[1]Mutual citations and related applications
[2]
This application claims the benefit of priority based on the date of Korea Patent Application No. 10-2016-0096316 28 years 07 January 2016, and all information disclosed in the literature of the Korea patent application are included as part of the specification.
[3]
Art
[4]
The present invention relates to a secondary battery.
BACKGROUND
[5]
This secondary battery has been developed, unlike primary cells, rechargeable, and due also to the small size and large capacity much potential research in recent years. The demand for secondary batteries as an energy source has increased dramatically as the development of technology and demand for mobile devices increases.
[6]
Further, secondary batteries according to the shape of the battery case, the nose is classified as type battery, a cylindrical battery, a prismatic battery, and a pouch-shaped battery. The electrode assembly mounted inside the battery case in a secondary battery is a power generation device capable of charge and discharge made of a stacked structure of electrodes and separators.
[7]
The electrode assembly is interposed a separator between the anode and the cathode of the active material is applied to a sheet-like (介 在) by winding the jelly roll (Jelly-roll) stacked one type, stacking a plurality of positive and negative electrodes in a membrane interposed state type by, and a take-up stack of unit cells stacked as separate film of the longer length / folding type can be roughly classified.
[8]
Typically, the shaped surface of the battery is high, the demand for prismatic secondary batteries or pouch type secondary battery which can be applied to products such as a mobile phone, a small thickness, the material surface in with the advantages of high energy density, discharge voltage, output stability the high demand for lithium secondary batteries such as lithium ion batteries, lithium ion polymer batteries.
[9]
Small mobile devices, in the device per unit of one or a couple of the battery cells as opposed to used, in the middle- or large-sized devices, such as an automobile high-output due to the large need, a number of the middle- or large-sized battery pack electrically connected to the battery cell is used as a unit cell, a capacitor the increased density have been developed, the higher the energy per cell while the cell needs.
[10]
The middle- or large-sized battery pack is so preferred that when manufacturing the small size and weight can, be stacked in high integration and the like is smaller prismatic battery, a pouch-shaped battery compared to the weight capacity is mainly used as a battery cell of the middle- or large-sized battery pack. Among them, was weighing the possibility of a small leak electrolyte enemy has attracted a lot of attention, especially low manufacturing cost pouch-shaped battery.
[11]
The pouch type battery, but likely candidates because of the various advantages as a unit cell of the medium- or large-sized battery pack, is a flammable material such as electrolyte leakage when the mechanical strength of the battery case was lower seal is separated has a high risk of fire problems. Further, when the four days (nail), etc. encountered in direct positive and negative when a foreign object coming through the cell, and the abrupt current flow therebetween, there is a problem that this reminds the heat and sparks, etc. is generated by a fire.
[12]
Ignition such as in the middle- or large-sized battery pack is a plurality of unit cells electrically connected with the purpose of high-power, large-capacity is a serious risk factor that may hinder safety.
Detailed Description of the Invention
SUMMARY
[13]
One aspect of the present invention is to provide a secondary battery that can increase the reliability of the battery to an external impact.
Problem solving means
[14]
A secondary battery according to an embodiment of the present invention, including a ground to ground the laminated electrode body and the electrode stacked body is formed with the electrode and the separator are mobilized to the outside, and is located at one side of the separation membrane of the ground portion in the electrode It may include a grounding member which is an abnormal current that flows into one side of the membrane is drawn.
Effects of the Invention
[15]
A secondary battery according to the present invention can be sent through the ground when the abnormal current by the external impact, an abnormal current flow flowing in the secondary battery outside prevent the heat generation and sparking. Therefore, it is possible to increase the stability of the battery against external shock.
Brief Description of the Drawings
[16]
1 is a perspective view illustrating a secondary battery according to an embodiment of the present invention.
[17]
Figure 2 is an exploded perspective view showing an example which is disposed to an embodiment of the electrode stack body grounding member in a secondary battery according to the present invention.
[18]
Figure 3 is an exploded perspective view showing another example disposed on the grounding member in the secondary battery electrode laminate according to one embodiment of the present invention.
[19]
4 is a plan view showing a first example in which the electrode and the ground terminal arranged in a secondary battery according to one embodiment of the invention.
[20]
5 is a plan view showing a second example in which the electrode and the ground terminal arranged in a secondary battery according to one embodiment of the invention.
[21]
6 is a plan view showing a third example in which the electrode and the ground terminal arranged in a secondary battery according to one embodiment of the invention.
[22]
7 is a plan view showing a fourth example in which the electrode and the ground terminal arranged in a secondary battery according to one embodiment of the invention.
