CN116314847B - Cylindrical battery, assembly method and electric equipment - Google Patents
Cylindrical battery, assembly method and electric equipment Download PDFInfo
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- CN116314847B CN116314847B CN202310565891.4A CN202310565891A CN116314847B CN 116314847 B CN116314847 B CN 116314847B CN 202310565891 A CN202310565891 A CN 202310565891A CN 116314847 B CN116314847 B CN 116314847B
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- current collecting
- collecting disc
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- fixing ring
- fixing
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000007704 transition Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 description 30
- 238000003466 welding Methods 0.000 description 23
- 238000012545 processing Methods 0.000 description 9
- 239000004020 conductor Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to a cylindrical battery, an assembly method and electric equipment, which comprises the following steps: a housing; the battery cell is positioned in the shell, two ends of the battery cell are provided with tab layers, and the polarities of the tab layers at the two ends are opposite; the conductive assembly is positioned at the end part of the battery cell and comprises a fixing ring and a current collecting disc, wherein the fixing ring and the current collecting disc are fixedly arranged, the fixing ring and the shell are fixedly arranged so that the current collecting disc is abutted to the tab layer, and the current collecting disc is electrically connected with the tab layer; the lug layer at least one end of the battery core is electrically connected with the cap assembly and/or the shell of the battery through the conductive assembly. The internal resistance of the cylindrical battery is reduced, the overcurrent capacity of the battery core is increased, and the energy conversion rate of the battery core is improved.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a cylindrical battery, an assembly method and electric equipment.
Background
At present, the lithium ion battery has the advantages of high energy density, long cycle life, good multiplying power performance, good safety, environmental protection and being an important energy product for modern electronic products and power automobiles. Cylindrical batteries have become one of the important research directions in the field of power batteries by virtue of high energy density, high safety and low cost.
The current cylindrical battery cathode tab is connected with the cap assembly, a cathode bending current collecting disc is generally adopted to be welded with the cap assembly, and the cathode bending current collecting disc structure is divided into a current collector part and a bending part according to functions, wherein the current collector part is used for being welded with the tab, and the bending part is used for being welded with the cap assembly. The negative electrode bending current collecting disc structure comprises the assembly steps of firstly carrying out ultrasonic welding on a negative electrode lug of a battery cell and a current collecting disc, then welding a bending part of the current collecting disc with a pole column on a cap assembly, bending the bending part of the current collecting disc, putting the battery cell into a shell, and finally welding the cap assembly with an opening end of the shell. Referring to fig. 1 (a), a connection diagram of a negative electrode bending current collecting disc and a cap assembly before bending is shown, wherein the negative electrode bending current collecting disc 10 is not bent and is provided with a weak bending portion 11, and referring to fig. 1 (b), a connection diagram of a bent negative electrode bending current collecting disc and a cap assembly is shown, wherein the bending portion of the negative electrode bending current collecting disc 10 is bent.
The bending current collecting disc of the negative electrode is provided with the weak part at the bending part, so that the bending part is convenient to bend, but the bending part is longer and has the weak part, so that the internal resistance of the current collecting disc is larger, and the current collecting disc is not suitable for a large-current battery core.
And, the bending structure is higher to the equipment requirement, is difficult to guarantee the mass flow disc height uniformity after buckling, and mass flow disc and negative pole ear contact are inseparable, can pull the utmost point ear after the utmost point ear welding, lead to utmost point ear fracture, be unfavorable for the stability of electric core inner structure.
Disclosure of Invention
Therefore, the invention aims to overcome the technical defects of bending parts, larger resistance and poor structural stability of the current collecting disc of the cylindrical battery in the prior art, and the cylindrical battery has the advantages of small resistance, suitability for high-current charge and discharge, high space utilization rate and good structural stability.
In order to solve the above technical problems, the present invention provides a cylindrical battery, comprising:
a housing;
the battery cell is positioned in the shell, two ends of the battery cell are provided with tab layers, and the polarities of the tab layers at the two ends are opposite;
the conductive assembly is positioned at the end part of the battery cell and comprises a fixing ring and a current collecting disc, wherein the fixing ring and the current collecting disc are fixedly arranged, the fixing ring and the shell are fixedly arranged so that the current collecting disc is abutted to the tab layer, and the current collecting disc is electrically connected with the tab layer;
the lug layer at least one end of the battery core is electrically connected with the cap assembly and/or the shell of the battery through the conductive assembly.
