CN215070164U - A block subassembly and cylinder battery for cylinder battery - Google Patents
A block subassembly and cylinder battery for cylinder battery Download PDFInfo
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- CN215070164U CN215070164U CN202121480412.1U CN202121480412U CN215070164U CN 215070164 U CN215070164 U CN 215070164U CN 202121480412 U CN202121480412 U CN 202121480412U CN 215070164 U CN215070164 U CN 215070164U
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- pole
- cylindrical battery
- cover plate
- cap assembly
- current collecting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a block subassembly and cylinder battery for the block subassembly of cylinder battery includes: the flow collecting disc is provided with a through hole penetrating through the flow collecting disc; the pole column is connected with the current collecting disc, the first end of the pole column is fixed in the through hole, the first end of the pole column is provided with an electric connection part, and at least part of the electric connection part is exposed out of the through hole to be abutted against a pole lug of a pole core of the cylindrical battery; the cover plate is positioned on one side of the current collecting disc and sleeved on the pole, and the cover plate is used for sealing the opening of the shell of the cylindrical battery. From this, through setting up electric connection portion for at least partly expose in the through-hole and with the utmost point ear butt of cylindrical battery, can make utmost point post and cylindrical battery's utmost point ear lug direct connection, can shorten the return circuit of electric current, can reduce cylindrical battery internal resistance to can strengthen cylindrical battery's the ability of overflowing, and then be favorable to promoting cylindrical battery's heavy current charge-discharge performance.
Description
Technical Field
The utility model belongs to the technical field of the battery and specifically relates to a cylinder battery that is used for block subassembly of cylinder battery and has this block subassembly for cylinder battery is related to.
Background
In the correlation technique, the utmost point post on the block of cylinder battery passes through the current collecting disc and is connected with the utmost point ear of utmost point core to utmost point post wears to locate the through-hole of current collecting disc, and the region that is located the through-hole outside and is close to the edge of current collecting disc welds with the utmost point ear of utmost point core, and this kind of connected mode can lead to the return circuit of electric current longer, can increase cylinder battery internal resistance, thereby can make cylinder battery's the ability of overflowing weaker, is unfavorable for promoting cylinder battery's heavy current charge-discharge performance.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a block subassembly for cylinder battery, this block subassembly for cylinder battery can strengthen the ability of overflowing of cylinder battery, is favorable to promoting the heavy current charge-discharge performance of cylinder battery.
The utility model discloses a cylinder battery is further provided.
According to the utility model discloses a block subassembly for cylinder battery includes: the flow collecting disc is provided with a through hole penetrating through the flow collecting disc; the pole column is connected with the current collecting disc, the first end of the pole column is fixed in the through hole, the first end of the pole column is provided with an electric connection part, and at least part of the electric connection part is exposed out of the through hole to be abutted against a pole lug of a pole core of the cylindrical battery; the cover plate is positioned on one side of the current collecting disc and sleeved on the pole, and the cover plate is used for sealing an opening of the shell of the cylindrical battery.
According to the utility model discloses a block subassembly for cylinder battery through set up the electricity connecting portion for at least part expose in the through-hole and with the utmost point ear butt of cylinder battery, can make utmost point post and the utmost point ear lug of cylinder battery, can shorten the return circuit of electric current, can reduce the cylinder battery internal resistance to can strengthen the ability of overflowing of cylinder battery, and then be favorable to promoting the heavy current charge-discharge performance of cylinder battery.
In some examples of the invention, the electrical connection protrudes from a surface of the current collecting plate facing away from one side of the cover plate.
In some examples of the present invention, the electrical connection portion is a plurality of electrical connection portions, and the electrical connection portions are arranged around the axis of the pole at intervals in order.
In some examples of the invention, the outer diameter of the current collecting disc is a1The outer diameter of the cover plate is A2And satisfies the relation: a is more than or equal to 8mm1-A2。
In some examples of the present invention, the cap assembly further comprises: the support piece is sleeved on the pole and supported between the current collecting disc and the cover plate, the cover plate is provided with a first limiting part, and the support piece is provided with a second limiting part in limiting fit with the first limiting part.
In some examples of the present invention, the first locating part is one of a limiting groove and a limiting boss, the second locating part is the other of the limiting groove and the limiting boss, and the limiting boss is installed in the limiting groove.
The utility model discloses an in some examples, the block subassembly is still located including the cover sealing washer on the utmost point post, the perisporium of utmost point post is equipped with the arch, the arch is located the inboard of apron just support locate the first side of current collecting disc, the sealing washer clamp is located the apron with between the arch.
