A steel plate structure for restraining soft-pack batteries
By adding steel plates at both ends of the lithium battery module and combining the structure of plastic steel strip, EVA buffer sheet and lithium battery adapter plate, the problem of traditional soft-pack lithium battery modules being poorly bound when the battery cell expands, achieving extended battery life and improved safety.
Patent Information
- Application Number
- CN202323641197.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2033-12-29
AI Technical Summary
When the battery cell expands, the tape cannot be effectively bound, resulting in a shortened battery life and safety hazards.
The method of adding steel plates at both ends of the battery module and then using plastic steel belt to tie the module, combining the EVA buffer sheet and lithium battery adapter plate to effectively restrict the expansion of the battery cell.
It slows down the battery life decay, improves product safety, and is low in cost. It also adds a lithium battery adapter board structure for battery use in series.
Smart Images
Figure CN222749603U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium batteries, and in particular to a steel plate structure for restraining soft-pack batteries. Background Art
[0002] Traditional soft-pack lithium battery modules are generally fixed by tape. During use, the battery cells will expand and the tape cannot effectively restrain the expansion of the battery, thereby shortening the battery life and even causing safety hazards. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a steel plate structure for restraining soft-pack batteries by adding steel plates at both ends of a battery module and then using plastic-steel belts to tie up the module, thereby effectively restraining the expansion of the battery core.
[0004] The technical solution adopted by the utility model is a steel plate structure for restraining soft-pack batteries, comprising soft-pack battery cells, a lithium battery adapter plate, an EVA buffer sheet, a steel plate, and a plastic-steel belt, wherein a soft-pack battery cell is sandwiched between every two steel plates.
[0005] As a further solution of the utility model: the lithium battery adapter board is composed of a PCB base plate, a nickel-plated copper sheet, a voltage collection terminal, and a patch pin, wherein the nickel-plated copper sheet, the voltage collection terminal, and the patch pin are all welded to the PCB base plate by a patch welding process, the patch pins serve as the positive and negative output terminals of the battery module, the voltage collection terminal serves as the port for battery voltage collection, and the nickel-plated copper sheet is connected in series and parallel by means of PCB copper cladding.
[0006] As a further solution of the utility model: the steel plate is formed by cutting and bending steel, and an upper bent short plate and a lower bent short plate are fixed on both sides of the steel plate, and the surface is painted. The upper bend can increase the compressive strength of the steel plate, and the lower bend can play a limiting role, and can also prevent damage to the battery cell when the plastic steel belt is bundled.
[0007] As a further solution of the utility model: the positive and negative pole ears of the soft-pack battery cell are evenly welded to the corresponding copper nickel-plated sheets by laser welding, and the plastic steel belt is placed in the groove formed by the bend under the steel plate. The setting of the groove can prevent the plastic steel belt from sliding when the battery cell expands. An EVA buffer sheet is sandwiched between the steel plate and the battery cell, which can absorb the displacement caused by the expansion of the battery cell and prevent the steel plate from squeezing and damaging the battery cell during bundling.
[0008] Compared with the prior art, the advantages of the utility model are: this patent adopts the method of adding steel plates at both ends of the external battery and then using plastic-steel belts to bundle the module to restrain the expansion of the battery core, slow down the battery life attenuation rate, improve product safety, and have low cost, and add a lithium battery adapter plate structure to connect the external battery packs in series to facilitate the use of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0010] Figure 1 This is a three-dimensional diagram of the overall structure of a steel plate structure for restraining a soft-pack battery in the utility model.
[0011] Figure 2 It is an exploded stereoscopic diagram of the overall structure of a steel plate structure for restraining a soft-pack battery in the utility model.
[0012] In the attached figure:
[0013] 1. Soft-pack battery cell; 2. Lithium battery adapter board; 3. Steel plate; 4. Plastic steel belt; 5. EVA buffer sheet; 2-1. Voltage collection terminal; 2-2. Nickel-plated copper sheet; 2-3. SMD pin; 2-4. PCB base plate. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] The utility model provides a technical solution to solve the existing problems raised in the background technology.
