Art
[1]
Mutual citations and related applications
[2]
This application claims the benefit of priority based on the October 14, 2016 Korea Patent Application No. 10-2016-0133815, 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 method of manufacturing a secondary battery, and such a secondary battery comprising an electrode lead, and more particularly, the secondary battery including the electrode lead which can reduce the volume of the prepared secondary battery, the same capacity as compared with the conventional, and such second It relates to a method for manufacturing a battery.
BACKGROUND
[5]
Repeating the charge and discharge available rechargeable battery (secondary battery) includes an electrode assembly (electrode assembly) which is produced by laminating alternately the electrode and the separator. At this time, the secondary batteries they are common to have electrical energy stored in the electrode assembly includes a configuration as to be supplied to the power demand of the outer electrode assembly and the electrical lead electrode (lead electrode) is connected to. The electrode assembly is electrically connected to the electrode lead is brought let the electric energy from the outside to send or receive electrical energy stored in an electrically re-electrode assembly and the power demand, such as the electronic apparatus to the outside (discharge) (filled).
[6]
1 is a plan view showing the structure of a secondary battery comprising an electrode lead according to the prior art, Figure 2 is a plan view showing the structure of the electrode leads according to the prior art.
[7]
1 and 2, the secondary battery (1) may include an electrode assembly (2), at least one electrode lead (3). At this time, the electrode lead (3) may include the internal connection (6) electrically connected to the external connection (4), the electrode assembly (2) electrically connected to the external electronic devices. The electrode lead 3 is formed between the external connecting portion (4) and the inner connecting portion (6), and may include an isolation unit (5) surrounded by an insulating film (7). Due to the presence of the insulating portion (5), the inner space of the secondary battery can be sealed from the outer space improves the stability of the electrode assembly.
[8]
Electrode lead (3) of the secondary battery 1 according to the prior art as described above may comprise the internal connection 6 and the external connection 4, an external connection as shown in FIGS. 1 and 2 ( 4) and the inner connecting portion (6) it will have a protruding shape from a boundary of the secondary battery (1). In particular, the external connecting portion (4) is projected toward the outer space of the secondary battery (1) it has a problem of increasing the overall volume of the secondary battery (1). In addition, the capacity of the inside connecting portion (6) is a secondary battery (1) there protrudes toward the inner space, the size of the electrode assembly (2) mounted in the inner space of the rechargeable battery (1) is reduced resulting in a secondary battery (1) this was a problem that reduction.
Detailed Description of the Invention
SUMMARY
[9]
Accordingly, it is an object to achieve the present invention, a secondary battery, in particular, to provide a secondary battery having an improved capacity per unit volume more than the conventional by improving the structure of the electrode leads.
Problem solving means
[10]
According to one aspect of the present invention for achieving the above object, an electrode assembly comprising an electrode and a separator; Packaging material for containing the electrode assembly; And at least one electrode lead connected to the electrode assembly; And wherein the electrode lead is wrapped by the packaging material in the region of the insulating portion; And the exposed portion that is not wrapped by the exterior region; Including at least some of, and the exposure unit is a secondary battery that is formed inside the insulating portion it is provided.
[11]
The electrode lead, the connection being connected to the electrode assembly; Including more, and the connecting portion may be formed in the inner space formed by the packaging material.
[12]
The exposing portion may be provided in the inside of the outermost edge of the packaging material.
[13]
The electrode lead and being provided with an insulating member between the packaging material, the packaging material and the insulating member may both be a through-hole formed at a position corresponding to the position where the additional exposure.
[14]
The packaging material is packaging material body which forms the body of the casing; And a sealing part for sealing an inner space formed by the exterior material from the outer space of the casing; Including, and the exposed portion may be formed on an inside of the sealed portion.
[15]
The electrode lead, the connection being connected to the electrode assembly; Including more, and the connecting portion may be formed on an inside of the sealed portion.
[16]
The sealing portion may be folded to the exterior body and the sealing boundary between the folded portion in the axial parts.
[17]
According to another aspect of the present invention for achieving the above object, the method comprising: preparing an electrode assembly and the casing for accommodating the electrode assembly comprising an electrode and a separator; Step for receiving the electrode assembly to the casing; Isolated phase such that the insulating region in the electrode lead part that is formed by the exterior material formed by wrapping the lead electrode connected to the electrode assembly into the casing; And notching step such that additional exposure that is not wrapped around the electrode lead by the exterior region is formed by removing a portion of the insulating portion; To contain and, in said notching step, at least a portion of said exposed portion is a method for manufacturing a secondary battery to be formed inside the insulating portion is provided.
