CN210837948U

CN210837948U - Carbon material grid with surface lead layer

Info

Publication number: CN210837948U
Application number: CN201921771533.4U
Authority: CN
Inventors: 李爱军; 李江; 施美华; 张甲
Original assignee: Zhaoqing Leoch Battery Technology Co Ltd
Current assignee: Zhaoqing Leoch Battery Technology Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-06-23
Anticipated expiration: 2029-10-21

Abstract

A carbon material grid having a top lead layer comprising: carbon grid main part, carbon utmost point ear and the plumbous piece of table, carbon grid main part include the grid frame and connect the transition portion, have seted up a plurality of dentate grooves on the connection transition portion, and lead piece is shown including utmost point ear table plumbous layer and transition table plumbous layer, and the lead layer is shown in the transition is provided with a plurality of dentate filling parts, and each dentate filling part one-to-one corresponds fills in each dentate groove. So, can realize utmost point ear and busbar's welding installation, structural stability is higher, and difficult production is not hard up between the outer cladding of carbon utmost point ear's table lead spare and the busbar, is more difficult to produce the clearance. Can make the transition of table plumbous spare table plumbous layer and grid frame and be connected transition portion homoenergetic and contact better, improve the contact surface area in connection transition position department, its stress bearing area is bigger, more does benefit to the stress transfer, is difficult for taking place stress concentration in local position department, and then makes the mechanical strength of grid main part and the transition position department of being connected of carbon utmost point ear higher, is difficult for taking place the rupture problem.

Description

Carbon material grid with surface lead layer

Technical Field

The utility model relates to a lead-carbon battery grid technical field especially relates to a carbon material grid with lead layer of table.

Background

The lead-carbon battery is a capacitive lead-acid battery, is a technology evolved from the traditional lead-acid battery, and is characterized in that active carbon is added into a negative plate grid of the lead-acid battery, so that the service life of the lead-acid battery can be obviously prolonged.

The lead-carbon battery is a novel super battery, integrates a lead-acid battery and a super capacitor, not only exerts the instant high-capacity charging advantage of the super capacitor, but also exerts the specific energy advantage of the lead-acid battery, and has very good charging and discharging performance, and because the carbon element is added, the negative sulfation phenomenon is prevented, a factor of battery failure in the past is improved, and the service life of the battery is prolonged.

The lead-acid battery negative electrode carbon grid is characterized in that the lead-acid battery negative electrode carbon grid is a traditional negative electrode carbon grid, the traditional negative electrode carbon grid is made of graphite, silicon, titanium, cellulose and other materials through pressing and sintering, the main material is graphite, namely carbon, lead paste is arranged in the negative electrode carbon grid, and the main material is graphite.

To traditional negative pole carbon grid, the material structure of utmost point ear and grid main part mainly has two kinds:

one is that the whole material of negative pole carbon slab lattice is all the same, the material of utmost point ear and grid main part is the same promptly, adopt graphite as the main material, but the utmost point ear of graphite material comes lead or lead alloy material relatively utmost point ear electric conductive property relatively poor, especially to the utmost point ear of electric current high concentration, its drawback can further be enlarged, and can not install through the welding mode with the busbar, can only install through other modes such as joint or spiro union, produce not hard up or produce great clearance even between utmost point ear and the busbar easily, lead to with structural stability, relatively poor.

The other is that the material of the grid main body is graphite, the tab is made of lead or lead alloy, the negative carbon grid is made in a mode that the grid main body is bonded with the tab, or the tab is put into a mold in advance, and then the graphite main material and the tab are pressed and molded together to prepare the negative carbon grid with the grid main body and the tab made of different materials.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, providing a carbon material grid with lead layer of table, utmost point ear and busbar can realize the welding installation, and electric conductive property is better, and the grid main part is higher with the transition position department intensity of being connected of utmost point ear to and can make the difficult emergence rupture of transition position department of being connected of grid main part and utmost point ear.

