CN217361807U - Integral structure of large-capacity battery - Google Patents
Integral structure of large-capacity battery Download PDFInfo
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- CN217361807U CN217361807U CN202123426733.6U CN202123426733U CN217361807U CN 217361807 U CN217361807 U CN 217361807U CN 202123426733 U CN202123426733 U CN 202123426733U CN 217361807 U CN217361807 U CN 217361807U
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Abstract
The utility model discloses an overall structure of large capacity battery belongs to the battery field, including the barrel, set up in the upper cover of barrel top, set up in electric core group, electrode connection piece and the current collection post in the barrel, the barrel is cylindrical withstand voltage barrel, cylindrical withstand voltage barrel pass through the flange with the upper cover is connected, the current collection post with upper cover sealing connection, on cover and be equipped with and let out the explosion mouth. The cylindrical pressure-resistant cylinder is made of aluminum or carbon steel, and an insulating anti-corrosion lining layer is arranged on the inner wall of the cylindrical pressure-resistant cylinder. The utility model improves the pressure resistance and the structural stability of the large-capacity battery, and can greatly reduce the production cost of the product; the design of the whole structure can ensure that when the thermal runaway of the battery occurs, the thermal runaway product can only be led out through the explosion venting port. The reliability, the safety and the service life of the high-capacity battery are improved.
Description
Technical Field
The utility model relates to a battery field especially relates to an overall structure of large capacity battery.
Background
The high-capacity lithium battery is one of the developing directions of the lithium battery, and can be applied to the fields of energy storage and power batteries. Compared with a small-capacity battery, the large-capacity battery saves a set of control device for each battery or battery pack, and actually, although the cost of a single battery of the large-capacity battery is increased, other related matched equipment is greatly reduced, so that the cost is reduced in general, and the market competition is facilitated.
The application of China to high-capacity energy storage batteries is at the beginning stage at present, and the production of high-capacity single batteries is restricted by a plurality of factors, including high requirements on production equipment, high requirements on product consistency, high product rejection rate, concentrated heat production in the application process, large heat release and the like.
CN113471579A discloses a high-capacity lithium ion battery, which includes a battery case, an upper cover disposed on the battery case, a battery cell group disposed in the case, and a current collecting column connected to the battery cell group, wherein the current collecting column extends out of the upper cover. But it has the casing structure not stable enough, and the material cost of casing is higher, and the connected mode between casing and upper cover and the mass flow post is unstable, and the sealed effect of mass flow post and upper cover is not good, and the radiating effect of mass flow post is not good, the casing is easy to corrode scheduling problem.
CN213782140U discloses an environment-friendly lithium battery, which has a protective layer structure designed for the casing, but the protective layer is disposed outside the casing, so that the corrosion inside the casing cannot be avoided, and the effect of the selected anticorrosive material is insufficient.
CN109904360A discloses a heat-insulating flame-retardant battery module comprising: the battery pack comprises a closed battery box body, a battery pack and a plurality of layers of composite materials filled in the gap between the closed battery box body and the battery pack; the composite material is preferably three layers, the surface of the composite material can be made of stainless steel materials, the middle layer is a flame-retardant layer added with flame-retardant materials, the inner layer can be a heat-absorbing layer, and the outer layer can be a reinforcing layer. Although the flame-retardant layer is arranged between the box body and the battery pack, the selected flame-retardant materials are few in types and poor in effect.
Disclosure of Invention
To the above problem, the utility model provides an overall structure of large capacity battery, the technical scheme of adoption as follows:
the utility model provides an overall structure of large capacity battery, includes the barrel, set up in the upper cover of barrel top, set up in electric core group, electrode connection piece and the current collection post in the barrel, the barrel is cylindrical withstand voltage barrel, cylindrical withstand voltage barrel pass through the flange with the upper cover is connected, the current collection post with upper cover sealing connection, it leaks the mouth to cover to be equipped with.