In some embodiments, the fixed ring comprises an outer ring and an inner ring which are sequentially arranged from outside to inside;
the outer ring is fixed with the shell;
the inner ring is provided with a first surface, and the first surface is contacted and/or fixed with the collecting disc.
In some embodiments, a transition is provided between the outer ring and the inner ring.
In some embodiments, a second surface is also provided on the inner ring, the second surface being disposed opposite the first surface, the second surface being in contact with and/or secured to the cap assembly.
In some embodiments, the outer ring and the inner ring are not uniform in height along their axial directions, and the inner ring is disposed proximate to the cell.
In some embodiments, the fixing ring is provided with at least two limiting protrusions, the collecting disc is provided with limiting grooves, and the limiting grooves and the limiting protrusions are arranged in one-to-one correspondence; or,
the current collecting plate is provided with at least two limiting protrusions, the fixing ring is provided with limiting grooves, and the limiting grooves and the limiting protrusions are arranged in one-to-one correspondence.
In some embodiments, the retaining ring is integrally formed with the manifold plate.
The invention discloses an assembly method of a cylindrical battery, which comprises the following steps:
acquiring a conductive assembly, wherein the conductive assembly comprises a fixed ring and a current collecting disc;
fixing the fixing ring and the collecting disc;
the battery cell is arranged in a shell of the battery, and the fixing ring is fixed with the shell so that the current collecting disc is abutted against a lug layer at the end part of the battery cell;
fixing the collector plate and the lug layer contacted with the collector plate;
and acquiring a cap assembly, and fixing the cap assembly and the fixing ring.
The invention discloses an assembly method of a cylindrical battery, which comprises the following steps:
the method comprises the steps of obtaining a conductive assembly, wherein the conductive assembly comprises a fixed ring and a current collecting disc, and the fixed ring and the current collecting disc are integrally formed;
the battery cell is arranged in a shell of the battery, and the fixing ring is fixed with the shell so that the current collecting disc is abutted against a lug layer at the end part of the battery cell;
fixing the collector plate and the lug layer contacted with the collector plate;
and acquiring the cap assembly, and fixing the cap assembly with the fixing ring.
The invention discloses an assembly method of a cylindrical battery, which comprises the following steps:
acquiring a battery cell, wherein both ends of the battery cell are respectively provided with a positive electrode lug layer and a negative electrode lug layer;
fixing the positive current collecting disc with the positive tab layer, and fixing the negative current collecting disc with the fixing ring;
the battery cell is arranged in the shell, and the fixing ring is fixed with the shell so that the negative current collecting disc is pressed against the negative electrode lug layer;
fixing the negative current collecting disc with the negative lug layer;
and acquiring the cap assembly, and fixing the cap assembly with the fixing ring.
The invention discloses electric equipment, which comprises the cylindrical battery, and the cylindrical battery has the following advantages compared with the prior art:
1. according to the invention, the conductive assembly is arranged, so that the fixing ring of the conductive assembly is fixedly arranged with the current collecting disc, and the fixing ring is fixedly arranged with the shell, so that the current collecting disc is abutted against the tab layer and is tightly attached to the tab layer, and the overcurrent capacity is improved.
2. Compared with the prior art, the current collecting disc provided by the invention has the advantages that the bending part is omitted, so that the structure of the current collecting disc is simplified, the assembly efficiency of the battery cell is improved, the stability of the internal structure of the battery cell can be improved due to the close fit between the current collecting disc and the tab layer, the internal resistance of the cylindrical battery can be reduced due to the elimination of the bending part, the overcurrent capacity of the battery cell is improved, and the energy conversion rate of the battery cell is improved.
3. In the invention, the fixing ring is fixedly arranged with the shell, the shell is similar to a reference standard, and under the condition that the fixing ring is fixed with the current collecting disc, the current collecting disc is fixed in position, so that the current collecting disc is tightly attached to the tab layer all the time.
