New energy automobile power battery protection device

Abstract

The utility model provides a new energy automobile power battery protection device, which relates to the technical field of new energy automobiles and comprises a bottom plate, a buffer layer, a cover plate and a heat dissipation layer which are sequentially stacked and fixed from bottom to top, the buffer layer is of a concave angle negative Poisson's ratio structure and is composed of concave angle cells, each concave angle cell is formed by connecting two isosceles trapezoid cavities which are vertically symmetrical, concave angles are formed in the two sides of each concave angle cell, the concave angle cells are arranged in multiple rows and multiple columns, the concave angle cells in each row are arranged at intervals one by one, and the concave angle cells in each column are continuously arranged and sequentially connected. And the two adjacent rows of concave corner cells are staggered in the vertical direction, so that in any three continuous rows of concave corner cells, each concave corner cell of the middle row of concave corner cells is embedded among four adjacent concave corner cells of the two rows of concave corner cells on the two sides. The anti-collision heat dissipation device has the advantages of being small in overall occupied space, simple in structure, easy to disassemble and capable of achieving anti-collision and heat dissipation performance under the condition that the occupied space is small.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile technical field especially relates to a new energy automobile power battery protection device. BACKGROUND

[0002] At present, the new energy automobile power battery protection device is generally divided into two categories: anti-collision device and heat dissipation device. The common structure of the anti-collision device includes a box body, a buffer spring, a hydraulic system, a damping magnetic sheet, a gear structure and an airbag, etc. The heat dissipation device mainly achieves the heat dissipation purpose through air cooling and water cooling. These devices are usually installed inside the automobile, which not only occupies a large space, but also has a complex design, a complicated structure and a high disassembly difficulty, bringing many inconveniences to the subsequent replacement work. For example, the anti-collision new energy automobile battery protection device disclosed in Chinese invention patent application CN 112599906 A is symmetrically provided with a bottom plate and a top plate, four protective plates are arranged between the bottom plate and the top plate, and a telescopic protective box is arranged on the inner side of the protective plate. Each protective plate is composed of a lower plate, an upper plate and a middle plate, and the parts are connected through hinges and are provided with telescopic rods and springs. Although the protection of the battery is achieved, the design is extremely complex. For another example, in the new energy automobile battery heat dissipation device disclosed in Chinese utility model patent application CN 214176111 U, a battery protection shell is arranged, a filter plate is arranged in the shell, a battery is fixed on the filter plate, a heat dissipation flap is arranged on the outer wall of the battery, a heat conduction layer is arranged on the outer wall of the heat dissipation flap, a condenser pipe is arranged around the heat conduction layer, a refrigeration tank is further arranged on the filter plate, and a refrigeration device and a circulating water pump are arranged in the tank. Only the battery heat dissipation can be achieved.

[0003] In summary, the existing new energy automobile power battery protection device has a single function and cannot simultaneously achieve the anti-collision and heat dissipation of the new energy automobile power battery. Therefore, it is of great significance to develop a new energy automobile power battery protection device with excellent anti-collision performance, small space occupation and heat dissipation function. UTILITY MODEL CONTENTS

[0004] Therefore, in order to solve the problem that the new energy automobile power battery cannot simultaneously achieve the anti-collision and heat dissipation under the condition of small space occupation, the embodiments of the utility model provide a new energy automobile power battery protection device.

[0005] The embodiments of the utility model provide a new energy automobile power battery protection device, which comprises a bottom plate, a buffer layer, a cover plate and a heat dissipation layer which are sequentially stacked and fixed from bottom to top.

[0006] The buffer layer is an inner recess angle negative Poisson's ratio structure, the inner recess angle negative Poisson's ratio structure is composed of inner recess angle cells, the inner recess angle cells are two isosceles trapezoidal cavities connected symmetrically upwards and downwards to form inner recess angles on both sides, the inner recess angle cells are arranged in multiple rows and multiple columns, the inner recess angle cells in each row are arranged at intervals, the inner recess angle cells in each column are arranged continuously and connected in sequence, and the inner recess angle cells in two adjacent rows are staggered in the vertical direction, so that in any three continuous rows of the inner recess angle cells, each inner recess angle cell in the middle row is embedded between four adjacent inner recess angle cells in the two rows on the sides.

[0007] Further, the inner recess angle cell includes an upper cavity and a lower cavity which are both isosceles trapezoids, the width of the upper cavity and the lower cavity gradually decreases from the sides to the middle, in any three continuous rows of the inner recess angle cells, the upper cavity of the inner recess angle cell in the middle row is embedded between two adjacent lower cavities of the inner recess angle cell in the row above, and the lower cavity of the inner recess angle cell in the middle row is embedded between two adjacent upper cavities of the inner recess angle cell in the row below.

