Dual-lead terminal energy sheet and energy sheet module

Abstract

The present invention discloses a dual-lead terminal energy sheet and an energy sheet module. A plurality of positive plates and negative plates are staggeredly stacked inside the energy sheet bottom shell. The positive plates and negative plates are offset outwardly towards opposite sides. The offset part of the positive plate constitutes a positive connection part, and the offset part of the negative plate constitutes a negative connection part. Connection pieces are respectively arranged on the bottom shell and the cover plate, and the connection pieces are connected to the positive connection part and the negative connection part. In the present invention, the positive plates and negative plates are offset outwardly towards opposite sides, and the offset parts directly constitute connection parts, which are electrically connected to the connection pieces, having a wider current flow area, better power transmission performance, reducing the requirements for the processing molds of the electrode plates, and reducing the processing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of energy batteries, and in particular to a double-lead-out terminal energy sheet and an energy sheet module. Background Art

[0002] With the development of new energy technologies, power batteries have become increasingly important in people's daily lives. As a type of power battery, the flat energy sheet is widely used in various industries such as vehicles, electronic products, energy storage systems, transportation, smart grids, and industrial energy conservation and consumption reduction due to its advantages of small volume, high energy density, long service life, and environmental friendliness.

[0003] As Figure 1 shown in the figure is the structure of a conventional energy sheet. In its outer shell 1, a number of positive electrode sheets 2 and negative electrode sheets 3 are alternately stacked. A separator is provided between adjacent positive electrode sheets 2 and negative electrode sheets 3 for electrical isolation. A part of one side edge of the positive electrode sheet 2 extends outward to form a positive electrode tab 21, and a part of the same side edge of the negative electrode sheet 3 extends outward to form a negative electrode tab 31. The positive electrode tab 21 and the negative electrode tab 31 are located at different positions on the same side. At the end of the outer shell 1 on the same side as the electrode tabs, an end cap 4 is provided, and a positive electrode terminal 41 and a negative electrode terminal 42 are correspondingly provided on the end cap 4. The positive electrode tab 21 of the positive electrode sheet 2 is connected to the positive electrode terminal 41, and the negative electrode tab 31 of the negative electrode sheet 3 is connected to the negative electrode terminal 42. This energy sheet structure has the following problems: (1) The positive electrode sheet 2 and the negative electrode sheet 3 are connected to the corresponding electrode terminals through electrode tabs for power transmission. The current-carrying area of the electrode tabs and the electrode terminals is relatively small, and the power transmission performance is relatively poor. Moreover, when processing the positive electrode sheet 2 and the negative electrode sheet 3, the electrode tabs need to be processed simultaneously, which requires a higher processing mold for the electrode sheets and results in a higher processing cost; (2) The positive electrode terminal 41 and the negative electrode terminal 42 of the energy sheet are led out from the same end of the outer shell 1. The energy sheets can only be stacked to form an energy sheet module. The energy sheet module only effectively utilizes the space in its stacking direction, while the space utilization rate in its laying direction is not high, and the overall space utilization rate is relatively low. The energy density obtained in a limited space is relatively low; (3) After the energy sheets are stacked, the energy sheets are usually connected by leads. The arrangement of the lead wire harnesses is numerous and messy, and a space for accommodating the wire harnesses needs to be reserved, resulting in a relatively large space volume for the entire module, a relatively large requirement for the installation space of the module, and poor reliability. Summary of the Invention

[0004] The applicant of the present invention aims at the above-mentioned disadvantages of the existing energy sheets, and provides a double-lead-out terminal energy sheet and an energy sheet module with a reasonable structure, better power transmission performance, reduced processing requirements, saved processing costs, improved space utilization rate, higher energy density obtained in a limited space, simplified structure, and saved space.

[0005] The technical solutions adopted by the present invention are as follows:

[0006] A double-lead terminal energy sheet, in which a plurality of positive plates and negative plates are stacked in a staggered manner inside the bottom case, and a separator is provided between adjacent positive plates and negative plates for electrical isolation, and a cover plate is provided on the top surface of the bottom case; the positive plates and negative plates are offset outward to opposite sides, and the offset parts of the positive plates form positive connection parts, and the offset parts of the negative plates form negative connection parts; connection pieces are respectively provided on the bottom case and the cover plate, the connection piece of the bottom case and the connection piece of the cover plate are located on opposite sides, the connection piece of the bottom case is connected to one of the positive connection part and the negative connection part, and the connection piece of the cover plate is connected to the other one of the two.

