Positive and negative electrode same-side battery structure and manufacturing method thereof

Abstract

The invention discloses a battery structure with a positive electrode and a negative electrode on the same side and a manufacturing method thereof.The battery structure comprises a shell, a roll core, a combined collector plate, a combined cover plate and the like, a positive electrode lug and a negative electrode lug which are arranged on the same side are arranged at one end of the roll core, and a positive electrode collector piece and a negative electrode collector piece which are insulated from each other are arranged on the combined collector plate; the combined cover plate is provided with a positive current collecting column and a negative current collecting column which are mutually insulated; therefore, only the combined current collecting disc needs to be installed at one end of the roll core provided with the positive pole lug and the negative pole lug, the combined cover plate is installed on the combined current collecting disc, the positive pole lug, the positive pole current collecting piece and the positive pole current collecting column are sequentially welded and conducted to lead out positive current, and the negative pole lug, the negative pole current collecting piece and the negative pole current collecting column are sequentially welded and conducted to lead out negative current. And then the roll core and the combined collector plate are arranged in the shell from the port of the shell and are covered and sealed by the combined cover plate to finish the assembly, so that the battery has the use advantages of simple structure and convenience in assembly, and the automatic production and manufacturing of the battery are greatly facilitated by combining with a corresponding manufacturing method.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and particularly to a battery structure with positive and negative electrodes on the same side and a manufacturing method thereof. Background Art

[0002] The existing batteries with positive and negative electrodes on the same side mainly refer to that the positive electrode tab and the negative electrode tab are arranged at the same end of the core to form the same side. However, when components such as the core, the current collector plate, and the cover plate are successively installed into the outer shell, the positive electrode tab of the core will be welded and conduct electricity with the positive current collector column at one end of the outer shell to lead out the positive current, but the negative electrode tab of the core is still welded to the outer shell and the negative current is led out at the other end of the outer shell. Therefore, in actual use, the manufactured battery still needs to lead out the positive and negative currents from the two ends of the outer shell respectively, and cannot lead out the positive and negative currents at the same end of the outer shell, which brings certain limitations to the use in some special occasions; at the same time, the existing battery structure has a large number of components. In addition to the necessary core, current collector plate, and cover plate, positive and negative current collector sheets and a plurality of insulating components for spacing and preventing internal short circuits are also required. The positive and negative current collector sheets and various insulating components need to be installed separately, which will lead to the complexity of the battery structure and make the battery assembly process more troublesome, thus being not conducive to the automated production and manufacturing of the battery; in addition, the positive current collector sheet and the positive current collector column, and the negative current collector sheet and the outer shell are usually welded to form conduction, but the direct welding between the two belongs to a hard connection. Therefore, when the battery is in a vibrating working condition, the welding point at this place is likely to fall off, which greatly affects the use reliability of the battery. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a battery structure with positive and negative electrodes on the same side and a manufacturing method thereof, which have a simple structure, convenient assembly, reliable use, and are convenient for automated production and manufacturing.

[0004] The technical problem of the present invention is realized through the following technical solutions: A battery structure with the positive and negative electrodes on the same side, comprising a housing, a wound core, a combined current collector plate, and a combined cover plate. One end of the wound core is provided with a positive electrode tab and a negative electrode tab arranged on the same side. The combined current collector plate is provided with a positive current collector sheet and a negative current collector sheet, and the positive and negative current collector sheets are insulated from each other. The combined cover plate is provided with a positive current collector post and a negative current collector post, and the positive and negative current collector posts are insulated from each other. The combined current collector plate is installed at one end of the wound core provided with the positive and negative electrode tabs, the combined cover plate is installed on the combined current collector plate, and both the wound core and the combined current collector plate are inserted into the housing through the port of the housing and sealed by the combined cover plate. The positive electrode tab, the positive current collector sheet, and the positive current collector post are electrically connected in sequence to lead out the positive current. The negative electrode tab, the negative current collector sheet, and the negative current collector post are electrically connected in sequence to lead out the negative current.

[0005] The combined current collector plate includes a disc-shaped body, and the body is provided with a liquid inlet hole and two installation notches symmetrically arranged with the axis of the wound core as the center. The positive current collector sheet and the negative current collector sheet are respectively positioned and installed in the two installation notches.

[0006] The positive current collector sheet includes a positive electrode body positioned and installed in one of the installation notches, and a positive electrode section with one end connected to the positive electrode body and the other end suspended and extending on the body. The negative current collector sheet includes a negative electrode body positioned and installed in the other installation notch, and a negative electrode section with one end connected to the negative electrode body and the other end suspended and extending on the body.

[0007] Both the positive electrode section and the negative electrode section are arc-shaped sections, and the positive and negative electrode sections enclose a circle with the axis of the wound core as the center, and the positive and negative electrode sections do not contact each other.

