CN114976404A - Battery with a battery cell - Google Patents
Battery with a battery cell Download PDFInfo
- Publication number
- CN114976404A CN114976404A CN202210790503.8A CN202210790503A CN114976404A CN 114976404 A CN114976404 A CN 114976404A CN 202210790503 A CN202210790503 A CN 202210790503A CN 114976404 A CN114976404 A CN 114976404A
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- cell
- battery
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- tab
- battery cell
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- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000004804 winding Methods 0.000 description 9
- 238000003466 welding Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to the technical field of batteries, and discloses a battery which comprises a shell, a battery core and an end cover structure. One end of the shell is provided with an opening, the battery cell can be arranged in the shell through the opening, and the end cover structure is covered on the opening to seal the shell and be electrically connected with the battery cell. Because the end cover structure is arranged at only one end of the shell of the battery, the axial space utilization rate of the battery can be effectively improved, the volume energy density of the battery is improved, and the product performance is ensured. Specifically, the same end of the battery core is provided with a first tab and a second tab with different polarities, when the battery core is placed in the shell, the first tab and the second tab are both arranged towards the opening, the end cover structure comprises a first electrode connecting portion and a second electrode connecting portion, the opening is arranged at the end cover structure cover, the first electrode connecting portion is electrically connected to the first tab, the second electrode connecting portion is electrically connected to the second tab, and the first electrode connecting portion and the second electrode connecting portion are connected through an insulating sealing element, so that short circuit of the battery can be avoided.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery.
Background
The volume energy density is an important performance index of the battery, and the size of the volume energy density directly determines the working time of a product applying the battery. The existing battery is provided with a single-pole lug, a plurality of lugs or a full lug, and the positive lug or the negative lug is respectively arranged at two ends of a winding core, and then the positive lug is connected with a positive pole column of a cover plate, and the negative lug is connected with a negative pole column of the cover plate. The structure can increase the height of the battery in the axial direction, and further, the space utilization rate of the battery is reduced, so that the requirement of seeking higher volume energy density in the prior art cannot be met.
Therefore, a battery is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a battery, which can effectively improve the space utilization rate of the battery and improve the volume energy density of the battery.
As the conception, the technical scheme adopted by the invention is as follows:
a battery, comprising:
a housing having an opening at one end;
the battery cell is arranged in the shell, and the first lug and the second lug are both arranged towards the opening;
the end cover structure covers the opening and comprises a first pole connecting portion and a second pole connecting portion, the first pole connecting portion is electrically connected to the first pole lug, the second pole connecting portion is electrically connected to the second pole lug, and the first pole connecting portion and the second pole connecting portion are connected through an insulating sealing element.
Optionally, the first tab is a positive tab, the first tab connection portion includes a positive post and a positive current collecting disc, and the positive post abuts against the positive tab through the positive current collecting disc;
the second utmost point ear is the negative pole ear, second utmost point connecting portion are including apron and negative current collector dish, the apron passes through negative current collector dish butt the negative pole ear, the positive post with the apron passes through insulating seal connects.
Optionally, the battery cell includes a first battery cell portion and a second battery cell portion, the second battery cell portion is annularly disposed around the circumference of the first battery cell portion, the first battery cell portion only has the positive electrode tab, the positive current collecting disc is disposed on the first battery cell portion, the second battery cell portion only has the negative electrode tab, and the negative current collecting disc is disposed on the second battery cell portion.
Optionally, the electric core includes along the non-utmost point ear of electric core ear and the non-utmost point ear of electric core that self circumference interval set up, electric core ear includes electric core one and is located electric core two portions in the electric core one outside, electric core one only has positive ear, electric core two portions only have negative pole ear, positive current collector set up in electric core one and adjacent two between the electric core one on the non-utmost point ear of electric core, negative current collector set up in electric core two portions and adjacent two between the electric core two on the non-utmost point ear of electric core.
Optionally, the battery cell includes a first battery cell portion and a second battery cell portion that are radially and symmetrically disposed, the first battery cell portion only has the positive electrode tab, the positive current collecting tray is disposed on the first battery cell portion, the second battery cell portion only has the negative electrode tab, and the negative current collecting tray is disposed on the second battery cell portion.