4. According to the invention, as the current collecting disc is fixed with the shell through the fixing ring, the current collecting disc cannot be inclined or swayed in the subsequent processing processes of welding with the tab layer and the like, and the processing precision is improved.
5. According to the invention, a worker can design the current collecting disc and the fixing ring according to actual working requirements, and the distance between the current collecting disc and the end part of the battery cell is controlled within a preset range under the condition that the fixing ring is fixed, so that the assembly precision is improved.
Compared with the prior art, the assembly method provided by the invention has the following advantages:
1. according to the assembly method, the fixed current collecting disc and the fixed ring are sequentially placed on the tab layer, the fixed ring is pressed downwards towards the battery cell, so that the current collecting disc is tightly attached to the tab layer, and then the fixed ring is fixed with the shell, so that the current collecting disc is always tightly attached to the tab layer, the assembly precision is improved, and the overcurrent capacity is guaranteed.
2. According to the assembly method, the fixing ring is fixed with the shell, and the fixing ring is fixed with the current collecting disc, so that the position of the current collecting disc can be fixed, the current collecting disc cannot be tilted or swayed in the subsequent processing processes of welding with the tab layer and the like, and the processing precision is improved.
Drawings
Fig. 1 is a schematic structural diagram of a connection between a current collecting plate and a cap assembly in the background art, wherein (a) a bending portion of the current collecting plate is not bent, and (b) a bending portion of the current collecting plate is bent;
FIG. 2 is a schematic view of a conductive assembly and tab layer;
fig. 3 is a schematic structural view of a cylindrical battery;
FIG. 4 is an enlarged view of a portion of FIG. 3 at area A;
FIG. 5 is a schematic structural view of a retaining ring;
FIG. 6 is a front view of the retaining ring;
fig. 7 is a schematic view of the structure of the manifold, retaining ring and cap assembly.
Description of the specification reference numerals: 10. a collecting tray; 101. a positive current collecting plate; 102. a negative current collecting plate; 103. a limit groove; 11. a bending portion; 12. a fixing ring; 121. an outer ring; 122. a transition section; 123. an inner ring; 123a, a first surface; 123b, a second surface; 124. a limit protrusion; 20. a cap assembly; 30. a housing; 31. a battery cell; 40. a tab layer; 401. a positive electrode tab layer; 402. a negative electrode ear layer; 50. and a positive electrode post.
Detailed Description
Certain terms are used throughout the description and claims to refer to particular components. It will be appreciated by those of ordinary skill in the art that different terms may be used to refer to the same component. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 2-3, the present invention discloses a cylindrical battery including a case 30, a cell 31, and a conductive member.
The battery cell 31 is positioned in the shell 30, the lug layers 40 are arranged at the two ends of the battery cell 31, and the polarities of the lug layers 40 at the two ends are opposite.
The conductive component is located at the end of the battery core 31, the conductive component comprises a fixing ring 12 and a current collecting disc 10, the fixing ring 12 and the current collecting disc 10 are fixedly arranged, the fixing ring 12 and the shell 30 are fixedly arranged so that the current collecting disc 10 abuts against the tab layer 40, and the current collecting disc 10 is electrically connected with the tab layer 40.
The tab layer 40 at least one end of the battery cell 31 is electrically connected to the cap assembly 20 and/or the housing 30 of the battery through a conductive assembly.
The working principle of the invention is as follows: in the invention, by arranging the conductive component, the fixing ring 12 of the conductive component is fixedly arranged with the current collecting disc 10, and the fixing ring 12 is fixedly arranged with the shell 30, so that the current collecting disc 10 is abutted against the tab layer 40 and tightly attached to the tab layer 40, thereby improving the overcurrent capacity.
Compared with the prior art, the current collecting disc 10 provided by the invention has the advantages that the bending part is omitted, so that the structure of the current collecting disc 10 is simplified, the assembly efficiency of the battery core 31 is improved, the overcurrent stability of the battery can be ensured, the internal structural stability of the battery core 31 is improved due to the close fit between the current collecting disc 10 and the tab layer 40, the internal resistance of the cylindrical battery can be reduced, the overcurrent capacity of the battery core 31 is improved, and the energy conversion rate of the battery core 31 is improved due to the fact that the bending part is omitted.
