Battery with positive electrode and negative electrode on same side and welding structure
By designing the battery structure on the same side of the positive and negative electrodes, and using the design of the insulating layer and annular groove, the welding of the positive and negative electrodes at the same end is realized, solving the problems of complex welding and low production efficiency in the existing battery structure, and improving welding production efficiency.
Patent Information
- Application Number
- CN202323267806.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-01
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2033-12-01
AI Technical Summary
In the existing battery structure, the positive electrode and the negative electrode are respectively drawn from both ends of the cylindrical electrode assembly, resulting in complex welding process, increasing assembly process and process difficulty, and low production efficiency.
Design a battery structure on the same side of the positive and negative electrodes. By opening a blind hole and annular groove on the shell, one end of the roll core extends the positive and negative electrode ears. The cap assembly includes rivets, cover plates and insulating rings, using insulation The design of the layer and annular groove realizes welding of the positive and negative electrodes at the same end.
The welding process of the battery pack is simplified, the processing surface is reduced, the production efficiency is improved, and the risk of short circuit of the positive and negative electrodes is avoided.
Smart Images
Figure CN222463341U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of battery structures, in particular to a battery with positive and negative electrodes on the same side and a welding structure. Background Art
[0002] A battery is a device that contains an electrolyte solution and electrodes with metal foil in a container to generate electric current. It can convert chemical energy into electrical energy. With the advancement of science and technology, batteries are increasingly used in life due to their simple structure, easy portability, and convenient charging and discharging. They are currently mainly used in aerospace, transportation, lighting systems, electronic products, power storage and other fields.
[0003] Among the existing battery types, the battery using a full-pole tab core has the characteristics of higher output power and faster charging speed; the above-mentioned battery includes a shell, two cap assemblies and a core, the two cap assemblies are respectively provided with a positive electrode column and a negative electrode column, the core is placed in the shell, and the two cap assemblies are respectively covered at both ends of the shell to seal the core in the shell, the positive and negative pole tabs of the core are respectively electrically connected to the positive and negative electrode columns, and the shell is filled with electrolyte, which is used to provide a carrier for the transmission of ions when the battery is charged and discharged.
[0004] Most existing cylindrical lithium battery structures use the positive and negative electrodes to lead out from the two ends of the cylindrical electrode assembly respectively, which results in different processing schemes and different processing equipment being required when the positive and negative electrodes are welded to the two ends of the winding core, resulting in an increase in assembly steps, increased process difficulty and increased manufacturing costs; and, when multiple of the above batteries are welded into a battery pack, wires need to be welded to the two ends of the battery pack respectively, which increases the processing steps of the battery pack and reduces production efficiency. Utility Model Content
[0005] The utility model aims to provide a battery and welding structure with positive and negative electrodes on the same side, improve the battery structure, make the positive and negative electrodes both located at one end of the battery, and lead out the positive and negative electrodes at the same end of the battery pack, thereby improving production efficiency.
[0006] The technical solution adopted by a battery and a welding structure with positive and negative electrodes on the same side disclosed in the utility model is:
[0007] It includes an outer shell, a winding core and a cap assembly, wherein a blind hole is provided on the outer shell, an annular groove is provided on the inner wall of the blind hole, the annular groove is close to the opening of the blind hole, the winding core is placed in the blind hole, a positive pole ear and a negative pole ear are extended from one end of the winding core, the cap assembly includes a rivet, a cover plate and an insulating ring, the rivet is covered with an insulating layer, both ends of the insulating layer are provided with notches, the rivet is inserted into the cover plate, the insulating layer is located between the rivet and the cover plate, the cover plate is inserted into the insulating ring, the insulating ring is inserted into the annular groove, the positive pole ear is connected to the rivet, and the negative pole ear is connected to the cover plate.
[0008] As a preferred solution, an annular mounting groove is provided on the outer side of the rivet, and the inner wall of the cover plate is inserted into the mounting groove.
[0009] As a preferred embodiment, a positive current collecting plate and a negative current collecting plate are provided in the blind hole, there are multiple positive pole ears, and the multiple positive pole ears are electrically connected to the positive current collecting plate, the positive current collecting plate is electrically connected to the rivet near one of the notches, there are multiple negative pole ears, and the multiple negative pole ears are electrically connected to the negative current collecting plate, and the negative current collecting plate is electrically connected to the cover plate.
[0010] As a preferred solution, a limiting ring extends from the insulating ring, the limiting ring is snapped into the edge of the annular groove, a sink groove is opened on the insulating ring, the sink groove is away from the limiting ring, and the outer side of the cover plate is snapped into the sink groove.
