Partition plate for preventing short circuit of battery busbar

Abstract

The utility model provides a partition plate for preventing short circuit of a battery busbar, which is arranged between a primary busbar and a secondary busbar of a storage battery plate group and comprises an insulating plate, the long side edge of the insulating plate is parallel to the length direction of the primary busbar, and the long side edge of the insulating plate is provided with a notch structure for providing a clearance space for an acid adding port of a storage battery. The device is simple and reasonable in structure and high in integrity, and is arranged between a primary busbar and a secondary busbar of a storage battery plate group, so that the primary positive busbar and the secondary negative busbar are prevented from being insulated and isolated, the primary positive busbar and the secondary negative busbar are prevented from being short-circuited, and the failure of a lead-acid storage battery is avoided; and the structure is simple, installation is easy, maintenance is convenient, applicability is wide, and application and popularization are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of lead-acid battery technology; specifically, it relates to a separator for preventing short circuits in battery busbars. Background Technology

[0002] During use, lead dioxide in the positive plate of a lead-acid battery converts to lead sulfate during charging, causing it to expand in volume; during discharging, lead sulfate converts back to lead dioxide, causing it to shrink in volume. This repeated expansion and contraction weakens the bonding between active material particles, leading to a looser structure and eventual detachment, ultimately resulting in overall expansion. The expansion of the positive plate causes the height of the positive busbar to rise, while the negative busbar does not. This can cause the primary positive busbar to approach and contact the secondary negative busbar (the secondary negative parallel lead strip), increasing the risk of a short circuit in the lead-acid battery. Short circuits in lead-acid batteries manifest primarily in the following ways:

[0003] (1) The open circuit voltage is low, and the closed circuit voltage (discharge) quickly reaches the termination voltage.

[0004] (2) When the large current is discharged, the terminal voltage drops rapidly to zero.

[0005] (3) When the circuit is open, the electrolyte density is very low, and the electrolyte will freeze in a low temperature environment.

[0006] (4) The voltage rises very slowly during charging and remains low (sometimes dropping to zero).

[0007] (5) The electrolyte temperature rises very quickly during charging.

[0008] (6) The electrolyte density increases very slowly or almost does not change during charging.

[0009] (7) No bubbles appear during charging or the bubbles appear very late.

[0010] A short circuit between the positive and negative terminals of a lead-acid battery will eventually lead to battery failure. Utility Model Content

[0011] Therefore, the purpose of this utility model is to design a separator for preventing short circuits in battery busbars, which is set between the primary busbar and the secondary busbar of the battery terminal group to insulate and isolate the primary busbar and the secondary busbar, prevent short circuits between the primary busbar and the secondary busbar, and avoid lead-acid battery failure; and it has a simple structure, easy assembly process, and wide applicability.

[0012] This utility model provides a separator for preventing short circuits in battery busbars, which is disposed between the primary busbar and the secondary busbar of a battery terminal group. It includes an insulating plate, the long side of which is parallel to the length direction of the primary busbar, and a notch structure on the long side of the insulating plate to provide a clearance space for the battery acid filling port.

[0013] Specifically, a primary busbar refers to a busbar that connects the plates within the same cell in parallel. A primary busbar includes a primary positive busbar and a primary negative busbar. A secondary busbar refers to a busbar that connects different cells in parallel to form a single cell. A secondary busbar includes a secondary positive busbar and a secondary negative busbar.

[0014] This utility model features a specially designed separator to prevent short circuits in the busbars. This separator is placed between the primary and secondary busbars of the battery terminal group, insulating and isolating the primary and secondary busbars. The insulating material of the separator prevents short circuits caused by contact between the primary and secondary busbars, ensuring that the positive and negative terminals of the battery remain insulated, thus avoiding the risk of short circuits and improving battery safety.

[0015] Preferably, the insulating board is made of acid-resistant and high-temperature-resistant insulating material, such as PVC (polyvinyl chloride) board or PE (polyethylene) board.

[0016] By designing the notch structure on the insulating plate to prevent air leakage, acid can be smoothly added to the battery acid filling port below the insulating plate to complete the battery acid filling operation. This will not block the battery acid filling port or cause the inability to add acid due to the addition of a short-circuit protection partition.

