Lead-lithium battery assembly structure

Abstract

The utility model discloses a kind of lead changes lithium battery assembly structure, comprising: lead-acid battery shell, it is equipped with the same positive and negative terminal mounting hole with lead-acid battery;Lithium battery group, the positive and negative lead-out wire of lithium battery group corresponds with the positive and negative terminal mounting hole on lead-acid battery shell;Protection plate, welding point corresponding with the positive and negative lead-out wire of lithium battery group is equipped on protection plate;Support, be set in lead-acid battery shell, for fixed protection plate, support is equipped with corresponding positioning structure and screw hole with protection plate;Fastener, pass through protection plate and cooperate with the screw hole on support, to fix protection plate on support.The utility model is fixed in the internal space of lead-acid battery shell accurately, firmly by setting up the support with positioning structure and screw hole, and using fastener to lock, fundamentally eliminates the looseness of protection plate, displacement even shedding present possibly caused by vehicle jolt or equipment vibration.

Description

Technical Field

[0001] This utility model relates to the field of battery structure, and in particular to a lead-to-lithium battery assembly structure. Background Technology

[0002] With the increasing severity of global energy shortages and environmental pollution, the development of efficient and clean new energy storage technologies has become an urgent need to promote sustainable economic and social development. Lithium-ion batteries, with their advantages of high energy density, long cycle life, lightweight design, and environmental friendliness, are gradually replacing traditional lead-acid batteries and becoming the mainstream choice in the power and energy storage fields. Against this backdrop, the "lead-to-lithium" technology has emerged, which involves replacing the internal core of the lead-acid battery with a lithium-ion battery pack while retaining the original lead-acid battery casing and equipment interface, thereby significantly reducing the cost of retrofitting user equipment and minimizing resource waste.

[0003] However, lead-acid batteries and lithium batteries differ fundamentally in structure and working principle. Lithium batteries require a dedicated protection board to provide comprehensive protection against overcharge, over-discharge, overcurrent, and short circuits, while the internal structure of traditional lead-acid battery casings does not provide a reliable mounting location for the protection board. Currently, in common lead-to-lithium battery conversion assembly methods, the protection board is often fixed using adhesive, cable ties, or simple plug-in methods, resulting in inaccurate positioning, easy loosening and detachment, poor shock resistance, and inadequate heat dissipation. This not only affects the long-term stability of the battery pack but also may lead to serious safety accidents due to protection board failure, thus hindering the widespread application of lead-to-lithium battery technology. Utility Model Content

[0004] The purpose of this invention is to provide a lead-to-lithium battery assembly structure to solve the above-mentioned problems.

[0005] According to one aspect of this utility model, a lead-to-lithium battery assembly structure is provided, comprising: a lead-acid battery casing for accommodating a lithium battery pack and a protection plate, wherein the lead-acid battery casing has mounting holes for positive and negative terminals identical to those of the lead-acid battery; a lithium battery pack composed of multiple lithium battery cells connected in series or parallel, wherein the positive and negative leads of the lithium battery pack correspond to the mounting holes for positive and negative terminals on the lead-acid battery casing; a protection plate for protecting the lithium battery pack from overcharging, over-discharging, and overcurrent, wherein the protection plate has welding points corresponding to the positive and negative leads of the lithium battery pack; a bracket disposed within the lead-acid battery casing for fixing the protection plate, wherein the bracket has positioning structures and screw holes corresponding to the protection plate; and fasteners passing through the protection plate and engaging with the screw holes on the bracket to fix the protection plate to the bracket.

[0006] In some embodiments, the welding points on the protection board are connected to the positive and negative leads of the lithium battery pack by spot welding.

[0007] In some embodiments, the support is made of an insulating material.

[0008] In some embodiments, the positioning structure is a positioning post disposed on the bracket, and the protective plate is provided with positioning holes adapted to the positioning post.

[0009] In some embodiments, the fastener is a screw.