In some examples of the present invention, the cap assembly further includes an insulating sleeve disposed on the post, the peripheral wall of the post is provided with a protrusion, the protrusion is located outside the cover plate, and the insulating sleeve is sandwiched between the cover plate and the protrusion.
The utility model discloses an in some examples, support piece is equipped with dodges the hole, the current collection dish is equipped with utmost point ear weld zone, dodge the hole with utmost point ear weld zone corresponds.
According to the utility model discloses a cylindrical battery, include: a housing provided with an opening; the pole core is arranged in the shell; the cap assembly is the cap assembly for the cylindrical battery, and the cap assembly is used for closing the opening.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is an exploded schematic view of a cap assembly according to an embodiment of the present invention;
fig. 2 is a schematic view of the cap assembly according to an embodiment of the present invention after assembly (deformation of the post due to force application);
fig. 3 is a schematic view of a cap assembly according to an embodiment of the present invention before assembly (with the post not deformed);
fig. 4 is another schematic view of the cap assembly after assembly according to an embodiment of the present invention;
FIG. 5 is a schematic view of a cap assembly according to an embodiment of the present invention without a pour hole;
fig. 6 is a schematic view of another angle of the cap assembly according to an embodiment of the present invention;
fig. 7 is a schematic view of another embodiment of a cap assembly according to an embodiment of the present invention;
fig. 8 is a schematic view of a pole according to an embodiment of the present invention;
fig. 9 is a schematic view of another angle of a pole according to an embodiment of the present invention;
fig. 10 is a schematic view of a cover plate according to an embodiment of the invention;
fig. 11 is a schematic view of a partial structure of a cylindrical battery according to an embodiment of the present invention.
Reference numerals:
a cap assembly 100; a cylindrical battery 200; 1, a tab; a housing 2; a pole core 3;
a pole 10; an electrical connection portion 11; a projection 12; a liquid injection hole 13; a connecting hole 14; a connection face 15; a projection 16;
a collector plate 20; a through hole 21; a tab welding area 22;
a cover plate 30; a first stopper 31; a stopper groove 32;
a support 40; a second stopper 41; a limit boss 42; relief holes 43;
a seal ring 50; a first body 51; a second body 52;
an insulating sleeve 60; a third body 61; a fourth body 62; and a mounting groove 63.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
A cap assembly 100 of a cylindrical battery 200 according to an embodiment of the present invention is described below with reference to fig. 1 to 11.
As shown in fig. 1 to 11, a cap assembly 100 according to an embodiment of the present invention includes: a current collecting disc 20, a pole 10 and a cover plate 30.
The current collecting disc 20 is provided with a through hole 21 penetrating through the current collecting disc 20, the through hole 21 penetrates through the current collecting disc 20 in the thickness direction of the current collecting disc 20, the pole 10 is connected with the current collecting disc 20, the first end of the pole 10 is fixed in the through hole 21, the first end of the pole 10 is provided with an electric connection portion 11, at least part of the electric connection portion 11 is exposed out of the through hole 21 to be abutted against a pole lug 1 of a pole core 3 of the cylindrical battery 200, the cover plate 30 is located on one side of the current collecting disc 20 and sleeved on the pole 10, and the cover plate 30 is used for sealing an opening of a shell 2 of the cylindrical battery 200.
The current collecting plate 20 is provided with a through hole 21, the through hole 21 is provided through the current collecting plate 20 in the height direction (i.e., the vertical direction shown in fig. 1) of the cap assembly 100, the pole 10 is provided in connection with the current collecting plate 20, and an electrical connection part 11 is arranged on the pole 10, specifically, the pole 10 has a first end and a second end which are oppositely arranged, the lower end of the pole 10 is the first end of the pole 10, the electrical connection part 11 is arranged at the first end of the pole 10, at least part of the electric connection part 11 is exposed out of the through hole 21 and is arranged in contact with the tab 1 of the pole core 3, the pole 10 is sleeved with a cover plate 30, the cap assembly 100 is disposed at a height direction of the cap assembly 30 above the current collecting plate 20, the cylindrical battery 200 has a case 2, the case 2 has an opening, the cap assembly 100 may be disposed at the opening, and the cap assembly 30 is used to close the opening of the case 2.
The cross section of the pole 10 (i.e. the cross section of the radial direction of the pole 10) may be circular, the circumferential wall of the pole 10 may be provided with a protrusion 12, the protrusion 12 and the pole 10 may be integrally formed, the current collecting disc 20 is provided with a through hole 21 penetrating through the current collecting disc 20, the through hole 21 may be formed by machining, the pole 10 may be connected with the current collecting disc 20, and, in the height direction of the cap assembly 100, the upper surface of the current collecting disc 20 may be in contact with the lower surface of the protrusion 12 in a stop manner, the first end of the pole 10 is provided with an electrical connection portion 11, at least part of the structure of the electrical connection portion 11 may be exposed out of the through hole 21, and the electrical connection portion 11 may be in contact with the tab 1 of the cylindrical battery 200 in a stop manner.