In the invention, the fixing ring 12 is fixedly arranged with the shell 30, the shell 30 is similar to a reference standard, under the condition that the fixing ring 12 is fixed in position, the fixing ring 12 is fixed with the current collecting disc 10, then, the current collecting disc 10 is fixed in position, and the current collecting disc 10 is abutted against the tab layer 40, so that the current collecting disc 10 can be ensured to be tightly attached to the tab layer 40 all the time, the current collecting disc 10 can not be skewed and rocked in the subsequent processing processes of welding with the tab layer 40 and the like, the processing precision is improved, in addition, a worker can design the current collecting disc 10 and the fixing ring 12 according to actual working requirements, and under the condition that the fixing ring 12 is fixed, the distance between the current collecting disc 10 and the end part of the electric core 31 is controlled within a preset range, so that the assembly precision is improved.
In the present invention, the tab layer 40 at least one end of the battery cell 31 is electrically connected to the cap assembly 20 and/or the housing 30 of the battery through a conductive assembly, specifically, in an embodiment, one end of the battery cell 31 may be provided with a conductive assembly, the tab layer 40 at the end of the battery cell 31 is electrically connected to the conductive assembly, the fixing ring 12 of the conductive assembly may be electrically connected to the cap assembly 20, or the fixing ring 12 of the conductive assembly may be electrically connected to the housing 30, or the fixing ring 12 of the conductive assembly may be electrically connected to the cap assembly 20 and the housing 30. It can be appreciated that the electrical connection between the fixing ring 12 and the cap assembly 20 may be a cap chip electrical connection between the fixing ring 12 and the cap assembly 20, or a pole electrical connection between the fixing ring 12 and the cap assembly 20. In another embodiment, the two ends of the battery cell 31 may be provided with conductive elements, and the tab layers 40 at the end of the battery cell 31 are electrically connected to the conductive elements at the side, respectively, and the fixing ring 12 of the conductive element may be electrically connected to the cap assembly 20, or the fixing ring 12 of the conductive element may be electrically connected to the housing 30.
The implementation principle of the invention is as follows:
according to the resistance calculation formula of the conductor: r=ρl/s, R is resistance, ρ is conductivity, L is length, s is cross-sectional area, and the longer the conductor, the greater the resistance. Similarly, the length of the current collecting plate 10 is increased by the bent part, and the resistance is correspondingly increased, so that the current loss after the current on the tab reaches the pole through the current collecting plate 10 is increased.
After the bending part is removed, the length of the current collecting disc 10 is reduced, and the resistance is correspondingly reduced; and the part of the fixing ring 12 is added, current can be transmitted through the edge of the collecting disc 10, the cross-sectional area is increased, and the resistance is correspondingly reduced.
As described above, the bending portion of the current collecting plate 10 is removed, and the fixing ring 12 is added, so that the overall resistance can be reduced compared with that of the bent current collecting plate 10, the overcurrent capacity of the battery cell 31 is increased, the energy loss is reduced, and the energy conversion rate is improved.
Referring to fig. 5 to 7, the fixing ring 12 includes an outer ring 121, a transition portion 122, and an inner ring 123, which are sequentially disposed from outside to inside. The outer ring 121 is welded to the housing 30. The inner ring 123 includes oppositely disposed first and second surfaces 123a, 123b, the first surface 123a contacting and/or securing the current collecting plate 10 and the second surface 123b contacting and/or securing the cap assembly 20.
In the present invention, the fixing ring 12 is made of a conductive material, the outer ring 121 is welded to the housing 30, and the first surface 123a of the inner ring 123 is contacted with or fixed to the current collecting plate 10, or is fixed after contacting, and the second surface 123b of the inner ring 123 is contacted with or fixed to the cap assembly 20, or is fixed after contacting. In general, the retaining ring 12 serves two functions: firstly, the fixing ring 12 can be used for fixing the current collecting disc 10, so that the current collecting disc 10 is tightly attached to the tab layer 40; secondly, the fixing ring 12 can conduct current, and the current on the tab layer 40 is conducted to the cap assembly 20.
