Battery pack, electric vehicle and electric equipment

Abstract

The utility model discloses a battery pack, an electric vehicle and electric equipment, and belongs to the technical field of new energy, the battery pack comprises a bottom protection plate (100), a box body frame (200), a battery module (300) and a bottom protection layer (400); the bottom protection plate (100) is arranged at the bottom of the box body frame (200) to form an accommodating cavity of a battery module (300), and the battery module (300) is arranged in the accommodating cavity; and the bottom protection layer (400) is arranged between the battery module (300) and the bottom protection plate (100). By adding the bottom protection layer (400) between the bottom protection plate (100) and the battery module (300), when collision occurs, extrusion or impact energy borne by the bottom protection plate (100) can be further absorbed, impact borne by the bottom protection plate (100) is prevented from being directly transmitted to the battery module (300), buffering and further protection effects are achieved, damage to the battery module (300) is further reduced, and the service life of the battery module (300) is prolonged. And the safety of the battery pack is ensured.

Description

Technical Field

[0001] The present application belongs to the field of new energy technology, and specifically relates to a battery pack, an electric vehicle and electrical equipment. Background Art

[0002] Under the increasingly severe situation of global energy shortage and climate warming, people are calling for new energy more and more urgently. As a major energy consumer, automobiles must keep pace with the times and adapt to the needs of environmental protection. Therefore, new energy vehicles are predicted to be the ultimate trend of future automobile development.

[0003] With the development of electric vehicles, the battery pack, as the power source of new energy vehicles, its performance and safety directly determines the safety of the entire vehicle. The safety of the battery pack is a global problem.

[0004] The characteristics of automotive battery packs are incomparable to other power batteries, and there are potential dangers of collision, extrusion, etc. Collision or extrusion can easily cause the battery to catch fire or even explode. Therefore, the anti-collision ability of automotive battery packs is particularly important. Utility Model Content

[0005] The purpose of this application is to provide a battery pack, an electric vehicle and an electrical device to enhance the anti-collision capability of the battery pack.

[0006] According to a first aspect of an embodiment of the present application, a battery pack is provided, which may include: a bottom guard plate, a box frame, a battery module, and a bottom protective layer;

[0007] The bottom guard plate is arranged at the bottom of the box frame to form a housing cavity for the battery module, and the battery module is arranged in the housing cavity;

[0008] The bottom protective layer is arranged between the battery module and the bottom guard plate.

[0009] In some optional embodiments of the present application, the bottom protective layer includes: a bladder and a filler disposed in the bladder.

[0010] In some optional embodiments of the present application, the filler is made of a non-Newtonian fluid material.

[0011] In some optional embodiments of the present application, the filler is in the form of gas.

[0012] In some optional embodiments of the present application, the bag is made of thermal insulation material.

[0013] In some optional embodiments of the present application, the bag is made of a high-strength airtight material.

[0014] In some optional embodiments of the present application, a liquid cooling plate is further provided between the bottom protective layer and the battery module.

[0015] In some optional embodiments of the present application, an adhesive layer is further provided between the bottom protective layer and the bottom guard plate.

[0016] According to a second aspect of the embodiments of the present application, there is provided an electric vehicle, which may include: a battery pack as described in any one of the embodiments of the first aspect; and using the battery pack to provide electrical energy.

[0017] According to a third aspect of the embodiments of the present application, there is provided an electrical device, which may include: a battery pack as described in any one of the embodiments of the first aspect; and utilizing the battery pack to provide electrical energy.

[0018] The above technical solution of the present application has the following beneficial technical effects:

[0019] The battery pack in the embodiment of the present application adds a bottom protective layer between the bottom guard plate and the battery module. The bottom protective layer can further absorb the extrusion or impact energy of the bottom guard plate when a collision occurs, preventing the impact on the bottom guard plate from being directly transmitted to the battery module, thereby providing a buffering and further protective effect, thereby reducing damage to the battery module and ensuring the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an exploded schematic diagram of a battery pack in an exemplary embodiment of the present application;

[0021] Figure 2 is a three-dimensional diagram of a battery pack in an exemplary embodiment of the present application;

[0022] Figure 3 is a schematic diagram of a bottom protective layer before compression in an exemplary embodiment of the present application;

[0023] Figure 4 It is a schematic diagram of the bottom protective layer after compression in an exemplary embodiment of the present application.