[0007] As a further improvement of the above technical solution:

[0008] The connection pieces on both sides form a stacked docking part on the outer side surface of the bottom plate of the bottom case or the outer side surface of the cover plate, and a flat docking part is formed on the outer side surfaces of the opposite side plates of the bottom case.

[0009] The connection piece includes a connection bottom piece and a plurality of bent pieces. The connection bottom piece includes a plurality of alternately arranged concave parts and convex parts. One side edge of each concave part is bent to form a bent piece; the concave part protrudes on the outer side surface of the bottom plate of the bottom case or the outer side surface of the cover plate to form a stacked docking part, and the bent piece protrudes on the outer side surface of the side plate of the bottom case to form a flat docking part.

[0010] A first through hole is provided between the connecting parts of the concave part and the convex part, a second through hole is provided on the convex part, and a third through hole is provided on the bent piece; the connection piece is integrally formed by encapsulating glue on the bottom case or the cover plate. After forming, a first positioning post and a second positioning post are respectively formed on the bottom case or the cover plate corresponding to the first through hole and the second through hole, and a third positioning post is formed on the part of the bottom case corresponding to the third through hole.

[0011] The distance between the bottom surface of the concave part and the top surface of the convex part is greater than the plate thickness of the bottom plate of the bottom case or the cover plate, and the convex part protrudes on the inner side surface of the bottom plate of the bottom case or the inner side surface of the cover plate.

[0012] A plurality of installation positions are provided on the connection piece, and a plurality of positive plates or negative plates are respectively fixedly connected to the installation positions through connection rivets or hollow rivets.

[0013] On the outer side surface of the bottom plate of the bottom case, on the other side part opposite to the connection piece thereon, there is a lower protrusion; on the outer side surface of the cover plate, on the other side part opposite to the connection piece thereon, there is an upper protrusion; the protrusion heights of the lower protrusion and the upper protrusion are equivalent to the protrusion height of the connection piece on the bottom plate of the bottom case or the cover plate.

[0014] The lower protrusion and the upper protrusion are surface protrusions, or a plurality of convex points, or protruding characters or letters.

[0015] On the side plate corresponding to the connecting piece between the bottom case and the cover plate, a plurality of lower slots are provided, and the bent piece of the connecting piece of the cover plate is inserted into the lower slots.

[0016] An energy sheet module includes a plurality of double-lead terminal energy sheets, and the energy sheet monomers are formed in series or in parallel by means of stacking, or laying flat, or a combination of stacking and laying flat.

[0017] The beneficial effects of the present invention are as follows:

[0018] (1) The positive electrode sheet and the negative electrode sheet of the present invention are arranged to be offset outwardly towards opposite sides, and the offset parts of each replace the ear tabs in the prior art and directly form the connection parts, which are electrically connected to the connecting piece. The offset part is a part of the electrode sheet and its width is equivalent to the width of the electrode sheet. Compared with the ear tabs in the prior art, it has a wider current-carrying area and better power transmission performance; moreover, the electrode sheet directly forms the connection part through offset, eliminating the design and processing of additional ear tabs, reducing the requirements for the processing die of the electrode sheet, and reducing the processing cost;

[0019] (2) The positive terminal and the negative terminal of the present invention are led out from opposite ends of the energy sheet monomer through the connecting piece, and can be docked by using stacking to the docking part or laying flat to the docking part at the same time. The energy sheet module can be formed by means of stacking, or laying flat, or a combination of stacking and laying flat. The arrangement method is more flexible, and the space in the stacking direction and the space in the laying flat direction can be effectively utilized at the same time, greatly improving the space utilization rate. In the effective space, more energy sheet monomers can be arranged to obtain a higher energy density;

[0020] (3) The energy sheet monomers of the present invention are arranged in a stacked or laid-flat manner, and the electrical connection can be directly achieved by fitting the stacked docking part or the laid-flat docking part of the connecting piece, reducing the connecting leads in the module, and even directly realizing the wire-free of the module, simplifying the internal structure of the module, making the whole module more concise and beautiful. When designing, the reserved amount of the accommodation space for the wire harness can be reduced, or even the space for accommodating the wire harness can be directly not reserved, which is more conducive to the integrated design of the module, reducing the space volume of the module, reducing the requirements for the installation space of the module, reducing the cost and improving the reliability. Description of the Drawings

[0021] Figure 1 It is an exploded view of an energy sheet with an existing structure.

[0022] Figure 2 It is an exploded view of the present invention.

[0023] Figure 3 It is a three-dimensional sectional view of the present invention.