Optionally, the end cap structure further includes an insulating member, the insulating member is disposed on the battery core, and one side of the insulating member is connected to the positive current collecting plate, and the other side of the insulating member is connected to the negative current collecting plate.
Optionally, the insulating part includes insulating one and insulating two, insulating one with insulating two is not in same horizontal plane, positive current collecting plate connect in insulating one deviates from the one side of electric core, negative current collecting plate connect in insulating two is close to the one side of electric core.
Optionally, a groove is formed in the end face of the battery cell, and the insulating member is disposed in the groove.
Optionally, the negative current collecting plate has a connection convex portion arranged away from the battery cell, the cover plate has a connection concave portion arranged toward the battery cell, and the connection convex portion abuts against the connection concave portion.
Optionally, the positive post and the cover plate are riveted to form a receiving groove on the positive post, and the insulating sealing member is clamped between the receiving groove and the cover plate.
The invention has the beneficial effects that:
the battery provided by the invention comprises a shell, a battery cell and an end cover structure, wherein one end of the shell is provided with an opening, the battery cell can be arranged in the shell through the opening, and the end cover structure is covered on the opening to seal the shell and is electrically connected with the battery cell. The battery is provided with the end cover structure only at one end of the shell, so that the axial space utilization rate of the battery can be effectively improved, the volume energy density of the battery is improved, and the product performance is ensured. Specifically, the same end of the battery cell is provided with a first tab and a second tab which have different polarities, and when the battery cell is placed in the shell, the first tab and the second tab are both arranged towards the opening. The end cover structure comprises a first pole connecting part and a second pole connecting part, when the end cover structure is covered on the opening and is connected with the shell, the first pole connecting part is electrically connected with the first pole lug, the second pole connecting part is electrically connected with the second pole lug, and the first pole connecting part and the second pole connecting part are also connected through an insulating sealing element, so that the short circuit caused by the contact of the positive pole and the negative pole of the battery is avoided, and the service performance of the battery is ensured.
Drawings
Fig. 1 is an exploded view of a battery according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a battery cell according to a first embodiment of the present invention;
fig. 3 is a cross-sectional view of a battery according to an embodiment of the present invention;
FIG. 4 is an enlarged view at A in FIG. 3;
fig. 5 is a cross-sectional view of a battery cell provided in a second embodiment of the present invention;
fig. 6 is a cross-sectional view of a battery cell provided in a third embodiment of the present invention;
fig. 7 is a sectional view of a battery provided in a third embodiment of the present invention;
fig. 8 is an enlarged view at B in fig. 7.
In the figure:
1. a housing;
2. an electric core; 20. a groove; 21. an electrode core tab portion; 211. a first battery cell; 212. a second battery cell part; 22. a battery cell non-tab part;
3. an end cap structure; 31. a positive post; 311. a containing groove; 32. a cover plate; 321. a connecting recess; 322. an inner ring; 323. an outer ring; 33. a positive current collector pan; 34. a negative current collecting plate; 341. a connecting projection; 35. an insulating member; 351. an insulating portion; 352. a second insulating part; 36. a first seal ring; 37. a second seal ring;
4. an insulating spacer;
5. and an insulating cover.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
As shown in fig. 1 to fig. 4, the present embodiment provides a battery, which can effectively improve the space utilization rate in the axial direction of the battery, increase the volume energy density of the battery, and ensure the product performance. The battery comprises a shell 1, an electric core 2 and an end cover structure 3, wherein one end of the shell 1 is provided with an opening, the electric core 2 can be arranged in the shell 1 through the opening, the end cover structure 3 is covered on the opening, the electric core 2 can be sealed in the shell 1, and the end cover structure 3 is electrically connected with the electric core 2 so as to ensure the normal use of the battery.
For improving the space utilization rate in the axial direction of the battery, in this embodiment, the same end of the electric core 2 has a first tab and a second tab with different polarities, and when the electric core 2 is placed in the housing 1, the first tab and the second tab are both arranged towards the opening. The end cover structure 3 covers the opening, and the end cover structure 3 comprises a first pole connecting part and a second pole connecting part, wherein the first pole connecting part is electrically connected to the first pole lug, the second pole connecting part is electrically connected to the second pole lug, and the first pole connecting part and the second pole connecting part are connected through an insulating sealing member so as to avoid short circuit caused by contact of the positive pole and the negative pole of the battery.