[0008] The positive electrode body is provided with a positive electrode elastic sheet formed by hollowing out through a cutting groove, and one end of the positive electrode section is fixed on the positive electrode elastic sheet to form an elastic connection. The negative electrode body is provided with a negative electrode elastic sheet formed by hollowing out through a cutting groove, and one end of the negative electrode section is fixed on the negative electrode elastic sheet to form an elastic connection.

[0009] The combined cover plate includes a disc-shaped cover body, and the cover body is provided with a liquid injection hole, a positive current collector post, a negative current collector post, and an explosion-proof valve. The liquid injection hole is provided with an openable and closable seal cover.

[0010] The inner surface of the cover body is respectively provided with a positive electrode connection sheet electrically connected to the positive current collector post and a negative electrode connection sheet electrically connected to the negative current collector post. The combined cover plate is installed on the combined current collector plate, and the positive electrode connection sheet is electrically connected to the positive current collector sheet at the same time, and the negative electrode connection sheet is electrically connected to the negative current collector sheet at the same time.

[0011] One end of the positive connection piece is provided with a positive connection hole for sleeving and connecting the positive current collector post, and the other end of the positive connection piece is provided with an arc-shaped positive bending section; one end of the negative connection piece is provided with a negative connection hole for sleeving and connecting the negative current collector post, and the other end of the negative connection piece is provided with an arc-shaped negative bending section.

[0012] The inner surface of the cover body is provided with an insulating ring concentrically installed with the axis of the core. The positive bending section and the negative bending section are circularly enclosed outside the insulating ring, and the positive and negative bending sections do not contact each other.

[0013] A manufacturing method of a battery structure with positive and negative electrodes on the same side includes the following steps: Step 1: Manufacture the core, the combined current collector plate and the combined cover plate Manufacture the core ① Cut out a plurality of positive electrode tabs along the length direction on the long side of the positive electrode plate, and cut out a plurality of negative electrode tabs along the length direction on the long side of the negative electrode plate; ② Stack and wind the positive electrode plate, the negative electrode plate and the separator paper into a core, so that the positive and negative electrode tabs are located at the same end of the core; ③ Upset and flatten a plurality of positive electrode tabs located at the same end of the core, and also upset and flatten a plurality of negative electrode tabs; Manufacture the combined current collector plate ① The positive electrode body of the positive current collector piece is positioned and installed in one of the installation notches of the plate body by a three-point positioning method, and the negative electrode body of the negative current collector piece is positioned and installed in the other installation notch of the plate body by a three-point positioning method; ② One end of the positive electrode section is elastically connected to the positive electrode elastic piece of the positive electrode body, the other end of the positive electrode section is suspended and extends on the plate body, one end of the negative electrode section is elastically connected to the negative electrode elastic piece of the negative electrode body, the other end of the negative electrode section is suspended and extends on the plate body, and the positive and negative electrode sections are circularly enclosed with the axis of the core as the center, and the positive and negative electrode sections do not contact each other and are insulated from each other; Manufacture the combined cover plate ① The cover body is provided with a liquid injection hole, a positive current collector post, a negative current collector post and an explosion-proof valve; ② The inner surface of the cover body is provided with a positive connection piece, a negative connection piece, and an insulating ring concentrically installed with the axis of the core. One end of the positive connection piece is sleeved and connected to the positive current collector post through the positive connection hole to form conduction, the other end of the positive connection piece is provided with an arc-shaped positive bending section, one end of the negative connection piece is sleeved and connected to the negative current collector post through the negative connection hole to form conduction, and the other end of the negative connection piece is provided with an arc-shaped negative bending section; ③ The positive bending section and the negative bending section are circularly enclosed outside the insulating ring, and the positive and negative bending sections do not contact each other and are insulated from each other; Step 2: Installation between the combined current collector plate and the core Install the combined current collector plate at one end of the core on the same side as the positive and negative pole tabs, and weld and fix the positive pole tab at one end of the core to the positive current collector plate of the combined current collector plate to form an electrical connection, and weld and fix the negative pole tab to the negative current collector plate of the combined current collector plate to form an electrical connection; Step 3: Installation between the combined cover plate and the combined current collector plate ① Install the combined cover plate on the combined current collector plate. Through the unique design that both the positive pole section and the negative pole section are arc-shaped sections, the circle formed by enclosing the positive pole section and the negative pole section is exactly sleeved outside the circle formed by enclosing the positive and negative pole bending sections, and the positive pole section just contacts the positive pole bending section, and the negative pole section just contacts the negative pole bending section. There is no contact and they are insulated from each other between the positive pole section, the positive pole bending section and the negative pole section, the negative pole bending section; ② Weld and fix the mutually contacting positive pole section and the positive pole bending section to form an electrical connection, and weld and fix the mutually contacting negative pole section and the negative pole bending section to form an electrical connection; Step 4: Assembly of the core, combined current collector plate, combined cover plate and the housing Sequentially insert the welded and assembled core, combined current collector plate and combined cover plate into the housing from the port of the housing, and the combined cover plate is circumferentially welded to seal the port; Step 5: Liquid injection and hole sealing After sequentially injecting the electrolyte into the core through the liquid injection hole and the liquid inlet hole, seal the liquid injection hole with a sealing cover to complete the battery manufacturing.