The purpose of the utility model is realized through the following technical scheme:

a carbon material grid having a top lead layer, comprising:

the carbon grid comprises a carbon grid main body, wherein the carbon grid main body comprises a grid frame and a connecting transition part, the connecting transition part is fixed with the grid frame, a plurality of solder paste filling positions are arranged on the grid frame, the solder paste filling positions are uniformly distributed on the grid frame, and a plurality of tooth-shaped grooves are arranged on the connecting transition part;

the carbon tab is fixed with the connecting transition part;

the carbon lug is coated with the lug surface lead layer, the transition surface lead layer is coated outside the connection transition part, the transition surface lead layer is connected with the lug surface lead layer, the transition surface lead layer is provided with a plurality of tooth-shaped filling parts, and the tooth-shaped filling parts are correspondingly filled in the tooth-shaped grooves one by one.

In one embodiment, the grid frame, the connection transition part and the carbon tab are of an integrally formed structure.

In one embodiment, the surface lead piece is a lead surface lead piece or a lead alloy surface lead piece.

In one embodiment, the grid plate comprises a frame, a plurality of transverse ribs and a plurality of vertical ribs, the frame is fixed to the connecting transition portion, the transverse ribs are arranged in the frame at intervals, two ends of each transverse rib are fixed to the inner side wall of the frame respectively, each vertical rib is fixed to each transverse rib respectively, and two ends of each vertical rib are fixed to the inner side wall of the frame respectively.

In one embodiment, the vertical ribs are perpendicular to the transverse ribs.

In one embodiment, the width of the vertical ribs gradually decreases from a position close to the carbon tab to a position far away from the carbon tab.

In one embodiment, the distance between every two adjacent tooth-shaped grooves is equal.

In one embodiment, the thickness of the carbon tab is equal to the thickness of the connection transition;

the thickness of the connecting transition part is smaller than that of the plate grid frame.

In one embodiment, the tab surface lead layer and the transition surface lead layer are of an integrally formed structure.

In one embodiment, the tooth-shaped groove is a square groove or an arc-shaped groove.

The utility model discloses compare in prior art's advantage and beneficial effect as follows:

the utility model relates to a carbon material grid with lead layer shows, through setting up carbon grid main part, carbon utmost point ear and the lead spare that shows, it sets up at carbon utmost point ear to show lead spare, and carbon grid main part and carbon utmost point ear connection transition position department, so, the busbar can weld on the lead spare that shows that is located carbon utmost point ear outer, can realize the welding installation of utmost point ear and busbar promptly, must carry out the design of installing through modes such as joint or spiro union for traditional full carbon grid, the structural stability who has the carbon material grid that shows lead layer is higher, it is difficult for producing between the lead spare that shows that the outer cladding of carbon utmost point ear and the busbar not hard up, be difficult to produce the clearance, possess more excellent electrochemical performance. For the negative pole carbon grid of traditional different materials, each the cusp filling part one-to-one is filled in each the cusp inslot, can make the lead layer is shown in the transition of table lead spare and the contact surface area of connecting transition position department is improved with the grid frame and being connected transition portion homoenergetic better, and its stress bearing area is bigger, more does benefit to the stress transfer, is difficult for taking place stress concentration in local position department, and then makes the mechanical strength of grid main part and the transition position department of being connected of carbon utmost point ear higher, is difficult for taking place the rupture problem.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a carbon material grid having a top lead layer according to an embodiment of the present invention;

fig. 2 is a schematic structural view of another perspective of a carbon material grid having a top lead layer according to an embodiment of the present invention;

fig. 3 is a partial structural view of the carbon material grid having a top lead layer shown in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 3, a carbon material grid 10 having a top lead layer includes: carbon plate bars main part 100, carbon utmost point ear 200 and table lead part 300, carbon plate bars main part 100 and carbon utmost point ear 200 be the integrated into one piece structure, and the thickness of carbon plate bars main part 100 is greater than the thickness of carbon utmost point ear 200, specifically, in carbon plate bars main part 100 and carbon utmost point ear 200 passed through graphite slurry and pour into the mould, suppress the sintering and obtain, of course, also can adopt the CNC technique to process monoblock graphite main material block and obtain. The surface lead piece 300 is arranged at the carbon tab 200 and the connection transition position of the carbon grid main body 100 and the carbon tab 200, so that the bus bar can be welded on the surface lead piece 300 positioned outside the carbon tab 200, that is, the welding installation of the tab and the bus bar can be realized, compared with the design that the traditional full carbon grid must be installed by clamping or screwing and the like, the structure stability of the carbon grid 10 with a surface lead layer is higher, the surface lead piece 300 coated outside the carbon tab 200 is not easy to loose from the bus bar, and the gap is not easy to generate, so that the electrochemical performance is better, that is, the surface lead piece 300 positioned outside the carbon tab 200 can have better conductive performance compared with the traditional pure carbon tab.