Among the prior art, utmost point post on the block of cylinder battery passes through the current collecting disc and is connected with the utmost point ear of utmost point core to utmost point post wears to locate the through-hole of current collecting disc, and the current collecting disc be located the through-hole outside and the regional utmost point ear welding with the utmost point core of neighbouring edge, and this kind of connected mode can lead to the return circuit of electric current longer, can increase cylinder battery internal resistance, thereby can make the cylindrical battery's the ability of overflowing weaker, is unfavorable for promoting the heavy current charge-discharge properties of cylindrical battery.
In the present application, the through hole 21 is formed in the current collecting plate 20, and at least a portion of the electrical connection portion 11 of the terminal 10 is exposed to the through hole 21, so as to abut against the tab 1 of the terminal core 3 of the cylindrical battery 200, and this arrangement can directly connect the terminal 10 with the tab 1 of the terminal core 3 of the cylindrical battery 200, thereby shortening the current loop, reducing the internal resistance of the cylindrical battery 200, enhancing the overcurrent capacity of the cylindrical battery 200, facilitating the improvement of the high-current charge-discharge performance of the cylindrical battery 200, and further ensuring the use reliability of the cylindrical battery 200. Moreover, by providing the protrusion 12 on the outer surface of the pole 10, the current collecting plate 20 can be prevented from moving in the height direction of the cap assembly 100, and the reliability of the cylindrical battery 200 can be further ensured.
From this, through setting up electric connection 11 as to expose partly at least in through-hole 21 and with the utmost point ear 1 butt of the utmost point core 3 of cylindrical battery 200, can make utmost point post 10 and the utmost point ear 1 lug direct connection of the utmost point core 3 of cylindrical battery 200, can shorten the return circuit of electric current, can reduce cylindrical battery 200 internal resistance to can strengthen cylindrical battery 200's the ability of overflowing, and then be favorable to promoting cylindrical battery 200's heavy current charge-discharge performance.
In some embodiments of the present invention, as shown in fig. 1-5, 8 and 9, the electrical connection portion 11 may protrude from a surface of the catch tray 20 on a side facing away from the cover plate 30 (i.e., a lower surface of the catch tray 20). It should be explained that, in the height direction (i.e. the up-down direction in fig. 2) of the cap assembly 100, the first end of the pole 10 may be provided with the electrical connection portion 11, and the electrical connection portion 11 may protrude from the lower surface of the current collecting plate 20, so that the electrical connection portion 11 may be embedded into the tab 1, and a reliable electrical connection may be formed between the electrical connection portion 11 and the tab 1.
It is understood that the tab 1 may be a flattened tab 1, and the flattened tab 1 has a certain elasticity, that is, the flattened tab 1 may be compressed, and by embedding the electrical connection portion 11 in the tab 1, the connection reliability between the electrical connection portion 11 and the tab 1 may be ensured, so that the loop of the current may be further shortened, and the internal resistance of the cylindrical battery 200 may be further reduced.
In some embodiments of the present invention, as shown in fig. 1 to 5, 8 and 9, the electrical connection portion 11 may be provided in a plurality, and the plurality of electrical connection portions 11 may be sequentially disposed at intervals around the axis of the pole 10.
Alternatively, the number of the electrical connection portions 11 may be six, six electrical connection portions 11 may be disposed at the first end of the pole post 10, and the six electrical connection portions 11 may be disposed at equal intervals in sequence around the axis of the pole post 10, and it is also understood that an included angle between every two adjacent electrical connection portions 11 may be 60 °, and it is emphasized that the number of the electrical connection portions 11 is not limited to six, and the number of the electrical connection portions 11 may be specifically selected according to actual needs, for example, the electrical connection portions 11 may also be located at four or eight positions. The overcurrent capacity of the cylindrical battery 200 can be further enhanced by the arrangement, so that the large-current charge and discharge performance of the cylindrical battery 200 can be improved.
