CN112310410A

CN112310410A - Grid of lead-acid battery and lead-acid battery

Info

Publication number: CN112310410A
Application number: CN201910713856.6A
Authority: CN
Inventors: 杨裕生
Original assignee: Shandong Niuqianli Power Technology Co ltd
Current assignee: Shandong Niuqianli Power Technology Co ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2021-02-02

Abstract

The invention relates to a grid of a lead-acid battery and the lead-acid battery. The grid includes: the grid-shaped current collector comprises a plurality of first ribs extending along a preset direction and a tab, and the tab is connected with the first ribs; and the frame, the frame is including a plurality of support bars and the frame that link together, first rib with the support bar is alternately, many first ribs with the one end respectively with the frame base straining, first rib local embedding at least in the support bar, grid form mass flow body with the frame forms and is connected, with the middle part of grid forms the grid structure, the density of frame is less than the density of grid form mass flow body.

Description

Grid of lead-acid battery and lead-acid battery

Technical Field

The invention relates to the technical field of energy storage devices, in particular to a grid of a lead-acid battery and the lead-acid battery.

Background

The lead-acid battery has the advantages of high safety, cyclic utilization and the like. The plates of lead acid batteries are generally classified into tube-type plates and plate-type plates. The plate-type polar plate is widely applied to lead-acid batteries because of the thin thickness and the lower resistivity. The major disadvantage of plate-type plates is the low specific energy of the lead-acid battery.

Lead and lead alloy are the main materials of the pole plate in the common lead-acid battery. Lead belongs to heavy metal elements and has a density as high as 11.34g/cm³. The invention patent application with application number CN201210107216.9 discloses a technical scheme for using a copper mesh as a main material of a lead-acid battery grid current collector to avoid copper-coated lead-acid batteriesThe corrosion of sulfuric acid electrolyte in the lead-acid battery can be used as a grid for the lead-acid battery by coating a layer of lead on the surface of a copper mesh grid.

Lead has two main uses in lead-acid batteries, one is lead material which is formed by lead through a series of processes and finally through electrochemical reaction of positive and negative active substances, the main component of the positive active substance is lead dioxide, and the main component of the negative active substance is spongy lead; another class of lead and lead alloys are materials used as current collectors for grids, busbars, terminals, and the like. The main function of the lead is to collect charge and discharge charges of active materials, and the lead is used as a conductor to input or output the charges from the battery, so as to assist the lead-acid battery active materials to complete the charging and discharging processes, and the amount of the lead and the lead alloy does not substantially change the energy output capacity of the battery. Therefore, the specific energy of lead-acid batteries is generally increased by replacing metallic lead with a low-density material or changing the formula of lead paste to increase the utilization rate of active materials.

The invention patent application of application number CN201510208608.8 discloses a method for improving the specific energy of a lead-acid battery by using a composite current collector as a base material to replace a traditional lead plate grid, and in order to avoid the corrosion of the current collector in an acid environment, a conductive adhesive transition layer and a conductive anticorrosive layer are required to be coated on the surface of the base material; the invention patent application with application number CN201610017413.X discloses a lead-acid storage battery with high specific energy and easy formation, and apparent density of positive lead paste is 4.0-4.15g/cm³The density of the negative pole lead paste is reduced to 4.1-4.15g/cm³The apparent density of the positive and negative electrode lead pastes is 5-15% lower than that of the common lead-acid battery, and the porosity of the lead paste with low apparent density is higher, so that the utilization rate of active substances of the positive and negative electrodes is improved, and the specific energy of the battery is improved.

The invention patent application of application number CN201510630972.3 discloses a manufacturing method of a lead-acid battery with high specific energy, which improves the oxidation degree of lead powder by reducing the quality of a grid. The utilization rate of active substances is improved by adding conductive carbon fibers, graphene and the like into the lead paste. The specific energy of the lead-acid battery is improved by reducing the mass of the inactive substances.

The invention patent application with application number CN201510940669.3 discloses a structure in which a horizontal first rib and a vertical first rib are vertical, and the vertical first rib is extended into a tab; the invention patent application of application number CN200680017715.1 discloses a grid structure in which a vertical first rib and a horizontal first rib of a battery are not perpendicular, and the vertical first rib is deviated to a tab position; the invention patent application of application number CN201310289855.6 discloses a grid with an expanded mesh structure, wherein the grid with the expanded mesh structure does not distinguish a transverse first rib and a vertical first rib, the first ribs which are crossed in a longitudinal and transverse mode respectively form certain angles with the current direction in a tab, and the grid with the expanded mesh structure does not have a vertical frame.

