CN213692277U

CN213692277U - Lead-acid storage battery

Info

Publication number: CN213692277U
Application number: CN202021967983.3U
Authority: CN
Inventors: 杨滔; 熊正林; 胡曙; 李焙
Original assignee: Hubei Nandu New Energy Research Co Ltd; Zhejiang Narada Power Source Co Ltd
Current assignee: Hubei Nandu New Energy Research Co Ltd; Zhejiang Narada Power Source Co Ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-07-13
Anticipated expiration: 2030-09-10

Abstract

The utility model discloses a lead-acid storage battery, which relates to the technical field of batteries and comprises a plastic shell and a pole group arranged in the plastic shell; the pole group comprises a plurality of single-group pole groups connected in series; the single group of poles comprises more than one positive pole piece, more than one negative pole piece, more than one bus bar and more than one partition board, as well as positive pole lugs arranged on the positive pole pieces and negative pole lugs arranged on the negative pole pieces; a partition plate is arranged between the adjacent positive plate and the adjacent negative plate, and the positive lug and the negative lug are respectively arranged at two ends of the partition plate; the plastic shell comprises a battery jar for assembling the pole group; one end of the battery jar is sequentially provided with a first battery cover and a first cover plate; the other end of the battery jar is sequentially provided with a second battery cover and a second cover plate; and the first battery cover and the second battery cover are respectively provided with a bus bar groove matched with the bus bars on the pole group. Aiming at the technical problem of low utilization rate of the lead plaster at the bottom of the pole group, the lead plaster utilization rate at the bottom of the pole group can be improved.

Description

Lead-acid storage battery

Technical Field

The utility model relates to the technical field of batteries, concretely relates to lead acid battery.

Background

The lead-acid storage battery structure comprises a battery shell (made of ABS or PP materials in common use), a pole group (composed of a positive plate, a negative plate, a busbar and a partition plate), a connecting piece, electrolyte and the like; the electrode group is an important core component of the battery, and the positive and negative plates in the electrode group are connected in parallel, as shown in the attached figures 6-9, the structure of the electrode group is characterized in that the production operation is simple and easy, the realization is very easy, the electrode lugs are connected by a bus bar at the upper part at the same time, the bus bar is not arranged at the bottom, when the external power supply is connected, the current flows through the negative connecting piece through the positive connecting piece to obtain the current, and the current is long, because the current at the upper part of the electrode group is large, and the current at the lower part is relatively small, the utilization rate of the active substances above and below the electrode group is greatly different, the utilization rate of the lead paste at; the lead plaster utilization rate at the bottom of the pole group is low, the lead plaster utilization rate is poor in uniformity, the grid corrosion rate is high, and the charging energy consumption is higher; the consistency of the battery is poor; ultimately resulting in a short battery cycle life.

Disclosure of Invention

Technical problem to be solved by the utility model

To the technical problem that lead acid battery utmost point crowd bottom lead plaster utilization ratio is low, the utility model provides a lead acid battery, it can improve the lead plaster utilization ratio of battery utmost point crowd bottom.

Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

a lead-acid storage battery comprises a plastic shell and a pole group arranged in the plastic shell; the pole group comprises a plurality of single-group pole groups connected in series; the single group of poles comprises more than one positive pole piece, more than one negative pole piece, more than one bus bar and more than one partition board, as well as positive pole lugs arranged on the positive pole pieces and negative pole lugs arranged on the negative pole pieces; a partition plate is arranged between the adjacent positive plate and the adjacent negative plate, and the positive lug and the negative lug are respectively arranged at two ends of the partition plate; the bus bars comprise a first bus bar and a second bus bar, the first bus bar is used for connecting a plurality of adjacent positive lugs at the same end of the partition board, and the second bus bar is used for connecting a plurality of adjacent negative lugs at the same end of the partition board; the plastic shell comprises a battery jar for assembling the pole group; one end of the battery jar is sequentially provided with a first battery cover and a first cover plate; the other end of the battery jar is sequentially provided with a second battery cover and a second cover plate; and the first battery cover and the second battery cover are respectively provided with a bus bar groove matched with the bus bars on the pole group.

