Electrochemical Energy Storage Device

Abstract

An electrochemical energy storage device comprises: a cover plate (4), comprising a lead-out bar (41) and a fixing plate (42), wherein the lead-out bar (41) is a conductor, the fixing plate (42) is an insulator, and the lead-out bar (41) vertically passes through the fixing plate (42) and is fixed thereon; a housing (9), which is cylindrical and is provided with an opening at at least one end thereof, wherein the insulating fixing plate (42) and the opening of the housing (9) are connected in a sealed manner by means of a sealing ring (2); and a rolled core (7), provided in an inner cavity of the housing (9), wherein the rolled core (7) is conductively connected to the lead-out bar (41) by means of an upper connecting piece (6), and is conductively connected to another lead-out end of the housing (9) by means of a lower connecting piece (8); and the device further comprises: a welding ring (1), conductively connected to the housing (9) by means of welding, and a welding bar (3), conductively connected to the lead-out bar (41) of the cover plate (4) by means of welding, wherein the welding ring (1) and the welding bar (3) are provided on the same side of the housing (9). The upper connecting piece (6) and the lower connecting piece (8) respectively lead out the positive electrode and the negative electrode of the electrochemical energy storage device, and lead the positive electrode and the negative electrode to the outside. The device is led out at two ends, has a low internal resistance, and can be tin-soldered, thereby facilitating the assembly of modules.

Claims

1-10. (canceled)

11. An electrochemical energy storage device, comprising: a cover plate (4), comprising a lead-out bar (41) and a fixing plate (42), wherein the lead-out bar (41) is a conductor, the fixing plate (42) is an insulator, and the lead-out bar (41) vertically passes through the fixing plate (42) and is fixed thereon; a housing (9), which is cylindrical and is provided with an opening at at least one end, wherein the insulating fixing plate (42) and the opening of the housing (9) are connected in a sealed manner by means of a sealing ring (2); and a rolled core (7), provided in an inner cavity of the housing (9), wherein the rolled core (7) is conductively connected to the lead-out bar (41) by means of an upper connecting piece (6), and is conductively connected to another lead-out end of the housing (9) by means of a lower connecting piece (8); and characterized in that it further comprises: a welding ring (1), conductively connected to the housing (9) by welding; and a welding bar (3), conductively connected to the lead-out bar (41) of the cover plate (4) by welding, wherein the welding ring (1) and the welding bar (3) are provided on the same side of the housing (9).

12. The electrochemical energy storage device according to claim 11, characterized in that the welding ring (1) is tin-plated, a first curled edge (11) for welding with the housing (9) is provided at the circumference of the welding ring (1), and at least one welding terminal (12) with a hole is provided at its center for conduction and fixing the welding ring (1) when welded to a circuit board.

13. The electrochemical energy storage device according to claim 12, characterized in that at least one projection (13) is provided on the first curled edge (11), and the projection (13) corresponds to the welding terminal (12).

14. The electrochemical energy storage device according to claim 11, characterized in that the upper connecting piece (6) is made of aluminum, and is fixed to the lead-out bar (41) by laser welding; an upper hole (62) for electrolyte permeation is provided on the circumference of the upper connecting piece (6).

15. The electrochemical energy storage device according to claim 14, characterized in that an upper hollow cylinder (61) is provided at the center of the upper connecting piece (6), which is used to be placed in the pinhole (71) at the center of the rolled core (7); an upper curled edge (63) is provided on part of the circumference of the upper connecting piece (6), which is used for fixing the outer layer of the rolled core (7); an aluminum strip is connected to the upper connecting piece (6), which is used for welding with the lead-out bar (41) of the cover plate (4).

16. The electrochemical energy storage device according to claim 15, characterized in that an insulation tube (5) is sleeved on the upper curled edge (63) on part of the circumference of the upper connecting piece (6).

17. The electrochemical energy storage device according to claim 11, characterized in that the lead-out bar (41) is an aluminum bar, and the fixing plate (42) is a resin plate; the cover plate (4) is in a stepped ring shape, the lead-out bar (41) is provided at the center of the fixing plate (42), and a fixing hole (411) for fixing the welding bar (3) is provided at the center of the end of the lead-out bar (41) farther away from the housing (9).

18. The electrochemical energy storage device according to claim 17, characterized in that the welding bar (3) comprises a first bar (31) and a second bar (32) provided at the bottom of the first bar (31), wherein the first bar (31) is tin-plated, the diameter of the first bar (31) is smaller than that of the second bar (32), and the second bar (32) is mounted in the fixing hole (411).

19. The electrochemical energy storage device according to claim 11, characterized in that the lower connecting piece (8) is made of aluminum, and is fixed to the housing (9) by laser welding; a lower hole (82) for electrolyte permeation is provided on the circumference of the lower connecting piece (8).