Specifically, the outer ring 121, the transition portion 122 and the inner ring 123 of the fixed ring 12 are all annular, the central axes of the three are coincident, the outer diameter of the outer ring 121 is the largest, the outer diameter of the inner ring 123 is the smallest, and the transition portion 122 is located between the outer ring 121 and the inner ring 123. Also, the outer ring 121 is sized to match the opening of the housing 30, and the outer periphery of the outer ring 121 may be welded to the housing 30. The first surface 123a of the inner ring 123 is attached to the current collecting plate 10, and the second surface 123b is attached to the cap assembly 20, so that the current passing capability of the cylindrical battery can be further improved, and the first surface 123a and the current collecting plate 10 can be contacted with each other in a large area, and the second surface 123b and the cap assembly 20 can be contacted with each other in a large area.
The outer ring 121 is not identical in height with the inner ring 123 in the axial direction thereof, and the inner ring 123 is disposed close to the battery cell 31. So, the cap subassembly 20 of being convenient for is laminated to be contacted and fixed with interior ring 123, and outer loop 121 is contacted and fixed with casing 30, and further, transition portion 122 is the angle setting with interior ring 123, and so, transition portion 122 can be spacing cap subassembly 20 to, guarantee assembly precision.
Referring to fig. 7, at least two limiting protrusions 124 are disposed on the fixing ring 12, and limiting grooves 103 are formed on the collecting tray 10, wherein the limiting grooves 103 are disposed in one-to-one correspondence with the limiting protrusions 124, and the limiting protrusions 124 are disposed on the inner ring 123 of the fixing ring 12. Or, at least two limiting protrusions 124 are arranged on the collecting tray 10, limiting grooves 103 are formed in the fixing ring 12, the limiting grooves 103 and the limiting protrusions 124 are arranged in one-to-one correspondence, and the limiting grooves 103 are arranged on an inner ring 123 of the fixing ring 12. By clamping the limiting protrusion 124 in the limiting groove 103, good assembly accuracy between the fixing ring 12 and the collecting tray 10 can be ensured. After the fixing ring 12 and the collecting tray 10 are assembled, the fixing ring 12 and the collecting tray 10 can be fixed by welding, so that the better structural strength of the cylindrical battery is ensured.
Preferably, the fixing ring 12 is made of aluminum, and has a circular ring structure, and the inner ring 123 is provided with a limiting protrusion 124, and the limiting protrusion 124 is matched with the limiting groove 103 of the collecting tray 10 to avoid mutual rotation.
Further, the fixing ring 12 may be integrally formed with the collecting tray 10. After the fixing ring 12 and the collecting plate 10 are integrally formed, the assembling step of the fixing ring 12 and the collecting plate 10 can be omitted, so that the assembling time of the cylindrical battery is saved. The fixing ring 12 and the collecting plate 10 are integrally formed, so that the processing difficulty of the integrally formed structure is increased, but a better electric contact area can be ensured, and the structural stability is better.
Further, the fixing ring 12 is fixed to the housing 30 by welding or clamping. Of course, after the fixing ring 12 is clamped and positioned with the housing 30, the fixing ring 12 and the housing 30 may be welded. In addition, other fixing means in the prior art can be adopted, and the fixing method is not limited to welding or clamping.
Next, an assembling method of the cylindrical battery according to the present invention will be described.
In one embodiment, the invention discloses a method for assembling a cylindrical battery, comprising the following steps:
step one, a conductive assembly is obtained, which includes a fixing ring 12 and a current collecting plate 10.
And step two, fixing the fixing ring 12 and the collecting disc 10.
Here, the fixing ring 12 may be fixed to the current collecting plate 10 by welding, or the fixing ring 12 may be fixed to the current collecting plate 10 by fastening, or the fixing ring 12 may be fastened to the current collecting plate 10 and then the fixing ring 12 may be welded to the current collecting plate 10. The fixing ring 12 and the collecting plate 10 are made of conductive materials. Specifically, the material shells of the fixing ring 12 and the collecting tray 10 are copper. The collecting disc 10 can be disc-shaped, and has a good flow guiding effect.
Step three, providing a battery cell 31 and a shell 30, wherein a lug layer 40 is arranged on the end face of the battery cell 31, the battery cell 31 is arranged in the shell 30 of the battery, and the fixing ring 12 and the shell 30 are fixed so that the current collecting disc 10 abuts against the lug layer 40 at the end part of the battery cell 31.