[0014] Compared with the prior art, the present invention mainly has a positive electrode tab and a negative electrode tab arranged on the same side at one end of the core. The combined current collector plate is provided with a positive current collector sheet and a negative current collector sheet, and the positive and negative current collector sheets are insulated from each other. The combined cover plate is provided with a positive current collector post and a negative current collector post, and the positive and negative current collector posts are insulated from each other. In this way, only need to install the combined current collector plate at one end of the core provided with the positive and negative electrode tabs, and weld the positive electrode tab to the positive current collector sheet for conduction, weld the negative electrode tab to the negative current collector sheet for conduction, then install the combined cover plate on the combined current collector plate, and weld the positive current collector sheet to the positive current collector post for conduction, weld the negative current collector sheet to the negative current collector post for conduction. Then, both the core and the combined current collector plate are inserted into the housing through the port of the housing, and then the port is covered and sealed by the combined cover plate to complete the assembly. At this time, the positive electrode tab, the positive current collector sheet and the positive current collector post are conductively connected in sequence to lead out the positive current, and the negative electrode tab, the negative current collector sheet and the negative current collector post are conductively connected in sequence to lead out the negative current. Obviously, after directly simplifying the numerous components in the traditional battery structure into the housing, the core, the combined current collector plate and the combined cover plate, the structure is simpler and the assembly is more convenient. Especially, the positive current collector post and the negative current collector post are creatively designed at the same end of the battery, and it can lead out the positive and negative currents at the same end of the battery through the positive and negative current collector posts, so as to meet the use needs of some special occasions. Moreover, the improved positive and negative same-side battery structure combined with the corresponding manufacturing method also greatly facilitates the automated production and manufacturing of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a cross-sectional view of the present invention.

[0016] Figure 2 is Figure 1 a three-dimensional cross-sectional view of the battery head in

[0017] Figure 3 is Figure 1 the top view of

[0018] Figure 4 a schematic structural view of the combined current collector plate.

[0019] Figure 5 is Figure 4 the three-dimensional view of

[0020] Figure 6 is Figure 4 the rear view of

[0021] Figure 7 is Figure 6 the three-dimensional view of

[0022] Figure 8 a schematic structural view of the disk body.

[0023] Figure 9 isFigure 8 Stereogram.

[0024] Figure 10 It is a schematic structural diagram of the positive current collector.

[0025] Figure 11 is Figure 10 Stereogram.

[0026] Figure 12 It is a schematic structural diagram of the combined cover plate.

[0027] Figure 13 is Figure 12 A - A cross-sectional view of (with the cover removed).

[0028] Figure 14 is Figure 12 Stereogram.

[0029] Figure 15 is Figure 13 Rear view of .

[0030] Figure 16 is Figure 15 Stereogram.

[0031] Figure 17 It is a schematic diagram of the unfolded structure of the core roll. Specific embodiments

[0032] The embodiments of the present invention will be further described in detail below with reference to the above drawings.

[0033] As Figures 1 to 17 shown, 1. Outer shell, 2. Core roll, 21. Separator paper, 22. Negative electrode plate, 221. Negative electrode tab, 23. Positive electrode plate, 231. Positive electrode tab, 3. Combined current collector plate, 31. Plate body, 311. Liquid inlet hole, 312. Installation notch, 313. Protrusion, 32. Positive current collector, 321. Positive body, 322. Positive segment, 323. Positive elastic piece, 33. Negative current collector, 331. Negative body, 332. Negative segment, 333. Negative elastic piece, 34. Cutting groove, 35. Installation table, 36. Small hole, 4. Combined cover plate, 41. Cover body, 411. Liquid injection hole, 42. Positive current collector column, 43. Negative current collector column, 44. Cover, 45. Explosion-proof valve, 46. Positive connection piece, 461. Positive connection hole, 462. Positive bending segment, 47. Negative connection piece, 471. Negative connection hole, 472. Negative bending segment, 48. Insulating ring.