Optionally, a plastic casing partition plate for separating adjacent single-group pole groups is arranged in the battery jar.

Optionally, a first sealing element is arranged at one end of the battery jar, a first sealing groove is formed in the first battery cover, and the first sealing element is matched with the first sealing groove, so that one end of the battery jar is sealed with the first battery cover; the other end of the battery jar is equipped with the second sealing member, the second battery lid is equipped with the second seal groove, the second sealing member and the second seal groove phase-match to make the other end of battery jar with the second battery lid is sealed.

Optionally, the first bus bar and the second bus bar located on the two sides of the top of the electrode group and located at the same end of the partition board are respectively provided with a positive pole column and a negative pole column.

Optionally, the first battery cover is provided with vent holes corresponding to the positions and the number of the single group of electrode groups.

Optionally, a plurality of clamping pieces are arranged on the second cover plate, a plurality of clamping positions are arranged on the second battery cover, and the clamping pieces are matched with the clamping positions.

Optionally, a notch is arranged at the sealing connection position of the first cover plate and the second battery cover.

Optionally, the first battery cover is provided with a positive pole column groove and a negative pole column groove which are correspondingly and respectively matched with the positive pole column and the negative pole column of the pole group.

Optionally, a plastic-casing partition plate is disposed between the first bus bar and the second bus bar which are located at the same adjacent end of the partition plate and are not connected to each other, and a plastic-casing partition plate is disposed between the third bus bar which is located at the same adjacent end of the partition plate and are not connected to each other.

A lead-acid battery manufacturing method, a lead-acid battery according to any one of the above, comprising: a plurality of positive lugs of the single-group pole group are welded on the first bus bar; welding a plurality of negative electrode lugs of the single-group electrode group on the second bus bar; according to the number of single group of pole groups forming the pole group, welding two adjacent first bus bars and second bus bars positioned at the same end of the partition board to form a third bus bar; the first bus bar and the second bus bar are positioned on two sides of the top of the pole group and positioned at the same end of the partition board, and the positive pole column and the negative pole column are respectively welded on the first bus bar and the second bus bar; putting the pole group into a plastic shell, and filling electrolyte into the pole group; and sealing the plastic shell.

Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

when the positive plate and the negative plate are arranged, the separator is used for isolating the positive plate and the negative plate to prevent short circuit; when the anode tab is arranged, the anode tab on the anode piece is intensively arranged at one end of the separator, and the cathode tab of the cathode piece is arranged at the other end (in the direction far away from one end of the separator); the negative electrode lugs on the adjacent negative electrode plates at one end of the partition plates are communicated through a first bus bar and used for passing current; and the positive lugs on the positive plates which are positioned at the other ends of the plurality of clapboards and are isolated by the plurality of clapboards and are crossed between the adjacent negative plates are communicated through the first bus bar for passing current.

Two adjacent first busbars positioned at the same end of the partition board are connected to form the second busbar; and the first bus bars which are positioned at the two sides of the pole group and are connected with the positive pole lugs and the first bus bars which are connected with the negative pole lugs are respectively provided with a positive pole column and a negative pole column.

The current is enabled to flow to the negative plate or the positive plate at the other end of the separator after passing through the whole positive plate or the negative plate at one end of the separator through the separator, or the first bus bar and the second bus bar at the two ends of the positive plate or the negative plate; so that the current flows through each part of the pole group to achieve relative uniformity, and the lead paste utilization rate at the bottom of the pole group is greatly improved; the upper and lower uniformity of the pole group is improved, and the service life of the lead-acid storage battery is prolonged.