[0017] Furthermore, the insulating plate has a circular through hole in the middle for passing through the parallel pole on the primary busbar, and the top of the parallel pole extends upward from the upper opening of the circular through hole.

[0018] Since the positive and negative busbars of the primary busbar are both welded with parallel terminals for connecting multiple battery groups in parallel, and these parallel terminals protrude from the surface of the primary busbar, by installing parallel lead strips on the parallel terminals of the primary busbar, a secondary busbar is formed, which can connect multiple individual battery cells into a single battery, thereby improving battery stability and reliability. Therefore, this utility model addresses the protruding terminal structure on the busbar by providing a circular through hole in the middle of the separator corresponding to the position of the parallel terminals, allowing the parallel terminals to extend upwards from the circular through hole, facilitating the installation of parallel lead strips on the parallel terminals.

[0019] Furthermore, the notch structure is a rectangular opening, the length direction of which is parallel to the long side of the insulating plate, and the width direction of which is parallel to the short side of the insulating plate.

[0020] If the rectangular opening is too long along the shorter side of the insulating board, significant stress concentration will occur during its fabrication, potentially causing deformation and warping of the insulating board, thus reducing its overall structural strength and rigidity. Therefore, this invention aligns the longer side (length direction) of the rectangular opening with the longer side of the insulating board, and the wider side (width direction) with the shorter side, making the rectangular opening shorter along the shorter side. This design reduces localized stress during fabrication, ensuring the overall structural strength and rigidity of the insulating board.

[0021] Furthermore, the primary busbar includes a primary positive busbar and a primary negative busbar, and the secondary busbar includes a secondary positive busbar and a secondary negative busbar; the lower surface of the insulating plate is attached to the top of the primary positive busbar or the primary negative busbar, and the upper surface of the insulating plate is located below the lower surface of the secondary positive busbar or the secondary negative busbar.

[0022] The insulating plate is attached to the primary positive or negative busbar to prevent the primary positive busbar from contacting the secondary negative busbar (i.e., the parallel lead strip) due to expansion and rise, which could cause a short circuit in the lead-acid battery. Through a reasonable height design of the insulating plate, it is possible to attach the plate to the primary positive or negative busbar while also facilitating the installation of the secondary busbar (parallel lead strip) on the parallel terminals, forming a electrode group and thus improving battery stability.

[0023] Furthermore, the inner wall of the circular through hole and the outer cylindrical surface of the parallel pole are fitted with a clearance.

[0024] In the application environment of this utility model, it is necessary to quickly and conveniently pass the parallel poles through the partition, thus requiring high precision in the shape and position of the circular through hole. The clearance fit can compensate for errors and deviations in the processing to a certain extent, allowing the parallel poles to pass smoothly through the partition and ensuring convenient and efficient installation and disassembly.

[0025] Furthermore, since clearance fits allow parts a certain range of free movement when the temperature changes, they can better adapt to thermal expansion and contraction caused by temperature changes, reducing deformation and stress concentration caused by thermal expansion.

[0026] Specifically, when installing and removing the partitions on-site, insulated gloves or insulated tools must be worn, and a sufficient distance must be maintained from the live positive busbar. Furthermore, it is essential to ensure that the partitions do not fall during placement and use to avoid damaging the structure and reducing electrical isolation performance.

[0027] Furthermore, the short sides of the insulating plate are flush with the short sides of the positive or negative busbar of the primary busbar, respectively.

[0028] If the insulation board is too long, it may scratch the battery casing during operation or make installation impossible; if the insulation board is too short, there is still a possibility of short circuit near the positive and negative busbars that are not covered by the insulation board.

[0029] Furthermore, the short side width of the insulating plate exceeds the center distance between two adjacent primary busbars connected in parallel.

[0030] The shorter side width of the insulating board is greater than the center distance between two adjacent primary busbars connected in parallel. This ensures that the circular through-holes in the insulating board are positioned as centrally as possible, away from the edges, preventing incomplete or misaligned holes. This approach guarantees the structural strength of the insulating board while facilitating the fabrication of the circular through-holes.

[0031] Furthermore, the thickness of the insulating plate is between the thickness of the primary positive busbar and the thickness of the primary negative busbar.