Referring to fig. 1, a carbon grid body 100 includes a grid frame 110 and a connection transition portion 120, the connection transition portion 120 is fixed to the grid frame 110, the grid frame and the connection transition portion are integrally formed, specifically, the thickness of the connection transition portion is smaller than that of the grid frame, similar to the connection transition portion being a thinner handle portion, the grid frame being a thicker body, and similar to the connection transition portion being formed by a structure in which portions of the grid frame are cut out from two sides.

Referring to fig. 1, a plurality of solder paste filling sites 111 are disposed on the grid plate 110, the solder paste filling sites 111 are uniformly distributed on the grid plate 110, and the solder paste filling sites 111 are used for filling solder paste to generate a normal electrochemical reaction. The connecting transition part 120 is provided with a plurality of tooth-shaped grooves 121, and the tooth-shaped grooves 121 are used for filling the surface lead piece 300 so as to reinforce the structural strength of the connecting transition part 120. It should be noted that the connection transition part 120 is the connection transition position of the grid main body and the tab, so that a structural strength design must be provided on the connection transition part 120 to ensure that the grid main body 100 and the carbon tab 200 are not easily broken.

Referring to fig. 1 and 3, a carbon tab 200 is fixed to the connection transition portion 120, specifically, the plate grid, the connection transition portion, and the carbon tab are integrally formed, and specifically, the plate grid, the connection transition portion, and the carbon tab are injected into a mold through graphite slurry, and are pressed and sintered to obtain an integrally formed structure. It should be noted that the carbon tab 200 is not directly contacted with the busbar, that is, the carbon tab 200 is not directly welded with the busbar, the carbon tab 200 is used to function as a conductor on one hand, and is used to be more firmly combined with the surface lead member 300 on the other hand, and the carbon tab 200 functions like a sandwich support member.

Referring to fig. 1, the lead-surface member 300 includes a tab lead-surface layer 310 and a transition lead-surface layer 320, and referring to fig. 3, the tab lead-surface layer 310 is wrapped outside the carbon tab 200, the transition lead-surface layer 320 is wrapped outside the connection transition portion 120, the transition lead-surface layer 320 is connected to the tab lead-surface layer 320, the transition lead-surface layer 320 is provided with a plurality of tooth-shaped filling portions 321, and each tooth-shaped filling portion 321 is filled in each tooth-shaped groove 121 in a one-to-one correspondence manner, so that, compared with a conventional cathode carbon grid made of different materials, each tooth-shaped filling portion 321 is filled in each tooth-shaped groove 121 in a one-to-one correspondence manner, so that the transition lead-surface layer 320 of the lead-surface member 300 can be better contacted with the grid frame 110 and the connection transition portion 120, the contact surface area at the connection transition position is increased, the stress bearing area is larger, and the stress transmission is more facilitated, stress concentration is not easy to occur at a local position, so that the mechanical strength of the connection transition position of the grid main body 100 and the carbon tab 200 is higher, and the problem of breakage is not easy to occur.

In one embodiment, the distance between every two adjacent tooth-shaped grooves is equal; as another example, the thickness of the carbon tab is equal to the thickness of the connection transition portion; the thickness of the connecting transition part is smaller than that of the plate grid frame; for another example, the tab surface lead layer and the transition surface lead layer are of an integrally formed structure; for another example, the tooth-shaped groove is a square groove or an arc-shaped groove, so that the stability of the whole structure can be improved.

