[0047] Next, the technical solutions in the present application embodiment will be described in the following examples, and the embodiments described herein are described herein, not all of the embodiments of the present disclosure. Based on the embodiments in the present application, all other embodiments obtained without creative labor are not made in the pre-creative labor premises.
[0048] See Figure 1- Figure 12 , Figure 11 It is an explosion of a battery provided by the embodiment of the present application. figure 1 It is a schematic structural diagram of a battery end cap, which is provided in the present application embodiment, such as figure 1 and Figure 11 As shown, the battery includes a battery end cap, a battery outer cylinder 61, and a battery component 62.
[0049] The battery assembly 62 is housed in the battery outer cylinder 61, the battery end cap seal is connected to the end opening of the battery outer cylinder 61; the electrical core assembly 62 is passed through a ship 66 and said Battery end cover connection;
[0050] The end cover body 10, pole column 20, and the first insulating pad 30 comprise a disc portion 21 and a column portion 22 extending from the disc portion 21, the column portion 22 and the disc. The portion 21 coaxial, the diameter of the column portion 22 is smaller than the diameter of the disc portion 21;
[0051] A first through hole 11 is provided on the end cover body 10, and the extension end of the column portion 22 passes the first through hole 11;
[0052] The first insulating pad 30 is disposed between the disc portion 21 and the end cover body 10, and the end cap body 10 and the pole 20 are seal through the first insulating pad 30.
[0053] As described above, by the setting of the first insulating pad 30, the associated fitting of the conventional riveting method is replaced, while the end cover body 10 and pole column 20 can be protected while the end cap body 10 and the pole 20 are connected at firmly connected end capsule 10 and pole column 20. Good sealing to reduce the risk of leakage in the battery end cover, and reduce the manufacturing cost of the battery, reduce the difficulty of the battery, which can be understood as a cylindrical structure of a lithium ion battery.
[0054] It should be noted that the above battery end cap is Figure 11 The top end cap 60 and the bottom end cover 63 shown in. In a specific example, the battery includes a battery having a battery upper end cap and a battery underside, and / or a structure of the lower end cover under the battery. figure 1 As shown, that is, the upper end cover and / or the lower end cover of the battery can include an end cap body, a pole column, and an insulating pad located between the end cap body and the pole column.
[0055] Exemplary, the first insulating pad 30 may be a sealing rubber ring or a sealing spacer made by a polypropylene material. During the production process, the user can adaptively adjust the production material of the first insulating pad 30 based on the actual needs. The present application is not limited thereto.
[0056]As the lithium ion battery specification changes, the area of the connection region between the pole column 20 and the end cover body 10 also changes accordingly. In the case where the area of the connection region is increased, in order to ensure a good insulation relationship between the polar column 20 and the end cover body 10, the volume of the first insulating pad 30 is required to increase the volume of the first insulating pad 30 (the disc portion of the pole column 20) The edge of 21 is projection within the first insulating pad 30), which enables a better sealing connection effect between the pole column 20 and the end cover body 10 (more stable, and more sealed); When the area of the connection area is reduced, the volume of the first insulating pad 30 is required to be adapted, and when the lithium ion battery is short-circuited, the pole column 20 can also be present as a valve for the pressure relief. Improve the safety performance of lithium ion batteries to a certain extent.
[0057] The user can adaptively adjust the volume of the first insulating pad 30 based on the actual needs (such as the specifications of the lithium ion battery, the safety requirements of the lithium ion battery, etc.) (i.e., balance between safety performance and sealing connection), this The application examples are not limited thereto.
[0058] Optional, such as figure 2 and image 3 As shown, the inner wall of the through hole 11 is provided between the column portion 22;
[0059] The first insulating pad 30 includes a first portion 31 extending within the first stilled groove 40;
[0060] and / or,
[0061] A first loop groove 12 is provided on the end cover body 10, and the first insulating pad 30 is located within the first ring groove 12;
[0062] The first insulating pad 30 and the inner wall of the first loop 12 are formed with a second stillad groove 13;
[0063] The first insulating pad 30 includes a second portion 32 that extends into the second stillad groove 13.
