Bottom protection plate structure of power battery pack

Abstract

The utility model belongs to the technical field of battery pack bottom protection plates, and particularly relates to a power battery pack bottom protection plate structure which comprises an upper plate body, an upper plate body and a lower plate body, a plurality of connecting convex points are formed on the upper plate body and the lower plate body in a pressure welding mode, and a plurality of positioning convex blocks which are matched and connected with buffering energy absorption assemblies in a clamping mode are arranged on the upper plate body and the lower plate body. The buffer energy absorption assembly comprises two supporting plates, the two supporting plates are connected with the two ends of a spring plate respectively, the spring plate is of an elastic V-shaped plate structure, and a rubber damping block is arranged between the two supporting plates in a plugged mode. The upper plate body and the lower plate body are stably pressed and welded into a whole for use through the connecting convex points, and when the lower plate body is impacted by soil and broken stones, the spring plate and the rubber damping block generate elastic deformation at the same time, so that the effects of buffering, damping and energy absorption are achieved, a battery pack above the upper plate body is prevented from being influenced by impact force, and the battery pack is effectively protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery pack bottom guard plates, and in particular relates to a power battery pack bottom guard plate structure. Background Art

[0002] For electric vehicles with longer driving range, the battery pack is generally designed into a special shape and placed under the vehicle to fill the available space in the chassis and meet thermal safety requirements. As the core power component of electric vehicles, the structural safety of the power battery pack is an important factor affecting the safety factor of the entire vehicle.

[0003] In the existing battery pack structure, the bottom guard plate of the battery pack box is usually composed of an ordinary sheet metal structure, and there is no special reinforcement structure, which leads to low structural strength of the bottom guard plate of the battery pack and poor anti-knock ability of the bottom guard plate, and it is unable to effectively provide reliable and effective protection for the internal modules of the battery pack, especially under complex road conditions: when the ground soil and gravel are thrown to the bottom guard plate of the battery pack under the drive of the wheels, the high-frequency knocking may still cause the active materials in the lithium battery to peel off or be damaged, thereby reducing the capacity of the battery and affecting its performance. Especially inside the battery, high-frequency knocking may cause damage to the diaphragm between the electrolyte and the electrode, resulting in interference with the electrochemical reaction. Therefore, there is an urgent need for a power battery pack bottom guard plate structure that can effectively buffer and absorb the high-frequency impact of soil and gravel on the power battery pack when the vehicle is driving on muddy and gravel roads, so as to achieve safe protection of the power battery pack. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a bottom guard plate structure for a power battery pack to solve the problem that the existing bottom guard plate of the battery pack has low structural strength and no buffering capacity, and cannot effectively buffer and absorb the high-frequency impact force of mud and gravel on the power battery pack when the vehicle is driving on mud and gravel roads.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a bottom guard plate structure of a power battery pack, including an upper plate body, the upper plate body and the lower plate body, the upper plate body and the lower plate body are press-welded with a plurality of connecting protrusions, the upper plate body and the lower plate body are provided with a plurality of positioning protrusions adapted to snap-in buffer energy absorption components, the buffer energy absorption component includes a support plate, the number of the support plates is two and they are respectively connected to the two ends of a spring plate, the spring plate is an elastic V-shaped plate structure, and a rubber damping block is inserted between the two support plates.

[0006] The beneficial effects of the utility model are as follows: the upper plate body and the lower plate body are stably press-welded into one body for use through connecting protrusions; when the lower plate body is impacted by mud or gravel, the spring plate and the rubber damping block simultaneously produce elastic deformation, thereby achieving the effect of buffering, shock absorption and energy absorption, preventing the battery pack above the upper plate body from being affected by the impact force, and effectively protecting the battery pack.

[0007] In order to prevent the buffer energy absorption component from shaking between the upper plate and the lower plate;

[0008] As a further improvement of the above technical solution: a positioning hole is opened on the support plate, and the positioning hole is adapted to be mounted on the outside of the positioning protrusion, and the positioning protrusion is protruded on two facing surfaces of the upper plate body and the lower plate body.