Further limited, the material of the cylindrical pressure-resistant cylinder is aluminum or carbon steel.
Further limiting, the thickness of the cylindrical pressure-resistant cylinder body is 3-10 mm.
Further defined, the bottom of the cylindrical pressure-resistant cylinder body is provided with an inward concave structure.
Further limiting, the cylindrical pressure-resistant cylinder is made of carbon steel, and an insulating anti-corrosion lining layer is arranged on the inner wall of the cylindrical pressure-resistant cylinder.
Further limit, the material of insulating anticorrosive lining is at least one in polytetrafluoroethylene, polyethylene, polypropylene, polyester, PPR, insulating anticorrosive lining through brush coating, plastic-spraying, soak and mould, blow molding, hot melt at least one mode set up in cylindrical withstand voltage barrel inner wall.
Further, the position of the collecting column extending out of the upper cover is subjected to insulation sealing treatment.
Further, the upper cover is made of plastic.
Further, the connection mode of the upper cover and the cylindrical pressure-resistant cylinder body is welding or bonding.
Further, the sealing mode of the upper cover and the current collecting column is welding or bonding.
Further limit, the material of the upper cover is carbon steel or aluminum alloy.
Further, the upper cover and the cylindrical pressure-resistant cylinder are connected in a mode of one of bolt connection, riveting and welding.
Further, the sealing mode of the upper cover and the flow collecting column is injection molding.
Further prescribe a limit to, the withstand voltage barrel of cylindrical is provided with the strengthening rib along the withstand voltage barrel of cylindrical vertical direction, withstand voltage barrel of cylindrical outside is provided with the stirrup along the withstand voltage barrel horizontal direction of cylindrical.
Further limited, the core pack is a laminated core pack, and comprises at least one electric core, and the positive and negative electrode lugs of the core pack are positioned on the same side of the core pack and connected with the electrode connecting sheet.
Further inject, the electrode connection piece is the zigzag connection piece, the zigzag connection piece with one side that the positive, negative pole ear of electric core group is connected is equipped with multiunit and leads to the groove, the positive, negative pole ear of electric core group pass lead to the groove and bend perpendicularly after weld in the one end of zigzag connection piece, the other end of zigzag connection piece is followed the side of electric core group is drawn forth and with the structure as an organic whole is welded to the collection flow post.
Further limiting, at least one hole is formed in the current collecting column, the bottom of the hole is not communicated with the interior of the battery, a soaking device is arranged in the hole, and the soaking device is a heat pipe or a heat radiator.
Further limiting, a temperature control device connected with the soaking device is arranged on the outer side of the upper cover, and the temperature control device is a circulating liquid cooling device or a semiconductor cooling device.
Further limiting, a gap between the electric core group and the cylindrical pressure-resistant cylinder body is filled with a flame-retardant temperature-resistant material.
Further limited, the flame-retardant temperature-resistant material is at least one of polyvinyl chloride and polypropylene.
Further limiting, a thickening layer is arranged at the position, extending out of the upper cover, of the flow collecting column, the thickening layer is consistent with the appearance of the flow collecting column, the cross section of the thickening layer is of a rectangular structure, a plurality of grooves are formed in the thickening layer, and the thickening layer and the flow collecting column are cast into an integral structure through insulating rubber.
Further, at least one bracket or handle is arranged outside the cylindrical pressure-resistant cylinder body.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model discloses an overall structure of large capacity battery, including the barrel, set up in the upper cover of barrel top, set up electric core group, electrode connection piece and the mass flow post in the barrel, the barrel is cylindrical withstand voltage barrel, and cylindrical withstand voltage barrel passes through the flange to be connected with the upper cover, and mass flow post and upper cover sealing connection cover on and are equipped with and let out the explosion mouth. According to the technical scheme, the cylindrical pressure-resistant cylinder body is adopted, so that the pressure resistance and the structural stability of the high-capacity battery are improved; the design of the whole structure can ensure that when the thermal runaway of the battery occurs, the thermal runaway product can only be led out through the explosion venting port.