[0064] As described above, the arrangement of the first stilled groove 40 is used to penetrate the operation of the first through hole 11, to facilitate the installation of the polar column 20 on the end cover body 10; The first overflow groove 40, and / or the presence of the second overflow groove 13, the first insulating pad 30 is accommodated on the first portion 31 and / or the second portion 32 of the outer fluid of high temperature and high pressure conditions, by the first overflow The blend of the first portion 31 of the end of the end of the end of the end of the end, and / or the second portion 32 of the second stillad groove 13 and the first insulating pad 30, further strengthen the pole column 20 and end caps The connection reliability between the body 10, the sealing performance of the pole column 20 and the end cover body 10; wherein the arrangement of the first loop groove 12 is to facilitate the placement of the first insulating pad 30 on the end cover body 10. At the same time, the flatness and aestheticity of the surface of the end cover body 10 are held.
[0065] It should be noted that the first portion 31 can be understood to apply a pressure to the end cap body 10 and / or pole 20 in a high temperature environment, and is formed between the first insulating pads 30 between the end cap body 10 and the pole column 20. Melting, and spilled to a portion within the first stillad groove 40.
[0066] In the same way, the second portion 32 described above can be understood as a pressure on the end cap body 10 and / or pole column 20 in a high temperature environment, and is melted in the first insulating pad 30 between the end cap hosh 10 and the pole column 20. And the portion of the second overflow groove 13 is overflow.
[0067] The first stillad groove 40 and the second stiller groove 13 are each annular, both of the radially width of the first through hole 11, greater than or equal to. Mm, less than or equal to. Mm; in the first through hole 11 The axial height is greater than or equal to. Mm, less than or equal to. Mm.
[0068] Alternatively, the first sealing tank 40 is also provided with a first sealing glue, and / or a second sealing glue is also provided.
[0069] As described above, after the first portion 31 and the second portion 32 of the first insulating pad 30, the vacancies and second stillets of the first stilled glue 40 are used in the first portion 31 and the second portion 32 of the first insulating pad 30. The vacant moiety of the groove 13 is filled to avoid voids in the first stilled tank 40 and the second stillad groove 13 to ensure that the pole column 20 and the end cover body 10 can maintain optimal sealing performance and insulation performance.
[0070] Illustrative, the first sealing gel and the second sealant may be at least one of acrylic acid, epoxy, polyurethane, a mixed hardening agent, actually, the first sealing gel and the second seal. The glue can also be made of other materials with insulated and sealing effects, and this application embodiment is not limited.
[0071] Alternatively, the plane of the distal portion 21 of the pillar portion 22 is located at the plane of the end cover body 10.
[0072] On one side of the ship 66 is connected to the electrical core assembly 62, the other side of the shifting piece 66 is connected to the pole column 20, by the above setting, avoid contact between the adapter 66 and the end cap body 10, reducing the interior of the battery There is a risk of short-circuit issues.
[0073] Further, the column portion 22 includes a first column section in the through hole 11 and a second column section of the through hole 11, the second column section to the other side of the aforementioned shift sheet 66.
[0074] Alternatively, the end cover body 10 is also provided with a second insulating pad 50, the second insulating pad 50, is located on one side surface of the first insulating pad 30.
[0075] As described above, the strip 66 and the end cover body 10 are separated by the setting of the second insulating pad 50, and the risk of short-circuit problems in the battery is further reduced.
[0076] The second insulating pad 50 is located on one side surface of the end cap body 10 and is appreciated that the first insulating pad 30 and the second insulating pad 50 are disposed on both sides of the end cap body 10.
[0077] It should be noted that under high temperature high pressure conditions, the edge portion of the second insulating pad 50 can also overflow within the first stilled groove 40 to fit the first portion 31 31 and the first sealing glue of the first insulating pad 30. The spilito slot 40 is filled.
[0078] Alternatively, a pressure relief through hole 2711 is provided on which an explosion-proof valve 28 is provided in the pressure relief through hole 2711.
[0079] As described above, when the blending through hole 2711 and the explosion-proof valve 28 are provided, the lithium ion battery is automatically relocated during the occurrence of a lithium ion battery, and the lithium-ion battery will be bursted, and the lithium-ion battery is avoided. Safety performance of lithium ion batteries.
[0080] Further, a second insulating pad 50 is further provided on the end cover body 10, the second insulating pad 50, is located on one side surface of the first insulating pad 30, the first insulating pad 30. A lack of groove 51 is provided on the dicing insulating pad 50, which is opposite to the pressure relief through hole 2711.