The existing pole group connection mode is changed, the lead paste utilization rate of the bottom of the pole group is improved, the required lead paste amount is reduced, and the cost is lower; the battery charging is more uniform, and the electric energy utilization rate is high; the utilization rate of the battery pole group lead paste is improved, and the charging energy consumption of the battery is reduced; the required lead paste amount is reduced, so that the cost is reduced; the sealant beating times are reduced, the production efficiency is improved, and the battery sealing performance is better; the cycle life of the battery is prolonged, and the consistency of the battery is improved.

And the first battery cover and the second battery cover of the plastic shell are respectively provided with a bus bar groove matched with the bus bars on the pole group, and the bus bars are used for being matched with the first bus bar, the second bus bar and the third bus bar which are respectively positioned at two ends of the pole group. The assembly requirement of the improved pole group structure is met, the utilization rate of the lead paste is improved, the consistency of the battery is improved, and the cost is reduced.

Drawings

Fig. 1 is a schematic perspective view of relative positions of positive and negative electrode plates and a partition plate of a lead-acid storage battery electrode group according to an embodiment of the present invention.

Fig. 2 is a front view of a lead-acid storage battery plate group provided by the embodiment of the present invention.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a front view of relative position structures of positive and negative plates and a partition plate of a lead-acid storage battery plate group according to an embodiment of the present invention.

Fig. 5 is a top view of a lead-acid storage battery plate group according to an embodiment of the present invention.

Fig. 6 is a top view of a conventional pole group.

Fig. 7 is a perspective view of the relative position structure of positive and negative electrode plates and separators of a conventional electrode group.

Fig. 8 is a front view of a conventional pole group structure.

Fig. 9 is a schematic structural diagram of a conventional lead-acid battery plastic case.

Fig. 10 is an explosion diagram of a plastic shell structure of a lead-acid storage battery according to an embodiment of the present invention.

Fig. 11 is an exploded view of a lead-acid battery according to an embodiment of the present invention.

Fig. 12 is a second explosion diagram of a lead-acid battery according to an embodiment of the present invention.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description of the embodiments with reference to the accompanying drawings 1-5, 10-12.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and between the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, which is all within the scope of the present invention.

Example 1

A lead-acid storage battery comprises a plastic shell and a pole group arranged in the plastic shell; the pole group comprises a plurality of single-group pole groups 11 connected in series; the single group of poles 11 comprises more than one positive pole piece 2, more than one negative pole piece 1, more than one bus bar 4 and more than one separator 3, as well as a positive pole lug 202 arranged on the positive pole piece 2 and a negative pole lug 102 arranged on the negative pole piece 1; a partition plate 3 is arranged between the adjacent positive plate 2 and the adjacent negative plate 1, and the positive tab 202 and the negative tab 102 are respectively arranged at two ends of the partition plate 3; the bus bar 4 comprises a first bus bar 401 and a second bus bar 402, the first bus bar 401 is used for connecting a plurality of adjacent positive lugs 202 at the same end of the separator 3, and the second bus bar 402 is used for connecting a plurality of adjacent negative lugs 102 at the same end of the separator 3; the plastic housing includes a battery well 803 for assembling the pole group; one end of the battery jar 803 is provided with a first battery cover 802 and a first cover plate 801 in sequence; the other end of the battery jar 803 is provided with a second battery cover 804 and a second cover plate 805 in sequence; and the first battery cover 802 and the second battery cover 804 are respectively provided with a bus bar groove matched with the bus bar 4 on the pole group.

The single group of the pole groups 11 are connected in series to form the pole group, and the bus bars 4 are respectively arranged at two ends of the pole group, so that when current flows, the current is forced to pass through from one end of the positive plate 2 to the other end of the negative plate 1, the utilization rate of lead paste is improved, and the uniformity of the battery is improved.

The conventional pole group structure is shown in fig. 6-8, and the corresponding plastic case structure is shown in fig. 9, and includes a battery jar body 703, a battery cover 702, and a cover plate 701, which are sequentially combined. The buses 4 are located at one end of the plate group, which is long in time, low in lead paste utilization rate, low in charging efficiency and high in cost.

