Tank cover sealing structure of lead-acid battery of electric bicycle

Abstract

The utility model discloses a groove cover sealing structure of a lead-acid battery of an electric bicycle, which belongs to the field of lead-acid power batteries and comprises a battery groove, a battery cover and a plurality of pole groups arranged side by side in the battery groove. A battery cover is arranged at the top of the battery jar; the pole group comprises a pole plate and a wiring end; the exterior of the polar plate is coated with a partition plate, and the upper surface of the partition plate is coated with a glue layer; a sealant groove is formed in the battery cover and is arranged above the polar plate, and a spacing hollow layer is reserved between the sealant groove and the glue layer. According to the utility model, through the principle that the glue layer is incompatible with the sealant in the sealant groove, the problems of unqualified sealing performance, air leakage and the like caused by the fact that the sealant is sucked into the partition plate from the sealant groove are avoided. And meanwhile, on the premise of ensuring that the total height of the battery cannot be changed, the spacing empty layer can be correspondingly reduced in thickness, so that the height of the polar plate can be correspondingly increased, the reaction area of the battery polar plate can be increased, and the specific energy of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the field of lead-acid power batteries, in particular to a slot cover sealing structure of a lead-acid battery for an electric bicycle. Background Art

[0002] Lead-acid power batteries are widely used in the electric bicycle industry, accounting for more than 90%, and occupying the power battery market for electric bicycles with an absolute advantage. The six cells inside the lead-acid battery of an electric bicycle are mainly purchased with a direct connection structure. When the pole group is cast and welded, the busbars of adjacent cells are directly cast and welded together, which is called a direct connection structure. The advantage of this is that it saves welding materials between cells, reduces battery costs, and also improves production efficiency. However, it also brings certain problems.

[0003] The existing lead-acid power battery busbar direct connection structure requires the battery cover glue groove to be sealed, which has the problem of glue absorption by the partition; the glue absorption by the partition will increase the distance between the busbar and the partition, and the internal space cannot be fully utilized, which hinders the improvement of the battery specific energy; at the same time, the existing lead-acid power battery has the problem of gas cross-talk. Therefore, the market is in urgent need of a lead-acid power battery that can solve the above problems. Utility Model Content

[0004] With regard to the above problems existing in the prior art, the purpose of the present utility model is to provide a slot cover sealing structure of a lead-acid battery for an electric bicycle to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A slot cover sealing structure of a lead-acid battery for an electric bicycle comprises a battery slot, a battery cover and a pole group, wherein a plurality of pole groups are arranged side by side in the battery slot; a battery cover is arranged at the top of the battery slot; the pole group comprises a pole plate and a connection terminal, wherein the connection terminal is arranged at the top of the pole plate;

[0007] The pole plate is coated with a partition on the outside, and a glue layer is coated on the upper surface of the partition; a sealing rubber groove is provided in the battery cover, and the sealing rubber groove is arranged above the pole plate, and a spacer layer is left between the sealing rubber groove and the glue layer.

[0008] As a further solution of the utility model: a battery cover plate is provided on the battery cover.

[0009] As a further solution of the utility model: a safety valve and a wiring terminal are embedded in the battery cover, and the wiring terminal is electrically connected to the connection terminal.

[0010] As a further solution of the utility model: the partition is an ultra-fine glass fiber partition.

[0011] As a further solution of the utility model: the glue layer is A glue.

[0012] As a further solution of the utility model: the sealant filled in the sealant groove is epoxy sealant.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] After casting and welding, the utility model sprays a layer of glue on the surface of the partition. Through the principle that the glue layer is incompatible with the sealant in the sealant groove, the sealant is prevented from being sucked from the glue groove into the partition, causing problems such as unqualified sealing performance and air leakage. At the same time, under the premise that the total height of the battery cannot be changed, the gap layer will reduce the corresponding thickness due to the incompatibility between the glue layer and the sealant. Therefore, the height of the plate can be increased accordingly, and the thickness of the gap layer can be reduced from 8mm to 5mm to 3mm to 2mm. Compared with ordinary batteries, the height of the battery plate of this patent can be increased by 5mm to 7mm, accounting for 3.5% to 5% of the original height of the plate, so that the reaction area of ​​the battery plate can be increased, thereby achieving an increase in the battery specific energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic structural diagram of a slot cover sealing structure of a lead-acid battery for an electric bicycle disclosed in an embodiment.