Existing grids typically include first criss-cross ribs, e.g., a horizontal first rib and a vertical first rib, formed from the same metal material. The potential of the same transverse first rib of the lead-acid battery is close in the charging and discharging process, the current density passing through the transverse first rib is much smaller than that of the vertical first rib, the transverse first rib has the function of keeping the structural stability of the grid, the transverse first rib and the vertical first rib are interwoven into a mesh grid, and positive and negative lead pastes are respectively filled in the grid to form a positive plate and a negative plate of the lead-acid battery. The grid has large mass and small energy storage mass ratio, and is not beneficial to the light weight of electronic products.

Therefore, a new technical solution is needed to solve the above technical problems.

Disclosure of Invention

One object of the present invention is to provide a new technical solution for a grid of a lead-acid battery.

According to one aspect of the invention, a grid for a lead acid battery is provided. The grid includes: the grid-shaped current collector comprises a plurality of first ribs extending along a preset direction and a tab, and the tab is connected with the first ribs; and the frame, the frame is including a plurality of support bars and the frame that link together, first rib with the support bar is alternately, many first ribs with the one end respectively with the frame base straining, first rib local embedding at least in the support bar, grid form mass flow body with the frame forms and is connected, with the middle part of grid forms the grid structure, the density of frame is less than the density of grid form mass flow body.

Optionally, a plurality of the first ribs extend at the same end and are connected together to form a collective portion, the end of the collective portion forms the tab, and the part of the collective portion other than the tab forms the second rib.

Optionally, the lengths of the first ribs are equal, and the collecting part protrudes outwards from the frame along the extending direction of the first ribs; or

The tab protrudes outwards from the frame along the extending direction of the first ribs, and the second ribs are located in the area surrounded by the frame.

Optionally, a plurality of the first ribs extend out of the frame at the same end, and the part extending out of the frame forms the tab.

Optionally, the plurality of first ribs are divided into a first portion and a second portion along an extending direction, and a conduction portion is located between the first portion and the second portion, a first electrode active material is attached to the first portion, a second electrode active material is attached to the second portion, the conduction portion forms the tab, and the first portion and the second portion share the tab.

Optionally, the first ribs and the support bars are both multiple, each of the first ribs is connected with all of the support bars, and each of the support bars is connected with all of the first ribs.

Optionally, the frame includes a first frame and a second frame disposed opposite to each other, the grid-shaped current collector is located between the first frame and the second frame, and the grid-shaped current collector is embedded in the first frame and the second frame.

Optionally, the first frame and the second frame are both made of plastic and are connected together by ultrasonic welding, and energy-guiding ribs are formed on the first frame or the second frame at positions corresponding to gaps between the plurality of first ribs.

Optionally, the frame is integrally formed, the supporting bar is provided with a plurality of open slots in the extending direction of the supporting bar, the opening direction of one part of the plurality of open slots is opposite to that of the other part of the plurality of open slots, and the plurality of first ribs are respectively clamped into the plurality of open slots.

Optionally, a groove is formed at a position where the frame is connected with the electrode active material.

Optionally, a cap head protruding from the first ribs or a bottom rib used for connecting two adjacent first ribs is arranged at one end of each of the first ribs opposite to the tab, and the cap head or the bottom rib is embedded into the bottom edge of the frame.

Optionally, the frame is made of plastic, rubber, resin, fiber, ceramic or glass.

Optionally, the grid-shaped current collector is made of lead or lead alloy, or a copper wire or an aluminum wire wrapped in lead.

Optionally, the grid-shaped current collector is formed by bending a metal wire, integrally punching or casting.

In accordance with another aspect of the present disclosure, a lead-acid battery is provided. The battery includes: the method comprises the following steps: the battery comprises a battery jar, wherein a cavity is formed in the battery jar, one or more battery monomers are arranged in the cavity, each battery monomer comprises a positive plate, a negative plate and a partition plate positioned between the positive plate and the negative plate, the positive plate and the negative plate comprise the grid provided by the invention, the lugs of the positive plates are electrically connected, and the lugs of the negative plates are electrically connected.

Optionally, the battery further comprises a busbar, the busbar is provided with a plurality of sets of first clamping plates and second clamping plates which are oppositely arranged, the tab is clamped between the first clamping plates and the second clamping plates, and the positive electrode plates and the negative electrode plates are electrically connected through the respective busbars.

Optionally, the cavity forms a plurality of isolation chambers arranged side by side, and a battery cell is arranged in each isolation chamber; a plurality of the battery cells are connected in series, and two adjacent battery cells are connected in series through the common bus bar.

Optionally, the bus bar further comprises a battery cover, wherein a sealing rubber groove is formed in the battery cover, and the bus bar is sealed in the battery cover by sealing rubber filled in the sealing rubber groove.

Optionally, the bus bar is made of copper and copper alloy or aluminum and aluminum alloy.