2. The cylindrical pressure-resistant cylinder body of the utility model is made of aluminum or carbon steel, on one hand, has stronger pressure resistance and stable structure; on the other hand, the production cost of the product can be greatly reduced.
3. The utility model discloses a have anticorrosive coating on the withstand voltage barrel inner wall of cylinder, anticorrosive lining's material is at least one kind in polytetrafluoroethylene, polyethylene, polypropylene, polyester, the PPR, and anticorrosive lining sets up and the withstand voltage barrel inner wall of cylinder through brushing, spraying plastics, soaking at least one kind mode in the plastics, blowing, the hot melt. The anti-corrosion coating has insulation and anti-corrosion properties, and the reliability, safety and service life of the high-capacity battery are improved by arranging the anti-corrosion coating.
4. Through changing the material of upper cover, barrel and the sealed mode between upper cover, barrel, the mass flow post, strengthened the joint seal effect, improved battery structure's security and stability by a wide margin, saved manufacturing cost simultaneously.
5. The utility model discloses an inside or outside vertical direction of following of cylindrical withstand voltage barrel all can set up the strengthening rib, and cylindrical withstand voltage barrel is outside to be provided with the stirrup along the horizontal direction. Through setting up strengthening rib and stirrup, greatly improved the resistance to pressure and the structural stability of cylindrical withstand voltage barrel, difficult emergence deformation.
6. The utility model discloses a utmost point ear of cell group passes through the electrode connection piece with the mass flow post and is connected, and the electrode connection piece is the zigzag connection piece, and is equipped with multiunit logical groove with the cell group just, one side that the negative pole ear is connected, and the cell group just, the negative pole ear passes logical groove and welds in the one end of zigzag connection piece after bending perpendicularly, and the other end is drawn forth and is flowed post welding structure as an organic whole from the side of cell group. The lug of the electric core group is connected with the current collecting column through the Z-shaped connecting sheet, so that the current carrying area between the electric core group and the current collecting column is increased, and the current carrying capacity is increased; meanwhile, the connection process between the tab and the current collecting column is simplified.
7. The utility model discloses a be equipped with at least one hole in the mass flow post, the bottom in hole does not communicate with each other with the battery is inside, is equipped with soaking device in the hole, covers on and is provided with the temperature control device who is connected with soaking device. The soaking device is arranged in the hole in the flow collecting column, so that the heat of the flow collecting column can be timely and efficiently dissipated; meanwhile, the space is greatly saved, and the energy density is improved.
8. The utility model discloses a space between electric core group and the cylindrical withstand voltage barrel is filled there is fire-retardant temperature resistant material, can effectively utilize cylindrical withstand voltage barrel inner space to reach control electric core group temperature, prevent that electric core group from taking place the effect of thermal runaway.
9. The utility model discloses a thickness of upper cover is greater than the thickness of cylindrical withstand voltage barrel, and cylindrical withstand voltage barrel upper portion is equipped with the flange, and the connected mode between cylindrical withstand voltage barrel and the upper cover is bolted connection or rivet connection, has made things convenient for whole battery structure's fixed and connection, makes battery overall structure stable.
10. The utility model discloses a mass flow post stretches out upper cover department and is provided with the thickening layer, and the thickening layer is unanimous with the mass flow post appearance, and the cross-section is the rectangle structure, and the thickening layer is inside to be equipped with the multichannel recess, by insulating rubber pouring structure as an organic whole between thickening layer and the mass flow post, has improved the insulating sealed effect of upper cover and mass flow post, has greatly strengthened large capacity battery's reliability and security.
11. The utility model discloses a covering upward and being provided with and letting out and explode the mouth, when the battery takes place the thermal runaway, can in time let out the combustible substance in the cylindrical withstand voltage barrel, ensure the security of battery.