[0016] Figure 2 The present invention is a side view of a slot cover sealing structure of a lead-acid battery for an electric bicycle disclosed in an embodiment.

[0017] Figure 3 The present invention is a top view of a slot cover sealing structure of a lead-acid battery for an electric bicycle disclosed in an embodiment.

[0018] Figure 4 It is a partial enlarged view of A in the slot cover sealing structure of a lead-acid battery for an electric bicycle disclosed in an embodiment.

[0019] The reference numerals in the figure are: 1. battery slot; 2. battery cover; 3. electrode group; 4. battery cover; 5. safety valve; 6. wiring terminal; 7. electrode plate; 8. partition; 9. glue layer; 10. spacer layer; 11. sealant groove; 12. connection terminal. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", and "connected" should be understood in a broad sense; for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, or an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] See also Figure 1-4 A slot cover sealing structure of a lead-acid battery for an electric bicycle comprises a battery slot 1, a battery cover 2 and a pole group 3. A plurality of pole groups 3 are arranged side by side inside the battery slot 1, and the pole group 3 is used for storing battery power.

[0023] A battery cover 2 is provided at the top of the battery container 1. The battery cover 2 is used for sealing and assembling the battery. At the same time, the battery container 1 and the battery cover 2 are beneficial to protecting the inside of the battery, reducing damage caused by collisions, etc., increasing safety, and facilitating the use of the device.

[0024] The electrode group 3 includes an electrode plate 7 and a connection terminal 12, and the connection terminal 12 is arranged at the top of the electrode plate 7; the connection terminal 12 facilitates the flow of charges and the use of the device.

[0025] The outer part of the electrode plate 7 is covered with a separator 8, and the upper surface of the separator 8 is coated with a glue layer 9. The glue layer 9 avoids the problems of glue absorption and gas cross-talk, increases safety, and facilitates the use of the device.

[0026] A sealant groove 11 is provided in the battery cover 2, and the sealant groove 11 is arranged above the electrode 7, and an interval layer 10 is left between the sealant groove 11 and the glue layer 9; through the principle that the glue layer 9 is incompatible with the sealant in the sealant groove 11, it is avoided that the sealant is sucked from the glue groove into the partition 8, causing problems such as unqualified sealing performance and air leakage.

[0027] At the same time, under the premise of ensuring that the total height of the battery cannot be changed, the gap layer 10 will reduce the corresponding thickness because the glue layer 9 is incompatible with the sealant, so the height of the plate 7 can be increased accordingly, and the thickness of the gap layer 10 can be reduced from 8mm to 5mm to 3mm to 2mm. Compared with ordinary batteries, the height of the battery plate of this patent can be increased by 5mm to 7mm, accounting for 3.5% to 5% of the original height of the plate, so as to increase the reaction area of ​​the battery plate, thereby improving the specific energy of the battery.

[0028] However, due to capillary phenomena and misalignment (inevitable due to the accuracy of the packaging), the separators of ordinary batteries will absorb the epoxy glue from the glue groove into the separator, resulting in unqualified sealing performance, air leakage and other problems. Because of the glue absorption problem, the h1 size cannot be too small, and sufficient space must be left to ensure that there is no glue absorption or less glue absorption. This design determines that the height of the plate is limited, and the battery specific energy is limited under the premise that the total height of the battery cannot be changed.

[0029] After the glue absorption problem is solved in the utility model, the plate height can be increased inside the standard-sized battery, making full use of the isolation distance previously reserved due to the glue absorption problem. By increasing the plate height, the reaction area of ​​the active material can be increased. The increase in the reaction material area can increase the battery capacity, and finally achieve an increase in the battery specific energy. The formula for battery specific energy is as follows:

[0030] Battery specific energy = battery capacity * battery voltage / battery weight;

[0031] At present, the energy density of ordinary batteries is 40Wh / Kg. After adopting this solution, the energy density of batteries can reach 45Wh / Kg to 50Wh / Kg.