[18]
The electrode lead, the connection being connected to the electrode assembly; Including, wherein the connection portion is connected to the step of being formed in the space formed by the casing, connecting the connection portion with the electrode assembly; The may further include.
[19]
In said notching step, the exposed portion may be provided inside of the outermost edge of the packaging material.
[20]
There is provided an insulating member between the electrode lead and the casing, in said notching step, the casing and the insulating member may both be a through-hole formed at a position corresponding to the position where the additional exposure.
[21]
The packaging material is packaging material body which forms the body of the casing; And a sealing part for sealing an inner space formed by the exterior material from the outer space of the casing; , Contain at said notching step, the exposed portion may be formed on an inside of the sealed portion.
[22]
The electrode lead, the connection being connected to the electrode assembly; Including, the step of connecting the connecting portion is formed on an inside of the sealed portion, connecting with said connecting portion the electrode assembly; The may further include.
[23]
A folding step of between said sealing portion being provided with the electrode lead, the folding parts of the casing by the sealing body and the sealing boundary between the folded portion in the axial portion; The may further include.
[24]
In the connecting step, the connection portion and the electrode assembly may be connected by welding.
Effects of the Invention
[25]
The purpose of the present invention to achieve the secondary battery, in particular, it is possible to manufacture a secondary battery having an improved capacity per unit volume more than the conventional by improving the structure of the electrode leads.
Brief Description of the Drawings
[26]
1 is a plan view showing the structure of a secondary battery comprising an electrode lead according to the prior art.
[27]
2 is a plan view showing the structure of the electrode leads according to the prior art.
[28]
3 is a plan view showing the structure of a secondary battery comprising an electrode lead according to one embodiment of the invention.
[29]
4 is an enlarged plan view showing an insulating structure section of the electrode lead according to one embodiment of the present invention.
[30]
5 is an enlarged plan view showing the structure of the isolated parts of the electrode leads according to another embodiment of the present invention.
[31]
Figure 6 is a perspective view showing an example of the structure of a secondary battery according to one embodiment of the invention.
Mode for the Invention
[32]
With reference to the drawings to describe the structure of a secondary battery according to one embodiment of the invention. But it should be understood that the detailed description and specific examples, the present invention patent is not limited As a result, described below, and the technical idea of ​​the present invention by one of ordinary skill in the art various embodiments are possible within the equivalent scope of the claims. FIG.
[33]
The structure of the secondary battery
[34]
3 is a plan view showing the structure of a secondary battery comprising an electrode lead according to one embodiment of the invention.
[35]
3, the secondary battery 10 in accordance with one embodiment of the present invention, the casing 100 and the electrode for receiving the electrode assembly 120, the electrode assembly 120 including an electrode and a separator (not shown) It may include one or more electrode lead 130 connected to assembly 120. The electrode assembly 120 may be provided in the space formed by the exterior material 100. The In addition, Figure 3 shows a case equipped with a two-electrode lead 130, and although the technical concept of the present invention is not limited to this. If it is included at least one electrode lead (130) at least a portion of the electrode lead may be connected with the negative electrode tab (not shown) of the electrode assembly 120, the other electrode lead is an anode tap (not shown in the electrode assembly 120 during ) and it can be connected. On the other hand, the electrode leads may be any one of aluminum, copper, nickel or nickel-plated copper.
[36]
On the other hand, it means that 'connection' in this specification, may be one which means that the state in which to exchange electrical energy between the configuration. Therefore, the configuration described in that connection herein may be coupled, but may be connected directly, if the state in which to exchange electrical energy with each other indirectly by the different configurations from each other.
[37]
Casing 100 constituting the main body of the secondary battery 10 may be a pouch (pouch). That is, the secondary battery 10 in accordance with one embodiment of the present invention may be a pouch-type secondary battery. However, the invention is not limited to this, if having the casing to seal the electrode assembly 120 from the outside can be applied regardless of the nature of the packaging material.
[38]
As described above, the electrode lead 130 has a configuration that is connected to the electrode assembly 120, supplying the electrical energy stored in the electrode assembly 120 to the outside, or to an external supply of electrical energy to the electrode assembly 120 It can play a role. In the former case it may be a discharge, and the latter may be filled.