[0009] The beneficial effect of this improvement is that the buffer energy absorption component can be limited by the protruding positioning bumps to avoid shaking inside the upper plate body and the lower plate body, thereby playing a stable shock absorption and energy absorption protection role.

[0010] In order to make the buffer energy absorption component stably absorb the impact force transmitted by the lower plate;

[0011] As a further improvement of the above technical solution: the upper and lower end surfaces of the rubber damping block are evenly connected to the end surface of the positioning protrusion, and the upper and lower end surfaces of the support plate are evenly connected to the inner walls of the upper plate body and the lower plate body.

[0012] The beneficial effect of this improvement is that when the buffer energy-absorbing component absorbs and transmits the impact kinetic energy of the lower plate body, it is stably limited and supported by the upper plate body and the lower plate body in the up and down directions, thereby maintaining the stability of the installation.

[0013] In order to ensure the balance of the spring plate force support;

[0014] As a further improvement of the above technical solution: the number of the spring plates is multiple, and they are arranged at equal intervals around the axis of the support plate and the positioning hole.

[0015] The beneficial effect of this improvement is that the multiple spring plates arranged at equal intervals around the support plate can be stably stressed, thereby ensuring the stability of the support of the buffer energy absorption component.

[0016] In order to effectively protect the battery pack installed on the upper plate by using the buffer energy absorption component;

[0017] As a further improvement of the above technical solution: there are multiple buffer energy absorption components, and they are evenly distributed between the upper plate body and the lower plate body.

[0018] The beneficial effect of this improvement is that the multiple buffer energy-absorbing components arranged evenly can effectively absorb the impact kinetic energy from below, thereby achieving reliable protection for the battery pack installed on the upper plate.

[0019] In order to ensure the stability of the connection between the upper plate and the lower plate;

[0020] As a further improvement of the above technical solution: the number of the connecting bumps is multiple and evenly distributed on the upper plate body and the lower plate body.

[0021] The beneficial effect of this improvement is that the evenly arranged multiple connection protrusions can effectively ensure the stability of the connection between the upper plate body and the lower plate body.

[0022] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 The cross-sectional structure of the utility model Figure 1 ;

[0025] Figure 3 The cross-sectional structure of the utility model Figure 2 ;

[0026] Figure 4 It is a structural schematic diagram of the buffer energy absorption component in the utility model;

[0027] Figure 5 It is an enlarged view of A in the utility model;

[0028] In the figure: 1, upper plate body; 2, lower plate body; 3, connecting protrusion; 4, positioning protrusion; 5, buffer energy absorption component; 51, support plate; 52, spring plate; 53, rubber damping block; 54, positioning hole. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0030] Embodiment 1:

[0031] like Figure 1—5: A power battery pack bottom guard plate structure, including an upper plate body 1, the upper plate body 1 and the lower plate body 2, the upper plate body 1 and the lower plate body 2 are press-welded with a plurality of connection protrusions 3, the upper plate body 1 and the lower plate body 2 are provided with a plurality of positioning protrusions 4 adapted to snap-in a buffer energy absorption component 5, the buffer energy absorption component 5 includes a support plate 51, the number of the support plates 51 is two and they are respectively connected to the two ends of a spring plate 52, the spring plate 52 is an elastic V-shaped plate structure, a rubber damping block 53 is inserted between the two support plates 51 ... The connecting protrusions 3 are stably pressed and welded together for use. When the lower plate 2 is impacted by soil or gravel, the spring plate 52 and the rubber damping block 53 simultaneously produce elastic deformation to achieve the effect of buffering, shock absorption and energy absorption, thereby preventing the battery pack above the upper plate 1 from being affected by the impact force and effectively protecting the battery pack. A positioning hole 54 is provided on the support plate 51. The positioning hole 54 is adapted to be mounted on the outer side of the positioning protrusion 4. The positioning protrusion 4 is protruded on the two facing surfaces of the upper plate 1 and the lower plate 2. The buffering energy absorption component 5 can be limited by the protruding positioning protrusion 4 to avoid the battery pack above the upper plate 1. The inside of the plate body 1 and the lower plate body 2 shakes, thereby playing a role of stable shock absorption and energy absorption protection. The upper and lower end surfaces of the rubber damping block 53 are connected to the end surface of the positioning protrusion 4 in a flat manner. The upper and lower end surfaces of the support plate 51 are connected to the inner walls of the upper plate body 1 and the lower plate body 2 in a flat manner. When the buffer energy absorption component 5 absorbs and transmits the impact kinetic energy of the lower plate body 2, it is stably limited and supported by the upper plate body 1 and the lower plate body 2 in the upper and lower directions to maintain the stability of the installation. The number of the spring plates 52 is multiple, and they are equidistantly spaced around the axis of the support plate 51 and the positioning hole 54, surrounding the support plate The multiple spring plates 52 equidistantly arranged at 51 can be stably stressed, thereby ensuring the stability of the support of the buffer energy absorption component 5. The number of the buffer energy absorption components 5 is multiple and evenly distributed between the upper plate body 1 and the lower plate body 2. The multiple evenly arranged buffer energy absorption components 5 can effectively absorb the impact kinetic energy from below, thereby achieving reliable protection for the battery pack installed on the upper plate body 1. The number of the connecting protrusions 3 is multiple and evenly distributed on the upper plate body 1 and the lower plate body 2. The multiple evenly arranged connecting protrusions 3 can effectively ensure the stability of the connection between the upper plate body 1 and the lower plate body 2.