[0081] As described above, in the case where the second insulating pad 50 is provided on the end cover body 10, there is no occlusion between the pressure relief through hole 2711 and the battery cavity to occur in the inside of the lithium ion battery. When the abnormality such as short circuit, make sure the explosion-proof valve 28 will open smoothly, which can further enhance the safety performance of the lithium ion battery.
[0082] Alternatively, the disc portion 21 is provided with a first injection liquid hole 23a, the first injection liquid hole 23a penetrates the disc portion 21 and the column portion 22, and the disc portion 21 A first sealing nail 26a serving for the first nickal hole 23a is provided.
[0083] As described above, in the case where the first injection liquid hole 23a is opened on the disc portion 21, it is preferable to provide the first injection hole 23a and the through hole 11 coaxial, and the lithium ion battery formed is formed. The battery cell is a hollow structure, and there is a cylindrical core hole 65 in the battery cell (the core hole 65 and the through hole 11 coaxial), using the first injection hole 23a, the user can use the hydrating needle The electrolyte is directly injected into the wick hole 65, which not only shortens the liquidation time, but also increase the infiltration efficiency of the electrolyte on the internal cells of the electrolyte; after the liquid is completed, the electrolyte is completed by the first seal 26a. Closures of the first liquid hole 23a.
[0084] Alternatively, the first nipple hole 23a includes a first aperture and a second aperture extending in the thickness direction of the disc portion 21;
[0085] The disc portion 21 is also provided with a third insulating pad 25a between the bottom surface and the first sealing nail 26a of the first aperture.
[0086] The first sealing nail 26a is welded to the disk portion 21 to complete the closure of the first injection liquid hole 23a, based on this, the first sealing 26a is enhanced using the third insulating pad 25a (bossed). The connection intensity between the disc portions 21; the third insulating pad 25a can be fused under high temperature and high pressure conditions, and the gap between the first sealing nail 26a and the disc portion 21 is filled to improve the first. The sealing nail 26a is sealed to the first injection liquid hole 23a.
[0087] It should be noted that in order to facilitate the placement of the third insulating pad 25a, the first sealing groove 24a adapted to the third insulating pad 25a can be disposed on the disc portion 21 to store the third insulating pad 25a, keep the disc The flatness of the surface 21 surface.
[0088] Alternatively, the shifting piece 66 is provided with a via 67 provided corresponding to the first injection liquid hole 23a.
[0089] As described above, the arrangement of the via hole 67 is used to avoid the operation of the adapter 66 to interfere with the hydraulic needle to explore the operation of the first injection hole 23a, ensuring that the electrolyte in the hydraulic needle can be smoothly injected via the first liquid hole 23a. The core hole 65 is inserted.
[0090] It should be noted that in the case where the pressure relief through hole 2711 is provided on the battery end cap corresponding to the ship 66, the via 67 on the shifting piece 66 can be removed accordingly to reduce the difficulty of the shift piece 66. Improve the production efficiency of the battery.
[0091] Alternatively, the shifting piece 66 includes a plurality of bent segments extending in the height direction of the battery outer cylinder 61, each bent section respectively provided a via corresponding to the first liquid hole 23a, respectively. 67.
[0092] With the arrangement of multiple bent segments, the shifting piece 66 can adapt to the height of the height of the battery outer cylinder 61 to adapt to the distance between the different specifications of the electrical component 62 and the pole column 20 to ensure A good electrical connection relationship can be obtained by the shifting piece 66 between the electrical core assembly 62 and the pole column 20.
[0093] It should be noted that the via 67 corresponding to the first injection hole 23a is provided in terms of a bent section, and the first nipple hole 67 is located within the disc portion 21. The projection is provided by the above setting, and when the nipple can be explored into the first injection hole 23a, the collision and 剐 between the niche needle and the adapter 66 are avoided, and the smooth progress of the liquid-liquid process is ensured.
[0094] Exemplary, such as Figure 4 As shown, the ship 66 includes a first fold segment 661, a second fold segment 662, and a third fold segment 663, a first folded section 661, a second fold segment 662, and a third folded section 663. Have a via 67.