According to a third aspect of the present disclosure, a lead-acid battery is provided. The battery includes: the battery comprises a battery jar, a plurality of isolation chambers are arranged in the battery jar, battery monomers are arranged in the isolation chambers and comprise a positive plate, a negative plate and a partition plate positioned between the positive plate and the negative plate, the battery monomers of two adjacent isolation chambers share the grid provided by the invention, the first battery monomer with higher electric potential and the second battery monomer with lower electric potential are defined in the two adjacent battery monomers, and the first part of the grid is positioned in the isolation chamber where the first battery monomer is positioned and is used as the negative electrode of the first battery monomer; the second part of the grid is positioned in the isolation chamber where the second battery monomer is positioned and is used as the positive electrode of the second battery monomer, and the shared lug is positioned in the isolation wall between the two isolation chambers.

One technical effect of the invention is that the first ribs of the grid have the function of collecting current. The supporting bars are crossed and connected with the first ribs to form a grid structure. The support bars serve as structural supports. The lattice structure is used for attaching an electrode active material. For example, the electrode active material is a lead paste. In the manufacturing process, lead paste is coated or pressed on the grid structure. The density of the frame is less than that of the grid-shaped current collector, and the grid has the characteristic of light weight.

In addition, because a plurality of the first ribs are uniformly distributed in each supporting strip, the current density of the first ribs at the position near any supporting strip is uniformly distributed, even each first rib is provided with a connected tab, and the local overhigh temperature of the grid caused by the overlarge local current can be effectively prevented.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic structural view of a grid plate according to one embodiment of the present disclosure.

Fig. 2 is a partially enlarged view taken along line a-a in fig. 1.

Fig. 3 is a partially enlarged view taken along line B-B in fig. 1.

Fig. 4 is a schematic view of another angle of fig. 1.

Fig. 5-6 are schematic structural views of grid-like current collectors according to one embodiment of the present disclosure.

Fig. 7 is a schematic structural diagram of a frame according to one embodiment of the present disclosure.

Fig. 8 is a schematic structural diagram of a second frame according to an embodiment of the present disclosure.

FIG. 9 is a schematic structural view of a second louver according to one embodiment of the present disclosure.

Fig. 10 is a schematic structural view of a third gridlike current collector according to an embodiment of the present disclosure.

FIG. 11 is a schematic structural view of a third louver according to one embodiment of the present disclosure.

Fig. 12 is a schematic structural view of a fourth gridlike current collector according to one embodiment of the present disclosure.

Fig. 13 is a schematic structural view of a fifth gridlike current collector according to an embodiment of the present disclosure.

Fig. 14 is a schematic diagram of a first type of buss bar connection on a cell according to one embodiment of the present disclosure.

Fig. 15 is a schematic diagram of a structure in which a second type of bus bar connection is provided on a battery cell according to one embodiment of the present disclosure.

Fig. 16 is a schematic structural diagram of a lead-acid battery according to one embodiment of the present disclosure.

Fig. 17 is a schematic structural view of a busbar according to one embodiment of the present disclosure.

Fig. 18 is a schematic top view of a lead acid battery cell with a first type of buss bar connection therebetween according to one embodiment of the present disclosure.

Fig. 19 is a schematic cross-sectional view of each first tendon extending out of the frame to form a plurality of tab grids according to one embodiment of the present disclosure.

Fig. 20 is a schematic cross-sectional structure of a bipolar grid formed by a first rib being divided into a first portion and a second portion according to one embodiment of the disclosure.

Fig. 21 is a schematic view of a bipolar plate made from the bipolar grid of fig. 20.

Fig. 22 is a schematic structural diagram of a lead-acid battery according to one embodiment of the present disclosure.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to one embodiment of the present disclosure, a grid for a lead acid battery is provided. As shown in fig. 1, the grid comprises: a grid-like current collector and a frame. For example, the overall thickness of the grid is 0.5mm to 12 mm. Wherein the thickness is a dimension perpendicular to the major surface of the grid.

The grid-shaped current collector is used for collecting current. The grid-shaped current collector includes second ribs 103a, a plurality of first ribs 101 extending in a predetermined direction, and tabs 102. For example, the extending direction of the plurality of first ribs 101 is parallel to the predetermined direction or substantially parallel to the predetermined direction. The cross-section of the first ribs 101 is circular, semicircular, elliptical, trapezoidal, triangular, rectangular, etc. For example, a plurality of the first ribs 101 extend at the same end and are connected together to form the collective portion 103. The tab 102 is formed at the end of the collecting part 103, and the second ribs 103a are formed at the parts of the collecting part 103 other than the tab 102.

The same ends of the first ribs 101 are respectively connected with different parts of the second ribs 103 a. For example, the second ribs 103a are parallel to the horizontal direction and the first ribs 101 are parallel to the vertical direction. The number of the second ribs 103a is one or two. One end of each of the first ribs 101 is connected to one of the second ribs 103a, or both ends of each of the first ribs 101 are connected to two of the second ribs 103 a. For example, the entirety of the grid-like current collector has a rectangular shape. The different parts are connected, that is, the first ribs 101 are arranged in sequence along the extending direction of the second ribs 103a, and the second ribs 103a do not meet at one point.

