimize the deformation of an electrochemical energy storage device. CONSTITUTION: A terminal plate(30) for an electrochemical energy storage device comprises: a terminal plate main body(31) which has a first side and second side, seals the open part of the case, has a terminal plate, and has an elasticity; a vent part(33) which penetrates through the terminal plate main body, forms in the terminal plate body, and can be opened and closed by the elasticity of the terminal plate body according to internal pressure of the case in order to discharge gas outside the case; and a porous protective membrane(39) for protecting the vent part by discharging gas discharged from the vent part and is formed on the one side of the terminal plate body.

Description

Terminal plate having vent part and electrochemical energy storage device having same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrochemical energy storage device, and more particularly, to a terminal plate having a vent portion capable of effectively dispersing and discharging gas generated during external vibration or driving of a power storage element, and an electric device having the same. It relates to a chemical energy storage device.

Electrochemical energy storage devices such as electrolytic capacitors, supercapacitors, electric double layer capacitors (EDLC), and lithium ion capacitors (LIC) can be pouch type, can type, etc. have. The can shape includes a cylindrical shape and a square shape.

In such a can-type electrochemical energy storage device, a storage element for storing electrochemical energy is received in the case through the opening, and the opening of the case is sealed by the terminal plate. The case is provided with a safety vent on the opposite side of the side where the opening is formed, ie on the bottom of the case.

These safety vents function to support the power storage element embedded in the case when the electrochemical energy storage device is normally operated in the form of a thin plate. In addition, the safety vent is deformed when the internal pressure of the case is higher than the pressure to control the internal pressure of the case. That is, as the power storage device is used, gas is generated in the case, and the internal pressure of the case is gradually increased due to the generated gas. When the internal pressure of the case is above a certain pressure, the safety vent is deformed to discharge the gas inside the case to the outside to adjust the internal pressure of the case. At this time, the safety vent is convexly deformed toward the bottom of the case.

This modification of the safety vent does not affect the electrochemical properties of the actual electrochemical energy storage device. However, as the safety vent is convexly deformed toward the bottom side of the case, the power storage element embedded in the case cannot be stably supported.

As a result, when the power storage element is not stably supported, the power storage element easily shakes due to external vibration or the like, so that a play occurs with the terminal plate. When a gap is generated between the terminal plate and the power storage device, the electrochemical characteristics of the power storage device are deteriorated to shorten the life of the electrochemical energy storage device.

In addition, when the safety vent is convexly deformed toward the bottom of the case, physical stress may be applied to the power storage device, which may cause damage to the positive electrode current collector, the negative electrode current collector, or the separator constituting the power storage device. have.

In addition, since the safety vent may be convexly deformed toward the bottom of the case, in the case of an electronic device using the electrochemical energy storage device, the electrochemical energy storage may be considered in consideration of the size change caused by the deformation of the electrochemical energy storage device. Space should be provided for the device. This may cause a problem that the size of the electronic device is larger than necessary.

Accordingly, an object of the present invention is to provide a terminal plate and an electrochemical energy storage device having a vent portion capable of suppressing a gap between the power storage element and the terminal plate while effectively discharging the gas generated during external vibration or driving the power storage element to the outside. have.

It is another object of the present invention to have a terminal plate having a vent portion and a vent portion capable of minimizing the effect of physical stress on the elements constituting the electrochemical energy storage device while effectively discharging the gas generated during external vibration or power storage element driving to the outside. An electrochemical energy storage device is provided.

It is still another object of the present invention to provide a terminal plate having a vent part and an electrochemical energy storage device having the vent portion capable of minimizing deformation of the electrochemical energy storage device while effectively discharging the gas generated during external vibration or power storage element driving to the outside. There is.

Still another object of the present invention is to provide a terminal plate having a vent portion and an electrochemical energy storage device having the same, which can simplify the structure of the electrochemical energy storage device.

It is still another object of the present invention to provide a terminal plate having a vent portion capable of dispersing and discharging gas generated during external vibration or driving of a power storage element, and an electrochemical energy storage device having the same.

