Protection structure of long-life lithium iron phosphate battery cell for power

Abstract

The utility model provides a protection structure of a long-life lithium iron phosphate battery cell for power, which relates to the technical field of battery cells, comprises four battery cells, and is characterized in that one end of each of the four battery cells is fixedly connected with a protection circuit board; and the protection assembly is used for protecting the battery cell from being damaged in the conveying process, and the protection assembly is connected with the battery cell and the protection circuit board. The protection assembly is used for protecting the battery cells from being damaged in the conveying process, and the protection assembly can effectively prevent the situation that when the long-life lithium iron phosphate battery cells for power fall onto the ground in the conveying process, the battery cells extrude one another, so that the outer walls of the battery cells are damaged, and the service life of the battery cells is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cells, in particular to a protection structure of a long-life lithium iron phosphate battery cell for power. Background Art

[0002] The long-life lithium iron phosphate battery for power use is a lithium-ion battery that uses lithium iron phosphate (LiFePO4) as the positive electrode material and carbon as the negative electrode material. The single cell rated voltage is 3.2V and the charging cut-off voltage is 3.6V~3.65V. It has the advantages of high operating voltage, high energy density, long cycle life, good safety performance, low self-discharge rate and no memory effect.

[0003] Long-life lithium iron phosphate batteries for power use are often subject to a certain degree of bumps during the delivery process due to different road conditions. During the bumps, the outer walls of the lithium iron phosphate batteries will be physically bumped or even damaged, thereby shortening the service life of the battery and even making it prone to accidents, causing property losses to the manufacturer.

[0004] Existing protection devices generally place several battery cells into a protection box for protected transportation. However, there is no buffer device in the protection box. Once the protection box is accidentally dropped on the ground during transportation, the battery cells in the protection box are squeezed against each other due to inertia, which can easily cause the outer walls of the battery cells to dent, causing a certain degree of damage to the inside of the battery cells and affecting the service life of the battery cells. Therefore, the present application provides a protection structure for long-life lithium iron phosphate battery cells for power use to meet usage requirements. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies in the prior art and to provide a protection structure for long-life lithium iron phosphate batteries for power use, which can achieve the function of preventing long-life lithium iron phosphate batteries for power use from being damaged during transportation and distribution through protection components, thereby solving the problem that in the existing protection box, the protection box is accidentally dropped to the ground during distribution or handling, and the batteries in the protection box are squeezed against each other under the action of inertia, which can easily cause the outer wall of the battery cell to be dented, thereby causing a certain degree of damage to the inside of the battery cell.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protection structure for a long-life lithium iron phosphate battery cell for power use, comprising four battery cells, characterized in that one end of the four battery cells is fixedly connected to a protection circuit board; a protection component, the protection component is used to protect the battery cell from damage during transportation, and the protection component is respectively connected to the battery cell and the protection circuit board.

[0007] Preferably, the protection assembly comprises four groups of buckles clamped on the outer walls of the four battery cells, and a support column is fixedly connected to the outer wall of each group of buckles.

[0008] Preferably, one end of each group of buckles is fixedly connected to an elastic plate.

[0009] Preferably, one end of each group of buckles is slidably connected to four C-shaped sliding clamping plates.

[0010] Preferably, the bottoms of the four C-shaped sliding card plates are fixedly connected to a bottom plate.

[0011] Preferably, a segmented elastic plate is fixedly connected to the top outer wall of the bottom plate.

[0012] Preferably, two first sliding grooves and one second sliding groove are respectively formed on the outer walls of the four C-shaped sliding clamps, and the second sliding groove is slidably connected to an elastic limiting plate.

[0013] Preferably, one end of the segmented elastic plate is fixedly connected to a supporting plate.

[0014] Preferably, the elastic plate abuts against a protective shell.

[0015] Preferably, a protective cover is sleeved on the top of the protective shell.

[0016] The beneficial effects of the utility model are:

[0017] (1) The utility model provides a protective component to protect the battery cells from damage during transportation. The protective component can also effectively prevent the long-life lithium iron phosphate battery cells for power use from falling to the ground, where the battery cells are squeezed against each other, thereby causing damage to the outer wall of the battery cell and affecting the service life of the battery cell.

[0018] (2) The utility model provides a buckle, an elastic plate, and a C-shaped sliding block, and uses the buckle to fix the battery cell, and then uses the elastic plate to support the inner wall of the protective shell. In this way, when the battery cell is bumped during transportation, the elastic plate plays a buffering role.

[0019] (3) The utility model provides an elastic limit plate, which can be used to limit the battery cell and also as a way to fix the protective cover. The semicircular elastic plate on the elastic limit plate is elastic and can support the protective circuit board on the top of the battery cell. At the same time, it provides a buffering effect for the battery cell when the device falls.