Specifically, in this embodiment, the first tab is a positive tab, and the first tab connection portion includes a positive post 31 and a positive current collecting plate 33, the positive current collecting plate 33 is disposed on the electric core 2, and the positive tab abuts against the positive post 31 through the positive current collecting plate 33. The second tab is a negative tab, and the second tab connection portion includes a cover plate 32 and a negative current collecting plate 34, the negative current collecting plate 34 is disposed on the electric core 2, and the negative tab abuts against the cover plate 34 through the negative current collecting plate.
As shown in fig. 2, in this embodiment, the first cell portion 211 is a circular structure, and the second cell portion 212 is an annular structure, it is known that the cell 2 is formed by winding the positive plate, the diaphragm and the negative plate, one side of the positive plate in the width direction has the positive electrode current collector, one side of the negative plate in the width direction has the negative electrode current collector, and the cell 2 formed by winding the positive plate has only the positive electrode tab in the first cell portion 211, and has only the negative electrode tab in the second cell portion 212, and a part of the negative current collector and a part of the positive current collector may be cut off before winding. That is, during the initial winding, the wound positive electrode sheet has a positive electrode collector and the negative electrode sheet does not have a negative electrode collector, and during the subsequent winding, the wound positive electrode sheet does not have a positive electrode collector and the negative electrode sheet has a negative electrode collector. In order to ensure the electrical connection between the positive tab and the positive current collecting plate 33 and the electrical connection between the negative tab and the negative current collecting plate 34, the negative current collecting plate 34 is disposed on the second cell part 212 according to the shape of the second cell part 212, and the positive current collecting plate 33 is disposed on the first cell part 211 according to the shape of the first cell part 211. And then welding one surface of the positive current collecting disc 33, which is not abutted to the battery core 2, with the positive pole column 31, and welding one surface of the negative current collecting disc 34, which is not abutted to the battery core 2, with the cover plate 32.
Further, the end cover structure 3 further includes an insulating member 35, the insulating member 35 is disposed on the electric core 2, and one side of the insulating member is connected to the positive current collecting plate 33, and the other side of the insulating member is connected to the negative current collecting plate 34, so as to prevent the electric core 2 from shaking to cause the short circuit caused by the contact between the positive current collecting plate 33 and the negative current collecting plate 34. Optionally, the positive current collecting disk 33, the negative current collecting disk 34 and the insulator 35 are bonded.
In order to ensure that the positive current collecting disk 33 and the negative current collecting disk 34 are always separated by the insulating member 35, the insulating member 35 provided by the present embodiment includes an insulating first portion 351 and an insulating second portion 352 which are not located on the same plane, and the insulating first portion 351 and the insulating second portion 352 are connected by a transition section which is obliquely arranged. When the first insulating part 351 is connected to the positive current collecting disc 33, the positive current collecting disc 33 is adhered to the surface of the first insulating part 351, which is far away from the battery cell 2, and when the second insulating part 352 is connected to the negative current collecting disc 34, the negative current collecting disc 34 is adhered to the surface of the second insulating part 352, which is close to the battery cell 2. I.e. in the horizontal direction, the positive 33 and negative 34 collector discs are always located on both sides of the transition section, and will be separated by the transition section even if the positive 33 and negative 34 collector discs are infinitely close.
Optionally, a groove 20 is disposed on an end surface of the battery cell 2, and the insulating member 35 is disposed in the groove 20. As can be seen from fig. 4, the depth of the groove 20 may be consistent with the thickness of the first insulating portion 351, when the first insulating portion 351 is disposed in the groove 20, one surface of the first insulating portion 351 facing away from the battery cell 2 may abut against one surface of the positive current collecting plate 33 abutting against the battery cell 2, and at this time, one surface of the second insulating portion 352 close to the battery cell 2 needs to abut against one surface of the negative current collecting plate 34 facing away from the battery cell 2. Correspondingly, the positive current collecting disk 33 is of a circular structure, the negative current collecting disk 34 is of an annular structure, and therefore the insulating member 35 is of an annular structure arranged between the positive current collecting disk 33 and the negative current collecting disk 34, and the groove 20 is an annular groove.