In order to achieve the above object, the present invention provides a terminal plate for an electrochemical energy storage device having a terminal plate body, a vent portion and a porous protective membrane. The terminal plate body has a first surface facing the opening of the case, and a second surface opposite to the first surface and exposed to the outside, sealing the opening of the case, and electrically storing the power storage element built in the case with the outside. The terminal portion is connected to the formed and has elasticity. The vent part is formed integrally with the terminal plate body through the terminal plate body, and is closed by elasticity of the terminal plate body when the internal pressure of the case due to the gas generated inside the case is below a certain pressure, and the pressure is greater than the predetermined pressure. If the case is opened by the elasticity of the terminal plate body to discharge the gas out of the case. The porous protective film is formed on the second surface of the terminal plate body and protects the vent part while discharging the gas discharged from the vent part to the outside.

In the terminal plate for an electrochemical energy storage device according to the present invention, the vent part includes a gas induction part and an opening and closing part. The gas guide part has an inner diameter smaller toward the second surface than the first surface, and induces a discharge direction of the gas inside the case. The opening and closing part is connected to an upper end of the gas induction part and is formed to penetrate through the second surface. When the pressure acting in the direction of the second surface from the first surface is less than a predetermined pressure, the opening and closing part is closed by elasticity of the terminal plate body. When the pressure is greater than or equal to a predetermined pressure, the terminal plate body is opened by the elasticity to discharge the gas out of the second surface.

In the terminal plate for an electrochemical energy storage device according to the present invention, the gas induction part has an inlet, an outlet and a guide. The inlet is formed on the first surface and gas is introduced. The outlet is connected to the inlet and formed in the terminal plate body to be connected to the opening and closing portion, and transmits the gas introduced into the inlet to the opening and closing portion. And the guide port is connected to the inlet and the outlet, the inner diameter from the inlet to the outlet is formed in a form that is continuously narrowed, and guides the gas introduced into the inlet to move toward the outlet.

In the terminal plate for an electrochemical energy storage device according to the present invention, the opening and closing portion may be formed to have a predetermined inner diameter. In addition, at least one vent part may be formed on the terminal plate body.

In the terminal plate for an electrochemical energy storage device according to the present invention, a plurality of vent parts may be formed in the terminal plate body, and the inner diameter of the opening and closing part of the vent part may increase as the distance from the center of the terminal plate body increases.

In the terminal plate for an electrochemical energy storage device according to the present invention, the vent portion may be formed to be inclined with respect to the second surface of the terminal plate body.

In the terminal plate for an electrochemical energy storage device according to the present invention, the porous protective membrane may be one of polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, polyvinyl fluoride, and polyvinylidene fluoride. have.

The present invention also provides an electrochemical energy storage device having a power storage element, a case, and a terminal plate. The power storage element stores electrochemical energy. The case has an opening formed on one side, and the power storage element is built in through the opening. The terminal plate includes a terminal plate body, a vent part, and a porous protective film. The terminal plate body has a first surface facing the opening of the case and a second surface opposite to the first surface and exposed to the outside, sealing the opening of the case, and storing the power storage element embedded in the case with the outside. An electrically connected terminal portion is formed and has elasticity. The vent part is formed integrally with the terminal plate body through the terminal plate body. When the internal pressure of the case becomes higher than a predetermined pressure due to the gas generated inside the case, the vent part is opened by the elasticity of the terminal plate body to supply gas. Drain out of the case. The porous protective film is formed on the second surface of the terminal plate body and protects the vent part while discharging the gas discharged from the vent part to the outside.

In the electrochemical energy storage device according to the present invention, the power storage device may be one of an electrolytic capacitor, a super capacitor, an electric double layer capacitor, and a lithium ion capacitor.

According to the present invention, since the vent part is integrally formed on the terminal plate made of rubber material, when the internal pressure of the case becomes higher than the predetermined pressure due to the gas generated inside the case, the vent part can be opened to effectively discharge the gas to the outside. . At this time, since only the vent part is opened and closed by the elasticity of the terminal plate, the gas is discharged to the outside, and since the external structure has the same shape before and after the gas discharge, the occurrence of play between the power storage element and the terminal plate can be suppressed.

