CN211150660U

CN211150660U - Bridging structure for connecting lead-acid storage battery single batteries

Info

Publication number: CN211150660U
Application number: CN201921994412.6U
Authority: CN
Inventors: 张波; 张建华
Original assignee: Jiangsu Leoch Battery Co Ltd
Current assignee: Jiangsu Leoch Battery Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-07-31
Anticipated expiration: 2029-11-18

Abstract

The utility model discloses a bridging structure for connecting lead acid battery cell, include: a base and two extensions formed as a unitary structure; the thickness of the base body is basically the same as that of the extension body; the base body spans between the two single batteries and is provided with two connecting positions; the two extending bodies are respectively connected to the two connecting positions, and the extending bodies are arranged along the arrangement direction of the lugs with the same polarity in the single battery and are connected with the lugs. The connection section does not exist between the base body and the two extending bodies, and after the extending bodies are connected with the lugs of the single batteries, the connection reliability can be improved, and the use requirement of high-rate discharge is met.

Description

Bridging structure for connecting lead-acid storage battery single batteries

Technical Field

The application relates to the technical field of storage batteries, in particular to a bridging structure for connecting single batteries of a lead-acid storage battery.

Background

The lead-acid storage battery is composed of a plurality of single batteries, and a positive bus bar and a negative bus bar between adjacent single batteries are connected through a lead bridging pole. The conventional bridged pole is usually split (as shown in fig. 1), and as shown in fig. 1, (a) in fig. 1 is a structure of a single bridged pole 1, and (b) is a case where two single bridged poles (1 and 1') are respectively assembled between two adjacent single batteries, and upper ends of the two bridged poles on the positive and negative busbars of the two adjacent single batteries are connected together by welding, so that the single batteries are sequentially connected in series to form the storage battery. The welding split type bridging pole has the defects that a welding point is not compact enough, the connection reliability is poor, the cross section area is small, the use requirement of a storage battery with relatively small discharge current multiplying power can only be met, and for a high-power battery with high-multiplying power discharge, the split type bridging pole is usually fused due to overlarge discharge current (20-30 times of the battery capacity, and even 40 times of instantaneous current), so that the battery is failed.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a bridging structure for connecting single batteries of a lead-acid storage battery so as to meet the use requirement of high-rate discharge.

The application provides a bridging structure for connecting lead acid battery cell, includes: a base and two extensions formed as a unitary structure; the thickness of the base body is basically the same as that of the extension body; the base body spans between the two single batteries and is provided with two connecting positions; the two extending bodies are respectively connected to the two connecting positions, and the extending bodies are arranged along the arrangement direction of the lugs with the same polarity in the single battery and are connected with the lugs.

Further, the bridging structure for connecting the lead-acid storage battery single batteries is characterized in that the width of the base body and the width of the extension body are gradually reduced from top to bottom along the thickness direction.

Further, the bridging structure for connecting lead-acid battery cells, wherein the extension has a proximal end connected to the connection site and a distal end remote from the connection site; the extension body has a thickness and a width that both increase in a distal to proximal direction.

Further, the bridging structure for connecting the lead-acid storage battery single batteries is characterized in that the base body and the extension body are integrally formed through cast welding.

Further, the bridging structure for connecting lead-acid storage battery single cells is characterized in that the two connecting positions are two ends of the substrate respectively, and the extensions on the two ends are both substantially perpendicular to the substrate or substantially parallel to the substrate.

Further, the bridging structure for connecting lead-acid storage battery single batteries is characterized in that the orthographic projection of the substrate and the extension body forms an H-shaped shape or an I-shaped shape.

The utility model has the advantages that:

the bridging structure for connecting lead acid battery cells provided by the present application comprises: a base and two extensions formed as a unitary structure; the thickness of the base body is basically the same as that of the extension body; the base body spans between the two single batteries and is provided with two connecting positions; the two extending bodies are respectively connected to the two connecting positions, and the extending bodies are arranged along the arrangement direction of the lugs with the same polarity in the single battery and are connected with the lugs. The connection section does not exist between the base body and the two extending bodies, and after the extending bodies are connected with the lugs of the single batteries, the connection reliability can be improved, and the use requirement of high-rate discharge is met.

