Heat preservation and protection mechanism for new energy automobile battery

Abstract

The utility model discloses a new energy automobile battery heat preservation protection mechanism which comprises a battery bottom plate, and the battery bottom plate is sequentially provided with a composite heat insulation layer and a protection plate from top to bottom. The composite heat insulation layer comprises an infrared reflection film, a heat preservation plate and a waterproof protection film which are sequentially bonded and fixed from top to bottom, and the protection plate and the battery bottom plate are bolted through a fastener so as to fix the composite heat insulation layer between the protection plate and the battery bottom plate. Through the composite heat insulation layer arranged below the battery bottom plate, the self-generated heat of the battery and the heat loss of a heat management system in severe cold weather are reduced, the use temperature of the battery is improved, and the cruising ability is increased; the height of the fastener serves as an installation gap of the composite heat insulation layer, the fastener is matched with an original battery protection plate of a new energy automobile battery, only the corresponding thickness is increased, installation of the original protection plate is not affected, and the heat preservation and heat insulation performance of the automobile battery is improved. And different grades of thermal insulation performance can be obtained by selecting the thermal insulation plates made of different materials.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicle battery protection, and more specifically to a new energy vehicle battery heat preservation and protection mechanism. Background Art

[0002] With the development of new energy vehicles, more and more pure electric and hybrid new energy vehicles have entered thousands of households, and the winter endurance of new energy vehicles, especially pure electric vehicles, has attracted more and more attention. In areas with cold temperatures in winter, the temperature will drop below the suitable operating temperature of lithium batteries. The performance of lithium batteries will drop sharply. Many new energy vehicles use the battery pack's own electrical energy to heat the battery to ensure good discharge characteristics. The heating device is generally installed at the bottom of the battery. In the process of heating the battery pack, part of the heat is also dissipated through the bottom plate.

[0003] When new energy vehicles are driving in severe cold weather, the battery floor is exposed to high-speed airflow, and the battery's spontaneous heat and the heat from the heating system are dissipated through the battery floor. The battery thermal management system will consume more heat to maintain the battery's optimal operating temperature.

[0004] The new energy vehicle battery protection plate with thermal insulation function is a type of product that can block the heat loss of new energy vehicle batteries in severe cold weather. It reduces the heat loss of the battery thermal management system and the battery pack itself, increases the battery operating temperature in a low temperature environment, and increases battery life. The new energy vehicle battery thermal insulation protection pad has a certain thickness and rigidity, and will deform when encountering bumps to protect the battery from a certain degree of bumps.

[0005] The new energy vehicle battery protection products currently on the market are very mature. They are generally a hard base plate made of high-strength materials, but they do not have thermal insulation function.

[0006] Therefore, how to provide a new energy vehicle battery insulation and protection mechanism that is easy to install, adapts to market demand, and has integrated battery insulation and protection functions is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0007] In view of this, the utility model provides a new energy vehicle battery insulation and protection mechanism, which has insulation and protection functions and has obvious insulation performance under severe cold weather conditions. At the same time, it can effectively protect the new energy vehicle battery from damage when scratches occur on the bottom of the car.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A new energy vehicle battery thermal insulation protection mechanism, comprising a battery bottom plate,

[0010] The bottom surface of the battery bottom plate is provided with a composite heat insulation layer and a protective plate in sequence from top to bottom;

[0011] The composite heat insulation layer includes an infrared reflective film, a heat preservation board and a waterproof protective film bonded in sequence from top to bottom, and the protective plate and the battery bottom plate are bolted together by fasteners to fix the composite heat insulation layer between the protective plate and the battery bottom plate.

[0012] The beneficial effects of the above technical solution are that the infrared reflective film can reflect infrared, the thermal insulation board can reduce the self-generated heat of the battery and the heat loss of the thermal management system in severe cold weather, increase the operating temperature of the battery, thereby reducing energy consumption and increasing the endurance of new energy vehicles, and the protective plate can ensure that the car battery is not damaged after the car chassis is scratched.