For the tab layer 40 on the end face of the battery cell 31, it is necessary to perform a flattening treatment, that is, to sort and flatten the tabs in a certain rule or manner, and the essence of flattening is to bend the end portions of all the tabs toward the end face after extending along the height direction of the battery cell 31, so as to form a flat surface. In the industry, rubbing and flattening are also called flattening or patting. The pole lugs after the rubbing treatment can be better welded with the current collecting disc 10.
An opening may be provided in the housing 30, the battery cell 31 may be mounted in the housing 30 from the opening, and then the fixed current collecting plate 10 and the fixing ring 12 may be mounted in the housing 30 from the opening.
After the battery cell 31 is installed in the battery case 30, the fixed current collecting disc 10 and the fixed ring 12 are located on one side of the tab layer 40 of the battery cell 31, wherein the current collecting disc 10 is close to the tab layer 40, the fixed ring 12 is pressed downwards towards the battery cell 31, so that the current collecting disc 10 is tightly attached to the tab layer 40, and then the fixed ring 12 is fixed with the case 30, so that the current collecting disc 10 is always tightly attached to the tab layer 40.
And fourthly, fixing the collector plate 10 and the tab layer 40 contacted with the collector plate.
Specifically, the fixation between the current collecting plate 10 and the tab layer 40 in contact therewith may be achieved using laser penetration welding. Correspondingly, a plurality of welding areas can be arranged on the current collecting disc 10 and uniformly distributed along the circumferential direction of the current collecting disc 10, so that the welding area of the current collecting disc 10 and the tab layer 40 can be enlarged, and the stability of the cylindrical battery is improved.
Step five, acquiring the cap assembly 20, and fixing the cap assembly 20 with the fixing ring 12.
Specifically, the surface of the fixing ring 12 facing the side of the cap assembly 20 is fixed to the fixing ring 12, the surface of the fixing ring 12 facing the current collecting plate 10 may be fixed to the current collecting plate 10, and the outer circumference of the fixing ring 12 may be fixed to the case 30.
The fixation between the cap assembly 20 and the fixation ring 12 may be by laser welding.
In another embodiment, the invention discloses a method for assembling a cylindrical battery, comprising the steps of:
step one, obtaining a conductive assembly, wherein the conductive assembly comprises a fixed ring 12 and a current collecting disc 10, and the fixed ring 12 and the current collecting disc 10 are integrally formed.
Here, by obtaining the fixing ring 12 and the collecting tray 10 integrally formed, structural stability can be improved, and overcurrent capability can be ensured.
Step two, the battery cell 31 is installed in the battery shell 30, and the fixing ring 12 and the shell 30 are fixed so that the current collecting disc 10 abuts against the tab layer 40 at the end part of the battery cell 31.
The housing 30 may be provided with an opening, and the battery cells 31 are inserted into the battery housing 30 from the opening, and then the integrated collecting tray 10 and the fixing ring 12 are inserted from the opening.
Here, since the collecting tray 10 is integrally formed with the fixing ring 12, when the fixing ring 12 is fixed to the case 30, the collecting tray 10 is fixed to the case 30,
and thirdly, fixing the collector plate 10 and the tab layer 40 contacted with the collector plate. Also, here, the current collecting plate 10 and the tab layer 40 may be fixed by laser penetration welding.
And step four, acquiring the cap assembly 20, and fixing the cap assembly 20 with the fixing ring 12.
In another embodiment, referring to fig. 2-4, the invention discloses a method for assembling a cylindrical battery, comprising the steps of:
step one, obtaining a battery cell 31, wherein both ends of the battery cell 31 are respectively provided with a positive electrode ear layer 401 and a negative electrode ear layer 402.
Step two, the positive current collecting plate 101 is fixed with the positive tab layer 401, and the negative current collecting plate 102 is fixed with the fixing ring 12.
Here, the positive current collecting plate 101 may be welded on the positive tab layer 401 by laser welding. The negative collector plate 102 is welded to the fixing ring 12 by laser welding.
Step three, the battery cell 31 is installed in the shell 30, and the fixing ring 12 is welded with the opening of the shell 30 so that the negative current collecting disc 102 presses against the negative electrode ear layer 402.