[0034] A battery structure with positive and negative electrodes on the same side and its manufacturing method can be widely applied to the production and manufacturing of lithium batteries or sodium batteries. The battery structure is as Figures 1 to 3As shown in the figure, it is mainly composed of a housing 1, a core 2, a combined current collector plate 3, a combined cover plate 4, etc. The housing 1 is a cylindrical shell with one end closed and a port at the other end.

[0035] One end of the core 2 is provided with a positive electrode tab 231 and a negative electrode tab 221 arranged on the same side, that is, the positive electrode tab and the negative electrode tab are arranged at the same end of the core 2. The core in this embodiment is as Figure 17 shown. First, a plurality of positive electrode tabs 231 are sequentially cut out along the length direction on the long side of a rectangular positive electrode plate 23, and a plurality of negative electrode tabs 221 are sequentially cut out along the length direction on the long side of a rectangular negative electrode plate 22. Then, the separator paper 21, the negative electrode plate 23, the separator paper 21, and the positive electrode plate 22 are sequentially laminated, and the positive electrode tab and the negative electrode tab are located on the same side. Then, it is wound into a cylindrical core 2 in such a way that the positive electrode plate 22 is on the inner side of the winding and the outermost separator paper 21 is on the outer side of the winding. At this time, only the positive electrode tab 231 and the negative electrode tab 221 located at the same end of the core need to be flattened by upsetting respectively.

[0036] The combined current collector plate 3 is as Figures 4 to 7 shown, including a disc-shaped body 31. The body is made of an insulating material, such as plastic, ceramic, etc. with insulating properties. The body 31 is provided with a liquid inlet hole 311 and two mounting notches 312. The liquid inlet hole 311 is exactly located at the center of the body 31, and the center of the liquid inlet hole coincides with the axis of the core. The two mounting notches 312 are symmetrically arranged with the axis of the core, that is, with the liquid inlet hole 311 as the center. A positive current collector plate 32 and a negative current collector plate 33 for positioning and mounting are respectively provided in the two mounting notches. The two mounting notches 312 in this embodiment are as Figure 8 shown in a fan shape, and the corresponding positive current collector plate 32 and negative current collector plate 33 are both fan-shaped pieces.

[0037] The positive current collector plate 32 is as Figure 10 、 Figure 11 shown, including a positive electrode body 321 and a positive electrode section 322. The outer shape of the positive electrode body 321 is fan-shaped and exactly matches the shape of the mounting notch 312. Therefore, the positive current collector plate 32 is fitted in the mounting notch 312 through the positive electrode body 321, and then three-point positioning is performed through the two bottom corners of the positive electrode body 321 and the mounting platforms 35 near the central angle to form a fixed installation. There are various ways of this positioning and fixing method. For example, if the body 31 in this embodiment is made of plastic, only the protruding points 313 connected to the body 31 are directly inserted into the small holes 36 on the mounting platform 35 and fixed by plastic heat melting.

[0038] One end of the positive electrode section 322 is connected to the positive electrode body 321. Specifically, a positive electrode elastic piece 323 formed by hollowing through a cutting groove 34 is provided on the positive electrode body, and one end of the positive electrode section 322 is welded and fixed to the positive electrode elastic piece 323 to form an elastic connection. The purpose is to ensure that it is not easily detached even when the battery works in a vibrating environment, thus guaranteeing the reliability of the structural use. In this embodiment, Figure 10 , Figure 11 As shown, the positive electrode elastic piece 323 forms a cantilever beam structure with one end connected and the other end suspended on the positive electrode body 321 through the cutting of the cutting groove 34. Then, one end of the positive electrode section 322 only needs to be welded and fixed to the most elastic suspended end, and the other end of the positive electrode section 322 is suspended and extends on the disk body 31. Of course, there are various design structures for the positive electrode elastic piece 323. Generally, as long as it has an elastic design, it can be applied to the present invention.

[0039] The negative electrode current collector 33 has exactly the same structure and shape as the positive electrode current collector 32, including a negative electrode body 331 positioned and installed in another installation notch 312 on the disk body 31, and a negative electrode section 332 with one end elastically connected to the negative electrode elastic piece 333 on the negative electrode body and the other end suspended and extending on the disk body 31. The negative electrode elastic piece 333 is also formed by hollowing through a cutting groove with the same structural form as the positive electrode elastic piece 323. Therefore, in the present invention, the cutting grooves 34 respectively designed on the positive electrode body 321 and the negative electrode body 331 are all numbered with the same part number.

[0040] At the same time, both the positive electrode section 322 and the negative electrode section 332 are arc-shaped sections, and the positive and negative electrode sections are circularly enclosed with the core axis, that is, the liquid inlet hole 311 as the center. The positive and negative electrode sections need not be in contact with each other to insulate the positive and negative electrode current collectors from each other and avoid short circuits.