Further, in order to secure the connection strength of the cap plate 32 and the negative current collecting plate 34, the cap plate 32 has a connection concave portion 321 provided toward the battery cell 2, and the negative current collecting plate 34 has a connection convex portion 341 provided away from the battery cell 2, and the connection convex portion 341 abuts against the connection concave portion 321. Since a welding defect may be caused in a portion of the cap plate 32 when welding the abutment, glue may be applied to the connection protrusion 341 for filling after welding, thereby ensuring welding effect.
Alternatively, the positive post 31 has a cylindrical structure, the cover plate 32 has an annular structure, the inner ring 322 of the cover plate 32 is connected to the positive post 31 through an insulating seal, and the outer ring 323 of the cover plate 32 is connected to the housing 1. Namely, the cover plate 32 is sleeved on the positive post 31, in the riveting process of the cover plate 32 and the positive post 31, the circumferential surface of the positive post 31 is provided with the accommodating groove 311, in order to ensure the connection sealing effect of the cover plate 32 and the positive post 31, and simultaneously avoid the short circuit between the cover plate 32 and the positive post 31, an insulating sealing member can be sleeved between the positive post 31 and the cover plate 32, after the riveting connection of the cover plate 32 and the positive post 31, the insulating sealing member is clamped between the accommodating groove 311 and the cover plate 32, and the contact between the cover plate 32 and the positive post 31 can be completely avoided. Optionally, the insulating sealing member is a plastic ring, which has elasticity, and can realize interference fit between the cover plate 32 and the positive post 31 to ensure sealing effect.
In this embodiment, the ratio of the outer diameter of the positive post 31 to the outer diameter of the cover plate 32 ranges from 0.2 to 0.7, and the ratio of the outer diameter of the positive current collecting plate 33 to the outer diameter of the negative current collecting plate 34 ranges from 0.45 to 0.7. The thickness range of the cover plate 32 is 0.4mm-1.5mm, the thickness range of the positive current collecting disc 33 is 0.1mm-0.5mm, and the thickness range of the negative current collecting disc 34 is 0.1mm-0.3 mm.
Because the insulating seal needs to ensure that the upper surface, the lower surface and the end surface of the cover plate 32 are not in contact with the positive post 31, the insulating seal needs to cover the above positions, and in this embodiment, the insulating seal includes a first seal ring 36 and a second seal ring 37 which are both in an annular structure. Wherein, first sealing washer 36 includes first sealing washer body and the protruding butt portion of establishing of inner circle that encircles first sealing washer 36, and when first sealing washer 36, apron 32 and second sealing washer 37 were located on positive post 31 in proper order in the cover, second sealing washer 37 and first sealing washer 36 will pass through butt portion butt to isolated inner ring 322 and the positive post 31 of apron 32.
Optionally, as shown in fig. 1, the battery further includes an absolute gasket 4 and an insulating cover 5, when the electric core 2 is placed in the casing 1, the insulating gasket 4 is disposed on a side of the electric core 2 without a tab, and the insulating cover 5 is disposed on the electric core 2, so that the insulating gasket 4 is sandwiched between the insulating cover 5 and the electric core 2, thereby ensuring insulation between the electric core 2 and the casing 1.
Example two
The present embodiment discloses a battery, which is different from the battery in the first embodiment in that: as shown in fig. 5, the battery cell 2 includes a battery cell tab portion 21 and a battery cell non-tab portion 22 arranged at intervals along the circumferential direction of the battery cell, and the battery cell tab portion 21 may be further divided into a battery cell first portion 211 and a battery cell second portion 212, where the battery cell second portion 212 is located outside the battery cell first portion 211. Similarly to the above, the first cell portion 211 has only positive electrode tabs, the second cell portion 212 has only negative electrode tabs, and the cell non-tab portion 22 has no tabs. Because the non-tab portion 22 of the battery cell does not have a positive current collector or a negative current collector, the problem that the battery cell 2 is wrinkled due to uneven thickness in the axial direction of the battery cell 2 in the winding process of the battery cell 2 can be alleviated to a certain extent.