[0020] In summary, the utility model has the advantages that when workers are carrying battery cells, the battery cells will not be bumped, thereby preventing the battery cells from being damaged and affecting the service life of the battery cells. At the same time, the operation is simple and convenient for workers to disassemble or assemble the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the protection component of the utility model;

[0024] Figure 4 This is a schematic diagram of the matching structure of the buckle, elastic limiting plate and C-shaped sliding card plate of the utility model;

[0025] Figure 5 for Figure 4 The enlarged structural diagram at A in the middle;

[0026] Figure 6 for Figure 4 Enlarged structural diagram at B in the middle.

[0027] In the figure: 1, protective shell; 101, bottom plate; 2, protective cover; 201, screw; 3, battery cell; 4, protective circuit board; 5, C-shaped sliding card plate; 501, first sliding groove; 502, second sliding groove; 6, elastic limit plate; 601, semicircular elastic plate; 7, buckle; 701, elastic plate; 702, support column; 703, support plate; 704, segmented elastic plate. DETAILED DESCRIPTION

[0028] 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 of 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.

[0029] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] Embodiment 1

[0031] like Figures 1 to 6 As shown, this embodiment provides a protection structure for a long-life lithium iron phosphate battery cell 3 for power, including four battery cells 3, one end of each of the four battery cells 3 being fixedly connected to a protection circuit board 4; a protection component, the protection component being used to protect the long-life battery cells 3 for power from damage during transportation, the protection component being connected to the battery cells 3 and the protection circuit board 4 respectively, specifically, the battery cell 3 is cylindrical, one end of the battery cell 3 is fixedly connected to the protection circuit board 4, and the other end of the battery cell 3 is fixedly connected to the protection circuit board 4 through an electric wire.

[0032] In this embodiment, if Figures 2 to 6 As shown, the protection assembly includes four groups of buckles 7 that are clamped on the outer walls of four battery cells 3, and the outer wall of each group of buckles 7 is fixedly connected to a support column 702, and one end of each group of buckles 7 is fixedly connected to an elastic plate 701. Specifically, the buckle 7 is in the shape of an "8" with an opening at the top, and two elastic plates 701 are fixedly connected at both ends of the opening. The outer walls of the four groups of buckles 7 are fixedly connected to the outer walls of the support column 702, and the two ends of the openings of the four groups of buckles 7 are fixedly connected to the elastic plates 701. When the user needs to use the device, the battery cell 3 can be clamped to a group of buckles 7. Since the buckle 7 is in the shape of an "8" with an opening at the top, it is convenient for the cylindrical outer wall of the battery cell 3 to be squeezed inward along the opening. When the battery cell 3 is completely squeezed in, the opening rebounds to its original state, and the battery cell 3 will be firmly clamped at this time. The above structural setting can not only fix the battery cell 3, but also facilitate the user to take out the battery cell 3.

[0033] One end of each set of buckles 7 is respectively slidably connected with four C-shaped sliding plates 5. The bottoms of the four C-shaped sliding plates 5 are fixedly connected with a bottom plate 101, and two first sliding grooves 501 and one second sliding groove 502 are respectively formed on the outer walls of the four C-shaped sliding plates 5. The second sliding groove 502 is slidably connected with an elastic limiting plate 6. A segmented elastic plate 704 is fixedly connected to the outer wall of the top end of the bottom plate 101. One end of the segmented elastic plate 704 is fixedly connected with a support plate 703. Specifically, one end of each set of buckles 7 is respectively slidably connected with four C-shaped sliding plates 5. The C-shaped sliding plates 5 are in a "C" shape. Two first sliding grooves 501 are symmetrically formed on the C-shaped sliding plates 5. A second sliding groove 502 is formed at the top end of the C-shaped sliding plate 5. The second sliding groove 502 is slidably connected to one end of the elastic limiting plate 6. The elastic limiting plate 6 is in a "Ji" shape, and a screw hole is formed in the middle. On both sides of the screw 201 hole, semi-circular elastic plates 601 protruding towards the bottom plate 101 are symmetrically provided. One end of the segmented elastic plate 704 is fixedly connected to the outer wall of the top end of the bottom plate 101, and the other end of the segmented elastic plate 704 is fixedly connected to the bottom end of the support plate 703. Since the opening of the first sliding groove 501 has an angle, it is convenient for the elastic plate 701 to slide into the first sliding groove 501. At this time, the buckle 7 can slide along the first sliding groove 501 on the inner wall of the C-shaped sliding plate 5. When sliding to a certain distance, the support plate 703 will support the bottom of the battery cell 3, slide the elastic limiting plate 6 into the second sliding groove 502, and the outer walls of the two semi-circular elastic plates 601 on the elastic limiting plate 6 will abut against the protection circuit board 4 to limit the battery cell 3. The above structural settings can facilitate the user to install the battery cell 3 on this device, and the structure is simple and practical.