Drawings

FIG. 1 is a schematic representation of a prior art bridging structure;

FIG. 2 is a schematic diagram of a structure in one example of a bridged structure provided herein;

FIG. 3 is a schematic structural view of another embodiment of a bridging structure provided herein;

fig. 4 is a schematic diagram of a bridging structure and the position relationship between two single batteries provided in the present application;

fig. 5 is a schematic diagram of the distribution of the bridged structure provided in the present application in a battery.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments.

Lead-acid batteries generally comprise: the casing, the lid, a plurality of battery cell etc. wherein, every battery cell all comprises a plurality of positive plates, a plurality of negative plates and a plurality of baffle, and a plurality of positive plates and a plurality of negative plates are placed in turn one by one, and the baffle is located between adjacent positive plate and the negative plate. The shell is of a shell structure with a hollow cavity, an upper opening is formed in the upper end of the shell, and the cover body is buckled at the upper opening. Be provided with a plurality of vertical partition walls of longitudinal distribution in the cavity intracavity of casing, and a plurality of horizontal partition walls of transverse distribution, a plurality of horizontal partition walls all pass a plurality of vertical partition walls, and, the both ends of a plurality of vertical partition walls and a plurality of horizontal partition walls all with the inner wall fixed connection of casing, separate the cavity intracavity of casing for a plurality of chambeies that hold, a plurality of quantity that hold the chamber is unanimous with a plurality of battery cell's quantity, battery cell holds in holding the chamber, and inject proper amount electrolyte in this holds the chamber, thereby form lead acid battery.

Referring to fig. 2 and 3, the present embodiment provides a bridging structure 100 for connecting lead-acid battery cells, including: the base body 10 and the two extending bodies are formed into a monolithic structure, and particularly, the monolithic structure is formed by integrally molding through cast welding. The thickness of the base body 10 is substantially the same as that of the two extending bodies, and both are formed into a flat plate-like structure. The base 10 spans between two unit cells, that is, between a transverse partition or a longitudinal partition between the two unit cells, and the base 10 has two connection sites to which two extensions are connected, respectively. In the following embodiments, for the sake of convenience of distinction, two connection sites are defined as a first connection site 11 and a second connection site 12, and two extensions are defined as a first extension 20 and a second extension 20'.

The first extension body 20 is connected to the first connection position 11 and arranged along the arrangement direction of the same-polarity tabs in one single cell, and the second extension body 20' is connected to the second connection position 12 and arranged along the arrangement direction of the same-polarity tabs in another single cell. The first single battery and the second single battery are two adjacent single batteries, and the polarity of the tab with the same polarity in the first single battery is opposite to the polarity of the tab with the same polarity in the second single battery, that is, the tabs of the two adjacent single batteries respectively connected with the first extension body 20 and the second extension body 20' have different polarities.

In the present application, the thickness of the base 10 is the same as the thickness of the first extension 20 and the thickness of the second extension 20 ', the base 10 spans across a longitudinal partition or a transverse partition between two unit cells, and the tabs of the two unit cells are fixedly connected to the first extension 20 and the second extension 20', respectively. As shown in fig. 4, i.e., the top ends of the tabs are connected to the bottom ends of the extensions. Under the prerequisite that holds the chamber volume unanimity, first extension 20 and second extension 20 ' are extended in the horizontal direction, and when the top of utmost point ear need be connected with the extension contact, under the prerequisite that does not change utmost point ear length, the accessible changes the height of polar plate (just, negative plate, baffle) and realizes to increase the area of polar plate, along with the increase of polar plate area, can increase battery cell's capacity, and then increase lead acid battery's total capacity.

In addition, there is no connecting section (e.g., welding surface) between the base 10 and the two extending bodies formed as a monolithic structure, and when the base 10 and the two extending bodies are used to connect the tabs with different polarities in the two single batteries, the bridging structure 100 has higher reliability and can meet the operating requirement of high-rate discharge.

After the bridging structure 100 is connected to the tab, it can function as a fixed pole plate and conduct current, and the current conducted between the two is larger at the position where the extension body is closer to the base body 10, and is smaller at the position where the extension body is farther from the base body 10. Accordingly, as the current increases, the amount of heat generated increases, and there is a risk that the fuse extensions are located near the substrate 10, so that in the bridging structure 100 of the present embodiment, from top to bottom along the thickness direction of the bridging structure 100, the width (cross-sectional area) of the substrate 10 and the width (cross-sectional area) of the two extensions are gradually decreased, and thus, the resistance of the extensions near the substrate 10 is increased, and the current at the positions is decreased.