In some embodiments of the present invention, as shown in fig. 1-7 and 10, the collecting disc 20 may have an outer diameter a1The cover plate 30 may have an outer diameter of A2The outer diameter of the collecting plate 20 and the outer diameter of the cover plate 30 may satisfy the relation: a is more than or equal to 8mm1-A2。
It should be noted that the pole post 10 may be sleeved with a cover plate 30, as shown in fig. 4, the cover plate 30 may be disposed above the current collecting plate 20 in the height direction of the cap assembly 100, and the central axis of the pole post 10, the central axis of the cover plate 30, the central axis of the current collecting plate 20, and the central axis of the through hole 21 of the current collecting plate 20 may be disposed in a collinear manner. The outer diameter of the collecting disc 20 can be understood as the diameter of the collecting disc 20, the outer diameter of the cover plate 30 can be understood as the diameter of the cover plate 30, the outer diameter of the collecting disc 20 is larger than the outer diameter of the cover plate 30, and the outer diameter of the collecting disc 20 is at least 8mm larger than the outer diameter of the cover plate 30. The arrangement can ensure that the welding area of the current collecting disc 20 and the lug 1 is not shielded by the cover plate 30, and the unilateral effective radial welding length of the current collecting disc 20 is not less than 4mm, so that the welding reliability of the current collecting disc 20 and the lug 1 can be ensured, and the large-current charging and discharging performance of the cylindrical battery 200 can be enhanced.
As some embodiments of the present invention, as shown in fig. 1 to 4, 8 and 9, the post 10 may be provided with a liquid injection hole 13 axially penetrating the post 10, an end of the liquid injection hole 13 far away from the electrical connection part 11 may be provided with a connection hole 14 communicating with the liquid injection hole 13, and an inner diameter of the connection hole 14 may beB1The inner diameter of the connection hole 14 may satisfy the relation: b is not less than 3mm1≤15mm。
It should be noted that the electrode post 10 may be provided with a liquid injection hole 13, the liquid injection hole 13 may be provided through the electrode post 10 in an axial direction (i.e., a vertical direction as shown in fig. 1) of the electrode post 10, the liquid injection hole 13 may be used for injecting an electrolyte into the cylindrical battery 200, and the liquid injection hole 13 may also be used for exhausting air during the manufacturing process of the cylindrical battery 200. The end of the pour hole 13 may be provided with a connection hole 14, and specifically, the end of the pour hole 13 remote from the electrical connection section 11 (i.e., the upper end of the pour hole 13) may be provided with a connection hole 14, the connection hole 14 may be provided in communication with the pour hole 13, and the connection hole 14 may have an inner diameter of B1，B1The value of (c) may be any value between 3mm and 15 mm. By mixing B1The value of (2) is set to any value between 3mm and 15mm, and the liquid injection hole 13 can be conveniently sealed through a sealing piece and other structures.
As some embodiments of the present invention, as shown in fig. 1 to 4, 8 and 9, the second end of the pole 10 opposite to the first end may be provided with an annular connecting surface 15, the connecting surface 15 may be disposed around the connecting hole 14, and the inner diameter of the connecting surface 15 may be B2The outer diameter of the connection surface 15 may be B3The inner diameter of the connection surface 15 and the outer diameter of the connection surface 15 may satisfy the relation: 2mm is less than or equal to 0.5B3-0.5B2≤20mm。
It should be noted that, as shown in fig. 4, the terminal post 10 has a first end and a second end opposite to each other, the second end of the terminal post 10 may be provided with a connection surface 15, the connection surface 15 may be used to weld a conductive member, and the conductive member may be used to connect two cylindrical batteries 200. Specifically, the connection surface 15 may be configured in an annular shape, the connection surface 15 may be disposed around the connection hole 14, and the inner diameter of the connection surface 15 may be B2The outer diameter of the connection surface 15 may be B3，B2And B3The relation can be satisfied: b is not less than 4mm3-B2Less than or equal to 40mm, so the subsequent assembly reliability of the cylindrical battery 200 can be further ensured.
As some embodiments of the present invention, the cap assembly 100 may further include: the sealing element, which may be mounted to the filling opening 13 and/or the connection opening 14, does not project beyond the connection surface 15 in the axial direction of the pole 10.
The packing may be attached to the pour hole 13, or the packing may be attached to the connection hole 14, or the packing may be attached to the pour hole 13 and the connection hole 14, and the packing is not exposed to the connection surface 15 in the height direction of the cap assembly 100. Alternatively, when the packing is mounted to the pouring hole 13 and the connecting hole 14, if the inner diameters of the connecting hole 14 and the pouring hole 13 are not equal, the lower surface of the packing may come into abutting contact with the bottom wall of the connecting hole 14. Alternatively, the sealing element can be designed as a sealing pin, which can be arranged in a welded manner in connection with the pole 10.
Alternatively, the seal may also be configured in the form of a rubber spike plus a sealing cap.
In some embodiments of the present invention, as shown in fig. 1-7, the cap assembly 100 may further include: the support member 40 may be sleeved on the pole post 10 and supported between the current collecting plate 20 and the cover plate 30, the cover plate 30 may be provided with a first limiting member 31, and the support member 40 may be provided with a second limiting member 41 in limiting fit with the first limiting member 31.