[0013] Preferably, the infrared reflective film and the waterproof protective film completely cover the top and bottom surfaces of the insulation board respectively. The infrared reflective film and the waterproof protective film completely cover the top and bottom surfaces of the insulation board to form a heat-insulating layer to improve the heat preservation performance of the battery.

[0014] Preferably, the panel of the protective plate is provided with bolt holes corresponding to the mounting holes on the panel of the battery bottom plate, the fastener is provided with through holes corresponding to the bolt holes, and the bolts penetrate the bolt holes, the through holes and the mounting holes in order from bottom to top to fasten the protective plate, the fastener and the battery bottom plate. The protective plate is connected to the battery bottom plate by bolts, which is convenient for installation and removal, and is convenient for replacement and maintenance of new energy vehicle batteries.

[0015] Preferably, the fastener is one or a combination of a fastening seat and a fastening strip, the outer circumference of the composite heat insulation layer is smaller than the size of the protective plate, and a plurality of the fasteners are arranged on the circumference of the composite heat insulation layer. The protective plate is connected to the battery bottom plate by fasteners, and the fasteners are arranged on the circumference of the composite heat insulation layer. The size of the original automobile battery is not changed, only the thickness under the battery bottom plate is increased, and the installation of the protective plate is not affected. At the same time, the automobile battery also has heat preservation and heat insulation performance through the composite heat insulation layer, which is adapted to the original battery installation structure.

[0016] Preferably, when the fastener is a fastening seat, it is a round seat or a square seat, and a through hole corresponding to the mounting hole and the threaded hole is provided on the fastening seat. The fastening seat is in a small block shape, and its height is the installation gap of the composite thermal insulation layer. The thickness of the composite thermal insulation layer can be adapted by adjusting the height of the fastening seat. A through hole is provided on the fastening seat, and the protective plate, the fastening seat and the battery bottom plate are fastened by bolts.

[0017] Preferably, when the fastener is a fastening strip, a through hole corresponding to the mounting hole and the threaded hole is provided on the panel of the fastening strip. The fastening strip is in the shape of a strip, and a through hole is provided on its surface. The protective plate, the fastening strip and the battery bottom plate are fastened by bolts. The thickness of the fastening strip is the installation gap of the composite thermal insulation layer.

[0018] Preferably, the height of the fastener is the same as the thickness of the composite insulation layer. The composite insulation layer is embedded between the protective plate and the battery bottom plate, and the installation gap of the composite insulation layer can be adjusted by adjusting the height of the fastener to ensure that the composite insulation layer is completely embedded between the protective plate and the battery bottom plate and there is no gap between the three.

[0019] Preferably, the insulation board is manufactured in an integrated manner or is formed by splicing multiple insulation modules, and the insulation board is one of an aerogel board, a vacuum insulation board, a foamed polyurethane board, an extruded polystyrene board or a graphite polystyrene board, and has a thickness of 5 to 10 mm. By selecting different materials, different levels of insulation performance can be obtained. The thickest insulation board is 10 mm, which only increases the thickness between the battery protection board and the battery bottom plate, but does not affect the installation of the protection board and the battery assembly inside the car.

[0020] Preferably, when the insulation board is formed by splicing multiple insulation modules, the joints between the multiple insulation modules are bonded and fixed by aluminum foil tape, and the multiple insulation modules are provided with through holes corresponding to the mounting holes. When a mounting hole is provided in the middle of the battery bottom plate, the insulation board is formed by splicing multiple insulation templates, and the insulation module is provided with a through hole corresponding to the mounting hole in the middle of the battery bottom plate, so as to facilitate the fasteners to connect the battery bottom plate and the protective plate.

[0021] Preferably, the infrared reflective film, the heat-insulating plate and the waterproof protective film are bonded and fixed to each other by double-sided adhesive tape, which is low in cost and simple and convenient to operate.