Since only the vent part is opened and closed by the elasticity of the terminal plate, the gas is discharged to the outside, and the external structure has the same shape before and after the gas discharge, thereby minimizing the material stress on the elements constituting the electrochemical energy storage device. Therefore, the deformation of the electrochemical energy storage device can be minimized.

Since the porous protective film is formed on the upper portion of the terminal plate body, the terminal plate body portion in which the vent portion is formed can be protected from external force while discharging the gas discharged from the vent portion to the outside. That is, since the terminal plate body is made of a rubber material having elasticity, it is possible to suppress the malfunction, deformation or damage of the vent part due to external force by forming a porous protective film on the vent part.

In the electrochemical energy storage device according to the present invention, since the vent part is integrally formed in the terminal plate, the structure of the electrochemical energy storage device can be simplified as compared with installing the safety vent separately, thereby simplifying the manufacturing process. There is also an advantage.

In addition, by forming a plurality of vents on the terminal plate body and forming a porous protective film on the terminal plate body on which the gas is discharged, a pressure dispersion effect of discharging gas through the plurality of vents and the porous protective film can be expected to be discharged to the outside. Can be.

1 is a view showing an electrochemical energy storage device having a terminal plate in which a vent part is formed according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of portion “A” of FIG. 1.
3 is a plan view illustrating the terminal plate of FIG. 1.
4 is a plan view illustrating a terminal plate on which a vent part is formed according to a second exemplary embodiment of the present invention.
5 is a cross-sectional view taken along line 5-5 of FIG. 4.
6 is a cross-sectional view illustrating a terminal plate in which a vent part is formed according to a third exemplary embodiment of the present invention.

In the following description, only parts necessary for understanding the operation according to the embodiment of the present invention will be described, it should be noted that the description of other parts will be omitted so as not to distract from the gist of the present invention.

Also, the terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary meanings, and the inventor is not limited to the concept of terms in order to describe his invention in the best way. It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be properly defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely one preferred embodiment of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment

1 is a view showing an electrochemical energy storage device having a terminal plate in which a vent part is formed according to a first embodiment of the present invention. FIG. 2 is an enlarged view of portion “A” of FIG. 1. 3 is a plan view illustrating the terminal plate of FIG. 1.

1 to 3, an electrochemical energy storage device 100 according to a first embodiment of the present invention includes a power storage element 10, a case 20, and a terminal plate 30, and a terminal plate 30. The terminal portion 40 is provided. The electrical storage element 10 stores electrochemical energy. The case 20 has an opening formed on one side thereof, and the power storage element 10 is built in through the opening. In addition, the terminal plate 30 includes a terminal plate body 31, a vent part 33, and a porous protective film 39. The terminal plate body 31 seals the opening of the case 20, electrically connects the power storage element 10 to the outside, and has elasticity. The vent part 33 is formed integrally with the terminal plate body 31 by penetrating through the terminal plate body 31, and the terminal plate body when the internal pressure of the case 20 due to the gas generated inside the case 20 is lower than a predetermined pressure. It closes by the elasticity of 31, and when it is more than a predetermined pressure, it opens by the elasticity of the terminal plate body 31, and discharges gas out of the case 20. FIG. The porous protective film 39 is formed on the second surface 31b of the terminal plate body 31 to protect the vent part 33 while discharging the gas discharged from the vent part 33 to the outside.

The electrochemical energy storage device 100 according to the first embodiment will be described in detail as follows.

The electrical storage device 10 stores electrochemical energy, and converts electrical energy into chemical energy or chemical energy into electrical energy. The power storage device 10 may be applied without limitation as long as the device can store electrochemical energy for use as power in an automobile or the like. The power storage element 10 has an electrolytic capacitor having a capacitance of several tens to several hundred uF (microfarad), a super capacitor having a capacitance of several parats, an electric double layer capacitor having a capacitance of 100F or more, lithium Ion capacitors and the like.

The power storage device 10 may have a cylindrical shape or may have a prismatic shape such as a quadrangular pillar, a pentagonal pillar, and a hexagonal pillar. In addition, the hole 11 formed in the vertical direction in the center of the power storage element 10 is a core space and is a space required for manufacturing the power storage element 10. Although not shown, the power storage element 10 includes a positive electrode portion having a positive electrode current collector, a negative electrode portion having a negative electrode current collector, a separator, and an electrolyte.