12. The utility model discloses a cylindrical withstand voltage barrel outside is provided with at least one support or handle, the equipment of the large capacity battery of being convenient for, fixed and removal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the cylindrical large-capacity battery of the present invention;
fig. 2 is a schematic diagram of the whole internal structure of the battery cell of the present invention;
fig. 3 is a schematic view of the connection structure of the positive and negative electrode tabs and the positive and negative electrode connecting pieces of the battery cell of the present invention;
FIG. 4 is a schematic view of the structure of the positive and negative connecting sheets of the present invention;
fig. 5 is a schematic structural view of the cylindrical pressure-resistant cylinder of the present invention;
fig. 6 is a schematic view of the structure of the upper cover of the present invention.
Wherein, 1, the cylindrical pressure-resistant cylinder body; 2-negative current collecting column; 3-temperature control device; 4, venting the explosion port; 5, a soaking device; 6-positive current collecting column; 7, a bracket; 8, flame-retardant temperature-resistant material; 9-negative pole connecting piece; 9-1-negative pole connecting pole ear end; 9-2, connecting the negative electrode with the negative current collecting column end; 9-3-negative through groove; 10-positive connecting piece; 10-1-positive pole connecting with the pole lug end; 10-2, connecting the positive electrode with the positive current collecting column end; 10-3-positive through groove; 11-positive electrode tab; 12-a negative electrode tab; 13-stirrup; 14-reinforcing ribs; 15-insulating anticorrosion liner; 16-an electric core group; 17-upper cover; 18-negative thickening layer; 19-positive thickening layer; 20-thickening layer groove.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It should be understood that directional terms such as "upper" and "lower" are used herein in accordance with the accompanying drawings for better understanding of the technical aspects of the present invention.
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific examples, but the present invention is not limited to the embodiments described below.
The utility model discloses an overall structure of large capacity battery, including the barrel, set up in the upper cover 17 of barrel top, set up electric core group 16, electrode connection piece 9/10 and the current collection post 2/6 in the barrel, the barrel is cylindrical withstand voltage barrel 1, and cylindrical withstand voltage barrel 1 passes through the flange to be connected with upper cover 17, and current collection post 2/6 and upper cover 17 sealing connection are equipped with on the upper cover 17 and let out and explode mouthful 4. The material of the cylindrical pressure-resistant cylinder body 1 is aluminum or carbon steel. The thickness of the cylindrical pressure-resistant cylinder body 1 is 3-10 mm. The bottom of the cylindrical pressure-resistant cylinder 1 has an inward concave structure. The material of the cylindrical pressure-resistant cylinder body 1 is carbon steel, and the inner wall of the carbon steel cylindrical pressure-resistant cylinder body 1 is provided with an insulating anticorrosive lining 15. The insulating anticorrosive lining 15 is made of at least one of polytetrafluoroethylene, polyethylene, polypropylene, polyester and PPR, and the insulating anticorrosive lining 15 is arranged on the inner wall of the cylindrical pressure-resistant cylinder body 1 in at least one mode of brushing, spraying, dipping, blowing and hot melting. The current collecting column 2/6 extends out of the upper cover 17 for insulation sealing treatment. The upper cover 17 is made of plastic. The connection mode of the upper cover 17 and the cylindrical pressure-resistant cylinder 1 is welding or bonding. The sealing mode of the upper cover 17 and the current collecting column 2/6 is welding or bonding. The upper cover 17 is made of carbon steel or aluminum alloy. The connection mode of the upper cover 17 and the cylindrical pressure-resistant cylinder body 1 is one of bolt connection, riveting and welding. The sealing mode of the upper cover 17 and the current collecting column 2/6 is injection molding. The cylindrical pressure-resistant cylinder 1 is provided with a reinforcing rib 14 along the vertical direction, and the outside of the cylindrical