[0008] Further, the buffer layer is integrally formed by 3D printing.

[0009] Further, the material of the buffer layer is magnesium-aluminum alloy, and the materials of the bottom plate and the cover plate are both aluminum alloy.

[0010] Further, the upper surface of the bottom plate is provided with a receiving groove, the buffer layer is embedded in the receiving groove, and the cover plate covers the receiving groove.

[0011] Further, the edge of the bottom plate is provided with a plurality of mounting seats, the edge of the cover plate is provided with a plurality of connecting ears, the mounting seats and the connecting ears coincide one by one, and the mounting seats are used for connecting the automobile chassis.

[0012] Further, the lower surface of the bottom plate is provided with a honeycomb-shaped reinforcing rib.

[0013] Further, the bottom plate, the buffer layer and the cover plate are bonded by an adhesive, and the cover plate and the heat dissipation layer are connected by a heat-conducting adhesive.

[0014] Further, the heat dissipation layer includes a plurality of thermoelectric sheets, each thermoelectric sheet covers the upper surface of the cover plate, and each thermoelectric sheet is connected by a flexible wire.

[0015] Further, the heat dissipation layer is a thermoelectric material.

[0016] The technical scheme provided by the embodiment of the utility model has the beneficial effects that:

[0017] 1. The utility model discloses a new energy automobile power battery protection device, the buffer layer adopts the recessed corner negative Poisson's ratio structure design, compact structure has higher strength and rigidity and more excellent energy absorption performance to guarantee the anti -collision performance of power battery, prevents the power battery from being damaged when the car collides, through being equipped with the heat dissipation layer on the cover plate surface, satisfies the heat dissipation need of power battery, places the heat dissipation layer at the outside of power battery, and the device whole occupies the small space, simple structure, convenient to use, easy to detach, under the condition of small space occupation, the anti -collision and heat dissipation performance are given full play to.

[0018] 2. The utility model discloses a new energy automobile power battery protection device, the buffer layer adopts the recessed corner negative Poisson's ratio structure, and the recessed corner negative Poisson's ratio structure is composed of the recessed corner cell, compared with the traditional honeycomb negative Poisson's ratio structure, when being impacted, the negative Poisson's ratio structure will rotate or move in the opposite direction, causes the shrinkage of material in the direction perpendicular to the compressive stress, so as to be crushed, absorbs stress, thereby playing the role of stronger protection battery.

[0019] 3. The utility model discloses a new energy automobile power battery protection device, and the heat dissipation layer adopts the thermoelectric material, heats the power battery when the new energy automobile starts, makes the power battery keep the proper temperature range, so as to respond to the low temperature environment, and the excessive heat generated by the power battery is conducted out subsequently, prevents the power battery from overheating, improves the safety of the power battery whole. DRAWINGS

[0020] Figure 1 It is the schematic diagram of the utility model discloses a new energy automobile power battery protection device;

[0021] Figure 2 It is the utility model discloses a new energy automobile power battery protection device's explosion map;

[0022] Figure 3 It is the upper surface schematic diagram of bottom plate;

[0023] Figure 4 It is the lower surface schematic diagram of bottom plate;

[0024] Figure 5 It is the schematic diagram of buffer layer;

[0025] Figure 6 It is the schematic diagram of recessed corner cell;

[0026] Figure 7 It is the array schematic diagram of recessed corner cell;

[0027] Figure 8 It is the schematic diagram of cover plate.

[0028] In the figure: 1, the bottom plate; 101, the accommodation groove; 102, the mounting seat; 103, the bolt hole; 104, the reinforcing rib; 2, the buffer layer; 201, the inner concave corner cell; 202, the upper cavity; 203, the lower cavity; 204, the inner concave corner; 3, the cover plate; 301, the connecting lug. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model embodiments will be further described below in combination with the drawings. The following is a relatively preferred one of the plurality of possible embodiments of the utility model, which is intended to provide a basic understanding of the utility model, but is not intended to confirm the key or decisive elements or limit the scope of protection.

[0030] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of example embodiments can have different values.

[0031] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as if the techniques, methods, and apparatus were discussed in detail herein, where appropriate.

[0032] It should be noted that like reference numerals and letters refer to like items in the several views of the drawings, and as such, definitions of those items in one view are deemed to be incorporated in the definitions in the other views. It is to be understood that the drawings are not necessarily to scale.

[0033] It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" should be interpreted broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] Please refer to Figure 1 and 2 The embodiment of the utility model provides a new energy automobile power battery protection device, including from bottom to top fixedly stacked bottom plate 1, buffer layer 2, cover plate 3 and heat dissipation layer (not shown in the figure).

[0035] Among them, the bottom plate 1 is arranged at the bottom of the automobile and is used for directly receiving external collision. The bottom plate 1 generally adopts high-strength aluminum alloy material and has good impact resistance.