[0024] Figure 4 It is Figure 3 The enlarged view of part A in

[0025] Figure 5 is Figure 3 an enlarged view of part B in

[0026] Figure 6 is a perspective view of the connecting piece.

[0027] Figure 7 is the front view of the present invention.

[0028] Figure 8 is Figure 7 a cross-sectional view of the C-C section in

[0029] Figure 9 is Figure 8 an enlarged view of part D in

[0030] Figure 10 is Figure 8 an enlarged view of part E in

[0031] Figure 11 is a schematic structural diagram of another embodiment of the pole piece riveting and liquid injection structure.

[0032] Figure 12 is a schematic structural diagram of the energy sheet module arranged in a stacked manner of the present invention.

[0033] Figure 13 is a schematic structural diagram of the energy sheet module arranged in a tiled manner of the present invention.

[0034] In the figure: 1. Outer shell; 2. Positive electrode sheet; 21. Positive electrode tab; 3. Negative electrode sheet; 31. Negative electrode tab; 4. End cover; 41. Positive terminal; 42. Negative terminal;

[0035] 5. Bottom shell; 51. Guide platform; 52. Lower guide hole; 53. Lower slot; 54. Lower protrusion; 55. First positioning post; 56. Second positioning post; 57. Third positioning post; 6. Cover plate; 61. Upper guide hole; 62. Upper protrusion; 7. Connecting piece; 71. Connecting bottom piece; 711. Concave part; 712. High convex part; 713. Installation position; 714. First through hole; 715. Second through hole; 72. Bent piece; 721. Third through hole; 8. Connecting rivet; 9. Hollow rivet; 91. Liquid injection hole; 10. Sealing hole rivet;

[0036] 100. Energy sheet monomer. Specific embodiments

[0037] The following will describe the specific embodiments of the present invention with reference to the accompanying drawings.

[0038] First embodiment of the energy sheet:

[0039] As Figures 2 to 5As shown in the figure, a plurality of positive electrode plates 2 and negative electrode plates 3 are stacked in a staggered manner in the bottom case 5 of the energy sheet monomer 100 of the present invention. A separator is provided between adjacent positive electrode plates 2 and negative electrode plates 3 for electrical isolation, and a cover plate 6 is provided on the top surface of the bottom case 5 for capping. The connection parts of the positive electrode plates 2 and the negative electrode plates 3 are located on opposite side parts, that is: one side edge of all the positive electrode plates 2 is offset outward by a certain distance relative to the negative electrode plates 3 to form a positive electrode connection part, and the other side edge of all the negative electrode plates 3 is offset outward by a certain distance relative to the positive electrode plates 2 to form a negative electrode connection part. A connection piece 7 is provided on one side part of the bottom case 5 relative to the negative electrode connection part of the negative electrode plate 3, and a connection piece 7 is provided on the other side part of the cover plate 6 relative to the positive electrode connection part of the positive electrode plate 2; the positive electrode connection parts of all the positive electrode plates 2 are connected and fixed to the connection piece 7 on the corresponding side through a plurality of connection rivets 8, and the negative electrode connection parts of all the negative electrode plates 3 are also connected and fixed to the connection piece 7 on the corresponding side through a plurality of connection rivets 8, and the positive electrode plates 2 and the negative electrode plates 3 are electrically connected to the connection piece 7 on the corresponding side part respectively. Of course, in other embodiments, the connection piece 7 of the bottom case 5 is connected to the positive electrode plate 2, and the connection piece 7 of the cover plate 6 is connected to the negative electrode plate 3. The positive electrode plate 2 and the negative electrode plate 3 are arranged with an offset relative to each other, and the offset parts replace the pole ears in the prior art and directly form the connection parts, which are electrically connected to the connection piece 7. The offset parts are part of the pole plate, and their width is equivalent to the width of the pole plate. Compared with the pole ears in the prior art, they have a wider current flow area and better power transmission performance; moreover, the pole plates directly form the connection parts through offset, eliminating the design and processing of additional pole ears, reducing the requirements for the pole plate processing die, and reducing the processing cost.

[0040] As Figure 6 shown, the connection piece 7 includes a connection bottom piece 71 and a plurality of bent pieces 72 formed by bending 90° from one side edge of the connection bottom piece 71. The connection bottom piece 71 includes a plurality of concave parts 711 and convex parts 712 arranged alternately along its length direction. The downward concave direction of the concave part 711 is opposite to the bending direction of the bent piece 72, and the upward convex direction of the convex part 712 is the same as the bending direction of the bent piece 72. The distance between the bottom surface of the concave part 711 and the top surface of the convex part 712 is greater than the plate thickness of the bottom plate of the bottom case 5 or the cover plate 6; an installation position 713 is convex upward on each concave part 711 in the same direction as the bent piece 72, and the installation position 713 is used for connecting and installing the connection rivet 8; a first through hole 714 is provided between the connected parts of the concave part 711 and the convex part 712, and a second through hole 715 is provided on the convex part 712. A bent piece 72 is formed by bending one side edge of each concave part 711 respectively, and a third through hole 721 is provided on the bent piece 72.