The structures of the positive current collecting disc 33 and the negative current collecting disc 34 in this embodiment are the same as the structures of the positive current collecting disc 33 and the negative current collecting disc 34 in the first embodiment, that is, when the positive current collecting disc 33 is disposed on the cell 2, the positive current collecting disc 33 will be located on the cell non-tab portion 22 between the first cell portion 211 and the adjacent first cell portion 211, and when the negative current collecting disc 34 is disposed on the cell 2, the negative current collecting disc 34 will be located on the cell non-tab portion 22 between the second cell portion 212 and the adjacent second cell portion 212. Therefore, the preparation method of the battery cell 2 is similar to that of the battery cell 2 in the first embodiment, and the positive electrode tab and the negative electrode tab only need to retain the positive current collector or the negative current collector at the positions where the positive electrode tabs or the negative electrode tabs need to be formed.
In addition, the rest of the structure of the battery provided in this embodiment is the same as that of the battery in the first embodiment, and is not described herein again.
EXAMPLE III
The present embodiment discloses a battery, which is different from the battery in the first embodiment in that: as shown in fig. 6 to 8, the battery cell 2 includes a first cell portion 211 and a second cell portion 212, which are radially and symmetrically disposed, where the first cell portion 211 has only positive electrode tabs, the second cell portion 212 has only negative electrode tabs, the positive current collecting plate 33 is disposed on the first cell portion 211, and the negative current collecting plate 34 is disposed on the second cell portion 212. Referring to fig. 6, if the first cell part 211 and the second cell part 212 are both in a semicircular structure, the positive current collecting plate 33 may be provided in a semicircular structure, and the negative current collecting plate 34 may be provided in a semicircular structure, that is, unlike the positive current collecting plate 33 and the negative current collecting plate 34 provided in the first and second embodiments, the positive current collecting plate 33 is provided at one side of the negative current collecting plate 34, and the non-positive current collecting plate 33 is provided at an inner circle of the negative current collecting plate 34.
Similar to the dimensions of the portions of the end cap structure 3 in the first embodiment, the ratio of the radius of the positive collecting disk 33 to the radius of the outer ring of the negative collecting disk 34 ranges from 0.45 to 0.7. In addition, the ratio of the outer diameter of the positive pole 31 to the outer diameter of the cover plate 32 ranges from 0.2 to 0.7, the thickness of the cover plate 32 ranges from 0.4mm to 1.5mm, the thickness of the positive current collecting plate 33 ranges from 0.1mm to 0.5mm, and the thickness of the negative current collecting plate 34 ranges from 0.1mm to 0.3 mm.
In this arrangement, the positive current collecting plate 33 is welded to the positive post 31, and the positive current collecting plate 33 should not exceed the position of the winding hole formed in the cell 2 during the winding process, i.e., the distance between the positive current collecting plate 33 and the negative current collecting plate 34 is relatively large, so that the structure of the insulating member 35 can be omitted to simplify the battery assembling process. Alternatively, the positive post 31 is welded to the cell 2 through the positive current collecting disc 33, and there is a gap between the positive post 31 and the cell 2, so even if the positive post 31 is disposed in the middle of the cell 2, the positive post 31 still does not abut against the second cell part 212, i.e., a short circuit does not occur.
In addition, the rest of the structure of the battery provided in this embodiment is the same as that of the battery in the first embodiment, and is not described herein again.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A battery, comprising:
a housing (1) having an opening at one end;
the battery cell (2) is provided with a first tab and a second tab which have different polarities at the same end of the battery cell (2), the battery cell (2) is arranged in the shell (1), and the first tab and the second tab are both arranged towards the opening;
the end cover structure (3) is covered on the opening, the end cover structure (3) comprises a first pole connecting portion and a second pole connecting portion, the first pole connecting portion is electrically connected to the first pole lug, the second pole connecting portion is electrically connected to the second pole lug, and the first pole connecting portion and the second pole connecting portion are connected through an insulating sealing element.
2. The battery according to claim 1, wherein the first tab is a positive tab, the first pole connection comprises a positive post (31) and a positive current collector disc (33), the positive post (31) abuts the positive tab through the positive current collector disc (33);
the second utmost point ear is the negative pole ear, the second utmost point connecting portion are including apron (32) and negative current collection dish (34), apron (32) are passed through negative current collection dish (34) butt the negative pole ear, anodal post (31) with apron (32) pass through insulating seal connects.