As shown in fig. 1, when the positive plate 2 and the negative plate 1 are arranged, the separator 3 is used for separating the positive plate 2 from the negative plate 1 to prevent short circuit; in the arrangement, as shown in fig. 2-4, the positive tab 202 on the positive plate 2 is intensively arranged at one end of the separator 3, and the negative tab 102 of the negative plate 1 is arranged at the other end (in the direction away from one end of the separator 3) of the separator 3; the negative electrode tabs 102 on a plurality of adjacent negative electrode sheets 1 at one end of the plurality of separators 3 are communicated through a first bus bar 401 and used for passing current; and the positive lugs 202 are positioned at the other ends of the plurality of separators 3, isolated by the plurality of separators 3 and arranged on the plurality of positive plates 2 between the adjacent negative plates 1 in a crossed manner, and are communicated through a first bus bar 401 for passing current.

With reference to fig. 4 and 5, two adjacent first busbars 401 located at the same end of the partition 3 are connected to form the second busbar 402; the first bus bar 401 connected with the positive tab 202 and the first bus bar 401 connected with the negative tab 102 on two sides of the pole group are respectively provided with a positive post 201 and a negative post 101.

After passing through the whole positive plate 2 or negative plate 1 at one end of the separator 3, the current is made to flow to the negative plate 1 or positive plate 2 at the other end of the separator 3 through the first bus bar 401 and the second bus bar 402 at both ends of the positive plate 2 or negative plate 1; so that the current flows through each part of the pole group to achieve relative uniformity, and the lead paste utilization rate at the bottom of the pole group is greatly improved; the upper and lower uniformity of the pole group is improved, and the service life of the lead-acid storage battery is prolonged.

In order to match the above-mentioned pole group structure, in the lead-acid battery plastic case provided in this embodiment, the first battery cover 802 and the second battery cover 804 are respectively provided with a bus slot matched with the bus bar 4 on the pole group, so as to be adapted to the first bus bar 401, the second bus bar 402 and the third bus bar 403 respectively located at two ends of the pole group. The assembly requirement of the improved pole group structure is met, the utilization rate of the lead paste is improved, the consistency of the battery is improved, and the cost is reduced.

In an alternative embodiment, a plastic-casing partition 8033 for separating the adjacent single-group pole groups 11 is disposed in the battery jar 803. The electrode groups are arranged in the battery jar 803, and a plastic shell clapboard 8033 is arranged between the adjacent single-group electrode groups 11 for fixing and supporting the electrode group structure and simultaneously ensuring the integral firmness of the battery plastic shell.

The bus bar groove includes a first bus bar groove 8024 on the first battery cover 802, and a second bus bar groove 8042 on the second battery cover 804. The first bus groove 8024 and the second bus groove 8042 are respectively matched with bus bars at two ends of the pole group and used for assembling and sealing the pole group.

In an optional embodiment, a first sealing member 8031 is disposed at one end of the battery jar 803, the first battery cover 802 is disposed with a first sealing groove 8025, and the first sealing member 8031 is matched with the first sealing groove 8025, so that one end of the battery jar 803 is sealed with the first battery cover 802; the other end of the battery jar 803 is provided with a second sealing element 8032, the second battery cover 804 is provided with a second sealing groove 8043, and the second sealing element 8032 is matched with the second sealing groove 8043, so that the other end of the battery jar 803 is sealed with the second battery cover 804.

By the matching relationship, the sealing of the battery jar 803 and the first battery cover 802 and the second battery cover 804 is realized structurally; in order to further enhance the sealing effect, glue can be applied to the sealing position.

In an alternative embodiment, the first bus bar 401 and the second bus bar 402, which are located on both sides of the top of the electrode group and located at the same end of the separator 3, are respectively provided with the positive electrode post 201 and the negative electrode post 101.

In an optional embodiment, the positive pole 201 and the negative pole 101 are matched with a plastic cover plate structure. The structure of the positive pole column 201 and the structure of the negative pole column 101 are limited through the plastic shell cover plate structure, so that the pole group is stably and reliably connected with the plastic shell.