[0032] The thicknesses of the positive and negative busbars in a battery are typically different. Specifically, the negative busbar is usually 20% thicker than the positive busbar. By designing a suitable thickness for the insulation board, the dielectric properties can be further improved, providing sufficient electrical insulation strength, effectively preventing electrical breakdown, and ensuring that insulation failure does not occur under high voltage.

[0033] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0034] The separator structure for short-circuit protection of battery busbars provided by this utility model is simple and reasonable, with strong overall integrity. It is set between the primary and secondary busbars of the battery terminal group, insulating and isolating the primary and secondary busbars, effectively preventing short circuits between the primary positive busbar and the secondary negative busbar, and avoiding lead-acid battery failure. In addition, it has a simple structure, is easy to install and maintain, has wide applicability, and has broad prospects for promotion and application. Attached Figure Description

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0036] Figure 1 This is a structural diagram of the partition in an embodiment of the present utility model;

[0037] Figure 2 This is an installation diagram of the separator inside the battery according to an embodiment of the present invention.

[0038] The markings in the attached figure are as follows:

[0039] 1. Insulating plate; 2. Circular through hole; 3. Notched structure; 4. Primary positive busbar; 5. Primary negative busbar; 6. Secondary positive busbar; 7. Secondary negative busbar; 8. Parallel terminals. Detailed Implementation

[0040] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] In the description of this utility model, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings:

[0044] Example

[0045] This utility model embodiment provides a separator for preventing short circuits in battery busbars. It is disposed between the primary busbar (including primary positive busbar 4 and primary negative busbar 5) and the secondary busbar (including secondary positive busbar 6 and secondary negative busbar 7) of the battery terminal group, and uses acid-resistant and high-temperature-resistant PVC material as the insulating plate 1. The insulating plate 1 prevents short circuits caused by contact between the primary positive busbar 4 and the secondary negative busbar 7, maintaining insulation between the positive and negative terminals of the battery, avoiding the risk of short circuits, and improving battery safety. The long side of the insulating plate 1 is parallel to the length direction of the primary positive busbar 4, and a notch structure 3 is provided on the long side of the insulating plate 1 to provide clearance for the battery's acid filling port. The notch structure 3 is a rectangular opening, with its length parallel to the long side of the insulating plate 1 and its width parallel to the short side of the insulating plate 1. The long side (length direction) of the rectangular opening corresponds to the long side of the insulating plate 1, and the wide side (width direction) corresponds to the short side of the insulating plate 1 (e.g., Figure 1 As shown, the rectangular opening is made shorter along the shorter side of the insulating plate 1, resulting in less local stress during processing and ensuring the overall structural strength and rigidity of the insulating plate 1. By designing the notch structure 3 on the insulating plate 1 to avoid gaps, acid can be smoothly added to the battery acid filling port below the insulating plate 1, completing the battery acid filling operation.

[0046] A circular through-hole 2 is provided in the middle of the insulating plate 1 for the parallel terminals 8 on the primary positive busbar 4 and the primary negative busbar 5 to pass through. The top of the parallel terminal 8 extends upward from the upper opening of the circular through-hole 2. Parallel terminals 8 for connecting multiple battery groups in parallel are welded onto both the primary positive busbar 4 and the primary negative busbar 5. The parallel terminals 8 protrude from the surface of the primary busbar. By installing secondary busbars (parallel lead bars) on the parallel terminals 8, multiple individual battery cells (terminal groups) can be connected in parallel into a single battery cell (terminal group), thereby improving battery stability and reliability. In this embodiment, for the protruding terminal structure on the busbar, a circular through-hole 2 is provided in the middle of the separator corresponding to the position of the parallel terminal 8, allowing the parallel terminal 8 to extend upward from the circular through-hole 2, facilitating the installation of parallel lead bars on the parallel terminal 8. A clearance fit is used between the inner wall of the circular through-hole 2 and the outer cylindrical surface of the parallel terminal 8. The clearance fit can compensate for errors and deviations in the processing. Even if the shape and positional accuracy of the circular through hole 2 are not high, the parallel pole 8 can still pass smoothly through the partition, ensuring quick and convenient installation and disassembly. When installing and disassembling the partition on site, workers must wear insulated gloves or use insulated tools to operate, and maintain a sufficient distance from the energized primary positive busbar 4; at the same time, it is also necessary to ensure that the partition does not fall during placement and use to avoid damaging the structure and reducing electrical isolation performance.

