CN209947672U

CN209947672U - Electrochemical energy storage device

Info

Publication number: CN209947672U
Application number: CN201920871541.XU
Authority: CN
Inventors: 陈德忠; 罗俊强; 董光勇; 向杰; 赵方辉
Original assignee: Chengdu Concave Amperex Technology Ltd
Current assignee: Anshi new energy (Chengdu) Co., Ltd
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-01-14
Anticipated expiration: 2029-06-11

Abstract

The utility model discloses an electrochemistry energy memory, include: the cover plate comprises a leading-out column and a fixing plate, the leading-out column is a conductor, the fixing plate is an insulator, and the leading-out column penetrates through and is fixed on the fixing plate up and down; the shell is cylindrical, an opening is formed in at least one end of the shell, and the insulated fixing plate is connected with the opening of the shell in a sealing mode through a sealing ring; the winding core is arranged in the inner cavity of the shell, is in conductive connection with the leading-out column through an upper connecting sheet and is in conductive connection with the other leading-out end of the shell through a lower connecting sheet; further comprising: the welding ring is in conductive connection with the shell through welding; the welding column is in conductive connection with the leading-out column of the cover plate through welding, and the welding ring and the welding column are arranged on the same side of the shell. The upper connecting sheet and the lower connecting sheet are respectively led out of the anode and the cathode of the electrochemical energy storage device, and the anode and the cathode are led to the outside; the device is led out from two ends, has low internal resistance, can be soldered and is convenient for assembling the module.

Description

Electrochemical energy storage device

Technical Field

The utility model relates to an electrochemistry energy storage device technical field, more specifically the utility model relates to an electrochemistry energy storage device.

Background

The super capacitor is also called as an electrochemical capacitor, is an electrochemical element for storing energy through a polarized electrolyte, has high power density, short charging time and long service life, and is more and more regarded as an auxiliary energy source in storage systems of electric vehicles and smart grids. The structure that the anode and the cathode of the capacitor are positioned at the same end of the shell is called an end-lead-out capacitor; the large and medium capacitor generally adopts a two-end lead-out mode, the internal resistance of the super capacitor with a two-end lead-out structure is much lower than that of a one-end lead-out structure, and larger current discharge can be realized, so that the power performance of the super capacitor is improved.

In order to realize that a product can be soldered on a circuit board, at present, capacitors are led out from two ends of the circuit board by using an aluminum shell as a conductor, one electrode is led to one end of a cover plate from the bottom end, the cover plate is usually an aluminum cover plate, and the cover plate and a shell are usually sealed by laser welding to realize the conduction of the cover plate and the shell. And the other pole, which is usually disposed at the center of the cover plate, is insulation-sealed from the cover plate by an insulating gasket. The laser sealing has a high risk of liquid leakage and a complex process.

And the insulating seal gasket between central electrode and the apron, there is the risk of weeping and short circuit, and because of sealed consideration, central electrode is general less, and electric conductivity is poor, and insulating seal gasket then is unfavorable for the heat dissipation. The central sealing gasket is made of elastic rubber, so that the central sealing gasket is easy to deform and leak liquid after being stressed; in the high-temperature baking dehydration process, the leakage risk also exists because the deformation of the sealing gasket and the aluminum is different.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electrochemistry energy storage device for solve the problem that exists among the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an electrochemical energy storage device comprising:

the cover plate comprises a leading-out column and a fixing plate, the leading-out column is a conductor, the fixing plate is an insulator, and the leading-out column penetrates through and is fixed on the fixing plate up and down;

the shell is cylindrical, an opening is formed in at least one end of the shell, and the insulated fixing plate is connected with the opening of the shell in a sealing mode through a sealing ring;

the winding core is arranged in the inner cavity of the shell, is in conductive connection with the leading-out column through an upper connecting sheet and is in conductive connection with the other leading-out end of the shell through a lower connecting sheet; further comprising:

the welding ring is in conductive connection with the shell through welding;

the welding column is in conductive connection with the leading-out column of the cover plate through welding, and the welding ring and the welding column are arranged on the same side of the shell.

Furthermore, the welding ring is tinned, first turned edges used for being welded with the shell are arranged on the periphery of the welding ring, and at least one perforated soldering lug used for welding the welding ring on the circuit board in the middle is arranged.