[0041] As Figures 7 to 10As shown, the connecting piece 7 is integrally formed with rubber coating on the bottom case 5 or the cover plate 6. After integral molding, the concave part 711 of the connecting piece 7 protrudes from the outer side surface of the bottom plate of the bottom case 5 or the outer side surface of the cover plate 6 to form a stacked docking part, and the high convex part 712 protrudes from the inner side surface of the bottom plate of the bottom case 5 or the inner side surface of the cover plate 6; the bent piece 72 on the connecting piece 7 of the bottom case 5 protrudes from the outer side surface of the corresponding side plate of the bottom case 5, and the bent piece 72 on the connecting piece 7 of the cover plate 6 is buckled on the outer side surface of the other side plate of the bottom case 5, and the bent piece 72 forms a flat docking part. During the process of integrally molding the connecting piece 7 with the bottom case 5 or the cover plate 6 by injecting glue, when injecting glue, the glue will enter the first through hole 714, the second through hole 715 and / or the third through hole 721 of the connecting piece 7. After the glue solidifies and forms, the parts on the bottom case 5 or the cover plate 6 corresponding to the first through hole 714, the second through hole 715 and / or the third through hole 721 respectively form the first positioning post 55, the second positioning post 56 and / or the third positioning post 57. Each positioning post positions the connecting piece 7 to ensure the position accuracy of the connecting piece 7 and improve the reliability of the connecting piece 7.

[0042] As Figure 2 , Figure 4 shown Figure 9 As shown, guiding platforms 51 are respectively arranged at the four corner parts of the bottom case 5, and through lower guiding holes 52 are opened on the guiding platforms 51; corresponding through upper guiding holes 61 are opened on the cover plate 6; when assembling into an energy piece module, the guiding rod can directly pass through the lower guiding holes 52 of the bottom case 5 and the upper guiding holes 61 of the cover plate 6 to connect the energy piece monomers 100 together, which is convenient for the assembly of the energy module.

[0043] As Figure 2 , Figure 4 shown

[0044] As Figures 2 to 4As shown in the figure, on the outer side of the bottom plate of the bottom case 5, on the other side opposite to the connecting piece 7 thereon, there is a lower protrusion 54, and the protrusion height of the lower protrusion 54 is equivalent to the protruding height of the connecting piece 7 on the bottom plate of the bottom case 5. On the outer side of the cover plate 6, on the other side opposite to the connecting piece 7 thereon, there is an upper protrusion 62, and the protrusion height of the upper protrusion 62 is equivalent to the protruding height of the connecting piece 7 on the surface of the cover plate 6. The protrusion heights of the lower protrusion 54, the upper protrusion 62 and the connecting piece 7 are equivalent. When the energy sheet monomers 100 are stacked, the lower protrusion 54 / upper protrusion 62 and the connecting piece 7 can respectively support both ends of the energy sheet monomer 100, ensuring that the energy sheet monomer 100 remains horizontal and does not tilt, and ensuring the electrical performance of the energy sheet monomer 100. The lower protrusion 54 and the upper protrusion 62 can be surface protrusions, or can be composed of several convex points, or can also be set as raised characters or letters according to needs, as long as they can support the adjacent energy sheet monomers 100.

[0045] In this embodiment, a liquid injection port (not shown in the figure) can be opened on the cover plate 6. During use, after injecting electrolyte into the bottom case 5 through the liquid injection port, the liquid injection port is then sealed with a sealing member.

[0046] Second embodiment of the energy sheet:

[0047] As Figure 11 shown, the difference between this embodiment and the first embodiment is that the mounting position 713 on the connecting piece 7 of the cover plate 6 connects and fixes the positive electrode sheet 2 or the negative electrode sheet 3 through a hollow rivet 9, and the central through hole of the hollow rivet 9 forms a liquid injection hole 91. After the liquid injection is completed, the liquid injection hole 91 is sealed with a sealing rivet 10; in this way, the processing of the liquid injection port on the cover plate 6 is saved, the processing difficulty of the cover plate 6 is reduced, and the processing cost is saved.

