Protective bottom plate structure for automotive lithium iron phosphate battery

Abstract

The utility model discloses a protective bottom plate structure for an automotive lithium iron phosphate battery, relates to the technical field of lithium batteries, and solves the problems that when a pedal underframe of an electric vehicle is scratched or impacted to deform, the deformed underframe can extrude local parts of the lithium iron phosphate battery of the electric vehicle, and the service life of the lithium iron phosphate battery is prolonged. The bottom plate comprises a bottom plate body and further comprises a plurality of protection structures which are installed on the lower side of the bottom plate body and used for protecting the lithium iron phosphate battery, the multiple protection structures are distributed at equal intervals, and each protection structure comprises a hollow pipe located on the lower side of the bottom plate body; by installing the protection structure, the possibility that the bottom plate deforms can be effectively reduced, the situation that the bottom plate deforms and extrudes the lithium iron phosphate battery is avoided, by arranging the embedded pipe and the filling cotton in the hollow pipe, the bending resistance of the hollow pipe can be effectively enhanced, the strength of the protection structure is higher, and by arranging the filling cotton in the hollow pipe, the service life of the protection structure is prolonged. And the hollow pipe can be effectively damped.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a protective bottom plate structure of a lithium iron phosphate battery for a vehicle. Background Art

[0002] Lithium iron phosphate battery is a lithium-ion battery that uses lithium iron phosphate as the positive electrode material and carbon as the negative electrode material. Due to the high safety and long cycle life of lithium iron phosphate, it is widely used in some high-end electric bicycle products.

[0003] In order to have a larger storage space, existing electric vehicles will install lithium iron phosphate batteries under the pedals of the electric vehicles, and this is also helpful for lowering the center of gravity of the electric vehicles. However, since the lithium iron phosphate battery is installed under the pedals of the electric vehicles, when the pedal chassis of the electric vehicle is deformed by scratches or impacts, the deformed chassis will squeeze part of the lithium iron phosphate battery of the electric vehicle, thereby affecting the normal operation of the lithium iron phosphate battery of the electric vehicle and shortening the service life of the lithium iron phosphate battery. Utility Model Content

[0004] The purpose of the utility model is to provide a protective bottom plate structure for a lithium iron phosphate battery for a vehicle, which can protect the lithium battery and solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective bottom plate structure for a vehicle lithium iron phosphate battery, comprising a bottom plate body, and also comprising a plurality of protective structures installed on the lower side of the bottom plate body and used to protect the lithium iron phosphate battery, and the plurality of protective structures are distributed at equal distances, the protective structure comprising a hollow tube located on the lower side of the bottom plate body, connecting shafts are fixedly embedded at both ends of the hollow tube, a ring is movably sleeved on the outer side of the connecting shaft, and a pin is fixedly embedded on the outer side of the ring.

[0006] Preferably, the pin passes through the base plate body, and the pin can move up and down inside the base plate body, and the cross-sectional shape of the pin is circular.

[0007] Preferably, an anti-slip sheet is fixedly sleeved on the upper end of the pin, and the anti-slip sheet can prevent the pin from detaching from the base plate. A spring is movably sleeved on the outer side of the pin, which is located between the base plate body and the collar.

[0008] Preferably, two ends of the spring are movably abutted against the base plate body and the sleeve ring respectively, the spring can drive the pin to move downward, and an embedded tube is fixedly embedded in the interior of the hollow tube.

[0009] Preferably, the space between the embedded tube and the hollow tube and the interior of the embedded tube are filled with filling cotton, and the embedded tube and the hollow tube are fixedly welded.

[0010] Preferably, the hollow tube is rotatably connected to the collar via the connecting shaft, the inner ring diameter of the collar is equal to the diameter of the connecting shaft, and the cross-sectional shape of the hollow tube is annular.