[23]
8 is a conceptual diagram showing an example that represents the ground subject to the ground line in the secondary battery according to an embodiment of the present invention.
[24]
9 is a conceptual diagram of another example showing the ground subject to the ground line in the secondary battery according to an embodiment of the present invention.
[25]
10 is a conceptual diagram showing still another example showing the ground subject to the ground line in the secondary battery according to an embodiment of the present invention.
Best Mode for Carrying Out the Invention
[26]
An object of the present invention, particular advantages, and novel features will become more apparent from the detailed description and the preferred embodiments below that in connection with the accompanying drawings. In addition as the reference numerals to components in the drawings herein, hanhaeseoneun to like elements even though shown in different drawings, even if should be noted that and to have the same number as possible. In addition, the present invention is not be implemented in many different forms and limited to the embodiments set forth herein. Then, in the following description, detailed description of the related art which may unnecessarily obscure the subject matter of the present invention will be omitted.
[27]
[28]
1 is a conceptual diagram showing a rechargeable battery according to one embodiment of the invention.
[29]
Referring to Figure 1, the secondary battery 100 according to one embodiment of the invention includes a ground part 140 for grounding the electrode stacked body 110 and the electrode stacked body 110 to the outside. Also, the secondary battery 100 according to one embodiment of the present invention may include a battery case 130 accommodating the electrode laminate 110. The
[30]
[31]
In the following, with reference to FIG. 1 to FIG. 10, will be described in more detail for one embodiment the secondary battery of the present invention.
[32]
Referring to Figure 1, the electrode stacked body 110 can be formed as a power generation device can be charged and discharged, the electrode 113 and the separator 114 are mobilized. Here, the electrode stacked body 110 may be formed of a jelly roll type such as, for example, be stacked or stacking / folding type.
[33]
Membrane 114 can be formed may be formed on both surfaces of the electrode 113 to surround the outer surface of the electrode 113.
[34]
Electrode 113 is configured to include an anode 111 and a cathode 112. The Thus, the electrode stacked body 110 can be formed in a laminated in a positive electrode 111 / separator 114 / negative electrode 112 alternately. Here, the separator 114 may be located outside the outer side and the negative electrode 112 of the anode 111 and the cathode and between 112 and anode 111. The At this time, the membrane 114 can be formed surrounding the positive electrode 111 / separator 114 / negative electrode a 112 are stacked laminate electrode 110 as a whole.
[35]
In addition, a separator 114 is electrically insulated through the insulating material consists of a positive electrode 111 and negative electrode 112. The Here, the separator 114 is, for example, be formed of a polyolefin-based resin film such as polyethylene, polypropylene having a non-porous.
[36]
On the other hand, the electrode stacked body 110 may include a positive terminal 121 and negative terminal 122. The Here, the positive electrode terminal 121 is electrically connected to the side of the positive electrode 111, negative terminal 122 may be electrically connected to the side of the cathode 112. The
[37]
[38]
Ground 140 to ground the electrode stacked body 110 to the outside. Here, the ground portion 140 may include a grounding member 141 and the grounding member grounding line 142 to 141, keeping in contact with the outside that an abnormal current is drawn in the laminated electrode body (110). Thus, the ground unit 140 it is possible to extract the abnormal current incoming to a ground member 141 to the outside of the battery case (130).
[39]
More specifically, the grounding member 141 is an abnormal current that flows to a side of the separator 114, the electrode 113 is positioned on one side of the separator 114 can be drawn.
[40]
Also abnormal, that flows into the outermost surface direction of the grounding member 141 includes an electrode multilayer body 110 in the stacking direction of the electrode laminate unit 110 is provided on the outermost surface, the electrode stacked body 110 in the electrode 113 of the It may be the current is drawn. Here, the outermost part of the electrode laminate unit 110 is provided with a separator 114, a grounding member 141 may be positioned on the outer surface of the membrane 114. The In this case, the grounding member 141 may be provided on one side or one more than one side of the other surface of the electrode laminate 110 in the stacking direction of the electrode stack body (110).
[41]
Then, the grounding member 141 may be made of a ductile material. Here, the ground member 141 may be made of foil or film. At this time, the thickness of the ground member 141 may be composed of 1 ~ 2000 um.
[42]
In addition, the grounding member 141 may be formed of a conductor. In this case, the grounding member 141 may be formed of aluminum or copper material.
[43]
In addition, the grounding member 141 may be formed of a plate shape. In this case, the grounding member 141 may be formed of a rectangular plate containing, for example.