In some embodiments, the longitudinal cross-sectional shape of the base 10 and the two extending bodies may be one or at least two of a semicircle, a square, a triangle, or a diamond.

In this embodiment, the extension has a proximal end connected to the connection site and a distal end remote from the connection site, and the current is concentrated from the distal end to the proximal end and conducted to the base 10 through the connection site, which also generates a large amount of heat and risks fusing the proximal end of the extension. Likewise, this can be avoided by increasing the resistance at the proximal end, i.e., the extension body increases in thickness and width in a direction from the distal end to the proximal end.

Specifically, as shown in fig. 2 and 3, for the sake of illustration, the proximal end and the distal end of the first extension 20 are respectively defined as a first proximal end 21 and a first distal end 22, and the proximal end and the distal end of the second extension 20 ' are respectively defined as a second proximal end 21 ' and a second distal end 22 '. The first proximal end 21 of the first extension 20 is connected to the first connection site 11, the first distal end 22 is far away from the first connection site 11, and the thickness and width of the first extension 20 are gradually increased along the direction from the first distal end 22 to the first proximal end 21, so that the resistance near the base 10 can be increased, and the current at the position can be reduced. The second extension 20 'has a second proximal end 21' near the second connecting portion 12 and a second distal end 22 'far from the second connecting portion 12, and the thickness and width of the second extension 20' are gradually increased along the direction from the second distal end 22 'to the second proximal end 21', so as to increase the resistance near the base 10 and decrease the current flow there.

In this embodiment, the first connection site 11 and the second connection site 12 in the base 10 are two ends of the base 10, respectively, and the first extension 20 on the first connection site 11 and the second extension 20 'on the second connection site 12 are both substantially perpendicular to the base 10 to form a bridging structure 100 with an orthogonal projection shape of H-type (as shown in fig. 2), or the first extension 20 on the first connection site 11 and the second extension 20' on the second connection site 12 are both substantially parallel to the base 10 to form a bridging structure 100 with an orthogonal projection shape of I-type. As shown in fig. 5, it is a specific embodiment in which the H-shaped and I-shaped bridging structure 100 is applied to a secondary battery.

Of course, in other embodiments, the bridging structure 100 may be formed in other shapes, which are different according to the positions of the tab arrangements in the two unit batteries.

In summary, in the bridging structure for connecting the lead-acid battery cells provided by this embodiment, there is no connection section between the substrate and the two extending bodies, and after the extending bodies are connected with the tabs of the cells, the connection reliability can be improved, and the use requirement of high-rate discharge can be met. Moreover, the width of base member and the width of two extension bodies all reduce gradually along thickness direction top-down, simultaneously, the width and the thickness of extension body all increase gradually along the direction of self distal end towards self near-end to increase the resistance that the extension body is close to base member department, effectively reduce the electric current of this department, and then reduce the heat that the electric current flow process produced, avoid the risk of fusing.

The foregoing is a more detailed description of the present application in connection with specific embodiments thereof, and it is not intended that the present application be limited to the specific embodiments thereof. It will be apparent to those skilled in the art from this disclosure that many more simple derivations or substitutions can be made without departing from the inventive concepts herein.

Claims

1. A bridging structure for connecting lead acid battery cells, comprising: a base and two extensions formed as a unitary structure; the thickness of the base body is basically the same as that of the extension body; the base body spans between the two single batteries and is provided with two connecting positions; the two extending bodies are respectively connected to the two connecting positions, and the extending bodies are arranged along the arrangement direction of the lugs with the same polarity in the single battery and are connected with the lugs.

2. The bridging structure for connecting lead acid battery cells as claimed in claim 1, wherein the width of the base and the width of the extensions are gradually reduced from top to bottom along the thickness of the bridging structure.

3. The bridging structure for connecting lead acid battery cells as claimed in claim 2, wherein the extender has a proximal end connected to the connection site, and a distal end remote from the connection site; the extension body has a thickness and a width that both increase in a distal to proximal direction.

4. The bridging structure for connecting lead acid battery cells as claimed in claim 1, wherein the base and the extension are integrally formed by cast welding.

5. Bridging structure for connecting lead acid battery cells according to claim 1, characterised in that the two connection sites are respectively two ends of the substrate, the extensions on both ends being substantially perpendicular to the substrate or substantially parallel to the substrate.

6. The bridging structure for connecting lead acid battery cells according to claim 5, wherein the orthographic projection of the base and the extension forms an H-shape or an I-shape.