[0011] As a preferred solution, an annular protrusion extends from the cover plate, the outer side of the annular protrusion is clamped with the inner side of the insulating ring, and the outer side of the rivet is clamped into the inner side of the annular protrusion.
[0012] As a preferred solution, a through groove is provided on the annular protrusion.
[0013] As a preferred embodiment, it includes multiple batteries, positive electrode connecting plates and negative electrode connecting plates, and multiple batteries are arranged at intervals to form a power group. The rivets of the batteries are electrically connected to the cover plates of adjacent batteries, the positive electrode connecting plates are electrically connected to the rivets at the front end of the power group, and the negative electrode connecting plates are electrically connected to the cover plates at the end of the power group.
[0014] As a preferred solution, a relay connecting piece is provided between the rivet of the battery and the cover plate of the adjacent battery, and two ends of the relay connecting piece are electrically connected to the adjacent rivet and cover plate respectively.
[0015] As a preferred solution, there are multiple power supply groups.
[0016] The utility model discloses a battery with positive and negative electrodes on the same side and a welding structure with beneficial effects as follows:
[0017] By wrapping an insulating layer on the outside of the rivet, notches are provided at both ends of the insulating layer, so that the positive pole ear can be connected to the rivet through one of the notches, and the external positive wire can be connected to the rivet through the other notch; the rivet is inserted into the cover plate, and the insulating layer is located between the rivet and the cover plate, so that when the rivet and the cover plate are on the same side, the insulating layer isolates the current on the rivet from the cover plate, and the cover plate is inserted into the insulating ring, and the insulating ring is inserted into the annular groove of the outer shell. The insulating ring isolates the contact between the cover plate and the outer shell to avoid the cover plate and the outer shell from conducting current, so as to realize that the positive and negative electrodes are set at the same end of the battery. Multiple batteries are arranged at intervals to form a power supply group. Since the positive and negative electrodes of the batteries are located on the same end face, workers can perform welding processing on the same end face of the power supply group, and the rivets of the batteries in the power supply group are electrically connected to the cover plates of the adjacent batteries, so as to reduce the processing surface of one power supply group, thereby improving welding production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The utility model is a structural schematic diagram of a battery with positive and negative electrodes on the same side and a welding structure.
[0019] Figure 2 The utility model is a schematic diagram of the installation of a battery with positive and negative electrodes on the same side and a cap assembly of a welding structure.
[0020] Figure 3 The utility model is a rivet cross-sectional view of a battery with positive and negative electrodes on the same side and a welding structure.
[0021] Figure 4 It is a partial cross-sectional view of a battery and a welding structure with positive and negative electrodes on the same side of the utility model.
[0022] Figure 5 The utility model is a battery with positive and negative electrodes on the same side and a welding structure Figure 4 (A area) Enlarged image.
[0023] Figure 6 The utility model is a battery with positive and negative electrodes on the same side and a welding structure Figure 4 (Area B) Enlarged image.
[0024] Figure 7 The utility model is a schematic diagram of a welding structure of a power supply group of a battery and a welding structure with positive and negative electrodes on the same side. DETAILED DESCRIPTION
[0025] The present invention is further described and illustrated below in conjunction with specific embodiments and accompanying drawings:
[0026] Please refer to Figure 1 .
[0027] The utility model discloses a battery with positive and negative electrodes on the same side and a welding structure, comprising a shell 1, a winding core 11 and a cap assembly 2.
[0028] In this embodiment, the shell 1 is preferably cylindrical; a blind hole is provided on the shell 1, and the opening of the blind hole is located on the plane of one end of the shell 1; an annular groove is provided on the inner wall of the blind hole, and in this embodiment, the annular groove is preferably formed by stamping on the inner wall of the shell 1, and the annular groove is close to the opening of the blind hole, and the center of the annular groove is located at the center of the shell 1. The winding core 11 is placed in the blind hole, and the winding core 11 is installed and placed in the shell 1 through the opening of the blind hole. A positive electrode tab 111 and a negative electrode tab 112 extend from one end of the winding core 11. In this embodiment, the positive electrode tab 111 is preferably multiple, and the negative electrode tab 112 is preferably multiple; the positive electrode tab 111 and the negative electrode tab 112 are both close to the opening of the blind hole, and the positive electrode tab 111 and the negative electrode tab 112 do not contact each other.
[0029] A positive current collecting disc and a negative current collecting disc are arranged in the blind hole, and one end of the positive current collecting disc is electrically connected to a plurality of positive electrode tabs 111 , and one end of the negative current collecting disc is electrically connected to a plurality of negative electrode tabs 112 .
[0030] Please refer to Figure 2 .