The tab 102 is connected to the second ribs 103 a. For example, as shown in fig. 12 and 13, the tab 102 is connected to the second ribs 103a, and is connected to the tab 102 via the second ribs 103 a. It is also possible that, as shown in fig. 5, 6 and 10, a plurality of wires are led out from the tab 102 to be connected with the plurality of first ribs 101, respectively. The plurality of lines collectively constitute the second ribs 103 a. For example, the tab 102 has a thickness of 0.2mm to 8 mm. This thickness range ensures sufficient structural strength of the tab.

Optionally, the grid-shaped current collector is made of lead or a lead alloy; or the lead is internally coated with copper wires or aluminum wires. The material has good conductivity and sulfuric acid corrosion resistance. In other examples, lead-coated other high strength filaments are included to increase strength.

The frame includes a plurality of support bars 201 connected together. For example, as shown in fig. 7-8, the frame may also include borders that enclose together. The rims include a top rim 202 at an upper portion, a bottom rim 204 at a lower portion, and two side rims 203 between the top rim 202 and the bottom rim 204. The frame is rectangular as a whole. Two ends of the supporting bar 201 are respectively connected with the two side frames 203. The support bar 201 is parallel to the top rim 202.

As shown in fig. 1 and 4, the first ribs 101 intersect with the supporting bars 201. At least part of the first rib 101 is embedded in the supporting strip 201. The grid-shaped current collector is connected with the frame to form a grid structure in the middle of the grid. The density of the frame is less than the density of the grid-shaped current collector.

In one example, the frame has a density less than or equal to 5g/cm³. This density is much less than that of lead and lead alloys, effectively degrading the quality of the grid. For example, the frame may be made of plastic, rubber, resin, fiber, ceramic, or glass. The material has the characteristic of acid corrosion resistance. For example, the frame is formed by injection molding.

For example, the frame has a thickness of 0.5mm to 12 mm. This thickness range makes the frame structurally strong.

In this example, the first ribs 101 of the grid have the function of collecting current. The supporting bars 201 are crossed and connected with the first ribs 101 to form a lattice structure. The support bar 201 serves as a structural support. The lattice structure is used for attaching an electrode active material. For example, the electrode active material is a lead paste. In the manufacturing process, lead paste is coated or pressed on the grid structure. The tab 102 is located at the same end of the plurality of first ribs 101 in the extending direction.

In addition, as the same ends of the first ribs 101 are respectively connected with different parts of the second ribs 103a, the current distribution at each part of the grid is uniform, and the local over-high temperature of the grid caused by the over-high local current can be effectively prevented.

The inventor of the invention finds that the conventional grids are all made of the same metal material, such as lead, lead alloy and the like, and have a criss-cross grid structure. However, since the tab 102 is located at one end of the grid, for example, one end of the longitudinal ribs, the longitudinal direction is vertical. In operation, the current in the longitudinal and transverse ribs is not uniform. The current of the longitudinal ribs is much larger than that of the transverse ribs, wherein the transverse direction is the horizontal direction. While the transverse ribs mainly serve as structural support. In the embodiment of the invention, the transverse ribs are replaced by the material with low density (such as the supporting bars 201), so that on one hand, a good current collecting effect on the grid can be still ensured, on the other hand, the overall quality of the grid can be effectively reduced, and the energy storage quality ratio of the lead-acid battery is improved.

In one example, as shown in fig. 5, the grid-like current collector comprises a circuitously wound metal wire. The part of the wire extending in the main direction is the first plurality of ribs 101. The main direction coincides with the extension direction of the first ribs 101. For example, the metal wire is a lead wire, a lead alloy wire, or the like. The grid-shaped current collector with a planar structure is formed by repeatedly winding one end of a metal wire. Preferably, the first ribs 101 are parallel to each other and are equally spaced. This makes the grid current more uniform.

The grid-shaped current collector is easy to process and manufacture due to the winding forming mode, the processing cost is low, the processing precision is high, and the grid-shaped current collector is suitable for large-scale production.

In addition, the processing mode does not need to separately provide the second ribs 103a, the tabs 102 and other components.

In one example, as shown in fig. 1,4, 5, 6. A plurality of said first ribs 101 extend at the same end and are brought together to form a collective portion 103. The tab 102 is formed at the end of the collecting portion 103. The second ribs 103a are formed in the parts of the collecting portion 103 other than the tabs 102. For example, as shown in fig. 6, the ends of the collecting portion 103 are extruded to form tabs 102 with a predetermined shape so as to be connected to the busbar.