Furthermore, at least one protrusion is arranged on the first scroll edge, and the protrusion corresponds to the soldering lug.

Furthermore, the upper connecting sheet is an aluminum sheet and is fixed with the leading-out column through laser welding; the periphery of the upper connecting sheet is provided with upper holes for electrolyte permeation.

Furthermore, an upper hollow column is arranged in the middle of the upper connecting sheet and is used for placing a middle winding pinhole of the winding core; the periphery of the upper connecting sheet is provided with a part of upper curled edge for fixing the outer ring of the winding core; the upper connecting sheet is connected with a strip-shaped aluminum sheet for welding with the leading-out column of the cover plate.

Furthermore, the insulating tube is sleeved on the upper curled edge of the part arranged on the periphery of the upper connecting sheet.

Further, the leading-out column is an aluminum column, and the fixing plate is a resin plate; the cover plate is in the shape of a circular ring step, the leading-out column is arranged at the center of the fixing plate, and a fixing hole for fixing the welding column is formed in the center of one end, far away from the shell, of the leading-out column.

Furthermore, the welding post is composed of a first post and a second post arranged at the bottom of the first post, the first post is plated with tin, the diameter of the first post is smaller than that of the second post, and the second post is arranged in the fixing hole.

Furthermore, the lower connecting sheet is an aluminum sheet and is fixed with the shell through laser welding; and lower holes for electrolyte permeation are formed around the lower connecting sheet.

Furthermore, a lower hollow column matched with the bottom positioning column of the shell and the middle winding pin hole of the winding core is arranged in the middle of the lower connecting sheet; the periphery of the lower connecting sheet is provided with a lower curled edge for fixing the outer ring of the roll core.

Compared with the prior art, the utility model beneficial effect who has is:

1. the utility model discloses an electrochemical energy storage device, which comprises a cover plate, a shell, a winding core, an upper connecting sheet, a lower connecting sheet, a welding column, a welding ring and other structures, wherein the cover plate comprises a leading-out column and a fixed plate, the leading-out column is an electric conductor, the fixed plate is an insulator, the leading-out column is vertically penetrated and fixed on the fixed plate, and the tail end of the leading-out column is provided with the welding column which is one pole of the device; the welding on the circuit board is convenient. The shell is cylindrical and at least one end of the shell is provided with an opening; the insulating fixing plate is hermetically connected with the opening of the shell through a sealing ring; the winding core is arranged in the inner cavity of the shell; the winding core is in conductive connection with the leading-out column through an upper connecting sheet and is in conductive connection with the other leading-out end of the shell through a lower connecting sheet; the welding ring is welded on the shell to become the other pole of the device; the upper connecting sheet and the lower connecting sheet are respectively led out of the anode and the cathode of the electrochemical energy storage device, and the anode and the cathode are led to the outside; the device is led out from two ends, has low internal resistance, can be soldered and is convenient for assembling the module.

2. The utility model discloses an upper connecting piece is strengthened fixedly through hollow post, turn-up down and the cooperation of rolling up the core down through hollow post, turn-up down and the cooperation of rolling up the core through hollow post, last turn-up and lower connection piece, increases the shock resistance. The upper connecting sheet and the shell are insulated and fixed with the shell through a high-temperature-resistant insulating tube, and the lower connecting sheet is fixed with the shell through tight fit or a positioning column. Can increase the fastness of lower upper connecting piece and lower connecting piece and shell in the use, the shock resistance is good.

3. The upper connecting sheet of the utility model is distributed with upper holes, and the lower connecting sheet is distributed with lower holes, which is beneficial to the permeation of electrolyte; the welding column and the welding ring are the positive and negative poles of the device and can be welded on the circuit board.

4. The utility model discloses an apron comprises extraction post and fixed plate, and both are fixed as a whole structure, and it is insulating through the fixed plate to extract between post and the shell, need not use other insulating material, can play better insulating effect.

5. The utility model discloses an at least, be provided with an arch on the turn-up, it is preferably three, it is protruding corresponding with the soldering lug, and bellied setting is in order to be used for welding the circle location on the circuit board, and guarantees welding circle and circuit board point contact, reserves the line clearance, guarantees insulating nature, and does benefit to the circulation of air heat dissipation.