[0022] It can be seen from the above technical scheme that compared with the prior art, the utility model discloses a new energy vehicle battery thermal insulation protection mechanism, which reduces the battery's self-generated heat and heat loss of the thermal management system in severe cold weather through a composite insulation layer arranged under the battery bottom plate, thereby increasing the battery's operating temperature, thereby reducing energy consumption and increasing corresponding battery life; the height of the fastener serves as the installation gap of the composite insulation layer, which is adapted to the original battery protection plate of the new energy vehicle battery, only increasing the corresponding thickness without affecting the installation of the original protection plate, and adding a composite insulation layer to improve the thermal insulation performance of the vehicle battery; by selecting insulation boards of different materials, different levels of thermal insulation performance can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 A cross-sectional view of the heat preservation and protection mechanism provided by the utility model;

[0025] Figure 2 A schematic diagram of a cross-sectional exploded view of a heat preservation and protection mechanism provided by the utility model;

[0026] Figure 3 A schematic diagram of the structure of the heat preservation and protection mechanism provided by the utility model;

[0027] Figure 4 A schematic diagram of the arrangement of the fastening seat provided by the utility model;

[0028] Figure 5 A schematic diagram of the arrangement of the fastening strips provided by the utility model;

[0029] Figure 6 A schematic diagram of splicing multiple thermal insulation modules provided by the utility model.

[0030] in,

[0031] 1-battery bottom plate; 2-composite thermal insulation layer; 21-infrared reflective film; 22-insulation board; 23-waterproof protective film; 24-double-sided tape; 3-fasteners; 4-protective plate; 5-bolts. DETAILED DESCRIPTION

[0032] 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. Example 1

[0033] See attached Figure 1 ~ 3. The utility model embodiment discloses a new energy vehicle battery heat preservation and protection mechanism, including a battery bottom plate 1,

[0034] The bottom surface of the battery bottom plate 1 is provided with a composite heat insulation layer 2 and a protective plate 4 in sequence from top to bottom;

[0035] Among them, the composite insulation layer 2 includes an infrared reflective film 21, a thermal insulation board 22 and a waterproof protective film 23 bonded in sequence from top to bottom, and the protective plate 4 and the battery base plate 1 are bolted together by fasteners 3 to fix the composite insulation layer 2 between the protective plate 4 and the battery base plate 1.

[0036] The protective plate and the battery bottom plate are fixed by fasteners, and the composite insulation layer is embedded between the protective plate and the battery bottom plate. The structure of the original protective bottom plate of the new energy vehicle battery is not changed. The thermal insulation performance of the electric vehicle is given by only increasing its thickness. The structure is simple and easy to install.

[0037] In order to further optimize the above technical solution, the waterproof protective film 23 is a metal, rubber or plastic film.

[0038] In order to further optimize the above technical solution and ensure the thermal insulation effect of the composite thermal insulation layer, the infrared reflective film 21 and the waterproof protective film 23 completely cover the top and bottom surfaces of the thermal insulation board 22 respectively.

[0039] In order to further optimize the above technical solution, the panel of the protective plate 4 is provided with bolt holes corresponding to the mounting holes on the panel of the battery bottom plate 1, the fastener 3 is provided with through holes corresponding to the bolt holes, and the bolts 5 pass through the bolt holes, through holes and mounting holes from bottom to top in sequence to fasten the protective plate 4, the fastener 3 and the battery bottom plate 1. The bolt connection method is convenient for installation and disassembly, and is convenient for replacement and maintenance of new energy vehicle batteries.

[0040] In order to further optimize the above technical solution, the fastener 3 is a fastening seat, a fastening strip, or a combination of both. The outer peripheral size of the composite insulation layer 2 is smaller than the size of the protective plate 4, and multiple fasteners 3 are arranged on the peripheral side of the composite insulation layer 2.

[0041] In order to further optimize the above technical solution, the height of the fastener 3 is the same as the thickness of the composite thermal insulation layer 2 .

[0042] In order to further optimize the above technical solution, the fastener 3 is made of metal, rubber or plastic.