[0016] Combined with Figure 1 It can be known that the device includes a soft-pack battery cell 1, a lithium battery adapter plate 2, an EVA buffer sheet 5, a steel plate 3, and a plastic-steel belt 4, and a soft-pack battery cell 1 is sandwiched between every two steel plates 3.
[0017] The lithium battery adapter board 2 is composed of a PCB base plate 2-4, a copper nickel-plated sheet 2-2, a voltage collection terminal 2-1, and a patch pin 2-3, wherein the copper nickel-plated sheet 2-2, the voltage collection terminal 2-1, and the patch pin 2-3 are all welded to the PCB base plate 2-4 by a patch welding process, the patch pin 2-3 serves as the positive and negative output terminals of the battery module, the voltage collection terminal 2-1 serves as the port for battery voltage collection, and the copper nickel-plated sheet 2-2 is connected in series and parallel by means of PCB copper cladding; the steel plate 3 is formed by cutting and bending steel, and upper folding The upper bending short plate and the lower bending short plate are treated with baking varnish on the surface. The upper bending can increase the compressive strength of the steel plate 3, and the lower bending can play a limiting role, and can also prevent the plastic-steel belt 4 from damaging the battery cell when bundling; the positive and negative pole ears of the soft-pack battery cell 1 are evenly welded to the corresponding copper nickel-plated sheet 2-2 by laser welding, and the plastic-steel belt 4 is placed in the groove formed by the lower bending of the steel plate 3. The setting of the groove can prevent the plastic-steel belt 4 from sliding when the battery cell expands. An EVA buffer sheet 5 is sandwiched between the steel plate 3 and the soft-pack battery cell 1, which can absorb the displacement caused by the expansion of the battery cell and prevent the steel plate 3 from squeezing and damaging the battery cell during bundling.
[0018] The working principle of the present application is as follows: when assembling the battery pack, firstly, the soft-pack battery cell 1 is clamped between every two steel plates 3. Before clamping, an EVA buffer sheet 5 is clamped between the steel plate 3 and the soft-pack battery cell 1. Then, the positive and negative pole ears of the soft-pack battery cell 1 are welded into a group by laser welding. Then, they are evenly welded to the corresponding red copper nickel-plated sheet 2-2 by laser welding to make an electrical connection. Then, the plastic steel belt 4 is placed in the groove formed by the bending under the steel plate 3 for bundling, so as to facilitate the assembly and fixation of the entire lithium battery pack.
[0019] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.
Claims
1. A steel plate structure for restraining soft-pack batteries, characterized in that: It comprises a soft-pack battery cell (1), a lithium battery adapter plate (2), an EVA buffer sheet (5), a steel plate (3), and a plastic-steel belt (4), wherein the soft-pack battery cell (1) is sandwiched between every two steel plates (3); The lithium battery adapter board (2) is composed of a PCB base plate (2-4), a nickel-plated copper sheet (2-2), a voltage collection terminal (2-1), and a patch pin (2-3); The positive and negative pole tabs of the soft-pack battery cell (1) are uniformly welded to the corresponding nickel-plated copper sheet (2-2) by laser welding, the plastic steel strip (4) is placed in the groove formed by the lower bend of the steel plate (3), and an EVA buffer sheet (5) is sandwiched between the steel plate (3) and the soft-pack battery cell (1); The plastic-steel belt (4) is placed in the groove formed by the lower bend of the steel plate (3) for bundling.
2. The steel plate structure for restraining soft-pack batteries according to claim 1, characterized in that: The nickel-plated copper sheet (2-2), the voltage collection terminal (2-1), and the patch pins (2-3) are all welded to the PCB bottom plate (2-4) by using a patch welding process, and the nickel-plated copper sheet (2-2) is connected in series and in parallel by means of PCB copper cladding.
3. The steel plate structure for restraining soft-pack batteries according to claim 1, characterized in that: The steel plate (3) is formed by cutting and bending steel materials, and an upper bent short plate and a lower bent short plate are fixed on both sides of the steel plate (3).