[0034] An elastic plate 701 abuts against a protective shell 1, and a protective cover 2 is sleeved on the top end of the protective shell 1. Specifically, the elastic plate 701 abuts against the inner wall of the protective shell 1, and a protective cover 2 is sleeved on the top end of the protective shell 1. A screw hole is formed in the protective cover 2. The protective cover 2 and the elastic limiting plate 6 are connected together by a screw 201. Just unscrew the screw 201 on the protective cover 2, and the protective cover 2 can be opened. By sliding, the elastic limiting plate 6 can be taken out, and then the battery cell 3 can be taken out or inserted. The above structural settings can prevent the long-life lithium iron phosphate battery cell 3 for power use from being physically bumped during transportation, resulting in damage to the outer wall of the battery cell 3, thereby shortening the service life of the battery cell. At the same time, it is also convenient for the user to disassemble and assemble it.

[0035] Working steps

[0036] Step 1. When the user needs to carry the long-life battery cell 3 for power, first unscrew the screw 201 on the protective cover 2, then the protective cover 2 can be taken out, and then the buckle 7 is clamped on the outer wall of the battery cell 3. During the clamping process, the buckle 7 will deform as the battery cell 3 is squeezed in. After the battery cell 3 is completely squeezed in, the inner wall of the buckle 7 fits the outer wall of the battery cell 3 and the deformation is restored. Then, the elastic limit plate 6 is slid out of the second sliding groove 502 on the C-shaped sliding card plate 5. At this time, the elastic plate 701 on the buckle 7 is moved along the two first sliding grooves 502 on the C-shaped sliding card plate 5. The sliding groove 501 slides, and the elastic plate 701 abuts against the inner wall of the protective shell 1 while sliding. When sliding to a certain distance, the support plate 703 will support the bottom of the battery cell 3, and slide the elastic limiting plate 6 into the second sliding groove 502. The outer walls of the two semicircular elastic plates 601 on the elastic limiting plate 6 will abut against the protective circuit board 4 to limit the battery cell 3. At this time, the protective cover 2 is covered and the screws 201 are tightened. The protective shell and the protective cover effectively ensure that the long-life lithium iron phosphate battery cell 3 for power will not be subjected to external trauma, resulting in its life being shortened and not suitable for use as power.

[0037] Step 2: When the user accidentally drops the device on the ground during the process of carrying it, the elastic plate 701 abuts against the inner wall of the protective shell 1, and the elastic plate 701 is elastic, so it will be deformed when squeezed, and will rebound and recover after deformation. Similarly, the segmented elastic plate 704 is also elastic. One end of the segmented elastic plate 704 is fixedly connected to the bottom plate 101, and the other end is fixedly connected to the outer wall of the support plate 703. When the support plate 703 is displaced by the inertia of the battery cell 3, the segmented elastic plate 704 will be deformed. After that, it bounces back to its original shape, which has a buffering effect on the battery cell 3. When the elastic limiting plate 6 slides into the second sliding groove 502, the outer walls of the two semicircular elastic plates 601 on the elastic limiting plate 6 will press against the protective circuit board 4 to limit the battery cell 3. Since the semicircular elastic plate 601 is elastic, it is convenient for the protective circuit board 4 to provide a good buffering effect under the inertia of the battery cell 3, so as to avoid collision with the long-life lithium iron phosphate battery cell 3 for power, thereby shortening the life of the long-life lithium iron phosphate battery cell 3 for power, or even making it completely unusable.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protection structure for a long-life lithium iron phosphate battery cell for power, comprising four battery cells, characterized in that: One end of the four battery cells is fixedly connected to a protection circuit board; A protection component, which is used to protect the battery cell from damage during transportation, and is connected to the battery cell and the protection circuit board respectively; The protection assembly includes four groups of buckles clamped on the outer walls of the four battery cells, and a support column is fixedly connected to the outer wall of each group of buckles; One end of each group of buckles is fixedly connected to an elastic plate; One end of each group of buckles is slidably connected to four C-shaped sliding clamping plates; The bottoms of the four C-shaped sliding pallets are fixedly connected with a bottom plate; A segmented elastic plate is fixedly connected to the top outer wall of the bottom plate; Two first sliding grooves and one second sliding groove are respectively provided on the outer walls of the four C-shaped sliding clamps, and the second sliding groove is slidably connected to an elastic limiting plate; One end of the segmented elastic plate is fixedly connected to a supporting plate; The first sliding groove is slidably connected to the elastic plate.

2. The protective structure of a long-life lithium iron phosphate battery cell for power use according to claim 1, characterized in that: The elastic plate is in contact with a protective shell.

3. The protective structure of a long-life lithium iron phosphate battery cell for power use according to claim 2, characterized in that: A protective cover is sleeved on the top of the protective shell.

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