CN212750960U

CN212750960U - Power battery for electric bicycle

Info

Publication number: CN212750960U
Application number: CN202021902823.0U
Authority: CN
Inventors: 汤超波
Original assignee: Quanzhou Lingjie Electric Vehicle Co ltd
Current assignee: Quanzhou Lingjie Electric Vehicle Co ltd
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2021-03-19
Anticipated expiration: 2030-09-03

Abstract

The utility model relates to a power battery for electric bicycle, which comprises a housin, cap and group battery, the group battery includes the negative plate, the negative plate includes the negative plate slab, fine enhancement layer of glass, the conducting polymer protective layer, plumbous cream layer and conducting polymer coating, the negative plate slab comprises frame and negative pole ear, wherein the frame has the top frame strip that is located the top, be located the underframe strip of bottom and from the frame strip center downward radiation extension support rib and with support rib vertically and horizontally staggered's arc rib, negative pole ear integrated into one piece is in the center department of top frame strip, the width top-down of support rib reduces in proper order, conducting polymer protective layer adaptation cladding is still equipped with fine enhancement layer of glass outside the frame and between top frame strip and conducting polymer protective layer, just in the lead cream layer solidification shaping frame between conducting polymer protective layer and conducting polymer coating. The utility model discloses an active material plumbous cream layer combines firmly, is difficult for droing, and corrosion-resistant and charge-discharge performance is good.

Description

Power battery for electric bicycle

Technical Field

The utility model belongs to the technical field of XXX, concretely relates to power battery for electric bicycle.

Background

At present, lead storage batteries are widely applied to the fields of automobiles, trains, tractors, motorcycles, electric vehicles, communication, power stations, power transmission, instruments and meters, UPS power supplies, airplanes, tanks, naval vessels, radar systems and the like. With the development of world energy economy and the increasing improvement of people's living standard, lead storage batteries have occupied more than 85% of market share in secondary power supply use.

The main components of the accumulator are polar plates, which are mostly in paste type, i.e. the positive and negative polar plates are made by coating active material on the grid, rolling by a roller press, heating by a drying kiln, curing and drying, wherein the grid is composed of frame ribs and lugs with certain thickness, and transverse ribs and longitudinal ribs criss-cross in the frame. And because the current flows from bottom to top, the upper part of the grid is corroded faster near the position of the lug, and besides graphite serving as a main material in the traditional negative carbon grid, the grid still contains more or less metal raw materials and can participate in redox reaction, so that the carbon grid can be corroded locally to cause the problem that the mechanical supporting capacity of the carbon grid to lead plaster is reduced.

In addition, under the condition of charging with a large current, a cathode of a common lead-acid battery can also generate a large amount of hydrogen, so that the performance of the battery is reduced, the service life of the battery is shortened, and even the battery is directly damaged and loses efficacy.

SUMMERY OF THE UTILITY MODEL

In view of the not enough of prior art, the utility model aims to solve the technical problem that a power battery for electric bicycle is provided, the combination of active material plumbous cream layer is firm, be difficult for droing, and corrosion-resistant and charge-discharge performance is good.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the power battery for the electric bicycle comprises a shell, a shell cover covering an opening at the top of the shell and a battery pack arranged in an inner cavity of the shell, the battery pack comprises a negative plate, the negative plate comprises a negative plate blank, a glass fiber reinforced layer, a conductive polymer protective layer, a lead paste layer and a conductive polymer coating layer, the negative plate blank comprises a frame and negative lugs, wherein the frame is provided with a top frame strip positioned at the top, a bottom frame strip positioned at the bottom, a supporting rib which extends from the center of the top frame strip in a radiation way downwards and an arc rib which is crisscrossed with the supporting rib, the negative electrode lugs are integrally formed at the center of the top frame strip, the width of the supporting ribs is reduced from top to bottom in sequence, the conductive polymer protective layer is adapted to cover the frame, a glass fiber reinforced layer is arranged between the top frame strip and the conductive polymer protective layer, the lead paste layer is cured and molded in the frame and between the conductive polymer protective layer and the conductive polymer coating layer.

Preferably, the lead paste layer is a graphene composite layer.

Preferably, the conductive polymer protective layer and the conductive polymer coating layer are both polypyrrole films.

Preferably, the inner cavity of the shell is provided with an insulating partition plate and is separated by the insulating partition plate to form a plurality of battery cells, positive plates installed at intervals through an insulating plate and the negative plates are arranged in each battery cell, negative plate top negative lugs in each battery cell are connected in series through a negative busbar, positive lugs at the top ends of the positive plates in each battery cell are connected in series through a positive busbar, the positive busbar and the negative busbar between adjacent battery cells are connected together in a cross-bridge mode through a plane, a positive post is arranged on the positive busbar in one battery cell, and a negative post is arranged on the negative busbar in one battery cell.