[44]
[45]
2 is an exploded perspective view showing an example which is disposed to an embodiment of the electrode stack body grounding member in a secondary battery according to the present invention, Figure 3 is a ground member is laminated electrode in a secondary battery according to one embodiment of the invention body an exploded perspective view showing another example disposed.
[46]
Laminated electrode body 110 may be formed of a plurality. In this case, for example, may be located between Referring to FIG. 2, the ground member 141 is a plurality of laminated electrode body (110). Further, another example, referring to Figure 3, the grounding member 141 is composed of multiple pieces, may be positioned between a plurality of electrode stacked body 110 and a plurality of electrode stacked body 110, the outermost side.
[47]
[48]
Figure 4 is a plan view showing a first example in which the electrode and the ground terminal arranged in a secondary battery according to one embodiment of the invention, Figure 5 is that the electrode and the ground terminal arranged in a secondary battery according to an embodiment of the present invention claim a plan view showing a second example.
[49]
Figure 6 is a plan view showing a third example in which the electrode and the ground terminal arranged in a secondary battery according to one embodiment of the invention, Figure 7 is an electrode, and a ground terminal arranged in a secondary battery according to an embodiment of the present invention It is a plan view showing a fourth example.
[50]
With reference to Figure 4 to Figure 7, the ground member 141 may include a ground terminal (141a) extending in the lateral direction.
[51]
A ground terminal (141a) may be formed in any one direction of four directions of the side grounding member 141 in the plan view of the ground member 141. In addition, the ground terminal (141a) may be formed of a plurality.
[52]
The positive terminal 121 and negative terminal 122 may be may be formed as in any one direction of the side of the four-way onto a plan view of an electrode stack body (110), formed in mutually different directions.
[53]
Here, the positive electrode terminal 121 and negative terminal 122 when formed on mutually different directions of the side four-way onto a plan view of an electrode stack body (110), a ground terminal (141a) is a positive electrode terminal 121 is formed in side, side negative terminal 122 is formed, may be located at any of the side of the positive terminal 121 and negative terminal 122 are not formed side.
[54]
Further, the positive terminal 121 and negative terminal 122 when formed in the same direction in terms of the four directions in the plan view of the electrode stack body (110), a ground terminal (141a) is a positive electrode terminal 121 and the negative electrode terminal (122 ) is a direction or the positive electrode terminal 121 and the negative electrode terminal (122 is formed) can be located in non-forming direction.
[55]
On the other hand, the first example, Referring to FIG. 4, the ground member 141 is formed of a rectangular shape, the ground terminal (141a) may be formed protruding in the width direction of the grounding member 141.
[56]
In the second example, also referring to Figure 5, the ground member 141 is formed of a rectangular shape, the ground terminal (141a) may be formed to project in the longitudinal direction of the grounding member 141.
[57]
Further, the third example, referring to Figure 6, the grounding member 141 is formed of a rectangular shape, the ground terminal (141a) may be formed in a plurality in the longitudinal direction of the grounding member 141.
[58]
And, the fourth example may also be referring to Figure 7, the ground member 141 is formed of a square shape. At this time, the ground terminal (141a) may be formed on the side corresponding to the side where the positive terminal 121 and negative terminal 122 are formed (or the opposite side).
[59]
[60]
8 is a conceptual diagram showing an example that represents the ground subject to the ground line in the secondary battery according to one embodiment of the invention, Figure 9 is another embodiment showing the ground subject to the ground line in the secondary battery according to an embodiment of the present invention is a conceptual diagram showing, Figure 10 is a conceptual diagram showing still another example showing the ground subject to the ground line in the secondary battery according to an embodiment of the present invention.
[61]
Referring to FIGS. 8 and 10, the ground line 142 and one side is electrically connected to the grounding member 141, the other side surface (G), the battery (C) or a conductive ground member in contact with the ground (G) 20 is grounded in any one or more, it is possible to extract the said abnormal current incoming to a ground member (141).
[62]
8, as one example, the other side connected to ground (G) of the ground line 142 may be discharged to the ground (G) an abnormal current drawn from the ground line 142.
[63]
Referring to Figure 9, another example, the battery (C) is capable of storing therein the abnormal current to be drawn from the ground line 142. Here, the battery (C) may be of g capacitor (Capacitor), for example.
[64]
In this case, the ground portion 140 may include a forward diode (Diode) (143) is provided on the ground line 142, so that only a current to flow from the side to the other side of the ground line 142.