[0043] The fasteners are on the peripheral side between the battery bottom plate and the protective plate, the composite insulation layer is arranged between the battery bottom plate and the protective plate, the fasteners are surrounded by the peripheral side of the composite insulation layer, and the height of the fasteners is the interlocking gap of the composite insulation layer.

[0044] In order to further optimize the above technical solution, the insulation board 22 is an integrated finalized manufacturing or is spliced ​​by multiple insulation modules. The insulation board 22 is one of aerogel board, vacuum insulation board, foamed polyurethane board, extruded polystyrene board or graphite polystyrene board, and the thickness is 5 ~ 10mm. Different grades of thermal insulation performance can be obtained by selecting different materials. The thickness of the insulation board can be 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm or 10mm. According to the installation space of the new energy vehicle battery, insulation boards of different thicknesses are selected to ensure that only the installation thickness of the new energy vehicle battery is increased without changing its original installation structure.

[0045] In this embodiment, the insulation board is an integrated and standardized insulation board with a thickness of 10 mm.

[0046] In order to further optimize the above technical solution and ensure the bonding effect of the composite heat insulation layer, the infrared reflective film 21, the heat insulation board 22 and the waterproof protective film 23 are bonded and fixed to each other by double-sided adhesive 24.

[0047] When installing the thermal insulation protection mechanism, after the composite insulation layer is bonded, the fasteners are first fastened to the protection plate by bolts. The composite insulation layer is placed in a space surrounded by multiple fasteners. The car is lifted up by a lift for operation. The overall structure formed by the protection plate, composite insulation layer and fasteners is docked with the battery bottom plate. The fasteners correspond to the bolt holes of the battery bottom plate. The bolts are tightened to complete the installation. Example 2

[0048] See attached Figure 1 ~ 4, the utility model embodiment discloses a new energy vehicle battery insulation protection mechanism, which is similar to the insulation protection structure in embodiment 1, except that the fastener is a fastening seat,

[0049] In this embodiment, the fastening seat is a circular seat or a square seat, and a through hole corresponding to the mounting hole and the threaded hole is opened on the fastening seat. The fastening seat is block-shaped, and the corresponding mounting holes are arranged on the peripheral side between the battery bottom plate and the protective plate. The composite insulation layer is arranged in the space enclosed by multiple fastening seats. Example 3

[0050] See attached Figure 1 ~ 3 and 5, the utility model embodiment discloses a new energy vehicle battery insulation protection mechanism, which is similar to the insulation protection structure in embodiment 1, except that the fastener is a fastening strip,

[0051] The panel of the fastening strip is provided with through holes corresponding to the mounting holes and threaded holes. The fastening strip is arranged around the top surface of the protective plate, and the panel of the fastening strip is provided with through holes corresponding to the bolt holes. The middle cavity surrounded by the four fastening strips is used to accommodate the composite insulation layer.

[0052] The fastening strips can seal the composite insulation layer around the sides, further improving the thermal insulation performance of the battery. Example 4

[0053] See attached Figure 1 ~ 3 and 6, the utility model embodiment discloses a new energy vehicle battery insulation protection mechanism, which is similar to the insulation protection structure in embodiment 1, except that the insulation board is spliced ​​by multiple insulation modules.

[0054] The joints between the multiple heat-insulating modules are bonded and fixed by aluminum foil tape, and the multiple heat-insulating modules are provided with through holes corresponding to the mounting holes.

[0055] A mounting hole is provided in the middle of the battery base plate, a through hole is provided in the middle of the insulation plate which is arranged at intervals through a slender insulation module and is reserved to correspond to the mounting hole in the middle of the battery base plate, and a bolt hole corresponding to the through hole is provided on the protective base plate. The bolts penetrate the bolt hole, the through hole on the insulation plate and the mounting hole in sequence from the bottom surface of the protective base plate to clamp the insulation plate between the protective base plate and the protective plate. At this time, the size of the insulation plate is the same as that of the battery base plate and the protective plate. The protective plate, the insulation plate and the battery base plate are fastened by bolts without the need to set fasteners.