The case 20 houses the power storage element 10 inserted through the opening. Since not only the power storage element 10 but also the gas generated from the power storage element 10 exist inside the case 20, aluminum or an aluminum alloy is light as a material of the case 20 and has little influence of corrosion due to gas. This can be used. The shape of the case 20 generally consists of a shape corresponding to the shape of the power storage element 10. For example, when the power storage element 10 is cylindrical, the case 20 is also cylindrical, and when the power storage element 10 is a prismatic shape such as a quadrangular pillar, the case 20 may also be a square shape. Alternatively, the power storage element 10 may have a cylindrical shape, and the case 20 may have a square shape, or the case 20 may have a square shape and the power storage element 10 may have a cylindrical shape.

The terminal plate 30 is installed to seal the open portion of the upper end of the case 20, and blocks the inside and the outside of the power storage element 10. An elastic rubber material may be used as the terminal plate 30. For example, an olefinic synthetic rubber such as ethylene propylene copolymer (EPT), ethylene propylene diene copolymer (EPDM), silicone rubber, fluorine rubber, or the like may be used. At this time, the upper end of the case 20 close to the opening is deformed inward, and the terminal plate 30 is mounted on the end of the case 20 in a state where the terminal plate 30 is mounted on a portion provided by the deformation of the case 20. By bending to the outer side of the contact with the terminal plate 30, the inside of the case 20 in which the power storage device 100 is embedded is sealed.

In addition, the terminal unit 40 has a terminal plate 30 fixedly installed therein, and electrically connects the power storage element 10 and the external load terminal inside the case 20. The terminal portion 40 includes terminals 41 extending from the power storage element 10 and protruding above the terminal plate 30, and lead wires 43 connected to the terminals 41, respectively. ) Is electrically connected to the external load end.

In particular, the terminal plate 30 includes a terminal plate body 31, a vent part 33, and a porous protective film 39 as described above. The terminal plate body 30 has a first surface 31a facing the opening of the case 20 and a second surface 31b opposite to the first surface 31a and exposed to the outside. The terminal plate body 31 seals the opening of the case 20, electrically connects the power storage element 10 embedded in the case 20 to the outside, and has elasticity. The vent part 33 is formed integrally with the terminal plate body 31 by penetrating through the terminal plate body 31 and is opened when the internal pressure of the case 20 becomes higher than a predetermined pressure due to the gas generated in the case 20. The gas is discharged out of the case 20. The porous protective film 39 is formed on the second surface 31b and protects the vent part 33 from an external force or an external environment while discharging the gas discharged from the vent part 33 to the outside.

 In this case, the terminal plate body 31 may have a shape of a disc, a square plate, a pentagonal plate, a hexagonal plate, etc. to correspond to the shape of the case 20. 3 shows a terminal plate body 31 in the form of a disc. The terminal plate body 31 may be manufactured in a form in which the first surface 31a and the second surface 31b are substantially parallel.

The vent part 33 may be formed in a direction that vertically penetrates the first surface 31a and the second surface 31b. The vent part 33 includes a gas guide part 35 and an opening / closing part 37. The gas guide part 35 has an inner diameter smaller toward the second face 31b than the first face 31a, and induces a gas discharge direction inside the case 20. The opening and closing part 37 is connected to the upper end of the gas induction part 35 and is formed to penetrate through the second surface 31b. In this case, the gas induction part 35 is always kept open regardless of the pressure acting on the terminal plate body 31. On the other hand, the opening and closing portion 37 is closed by the elasticity of the terminal plate body 31 when the pressure acting in the direction from the first surface 31a to the second surface 31b is lower than or equal to the predetermined pressure, and the terminal plate body 31 when the pressure is greater than or equal to the predetermined pressure. It opens by elasticity and the gas is discharged out of the 2nd surface 31b.