[0036] As Figure 5and 6 As shown, the buffer layer 2 plays a major role in resisting external impact, and the inner concave angle negative Poisson's ratio structure can effectively absorb impact and vibration energy while ensuring lightweight. Specifically, the inner concave angle negative Poisson's ratio structure is composed of inner concave angle cells 201, which are two isosceles trapezoidal cavities connected symmetrically up and down to form inner concave angles 204 on both sides. Each inner concave angle cell 201 is arranged in multiple rows and columns, with each row of inner concave angle cells 201 spaced apart, and each column of inner concave angle cells 201 continuously arranged and connected in turn. The adjacent two rows of inner concave angle cells 201 are staggered in the vertical direction, so that in any three consecutive rows of inner concave angle cells 201, each inner concave angle cell 201 in the middle row is embedded between the adjacent four inner concave angle cells 201 in the two rows on both sides.

[0037] As shown, Figure 7 In this embodiment, the inner concave angle cell 201 includes an upper cavity 202 and a lower cavity 203, both of which are isosceles trapezoidal. The width gradually decreases from both sides to the middle, and in any three consecutive rows of inner concave angle cells 201, the upper cavity 202 of the inner concave angle cell 201 in the middle row is embedded between the adjacent two lower cavities 203 of the inner concave angle cell 201 in the row above, and the lower cavity 203 of the inner concave angle cell 201 in the middle row is embedded between the adjacent two upper cavities 202 of the inner concave angle cell 201 in the row below. In this way, the inner concave angle cell 201 forms a complete inner concave angle negative Poisson's ratio structure in an array.

[0038] It should be noted that although the inner concave angle negative Poisson's ratio structure in this embodiment is composed of only three rows of inner concave angle cells 201, in other embodiments, the number of rows of inner concave angle cells 201 can be set to more as needed for actual application. Similarly, the number of columns of inner concave angle cells 201 can also be flexibly set according to actual application needs.

[0039] When the buffer layer 2 is impacted, the inner concave angle negative Poisson's ratio structure rotates or moves in the opposite direction, causing the inner concave angle cells 201 to shrink in the direction perpendicular to the compressive stress, and even collapse, absorbing stress, thereby protecting the power battery. Compared with the traditional honeycomb negative Poisson's ratio structure, it has higher strength and stiffness, as well as more excellent energy absorption performance.

[0040] The buffer layer 2 can be integrally formed by 3D printing, so as to ensure higher structural strength. In this embodiment, the material of the buffer layer 2 is magnesium-aluminum alloy, which has low density, excellent casting performance, good thermal conductivity and corrosion resistance, and can effectively absorb impact and vibration energy while ensuring the lightweight of the buffer layer 2.

[0041] As shown in Figure 3 and 8 The cover plate 3 is used to arrange the heat dissipation layer. In this embodiment, the upper surface of the bottom plate 1 is provided with a receiving groove 101, and the buffer layer 2 is embedded in the receiving groove 101. The edge of the bottom plate 1 is wider than the power battery, and together with the buffer layer 2, it forms a crushing space to facilitate the crushing after being hit. The cover plate 3 covers the receiving groove 101, and the heat dissipation layer is arranged on the upper surface of the cover plate 3, so that the upper surface of the heat dissipation layer can be directly in contact with the power battery. The cover plate 3 is generally made of aluminum alloy material, which can play a good heat conduction effect.

[0042] The heat dissipation layer is made of thermoelectric material. Thermoelectric material has the function of converting electrical energy and heat energy under the action of electric field and temperature gradient. The selection of thermoelectric material includes but is not limited to bismuth telluride (Bi2Te3), lead telluride (PbTe) and silicon-germanium alloy (SiGe), etc. The heat dissipation layer heats the power battery when the new energy vehicle starts, maintains a suitable temperature range, and then conducts the excess heat generated when the power battery works normally. Realize heat dissipation, prevent battery overheating, and improve the overall safety of the battery.

[0043] In this embodiment, the heat dissipation layer includes a plurality of thermoelectric sheets, each of which covers the upper surface of the cover plate 3, ensuring that there is no air gap between the thermoelectric sheets and the aluminum alloy plate to enhance the heat conduction efficiency. Each of the thermoelectric sheets is connected by a flexible wire for current transmission. In actual application, a temperature sensor can also be installed near the thermoelectric sheet to monitor the temperature of the power battery unit in real time, so as to adjust the current size of the thermoelectric sheet according to the temperature of the power battery unit to realize heating or heat dissipation.

[0044] In addition, the bottom plate 1, the buffer layer 2 and the cover plate 3 are bonded by an adhesive to stably connect the bottom plate 1, the buffer layer 2 and the cover plate 3. The cover plate 3 and the heat dissipation layer are connected by a heat-conducting adhesive to ensure good thermal conductivity.