pressure-resistant cylinder 1 is provided with a stirrup 13 along the horizontal direction. The electric core group 16 is a laminated electric core group, and comprises at least one electric core, and the positive and negative electrode ears 11/12 of the electric core group 16 are positioned on the same side of the electric core group 16 and are connected with the electrode connecting sheet 9/10. The electrode connecting sheet 9/10 is a Z-shaped connecting sheet, one side of the Z-shaped connecting sheet, which is connected with the positive electrode lug and the negative electrode lug of the electric core group 16, is provided with a plurality of groups of through grooves 9-3/10-3, the positive electrode lug and the negative electrode lug of the electric core group 16 penetrate through the through grooves and are vertically bent and then welded at one end of the Z-shaped connecting sheet, and the other end of the Z-shaped connecting sheet is led out from the side surface of the electric core group 16 and is welded with the current collecting column 2/6 to form an integrated structure. At least one hole is arranged in the current collecting column 2/6, the bottom of the hole is not communicated with the inside of the battery, a soaking device 5 is arranged in the hole, and the soaking device 5 is a heat pipe or a heat radiator. The outer side of the upper cover 17 is provided with a temperature control device 3 connected with the soaking device 5, and the temperature control device 3 is a circulating liquid cooling device or a semiconductor cooling device. The gap between the electric core group 16 and the cylindrical pressure-resistant cylinder body 1 is filled with flame-retardant temperature-resistant material 8. The flame-retardant temperature-resistant material 8 is at least one of polyvinyl chloride and polypropylene. The position of the flow collecting column 2/6 extending out of the upper cover 17 is provided with a thickening layer 18/19, the thickening layer 18/19 is consistent with the appearance of the flow collecting column 2/6, the cross section of the thickening layer is of a rectangular structure, a plurality of grooves 20 are arranged inside the thickening layer 18/19, and the thickening layer 18/19 and the flow collecting column 2/6 are cast into a whole by insulating rubber. At least one holder 7 or handle is arranged outside the cylindrical pressure vessel 1.
Example 1
Referring to fig. 1-3, this embodiment shows an overall structure of a large-capacity battery, which includes a cylindrical casing, an upper cover 17 disposed above the cylindrical casing, a current core group 16 disposed in the cylindrical casing, an electrode connecting sheet 9/10, and a current collecting column 2/6, where the cylindrical casing is a cylindrical pressure-resistant cylindrical casing 1, the cylindrical pressure-resistant cylindrical casing 1 is connected to the upper cover 17 through a flange, the current collecting column 2/6 is sealed with the upper cover 17 through injection molding, and the upper cover 17 is provided with an explosion venting port 4. The positive and negative tabs 11/12 of the battery pack 16 are located on the same side of the battery pack 16, and one end of the electrode connecting piece 9/10 is welded with the tab 11/12 of the battery pack 16, and the other end is welded with the current collecting post 2/6.
Preferably, the material of the cylindrical pressure-resistant cylinder 1 is aluminum or carbon steel.
Preferably, the thickness of the cylindrical pressure-resistant cylinder 1 is 5 mm.
Preferably, the bottom of the cylindrical pressure-resistant cylinder 1 has an inward concave structure.
Preferably, the cylindrical pressure-resistant cylinder 1 is provided with a reinforcing rib 14 in the vertical direction and a stirrup 13 in the horizontal direction.
It should be noted that, by the above technical scheme, on one hand, the overall structure of the battery has strong pressure resistance, is stable in structure, is not easy to deform, and improves the pressure resistance and the structural stability of the large-capacity battery; on the other hand, the material is selected from aluminum or carbon steel, so that the production cost of the product can be greatly reduced. The design of the whole structure can ensure that when the battery is out of control thermally, the thermal runaway product can only be led out through the explosion venting port, and the safety performance of the battery is improved.