Drawings

Fig. 1 is an exploded view of an electrochemical energy storage device according to the present invention;

fig. 2 is a schematic structural diagram of an electrochemical energy storage device according to the present invention after being assembled;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is an enlarged partial schematic view of C of FIG. 3;

FIG. 5 is an enlarged partial schematic view of B in FIG. 3;

fig. 6 is a schematic structural diagram of a cover plate of an electrochemical energy storage device according to the present invention;

fig. 7 is a top view of an upper connection pad of an electrochemical energy storage device according to the present invention;

fig. 8 is a side view of an upper connection tab of an electrochemical energy storage device of the present invention;

fig. 9 is a top view of a lower connection pad of an electrochemical energy storage device according to the present invention;

fig. 10 is a front view of a lower connection pad of an electrochemical energy storage device according to the present invention;

fig. 11 is a schematic structural view of a housing of an electrochemical energy storage device according to the present invention;

FIG. 12 is a schematic view of the structure of a welding ring without a curl in example 1;

FIG. 13 is a schematic view of the structure of a welding ring having a bead in embodiment 1;

fig. 14 is a schematic structural view of a welding column of an electrochemical energy storage device according to the present invention;

fig. 15 is a schematic structural diagram of a winding core of an electrochemical energy storage device according to the present invention.

The labels in the figure are: 1-welding ring, 2-sealing ring, 3-welding column, 4-cover plate, 5-insulating tube, 6-upper connecting piece, 7-winding core, 8-lower connecting piece, 9-shell, 11-first turn-up, 12-welding piece, 13-bulge, 31-first column, 32-second column, 41-leading column, 41-upper positioning hole, 42-fixing plate, 61-upper hollow column, 62-upper hole, 63-upper turn-up, 64-strip aluminum sheet, 71-winding pin hole, 81-lower hollow column, 82-lower hole, 83-lower turn-up, 91-positioning column and 411-fixing hole.

Detailed Description

The present invention will be further described with reference to the following examples, which are only some, but not all, of the examples of the present invention. Based on the embodiments in the present invention, other embodiments used by those skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

as shown in fig. 1-3, an electrochemical energy storage device, comprising: the cover plate 4 comprises a leading-out column 41 and a fixing plate 42, wherein the leading-out column 41 is a conductor, the fixing plate 42 is an insulator, and the leading-out column 41 penetrates through and is fixed on the fixing plate 42 from top to bottom; the shell 9 is cylindrical, an opening is formed in at least one end of the shell, and the insulating fixing plate 42 is connected with the opening of the shell 9 through a sealing ring 2; the winding core 7 is arranged in the inner cavity of the shell 9, and the winding core 7 is in conductive connection with the leading-out column 41 through an upper connecting sheet 6 and is in conductive connection with the other leading-out end of the shell 9 through a lower connecting sheet 8; further comprising: the welding ring 1 is in conductive connection with the shell 9 through welding; the welding column 3 is connected with the leading-out column 41 of the cover plate 4 in an electric conduction mode through welding, and the welding ring 1 and the welding column 3 are arranged on the same side of the shell 9.

As shown in fig. 13, the solder ring 1 is plated with tin, which is beneficial for being soldered on a circuit board; the first turned edge 11 for welding with the shell 9 is arranged on the periphery of the welding ring 1, so that the strength of the welding ring 1 is enhanced, and the turned edge welding with the shell 9 is facilitated; the structure is adopted when the plate thickness of the welding ring is thinner. As shown in fig. 12, when the thickness of the welding ring is thick, the strength of the welding ring and the welding with the flange of the housing can be ensured without the need of the flange around the plate of the welding ring. At least one perforated soldering lug 12 for soldering the welding ring 1 on the circuit board is arranged in the middle. In the embodiment, the middle of the welding ring 1 is provided with three welding sheets 12 which are distributed at equal intervals and used for conducting and fixing the welding ring 1 on a circuit board; the three soldering lugs 12 can determine the plane of the circuit board, and are convenient to mount and position.

As shown in fig. 6, in the present embodiment, the lead-out column 41 is an aluminum column, and the fixing plate 42 is a resin plate; the cover plate 4 is in a ring-shaped step shape, the leading-out column 41 is arranged in the center of the fixing plate 42, and a fixing hole 411 for fixing the welding column 3 is arranged in the center of one end, far away from the shell 9, of the leading-out column 41.