[0031] The cap assembly 2 is covered at the opening of the blind hole, and the cap assembly 2 limits the winding core 11, the positive collecting disc and the negative collecting disc in the housing 1; the cap assembly 2 includes a rivet 21, a cover plate 23 and an insulating ring 24.
[0032] Please refer to Figure 1-Figure 6 .
[0033] In this embodiment, the rivet 21 is preferably circular, and an annular mounting groove 211 is provided on the outer side of the rivet 21. The mounting groove 211 makes the cross-section of the rivet 21 form an I-shape. The mounting groove 211 separates the two ends of the rivet 21 into a first contact portion and a second contact portion respectively. The diameter of the first contact portion is larger than that of the second contact portion. The rivet 21 is covered with an insulating layer 22. Notches 221 are provided at both ends of the insulating layer 22. The first contact portion and the second contact portion of the rivet 21 are respectively exposed at the adjacent notches 221.
[0034] In this embodiment, the cover plate 23 is preferably a circular ring structure, and the rivet 21 is inserted into the cover plate 23; the inner side of the cover plate 23 is inserted into the annular mounting groove 211, and the rivet 21 is firmly clamped on the cover plate 23 through the mounting groove 211; an annular protrusion 231 extends from one end of the cover plate 23, and a through groove 232 is opened on the annular protrusion 231. In this embodiment, the two groove walls of the through groove 232 are preferably formed at an angle of 30°-330° with the center of the cover plate 23 as a circle; the outer side of the first contact portion of the rivet 21 is inserted into the inner side of the annular protrusion 231, further strengthening the firmness of the rivet 21 clamped on the cover plate 23, and the insulating layer 22 is located between the rivet 21 and the cover plate 23. The insulating layer 22 isolates the contact between the rivet 21 and the cover plate 23, thereby preventing the current on the rivet 21 from being directed to the cover plate 23, and solving the problem of short circuit when the positive and negative electrodes are located at the same end of the battery.
[0035] In this embodiment, the insulating ring 24 is preferably a circular ring structure, and the cover plate 23 is inserted into the insulating ring 24. A limit ring 241 is extended from one end of the insulating ring 24, and the limit ring 241 forms a step on the insulating ring 24. The diameter of the limit ring 241 is smaller than the diameter of the insulating ring 24, and the center of the limit ring 241 is located at the center of the insulating ring 24. A sink groove 242 is provided at the other end of the insulating ring 24, and the sink groove 242 is far away from the limit ring 241. In this embodiment, the sink groove 242 is preferably a ring structure, and the center of the sink groove 242 is located at the center of the insulating ring 24. The outer side of the annular protrusion 231 is clamped onto the inner side of the insulating ring 24, and the outer side of the cover plate 23 is clamped into the inner wall of the recessed groove 242, so that the cover plate 23 is sunken into the recessed groove 242; the cover plate 23 is clamped onto the insulating ring 24 through the recessed groove 242, thereby strengthening the firmness of the cover plate 23 clamped onto the insulating ring 24, and the insulating ring 24 can isolate the cover plate 23 from contact with the outer shell 1.
[0036] The outer side of the insulating ring 24 is inserted into the annular groove, so that the cap assembly 2 is covered at the opening of the blind hole. The outer side of the limiting ring 241 is inserted into the edge of the annular groove to increase the firmness of the insulating ring 24 on the outer shell 1, and improve the sealing of the cap assembly 2 on the blind hole on the outer shell 1; the positive collecting plate is electrically connected to the second contact part of the rivet 21 near one of the notches 221, and the negative collecting plate is electrically connected to the cover plate 23.
[0037] This embodiment provides a battery welding method of the above improved structure, and the above improved structure has multiple batteries, and the multiple batteries are arranged in a staggered manner to form a power supply group, and the rivet 21 of the battery is electrically connected to the cover plate 23 of the adjacent battery; in this embodiment, preferably, a relay connecting piece 31 is provided between the rivet 21 of the battery and the cover plate 23 of the adjacent battery, and the relay connecting piece 31 is close to the top of the through groove 232, and the two ends of the relay connecting piece 31 are electrically connected to the adjacent rivet 21 and the cover plate 23 respectively, and multiple relay connecting pieces 31 connect the batteries in the entire power supply group in series, and the annular protrusion 231 can facilitate workers to weld the relay connecting piece 31. The positive connecting piece 32 is electrically connected to the rivet 21 of the battery at the head end of the power supply group, and the negative connecting piece 33 is electrically connected to the cover plate 23 of the battery at the end of the power supply group. The positive connecting piece 32 and the negative connecting piece 33 are used to connect external electrical equipment; in this embodiment, preferably, there are multiple power supply groups, and multiple power supply groups are connected in parallel through the positive connecting piece 32 and the negative connecting piece 33.
