Composite energy storage lead storage battery

Abstract

The utility model relates to a composite energy storage lead storage battery, belongs to the technical field of energy storage batteries, and solves the problem of unbalanced output and input current distribution in battery convergence in the prior art. The lithium ion battery comprises a battery core and a battery shell, the battery core comprises a busbar and a polar plate; the busbar comprises a positive busbar and a negative busbar; each of the positive busbar and the negative busbar comprises a busbar grid; the confluence grid comprises a confluence area and a plurality of longitudinal grid ribs arranged in parallel; the lengths of the longitudinal grid ribs are gradually increased from the center of the confluence area to two sides; and a plurality of polar plates are arranged, each polar plate is provided with a plurality of conductive ribs, the conductive ribs are connected with the longitudinal grid ribs, and a plurality of collection nodes are formed at the joints. According to the utility model, output and input current distribution balance during convergence can be realized, and power transmission efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage battery technical field especially relates to a composite energy storage lead storage battery. BACKGROUND

[0002] The current of the energy storage battery in the prior art is usually set to a single tab for current collection, although the current transmission efficiency is relatively high, but the output and input current distribution is uneven. When the current passes through the tab, heat will be generated due to resistance, and uneven current distribution can easily cause the tab to deform due to excessive current heat, reducing the charge and discharge efficiency of the battery, and can also affect the performance and life of the battery. In the case of high-rate charge and discharge or long-time continuous work, the risk of local overheating of the tab is greater. SUMMARY

[0003] In view of the above analysis, the utility model embodiment aims to provide a composite energy storage lead storage battery to solve the problem of uneven distribution of output and input current in battery current collection.

[0004] The utility model mainly aims to realize the following technical scheme:

[0005] The battery core comprises a busbar and a plate; the busbar comprises a positive busbar and a negative busbar; the positive busbar and the negative busbar each comprise a busbar grid;

[0006] The busbar grid comprises a busbar area and a plurality of longitudinally arranged longitudinal grid ribs; the length of the longitudinal grid rib gradually increases from the center of the busbar area to both sides;

[0007] The plate is provided with a plurality of plates, each of which has a plurality of conductive ribs, the conductive ribs are connected to the longitudinal grid ribs, and a plurality of collection nodes are formed at the connection.

[0008] Further, the busbar grid further comprises a transverse grid rib, the length direction of the transverse grid rib is perpendicular to the longitudinal grid rib, and each longitudinal grid rib is sequentially connected.

[0009] Further, the positive busbar and the negative busbar further comprise an end pole; the end pole is arranged at the upper part of the busbar grid; the end pole comprises a cylindrical joint and a trapezoidal connecting block; the cylindrical joint is nested with a conductive copper core inside.

[0010] Further, one end of the trapezoidal connecting block is embedded in the bottom of the cylindrical structure, and the other end is connected to the busbar grid; the trapezoidal connecting block is used to bridge the current of the busbar grid to the conductive copper core of the end pole.

[0011] Further, the battery shell comprises an upper cover; the upper cover is provided with an acid discharge hole at the corner; the acid discharge hole is used to discharge the residual acid in the battery bottom shell after the battery is formed.

[0012] Further, the middle of the upper cover is further provided with a deflation valve hole for heat dissipation of the battery.

[0013] Further, the middle of the upper cover is further provided with a positive pole hole and a negative pole hole for mounting the terminal pole.

[0014] Further, the pole plate comprises a positive pole plate and a negative pole plate; the end of the positive pole plate is connected with the positive bus bar, and the end of the negative pole plate is connected with the negative bus bar.

[0015] Further, the positive pole plate is externally provided with plastic packaging.

[0016] Further, a partition plate is further included, which is arranged outside the battery core and between the positive pole plate and the negative pole plate, and is used for U-shaped packaging of the positive pole plate and the negative pole plate after grouping.

[0017] Compared with the prior art, the utility model can realize at least one of the following beneficial effects:

[0018] (1) Compared with the uneven distribution of output and input current caused by a single tab in the prior art, the utility model adopts a bus bar to converge current in each region, each longitudinal grid is connected with each conductive rib, and a plurality of convergence nodes are formed at the connection position of the conductive rib and the longitudinal grid, so that the current is uniformly distributed and the charging and discharging capacity is strong. The longitudinal grid has different lengths according to different distances from the center, the transmission path of the current of the longitudinal grid in the convergence area is optimized, the loss is reduced, and the service life of the battery is improved; each longitudinal grid is connected with each conductive rib in the pole plate, so that the conduction resistance of the current is smaller, and the high-power use environment is beneficial.