To further optimize the above technical solution, at least one protrusion 13 is disposed on the first turned edge 11, and the protrusion 13 corresponds to the soldering lug 12. In this embodiment, there are three arch 13, and the setting of arch 13 is for being used for welding circle 1 to fix a position on the circuit board, and guarantees welding circle 1 and circuit board point contact, leaves the line clearance, guarantees insulating nature, and does benefit to the circulation of air and dispels the heat.

Preferably, the upper connecting piece 6 is an aluminum sheet and is fixed with the leading-out column 41 through laser welding; the upper connecting sheet 6 is provided with upper holes 62 for the permeation of the electrolyte at the periphery. Facilitating electrolyte penetration.

As shown in fig. 4-5, the utility model discloses an electrochemical energy storage device, including cover plate 4, shell 9, roll up core 7, upper connecting piece 6, lower connecting piece 8, welding post 3, welding ring 1 isotructure, wherein cover plate 4 includes extraction post 41 and fixed plate 42, extraction post 41 is the electric conductor, fixed plate 42 is the insulator, extraction post 41 runs through from top to bottom and fixes on fixed plate 42, extraction post 41 end has welding post 3, is a utmost point of device; the welding on the circuit board is convenient. The housing 9 is cylindrical and at least one end is provided with an opening; the insulating fixing plate 42 is hermetically connected with the opening of the shell 9 through a sealing ring 2; the winding core 7 is arranged in the inner cavity of the shell 9; the winding core 7 is in conductive connection with the leading-out column 41 through an upper connecting sheet 6 and is in conductive connection with the other leading-out end of the shell 9 through a lower connecting sheet 8; the welding ring 1 is welded on the shell 9 to become the other pole of the device; the upper connecting sheet 6 and the lower connecting sheet 8 respectively lead out the anode and the cathode of the electrochemical energy storage device, and lead the anode and the cathode to the outside; the device is led out from two ends, has low internal resistance, can be soldered and is convenient for assembling the module.

Example 2:

as shown in fig. 7-8, the present embodiment is further optimized based on embodiment 1, and this embodiment focuses on the improvement compared with embodiment 1, and the same points are not repeated, in this embodiment, an upper hollow column 61 is provided in the middle of the upper connecting sheet 6 for placing an intermediate winding pin hole 71 of the winding core 7, as shown in fig. 15; the periphery of the upper connecting sheet 6 is provided with a part of upper curled edge 63 which is used for fixing the outer ring of the winding core 7 and increasing the shock resistance; the upper connecting sheet 6 is connected with a strip-shaped aluminum sheet for welding with the leading-out column 41 of the cover plate 4. During assembly, after welding and fixing, the upper connecting sheet 6 is bent.

Example 3:

the implementation is further optimized on the basis of the embodiment 2, the embodiment focuses on the improvement compared with the embodiment 2, and the same parts are not described again, in the embodiment, the insulating tube 5 is sleeved outside the upper turned edge 63 of the part arranged around the upper connecting sheet 6. The insulating tube 5 is sleeved in the upper curled edge 63 of the peripheral part of the upper connecting sheet 6, the outer ring of the winding core 7 is sleeved by the upper curled edge 63, the winding core 7 is placed in the shell 9, and the insulating tube 5 plays a role in insulating and fixing the winding core 7 and the shell 9.

Example 4:

as shown in fig. 14, this embodiment is further optimized based on embodiment 3, and this embodiment focuses on explaining the improvement compared to embodiment 3, and the same parts are not repeated, in this embodiment, the soldering post 3 is composed of a first post 31 and a second post 32 disposed at the bottom of the first post 31, and the first post 31 is plated with tin for being soldered on the circuit board; the first pillar 31 has a smaller diameter than the second pillar 32, and the second pillar 32 is installed in the fixing hole 411; the conductive connection to the extraction column 41 is achieved by soldering.