In one example, as shown in fig. 1, the first ribs 101 are equal in length. For example, the first ribs 101 are parallel to the long sides of the rectangle. The collecting part 103 protrudes outward from the frame in the direction of extension of the first rib 101. For example, the collecting portion 103 protrudes from the top frame 202. In this example, the lengths of the first ribs 101 are equal, and the reaction areas of the plurality of electrode plates formed after the electrode active material is coated are equal, thereby ensuring the reliability of the electrode plates.

It is also possible that the tab 102 projects outwardly from the frame in the direction of extension of the first ribs 101, as shown in fig. 10-11. The portions of the frame other than the tabs 102 are located in the area surrounded by the frame. For example, the portion is located inside the top rim 202, and only the tab 102 protrudes from the top rim 202. This arrangement reduces the risk of the electrode active material becoming embedded in the grooves of the second ribs 103a during the coating process, and also reduces the risk of shorting between the second ribs 103a of adjacent plates.

In other examples, the grid-shaped current collector is formed by stamping (as shown in fig. 12) or casting (as shown in fig. 13). The second ribs 103a, the first ribs 101 and the tabs 102 are integrally formed and do not need to be separately connected. The forming mode can form an integrated grid-shaped current collector, and is suitable for large-scale production.

In one example, as shown in FIG. 4, the frame includes a first frame 209 and a second frame 210 that are oppositely disposed. The grid-like current collector is located between the first frame 209 and the second frame 210. The grid-like current collector is embedded within the first frame 209 and/or the second frame 210.

For example, the first frame 209 and the second frame 210 each include a bezel and a support bar 201 located within the bezel. The recess structure 205 is formed on the first frame 209 and/or the second frame 210. When the grid-shaped current collector is mounted, the second ribs 103a and the first ribs 101 of the grid-shaped current collector are clamped into the concave structures 205. The first frame 209 and the second frame 210 are fixedly coupled together in a front-to-front manner. In this example, the first frame 209 and the second frame 210 can effectively protect the grid-like current collector.

In one example, as shown in fig. 7, the first frame 209 and the second frame 210 are both plastic and are joined together by ultrasonic welding. Energy guiding ribs 206 are formed at positions corresponding to the gaps between the peripheral frame of the second frame 210 and the plurality of first ribs 101. The energy guiding ribs 206 are strip-shaped protrusions protruding outwards in the direction of the contact surface with the frame 209. The energy guiding ribs 206 are positioned on the frame and the supporting bars 201. The cross section of the energy guiding rib 206 is triangular, trapezoidal, etc. When ultrasonic welding is performed, energy is concentrated on the energy guiding rib 206, thereby rapidly melting the energy guiding rib 206. The energy guiding ribs 206 effectively improve the welding quality and the welding speed of the first frame 209 and the second frame 210.

In one example, as shown in fig. 8 to 9, the supporting bar 201 is provided with a plurality of open grooves in an extending direction of the supporting bar 201. One part of the open grooves is opposite to the opening direction of the other part. For example, the opening direction of the first opening groove 205a is toward one surface of the frame. The opening direction of the second opening groove 205b is toward the other surface of the frame. The first ribs 101 are respectively clamped into the opening grooves. That is, a part of the first ribs 101 are clipped into the first opening grooves 205a, and the other part of the first ribs 101 are clipped into the second opening grooves 205 b. This arrangement provides a high structural strength of the grid by clamping the frame between the first ribs 101.

For example, the open slots are circular. The diameter of the circle corresponds to the diameter of the first ribs 101. The size of the opening end of the open slot is 1.5 times to 1.8 times of the radius of the open slot. Since the size of the open end is smaller than the diameter of the first ribs 101, the first ribs 101 can be effectively prevented from being detached from the open grooves.

In one example, the opening directions of adjacent open grooves are opposite. In this example, the plurality of first ribs 101 are provided at intervals in the first opening groove 205a and the second opening groove 205b, which makes the clamping action of the plurality of first ribs 101 to the frame stronger.

In one example, the plurality of first ribs 101 are located on different planes. For example, the first ribs 101 located in the plurality of first open grooves 205a are on the same plane, and the first ribs 101 located in the second open grooves 205b are on another plane. This arrangement makes full use of the space perpendicular to the rectangular main surface. Compared with the mode that the plurality of first ribs 101 are all located on the same plane, the mode enables the electrode active material not to fall off easily and to be attached to the grid structure more firmly.

In one example, the thickness of the first ribs 101 is 20% to 80% of the thickness of the support band 201. Within this range, the structural strength of the stay 201 is high, and the structural strength of the formed grid is high.

In one example, a retaining groove is provided on the top rim 202. The second ribs 103a are clamped in the limiting grooves. The limiting groove can effectively limit the position of the second rib 103a and prevent the second rib 103a from moving along the main surface.