[0041] In this way, after combining the disk body 31, the positive electrode current collector 32 and the negative electrode current collector 33, the combined current collector disk 3 forms a combined component. Therefore, during the actual assembly process, the combined current collector disk 3 can be manufactured first for standby.

[0042] The combined cover plate 4 is as Figures 12 to 16 shown, including a circular cover body 41. The cover body is provided with a liquid injection hole 411, a positive electrode current collector post 42 and a negative electrode current collector post 43. The liquid injection hole 411 is exactly located at the center of the cover body 41, and the axis of the liquid injection hole overlaps with the core axis. The positive electrode current collector post 42 and the negative electrode current collector post 43 are symmetrically installed with the core axis, that is, with the liquid injection hole 411 as the center. An explosion-proof valve 45 is also provided to ensure the safety of battery use. A closable seal 44 is provided in the liquid injection hole 411, and the liquid injection hole 411 is closed by the seal 44 after the liquid injection is completed.

[0043] The described positive current collector post 42 and negative current collector post 43 are fitted into the mounting holes on the cover body 41 as Figure 2 shown, and the inner surface of the cover body 31 is respectively provided with a positive connection piece 46 for electrically connecting the positive current collector post 42 and a negative connection piece 47 for electrically connecting the negative current collector post 43. One end of the positive connection piece 46 is sleeved and connected to the positive current collector post 42 through a positive connection hole 461 and welded and fixed. The other end of the positive connection piece 46 is provided with an arc-shaped positive bending section 462; one end of the negative connection piece 47 is sleeved and connected to the negative current collector post 43 through a negative connection hole 471 and welded and fixed. The other end of the negative connection piece 47 is provided with an arc-shaped negative bending section 472.

[0044] Moreover, an insulating ring 48 concentrically installed with the core axis, that is, with the liquid injection hole 411, is also provided on the inner surface of the cover body 41. The insulating ring is made of an insulating material, such as a plastic ring or a ceramic ring with insulating properties, etc.; then, the positive bending section 462 and the negative bending section 472 just surround the insulating ring 48 in a circular shape, and there should be no contact between the positive and negative bending sections, so that the positive and negative connection pieces are insulated from each other to avoid short circuits.

[0045] In this way, after integrating the cover body 41, the positive connection piece 46, the positive current collector post 42, the negative connection piece 47, and the negative current collector post 43, the combined cover plate 4 forms a combined component, so the combined cover plate 4 can also be manufactured and reserved in advance during the actual assembly process.

[0046] The described combined current collector plate 3 is installed at one end of the core 2 provided with positive and negative pole tabs. Then, the positive pole tab 231 is welded to the positive body 321 of the positive current collector plate 3 to form electrical conduction, and the negative pole tab 221 is welded to the negative body 331 of the negative current collector plate 3 to form electrical conduction. Moreover, for the convenience of welding, usually when installing the combined current collector plate 3, the positions of the positive pole tab 231 and the positive body 321, and the negative pole tab 221 and the negative body 331 are corresponding.

[0047] The described combined cover plate 4 is installed on the combined current collector plate 3, and the circle formed by enclosing the positive and negative sections just fits outside the circle formed by enclosing the positive and negative bending sections. Moreover, the positive section 322 just contacts the positive bending section 462, and the negative section 332 just contacts the negative bending section 472. There is no contact and they are insulated from each other between the positive section 322, the positive bending section 462 and the negative section 332, the negative bending section 372; therefore, only by welding and fixing the mutually contacting positive section 322 and the positive bending section 462 from the side can electrical conduction be formed, and welding and fixing the mutually contacting negative section 332 and the negative bending section 472 can also form electrical conduction.

[0048] Therefore, only the core 2 and the combined current collector 3 need to be inserted into the housing 1 from the port of the housing, and then the port can be sealed by the combined cover plate 4 to complete the structural assembly. Then, the positive current can be led out by the sequential electrical connection between the positive electrode tab 231, the positive current collector piece 32, and the positive current collector post 42, and the negative current can also be led out by the sequential electrical connection between the negative electrode tab 221, the negative current collector piece 33, and the negative current collector post 43.