In one embodiment, the surface lead element is a lead surface lead element or a lead alloy surface lead element, and the surface lead element can be combined with the carbon surface by adopting the existing technologies such as a molten lead casting molding technology, a lead skin bonding technology, an electroplating technology or a physical vapor deposition technology.

Referring to fig. 2, the grid frame 110 includes a frame 112, a plurality of transverse ribs 113 and a plurality of vertical ribs 114, the frame is fixed to the connection transition portion, the transverse ribs are disposed in the frame at intervals, two ends of each transverse rib are fixed to the inner side wall of the frame, each vertical rib is fixed to each transverse rib, two ends of each vertical rib are fixed to the inner side wall of the frame, and the vertical ribs are perpendicular to the transverse ribs. Further, the width of the vertical ribs is gradually reduced from the position close to the carbon tab to the position far away from the carbon tab, so that the current load of the grid frame 110 close to the carbon tab 200 is larger according to the principle that current flows from bottom to top, and the width of the vertical ribs is gradually reduced from the position close to the carbon tab to the position far away from the carbon tab, so that the electrical performance can be optimized.

The carbon material grid 10 with the surface lead layer is provided with the carbon grid main body 100, the carbon tab 200 and the surface lead piece 300, the surface lead piece 300 is arranged on the carbon tab 200, and the carbon grid main body 100 is connected with the carbon tab 200 at the transition position, so that a bus bar can be welded on the surface lead piece 300 outside the carbon tab 200, namely, the welding installation of the tab and the bus bar can be realized, compared with the design that the traditional full carbon grid is required to be installed by modes such as clamping connection or screw connection, the structural stability of the carbon material grid 10 with the surface lead layer is higher, the surface lead piece 300 coated outside the carbon tab 200 is not easy to loosen from the bus bar, gaps are not easy to be generated, and the electrochemical performance is better. Compared with the traditional negative carbon grid made of different materials, the tooth-shaped filling parts 321 are filled in the tooth-shaped grooves 121 in a one-to-one correspondence manner, so that the transition surface lead layer 320 of the surface lead piece 300 can be better contacted with the grid frame 110 and the connection transition part 120, the contact surface area at the connection transition position is increased, the stress bearing area is larger, the stress transmission is more facilitated, the stress concentration at the local position is not easy to occur, the mechanical strength at the connection transition position of the grid main body 100 and the carbon tab 200 is higher, and the problem of breakage is not easy to occur.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A carbon material grid having a top lead layer, comprising:

the carbon tab is fixed with the connecting transition part;

2. The carbon material grid with a surface lead layer as claimed in claim 1, wherein the grid frame, the connection transition part and the carbon tabs are of an integrally formed structure.

3. The carbon material grid with an epi-lead layer of claim 1, wherein the epi-lead is a lead epi-lead or a lead alloy epi-lead.

4. The carbon material grid with the surface lead layer according to claim 1, wherein the grid frame comprises a frame, a plurality of transverse ribs and a plurality of vertical ribs, the frame is fixed to the connecting transition part, the transverse ribs are arranged in the frame at intervals, two ends of each transverse rib are respectively fixed to the inner side wall of the frame, each vertical rib is respectively fixed to each transverse rib, and two ends of each vertical rib are respectively fixed to the inner side wall of the frame.

5. The carbon material grid with a top lead layer of claim 4, wherein the vertical ribs are perpendicular to the transverse ribs.

6. The carbon material grid having a top lead layer of claim 5, wherein the width of the vertical ribs decreases from near the carbon tab location to far from the carbon tab location.

7. The carbon material grid with a surface lead layer of claim 1, wherein the distance between every two adjacent tooth-shaped grooves is equal.

8. The carbon material grid with a top lead layer of claim 1, wherein the carbon tab has a thickness equal to the thickness of the connection transition;

9. The carbon material grid with the epi-lead layer of claim 1, wherein the tab epi-lead layer and the transition epi-lead layer are of an integrally formed structure.

10. The carbon material grid with the surface lead layer according to claim 1, wherein the tooth-shaped grooves are square grooves or arc-shaped grooves.