[0011] Preferably, the embedded tube has a triangular cross-sectional shape, and the embedded tube with a triangular cross-sectional shape has good bending resistance. The length of the embedded tube is equal to the length of the filling cotton, and a buffer pad is fixedly installed at the bottom of the base plate body.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model installs a protective structure, in which the hollow tube can roll on the surface of the obstacle, which can reduce the friction between the obstacle and the hollow tube. The hollow tube can be raised and lowered within a certain range, which can buffer the hollow tube, thereby effectively reducing the deformation of the bottom plate body and avoiding the deformation of the bottom plate body and squeezing the lithium iron phosphate battery.

[0014] 2. The utility model arranges an embedded tube and filling cotton inside the hollow tube. Both the hollow tube and the embedded tube are hollow structures, which can reduce the weight of the protective structure and thus reduce the burden on the electric vehicle. The embedded tube with a triangular cross-sectional shape can effectively enhance the bending resistance of the hollow tube, making the strength of the protective structure higher. The filling cotton filled inside can effectively reduce the shock of the hollow tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the separation of the protective structure and the base plate of the utility model;

[0017] Figure 3 This is a schematic diagram of the disassembly of the protective structure of the utility model;

[0018] Figure 4 It is a side sectional schematic diagram of the hollow tube of the utility model.

[0019] In the figure: 1. Bottom plate body; 2. Protective structure; 201. Hollow tube; 202. Connecting shaft; 203. Ring; 204. Pin; 205. Anti-slip sheet; 206. Spring; 207. Embedded tube; 208. Filling cotton; 3. Buffer pad. DETAILED DESCRIPTION

[0020] 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.

[0021] Embodiment 1

[0022] See also Figure 1 , Figure 2 The figure shows a protective bottom plate structure for a lithium iron phosphate battery for a vehicle, including a bottom plate body 1, and also includes a plurality of protective structures 2 installed on the lower side of the bottom plate body 1 and used to protect the lithium iron phosphate battery, and the plurality of protective structures 2 are distributed at equal distances. The protective structure 2 includes a hollow tube 201 located on the lower side of the bottom plate body 1, and connecting shafts 202 are fixedly embedded at both ends of the hollow tube 201. A ring 203 is movably sleeved on the outer side of the connecting shaft 202, and a pin 204 is fixedly embedded on the outer side of the ring 203.

[0023] See also Figure 2 The pin 204 passes through the bottom plate body 1, and the pin 204 can move up and down inside the bottom plate body 1, and the cross-sectional shape of the pin 204 is circular.

[0024] See also Figure 3 The upper end of the pin 204 is fixedly sleeved with an anti-slip sheet 205, which can prevent the pin 204 from detaching from the base plate body 1. The outer side of the pin 204 is located between the base plate body 1 and the ring 203 and is movably sleeved with a spring 206. The two ends of the spring 206 are respectively movably abutted against the base plate body 1 and the ring 203. The spring 206 can drive the pin 204 to move downward, and an embedded tube 207 is fixedly embedded in the interior of the hollow tube 201.

[0025] See also Figure 4 The space between the embedded tube 207 and the hollow tube 201 and the inside of the embedded tube 207 are filled with filling cotton 208. The embedded tube 207 and the hollow tube 201 are fixedly welded. The hollow tube 201 is rotatably connected to the ring 203 through the connecting shaft 202. The inner ring diameter of the ring 203 is equal to the diameter of the connecting shaft 202. The cross-sectional shape of the hollow tube 201 is circular.

[0026] The working principle of protecting lithium batteries: when the protective structure 2 hits an obstacle on the road, the obstacle squeezes the hollow tube 201 in the protective structure 2. Under the condition that the pin 204 can move up and down inside the bottom plate body 1, the hollow tube 201 is squeezed by the obstacle and moves up, which is beneficial to buffer the hollow tube 201 and prevent the hollow tube 201 from directly hitting the obstacle. After the obstacle squeezes the hollow tube 201, the electric vehicle continues to drive, causing the hollow tube 201 to roll on the surface of the obstacle, thereby reducing the friction between the hollow tube 201 and the obstacle, preventing the bottom plate body 1 from directly scratching the obstacle and causing deformation, thereby reducing the possibility of the bottom plate body 1 deforming and squeezing the lithium iron phosphate battery, and can protect the lithium iron phosphate battery installed on the bottom plate body 1.