Example 2
Referring to fig. 1-4, this embodiment shows an overall structure of a large-capacity battery, based on embodiment 1, a positive tab 11 and a negative tab 12 of a laminated core pack 16 are both located on one side of the core pack 16, the positive tab 11 passes through a positive through slot 10-3 of a positive connection tab 10 and a positive tab end 10-1, and is vertically bent at the upper part of the through slot 10-3, the vertically bent part of the positive tab 11 is welded with the positive tab end 10-1 of the positive connection tab 10 by laser welding, and a positive current collecting post end 10-2 of the positive connection tab 10 is welded with a positive current collecting post 6. Similarly, the negative pole tab 12 passes through the negative pole through slot 9-3 of the negative pole connecting tab end 9-1 of the negative pole connecting tab 9 and is vertically bent at the upper part of the through slot 9-3, the vertically bent part of the negative pole tab 12 is welded with the tab end 9-1 of the negative pole connecting tab 9 by adopting a laser welding mode, and the negative pole collecting post end 9-2 of the negative pole connecting tab 9 is welded with the negative pole collecting post 2.
The positive electrode connection piece 10 and the negative electrode connection piece 9 have a zigzag structure as shown in fig. 4. The tab 11/12 of the electric core group 16 is connected with the current collecting column 2/6 through a Z-shaped connecting sheet, so that the current carrying area between the electric core group 16 and the current collecting column 2/6 is increased, and the current carrying capacity is increased; and simultaneously, the connection process between the tab 11/12 and the current collecting column 2/6 is simplified.
Example 3
Referring to fig. 1 to 5, this embodiment shows an overall structure of a large capacity battery, and based on embodiment 2, the thickness of a cylindrical pressure-resistant cylinder 1 is 3mm, and the material is carbon steel. The inner wall of the cylinder body is provided with an insulating anticorrosive lining layer 15, the insulating anticorrosive lining layer 15 is made of polytetrafluoroethylene, and the insulating anticorrosive lining layer 15 is arranged on the inner wall of the cylindrical pressure-resistant cylinder body 1 in a brushing mode.
It should be noted that the insulating anticorrosion liner 15 may also be made of at least one of polyethylene, polypropylene, polyester, and PPR, so that the reliability, safety, and service life of the large-capacity battery may be improved. The insulating anticorrosive lining 15 can also be arranged on the inner wall of the cylindrical pressure-resistant cylinder body 1 in at least one mode of plastic spraying, plastic dipping, blow molding and hot melting, and the insulating anticorrosive lining 15 can be more stable and firm and is not easy to fall off in the above mode.
Example 4
Referring to fig. 1 to 6, this embodiment shows an overall structure of a large capacity battery, in which the thickness of a cylindrical pressure-resistant can 1 is 10mm based on embodiment 3, and a current collecting column 2/6 is protruded from an upper lid 17 to perform an insulating sealing treatment. The upper cover 17 is made of plastic, the connection mode of the upper cover 17 and the cylindrical pressure-resistant cylinder 1 is welding, and the sealing mode of the upper cover 17 and the collecting column 2/6 is welding.
It should be noted that the connection mode of the upper cover 17 and the cylindrical pressure-resistant cylinder 1 may also be bonding, and the sealing mode of the upper cover 17 and the current collecting column 2/6 may also be bonding.
Example 5
Referring to fig. 1 to 6, this embodiment shows an overall structure of a large capacity battery, in which the thickness of a cylindrical pressure-resistant can 1 is 8mm, and the current collecting pole is protruded from an upper cap 17 to perform an insulating sealing treatment, based on embodiment 4. The upper cover 17 is made of carbon steel, the upper cover 17 is connected with the cylindrical pressure-resistant cylinder 1 through bolts, and the upper cover 17 and the flow collecting column 2/6 are sealed through injection molding.
It should be noted that the connection mode of the upper cover 17 and the cylindrical pressure-resistant cylinder 1 can also be riveting or welding, and the connection mode in this embodiment facilitates the fixation and connection of the whole battery structure, can enhance the stability of the whole battery structure, and achieves a good sealing effect.