Example 5:

as shown in fig. 9-10, this embodiment is further optimized based on embodiment 4, and this embodiment focuses on the improvement compared with embodiment 4, and the details of the same are omitted, in this embodiment, a lower hollow column 81 for matching with a bottom positioning column 91 of the housing 9 and a middle winding needle hole 71 of the winding core 7 is provided in the middle of the lower connecting piece 8, as shown in fig. 11; the periphery of the lower connecting sheet 8 is provided with a lower curled edge 83 for fixing the outer ring of the winding core 7. A lower hollow column 81 is arranged in the middle of the lower connecting sheet 8 and can be placed into the middle winding needle hole 71 of the winding core 7, and a bottom positioning column 91 of the shell 9 is placed into the hollow column again to play a role in positioning and fixing the winding core 7; the periphery of the lower connecting sheet 8 is provided with a lower curled edge 83 which can fix the outer ring of the roll core 7 and increase the shock resistance.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An electrochemical energy storage device comprising:

the cover plate (4) comprises a leading-out column (41) and a fixing plate (42), the leading-out column (41) is a conductor, the fixing plate (42) is an insulator, and the leading-out column (41) penetrates through and is fixed on the fixing plate (42) up and down;

the shell (9) is cylindrical, an opening is formed in at least one end of the shell, and the insulating fixing plate (42) is connected with the opening of the shell (9) in a sealing mode through a sealing ring (2);

the winding core (7) is arranged in the inner cavity of the shell (9), and the winding core (7) is in conductive connection with the leading-out column (41) through an upper connecting sheet (6) and is in conductive connection with the other leading-out end of the shell (9) through a lower connecting sheet (8); the method is characterized in that: further comprising:

the welding ring (1) is in conductive connection with the shell (9) through welding;

the welding column (3) is in conductive connection with the leading-out column (41) of the cover plate (4) through welding, and the welding ring (1) and the welding column (3) are arranged on the same side of the shell (9).

2. An electrochemical energy storage device as in claim 1, wherein: the tin-plating of welding circle (1), the welding circle (1) is equipped with all around and is used for with shell (9) welding usefulness first turn-up (11), and the centre is provided with one at least and is used for welding circle (1) electrically conductive and fixed foraminiferous soldering lug (12) on the circuit board.

3. An electrochemical energy storage device as in claim 2, wherein: the first turned edge (11) is provided with at least one bulge (13), and the bulge (13) corresponds to the soldering lug (12).

4. An electrochemical energy storage device as in claim 1, wherein: the upper connecting piece (6) is an aluminum sheet and is fixed with the leading-out column (41) through laser welding; the periphery of the upper connecting sheet (6) is provided with upper holes (62) for electrolyte permeation.

5. An electrochemical energy storage device as in claim 4, wherein: an upper hollow column (61) is arranged in the middle of the upper connecting sheet (6) and is used for placing a middle winding pinhole (71) of the winding core (7); the periphery of the upper connecting sheet (6) is provided with a part of upper curled edge (63) which is used for fixing the outer ring of the winding core (7); the upper connecting sheet (6) is connected with a strip-shaped aluminum sheet and is used for being welded with the leading-out column (41) of the cover plate (4).

6. An electrochemical energy storage device as in claim 5, wherein: and an insulating pipe (5) is sleeved outside the upper turned edge (63) of the part arranged around the upper connecting sheet (6).

7. An electrochemical energy storage device as in claim 1, wherein: the leading-out column (41) is an aluminum column, and the fixing plate (42) is a resin plate; the cover plate (4) is in a circular ring-shaped step shape, the leading-out column (41) is arranged at the center of the fixing plate (42), and a fixing hole (411) for fixing the welding column (3) is formed in the center of one end, far away from the shell (9), of the leading-out column (41).

8. An electrochemical energy storage device as in claim 7, wherein: the welding column (3) is composed of a first column (31) and a second column (32) arranged at the bottom of the first column (31), tin is plated on the first column (31), the diameter of the first column (31) is smaller than that of the second column (32), and the second column (32) is installed in the fixing hole (411).

9. An electrochemical energy storage device as in any one of claims 1 to 8, wherein: the lower connecting sheet (8) is an aluminum sheet and is fixed with the shell (9) through laser welding; the periphery of the lower connecting sheet (8) is provided with lower holes (82) for electrolyte permeation.

10. An electrochemical energy storage device as in claim 9, wherein: a lower hollow column (81) matched with a bottom positioning column (91) of the shell (9) and a middle winding pinhole (71) of the winding core (7) is arranged in the middle of the lower connecting sheet (8); the periphery of the lower connecting sheet (8) is provided with a lower curled edge (83) used for fixing the outer ring of the winding core (7).