[0049] The manufacturing method of the present invention includes the following steps: Step 1: Manufacture the core, the combined current collector, and the combined cover plate Manufacture the core ① Cut out a plurality of positive electrode tabs 231 along the length direction on the long side of the positive electrode plate 23 in sequence, and cut out a plurality of negative electrode tabs 221 along the length direction on the long side of the negative electrode plate 22 in sequence; ② Stack and wind the positive electrode plate 23, the negative electrode plate 22, and the separator paper 21 into a core 2, so that the positive and negative electrode tabs are located at the same end of the core 2; ③ Upset and flatten a plurality of positive electrode tabs 231 located at the same end of the core 2, and also upset and flatten a plurality of negative electrode tabs 221. The so-called upset and flattening method is different from the traditional winding and cutting and stacking method. Usually, it means using an upsetting head driven by an upsetting machine to flatten a plurality of positive electrode tabs 231 and a plurality of negative electrode tabs 221 at the same end of the core 2. Since it does not belong to the protection scope of the present invention, the upset and flattening method will not be described in detail; Manufacture the combined current collector ① The positive electrode body 321 of the positive current collector piece 32 is positioned and installed in one of the installation slots 312 of the disk body 31 by a three-point positioning method, and the negative electrode body 331 of the negative current collector piece 33 is positioned and installed in another installation slot 312 of the disk body 31 by a three-point positioning method; ② One end of the positive electrode section 322 is elastically connected to the positive electrode elastic piece 323 of the positive electrode body 321, and the other end of the positive electrode section 322 is suspended and extends on the disk body 31. The positive electrode body 321, the positive electrode section 322, and the positive electrode elastic piece 323 can be integrally formed by stamping; one end of the negative electrode section 332 is elastically connected to the negative electrode elastic piece 333 of the negative electrode body 331, and the other end of the negative electrode section 332 is suspended and extends on the disk body 31. The negative electrode body 331, the negative electrode section 332, and the negative electrode elastic piece 333 can also be integrally formed by stamping. Then, the positive and negative electrode sections are circularly enclosed with the core axis as the center, and the positive and negative electrode sections do not contact each other and are insulated from each other; Manufacture the combined cover plate ① The cover body 41 is provided with a liquid injection hole 411, a positive current collector post 42, a negative current collector post 43, and an explosion-proof valve 45; ②On the inner surface of the cover body 41, a positive connection piece 46, a negative connection piece 47, and an insulating ring 48 concentrically installed with the axis of the winding core are provided. One end of the positive connection piece 46 is sleeved and connected to the positive current collector column 42 through the positive connection hole 461 to form an electrical connection. The other end of the positive connection piece 46 is provided with an arc-shaped positive bending section 462. One end of the negative connection piece 47 is sleeved and connected to the negative current collector column 43 through the negative connection hole 471 to form an electrical connection. The other end of the negative connection piece 47 is provided with an arc-shaped negative bending section 472; ③Surround the positive bending section 462 and the negative bending section 472 in a circular shape outside the insulating ring 48, and the positive and negative bending sections are insulated from each other without contact; Step 2: Installation between the combined current collector plate and the winding core Install the combined current collector plate 3 at one end of the winding core 2 with the positive and negative electrode tabs on the same side, and weld and fix the positive electrode tab 231 at one end of the winding core to the positive current collector piece 32 of the combined current collector plate 3 to form an electrical connection, and weld and fix the negative electrode tab 221 to the negative current collector piece 33 of the combined current collector plate 3 to form an electrical connection; Step 3: Installation between the combined cover plate and the combined current collector plate ①Install the combined cover plate 4 on the combined current collector plate 3. Through the unique design that both the positive section 322 and the negative section 332 are arc-shaped sections, the circle formed by enclosing the positive section 322 and the negative section 332 is exactly sleeved outside the circle formed by enclosing the positive and negative bending sections, and the positive section 322 exactly contacts the positive bending section 462, and the negative section 332 exactly contacts the negative bending section 472. The positive section 322, the positive bending section 462, the negative section 332, and the negative bending section 472 are insulated from each other without contact; ②Weld and fix the mutually contacting positive section 322 and positive bending section 462 to form an electrical connection, and weld and fix the mutually contacting negative section 332 and negative bending section 472 to form an electrical connection; Step 4: Assembly of the winding core, combined current collector plate, combined cover plate and the housing Sequentially insert the welded and assembled winding core 2, combined current collector plate 3 and combined cover plate 4 into the housing from the port of the housing 1, and the combined cover plate 4 is circumferentially welded to seal the port; Step 5: Injecting liquid and sealing the hole After sequentially injecting the electrolyte into the winding core through the liquid injection hole and the liquid inlet hole, seal the liquid injection hole with a seal cover to complete the battery manufacturing.

[0050] After simplifying the numerous components in the traditional battery structure directly into the outer shell 1, the wound core 2, the combined current collector plate 3, and the combined cover plate 4, the structure of the present invention is simpler, the assembly is more convenient, the use flexibility can be improved, and the manufacturing cost can be reduced. In particular, the positive current collector post 42 and the negative current collector post 43 are creatively designed at the same end of the battery. It can lead out positive and negative currents simultaneously at the same end of the battery through the positive and negative current collector posts, so as to meet the usage requirements in some special occasions.