Step four, fixing the negative current collecting plate 102 with the negative electrode ear layer 402.
Specifically, laser penetration welding may be used to weld negative current collector plate 102 to negative ear layer 402.
Thereafter, the positive electrode tab and the positive electrode post 50 may be connected by ultrasonic torque welding.
Step five, acquiring the cap assembly 20, and fixing the cap assembly 20 with the fixing ring 12.
And step six, after the battery is filled with the liquid, sealing and welding the sealing nails and the liquid filling holes in a laser welding mode. The sealing spike may be a steel spike.
It should be noted that, the fixing ring 12 of the present invention may be applied to the negative electrode tab layer 402 and the negative current collecting plate 102, or may be applied to the positive electrode tab layer 401 and the positive current collecting plate 101, and when applied to the positive current collecting plate 101, the positive current collecting plate 101 and the fixing ring 12 may be integrally formed.
It should be noted that, in the cylindrical battery of the present invention, the fixing ring 12 is fixed to the current collecting plate 10, and then the current collecting plate 10 and the tab layer 40 are fixed, which is because: the fixing ring 12 is welded to the case 30, so that the position of the fixing ring 12 on the cylindrical battery is fixed, and thus, the distance between the fixing ring 12 and the end surface of the battery cell 31 is fixed, and the current collecting plate 10 is compacted with the tab layer 40, if the current collecting plate 10 and the tab layer 40 are welded first, the compaction space is not well controlled, and the current collecting plate 10 may not touch the fixing ring 12 after compaction or be higher than the fixing ring 12. Therefore, the fixing ring 12 is fixed with the collector plate 10, the collector plate 10 is ensured to be compacted with the tab layer 40 under the condition of fixing the fixing ring 12, and finally, the collector plate 10 is fixed with the tab layer 40.
Compared with the prior art, the assembly method of the cylindrical battery has the following advantages:
1. in the assembly method of the invention, the fixed current collecting disc 10 and the fixed ring 12 are placed on the tab layer 40 in sequence, the fixed ring 12 is pressed downwards towards the direction of the battery cell 31, so that the current collecting disc 10 is tightly attached to the tab layer 40, and then the fixed ring 12 is fixed with the shell 30, thereby ensuring that the current collecting disc 10 is always tightly attached to the tab layer 40, improving the assembly precision and ensuring the overcurrent capability.
2. According to the assembly method, as the fixing ring 12 is fixed with the shell 30 and the fixing ring 12 is fixed with the current collecting disc 10, the position of the current collecting disc 10 can be fixed, so that the current collecting disc 10 cannot be tilted or swayed in the subsequent processing processes of welding with the tab layer 40 and the like, and the processing precision is improved.
The invention discloses electric equipment, which comprises the cylindrical battery, and the main design key point of the invention is that the structure of the cylindrical battery is improved, and other structures of the electric equipment, such as an electric connection part and a mechanical structure part of the electric equipment are not repeated.
The electric device may be various electric devices such as an automobile, a cellular phone, a computer, a ship, a spacecraft, an electric toy, and an electric tool. The embodiment of the invention does not limit the electric equipment in particular.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (11)
1. A cylindrical battery, comprising:
a housing (30);
the battery cell (31) is positioned in the shell (30), lug layers (40) are arranged at two ends of the battery cell (31), and polarities of the lug layers (40) at two ends are opposite;
the conductive assembly is positioned at the end part of the battery core (31) and comprises a fixing ring (12) and a current collecting disc (10) which can conduct electricity, the fixing ring (12) and the current collecting disc (10) are fixedly arranged, the fixing ring (12) and the shell (30) are fixedly arranged so that the current collecting disc (10) is abutted against the tab layer (40), and the current collecting disc (10) is electrically connected with the tab layer (40);
the tab layer (40) at least one end of the battery core (31) is electrically connected with the cap assembly (20) and/or the shell (30) of the battery through the conductive assembly.
2. The cylindrical battery according to claim 1, wherein the fixing ring (12) comprises an outer ring (121) and an inner ring (123) which are sequentially arranged from outside to inside;
the outer ring (121) is fixed with the housing (30);
the inner ring (123) is provided with a first surface (123 a), and the first surface (123 a) is in contact with and/or fixed with the collecting tray (10).