[39]
On the other hand, the casing 100 has a sealing portion 110 that seals from the external space of the case 100, the internal space defined by the casing body (100a) and a casing 100 that forms the body of the case (100) It can be included. The sealing part 110 may have a protruding shape toward the outside from, the casing body (100a) as shown in FIG. 3 or FIG. At this time, the electrode lead 130 may be provided on the inside without protruding out of the casing, the sealing unit 110. By ensuring that the electrode leads 130 are projected toward the outside of the packaging material, it is possible to reduce the volume as compared with the secondary battery having the same capacity, it is possible to improve the volume capacity of the secondary battery.
[40]
4 is an enlarged plan view showing an insulating structure section of the electrode lead according to one embodiment of the present invention.
[41]
3 and 4, the electrode lead 130 of the secondary battery 10 in accordance with one embodiment of the invention is isolated in that it is not exposed to the outer space of the exterior area as a wrap in the region by a casing (100) unit 132, and a region that is not surrounded by the casing 100 may include an area of ​​the exposed portion 134 is exposed to the external space of the case 100. the Figure 4 but illustrates the case where one exposure unit 134, the exposure unit may alternatively be two or more.
[42]
The electrode lead 130 may further include a configuration of connecting portion 136, which is connected to the electrode assembly. Connection 136, FIG. 4 of the insulation portion 132 may be formed on the inner side, projects from Alternatively, the insulating section 132, as shown in FIG. 5, the internal space defined by the casing, as shown in on may be formed. Further, the connection portion 136 may be connected by the electrode assembly and welding.
[43]
Exposed portion 134 of the electrode lead 130 in accordance with one embodiment of the present invention as described above may be in the region exposed to the external space of the case, the electrode lead 130 is provided on an inner side sealing part 110 It can be. Thus, exposed portion 134 may be formed by through-hole is formed in a portion of the exterior packaging material. Further, the exposed portion 134 and the connection portion 136, as shown in Figure 4 may be formed on the inner side of the insulating portion 132. The Exposure unit 134 in may be connected with an electronic device (not shown) of the outside connecting portion 136. In the case that there be connected to the electrode assembly, the thus exposed portion and the connecting portion formed inside the insulating portion, unlike the prior art the electrode lead, a separate projection for connection to an external electronic device and an electrode assembly is not required. Therefore, the removal of the configuration the configuration (inner connecting portion (6 in Fig. 2)) projects toward the (external connection 4 in Fig. 2) and the inner space of the casing projecting towards the external space of the case, than the internal packaging material as allows the electrode assembly having a larger volume to be mounted, at the same time is able to reduce the overall volume of the secondary battery, it is a technical effect which improves the volume capacity of the secondary battery. Also, it electrode lead as shown in Figure 3 in order to maximize the volume capacity of the secondary battery 130 may not exist at all the protruding area in the outer space of the case, at this time, the exposure unit 134 facer a may be formed in the outermost border (see Fig. 3 and 4).
[44]
On the other hand, the casing may be the sealability drop even in a configuration in which seal the inner space and outer space of the secondary battery. In particular, in many cases in the sealing part it is sealed after the electrode assembly is mounted in the inner space of the case dropping the sealability of the packaging material.
[45]
In this case, the insulating member 140 between the sealing portion may be provided to improve the sealing property of the secondary battery. An insulating member, if provided between Specifically, the electrode lead 130, the sealing portion 110, as shown in Figure 3 may be provided with an insulating member 140 between the electrode lead 130 and the casing 100 . An insulating member as 140 shown in Figure 4 may surround the entire electrode lead 130, and may surround a portion of the electrode lead 130, as shown in FIG. May contain olefin-insulating member 140 may include, for example, polyester may be a insulating material containing a polymer film, the insulating member 140.
[46]
On the other hand, the exposure unit 134 as described above may be may be formed on the inside, the through-hole in the casing 100 or the sealing part (110) for this purpose in the insulating portion 132 is formed, similarly, the insulating member 140 also can be through-hole is formed. At this time, in order to form the exposed portion 134, a casing and an insulating member may be a through-hole formed at a position corresponding to each other. This is because the area exposed to the external space of the case and the secondary battery of the electrode lead that is not the case at a position where the through hole correspond to each other is formed in the insulating member may be due not formed.