In one example, the thickness of the first ribs 101 is 25% to 100% of the thickness of the second ribs 103 a. In this example, the first ribs 101 serve as structural support, requiring greater structural strength. The thickness of the second ribs 103a is greater than that of the first ribs 101, so that the current density from the second ribs 103a to the tab 102 is ensured not to be reduced.

In one example, as shown in fig. 5 to 7 and 12 to 13, a cap 104a protruding from the first ribs 101 or a bottom rib 104b for connecting two adjacent first ribs 101 is disposed at an end of the plurality of first ribs 101 opposite to the second rib 103 a. The frame includes a bottom rim 204 connected to the plurality of support bars 201. A clamping groove 208 is arranged on the bottom frame 204. The cap head 104b or the bottom rib 104a is snapped into the snap groove 208.

In this example, the provision of the bottom rib 104b, the cap head 104a, and the engaging groove 208, in cooperation with the second rib 103a, effectively defines the position of the first rib 101, and prevents the grid-like current collector from moving relative to the frame.

For example, the cap head 104a is perpendicular to both sides of the first rib 101. The cap head 104a forms a T-shaped structure with the first ribs 101. For example, the cross-sectional area of the cap head 104a is 1.5 to 5 times the cross-sectional area of the first ribs 101. This makes the fixation of the cap head 104a to the card slot 208 more secure.

In one example, a groove is provided at a portion of the frame to which the electrode active material is connected. The grooves can increase the contact area of the frame, the first ribs 101 and the electrode active material, so that the connection between the frame and the electrode active material is firmer. For example, as shown in fig. 2 to 3, the grooves are first grooves 207a formed in the direction of the inner side of the through hole surrounded by the frame, the support bars 201 and the first ribs 101, or a plurality of second grooves 207b designed at intervals are intermittently formed on the surfaces of the frame and the support bars 201 contacting the electrode active material. The second groove 207b is perpendicular to the extending direction of the supporting bar or the side frame strip. The cross section of the groove is triangular, rectangular, trapezoidal, semicircular and the like, and can be selected by a person skilled in the art according to actual needs.

In one example, as shown in fig. 20-20, a grid is divided into two regions. In this example, the plurality of first ribs 101 is divided into a first portion S1 and a second portion S2 in the extending direction and a conduction part between the first portion S1 and the second portion S2. The extending direction is the direction in which the first ribs 101 extend axially.

A first electrode active material is attached to the first portion S1, and a second electrode active material is attached to the second portion S2. That is, by disposing different electrode active materials at different portions, different regions form different electrodes. For example, the first electrode active material is a positive electrode active material 301; the second electrode active material is a negative electrode active material 302. The conductive part is not adhered with the electrode active material.

The conduction part forms the tab 102, and the first portion S1 and the second portion S2 share the tab 102. The electrode of the first portion S1 and the electrode of the second portion S2 are connected through a common tab 102. The integral structure is equivalent to two tabs 102 of the grid shown in fig. 19 being connected together to form a common tab.

Fig. 21 discloses a bipolar plate structure formed after the grid shown in fig. 20 is coated with a positive active material 301 and a negative active material 302.

When assembled into a lead acid battery, the first portion S1 and the second portion S2 each act as electrodes for different battery cells. For example, the second portion S2 and the negative electrode active material 302 serve as a negative electrode of one cell, and the first portion S1 and the positive electrode active material 301 serve as a positive electrode of another cell adjacent to the above-mentioned cell. With this arrangement, two battery cells are connected in series. Due to the existence of the common tab 102, no additional conduction element is needed to be arranged between the two battery cells for conduction.

In addition, the common tab 102 is arranged in a manner that different battery cells are connected more firmly, and the overall strength of the lead-acid battery is higher.

It should be noted that one or more battery cells may be disposed in each of the isolated chambers. A plurality of battery cells arranged side by side may be connected in series in a negative-positive order by the bipolar plate.

In one example, the first ribs 101 and the supporting bars 201 are multiple, each of the first ribs 101 is connected with all of the supporting bars 201, and each of the supporting bars 201 is connected with all of the first ribs 101. This arrangement provides a stronger grid structure by allowing each first rib 101 to engage each brace 201.

According to another embodiment of the present disclosure, a lead-acid battery is provided. As shown in fig. 14-16, the lead-acid battery includes: the battery jar A1 has a cavity formed in the battery jar A1. One or more battery cells are disposed within the cavity. The battery cell includes a positive electrode plate B01, a negative electrode plate B02, and a separator B03 between the positive electrode plate B01 and the negative electrode plate B02. The separator B03 can prevent a short circuit from occurring between the adjacent positive electrode plate B02 and negative electrode plate B01. The positive plate B01 and the negative plate B02 comprise the grid provided by the invention. The positive electrode plates B01 are electrically connected to each other via a tab, and the negative electrode plates B02 are electrically connected to each other via a tab.