[0019] (2) The utility model discloses that the middle part of the bus grid is provided with a transverse grid, the length direction of the transverse grid is perpendicular to the longitudinal grid, and the transverse grid is sequentially connected with each longitudinal grid, so that the current effect is balanced, and the deformation probability of the bus grid is reduced.

[0020] (3) The acid discharge hole in the utility model corresponds to the corner of the bottom shell and the gap between the battery core, and is used for discharging residual acid in the battery bottom shell after the battery is formed. When discharging acid, the downpipe is used to directly send the cold acid to the bottom of the battery, the deflation valve timely takes away the heat generated during the formation of the battery, effectively controls the acid content in the battery within the design range, and improves the consistency of the battery.

[0021] (4) In order to avoid that the conductive rib exposed outside the active material of the positive terminal is corroded by acid, the utility model is externally provided with plastic packaging on the positive pole plate, so that the conductive rib is isolated from the reaction acid, and the conductive rib no longer participates in the oxidation-reduction reaction, so that the corrosion and fracture of the conductive rib during the circulation are avoided.

[0022] The above technical solutions can be combined with each other to realize more preferred combination solutions. Other features and advantages of the present application will be described in the following content, and some advantages can be apparent from the description or can be understood by implementing the present application. The purposes and other advantages of the present application can be realized and obtained through the content specifically indicated in the text and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings are only for the purpose of illustrating specific embodiments and are not considered as limiting the present application, and the same reference signs represent the same components throughout the drawings.

[0024] Figure 1 Structure diagram of a battery of a specific embodiment;

[0025] Figure 2 Structure diagram of a battery core of a specific embodiment;

[0026] Figure 3 Structure diagram of a busbar assembly of a specific embodiment;

[0027] Figure 4 Structure diagram of a plate of a specific embodiment;

[0028] Figure 5 Structure diagram of a battery shell of a specific embodiment.

[0029] Reference signs:

[0030] 1-battery core, 11-busbar, 111-end pole, 1111-conductive copper core, 112-busbar grid, 1121-longitudinal grid rib, 1122-transverse grid rib, 12-plate, 121-composite grid, 1211-frame, 1212-conductive rib, 122-active material, 13-separator, 2-battery shell, 21-upper cover, 211-positive pole hole, 212-negative pole hole, 213-vent valve hole, 214-acid discharge hole, 22-bottom shell. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present application will be described in detail below with reference to the drawings, wherein the drawings constitute a part of the present application and are used to explain the principles of the present application together with the embodiments of the present application, and are not used to limit the scope of the present application.

[0032] As shown in a specific embodiment of the present application, Figure 1 a composite energy storage lead-acid battery is disclosed, which comprises a battery core 1 and a battery shell 2 for accommodating the battery core 1.

[0033] As shown in a specific embodiment of the present application, Figure 2As shown, the battery cell 1 includes a busbar 11 , a plate 12 and a separator 13 .

[0034] like Figure 3 As shown, the busbar 11 includes a positive busbar and a negative busbar, and the positive busbar and the negative busbar are arranged opposite to each other on both sides of the battery core 1.

[0035] The positive electrode busbar and the negative electrode busbar include terminal posts 111 and busbar grids 112 .

[0036] The terminal post 111 is located above the busbar 112 and consists of a cylindrical connector and a trapezoidal connecting block. The cylindrical connector houses the conductive copper core 1111 and has threads on the outside for screwing into the positive or negative electrode holes 211 or 212 of the battery casing. One end of the trapezoidal connecting block is embedded in the bottom of the cylindrical connector and the other end is connected to the busbar 112, bridging the current within the busbar 112 to the conductive copper core 1111.

[0037] The busbar grid 112 is used to collect the current in the electrode plate 12 and transmit it to the terminal pole 111. The upper part of the busbar grid 112 is a busbar area.

[0038] The busbar 112 includes a plurality of longitudinal ribs 1121 arranged in parallel longitudinally. The length of the longitudinal ribs 1121 gradually increases from the center of the busbar area toward the sides. In this embodiment, the longitudinal ribs 1121 have different lengths at different distances from the center, with the longitudinal ribs 1121 at the center being the shortest and the longitudinal ribs 1121 at the sides being the longest, thereby optimizing the current transmission path of the longitudinal ribs 1121 in the busbar area.

[0039] Furthermore, to balance the current effect and reduce the probability of deformation of the busbar 112, transverse ribs 1122 are provided in the middle of the busbar 112. The length of the transverse ribs 1122 is perpendicular to the longitudinal ribs 1121 and sequentially connects the longitudinal ribs 1121. The provision of transverse ribs 1122 can reduce losses caused by uneven current after converging, help to alleviate the problem of uneven charging and discharging in different areas, and reduce heat during the battery formation process.