In this case, the gas guide part 35 includes an inlet 32, an outlet 34, and a guide 36. The inlet 32 is formed on the first surface 31a and gas is introduced therein. The outlet 34 is connected to the inlet 32 and the guide 36 through the medium formed in the terminal plate body 31 to be connected to the opening and closing portion 37, the opening and closing portion 37 to the gas introduced into the inlet 32 To pass). And guide port 36 is connected to the inlet 32 and the outlet 34, the inner diameter of the inlet 32 toward the outlet 34 is formed in a continuous narrow shape, the gas introduced into the inlet (32) Guide to move towards outlet 34. For example, the gas guide part 35 may be formed in a conical shape or may be formed in a step shape.

The opening and closing part 37 may be formed to be the same as or narrower than the outlet 34 of the gas induction part 35. In this embodiment, the opening and closing part 37 has been described an example formed to have a predetermined inner diameter. The opening and closing part 37 may be formed in a direction penetrating perpendicular to the second surface 31b. The inner diameter of the opening and closing part 37 may be determined in consideration of the elasticity of the terminal plate body 31, the position of the vent part 33 formed on the terminal plate body 31, and the internal pressure of the case 20.

At least one vent part 33 may be formed in the terminal plate body 31. In the first embodiment, an example in which one vent is formed in the central portion of the terminal plate body 31 is disclosed, but is not limited thereto. The vent part 33 may be formed at a position spaced apart from the point where the terminal part 40 is formed.

The porous protective film 39 is formed by bonding on the second surface 31b of the terminal plate body 31. Since the porous protective film 39 is formed on the second surface 31b of the terminal plate body 31, the terminal plate body 31 in which the vent part 33 is formed while discharging the gas discharged from the vent part 33 to the outside is provided. The part can be protected from external forces. That is, since the terminal plate body 31 is made of a rubber material having elasticity, damage, deformation or malfunction of the vent part 33 due to external force can be suppressed by forming the porous protective film 39 on the vent part 33. . In addition, when the gas is discharged only through the vent part 33 without the porous protective film 39, the gas is concentrated at the point where the vent part 33 is opened, but the vent part 33 is used when the porous protective film 39 is used. Gas may be dispersed and discharged through the vicinity of the porous protective membrane 39. In this case, the material of the porous protective film 39 may be a fluorine resin such as polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, polyvinyl fluoride, polyvinylidene fluoride, or the like, but is not limited thereto.

Accordingly, when the pressure inside the case 20 of the electrochemical energy storage device 100 according to the first embodiment is greater than or equal to a predetermined pressure, the vent part 33 is provided in the electrochemical energy storage device 100 so that the gas is automatically discharged. Is designed, for example, when the vent part 33 which is operated at an internal pressure (or critical pressure) of about 40 kg / cm ² is formed in the terminal plate body 31 so that the internal pressure of the case 20 becomes larger than the critical pressure, the vent The part 33 is opened, and the gas inside the case 20 is discharged to the outside, and the internal pressure of the case 20 is adjusted below the grain boundary pressure.

In this way, since the vent part 33 is integrally formed on the terminal plate 30 and the internal pressure of the case 20 can be adjusted according to the opening / closing operation of the opening / closing part 37 of the vent part 33, the case 20 is provided. The gas generated inside can be discharged to the outside effectively. In addition, the opening and closing part 37 of the vent part 33 is operated by using the elasticity of the terminal plate 30, but the external structure of the electrochemical energy storage device 100 including the terminal plate 30 is substantially the same before and after gas discharge. Since it has a form, generation | occurrence | production of the clearance between the electrical storage element 10 and the terminal board 30 can be suppressed.

In addition, since only the vent part 33 is opened and closed by the elasticity of the terminal plate 30, the gas is discharged to the outside, and since the external structure has substantially the same shape before and after gas discharge, the electrochemical energy storage device 100 is configured. Material stress can be minimized to the element, and the deformation of the electrochemical energy storage device 100 can be minimized.

In addition, since the vent part 33 is integrally formed on the terminal plate 30, the structure of the electrochemical energy storage device 100 can be simplified as compared with installing a safety vent separately as in the prior art, and thus, a manufacturing process. Can be simplified.

In addition, the terminal plate 30 can easily adjust the threshold pressure which is an opening and closing condition of the vent part 33 by adjusting the size of the vent part 33 formed in the terminal plate body 31.