20. The electrochemical energy storage device according to claim 19, characterized in that a lower hollow cylinder (81) is provided at the center of the lower connecting piece (8), which is used for fitting with the positioning bar (91) at the bottom of the housing (9) and the central pinhole (71) of the rolled core (7); a lower curled edge (83) for fixing the rolled core (7) is provided on the circumference of the lower connecting piece (8).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is an exploded structural diagram of an electrochemical energy storage device of the present invention;

[0029] FIG. 2 is a schematic structural diagram of an electrochemical energy storage device of the present invention after assembling;

[0030] FIG. 3 is an A-A section view of FIG. 2;

[0031] FIG. 4 is a detailed schematic diagram of A in FIG. 3;

[0032] FIG. 5 is a detailed schematic diagram of B in FIG. 3;

[0033] FIG. 6 is a schematic structural diagram of the cover plate of an electrochemical energy storage device of the present invention;

[0034] FIG. 7 is a top view of the upper connecting piece of an electrochemical energy storage device of the present invention;

[0035] FIG. 8 is a side view of the upper connecting piece of an electrochemical energy storage device of the present invention;

[0036] FIG. 9 is a top view of the lower connecting piece of an electrochemical energy storage device of the present invention;

[0037] FIG. 10 is a front view of the lower connecting piece of an electrochemical energy storage device of the present invention;

[0038] FIG. 11 is a schematic structural diagram of the housing of an electrochemical energy storage device of the present invention;

[0039] FIG. 12 is a schematic structural diagram of the welding ring without a curled edge in embodiment 1;

[0040] FIG. 13 is a schematic structural diagram of the welding ring with a curled edge in embodiment 1;

[0041] FIG. 14 is a schematic structural diagram of the welding bar of an electrochemical energy storage device of the present invention;

[0042] FIG. 15 is a schematic structural diagram of the rolled core of an electrochemical energy storage device of the present invention.

[0043] Reference numerals in the drawings: 1—welding ring, 2—sealing ring, 3—welding bar, 4—cover plate, 5—insulation tube, 6—upper connecting piece, 7—rolled core, 8—lower connecting piece, 9—housing, 11—first curled edge, 12—welding terminal, 13—projection, 31—first bar, 32—second bar, 41—lead-out bar, 41—upper positioning hole, 42—fixing plate, 61—upper hollow cylinder, 62—upper hole, 63—upper curled edge, 64—aluminum strip, 71—pinhole of the rolled core, 81—lower hollow cylinder, 82—lower hole, 83—lower curled edge, 91—positioning bar, 411—fixing hole.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The present invention will be further described below in conjunction with the embodiments. The described embodiments are only some of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those ordinarily skilled in the art without inventive work shall fall within the scope of the present invention.

Embodiment 1

[0045] As shown in FIGS. 1 to 3, an electrochemical energy storage device comprises: a cover plate 4, comprising a lead-out bar 41 and a fixing plate 42, wherein the lead-out bar 41 is a conductor, the fixing plate 42 is an insulator, and the lead-out bar 41 vertically passes through the fixing plate 42 and is fixed thereon; a housing 9, which is cylindrical and is provided with an opening at at least one end, wherein the fixing plate 42 and the opening of the housing 9 are connected in a sealed manner by means of a sealing ring 2; and a rolled core 7, provided in an inner cavity of the housing 9, wherein the rolled core 7 is conductively connected to the lead-out bar 41 by means of an upper connecting piece 6, and is conductively connected to another lead-out end of the housing 9 by means of a lower connecting piece 8; and the device further comprises: a welding ring 1, conductively connected to the lead-out bar 41 of the cover plate 4 by welding, wherein the welding ring 1 and the welding bar 3 are provided on the same side of the housing 9.

[0046] As shown in FIG. 13, the welding ring 1 is tin-plated, thereby facilitating welding to a circuit board; a first curled edge 11 used for welding with the housing 9 is provided on the circumference of the welding ring 1, to enhance the strength of the welding ring 1 and to facilitate welding with a curled edge of the housing 9; this structure is used when the plate used for the welding ring is thin. As shown in FIG. 12, when the welding ring is thick, there is no need of a curled edge on the circumference of the welding ring to ensure the strength of the welding ring and to ensure welding with a curled edge of the housing. At least one welding terminal 12 with a hole is provided at its center for conduction and fixing the welding ring 1 when welded to a circuit board. In this embodiment, three welding terminals 12 are provided at an equal spacing at the center of the welding ring 1, which are used for conduction and fixing the welding ring 1 to a circuit board; the three welding terminals 12 can define the plane of the circuit board, thereby facilitating positioning.

[0047] As shown in FIG. 6, in this embodiment, the lead-out bar 41 is an aluminum bar, and the fixing plate 42 is a resin plate; the cover plate 4 is in a stepped ring shape, the lead-out bar 41 is provided at the center of the fixing plate 42, and a fixing hole 411 for fixing the welding bar 3 is provided at the center of the end of the lead-out bar 41 farther away from the housing 9.