[0040] Compared with the prior art, this embodiment uses a busbar 11 to converge the currents of each area, and multiple longitudinal ribs 1121 have different lengths according to different distances from the center, which optimizes the current transmission path of the longitudinal ribs 1121 in the convergence area, reduces losses, and improves the service life of the battery.

[0041] Multiple electrode plates 12 and separators 13 are positioned between the positive and negative busbars. The electrode plates 12 include positive and negative plates. The ends of the positive plates are connected to the positive busbars, while the ends of the negative plates are connected to the negative busbars. The electrode plates 12 are arranged side by side in the battery cell 1, with adjacent electrode plates 12 having different polarities.

[0042] As shown in Figure 4 The plate 12 includes a composite grid 121 and a lead active material 122. The lead active material 122 is plate-shaped and is solidified and formed on two end faces of the composite grid 121.

[0043] The composite grid 121 is used to support the lead active material 122. The composite grid 121 is a grid-shaped plate and includes an outer frame 1211 and a conductive rib 1212. The outer frame 1211 is a rectangular frame 1211 and has a plurality of horizontal ribs arranged inside. The horizontal ribs are perpendicular to the conductive rib 1212 and have the function of stabilizing the lead wire.

[0044] The conductive rib 1212 is a composite lead wire and has a length direction perpendicular to the horizontal rib. One end of the conductive rib 1212 is fixed to one short side of the outer frame, and the other end is a free end and extends out of the frame 1211 through the other short side of the outer frame. The conductive rib 1212 is the current collector of the plate 12 and has the function of conducting current after the battery is activated. The horizontal rib and the conductive rib 1212 are densely distributed in the active material, which can greatly balance the current and is beneficial to the current distribution during charging and discharging.

[0045] Each plate 12 has a plurality of conductive ribs 1212 in linear communication with the busbar grid 112. Each longitudinal grid rib 1121 is separately connected to each conductive rib 1212 in the plate 12, can separately collect the current of each region, and makes the conduction resistance of the current smaller, which is more beneficial to the high-power use environment. Each conductive rib 1212 is a busbar node at the connection of the longitudinal grid rib 1121, the busbar grid 112 has a plurality of busbar nodes, improves the uniformity of current distribution, and further enhances the charging and discharging capacity of the battery.

[0046] Compared with the prior art, in the embodiment, each longitudinal grid rib 1121 is connected to each conductive rib 1212 in the plate 12, each conductive rib 1212 is a busbar node at the connection of the longitudinal grid rib 1121, the busbar grid 112 has a plurality of busbar nodes, improves the uniformity of current distribution, and further enhances the charging and discharging capacity of the battery, and solves the problem of uneven distribution of output and input current caused by the setting of a single tab in the prior art.

[0047] The corrosion of the composite grid 121 will weaken the binding force between the active material and the composite grid 121, causing some active material to fall off, thereby reducing the total amount of substances participating in the electrochemical reaction, and reducing the capacity of the battery. In this embodiment, the base material of the composite grid 121 is an injection molded high polymer composite material, and the outer part is chemically plated and coated with a lead layer. Since the high polymer injection molded grid base does not participate in the chemical and electrochemical reactions during the entire service life of the battery, the expansion, corrosion and fracture of the composite grid 121 during the cycle life are avoided, so that the composite grid 121 can provide support and restraint for the active material during the entire cycle use process.

[0048] Further, in order to avoid the acid corrosion of the positive electrode end exposed to the outside of the active material, the positive plate is provided with a plastic coating, which isolates the conductive rib 1212 from the reaction acid, so that it no longer participates in the oxidation-reduction reaction, avoiding the corrosion and fracture of individual conductive ribs 1212 during the cycle use.

[0049] The separator 13 is a U-shaped AGM separator 13, which is arranged between the positive plate and the negative plate and outside the battery core 1, and is used for U-shaped coating after the positive and negative plates are matched.

[0050] As shown in Figure 5 The battery shell 2 includes an upper cover 21 and a bottom shell 22. The upper cover 21 is provided with a positive hole 211, a negative hole 212, a gas release valve hole 213 located between the positive hole 211 and the negative hole 212, and an acid discharge hole 214 arranged at the corner of the positive end.