Example 6
Referring to fig. 1 to 6, this embodiment shows an overall structure of a large-capacity battery, and based on embodiment 4, at least one hole is provided in the current collecting column 2/6, the bottom of the hole is not communicated with the inside of the battery, a soaking device 5 is provided in the hole, and the soaking device 5 is a heat pipe.
It should be noted that, by arranging the heat pipe in the hole in the flow collecting column, the heat of the flow collecting column can be dissipated timely and efficiently; meanwhile, the space is greatly saved, and the energy density is improved.
Preferably, a temperature control device 3 connected with the soaking device 5 is arranged outside the upper cover 17, and the temperature control device 3 is a semiconductor refrigerating device.
It should be noted that the temperature control device 3 may also be a circulating liquid cooling device, and by providing the temperature control device, the heat dissipation effect can be further enhanced, and the heat balance of the battery can be maintained.
Example 7
Referring to fig. 1-6, this embodiment shows an overall structure of a large-capacity battery, in example 5, a gap between an electric core set 16 and a cylindrical pressure-resistant cylinder 1 is filled with a flame-retardant temperature-resistant material 8, and the flame-retardant temperature-resistant material 8 is polyvinyl chloride.
It should be noted that the flame-retardant temperature-resistant material 8 may also be polypropylene or a mixture of polyvinyl chloride and polypropylene, and the internal space of the cylindrical pressure-resistant cylinder 1 can be effectively utilized to achieve the effects of controlling the temperature of the electric core assembly 16 and preventing the electric core assembly 16 from thermal runaway.
Example 8
Referring to fig. 1-6, this embodiment shows an overall structure of a large-capacity battery, based on embodiment 6, a thickening layer 18/19 is disposed at a position where a current collecting column 2/6 extends out of an upper cover 17, the thickening layer 18/19 is identical to the current collecting column 2/6 in shape, the cross section of the thickening layer is a rectangular structure, a plurality of grooves 20 are disposed inside the thickening layer 18/19, and an integrated structure is formed by casting insulating rubber between the thickening layer 18/19 and the current collecting column 2/6.
It should be noted that, the above technical solution improves the effect of insulating and sealing the upper cover 17 and the current collecting column 2/6, and greatly enhances the reliability and safety of the large-capacity battery.
Preferably, the cylindrical pressure-resistant cylinder 1 is externally provided with a holder 7 or a handle or both a holder 7 and a handle.
It should be noted that, the number of the supports or the handles arranged outside the cylindrical pressure-resistant cylinder 1 may be one or more, which is convenient for assembling, fixing and moving the large-capacity battery.
The foregoing is a further detailed description of the invention with reference to specific preferred embodiments and is not intended to limit the invention, to the extent that certain modifications or alterations may be made without departing from the spirit of the invention, any such modifications, equivalents, improvements, etc. as fall within the spirit and principles of the invention as defined by the appended claims.
Claims (22)
1. The utility model provides an overall structure of large capacity battery, includes the barrel, set up in the upper cover of barrel top, set up in electric core group, electrode connection piece and the current collection post in the barrel, its characterized in that, the barrel is cylindrical withstand voltage barrel, cylindrical withstand voltage barrel pass through the flange with the upper cover is connected, the current collection post with upper cover sealing connection, it explodes the mouth to cover to be equipped with to let out.
2. The overall structure of a large capacity battery as claimed in claim 1, wherein the material of the cylindrical pressure-resistant can is aluminum or carbon steel.
3. The overall structure of a large capacity battery as claimed in claim 2, wherein the thickness of the cylindrical pressure-resistant can is 3 to 10 mm.
4. The unitary structure of a large capacity battery as claimed in claim 1, wherein the cylindrical pressure-resistant can bottom has an inward concave structure.
5. The overall structure of a large-capacity battery as claimed in claim 2, wherein the cylindrical pressure-resistant cylinder is made of carbon steel, and an insulating and corrosion-resistant lining is provided on the inner wall of the cylindrical pressure-resistant cylinder made of carbon steel.