[0051] In addition, the improved battery structure with the positive and negative electrodes on the same side combined with the corresponding manufacturing method also greatly facilitates the automated production and manufacturing of the battery, so it has broad market value and economic value.

[0052] The above-described embodiments are only used to illustrate the present invention and not to limit the protection scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present invention.

Claims

1. A battery structure with the positive and negative electrodes on the same side, comprising a housing (1), a wound core (2), a combined current collector plate (3) and a combined cover plate (4), characterized in that, One end of the wound core (2) is provided with a positive electrode tab (231) and a negative electrode tab (221) arranged on the same side; the combined current collector plate (3) is provided with a positive current collector piece (32) and a negative current collector piece (33), and the positive and negative current collector pieces are insulated from each other; the combined cover plate (4) is provided with a positive current collector post (42) and a negative current collector post (43), and the positive and negative current collector posts are insulated from each other; The combined current collector plate (3) is installed at one end of the wound core (2) provided with the positive and negative electrode tabs, the combined cover plate (4) is installed on the combined current collector plate (3), and both the wound core (2) and the combined current collector plate (3) are inserted into the housing through the port of the housing (1), and the port is covered and sealed by the combined cover plate (4); The positive electrode tab (231), the positive current collector piece (32) and the positive current collector post (42) are electrically connected in sequence to lead out the positive current; the negative electrode tab (221), the negative current collector piece (33) and the negative current collector post (43) are electrically connected in sequence to lead out the negative current.

2. The battery structure with the positive and negative electrodes on the same side according to claim 1, characterized in that The combined current collector plate (3) includes a disc-shaped body (31), and the body is provided with a liquid inlet hole (311) and two installation notches (312) symmetrically arranged with the axis of the wound core as the center. The positive current collector piece (32) and the negative current collector piece (33) are respectively positioned and installed in the two installation notches (312).

3. The battery structure with the positive and negative electrodes on the same side according to claim 2, wherein The positive current collector piece (32) includes a positive electrode body (321) positioned and installed in one of the installation notches (312), and a positive electrode section (322) with one end connected to the positive electrode body and the other end suspended and extending on the body (31); the negative current collector piece (33) includes a negative electrode body (331) positioned and installed in the other installation notch (312), and a negative electrode section (332) with one end connected to the negative electrode body and the other end suspended and extending on the body (31).

4. A battery structure with the positive and negative electrodes on the same side according to claim 3, characterized in that Both the positive electrode section (322) and the negative electrode section (332) are arc-shaped sections, and the positive and negative electrode sections are circularly enclosed with the axis of the wound core as the center, and the positive and negative electrode sections do not contact each other.

5. A battery structure with the positive and negative electrodes on the same side according to claim 3, characterized in that The positive electrode body (321) is provided with a positive electrode elastic piece (323) hollowed out by a cutting groove (34), and one end of the positive electrode section (322) is fixed on the positive electrode elastic piece (323) to form an elastic connection; the negative electrode body (331) is provided with a negative electrode elastic piece (333) hollowed out by a cutting groove (34), and one end of the negative electrode section (332) is fixed on the negative electrode elastic piece (333) to form an elastic connection.

6. The battery structure with the positive and negative electrodes on the same side according to claim 1, wherein The combined cover plate (4) includes a disc-shaped cover body (41), and the cover body is provided with a liquid injection hole (411), a positive current collector post (42), a negative current collector post (43) and an explosion-proof valve (45); the liquid injection hole (411) is provided with an openable and closable seal cover (44).

7. A battery structure with the positive and negative electrodes on the same side according to claim 6, characterized in that On the inner surface of the said cover body (41), there are respectively a positive connection piece (46) electrically connecting the positive current collector post (42) and a negative connection piece (47) electrically connecting the negative current collector post (43). And the combined cover plate (4) is installed on the combined current collector plate (3). The positive connection piece (46) electrically connects the positive current collector piece (32) at the same time, and the negative connection piece (47) electrically connects the negative current collector piece (33) at the same time.

8. The battery structure with the positive and negative electrodes on the same side according to claim 7, characterized in that One end of the said positive connection piece (46) is provided with a positive connection hole (461) sleeved and connected to the positive current collector post (42), and the other end of the positive connection piece (46) is provided with a positive bending section (462) in an arc shape; one end of the said negative connection piece (47) is provided with a negative connection hole (471) sleeved and connected to the negative current collector post (43), and the other end of the negative connection piece (47) is provided with a negative bending section (472) in an arc shape.

9. The battery structure with the positive and negative electrodes on the same side according to claim 8, characterized in that On the inner surface of the said cover body (41), there is an insulating ring (48) concentrically installed with the axis of the core. The positive bending section (462) and the negative bending section (472) are circularly enclosed outside the insulating ring (48), and there is no contact between the positive and negative bending sections.