It should be noted that the pole post 10 may be sleeved with a supporting member 40, in the height direction of the cap assembly 100, the supporting member 40 may be disposed between the current collecting plate 20 and the cover plate 30, and at least a part of the structure of the lower surface of the supporting member 40 may be in abutting contact with at least a part of the structure of the upper surface of the current collecting plate 20. The pole post 10, the central axis of the cap plate 30, the central axis of the current collecting disk 20, the central axis of the through-hole 21, and the central axis of the support 40 may be arranged collinearly.
One end of the cover plate 30 close to the supporting member 40 may be provided with a first limiting member 31, one end of the supporting member 40 close to the cover plate 30 may be provided with a second limiting member 41, and the second limiting member 41 and the first limiting member 31 may cooperate to limit the supporting member 40. This arrangement fixes the support 40, and prevents the support 40 from rotating about its own central axis, thereby ensuring the reliability of use of the cap assembly 100.
In some embodiments of the present invention, the first limiting member 31 may be one of the limiting groove 32 and the limiting boss 42, the second limiting member 41 may be the other of the limiting groove 32 and the limiting boss 42, and the limiting boss 42 may be installed in the limiting groove 32. It should be noted that, when the first limiting member 31 is configured as the limiting groove 32, the second limiting member 41 may be configured as the limiting boss 42, and when the first limiting member 31 is configured as the limiting boss 42, the second limiting member 41 may be configured as the limiting groove 32. The limit projection 42 may be mounted in the limit groove 32 to limit fit with the limit groove 32.
As a specific example, as shown in fig. 2 to 5, one end of the cover plate 30 close to the supporting member 40 may be provided with a limiting groove 32, one end of the supporting member 40 close to the cover plate 30 may be provided with a limiting boss 42, and the limiting boss 42 may be installed in the limiting groove 32 to be in limiting fit with the limiting groove 32, so that the supporting member 40 may be reliably fixed, the supporting member 40 may be reliably prevented from rotating around its own axis, and thus the reliability of use of the cap assembly 100 may be ensured.
As some embodiments of the present invention, as shown in fig. 1 to fig. 5, the first limiting member 31 and the second limiting member 41 can be a plurality of, and the plurality of first limiting members 31 and the plurality of second limiting members 41 can be disposed in a one-to-one correspondence. It should be explained that the number of the first limiting members 31 may be configured as a plurality, the number of the second limiting members 41 may also be configured as a plurality, and the number of the first limiting members 31 is the same as the number of the second limiting members 41, and the plurality of first limiting members 31 and the plurality of second limiting members 41 may be disposed in a one-to-one correspondence manner.
For example, the number of the first limiting members 31 may be four, four first limiting members 31 may be sequentially arranged at intervals in the circumferential direction of the cover plate 30, and optionally, the angle between every two adjacent first limiting members 31 may be 90 °. When the number of the first limiting members 31 is four, the number of the second limiting members 41 can also be four, and the four second limiting members 41 can be arranged in one-to-one correspondence with the four first limiting members 31. This arrangement makes it possible to more reliably fix the support member 40, and more reliably prevent the support member 40 from rotating about its own central axis, so that the reliability of use of the cap assembly 100 can be further ensured.
In some embodiments of the present invention, as shown in fig. 1 to 5, the cap assembly 100 may further include a sealing ring 50 sleeved on the pole post 10, the circumferential wall of the pole post 10 may be provided with a protrusion 12, the protrusion 12 may be located inside the cover plate 30 and abut against the first side of the current collecting plate 20, and the sealing ring 50 may be sandwiched between the cover plate 30 and the protrusion 12.
It should be noted that the sealing ring 50 may be sleeved on the pole post 10, a protrusion 12 may be disposed on a peripheral wall of the pole post 10, the protrusion 12 may be located on an inner side of the cover plate 30, and the protrusion 12 may be abutted against a first side of the current collecting plate 20, where the first side of the current collecting plate 20 is a side of the current collecting plate 20 facing the cover plate 30, and the sealing ring 50 may be interposed between the cover plate 30 and the protrusion 12.
Alternatively, the sealing ring 50 may include a first body 51 and a second body 52, the second body 52 may be disposed above the first body 51, the first body 51 is sandwiched between the cover plate 30 and the protrusion 12, the second body 52 is sandwiched between the cover plate 30 and the pole post 10, a lower surface of the first body 51 may be in abutting contact with an upper surface of the protrusion 12, the first body 51 and the second body 52 may jointly define an installation space, and at least a part of the structure of the cover plate 30 may be disposed in the installation space. By providing the sealing ring 50, sealing between the post 10 and the cover plate 30 can be achieved, and the safety of use of the cap assembly 100 can be ensured.