[0095] Alternatively, the electrical core assembly 62 includes a wired core hole 65 that penetrates the electrical core assembly 62, the via 67, and the wind hole 65 are coaxial.
[0096]As described above, in the case where a via hole 67 is provided on the ship 66, the via 67 and the wick hole 65 are disposed at the same shaft to facilitate placement and positioning of the shift sheet 66 on the end of the electrical core assembly 62. However, after the user is placed in the end of the electrical core assembly 62, it can quickly determine the adapter by adjusting the position of the ship 66 in the end of the electrical core assembly 62. The placement position of 66, which is subsequently welded based on the placement position to complete the connection between the adapter 66 and the electrical core assembly 62.
[0097] Alternatively, the end cover body 10 has a second nicking hole 23b, and the second nicking hole 23b penetrates the end cover body 10, and the end cover body 10 is also provided with a sealing said The second sealing nail 26b of the second injection liquid hole 23b.
[0098] As described above, in order to complete the injection operation of the electrolyte, in addition to the setting of the first injection liquid hole 23a on the pole 20, the second injection hole 23b, the second liquid hole may be opened on the end cap body 10. 23b is independent of each other with through holes 11.
[0099] Preferably, the end cover body 10 and the second sealing staple 26b may also provide the fourth insulating pad 25b, the function of the fourth insulating pad 25b, and the third insulating pad 25a, in order to avoid repetition, it will not be described again.
[0100] In addition, to facilitate the placement of the fourth insulating pad 25b, the second sealing groove 24b adapted to the fourth insulating pad 25b can be provided on the end cap body 10 to accommodate the fourth insulating pad 25b, hold end cover. The flatness of the surface of the body 10.
[0101] Alternatively, the end cover body 10 is also provided with a second insulating pad 50, which is located on one side surface of the first insulative pad 30, which is located on one side surface of the first insulating pad 30. The second insulating pad 50 is provided with a notch 52 set corresponding to the second injection liquid hole 23b.
[0102] As described above, in the case where the second insulating pad 50 and the second injection hole 23b are provided on the end cover body 10, the arrangement of the notch 52 on the second insulating pad 50 is provided to avoid the presence of the second insulating pad 50. Interfering with the application of the second injection liquid hole 23b.
[0103] It should be noted that the second nicking liquid hole 23b is located in the projection of the notch 52 on the end cover body 10, by the above-described setting, when the nicknut needle is explored into the second injection liquid hole 23b, can avoid the liquid injection needle and Contact between the second insulating pad 50.
[0104] Optionally, a second insulating pad 50 is further provided on the end cover body 10, which is located on one side surface of the first insulating pad 30;
[0105] The projection of the shift piece 66 on the end cover body 10 is located in the projection of the second insulating pad 50 on the end cover body 10.
[0106] With the above setting to ensure that the second insulating pad 50 can completely partition the end cover body 10 and the shifting piece 66, avoid the battery short circuit between the end cap 3 and the shifting piece 66, to ensure the use of battery short circuits due to mutual contact. Safety.
[0107] Alternatively, an insulating tape 64 is provided between the battery outer cylinder 61 and the electrical core assembly 62, the shifting piece 66 located in the region of the insulating tape 64.
[0108] like Figure 11 and Figure 12 As shown, by the setting of the insulating tape 64, the split sheet 66 and the battery outer cylinder 61 are separated, and the battery is short-circuited between the adapter 66 and the battery outer cylinder 61, ensuring the battery. Use security.
[0109] It should be noted that the number of shifting sheets 66 is two, and the number of insulating tape 64 is also two, wherein one of the insulating tape 64 is located at one end of the electrical core assembly 62, and the other insulating tape 64 is located in the electrical core assembly. The other end of 62.
[0110] Exemplary, the battery outer cylinder 61 is a thin-walled structure having two ends, the insulating tape 64, can be attached to the inner wall of the battery outer cylinder 61, or both ends of the electrical core assembly 62.
[0111] The electrical core assembly 62 can be understood as a core of the hollow structure formed after the separator, the positive electrode sheet, and the negative electrode sheet, which is opposite to the polarity of the extremes of the end assembly 62.