[47]
On the other hand, the electrode lead may have a plate (plate) shape. Exposure portion 134 when the electrode lead has a plate shape may be formed on the main surface - surface occupies the widest area of ​​the surface (plane) formed on the electrode lead (main plane). At this time, the connecting portion may be formed on the other main surface and the major surface exposed portion is formed. However, in contrast, exposure portions may be all formed on the same surface of the electrode lead.
[48]
Further, the exposure unit 134 as described above may be formed on the inner side (or inside of the outermost edge of the casing 100) of the insulating part 132, more specifically, shown in Figure 3 exposure unit 134 as shown may be formed on the inner side of the sealing part (110). Connection 136 may be formed on the inner side of the sealing part 110 (see Fig. 4), or, without being formed on the inner side may be formed in the space defined by the casing (see Fig. 5).
[49]
5 is an enlarged plan view showing the structure of the isolated parts of the electrode leads according to another embodiment of the present invention.
[50]
5, the exposure unit 134 when the sealing unit (or the insulating portion 132) is formed on the inner side of the, connecting portion 136, which is an area other than the inner sealing portion formed in the space defined by the casing the shows. However, the fact that in other embodiments of the invention, exposed portion 134 is formed on the inner side of the insulating portion 132 so that it is not exposed to the outer space of the exterior area as a wrap in the region by the cladding 100 of the is the same as the one embodiment of the invention.
[51]
In accordance with one embodiment of the present invention, the exposed portion may be formed in the inner insulating portion (or, the inner sealing portion), and therefore, that the technical effect of reducing the volume of the secondary battery occurs is the foregoing. Nevertheless, this is an increase in volume of the secondary battery by a portion protruding sealing problems if the sealing portion projecting from the casing body exists.
[52]
Figure 6 is a perspective view showing an example of the structure of a secondary battery according to one embodiment of the invention.
[53]
According to one embodiment of the present invention to solve the problem caused the sealing portion projecting from the casing body, the sealing part can be folded 110. That is, as the sealing portion 110 shown in Figure 6 can be folded by folding the boundary part 150 of the case body (100a) and the sealing part 110 in the axial. This is because the casing body (100a) may be understood to be folded by the folding unit 150 as an axis. The sealing portion being foldable by minimizing protruding from the body portion of the seal casing can be reduced more than the volume of the secondary battery.
[54]
Hereinafter will be described a method for manufacturing a secondary battery according to the invention with reference to the above description and the drawings.
[55]
Method of manufacturing a secondary battery,
[56]
After the first exposure unit to form insulating parts according to the invention may be formed by removing a part of insulating parts. Forming an exposed portion by removing a part of insulating portions in this way is referred to as "notching (notching) '.
[57]
On the other hand, to, the respective steps as the manufacturing method are arranged in order of the secondary batteries referred to is arbitrary and, the manufacturing process of the secondary battery may not be limited to the order the steps are arranged. This may equally be applied in the interpretation of the claims.
[58]
In this case, the method of manufacturing the secondary battery according to an embodiment of the present invention includes the steps of: preparing an electrode assembly and the casing for accommodating the electrode assembly comprising an electrode and a separator; Step for receiving the electrode assembly to the casing; Isolated phase such that the insulating region in the electrode lead part that is formed by the exterior material formed by wrapping the lead electrode connected to the electrode assembly into the casing; And notching step such that additional exposure that is not wrapped around the electrode lead by the exterior region is formed by removing a portion of the insulating portion; It may contain.
[59]
At this time, in the notching step, at least a portion of the exposed portion may be formed inside the insulating portion. Further, in the notching step, some of the exposed portion may be formed in the inner space formed by the exterior material, the exposed portion may be provided inside of the outermost edge of the packaging material.
[60]
Also, it may be provided with the electrode lead with an insulating member between the packaging material, wherein, in step notching the packaging material and the insulating member may both be a through-hole formed at a position corresponding to the position where the additional exposure. That is, in the one notching step according to an embodiment of the present invention, a portion of the insulation member as well as a part of the packaging material can also be removed. This is because a part and a part of the electrode lead will need to remove any part of the packaging material of the insulating member if the electrode lead is surrounded by an insulating member and the casing is exposed to the outside.
[61]
Further, the packaging material, the packaging material body which forms the body of the casing; And a sealing part that seals the internal space defined by the casing from the outer space of the case; It may comprise, at this time, in the notching step, the exposed portion may be formed inside the sealing portion.