[0056] In order to further optimize the above technical solution, when the size of the insulation plate is smaller than the battery bottom plate and the protective plate, block-shaped fasteners are provided on the peripheral side of the insulation plate for sealing. Example 5

[0057] The utility model embodiment discloses a new energy vehicle battery heat preservation and protection mechanism, which is similar to the heat preservation and protection structure in Example 1, except that the number of infrared reflective films and waterproof protective films is multiple layers, the multiple layers of infrared protective films are stacked and bonded into a whole and then bonded to the top surface of the heat preservation board, and the multiple layers of waterproof protective films are stacked and bonded into a whole and then bonded to the bottom surface of the heat preservation board.

[0058] The protection effect of the battery is further improved by setting up multiple layers of infrared reflective film and waterproof protective film.

[0059] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0060] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A new energy vehicle battery thermal insulation protection mechanism, comprising a battery bottom plate (1), characterized in that: The bottom surface of the battery bottom plate (1) is provided with a composite heat insulation layer (2) and a protective plate (4) in order from top to bottom; The composite heat insulation layer (2) comprises an infrared reflective film (21), a heat preservation plate (22) and a waterproof protective film (23) bonded in sequence from top to bottom, and the protective plate (4) and the battery bottom plate (1) are bolted together via fasteners (3) to fix the composite heat insulation layer (2) between the protective plate (4) and the battery bottom plate (1).

2. A new energy vehicle battery thermal insulation protection mechanism according to claim 1, characterized in that: The infrared reflective film (21) and the waterproof protective film (23) completely cover the top surface and the bottom surface of the thermal insulation board (22) respectively.

3. A new energy vehicle battery thermal insulation protection mechanism according to claim 2, characterized in that: The panel of the protective plate (4) is provided with bolt holes corresponding to the mounting holes on the panel of the battery base plate (1), the fastener (3) is provided with through holes corresponding to the bolt holes, and the bolts (5) penetrate the bolt holes, the through holes and the mounting holes in sequence from bottom to top to fasten the protective plate (4), the fastener (3) and the battery base plate (1).

4. A new energy vehicle battery thermal insulation protection mechanism according to claim 3, characterized in that: The fastener (3) is in the form of a fastening seat, a fastening strip, or a combination of the two. The outer peripheral size of the composite thermal insulation layer (2) is smaller than the size of the protective plate (4). A plurality of the fasteners (3) are arranged on the peripheral side of the composite thermal insulation layer (2).

5. A new energy vehicle battery thermal insulation protection mechanism according to claim 4, characterized in that: When the fastener (3) is a fastening seat, it is a round seat or a square seat, and a through hole corresponding to the mounting hole and the threaded hole is provided on the fastening seat.

6. A new energy vehicle battery thermal insulation protection mechanism according to claim 4, characterized in that: When the fastener (3) is a fastening strip, a through hole corresponding to the mounting hole and the threaded hole is provided on the panel of the fastening strip.

7. A new energy vehicle battery thermal insulation protection mechanism according to any one of claims 4 or 5, characterized in that: The height of the fastener (3) is the same as the thickness of the composite thermal insulation layer (2).

8. A new energy vehicle battery thermal insulation protection mechanism according to claim 7, characterized in that: The insulation board (22) is manufactured in an integrated manner or is formed by splicing a plurality of insulation modules. The insulation board (22) is one of an aerogel board, a vacuum insulation board, a foamed polyurethane board, an extruded polystyrene board or a graphite polystyrene board, and has a thickness of 5 to 10 mm.

9. A new energy vehicle battery heat preservation and protection mechanism according to claim 8, characterized in that: When the insulation board (22) is formed by splicing a plurality of insulation modules, the joints between the insulation modules are bonded and fixed by aluminum foil tape, and the insulation modules are provided with through holes corresponding to the mounting holes.

10. A new energy vehicle battery thermal insulation protection mechanism according to claim 1, characterized in that: The infrared reflective film (21), the heat-insulating plate (22) and the waterproof protective film (23) are bonded and fixed to each other by double-sided adhesive (24).

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