[0112] like Figure 11 and Figure 12 As shown, the present application embodiment provides a method of making a lithium ion battery, the method comprising:
[0113] 301, get the top end cover 60, the bottom end cover 63, the electrical core assembly 62, and the battery outer cylinder 61;
[0114] 302, the battery core assembly 62 is loaded into the battery outer cylinder 61 and complete the electrical connection of the top end cover 60 and the end cap 62, and the bottom end cover 63 and the other end of the die assembly 62.
[0115] 303. The welding of the top end cover 60 at one end opening of the battery outer cylinder 61 is completed, and the welding of the bottom end cover 63 at the other end of the battery outer cylinder 61;
[0116] 304, injecting the electrolyte in the electrical core assembly 62;
[0117] 305. The top end cover 60 is sealed to obtain the lithium ion battery.
[0118] Exemplary, the process of obtaining the top end cap 60 can be:
[0119] like figure 1 and figure 2 As shown, the first insulating pad 30 is placed between the pole column 20 and the end cover body 10, and the first insulating pad 30 is located in the first loop 12, and then the pole column 20 and The end cover body 10 seals the connection through the first insulating pad 30.
[0120] In order to ensure the sealing effect, the first sealing glue and the second sealing glue can also be filled in the first stillad groove 40 and the second stillad groove 13.
[0121] Subsequently, the second insulating pad 50 is attached to the lower surface of the end cover body 10 (the first loop groove 12 on the upper surface of the end cap body 10), and the second insulating pad 50 and the end cap body are made by heating the pressurized manner. 10 fixed connection.
[0122] Finally, by laser welding, the shifting piece 66 is welded to the portion of the first through hole 11 to complete the electrical connection between the adapter 66 and the pole column 20.
[0123] like Figure 8 and Figure 9 As shown, the process of obtaining the bottom end cover 63 is substantially consistent with the process of obtaining the top end cap 60, and the difference is that the shifting piece 66 is passed through the portion of the first through hole 11 with the column portion 22 by laser welding. Welding to complete the electrical connection between the adapter 66 and the pole column 20.
[0124] Exemplary, the process of acquiring the battery module 62 can be:
[0125] The diaphragm, the negative electrode sheet and the positive electrode sheet are wound, and the battery core body is obtained. Subsequently, the extracorporeal is subjected to the extract of the extract of the battery body, and finally, the insulating film 64 is attached to the side of the battery body, and the insulation The film 64 is attached to the other side of the battery core, i.e., obtains the electrical core assembly 62.
[0126] Exemplary, the top end cap 60 is connected to the electrical end cover 63 through the backbound piece 66 and the electrical core assembly 62 by the shifting piece 66 with the other end of the electrical core assembly 62 by the tap 66 and the electrical end cap 66 (by laser welding). Ear electrical connection (by laser welding, etc.).
[0127] The sealing connection of the top end cover 60 and the end cover 60 and the bottom end cover 63 open to the other end of the battery outer cylinder 61 are then opened by laser welding, and the like.
[0128] Exemplary, the process of injection of the electrolytic solution in the electrical core assembly 62 may be: the electrolyte injects the electrolyte in the core assembly 62 in the core assembly 62 to be completed. The infiltration of the electrolyte in the electrical core assembly 62.
[0129] The process of sealing the top end cover 60 is obtained, and the process of obtaining the lithium ion battery can be: After the hydrating operation is completed, the battery outer cylinder 61 and the electrical core assembly 62 disposed in the battery outer cylinder 61 are chemically formed. After the step is completed, the first injection hole 23a is closed by the third insulating pad 25a, and the first sealing nail 26a is pressed on the third insulating pad 25a, and finally the first seal nail 26a is completed. Welding in the first sealing groove 24a.
[0130] What needs to be explained, if Figure 1 to 3 As shown, the disk portion 21 is opened, and the battery end cap having the first injection liquid hole 23a can be understood as the top end cover 60; Figure 5 to Figure 7 As shown, the end cover of the end cover body 10 is also understood to be a top end cover 60; Figure 8 to 10 As shown, the end cap of the end cap body 10 is provided with a battery end cap of the pressure relief through hole 2711 can be construed as the bottom end cover 63.
[0131] The embodiments of the present application will be described above with reference to the accompanying drawings, but the present application is not limited to the above-described specific embodiments, which are merely schematic, not limiting, and those skilled in the art Under the revelation of this application, many forms can be made in the case of the present application without departing from the scope of this application purpose and claims.