[0045] The new energy automobile power battery protection device can be directly installed on the chassis of the new energy automobile, below the power battery.

[0046] Considering that the lower surface of the bottom plate 1 is exposed, it will be directly subjected to collision. Figure 4 As shown in the figure, the lower surface of the bottom plate 1 is provided with honeycomb-shaped reinforcing ribs 104, which can reduce the weight, disperse and resist external force, improve the strength and rigidity of the bottom, and better maintain the integrity and stability of the bottom plate 1.

[0047] The new energy automobile power battery protection device of the utility model is applied to the new energy automobile, and when the automobile is subjected to collision, the bottom plate 1 first resists the impact, the buffer layer 2 further absorbs the energy generated by the impact, and the heat dissipation layer first heats the power battery when the new energy automobile starts, maintains a suitable temperature range, and then conducts the excessive heat generated by the power battery to dissipate heat when the power battery normally works. In this way, the new energy automobile power battery protection device of the utility model is installed below the chassis of the automobile, has the advantages of simple structure, convenient disassembly, and collision prevention, heating and heat dissipation functions. The service life of the power battery is prolonged, the failure rate is reduced, and the overall performance and user satisfaction of the new energy automobile are improved.

[0048] In this paper, the front, back, up, down and other orientation words are defined by the position of the parts in the drawing and the position of the parts relative to each other in the drawing, only to express the clear and convenient technical scheme. It should be understood that they are relative concepts, which can be changed accordingly according to different ways of use and placement, and the use of the orientation words should not limit the scope of the application.

[0049] In the case of no conflict, the above-mentioned embodiments and features in the embodiments can be combined with each other. The above-mentioned only for the preferred embodiments of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A new energy vehicle power battery protection device, characterized in that, The bottom plate, the buffer layer, the cover plate and the heat dissipation layer are sequentially stacked from bottom to top. The buffer layer is an inner concave angle negative Poisson's ratio structure composed of inner concave angle cells, each of which is a two-equal-wedge trapezoidal cavity connected symmetrically up and down to form an inner concave angle on both sides.

2. The new energy vehicle power battery protection device according to claim 1, characterized in that: Each of the inner concave angle cells is arranged in multiple rows and columns, each row of the inner concave angle cells is arranged at intervals, each column of the inner concave angle cells is arranged continuously and connected in sequence, and adjacent two rows of the inner concave angle cells are staggered in the vertical direction, so that in any three continuous rows of the inner concave angle cells, each of the inner concave angle cells in the middle row is embedded between the adjacent four inner concave angle cells in the two rows on both sides.

3. The new energy vehicle power battery protection device according to claim 1, characterized in that: The inner concave angle cell includes an upper cavity and a lower cavity, both of which are isosceles trapezoidal, and the width gradually decreases from both sides to the middle.

4. The new energy vehicle power battery protection device according to claim 1, characterized in that: In any three continuous rows of the inner concave angle cells, the upper cavity of the inner concave angle cell in the middle row is embedded between the adjacent two lower cavities of the inner concave angle cell in the row above, and the lower cavity of the inner concave angle cell in the middle row is embedded between the adjacent two upper cavities of the inner concave angle cell in the row below.

5. The new energy vehicle power battery protection device according to claim 1, characterized in that: The buffer layer is integrally formed by 3D printing.

6. The new energy vehicle power battery protection device according to claim 1, characterized in that: The material of the buffer layer is magnesium-aluminum alloy, and the materials of the bottom plate and the cover plate are both aluminum alloy.

7. The new energy vehicle power battery protection device according to claim 1, characterized in that: The upper surface of the bottom plate is provided with a receiving groove, the buffer layer is embedded in the receiving groove, and the cover plate covers the receiving groove.

8. The new energy vehicle power battery protection device according to claim 1, characterized in that: The edge of the bottom plate is provided with a plurality of mounting seats, the edge of the cover plate is provided with a plurality of connecting ears, the mounting seats and the connecting ears coincide one by one, and the mounting seats are used to connect the automobile chassis.

9. The new energy vehicle power battery protection device according to claim 1, characterized in that: The lower surface of the bottom plate is provided with a honeycomb-shaped reinforcing rib.

10. The new energy vehicle power battery protection device according to claim 1, characterized in that: The bottom plate, the buffer layer and the cover plate are bonded by an adhesive, and the cover plate and the heat dissipation layer are connected by a heat-conducting adhesive. The heat dissipation layer includes a plurality of thermoelectric sheets, each of which covers the upper surface of the cover plate, and each of the thermoelectric sheets is connected by a flexible wire. The heat dissipation layer is a thermoelectric material.

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