Preferably, a power interface is arranged on the shell cover, and a fuse is connected in series between the power interface and the positive pole column and between the power interface and the negative pole column.

Preferably, a glass fiber reinforced layer is further arranged between the lower section of each supporting rib and the conductive polymer protective layer.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses power battery includes the negative plate, and the support rib on the negative plate is radial arrangement and its width is crescent from bottom to top, can make the rib that is close to utmost point ear intensive, does benefit to utmost point ear to the gathering and the conduction of electric current, has still reduced the voltage drop in the polar plate simultaneously, makes the battery have the ability that high magnification discharges; the negative plate comprises a negative plate blank, a conductive polymer protective layer and a lead plaster layer, wherein the conductive polymer protective layer is coated outside the frame in an adaptive mode, the lead plaster layer is formed between the conductive polymer protective layer and the conductive polymer coating layer in a curing mode, the corrosion resistance of the negative plate blank is further improved through the conductive polymer protective layer, meanwhile, the binding force between the plate blank and an electrode active material layer is greatly enhanced by utilizing the three-dimensional structure of the conductive polymer, the falling is reduced, the charging acceptance capacity is improved, the cycle life of the power battery is further prolonged, the negative electrode of the power battery can have the characteristic of high rate capability through the conductive polymer coating layer, the hydrogen evolution effect is well inhibited, and the performance. Additionally, the utility model discloses still be equipped with fine enhancement layer of glass between top frame strip and conducting polymer protective layer, the corrosion resisting property at reinforcing negative plate blank top, still be equipped with fine enhancement layer of glass between the hypomere of each support rib and conducting polymer protective layer, guarantee the holding power to the diachylon layer, the preferred graphite alkene combined material layer that adopts on diachylon layer, make the negative plate form a electric network that has good electric conductivity, improve circular telegram receptivity, reach the shortcoming that improves known battery and need charge for a long time, promote battery cycle life's technical efficiency, avoid simultaneously that excessive discharge or degree of depth discharge state take place the negative pole vulcanization problem easily down.

Drawings

Fig. 1 is a top view of the power battery of the present invention.

Fig. 2 is a top view of the housing and the battery pack of the present invention.

Fig. 3 is the structure schematic diagram of the negative plate blank of the present invention.

Fig. 4 is a partial enlarged view of P shown in fig. 3.

Fig. 5 is a schematic view of the structure of the negative plate layer of the present invention.

The labels in the figure are: 10. a housing; 20. a shell cover; 21. a power interface; 30. a battery pack; 31. a positive post; 32. a negative pole post; 33. a fuse; 101. a negative plate blank; 102. a glass fiber reinforced layer; 103. a conductive polymer protective layer; 104. a lead paste layer; 105. a conductive polymer coating layer; 106. a glass fiber reinforced layer B; 1011. a negative tab; 1012. a top frame strip; 1013. a bottom frame strip; 1014. and (4) supporting ribs.

Detailed Description

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

As shown in fig. 1-5, this embodiment provides a power battery for electric bicycle, including casing 10, lid close casing 10 open-top department's cap 20 and place the group battery 30 of casing 10 inner chamber in, be equipped with power source 21 on the cap 20, it has fuse 33 to establish ties between power source 21 and the positive post 31 of group battery 30 and negative pole post 32, avoids appearing short circuit in the twinkling of an eye or when leading to the short circuit because of uncomfortable type chooses for use in the discharge process through fuse 33, causes the too big damage starting battery of electric current, prolongs the life of power battery product, reduces risk and the potential safety hazard that the user's maloperation brought simultaneously.

In this embodiment, the inner cavity of the housing 10 is provided with insulating spacers and is separated by the insulating spacers to form a plurality of battery cells, each battery cell is provided with a positive plate and a negative plate which are installed at intervals through an insulating plate, the negative plate top negative lugs 1011 in each battery cell are connected in series through a negative bus bar, the positive lugs at the top of the positive plate in each battery cell are connected in series through a positive bus bar, the positive bus bar and the negative bus bar between adjacent battery cells are connected in a bridge-crossing manner through a plane, and the bus bars are formed by one-time cast welding.

The positive electrode bus bar in one of the battery cells is provided with a positive electrode post 31, the negative electrode bus bar in one of the battery cells is provided with a negative electrode post 32, and the positive electrode post 31 and the negative electrode post 32 are the positive electrode post 31 and the negative electrode post 32 of the battery pack 30.