[0038] Please refer to Figure 7 .
[0039] By combining multiple batteries with the above-mentioned improved structures into a power pack, since the positive and negative poles of the batteries are located at the same end, workers can operate on one end of the power pack when welding the relay connecting plate, the positive connecting plate and the negative connecting plate, thereby reducing the working surface during welding and improving the efficiency of welding production.
[0040] The utility model provides a battery and welding structure with positive and negative electrodes on the same side, by wrapping an insulating layer on the outside of a rivet, with notches at both ends of the insulating layer, so that the positive electrode ear can be connected to the rivet through one of the notches, and the external positive electrode wire can be connected to the rivet through the other notch; the rivet is inserted into the cover plate, and the insulating layer is located between the rivet and the cover plate, so that when the rivet and the cover plate are located on the same side, the insulating layer isolates the current on the rivet from the cover plate, the cover plate is inserted into the insulating ring, and the insulating ring is inserted into the annular groove of the shell, and the insulating ring isolates the contact between the cover plate and the shell, avoiding the cover plate and the shell from conducting current, so as to realize that the positive and negative electrodes are set at the same end of the battery. Multiple batteries are arranged at intervals to form a power supply group. Since the positive and negative electrodes of the batteries are located on the same end face, workers can perform welding processing on the same end face of the power supply group, and the rivets of the batteries in the power supply group are electrically connected to the cover plates of the adjacent batteries, so as to reduce the processing surface of one power supply group, thereby improving welding production efficiency.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.
Claims
1. A battery with positive and negative electrodes on the same side, characterized in that: Includes a housing, a winding core and a cap assembly; The shell is provided with a blind hole, the inner wall of the blind hole is provided with an annular groove, the annular groove is close to the opening of the blind hole, the winding core is placed in the blind hole, and one end of the winding core is extended with a positive electrode tab and a negative electrode tab; The cap assembly includes a rivet, a cover plate and an insulating ring, the rivet is covered with an insulating layer, both ends of the insulating layer are provided with notches, the rivet is inserted into the cover plate, the insulating layer is located between the rivet and the cover plate, the cover plate is inserted into the insulating ring, the insulating ring is inserted into the annular groove, the positive pole ear is connected to the rivet, and the negative pole ear is connected to the cover plate.
2. A battery with positive and negative electrodes on the same side as claimed in claim 1, characterized in that: An annular mounting groove is provided on the outer side of the rivet, and the inner wall of the cover plate is inserted into the mounting groove.
3. A battery with positive and negative electrodes on the same side as claimed in claim 2, characterized in that: A positive current collecting plate and a negative current collecting plate are provided in the blind hole, there are multiple positive pole ears, and the multiple positive pole ears are electrically connected to the positive current collecting plate, and the positive current collecting plate is electrically connected to the rivet near one of the notches, there are multiple negative pole ears, and the multiple negative pole ears are electrically connected to the negative current collecting plate, and the negative current collecting plate is electrically connected to the cover plate.
4. A battery with positive and negative electrodes on the same side as claimed in claim 3, characterized in that: A limiting ring extends from the insulating ring, and the limiting ring is clamped into the edge of the annular groove. A sink groove is provided on the insulating ring, and the sink groove is far away from the limiting ring. The outer side of the cover plate is clamped into the sink groove.
5. A battery with positive and negative electrodes on the same side as claimed in claim 4, characterized in that: An annular protrusion extends from the cover plate, the outer side of the annular protrusion is clamped with the inner side of the insulating ring, and the outer side of the rivet is clamped into the inner side of the annular protrusion.
6. A battery with positive and negative electrodes on the same side as claimed in claim 5, characterized in that: A through groove is formed on the annular protrusion.
7. A welding structure with positive and negative electrodes on the same side, characterized in that: It comprises a plurality of batteries, positive electrode connecting plates and negative electrode connecting plates as described in any one of claims 1 to 6, wherein the plurality of batteries are arranged at intervals to form a power group, the rivets of the batteries are electrically connected to the cover plates of adjacent batteries, the positive electrode connecting plates are electrically connected to the rivets at the front end of the power group, and the negative electrode connecting plates are electrically connected to the cover plates at the end of the power group.
8. A welding structure with positive and negative electrodes on the same side as claimed in claim 7, characterized in that: A relay connecting piece is provided between the rivet of the battery and the cover plate of the adjacent battery, and two ends of the relay connecting piece are electrically connected to the adjacent rivet and the cover plate respectively.
9. A welding structure with positive and negative electrodes on the same side as claimed in claim 8, characterized in that: There are multiple power supply groups.