10. A manufacturing method of a battery structure with the positive and negative electrodes on the same side, characterized in that The said manufacturing method includes the following steps: Step 1: Manufacture the core, the combined current collector plate and the combined cover plate Manufacture the core ① Along the length direction of the long side of the positive electrode plate (23), a plurality of positive electrode tabs (231) are sequentially cut out, and along the length direction of the long side of the negative electrode plate (22), a plurality of negative electrode tabs (221) are sequentially cut out; ② The positive electrode plate (23), the negative electrode plate (22) and the separator paper (21) are overlapped and wound into a core (2), so that the positive and negative electrode tabs are located at the same end of the core (2); ③ A plurality of positive electrode tabs (231) located at the same end of the core (2) are upset and flattened, and a plurality of negative electrode tabs (221) are also upset and flattened; Manufacture the combined current collector plate ① The positive electrode body (321) of the positive current collector piece (32) is positioned and installed in one of the installation notches (312) of the disk body (31) by a three-point positioning method, and the negative electrode body (331) of the negative current collector piece (33) is positioned and installed in the other installation notch (312) of the disk body (31) by a three-point positioning method; ② One end of the positive electrode section (322) is elastically connected to the positive electrode elastic piece (323) of the positive electrode body (321), the other end of the positive electrode section (322) is suspended and extends on the disk body (31), one end of the negative electrode section (332) is elastically connected to the negative electrode elastic piece (333) of the negative electrode body (331), the other end of the negative electrode section (332) is suspended and extends on the disk body (31), and the positive and negative electrode sections are circularly enclosed with the axis of the core as the center, and there is no contact and they are insulated from each other between the positive and negative electrode sections; Manufacture the combined cover plate ① The cover body (41) is provided with a liquid injection hole (411), a positive current collector post (42), a negative current collector post (43) and an explosion-proof valve (45); ②On the inner surface of the cover body (41), a positive electrode connecting piece (46), a negative electrode connecting piece (47), and an insulating ring (48) concentrically installed with the axis of the wound core are provided. One end of the positive electrode connecting piece (46) is sleeved and connected to the positive electrode current collector column (42) through the positive electrode connection hole (461) to form conduction. The other end of the positive electrode connecting piece (46) is provided with an arc-shaped positive electrode bending section (462). One end of the negative electrode connecting piece (47) is sleeved and connected to the negative electrode current collector column (43) through the negative electrode connection hole (471) to form conduction. The other end of the negative electrode connecting piece (47) is provided with an arc-shaped negative electrode bending section (472); ③Surround the positive electrode bending section (462) and the negative electrode bending section (472) in a circular shape outside the insulating ring (48), and the positive and negative electrode bending sections are insulated from each other without contact; Step 2: Installation between the combined current collector plate and the wound core Install the combined current collector plate (3) at one end of the wound core (2) with the positive and negative electrode tabs on the same side, and weld and fix the positive electrode tab (231) at one end of the wound core to the positive electrode current collector piece (32) of the combined current collector plate (3) to form conduction, and weld and fix the negative electrode tab (221) to the negative electrode current collector piece (33) of the combined current collector plate (3) to form conduction; Step 3: Installation between the combined cover plate and the combined current collector plate ①Install the combined cover plate (4) on the combined current collector plate (3). Through the unique design that both the positive electrode section (322) and the negative electrode section (332) are arc-shaped sections, the circle formed by enclosing the positive electrode section (322) and the negative electrode section (332) is exactly sleeved outside the circle formed by enclosing the positive and negative electrode bending sections, and the positive electrode section (322) exactly contacts the positive electrode bending section (462), and the negative electrode section (332) exactly contacts the negative electrode bending section (472). The positive electrode section (322), the positive electrode bending section (462), the negative electrode section (332), and the negative electrode bending section (472) are insulated from each other without contact; ②Weld and fix the mutually contacting positive electrode section (322) and the positive electrode bending section (462) to form conduction, and weld and fix the mutually contacting negative electrode section (332) and the negative electrode bending section (472) to form conduction; Step 4: Assembly of the wound core, combined current collector plate, combined cover plate, and outer shell Sequentially insert the welded and assembled wound core (2), combined current collector plate (3), and combined cover plate (4) into the outer shell from the port of the outer shell (1), and the combined cover plate (4) is circumferentially welded to seal the port; Step 5: Liquid injection and hole sealing After sequentially injecting electrolyte into the wound core (2) through the liquid injection hole (411) and the liquid inlet hole (311), seal the liquid injection hole (411) with the sealing cover (44) to complete the battery manufacturing.

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