3. Cylindrical battery according to claim 2, characterized in that a transition (122) is provided between the outer ring (121) and the inner ring (123).
4. The cylindrical battery according to claim 2, wherein the inner ring is further provided with a second surface (123 b), the second surface (123 b) being arranged opposite to the first surface (123 a), the second surface (123 b) being in contact with and/or fixed to the cap assembly (20).
5. The cylindrical battery according to claim 2, wherein the outer ring (121) and the inner ring (123) are not uniform in height in the axial direction thereof, the inner ring (123) being disposed close to the electric cell (31).
6. The cylindrical battery according to claim 1, wherein the fixing ring (12) is provided with at least two limiting protrusions (124), the current collecting disc (10) is provided with limiting grooves (103), and the limiting grooves (103) are arranged in one-to-one correspondence with the limiting protrusions (124); or,
at least two limit protrusions (124) are arranged on the collecting disc (10), limit grooves (103) are formed in the fixing ring (12), and the limit grooves (103) and the limit protrusions (124) are arranged in one-to-one correspondence.
7. Cylindrical battery according to claim 1, characterized in that the fixing ring (12) is integrally formed with the current collecting plate (10).
8. A method of assembling a cylindrical battery, comprising the steps of:
obtaining a conductive assembly, wherein the conductive assembly comprises a fixed ring (12) and a current collecting disc (10);
-fixing the fixing ring (12) to the collecting tray (10);
the battery cell (31) is arranged in a shell (30) of the battery, and the fixing ring (12) and the shell (30) are fixed so that the current collecting disc (10) is abutted against a lug layer (40) at the end part of the battery cell (31);
fixing the collector plate (10) and a tab layer (40) contacted with the collector plate;
-obtaining a cap assembly (20), -fixing said cap assembly (20) with said fixing ring (12).
9. A method of assembling a cylindrical battery, comprising the steps of:
acquiring a conductive assembly, wherein the conductive assembly comprises a fixed ring (12) and a current collecting disc (10), and the fixed ring (12) and the current collecting disc (10) are integrally formed;
the battery cell (31) is arranged in a shell (30) of the battery, and the fixing ring (12) and the shell (30) are fixed so that the current collecting disc (10) is abutted against a lug layer (40) at the end part of the battery cell (31);
fixing the collector plate (10) and a tab layer (40) contacted with the collector plate;
-obtaining a cap assembly (20), fixing the cap assembly (20) with the fixing ring (12).
10. A method of assembling a cylindrical battery, comprising the steps of:
acquiring a battery cell (31), wherein both ends of the battery cell (31) are respectively provided with a positive lug layer (401) and a negative lug layer (402);
fixing the positive current collecting disc (101) with the positive electrode lug layer (401), and fixing the negative current collecting disc (102) with the fixing ring (12);
the battery cell (31) is arranged in the shell (30), and the fixing ring (12) is fixed with the shell (30) so that the negative current collecting disc (102) is pressed against the negative electrode lug layer (402);
fixing the negative current collecting disc (102) with the negative electrode lug layer (402);
and acquiring the cap assembly (20), and fixing the cap assembly (20) with the fixing ring (12).
11. A powered device comprising a cylindrical battery as claimed in any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310565891.4A CN116314847B (en) | 2023-05-19 | 2023-05-19 | Cylindrical battery, assembly method and electric equipment |
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| CN202310565891.4A CN116314847B (en) | 2023-05-19 | 2023-05-19 | Cylindrical battery, assembly method and electric equipment |
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| CN116314847B true CN116314847B (en) | 2023-08-04 |
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| CN114709530A (en) * | 2022-04-20 | 2022-07-05 | 广东国光电子有限公司 | Soft-packaged full-lug cylindrical battery core |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114709530A (en) * | 2022-04-20 | 2022-07-05 | 广东国光电子有限公司 | Soft-packaged full-lug cylindrical battery core |
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Address after: No. 68, Xin'anjiang Road, Southeast Street, Changshu City, Suzhou City, Jiangsu Province, 215000 Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: No. 68, Xin'anjiang Road, Southeast Street, Changshu City, Suzhou City, Jiangsu Province, 215000 Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |
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