Second Embodiment

Meanwhile, in the first embodiment, an example in which one vent part 33 is formed in the central portion of the terminal plate body 31 is disclosed, but is not limited thereto. For example, as illustrated in FIGS. 4 and 5, a plurality of vent parts 133 may be formed in the terminal plate body 131.

4 is a plan view illustrating a terminal plate 130 on which a vent part 133 is formed, according to a second embodiment of the present invention. 5 is a cross-sectional view taken along line 5-5 of FIG. 4.

In the terminal plate 130 according to the second embodiment of the present invention, a plurality of vent parts 133 are formed in the terminal plate body 131, and a porous protective film 139 is formed on the second surface 131b of the terminal plate body 131. Has a formed structure.

The plurality of vent parts 133 may include a first vent part 133a formed at a central portion of the terminal plate body 131 and a plurality of second vent parts 133b formed around the first vent part 133a. In this case, the plurality of second vent parts 133b may be positioned on the circumference of the virtually drawn circle around the first vent part 133a and may be formed at the same angle between the plurality of second vent parts 133b. Since three second vent parts 133b are formed in the terminal plate body 131 in this embodiment, the angle between the three second vent parts 133b may be 120 degrees.

Alternatively, the plurality of vent parts 133 may be uniformly formed in the terminal plate body 131.

In this case, the first and second vent parts 133a and 133b may be formed in the same shape, or the first vent part 133a may be formed relatively smaller than the second vent part 133b. For example, the inner diameter w2 of the opening and closing portions 137b of the plurality of second vent portions 133b may be formed to be relatively larger than the inner diameter w1 of the opening and closing portions 137a of the first vent portions 133a. That is, the inner diameter of the opening and closing portion 137 of the vent part 133 may increase as the distance from the center of the terminal plate body 131 increases. The reason for forming this is because the elasticity in the terminal plate body 131 increases from the outside of the terminal plate body 131 toward the center, so that the plurality of vent parts 133 can be opened at the same or similar pressure at a predetermined pressure. to be. That is, the inner diameter of the opening / closing portion 137a of the first vent part 133a formed in the central portion of the terminal plate body 131 having a relatively large elastic force is small and is separated from the central portion of the terminal plate body 131. The inner diameter of the opening and closing part 137b of the vent part 133b may be larger than the inner diameter of the opening and closing part 137a of the first vent part 133a.

By forming the plurality of vent parts 133 on the terminal plate 130 as described above, a pressure dispersion effect capable of dispersing gas through the plurality of vent parts 133 can be expected.

Third Embodiment

Meanwhile, the vent parts 33 and 133 formed in the terminal plates 30 and 130 according to the first and second embodiments are perpendicular to the first surfaces 31a and 131a and the second surfaces 31b and 131b of the terminal plate bodies 31 and 131. Although the example which formed was disclosed, it is not limited to this. For example, as shown in FIG. 6, at least one of the vent parts 233 may be inclined with respect to the second surface 231b of the terminal plate body 231.

6 is a cross-sectional view illustrating a terminal plate 230 in which a vent part 233 is formed according to a third embodiment of the present invention.

Referring to FIG. 6, in the terminal plate 230 according to the third embodiment, the plurality of vent parts 233 may include a first vent part 233a formed at a center portion of the terminal plate body 231, and a circumference of the first vent part. And a second vent part 233b and a third vent part 233c formed therein, and a porous protective film 239 is formed on the second surface 231b of the terminal plate body 231.

In this case, the first vent part 233a is formed in a direction perpendicular to the first and second surfaces 231a and 231b. The opening and closing part 237b of the second vent part 233b is formed to be inclined at the second surface 231b. The opening and closing part 237b of the second vent part 233b is formed to be inclined outwardly, for example, counterclockwise, with respect to the opening and closing part 237a of the first vent part 233a. The opening and closing part 237c of the third vent part 233c is formed to be inclined outwardly, for example, in a clockwise direction, with respect to the opening and closing part 237a of the first vent part 233a.

Meanwhile, in the third embodiment, although the second and third vent parts 233b and 233c are formed to be inclined outward with respect to the first vent part 233a, the opening and closing part 237a of the first vent part 233a is opposite. It may be formed to be inclined inward with respect to.