[62]
Further, the method of manufacturing the secondary battery according to an embodiment of the present invention, connection step of connecting the connection portion and the electrode assembly, which is formed on the electrode lead; The may further include. At this time, the connecting portion may be formed on the inner sealing portion. In the connection step, the connection can be coupled to the electrode assembly by welding.
[63]
Further, the method of manufacturing the secondary battery according to an embodiment of the present invention, the sealing parts of the folding step of folding the packaging material by the sealing body and the boundary between the folded portion in the axial portion; The may further include.
[64]

Claims
[Claim 1]
An electrode assembly comprising an electrode and a separator; Packaging material for containing the electrode assembly; And at least one electrode lead connected to the electrode assembly; And wherein the electrode lead is wrapped by the packaging material in the region of the insulating portion; And the exposed portion that is not wrapped by the exterior region; Including at least some of, and the exposure unit is a secondary battery that is formed inside the insulating portion.
[Claim 2]
The method according to claim 1, wherein the electrode lead, the connection portion connected to the electrode assembly; Including more, and the secondary battery connection is formed in the inner space formed by the packaging material.
[Claim 3]
The method according to claim 1, wherein the exposing portion is provided in the secondary battery of the outermost edge of the packaging material.
[Claim 4]
The method according to claim 1, wherein the electrode is provided with a lead and an insulating member between the packaging material, the packaging material and the insulating member is a secondary battery, all of which through-hole is formed at a position corresponding to the position where the additional exposure.
[Claim 5]
The method according to claim 1, wherein the packaging material is packaging material body which forms the body of the casing; And a sealing part for sealing an inner space formed by the exterior material from the outer space of the casing; Including, and the exposing portion is formed on an inside of the secondary battery sealed portion.
[Claim 6]
The method according to claim 5, wherein the electrode lead, the connection portion connected to the electrode assembly; Including more, and the secondary battery connection is formed on an inside of the sealed portion.
[Claim 7]
The method according to claim 5 or claim 6, wherein said sealing portion being foldable secondary battery by the casing body and the sealing boundary between the folded portion in the axial parts.
[Claim 8]
A step of preparing an electrode assembly and the casing for accommodating the electrode assembly comprising an electrode and a separator; Step for receiving the electrode assembly to the casing; Isolated phase such that the insulating region in the electrode lead part that is formed by the exterior material formed by wrapping the lead electrode connected to the electrode assembly into the casing; And notching step such that additional exposure that is not wrapped around the electrode lead by the exterior region is formed by removing a portion of the insulating portion; Including, and in the notching step, at least a portion of the exposed portion is method of producing a secondary battery that is formed inside the insulating portion.
[Claim 9]
The method according to claim 8, wherein the electrode lead, the connection portion connected to the electrode assembly; Including, wherein the connection portion is connected to the step of being formed in the space formed by the casing, connecting the connection portion with the electrode assembly; The method of the secondary battery further comprising.
[Claim 10]
The method according to claim 8, in said notching step, the exposing portion of the method of manufacturing the secondary battery is provided inside of the outermost edge of the packaging material.
[Claim 11]
The method according to claim 8, being provided with the electrode lead with an insulating member between the packaging material, in said notching step, the casing and the secondary battery of the insulating member both being through-hole is formed at a position corresponding to the position in addition the exposure method.
[Claim 12]
The method according to claim 8, wherein the packaging material is packaging material body which forms the body of the casing; And a sealing part for sealing an inner space formed by the exterior material from the outer space of the casing; In included, wherein the notching step, the exposing portion of the method of producing a secondary battery that is formed on an inside of the sealed portion.
[Claim 13]
The method according to claim 12, wherein the electrode lead, the connection portion connected to the electrode assembly; Including, the step of connecting the connecting portion is formed on an inside of the sealed portion, connecting with said connecting portion the electrode assembly; The method of the secondary battery further comprising.
[Claim 14]
The method according to claim 12 or claim 13, further comprising: a folding between the sealing part being provided with the electrode lead, the folding and the sealing parts of the casing body and the sealing boundary between the folded portion in the axial portion; The method of the secondary battery further comprising.
[Claim 15]
The method according to claim 13, in the connecting step, the connection portion and the electrode assembly manufacturing method of the secondary battery is connected by welding.