[0047] The lower surface of the insulating plate 1 rests against the top of the primary positive busbar 4 or the primary negative busbar 5, while the upper surface of the insulating plate 1 is located below the top of the parallel terminal post 8. The insulating plate 1 rests against the primary positive busbar 4 or the primary negative busbar 5 to prevent the primary positive busbar 4 from expanding and rising, thus preventing it from contacting the secondary negative busbar 7 and causing a short circuit in the lead-acid battery. The height of the insulating plate 1 is designed to allow it to rest against the primary positive busbar 4 or the primary negative busbar 5 while also facilitating the installation of parallel lead strips on the parallel terminal post 8.

[0048] The short sides of the insulating plate 1 are flush with the short edges of the primary positive busbar 4 or the primary negative busbar 5. The short sides of the insulating plate 1 coincide with the outer short edges of the primary positive busbar 4 or the primary negative busbar 5. The width of the short sides of the insulating plate 1 exceeds the center-to-center distance between two adjacent primary busbars connected in parallel. Figure 2 As shown, the short side width of the insulating plate 1 is 190mm, and the center distance between two adjacent primary busbars connected in parallel is 161mm. This ensures that the circular through-hole 2 on the insulating plate 1 is positioned as close as possible to the center of the insulating plate 1, away from its edge (e.g., ...). Figure 1 As shown in the figure, this avoids drilling holes on the edge, which can cause problems such as incomplete holes or misaligned holes. This facilitates the processing of the circular through hole 2 and ensures the structural strength of the insulation board 1.

[0049] The thickness of the insulating board 1 is between the thickness of the primary positive busbar 4 and the thickness of the primary negative busbar 5. This thickness of the insulating board 1 provides sufficient electrical insulation strength to prevent electrical breakdown and ensures that insulation failure will not occur under high voltage.

[0050] The separator structure for short-circuit protection of the battery busbar in this embodiment is simple and reasonable, with strong overall integrity. It is set between the primary busbar and the secondary busbar of the battery terminal group, insulating and isolating the primary busbar and the secondary busbar, effectively preventing short circuit between the primary positive busbar and the secondary negative busbar, and avoiding the failure of lead-acid batteries. In addition, it has a simple structure, is easy to install, easy to maintain, and has wide applicability.

[0051] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A separator for short-circuit protection of battery busbars, characterized in that, The device is positioned between the primary busbar and the secondary busbar of the battery terminal group, and includes: an insulating plate, wherein the long side of the insulating plate is parallel to the length direction of the primary busbar, and a notch structure is provided on the long side of the insulating plate to provide a clearance space for the battery acid filling port.

2. The separator for short-circuit protection of battery busbars according to claim 1, characterized in that, The insulating plate has a circular through hole in the middle for passing through the parallel pole on the primary busbar, and the top of the parallel pole extends upward from the upper opening of the circular through hole.

3. The separator for short-circuit protection of battery busbars according to claim 1, characterized in that, The notch structure is a rectangular opening, the length of which is parallel to the long side of the insulating plate, and the width of which is parallel to the short side of the insulating plate.

4. The separator for short-circuit protection of battery busbars according to claim 3, characterized in that, The primary busbar includes a primary positive busbar and a primary negative busbar, and the secondary busbar includes a secondary positive busbar and a secondary negative busbar; the lower surface of the insulating plate is attached to the top of the primary positive busbar or the primary negative busbar, and the upper surface of the insulating plate is located below the lower surface of the secondary positive busbar or the secondary negative busbar.

5. The separator for short-circuit protection of battery busbars according to claim 2, characterized in that, The inner wall of the circular through hole and the outer cylindrical surface of the parallel pole are fitted with a clearance.

6. The separator for short-circuit protection of battery busbars according to claim 1, characterized in that, The short sides of the insulating plate are flush with the short sides of the positive or negative busbar of the primary busbar, respectively.

7. The separator for short-circuit protection of battery busbars according to claim 2, characterized in that, The short side width of the insulating plate exceeds the center distance between two adjacent primary busbars connected in parallel.

8. The separator for short-circuit protection of battery busbars according to claim 4, characterized in that, The thickness of the insulating plate is between the thickness of the primary positive busbar and the thickness of the primary negative busbar.

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