[0032] A battery cover plate 4 is provided on the battery cover 2, and the battery cover plate 4 ensures the installation effect of the battery and facilitates the use of the device.

[0033] The battery cover 2 is embedded with a safety valve 5 and a wiring terminal 6, which is electrically connected to the connection terminal 12. The wiring terminal 6 is used for connecting the battery to the outside, which facilitates the use of the device.

[0034] The partition 8 is an ultra-fine glass fiber partition, which is constructed of ultra-fine glass fibers and has a large number of gaps inside, and can absorb various liquids such as acid, water, and glue.

[0035] The material of the glue layer 9 is glue A. A thin layer of glue A is sprayed on the upper part of the partition. Glue A is incompatible with the epoxy glue used to seal the slot cover. Based on the principle that the two glues, epoxy glue and glue A, are incompatible, glue A is first applied to the surface of the partition. After drying for 5 minutes, the plastic shell is sealed according to the normal battery process. After the glue A is dried, it is fixed on the surface of the partition. The epoxy glue cannot be dissolved in contact with it and cannot directly contact the partition. This can effectively prevent the partition from absorbing the epoxy glue in the glue groove into the partition due to capillary phenomenon when the slot cover is sealed, thus solving the problem of glue absorption.

[0036] The sealant groove 11 is filled with epoxy glue, which is used for sealing the battery assembly, increasing safety and facilitating the use of the device.

[0037] After casting and welding, the utility model sprays a layer of glue on the surface of the partition. Through the principle that the glue layer 9 is incompatible with the sealant in the sealant groove 11, it is avoided that the sealant is sucked from the glue groove into the partition 8, causing problems such as unqualified sealing performance and air leakage. At the same time, under the premise that the total height of the battery cannot be changed, the gap layer 10 will reduce the corresponding thickness because the glue layer 9 is incompatible with the sealant. Therefore, the height of the plate 7 can be increased accordingly, and the thickness of the gap layer 10 can be reduced from 8mm to 5mm to 3mm to 2mm. Compared with ordinary batteries, the height of the battery plate of this patent can be increased by 5mm to 7mm, accounting for 3.5% to 5% of the original height of the plate, so that the reaction area of ​​the battery plate can be increased, thereby achieving an increase in the battery specific energy.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A slot cover sealing structure for a lead-acid battery of an electric bicycle, comprising a battery slot (1), a battery cover (2) and a pole group (3), wherein a plurality of pole groups (3) are arranged side by side inside the battery slot (1); a battery cover (2) is arranged at the top of the battery slot (1); the pole group (3) comprises a pole plate (7) and a connection terminal (12), and the connection terminal (12) is arranged at the top of the pole plate (7); and the characteristic is that: The electrode plate (7) is coated with a partition (8) on the outside, and a glue layer (9) is coated on the upper surface of the partition (8); a sealing glue groove (11) is provided in the battery cover (2), and the sealing glue groove (11) is arranged above the electrode plate (7), and a spacer layer (10) is left between the sealing glue groove (11) and the glue layer (9).

2. The slot cover sealing structure of a lead-acid battery for an electric bicycle according to claim 1, characterized in that: The battery cover (2) is provided with a battery cover plate (4).

3. The slot cover sealing structure of the lead-acid battery of an electric bicycle according to claim 2, characterized in that: The battery cover (2) is embedded with a safety valve (5) and a wiring terminal (6), and the wiring terminal (6) is electrically connected to the connection terminal (12).

4. The slot cover sealing structure of the lead-acid battery of an electric bicycle according to claim 3, characterized in that: The partition (8) is an ultra-fine glass fiber partition.

5. The slot cover sealing structure of the lead-acid battery of an electric bicycle according to claim 4, characterized in that: The glue layer (9) is A glue.

6. The slot cover sealing structure of the lead-acid battery of an electric bicycle according to claim 5, characterized in that: The sealant groove (11) is filled with sealant in the form of epoxy glue.

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