Alternatively, if the gas outlet is formed in the electronic device equipped with the electrochemical energy storage device, the opening and closing portion 237 of the plurality of vents 233 toward the gas outlet side so that the gas discharge through the gas outlet can be made smoothly. It can be formed to.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. In addition to the embodiments disclosed herein, it is apparent to those skilled in the art that other modifications based on the technical idea of the present invention may be implemented.

10: power storage element
20: case
30: terminal plate
31: terminal plate body
31a: first side
31b: second side
33: vent section
35 gas induction part
37: opening and closing part
39: porous protective film
40: terminal part
41: terminal
43: lead wire
100: electrochemical energy storage device

Claims (10)

A terminal portion having a first surface facing the opening of the case and a second surface opposite to the first surface and exposed to the outside, sealing the opening of the case and electrically connecting the power storage element built in the case to the outside; Is formed and the terminal plate body having an elastic;
Is formed integrally with the terminal plate body through the terminal plate body, when the internal pressure of the case due to the gas generated inside the case is below a certain pressure is closed by the elasticity of the terminal plate body, if the terminal pressure is more than the terminal plate A vent part which is opened by the elasticity of the body and discharges gas out of the case;
A porous protective film formed on a first surface of the terminal plate body and protecting the vent part while discharging the gas discharged from the vent part to the outside;
Terminal plate for the electrochemical energy storage device formed with a vent portion comprising a. The method of claim 1, wherein the vent unit,
An inner diameter of the gas inducing portion which is smaller toward the second surface than the first surface and induces a discharge direction of the gas inside the case;
Is connected to the upper end of the gas induction part is formed through the second surface, when the pressure acting in the direction of the second surface from the first surface is below a predetermined pressure is closed by the elasticity of the terminal plate body, the predetermined pressure or more An opening / closing part opened by elasticity of the terminal plate body to discharge gas out of the second surface;
Terminal plate for the electrochemical energy storage device formed with a vent portion comprising a. The gas induction part of claim 2,
An inlet formed on the first surface and into which gas is introduced;
An outlet configured to be connected to the inlet and formed in the terminal plate body to be connected to the opening and closing portion, and to deliver gas introduced into the inlet to the opening and closing portion;
A guide port connecting the inlet to the outlet, the inner diameter of the inlet being continuously narrowed from the inlet to the outlet, and guiding the gas flowing into the inlet toward the outlet;
Terminal plate for the electrochemical energy storage device formed with a vent portion comprising a. The method of claim 2,
The opening and closing terminal plate for the electrochemical energy storage device is formed with a vent portion, characterized in that formed to have a predetermined inner diameter. The method of claim 1,
The terminal plate body terminal plate for the electrochemical energy storage device having a vent portion, characterized in that at least one vent portion is formed. The method of claim 1,
A plurality of vent parts are formed in the terminal plate body, and the inner diameter of the vent part opening and closing part increases as the distance from the center of the terminal plate body increases. The method of claim 1,
And the vent part is inclined with respect to the second surface of the terminal plate body. The method of claim 1,
The porous protective membrane material is a polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, polyvinyl fluoride, polyvinylidene fluoride for the electrochemical energy storage device formed with a vent portion, characterized in that Terminal block. A storage device for storing electrochemical energy;
A case having an opening formed at one side thereof and having the power storage element built therein;
A first surface facing the opening of the case and a second surface opposite to the first surface and exposed to the outside, the opening of the case is sealed, and an electrical storage element built in the case is electrically connected to the outside; A terminal plate body having a terminal portion and having elasticity,
Is formed integrally with the terminal plate body through the terminal plate body, when the internal pressure of the case is higher than a predetermined pressure due to the gas generated inside the case is opened by the elasticity of the case body to discharge the gas out of the case Vent section,
A terminal plate formed on a first surface of the terminal plate body and having a porous protective film protecting the vent part while discharging the gas discharged from the vent part to the outside;
Electrochemical energy storage device having a terminal plate formed with a vent portion comprising a. The power storage device of claim 9, wherein
The power storage device is an electrochemical energy storage device having a terminal plate with a vent portion, characterized in that one of an electrolytic capacitor, a super capacitor, an electric double layer capacitor, a lithium ion capacitor.

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