[0010] Compared with the prior art, the beneficial effects of this application are as follows:

[0011] This invention, by setting up a bracket with a positioning structure and screw holes and using fasteners for locking, precisely and securely fixes the protection plate within the internal space of the lead-acid battery casing. This fundamentally eliminates the possibility of the protection plate loosening, shifting, or even falling off due to vehicle bumps or equipment vibrations, greatly improving the stability and reliability of the battery pack. This assembly structure cleverly utilizes the existing lead-acid battery casing, making the modification process simple, quick, and easy to operate, significantly improving production assembly efficiency, reducing process difficulty and worker skill requirements. Furthermore, since the bracket and fasteners are simple components with widely available and extremely low-cost raw materials, overall manufacturing costs are effectively controlled, giving this solution high economic value and market potential. Simultaneously, the use of an insulating bracket enhances electrical insulation safety, preventing short-circuit risks. The overall structure is compact and reasonable, fully demonstrating the comprehensive and significant advantages of this invention in improving product safety, reliability, production efficiency, and economic benefits. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a schematic diagram of the structure of the present invention after concealing a portion of the lead-acid battery casing;

[0014] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0015] Figure 4 for Figure 3 A schematic diagram of the structure behind the hidden protective plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] refer to Figures 1 to 4 This application provides a lead-to-lithium battery assembly structure, comprising: a lead-acid battery casing 1 for accommodating a lithium battery pack 2 and a protection plate 3, wherein the lead-acid battery casing 1 has mounting holes for positive and negative terminals identical to those of a lead-acid battery; a lithium battery pack 2 composed of multiple lithium battery cells connected in series or parallel, wherein the positive and negative leads of the lithium battery pack 2 correspond to the mounting holes for positive and negative terminals on the lead-acid battery casing 1; a protection plate 3 for protecting the lithium battery pack 2 from overcharging, over-discharging, and overcurrent, wherein the protection plate 3 has welding points corresponding to the positive and negative leads of the lithium battery pack 2; a bracket 4 disposed within the lead-acid battery casing 1 for fixing the protection plate 3, wherein the bracket 4 has a positioning structure and screw holes 5 corresponding to the protection plate 3; and fasteners passing through the protection plate 3 and engaging with the screw holes 5 on the bracket 4 to fix the protection plate 3 onto the bracket 4.

[0018] In some embodiments, the welding points on the protection plate 3 are connected to the positive and negative leads of the lithium battery pack 2 by spot welding.

[0019] In some embodiments, the support 4 is made of an insulating material.

[0020] In some embodiments, the positioning structure is a positioning post 6 disposed on the bracket 4, and the protective plate 3 is provided with a positioning hole 7 adapted to the positioning post 6.

[0021] In some embodiments, the fastener is a screw.

[0022] The assembly process of this utility model is as follows: First, fix the bracket 4 inside the lead-acid battery casing 1, put in the lithium battery pack 2, and then use welding pads to reliably connect the battery pack and the protection board 3 by spot welding; then, initially position the protection board 3 through the positioning post 6 on the bracket 4, and firmly fasten it to the bracket 4 with screws; finally, connect the output end of the protection board 3 to the original terminal of the casing, and after comprehensive testing, seal the casing to complete the assembly.

[0023] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lead-to-lithium battery assembly structure, characterized in that, include: A lead-acid battery casing for housing a lithium battery pack and a protection board, wherein the lead-acid battery casing is provided with the same positive and negative terminal mounting holes as the lead-acid battery. A lithium battery pack is composed of multiple lithium battery cells connected in series or in parallel, and the positive and negative leads of the lithium battery pack correspond to the positive and negative terminal mounting holes on the casing of the lead-acid battery. A protection board is used to protect the lithium battery pack from overcharging, over-discharging and overcurrent. The protection board is provided with solder points corresponding to the positive and negative leads of the lithium battery pack. A bracket is disposed inside the lead-acid battery casing to fix the protection plate. The bracket is provided with a positioning structure and screw holes corresponding to the protection plate. Fasteners pass through the protective plate and engage with screw holes on the bracket to secure the protective plate to the bracket.

2. The lead-to-lithium battery assembly structure according to claim 1, characterized in that, The welding points on the protection board are connected to the positive and negative leads of the lithium battery pack by spot welding.

3. The lead-to-lithium battery assembly structure according to claim 1, characterized in that, The bracket is made of insulating material.

4. The lead-to-lithium battery assembly structure according to claim 1, characterized in that, The positioning structure is a positioning post set on the bracket, and the protective plate is provided with positioning holes that are adapted to the positioning post.

5. The lead-to-lithium battery assembly structure according to claim 1, characterized in that, The fastener is a screw.

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