The first battery cover 802 and the second battery cover 804 are respectively provided with a first protrusion 8041 and a second protrusion 8045. The bus bars 4 at the two ends of the single group of electrode group 11 divide the two end faces of the single group of electrode group 11 into two parts, and after the electrode group is placed in the battery jar 803, the first protrusion 8041 and the second protrusion 8045 on the first battery cover 802 and the second battery cover 804 are respectively matched with the two parts divided on the two end faces of the single group of electrode group 11 for sealing. The first protrusion 8041 and the second protrusion 8045 on the first battery cover 802, similar to the second battery cover 804, are not shown in fig. 10-12.

In an optional embodiment, the first battery cover 802 is provided with vent holes 8023 corresponding to the positions and the number of the single group of poles 11. The exhaust holes 8023 are used to exhaust hydrogen and oxygen released from the electrolyte at the respective single group clusters 11. The first battery cover 802 is also provided with a safety valve.

In an optional embodiment, a plurality of engaging members 8051 are disposed on the second cover plate 805, a plurality of engaging positions 8044 are disposed on the second battery cover 804, and the engaging members 8051 are matched with the engaging positions 8044. The second cover plate 805 is connected to the second battery cover 804, and the sealing connection between the second cover plate and the second battery cover is structurally realized through the matching relationship between the clamping piece 8051 and the clamping position 8044, so that the joint can be glued for improving the sealing performance.

Optionally, a notch is formed at the sealing connection position of the first cover plate 801 and the second battery cover 802. When the battery is charged and discharged, the electrolyte soaked in the battery jar 803 pole group generates gas, and the gas is discharged through the vent hole 8023 on the second battery cover 802 and the notch on the first cover plate 801 in sequence.

In an optional embodiment, the first battery cover 802 is provided with a positive post groove 8022 and a negative post groove 8021 which are respectively matched with the positive post 201 and the negative post 101 of the pole group. After the pole group is placed in the battery well 803, the first battery cover 802 is assembled to one end of the battery well 803, and the positive pole 201 can be inserted into the positive pole well 8022 and the negative pole 101 can be inserted into the negative pole well 8021.

In an alternative embodiment, a plastic-shell partition 8033 is disposed between the first bus bar 401 and the second bus bar 402, which are not connected to each other, adjacent to the same end of the partition 3, and between the third bus bar 403, which is not connected to each other, adjacent to the same end of the partition 3.

The single group of poles 11 is fixed through a plastic shell partition 8033, and the single group of poles 11 comprises a plurality of negative pole pieces 1 connected through the same second bus bar 402; and a plurality of positive electrode tabs 2 connected by the same first bus bar 401. The adjacent single group of poles 11 is fixedly supported by a plastic shell partition 8033.

In an alternative embodiment, a plastic partition groove 8046 is formed on each of the first battery cover 802 and the second battery cover 804. The molded case partition plate groove 8046 is matched with the molded case partition plate 8033 to play a role in sealing; molded housing barrier slots 8046 on the first battery cover 802 and the second battery cover 804, similar to the second battery cover 804, are not shown in fig. 10-12.

A lead-acid storage battery manufacturing method is characterized in that the lead-acid storage battery according to any one of the above technical schemes comprises the following steps: a plurality of positive lugs 202 of the single-group pole group 11 are welded on the first bus bar 401; a plurality of negative electrode tabs 102 of the single-group electrode group 11 are welded on the second bus bar 402; according to the number of single group of pole groups 11 forming the pole group, two adjacent first bus bars 401 and second bus bars 402 positioned at the same end of the separator 3 are welded to form the third bus bar 403; the first bus bar 401 and the second bus bar 402 which are positioned at two sides of the top of the pole group and at the same end of the separator 3 are respectively welded with the positive pole column 201 and the negative pole column 101; putting the pole group into a plastic shell, and filling electrolyte into the pole group; and sealing the plastic shell.