[0048] Embodiment of the energy sheet module:

[0049] As Figure 12 、 Figure 13 shown, since the connecting piece 7 is respectively formed with docking parts in the stacking direction and the laying direction of the energy sheet monomers 100, several energy sheet monomers 100 can be docked, connected in series or in parallel by using the docking parts in the stacking direction to form an energy sheet module ( Figure 12 ), or can be docked, connected in series or in parallel by using the docking parts in the laying direction to form an energy sheet module ( Figure 13 ).

[0050] The above description is an explanation of the present invention, not a limitation of the present invention. Without departing from the spirit of the present invention, the present invention can be modified in any form.

Claims

1. A double-lead terminal energy sheet, in which a plurality of positive electrode sheets (2) and negative electrode sheets (3) are arranged in a staggered and laminated manner inside a bottom case (5), and a separator is provided between adjacent positive electrode sheets (2) and negative electrode sheets (3) for electrical isolation, characterized in that: A cover plate (6) is provided on the top surface of the bottom case (5); the positive electrode plate (2) and the negative electrode plate (3) are offset outwardly to opposite sides, and the offset part of the positive electrode plate (2) forms a positive connection part, and the offset part of the negative electrode plate (3) forms a negative connection part; connection pieces (7) are respectively provided on the bottom case (5) and the cover plate (6), the connection pieces (7) of the bottom case (5) and the connection pieces (7) of the cover plate (6) are located on opposite sides, and the connection piece (7) of the bottom case (5) is connected to one of the positive connection part and the negative connection part, and the connection piece (7) of the cover plate (6) is connected to the other; the connection piece (7) includes a connection bottom piece (71) and several bent pieces (72), the connection bottom piece (71) includes several alternately arranged concave parts (711) and convex parts (712), and one side of each concave part (711) is bent to form a bent piece (72); the concave part (711) protrudes on the outer side surface of the bottom plate of the bottom case (5) or the outer side surface of the cover plate (6) to form a stacked docking part, and the bent piece (72) protrudes on the outer side surface of the side plate of the bottom case (5) to form a flat docking part; a first through hole (714) is provided between the connection part of the concave part (711) and the convex part (712), a second through hole (715) is provided on the convex part (712), and a third through hole (721) is provided on the bent piece (72); the connection piece (7) is integrally formed by encapsulating glue on the bottom case (5) or the cover plate (6). After forming, first positioning posts (55) and second positioning posts (56) are respectively formed on the bottom case (5) or the cover plate (6) corresponding to the first through hole (714) and the second through hole (715), and a third positioning post (57) is formed on the bottom case (5) corresponding to the third through hole (721).

2. The double-lead terminal energy sheet according to claim 1, wherein: The distance between the bottom surface of the concave part (711) and the top surface of the convex part (712) is greater than the plate thickness of the bottom plate of the bottom case (5) or the cover plate (6), and the convex part (712) protrudes on the inner side surface of the bottom plate of the bottom case (5) or the inner side surface of the cover plate (6).

3. The double-lead terminal energy sheet according to claim 1, wherein: Several mounting positions (713) are provided on the connection piece (7), and several positive electrode plates (2) or negative electrode plates (3) are respectively fixedly connected to the mounting positions (713) through connection rivets (8) or hollow rivets (9).

4. The double-lead-out terminal energy sheet according to claim 1, characterized in that: On the outer side surface of the bottom plate of the bottom case (5), on the other side opposite to the connection piece (7) thereon, there is a lower protrusion (54); on the outer side surface of the cover plate (6), on the other side opposite to the connection piece (7) thereon, there is an upper protrusion (62); the protrusion heights of the lower protrusion (54) and the upper protrusion (62) are equivalent to the protrusion height of the connection piece (7) on the bottom plate of the bottom case (5) or the cover plate (6).

5. The double-lead terminal energy sheet according to claim 4, characterized in that: The lower protrusion (54) and the upper protrusion (62) are surface protrusions, or several convex points, or protruding characters or letters.

6. The double-lead terminal energy sheet according to claim 1, wherein: Several lower slots (53) are provided on the side plates of the bottom case (5) and the cover plate (6) corresponding to the connection piece (7), and the bent pieces (72) of the connection piece (7) of the cover plate (6) are inserted into the lower slots (53).

7. An energy tablet module, characterized in that: Comprising a double-lead terminal energy sheet according to any one of claims 1-6, the energy sheet monomers (100) are formed in series or in parallel by means of stacking, or laying flat, or a combination of stacking and laying flat.

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