[0048] To further optimize the above technical solution, at least one projection 13 is provided on the first curled edge 11, and the projection 13 corresponds to the welding terminal 12. In this embodiment, three projections 13 are provided, and the projections 13 are intended to position the welding ring 1 on a circuit board and to maintain point contacts between the welding ring 1 and the circuit board while providing gaps for wires, thereby ensuring insulation and facilitating air flow and heat dissipation.

[0049] Preferably, the upper connecting piece 6 is made of aluminum, and is fixed to the lead-out bar 41 by laser welding; an upper hole 62 for electrolyte permeation is provided on the circumference of the upper connecting piece 6. This makes it easy for the electrolyte to permeate.

[0050] As shown in FIGS. 4 and 5, the present invention discloses an electrochemical energy storage device, comprising structures such as a cover plate 4, a housing 9, a rolled core 7, an upper connecting piece 6, a lower connecting piece 8, a welding bar 3, a welding ring 1, etc., wherein the cover plate 4 comprises a lead-out bar 41 and a fixing plate 42, the lead-out bar 41 is a conductor, the fixing plate 42 is an insulator, the lead-out bar 41 vertically passes through the fixing plate 42 and is fixed thereon, and a welding bar 3 is welded to the end of the lead-out bar 41 as one electrode of the device, thereby facilitating welding to a circuit board. The housing 9 is cylindrical and is provided with an opening at at least one end; the insulating fixing plate 42 and the opening of the housing 9 are connected in a sealed manner by means of a sealing ring 2; the rolled core 7 is provided in an inner cavity of the housing 9; the rolled core 7 is conductively connected to the lead-out bar 41 by means of the upper connecting piece 6, and is conductively connected to another lead-out end of the housing 9 by means of the lower connecting piece 8; the welding ring 1 is welded to the housing 9 and acts as another electrode of the device; the upper connecting piece 6 and the lower connecting piece 8 respectively lead out the positive electrode and the negative electrode of the electrochemical energy storage device, and lead the positive and the negative electrodes to the outside; the device is led out on two ends, has a low internal resistance, and can be tin-soldered, thereby facilitating the assembly of modules.

Embodiment 2

[0051] As shown in FIGS. 7 and 8, this embodiment is a further optimization based on embodiment 1. The improvements compared with embodiment 1 will be the focus of the description for this embodiment, and similarities will not be repeated. In this embodiment, an upper hollow cylinder 61 is provided at the center of the upper connecting piece 6, which is used to be placed in the pinhole 71 at the center of the rolled core 7, as shown in FIG. 15; an upper curled edge 63 is provided on part of the circumference of the upper connecting piece 6, which is used for fixing the outer layer of the rolled core 7 to improve shock resistance; an aluminum strip is connected to the upper connecting piece 6, which is used for welding with the lead-out bar 41 of the cover plate 4. For assembling, after fixing by welding, the upper connecting piece 6 is bent.

Embodiment 3

[0052] This embodiment is a further optimization based on embodiment 2. The improvements of this embodiment compared with embodiment 2 will be the focus of the description, and similarities will not be repeated. In this embodiment, an insulation tube 5 is sleeved on the upper curled edge 63 on part of the circumference of the upper connecting piece 6. The insulation tube 5 is inserted into the upper curled edge 63 on part of the circumference of the upper connecting piece 6, the upper curled edge 63 is sleeved on part of the outer layer of the rolled core 7, the rolled core 7 is then placed in the housing 9, and the insulation tube 5 acts for insulation and fixing between the rolled core 7 and the housing 9.

Embodiment 4

[0053] As shown in FIG. 14, this embodiment is a further optimization based on embodiment 3. The improvements compared with embodiment 3 will be the focus of the description for this embodiment, and similarities will not be repeated. In this embodiment, the welding bar 3 comprises a first bar 31 and a second bar 32 provided at the bottom of the first bar 31, wherein the first bar 31 is tin-plated, to facilitate welding to a circuit board; the diameter of the first bar 31 is smaller than that of the second bar 32, and the second bar 32 is mounted in the fixing hole 411, and is conductively connected to the lead-out bar 41 by welding.

Embodiment 5

[0054] As shown in FIGS. 9 and 10, this embodiment is a further optimization based on embodiment 4, the improvements compared with embodiment 4 will be the focus of description for this embodiment, and similarities will not be repeated. In this embodiment, a lower hollow cylinder 81 is provided at the center of the lower connecting piece 8, which is used to fit with the positioning bar 91 at the bottom of the housing 9 and the central pinhole 71 of the rolled core 7, as shown in FIG. 11; a lower curled edge 83 used for fixing the outer layer of the rolled core 7 is provided on the circumference of the lower connecting piece 8. The lower hollow cylinder 81 at the center of the lower connecting piece 8 can be placed in the central pinhole 71 of the rolled core 7, and the positioning bar 91 at the bottom of the housing 9 is then placed into the hollow cylinder, thereby the rolled core 7 is positioned and fixed; the lower curled edge 83 on the circumference of the lower connecting piece 8 can fix the outer layer of the rolled core 7, thereby improving shock resistance.

[0055] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement or improvement made without departing from the motivation and principle of the present invention shall be included in its scope.