In some embodiments of the present invention, as shown in fig. 1 to 5, the cap assembly 100 may further include an insulating sleeve 60 sleeved on the pole post 10, the circumferential wall of the pole post 10 may be provided with a protrusion 16, the protrusion 16 may be located outside the cover plate 30, and the insulating sleeve 60 may be sandwiched between the cover plate 30 and the protrusion 16.
It should be explained that the insulating sleeve 60 may be sleeved on the pole post 10, the insulating sleeve 60 may be disposed above the cover plate 30 in the height direction of the cap assembly 100, the protrusion 16 may be disposed on the peripheral wall of the pole post 10, the protrusion 16 may be located outside the cover plate 30, and the insulating sleeve 60 may be interposed between the cover plate 30 and the protrusion 16.
Alternatively, the insulating sleeve 60 may include a third body 61 and a fourth body 62, the fourth body 62 may be disposed above a circumferential edge of the third body 61, a lower surface of the third body 61 may be in abutting contact with an upper surface of the cover plate 30 and an upper surface of the sealing ring 50, and the third body 61 and the fourth body 62 may together define a mounting groove 63.
When the second end at utmost point post 10 applys pressure to utmost point post 10, the second end of utmost point post 10 can take place deformation and form bulge 16, and bulge 16 can stretch into mounting groove 63 in, and at this moment, bulge 16's lower surface can be stopped with the upper surface of third body 61 and is supported the contact. Through the arrangement of the insulating sleeve 60, insulation between the pole 10 and the cover plate 30 can be realized, so that the use safety of the cap assembly 100 can be further ensured.
In some embodiments of the present invention, as shown in fig. 1 to 5, the supporting member 40 may be provided with a avoiding hole 43, the current collecting plate 20 may be provided with a tab welding region 22, and the avoiding hole 43 may be provided corresponding to the tab welding region 22. It should be noted that the current collecting disk 20 may be welded to the tab 1 via the tab welding regions 22, alternatively, the number of the tab welding regions 22 may be plural, and a plurality of tab welding regions 22 may be sequentially disposed at intervals in the circumferential direction of the current collecting disk 20, for example, the number of the tab welding regions 22 may be four, and four tab welding regions 22 may be disposed at intervals in the circumferential direction of the current collecting disk 20.
The number of the avoiding holes 43 can be set to be multiple, optionally, the number of the avoiding holes 43 can be the same as the number of the tab welding areas 22, the multiple avoiding holes 43 and the multiple tab welding areas 22 can be arranged in a one-to-one correspondence manner, the avoiding holes 43 can avoid the tab welding areas 22, the overcurrent capacity of the cylindrical battery 200 can be further enhanced through the arrangement, and the large-current charging and discharging performance of the cylindrical battery 200 can be further improved.
Alternatively, as shown in fig. 2, when assembling the cap assembly 100, the pole post 10, the cover plate 30, the sealing ring 50 and the insulating sleeve 60 may be assembled together, after assembling the pole post 10, the cover plate 30, the sealing ring 50 and the insulating sleeve 60 together, pressure may be applied to the pole post 10 at the second end of the pole post 10 to deform the second end of the pole post 10 and form the protruding portion 16, and the protruding portion 16 may extend into the mounting groove 63, at this time, the pole post 10, the cover plate 30, the sealing ring 50 and the insulating sleeve 60 are all fixed together and cannot move, and then the current collecting disc 20 may be assembled, specifically, the current collecting disc 20 may be welded and fixed on the pole post 10 to complete the assembly of the cap assembly 100. Thus, the structure of the cap assembly 100 can be made reliable, the service life of the cap assembly 100 can be ensured, and the space utilization rate of the cylindrical battery 200 can be improved, so that the energy density of the cylindrical battery 200 can be improved.
Alternatively, when a force is applied to the pole post 10, the compression amount of the seal ring 50 may be controlled to be 20% to 40%, so that the sealing performance of the seal ring 50 may be improved, and the stability and the service life of the seal ring 50 may be improved.