3. The battery according to claim 2, wherein the cell (2) comprises a first cell part (211) and a second cell part (212), the second cell part (212) is arranged around the first cell part (211), the first cell part (211) only has the positive electrode tab, the positive current collecting disc (33) is arranged on the first cell part (211), the second cell part (212) only has the negative electrode tab, and the negative current collecting disc (34) is arranged on the second cell part (212).
4. The battery according to claim 2, wherein the battery cell (2) comprises a battery cell lug part (21) and a battery cell non-polar lug part (22) which are arranged along the circumferential direction of the battery cell (2), the battery cell lug part (21) comprises a battery cell part (211) and a battery cell part (212) which is positioned outside the battery cell part (211), the battery cell part (211) only has the positive electrode lug, the battery cell part (212) only has the negative electrode lug, the positive current collecting disc (33) is arranged on the battery cell non-polar lug part (22) between the battery cell part (211) and two adjacent battery cell parts (211), and the negative current collecting disc (34) is arranged on the battery cell non-polar lug part (22) between the battery cell part (212) and two adjacent battery cell parts (212).
5. The battery according to claim 2, wherein the cell (2) comprises a first cell portion (211) and a second cell portion (212) which are radially and symmetrically arranged, the first cell portion (211) has only the positive electrode tab, the positive current collecting disc (33) is arranged on the first cell portion (211), the second cell portion (212) has only the negative electrode tab, and the negative current collecting disc (34) is arranged on the second cell portion (212).
6. The battery according to claim 3 or 4, characterized in that the end cap structure (3) further comprises an insulating member (35), wherein the insulating member (35) is arranged on the cell (2) and is connected with the positive current collecting disc (33) on one side and the negative current collecting disc (34) on the other side.
7. The battery according to claim 6, characterized in that the insulating member (35) comprises a first insulating portion (351) and a second insulating portion (352), the first insulating portion (351) and the second insulating portion (352) are not in the same horizontal plane, the positive current collecting disc (33) is connected to the side of the first insulating portion (351) facing away from the cell (2), and the negative current collecting disc (34) is connected to the side of the second insulating portion (352) facing away from the cell (2).
8. The battery according to claim 6, characterized in that a groove (20) is provided on the end face of the cell (2), and the insulating member (35) is disposed in the groove (20).
9. The battery according to any one of claims 2 to 5, characterized in that the negative collector disc (34) has a connecting projection (341) arranged away from the cell (2), the cover plate (32) has a connecting recess (321) arranged towards the cell (2), the connecting projection (341) abutting against the connecting recess (321).
10. The battery according to any one of claims 2 to 5, wherein the positive post (31) and the cap plate (32) are riveted to form a receiving groove (311) on the positive post (31), and the insulating seal member is interposed between the receiving groove (311) and the cap plate (32).
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210790503.8A CN114976404A (en) | 2022-07-05 | 2022-07-05 | Battery with a battery cell |
| PCT/CN2022/120767 WO2023173716A1 (en) | 2022-07-05 | 2022-09-23 | Battery |
| EP22818598.9A EP4276987A1 (en) | 2022-07-05 | 2022-09-23 | Battery |
| US18/088,804 US20240014487A1 (en) | 2022-07-05 | 2022-12-27 | Battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210790503.8A CN114976404A (en) | 2022-07-05 | 2022-07-05 | Battery with a battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114976404A true CN114976404A (en) | 2022-08-30 |
Family
ID=82968231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210790503.8A Pending CN114976404A (en) | 2022-07-05 | 2022-07-05 | Battery with a battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114976404A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023173716A1 (en) * | 2022-07-05 | 2023-09-21 | 湖北亿纬动力有限公司 | Battery |
| CN116895850A (en) * | 2023-09-08 | 2023-10-17 | 深圳市誉辰智能装备股份有限公司 | Cylindrical battery and manufacturing method thereof |
-
2022
- 2022-07-05 CN CN202210790503.8A patent/CN114976404A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023173716A1 (en) * | 2022-07-05 | 2023-09-21 | 湖北亿纬动力有限公司 | Battery |
| CN116895850A (en) * | 2023-09-08 | 2023-10-17 | 深圳市誉辰智能装备股份有限公司 | Cylindrical battery and manufacturing method thereof |
| CN116895850B (en) * | 2023-09-08 | 2023-12-29 | 深圳市誉辰智能装备股份有限公司 | Cylindrical battery and manufacturing method thereof |
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