As shown in fig. 14 to 16, the tabs of the plurality of electrically connected positive plates B02 form a positive electrode bus bar of the battery cells. The tab of the plurality of electrically connected negative electrode plates B01 forms a negative electrode bus bar of the battery cell. The lead-acid battery has the characteristics of light weight and high energy storage mass ratio.

In one example, as shown in fig. 17, the lead acid battery cell further includes a bus bar. The busbar has a plurality of sets of oppositely disposed first and second clamping plates 401, 402. For example, the bus bar includes a connection plate and a plurality of sets of first and second clamp plates 401 and 401 juxtaposed on one surface of the connection plate. The tab 102 is held between the first and second plates 401 and 402, and the positive electrode plates B01 and the negative electrode plates B02 are electrically connected to each other by the bus bars. The bus bar connects the tabs of the positive electrode plates B01 of the plurality of battery cells in parallel, and connects the tabs of the negative electrode plates B02 in parallel. The two clamping plates 401,402 can effectively clamp the pole lug and protect the pole lug.

Alternatively, the material of the reflow bar may be, but is not limited to, a metal material such as copper, aluminum, and the like.

In one example, as shown in fig. 18, the cavities form a plurality of isolated chambers, e.g., six, arranged side-by-side. A battery cell is disposed within each isolation chamber. The battery cell includes the plurality of battery cells. A plurality of the battery cells are connected in series. Two adjacent battery cells are connected in series through a common bus bar A3. For example, bus a3 spans the third and fourth isolation chambers. Busbar a31 spans the fourth and fifth isolation chambers. In this example, the negative electrode of the third cell C3 shares a bus bar A3 with the positive electrode C4 of the fourth cell. The negative electrode of the fourth cell C4 shares a bus bar a31 with the positive electrode C5 of the fifth cell. This arrangement facilitates the series connection between the plurality of battery cells.

In one example, as shown in fig. 16, a positive post a6 and a negative post a5 are provided outside the battery container a1, the positive post a6 is electrically connected to a bus bar of the lead-acid battery as a positive electrode through a metal sheet, and the negative post a5 is electrically connected to a bus bar of the lead-acid battery as a negative electrode through a metal sheet.

In this example, the positive and negative electrodes of the combined lead-acid battery are connected to a positive post a6 and a negative post a5 provided outside the battery container a 1. In this way, the charge in the battery can be led to the outside of the battery container a1 for connection of the lead wire in use.

For example, as shown in fig. 15, when the frame material of the grid is a high temperature resistant material such as glass or ceramic, the tab 102, the post B05 and the bus bar may be welded together by a common welding technique, for example, by cavity welding or casting. The arrangement mode can continue to use the original lead-acid battery production equipment and process.

In one example, the lead acid battery further includes a battery cover. And a sealing rubber groove is arranged on the battery cover. And the sealant is filled in the sealant groove so as to seal the busbar in the battery cover.

In this example, the bus bar is sealed by sealing gel sealing the straight opening of the battery jar a 1. The bus bar can be prevented from being corroded by sulfuric acid in the lead-acid battery, and the sealant plays a role in adhering the battery jar and the battery cover and protecting the bus bar and other elements.

According to a third embodiment of the present invention, a lead-acid battery is provided. As shown in fig. 22, the lead-acid battery includes a battery can. A plurality of isolated chambers, for example, 6, are provided within the battery well. A plurality of cells, for example 4, are provided within the isolated chamber. The single battery comprises a positive plate B011, a negative plate B012 and a separator B013 between the positive plate B011 and the negative plate B012. The battery cells of two adjacent isolated chambers share a grid as shown in fig. 20. The first battery cell F1 is defined as the higher potential of the two adjacent battery cells. For example, the first cell F1 is located in the top isolation chamber. The lower one of the potentials is the second cell F2. For example, the second cell F2 is adjacent to the top isolation chamber. The positive electrode D1 of the lead acid battery extends outwardly from the side wall of the first isolation chamber. The negative electrode D2 extends outwardly from the side wall of the lower end isolation chamber.

The first part of the grid is positioned in the isolation chamber where the first battery unit F1 is positioned and serves as the negative electrode of the first battery unit F1. The second part is positioned in the isolation chamber where the second battery unit F2 is positioned and serves as the positive electrode of the second battery unit F2. The common tab is located in a separation wall B014 between the two separation chambers. The partition wall B014 forms a seal with the common tab 102. The common tab 102 may be sealed to the partition wall B014 by a person skilled in the art using a sealing means commonly used in the art.

The first battery cell and the second battery cell are not limited to two as shown in the drawing, and may be any adjacent two battery cells.

In this example, the grid is capable of connecting two cells together in series, which makes the lead-acid battery simpler in construction.

Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A grid for a lead-acid battery, comprising: the method comprises the following steps:

the grid-shaped current collector comprises a plurality of first ribs extending along a preset direction and a tab, and the tab is connected with the first ribs; and

the frame, the frame is including a plurality of support bars and the frame that link together, first rib with the support bar is alternately, many first ribs with the one end respectively with the fastening of frame base, at least local embedding of first rib in the support bar, the grid form mass flow body with the frame forms and is connected, with the middle part of grid forms the grid structure, the density of frame is less than the density of the grid form mass flow body.

2. The grid of claim 1, wherein: the first ribs extend from the same end and are connected together to form an aggregation part, the tail end of the aggregation part forms the tab, and the parts of the aggregation part except the tab form the second ribs.

3. The grid of claim 1, wherein: the lengths of the first ribs are equal, and the collection part protrudes out of the frame along the extending direction of the first ribs; or

4. The grid of claim 1, wherein: the first ribs extend out of the frame from the same end, and the parts extending out of the frame form the tabs.

5. The grid of claim 1, wherein: the plurality of first ribs are divided into a first part, a second part and a conduction part located between the first part and the second part along the extension direction, a first electrode active material is attached to the first part, a second electrode active material is attached to the second part, the conduction part forms the tab, and the first part and the second part share the tab.

6. The grid of claim 1, wherein: first rib with the support bar is a plurality ofly, every first rib with all the support bar forms to be connected, every the support bar with all first rib forms to be connected.

7. The grid of claim 1, wherein: the frame includes relative first frame and the second frame that sets up, the grid-shaped mass flow body is located between first frame and the second frame, the grid-shaped mass flow body imbeds first frame with in the second frame.

8. The grid of claim 7, wherein: the first frame and the second frame are made of plastic and are connected together through ultrasonic welding, and energy guide ribs are formed at positions of the first frame or the second frame corresponding to gaps among the plurality of first ribs.

9. The grid of claim 1, wherein: the frame integrated into one piece, the support bar is in be provided with a plurality of open slots on the extending direction of support bar, it is a plurality of opening direction of some in the open slot is opposite with the opening direction of other parts, and is a plurality of first rib card is a plurality of respectively in the open slot.

10. The grid of claim 1, wherein: and a groove is arranged at the position where the frame is connected with the electrode active material.

11. The grid of claim 1, wherein: the end, opposite to the electrode lug, of each first rib is provided with a cap head protruding out of the first rib or a bottom rib used for connecting two adjacent first ribs, and the cap head or the bottom rib is embedded into the bottom edge of the frame.

12. The grid of any one of claims 1-11, wherein: the frame is made of plastic, rubber, resin, fiber, ceramic or glass.

13. The grid of any one of claims 1-11, wherein: the grid-shaped current collector is made of lead or lead alloy, or copper wires or aluminum wires coated in lead.

14. The grid of any one of claims 1-11, wherein: the grid-shaped current collector is formed by bending metal wires, integrally punching or casting.

15. A lead-acid battery characterized by: the method comprises the following steps: a battery container, wherein a cavity is formed in the battery container, one or more battery cells are arranged in the cavity, the battery cells comprise a positive plate, a negative plate and a separator positioned between the positive plate and the negative plate, the positive plate and the negative plate comprise a grid according to any one of claims 1-4 and 6-14, the lugs of the positive plates are electrically connected, and the lugs of the negative plates are electrically connected.

16. The lead-acid battery of claim 15, wherein: still include the busbar, the busbar has relative first splint and the second splint that set up of multiunit, utmost point ear is held first splint with between the second splint, and is a plurality of positive plate, a plurality of the negative plate is respectively through respective the busbar forms the electricity and connects.

17. The lead-acid battery of claim 15, wherein: the cavity forms a plurality of isolation chambers arranged side by side, and a battery monomer is arranged in each isolation chamber; a plurality of the battery cells are connected in series, and two adjacent battery cells are connected in series through the common bus bar.

18. The lead-acid battery of claim 15, wherein: the bus bar is characterized by further comprising a battery cover, wherein a sealing rubber groove is formed in the battery cover, and sealing rubber is filled in the sealing rubber groove to seal the bus bar in the battery cover.

19. The lead-acid battery of claim 15, wherein: the bus bar is made of copper and copper alloy or aluminum and aluminum alloy.

20. A lead-acid battery characterized by: the method comprises the following steps: the battery container is internally provided with a plurality of isolation chambers, battery cells are arranged in the isolation chambers, the battery cells comprise a positive plate, a negative plate and a partition plate positioned between the positive plate and the negative plate, the battery cells of two adjacent isolation chambers share the grid of claim 5, the first battery cell with the higher potential and the second battery cell with the lower potential are defined, and the first part of the grid is positioned in the isolation chamber where the first battery cell is positioned and serves as the negative electrode of the first battery cell; the second part of the grid is positioned in the isolation chamber where the second battery monomer is positioned and is used as the positive electrode of the second battery monomer, and the shared lug is positioned in the isolation wall between the two isolation chambers.