[0027] Embodiment 2

[0028] See also Figure 4 This embodiment further illustrates the first embodiment. The cross-sectional shape of the embedded tube 207 is triangular. The embedded tube 207 with a triangular cross-sectional shape has good bending resistance. The length of the embedded tube 207 is equal to the length of the filling cotton 208.

[0029] In this embodiment: when the hollow tube 201 is squeezed by an obstacle, the embedded tube 207 with a triangular internal cross-sectional shape can support the hollow tube 201. Under the condition that the triangle is stable, the embedded tube 207 with a triangular cross-sectional shape can effectively enhance the bending resistance of the hollow tube 201, so that the strength of the protective structure 2 is higher. In addition, both the hollow tube 201 and the embedded tube 207 are hollow structures, which can reduce the weight of the protective structure 2, thereby reducing the burden on the electric vehicle. The filling cotton 208 filled inside the hollow tube 201 and the embedded tube 207 can also reduce the shock of the hollow tube 201.

[0030] Embodiment 3

[0031] See also Figure 2 This embodiment further illustrates other embodiments that a buffer pad 3 is fixedly installed at the bottom of the base plate body 1.

[0032] In this embodiment: when the hollow tube 201 is squeezed and moved upward by an obstacle, the buffer pad 3 buffers the hollow tube 201, which can effectively prevent the hollow tube 201 from directly hitting the bottom plate body 1 and causing the bottom plate body 1 and the lithium battery to vibrate, and in the process of the hollow tube 201 contacting and rotating with the buffer pad 3, impurities such as stones attached to the surface of the hollow tube 201 due to the hollow tube 201 squeezing the obstacle can also be removed.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include"-"comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process-method-article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process-method-article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protective bottom plate structure for a lithium iron phosphate battery for a vehicle, comprising a bottom plate body (1), characterized in that: Also includes: A plurality of protective structures (2) are installed on the lower side of the base plate body (1) and are used to protect the lithium iron phosphate battery. The plurality of protective structures (2) are distributed at equal distances. The protective structure (2) comprises a hollow tube (201) located on the lower side of the base plate body (1). Connecting shafts (202) are fixedly embedded at both ends of the hollow tube (201). A collar (203) is movably sleeved on the outer side of the connecting shaft (202). A pin (204) is fixedly embedded on the outer side of the collar (203).

2. The protective bottom plate structure of a lithium iron phosphate battery for a vehicle according to claim 1, characterized in that: The pin (204) passes through the base plate body (1), and the pin (204) is able to move up and down inside the base plate body (1).

3. The protective bottom plate structure of a lithium iron phosphate battery for a vehicle according to claim 2, characterized in that: An anti-drop sheet (205) is fixedly sleeved on the upper end of the pin (204), and a spring (206) is movably sleeved on the outer side of the pin (204) between the base plate body (1) and the sleeve ring (203).

4. The protective bottom plate structure of a lithium iron phosphate battery for a vehicle according to claim 3, characterized in that: The two ends of the spring (206) are movably abutted against the bottom plate body (1) and the sleeve ring (203) respectively, and an embedded tube (207) is fixedly embedded inside the hollow tube (201).

5. The protective bottom plate structure of a lithium iron phosphate battery for a vehicle according to claim 4, characterized in that: The space between the embedded tube (207) and the hollow tube (201) and the interior of the embedded tube (207) are filled with filling cotton (208).

6. The protective bottom plate structure of a lithium iron phosphate battery for a vehicle according to claim 1, characterized in that: The hollow tube (201) is rotatably connected to the collar (203) via the connecting shaft (202), and the cross-sectional shape of the hollow tube (201) is annular.

7. The protective bottom plate structure of a lithium iron phosphate battery for a vehicle according to claim 5, characterized in that: The cross-sectional shape of the embedded tube (207) is triangular, the length of the embedded tube (207) is equal to the length of the filling cotton (208), and a buffer pad (3) is fixedly installed at the bottom of the base plate body (1).

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