6. The integral structure of the large-capacity battery according to claim 5, wherein the insulating anticorrosive lining is made of one of polytetrafluoroethylene, polyethylene, polypropylene, polyester and PPR, and is arranged on the inner wall of the cylindrical pressure-resistant cylinder in at least one of brushing, spraying, dipping, blow molding and hot melting.
7. The integrated structure of a large capacity battery as set forth in claim 1, wherein the current collecting pillars are hermetically sealed at the positions where they protrude from the upper cap.
8. The overall structure of a large capacity battery as set forth in claim 1, wherein the upper cover is made of plastic.
9. The integrated structure of a large capacity battery as claimed in claim 8, wherein the connection of the upper cap to the cylindrical pressure-resistant cylinder is welding or bonding.
10. The integrated structure of large capacity batteries according to claim 8, wherein the sealing means of the upper cap to the current collecting column is welding or bonding.
11. The overall structure of a large capacity battery as set forth in claim 1, wherein the upper cover is made of carbon steel or aluminum alloy.
12. The integrated structure of a large capacity battery as recited in claim 11, wherein the upper cover is connected to the cylindrical pressure-resistant can by one of bolting, riveting and welding.
13. The integrated structure of a large capacity battery as set forth in claim 11, wherein the sealing means of the upper cap with the current collecting post is injection molding.
14. The integrated structure of a large-capacity battery according to claim 1, wherein the cylindrical pressure-resistant can body is provided with reinforcing ribs in a vertical direction of the cylindrical pressure-resistant can body, and an outer portion of the cylindrical pressure-resistant can body is provided with stirrups in a horizontal direction of the cylindrical pressure-resistant can body.
15. The overall structure of a large-capacity battery according to claim 1, wherein the core pack is a laminated core pack comprising at least one electric core, and the positive and negative electrode tabs of the core pack are located on the same side of the core pack and connected to the electrode connecting sheet.
16. The integral structure of a large-capacity battery according to claim 1, wherein the electrode connecting sheet is a zigzag connecting sheet, one side of the zigzag connecting sheet connected with the positive and negative electrode lugs of the battery cell group is provided with a plurality of groups of through grooves, the positive and negative electrode lugs of the battery cell group pass through the through grooves and are perpendicularly bent and then welded at one end of the zigzag connecting sheet, and the other end of the zigzag connecting sheet is led out from the side surface of the battery cell group and is welded with the current collecting column into an integral structure.
17. An integral structure of a large capacity battery as defined in claim 1, wherein at least one hole is formed in said current-collecting column, the bottom of said hole is not communicated with the inside of the battery, and a soaking device is formed in said hole, said soaking device being a heat pipe or a heat bar.
18. The overall structure of a large-capacity battery as claimed in claim 17, wherein a temperature control device connected to the soaking device is provided outside the upper cover, and the temperature control device is a circulating liquid cooling device or a semiconductor cooling device.
19. The overall structure of a large capacity battery as claimed in claim 1, wherein a gap between the electric core pack and the cylindrical pressure-resistant cylinder is filled with a flame-retardant temperature-resistant material.
20. The overall structure of a large capacity battery as claimed in claim 19, wherein the flame-retardant temperature-resistant material is one of polyvinyl chloride and polypropylene.
21. The integral structure of a large-capacity battery as recited in claim 1, wherein a thickening layer is arranged at the position where the flow collecting column extends out of the upper cover, the thickening layer and the flow collecting column are consistent in appearance, the cross section of the thickening layer is of a rectangular structure, a plurality of grooves are formed in the thickening layer, and the thickening layer and the flow collecting column are cast into a whole through insulating rubber.
22. The unitary structure of a large capacity battery as claimed in claim 1, wherein the cylindrical pressure-resistant cylinder is externally provided with at least one bracket or handle.
Priority Applications (1)
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