Optionally, the terminal 10 may be an anode post 10 or a cathode post 10, if the terminal 10 is the anode post 10, the material of the terminal 10 may be aluminum or aluminum alloy, if the terminal 10 is the cathode post 10, the material of the terminal may be a copper-aluminum composite material, the material of the sealing ring 50 may be rubber or elastic plastic resistant to electrolyte, the material of the cover plate 30 may be aluminum alloy or steel, when the cylindrical battery 200 is assembled subsequently, the cap assembly 100 may be fixedly connected to the housing 2 of the cylindrical battery 200 through the cover plate 30, the material of the insulating sleeve 60 may be plastic having a certain strength and resistant to electrolyte, and the material of the support member 40 may be plastic having a certain strength and resistant to electrolyte; the current collecting plate 20 may be an anode current collecting plate 20 or an anode current collecting plate 20, and the material of the current collecting plate 20 may be aluminum or an aluminum alloy if the current collecting plate 20 is the anode current collecting plate 20, or may be copper or a copper alloy if the current collecting plate 20 is the anode current collecting plate 20.
Optionally, the central axes of the pole 10, the cover plate 30, the current collecting disc 20, the through hole 21 of the current collecting disc 20, the sealing ring 50, the insulating sleeve 60 and the support member 40 may be arranged in a collinear manner, so that the alignment property of the cap assembly 100 may be ensured, and the alignment property of the pole core 3 welded to the pole lug 1 by the current collecting disc 20 may be ensured, so that the axial and radial play of the pole core 3 in the housing 2 may be effectively limited, the eccentric contact of the pole core 3 in the housing 2 may be avoided, and the use reliability of the cylindrical battery 200 may be ensured.
As some embodiments of the present invention, as shown in fig. 5, the liquid injection hole 13 may not be formed on the terminal post 10, and the size of the terminal post 10 can be effectively reduced by such a configuration, so that the cylindrical battery 200 with insufficient radial space for adapting the terminal post 10 can be obtained.
As some embodiments of the present invention, as shown in fig. 7, the cross section of the terminal post 10 (i.e. the cross section of the terminal post 10 in the radial direction) may be an oblong, and for "oblong", it may be understood as replacing two short sides of the rectangle with a shape structure after an arc, so the area of the connecting surface 15 may be increased, which is beneficial to ensuring the reliability of the subsequent assembly of the cylindrical battery 200.
According to the utility model discloses cylindrical battery 200 includes casing 2, utmost point core 3 and block subassembly 100, block subassembly 100 is the block subassembly 100 of above-mentioned embodiment, block subassembly 100 can set up on cylindrical battery 200, utmost point core 3 can set up in casing 2, casing 2 has the opening, block subassembly 100 can be used for sealing the opening of casing 2, through setting up electric connection 11 to expose in at least part in through-hole 21 and with the utmost point ear 1 butt of the utmost point core 3 of cylindrical battery 200, can make utmost point post 10 and the utmost point ear 1 lug of the utmost point core 3 of cylindrical battery 200 lug, can shorten the return circuit of electric current, can reduce cylindrical battery 200 internal resistance, thereby can strengthen cylindrical battery 200's overcurrent capacity, and then be favorable to promoting cylindrical battery 200's heavy current charge-discharge performance.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A cap assembly for a cylindrical battery, comprising:
the flow collecting disc is provided with a through hole penetrating through the flow collecting disc;
the pole column is connected with the current collecting disc, the first end of the pole column is fixed in the through hole, the first end of the pole column is provided with an electric connection part, and at least part of the electric connection part is exposed out of the through hole to be abutted against a pole lug of a pole core of the cylindrical battery;
the cover plate is positioned on one side of the current collecting disc and sleeved on the pole, and the cover plate is used for sealing an opening of the shell of the cylindrical battery.
2. The cap assembly for cylindrical batteries according to claim 1, wherein said electrical connection portions protrude from the surface of said current collecting disk on the side facing away from said cap plate.
3. The cap assembly for a cylindrical battery as claimed in claim 1 or 2, wherein the electrical connection portion is plural, and the plural electrical connection portions are sequentially provided at intervals around the axis of the pole.
4. Cap assembly for cylindrical batteries according to claim 1, characterized in that the collector disc has an outer diameter a1The outer diameter of the cover plate is A2And satisfies the relation: a is more than or equal to 8mm1-A2。
5. The cap assembly for cylindrical batteries according to claim 4, characterized in that it further comprises: the support piece is sleeved on the pole and supported between the current collecting disc and the cover plate, the cover plate is provided with a first limiting part, and the support piece is provided with a second limiting part in limiting fit with the first limiting part.
6. The cap assembly for cylindrical batteries according to claim 5, wherein the first retaining member is one of a retaining groove and a retaining boss, the second retaining member is the other of the retaining groove and the retaining boss, and the retaining boss is mounted in the retaining groove.
7. A cap assembly for a cylindrical battery according to claim 1, further comprising a sealing ring sleeved on the pole, wherein a protrusion is disposed on the circumferential wall of the pole, the protrusion is located on the inner side of the cover plate and abuts against the first side of the current collecting plate, and the sealing ring is clamped between the cover plate and the protrusion.