[0032] The working principle of the present technical solution is as follows: the battery pack is installed above the upper plate body 1, and the fixing of the bottom guard plate can be achieved by bolt fixing and other methods in the prior art; when the vehicle is traveling on mud and gravel roads, the mud and gravel on the ground are thrown toward the bottom guard plate of the battery pack driven by the wheels, exerting an impact force on the lower plate body 2, and the lower plate body 2 applies the force to the buffer energy absorption component 5, and the support plate 51 in the buffer energy absorption component 5 drives the spring plate 52 to produce elastic deformation, and the rubber damping block 53 is elastically deformed after being squeezed, thereby achieving the effect of buffering energy absorption and shock reduction, effectively reducing the vibration amplitude of the upper plate body 1, thereby protecting the battery pack installed on the upper plate body 1.

[0033] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes 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 apparatus.

[0034] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A power battery pack bottom guard plate structure, characterized in that: The invention comprises an upper plate body (1), the upper plate body (1) and a lower plate body (2), a plurality of connection protrusions (3) are formed by pressure welding on the upper plate body (1) and the lower plate body (2), a plurality of positioning protrusions (4) adapted to snap-in a buffer energy absorption component (5) are provided on the upper plate body (1) and the lower plate body (2), the buffer energy absorption component (5) comprises a support plate (51), the number of the support plates (51) is two and they are respectively connected to the two ends of a spring plate (52), the spring plate (52) is a V-shaped plate structure with elasticity, and a rubber damping block (53) is inserted between the two support plates (51).

2. A power battery pack bottom guard plate structure according to claim 1, characterized in that: The support plate (51) is provided with a positioning hole (54), and the positioning hole (54) is adapted to be mounted on the outside of a positioning protrusion (4), and the positioning protrusion (4) is protruded on two facing surfaces of the upper plate body (1) and the lower plate body (2).

3. The power battery pack bottom guard plate structure according to claim 1, characterized in that: The upper and lower end surfaces of the rubber damping block (53) are evenly connected to the end surface of the positioning protrusion (4), and the upper and lower end surfaces of the support plate (51) are evenly connected to the inner walls of the upper plate body (1) and the lower plate body (2).

4. The power battery pack bottom guard plate structure according to claim 1, characterized in that: The number of the spring plates (52) is plural and they are arranged at equal intervals around the axis of the support plate (51) and the positioning hole (54).

5. The power battery pack bottom guard plate structure according to claim 1, characterized in that: The buffer energy absorption components (5) are multiple in number and are evenly distributed between the upper plate body (1) and the lower plate body (2).

6. The power battery pack bottom guard plate structure according to claim 1, characterized in that: The number of the connection protrusions (3) is multiple and evenly distributed on the upper plate body (1) and the lower plate body (2).

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