In this embodiment, the negative plate includes negative plate blank 101, glass fiber reinforced layer 102, conducting polymer protective layer 103, lead plaster layer 104 and conducting polymer coating 105, negative plate blank 101 comprises frame and negative pole ear 1011, wherein the frame has top frame strip 1012 at the top, bottom frame strip 1013 at the bottom, support rib 1014 that extends from top frame strip 1012 center downward radiation and the arc rib with support rib 1014 vertically and horizontally staggered, negative pole ear 1011 integrated into one piece is in the center department of top frame strip 1012, the width of support rib 1014 reduces in proper order from top to bottom, so can make the rib that is close to the utmost point ear department intensive, do benefit to the gathering and the conduction of negative pole ear to the electric current, still reduced the voltage drop in negative plate blank 101 simultaneously, made the battery have the ability that the high magnification discharges.

In this embodiment, the conductive polymer protection layer 103 is coated outside the frame in a matching manner, and the glass fiber reinforced layer 102 is further arranged between the top frame 1012 and the conductive polymer protection layer 103, so that on one hand, the corrosion resistance of the top of the negative plate blank 101 is enhanced through the glass fiber reinforced layer 102, on the other hand, the corrosion resistance of the negative plate blank 101 is further improved through the conductive polymer protection layer 103, and meanwhile, the binding force between the negative plate blank 101 and the lead plaster layer 104 is greatly enhanced by utilizing the three-dimensional structure of the conductive polymer, so that the falling is reduced, the charge acceptance capacity is improved, and the cycle life of the power battery is further. Further, in order to enhance the overall structural strength of the negative plate blank 101, a glass fiber reinforced layer B106 is further disposed between the lower segment of each support rib 1014 and the conductive polymer protective layer 103, so as to ensure the supporting capability of the lead plaster layer 104.

The lead plaster layer 104 is a graphene composite material layer, the lead plaster layer 104 is solidified and formed in the frame and between the conductive polymer protective layer 103 and the conductive polymer coating layer 105, so that the negative plate forms an electric network with excellent conductivity, the power-on receiving capacity is improved, the defect that the known battery needs to be charged for a long time is overcome, the technical effect of prolonging the cycle life of the battery is improved, and the problem of negative vulcanization easily caused in an over-discharge or deep-discharge state is avoided. The conductive polymer protective layer 105 and the conductive polymer coating layer 103 are both polypyrrole films, and the negative plate of the power battery has the characteristic of high rate capability through the conductive polymer coating layer 105, and has a very good hydrogen evolution inhibition effect, so that the performance of the battery is improved.

Having shown and described the fundamental principles and the principal features of the invention and its advantages, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. Power battery for electric bicycle, its characterized in that: comprises a shell, a shell cover covering an opening at the top of the shell and a battery pack arranged in an inner cavity of the shell, the battery pack comprises a negative plate, the negative plate comprises a negative plate blank, a glass fiber reinforced layer, a conductive polymer protective layer, a lead paste layer and a conductive polymer coating layer, the negative plate blank comprises a frame and negative lugs, wherein the frame is provided with a top frame strip positioned at the top, a bottom frame strip positioned at the bottom, a supporting rib which extends from the center of the top frame strip in a radiation way downwards and an arc rib which is crisscrossed with the supporting rib, the negative electrode lugs are integrally formed at the center of the top frame strip, the width of the supporting ribs is reduced from top to bottom in sequence, the conductive polymer protective layer is adapted to cover the frame, a glass fiber reinforced layer is arranged between the top frame strip and the conductive polymer protective layer, the lead paste layer is cured and molded in the frame and between the conductive polymer protective layer and the conductive polymer coating layer.

2. The power battery for electric bicycles of claim 1, wherein: the lead plaster layer is a graphene composite material layer.

3. The power battery for electric bicycles of claim 1, wherein: the conductive polymer protective layer and the conductive polymer coating layer are both polypyrrole films.

4. The power battery for electric bicycles of claim 1, wherein: the casing inner chamber is equipped with insulating barrier and separates by insulating barrier and form a plurality of battery cell check, be equipped with in each battery cell check through the mutual interval positive plate of installation of insulation board with the negative plate, negative plate top negative pole ear in each battery cell check is established ties together through the negative pole busbar, and the positive pole ear in positive plate top in each battery cell check is established ties together through anodal busbar, and anodal busbar between the adjacent battery cell check is striden the bridge connection together through the plane with the negative pole busbar, has anodal post on the anodal busbar in one of them battery cell check, has the negative pole post on the negative pole busbar in one of them battery cell check.

5. The power battery for electric bicycles of claim 4, wherein: the shell cover is provided with a power interface, and fuses are connected in series between the power interface and the positive pole column and between the power interface and the negative pole column.

6. The power battery for electric bicycles of claim 1, wherein: and a glass fiber reinforced layer is arranged between the lower section of each supporting rib and the conductive polymer protective layer.