8. A cap assembly for a cylindrical battery as claimed in claim 1, further comprising an insulating sleeve fitted over the terminal, wherein the peripheral wall of the terminal is provided with a protrusion located outside the cover plate, and the insulating sleeve is sandwiched between the cover plate and the protrusion.
9. The cap assembly for cylindrical batteries according to claim 5, characterized in that said support is provided with an avoiding hole, said current collecting disc is provided with a tab welding area, said avoiding hole corresponds to said tab welding area.
10. A cylindrical battery, comprising;
a housing provided with an opening;
the pole core is arranged in the shell;
a cap assembly for a cylindrical battery according to any one of claims 1 to 9, for closing the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121480412.1U CN215070164U (en) | 2021-06-30 | 2021-06-30 | A block subassembly and cylinder battery for cylinder battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121480412.1U CN215070164U (en) | 2021-06-30 | 2021-06-30 | A block subassembly and cylinder battery for cylinder battery |
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| Publication Number | Publication Date |
|---|---|
| CN215070164U true CN215070164U (en) | 2021-12-07 |
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| CN202121480412.1U Active CN215070164U (en) | 2021-06-30 | 2021-06-30 | A block subassembly and cylinder battery for cylinder battery |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114497904A (en) * | 2022-02-24 | 2022-05-13 | 中创新航科技股份有限公司 | Battery assembly method and battery |
| CN114628866A (en) * | 2022-03-28 | 2022-06-14 | 蓝京新能源(嘉兴)有限公司 | High-energy-density cylindrical battery and assembly process thereof |
| CN114678663A (en) * | 2022-04-14 | 2022-06-28 | 广州小鹏汽车科技有限公司 | Pole lug connecting structure of cylindrical battery and cylindrical battery |
| CN114883757A (en) * | 2022-05-31 | 2022-08-09 | 远景动力技术(江苏)有限公司 | Cylindrical battery and electronic equipment |
| CN114899415A (en) * | 2022-07-13 | 2022-08-12 | 楚能新能源股份有限公司 | Collector plate assembly, cylindrical lithium ion battery and assembly process |
| CN114976494A (en) * | 2022-06-14 | 2022-08-30 | 广州小鹏汽车科技有限公司 | Current collecting disc for cylindrical battery |
| CN115377577A (en) * | 2022-09-27 | 2022-11-22 | 厦门海辰储能科技股份有限公司 | End cover assembly, battery sealing method, battery module and electric equipment |
| CN115764180A (en) * | 2022-12-22 | 2023-03-07 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
| WO2023236410A1 (en) * | 2022-06-09 | 2023-12-14 | 湖北亿纬动力有限公司 | Internal battery terminal connection structure and battery |
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| CN114497904A (en) * | 2022-02-24 | 2022-05-13 | 中创新航科技股份有限公司 | Battery assembly method and battery |
| CN114628866A (en) * | 2022-03-28 | 2022-06-14 | 蓝京新能源(嘉兴)有限公司 | High-energy-density cylindrical battery and assembly process thereof |
| CN114678663A (en) * | 2022-04-14 | 2022-06-28 | 广州小鹏汽车科技有限公司 | Pole lug connecting structure of cylindrical battery and cylindrical battery |
| CN114883757A (en) * | 2022-05-31 | 2022-08-09 | 远景动力技术(江苏)有限公司 | Cylindrical battery and electronic equipment |
| WO2023236410A1 (en) * | 2022-06-09 | 2023-12-14 | 湖北亿纬动力有限公司 | Internal battery terminal connection structure and battery |
| CN114976494A (en) * | 2022-06-14 | 2022-08-30 | 广州小鹏汽车科技有限公司 | Current collecting disc for cylindrical battery |
| CN114899415A (en) * | 2022-07-13 | 2022-08-12 | 楚能新能源股份有限公司 | Collector plate assembly, cylindrical lithium ion battery and assembly process |
| WO2024050946A1 (en) * | 2022-09-09 | 2024-03-14 | 湖北亿纬动力有限公司 | Battery |
| CN115377577A (en) * | 2022-09-27 | 2022-11-22 | 厦门海辰储能科技股份有限公司 | End cover assembly, battery sealing method, battery module and electric equipment |
| CN115377577B (en) * | 2022-09-27 | 2023-10-17 | 厦门海辰储能科技股份有限公司 | End cover assembly, battery sealing method, battery module and electric equipment |
| CN115764180A (en) * | 2022-12-22 | 2023-03-07 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
| CN115764180B (en) * | 2022-12-22 | 2024-03-08 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
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