[65]
10, yet another example, the conductive grounding member 20 may be provided in the lower portion of the vehicle 10 is made of a conductive non-woven fabric, in contact with the ground (G). Accordingly, the other side of the ground line 142 can emit abnormal current drawn from ground line 142 to ground (G) via a conductive grounding member (20).
[66]
[67]
A secondary battery 100 according to one embodiment of the present invention constructed as described above is not such a foreign matter is laminated electrode body 110 with a through or rupture the positive electrode 111 and negative electrode 112, meet the shop flow sudden abnormal current when the abnormal current by drawing out the electrode to the outside of the stacked body 110 via the ground unit 140 it is possible to prevent the occurrence of fire, such as heat and sparks.
[68]
[69]
Above been described in detail and the present invention through specific embodiments, This is to be described in detail the present invention, and is not a secondary battery according to the present invention is not limited thereto. The various embodiments by those skilled in the art within the spirit of the present invention will be that it is possible.
[70]
In addition, the specific scope of protection of the invention will become clear by the following claims.

Claims

[Claim 1]Electrode laminate formed the electrode and the separator is mobilized; And a secondary battery including a grounding position including the portion, and to one side of the membrane the grounding prong member which is abnormal current flowing in the incoming side of the separator in the electrode for grounding the electrode stack body to the outside.
[Claim 2]
The method according to claim 1, wherein the separation membrane is formed in the secondary battery of the electrodes on both sides.
[Claim 3]
The method according to claim 1, wherein the secondary battery separator is formed to surround the outer surface of the electrode.
[Claim 4]
The method according to claim any one of claim 1 to claim 3, wherein the ground member is a secondary battery which is provided on one side or the other side at least one of a surface of the electrode stack body in the stacking direction of the electrode stack.
[Claim 5]
The method according to claim 4, wherein the ground member is a secondary battery is formed of a plate shape.
[Claim 6]
The method according to claim 1, wherein the electrode stack is composed of a plurality of laminated, the grounding member is a secondary battery that is located between the plurality of the electrode stack.
[Claim 7]
The method according to claim 1, wherein the electrode stack is composed of a plurality of laminated, the grounding member is a secondary battery that is located in a plurality of and between the outermost electrodes of the laminated body.
[Claim 8]
The method according to claim 1, the thickness of the ground member is made of a secondary battery 1 ~ 2000 um.
[Claim 9]
The method according to claim 1, wherein the ground member is a secondary battery made of a conductor.
[Claim 10]
The method according to claim 9, wherein the ground member is made of a secondary battery, aluminum or copper material.
[Claim 11]
The method according to claim 1, wherein the ground member is made of a secondary battery with a soft material.
[Claim 12]
The method according to claim 1, wherein the ground part further comprises a secondary battery to keep the ground line side are electrically connected to the grounding contact member and the outer member to the ground.
[Claim 13]
The method according to claim 12, wherein the ground line is the ground is the other side, is grounded to any one or more conductive ground member in contact with the ground or battery, a secondary battery to draw a said abnormal current incoming to the ground member.
[Claim 14]
The method according to claim 13, wherein the grounding unit secondary cell comprising a diode that is provided on the ground line so that only the side of the other electric current flow from the one side of the ground line.
[Claim 15]
The method according to claim 12, the secondary battery to said ground member includes a ground terminal is formed extending in the side connected to the ground line.
[Claim 16]
The method according to claim 15, wherein the ground terminal is a secondary battery that is formed to project in any one or more directions of the plan view 4 in the direction of the grounding member.
[Claim 17]
The method according to claim 16, wherein the ground terminal is formed of a plurality of secondary batteries.
[Claim 18]
The method according to claim 15, wherein the electrode comprises a negative electrode and a positive electrode, and is provided with a negative electrode terminal on a side surface of the cathode, is equipped with a positive electrode terminal on a side surface of the positive electrode, the ground terminal is said in the plan view of the electrode laminate side of the positive electrode terminal is formed, the negative terminal side is formed, the positive electrode terminal and the secondary battery is located in any of the side of the side not provided with the negative electrode terminal.
[Claim 19]
The method according to claim 18, wherein the positive electrode terminal and the negative electrode terminal is formed in the same direction from four directions in the plan view of the electrode stack body, the ground terminal is the positive terminal and is formed in the direction or the positive electrode terminal and the said negative terminal a secondary battery that is located in the direction in which the negative electrode terminals are not formed.
[Claim 20]
The method according to claim 1, comprising a battery case for receiving the electrode stacked body, and the ground portion are drawn out to the outside of the secondary battery, the battery case to the abnormal current is drawn to the ground member.