[0051] The gas release valve hole 213 is used for heat dissipation of the battery. The acid discharge hole 214 corresponds to the corner of the bottom shell 22 and the gap between the battery core 1, which is used to discharge the residual acid in the battery bottom shell 22 after the battery is formed. When discharging acid, a downpipe is used to directly send cold acid to the bottom of the battery, and the gas release valve timely takes away the heat generated during the formation of the battery, effectively controls the range of acid content in the battery, and improves the consistency of the battery.

[0052] The upper cover 21 is also provided with two grooves for people to carry.

[0053] The installation method of this embodiment is as follows:

[0054] Assemble the battery core 1: the battery has two sides with opposite polarities, a plurality of positive plates 12 and negative plates 12 are arranged in a stack. The adjacent electrodes with the same polarity are arranged on the same side and connected by the plates 12. The separator 13 is arranged between the positive plate 12 and the negative plate 12; the end of the positive plate 12 is connected with the positive bus bar 11, and the end of the negative plate 12 is connected with the negative bus bar 11. It should be noted that the separator 13 is two-layer buckling; the separator 13 is placed outside the outermost positive plate 12 or negative plate 12; the bus bar 11 is installed on both sides perpendicular to the installation direction of the plate 12, and the distance between the bus bar 11 and the bottom is a certain thickness.

[0055] The assembled battery core 1 is placed into the battery bottom shell 22 according to the positive and negative electrode distribution, the positive electrode end pole 111 of the upper cover 21 is aligned with the positive electrode hole 211 of the upper cover 21, the negative electrode end pole 111 is aligned with the negative electrode hole 212 of the upper cover 21, and the upper cover 21 is installed.

[0056] The whole battery is assembled.

[0057] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A composite energy storage lead-acid battery, characterized in that: Comprising a battery core (1) and a battery casing (2); The battery core (1) comprises a busbar (11) and a plate (12); the busbar (11) comprises a positive busbar and a negative busbar; the positive busbar and the negative busbar both comprise a busbar grid (112); The busbar grid (112) comprises a busbar area and a plurality of parallel longitudinal ribs (1121); the length of the longitudinal ribs (1121) gradually increases from the center of the busbar area to both sides; A plurality of the electrode plates (12) are provided, each of the electrode plates (12) has a plurality of conductive ribs (1212), each of the conductive ribs (1212) is connected to each of the longitudinal grid ribs (1121), and a plurality of collection nodes are formed at the connection points.

2. The composite energy storage lead-acid battery according to claim 1, characterized in that: The busbar (112) further comprises transverse ribs (1122), the length direction of the transverse ribs (1122) being perpendicular to the longitudinal ribs (1121) and sequentially connecting the longitudinal ribs (1121).

3. The composite energy storage lead-acid battery according to claim 1, characterized in that: The positive busbar and the negative busbar further include an end pole (111); the end pole (111) is arranged on the upper part of the busbar grid (112); the end pole (111) includes a cylindrical joint and a trapezoidal connecting block; a conductive copper core (1111) is nested inside the cylindrical joint.

4. The composite energy storage lead-acid battery according to claim 3, characterized in that: One end of the trapezoidal connection block is embedded in the bottom of the cylindrical joint, and the other end is connected to the busbar (112); the trapezoidal connection block is used to bridge the current of the busbar (112) to the conductive copper core (1111).

5. The composite energy storage lead-acid battery according to claim 3, characterized in that: The battery housing (2) comprises an upper cover (21); acid discharge holes (214) are provided at the corners of the upper cover (21); the acid discharge holes (214) are used to discharge residual acid from the battery housing (2) after the battery is formed.

6. The composite energy storage lead-acid battery according to claim 5, characterized in that: The upper cover (21) is further provided with a gas relief valve hole (213), and the gas relief valve hole (213) is used for heat dissipation of the battery.

7. The composite energy storage lead-acid battery according to claim 5, characterized in that: The upper cover (21) is further provided with a positive electrode hole (211) and a negative electrode hole (212), and the positive electrode hole (211) and the negative electrode hole (212) are used for installing the terminal column (111).

8. The composite energy storage lead-acid battery according to claim 1, characterized in that: The electrode plate (12) comprises a positive electrode plate and a negative electrode plate; the end of the positive electrode plate is connected to the positive electrode bus bar, and the end of the negative electrode plate is connected to the negative electrode bus bar.

9. The composite energy storage lead-acid battery according to claim 8, characterized in that: The positive electrode plate is provided with plastic wrapping on the outside.

10. The composite energy storage lead-acid battery according to claim 9, characterized in that: It also includes a separator (13), which is arranged on the outside of the battery core (1) and between the positive electrode plate and the negative electrode plate. The separator (13) is used for U-shaped coating of the positive electrode plate and the negative electrode plate after they are assembled.

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