Optionally, the separator 3 is made of PP, PE or AGM. A PP (polypropylene) separator, a PE (polyethylene) separator, an AGM (absorbent glass fiber separator), or a microglass separator and other composite separators may be used in the separator 3 described in this embodiment.

Alternatively, the area of the separator 3 is larger than that of the positive electrode tab 2 or the negative electrode tab 1, so that the positive electrode tab 2 and the negative electrode tab 1 are not in contact with each other. The separator 3 plays a role of isolation so that the positive plate 2 and the negative plate 1 are not in contact with each other, and short circuit of the positive plate 2 and the negative plate 1 is prevented.

Alternatively, two adjacent first busbars 401 and second busbars 402 at the same end of the partition 3 are connected to form the third busbar 403. Alternatively, a plurality of adjacent single-group pole groups 11 are connected by a third bus bar 403 to form the pole group. The adjacent single-group pole groups 11 are interconnected through the third bus bar 403, so that direct current series connection circulation of the single-group pole groups 11 is realized, the arrangement is realized, the current flows through each part of the pole groups, the relative uniformity is achieved, and the lead paste utilization rate at the bottoms of the pole groups is greatly improved; the upper and lower uniformity of the pole group is improved, and the service life of the lead-acid storage battery is prolonged.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A lead-acid storage battery is characterized by comprising a plastic shell and a pole group arranged in the plastic shell;

the pole group comprises a plurality of single-group pole groups connected in series;

the single group of poles comprises more than one positive pole piece, more than one negative pole piece, more than one bus bar and more than one partition board, as well as positive pole lugs arranged on the positive pole pieces and negative pole lugs arranged on the negative pole pieces;

a partition plate is arranged between the adjacent positive plate and the adjacent negative plate, and the positive lug and the negative lug are respectively arranged at two ends of the partition plate;

the bus bars comprise a first bus bar and a second bus bar, the first bus bar is used for connecting a plurality of adjacent positive lugs at the same end of the partition board, and the second bus bar is used for connecting a plurality of adjacent negative lugs at the same end of the partition board;

the plastic shell comprises a battery jar for assembling the pole group; one end of the battery jar is sequentially provided with a first battery cover and a first cover plate; the other end of the battery jar is sequentially provided with a second battery cover and a second cover plate; and the first battery cover and the second battery cover are respectively provided with a bus bar groove matched with the bus bars on the pole group.

2. The lead-acid battery of claim 1, wherein a plastic-shell separator is disposed in the battery container for separating adjacent single-group pole groups.

3. The lead-acid storage battery as claimed in claim 1, wherein one end of the battery jar is provided with a first sealing member, the first battery cover is provided with a first sealing groove, and the first sealing member is matched with the first sealing groove so as to seal one end of the battery jar with the first battery cover; the other end of the battery jar is equipped with the second sealing member, the second battery lid is equipped with the second seal groove, the second sealing member and the second seal groove phase-match to make the other end of battery jar with the second battery lid is sealed.

4. The lead-acid storage battery according to claim 1, wherein the first bus bar and the second bus bar, which are located on both sides of the top of the plate group and on the same end of the partition plate, are provided with a positive post and a negative post, respectively.

5. The lead-acid storage battery as claimed in claim 1, wherein the first battery cover is provided with vent holes corresponding to the positions and the number of the single group of poles.

6. The lead-acid storage battery as claimed in claim 1, wherein said second cover plate has a plurality of engaging members thereon, said second battery cover has a plurality of engaging positions thereon, and said engaging members and said engaging positions are matched.

7. The lead-acid storage battery of claim 1, characterized in that the sealed connection between the first cover plate and the second battery cover is provided with a notch.

8. The lead-acid storage battery according to claim 4, characterized in that the first battery cover is provided with a positive pole groove and a negative pole groove which are correspondingly matched with the positive pole and the negative pole of the pole group respectively.

9. The lead-acid battery of claim 1, wherein a plastic-casing separator is disposed between adjacent unconnected first and second busbars and between adjacent unconnected third busbars.