[0024] Description of reference numerals:

[0025] 100: bottom guard plate; 200: box frame; 300: battery module; 400: bottom protective layer; 500: liquid cooling plate; 410: bladder bag; 420: filler. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with specific implementations and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concepts of the present application.

[0027] The accompanying drawings show schematic diagrams of layer structures according to embodiments of the present application. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clarity. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0028] Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0029] In the description of the present application, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0031] The battery pack, electric vehicle and electrical equipment provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0032] like Figure 1-2 As shown, in a first aspect of an embodiment of the present application, a battery pack is provided, which may include: a bottom guard plate 100, a box frame 200, a battery module 300 and a bottom protective layer 400;

[0033] The bottom guard plate 100 is disposed at the bottom of the box frame 200 to form a housing cavity for the battery module 300, and the battery module 300 is disposed in the housing cavity;

[0034] The bottom protective layer 400 is disposed between the battery module 300 and the bottom guard plate 100 .

[0035] In some optional embodiments of the present application, the bottom protective layer 400 includes: a bladder 410 and a filler 420 disposed in the bladder 410. The filler 420 is added to the bladder 410 before compression. Figure 3 As shown, it is then compressed to form Figure 4 As shown in the structure, at this time, the bottom protective layer 400 is formed.

[0036] The battery pack of this embodiment adds a bottom protective layer 400 between the bottom guard plate 100 and the battery module 300. The bottom protective layer 400 can further absorb the extrusion or impact energy of the bottom guard plate 100 when a collision occurs, and prevents the impact on the bottom guard plate 100 from being directly transmitted to the battery module 300, thereby providing a buffering and further protective effect, thereby reducing damage to the battery module 300 and ensuring the safety of the battery pack.

[0037] In some embodiments, the filler 420 is made of a non-Newtonian fluid material.

[0038] In this embodiment, the use of non-Newtonian fluid as the filler 420 can effectively absorb the impact or energy conducted by the bottom guard plate 100, and continuously absorb energy during the deformation of the bottom guard plate 100. In this way, the impact force / energy acting on the battery module 300 is below the safety threshold, thereby achieving a bottom protection effect and greatly improving the safety of the battery module 300.

[0039] In some embodiments, the filler 420 is in the form of gas.

[0040] Generally, there is a gap between the bottom guard plate 100 and the battery module 300, and the gap is filled with air. In this embodiment, a certain gas is used as the filler 420 of the bag 410, so that the protective effect can be achieved without increasing the space size and weight. In this embodiment, the bag 410 can be a high-strength packaging bag.

[0041] When the bottom of the battery pack is hit or squeezed, the bottom guard plate 100 is first deformed by the impact, and then the energy impact invades the bottom protective layer 400, which is squeezed, and the pressure in the sac 410 increases; due to the larger deformation directly above the squeezing point, the gas inside the sac 410 diffuses to other positions, and since the pressure in the sac 410 is the same, the squeezing energy is eventually distributed to other positions, increasing the force-bearing area, thereby reducing the damage to the squeezing point, and finally achieving a buffer protection effect to prevent the battery module from being damaged.

[0042] In addition, since the thermal conductivity of the gas is relatively low and the mass of the gas in the bag does not change with temperature, the bottom protective layer 400 is also a good bottom thermal insulation layer. The bottom protective layer 400 has the dual characteristics of bottom protection and thermal insulation.

[0043] In some embodiments, the bag 410 is made of thermal insulation material.

[0044] The bottom protective layer 400 in this embodiment has a certain heat insulation effect, and the bottom protective layer 400 is also a good bottom thermal insulation layer while providing protection. Therefore, the bottom protective layer 400 has the dual characteristics of bottom protection and thermal insulation.

[0045] In some embodiments, the bag 410 is made of a high-strength airtight material.

[0046] In order to encapsulate the gas, the bag 410 must be airtight, and in order to ensure impact resistance, the bag 410 must also be high-strength. Exemplarily, the bag 410 can be made of high-strength kraft paper, PP woven bag and PE film.

[0047] like Figure 1 As shown, in some embodiments, a liquid cooling plate 500 is further disposed between the bottom protective layer 400 and the battery module 300 .

[0048] In order to cool down the battery module 300, a liquid cooling plate 500 is provided between the battery module 300 and the bottom protective layer 400 in this embodiment to prevent the temperature of the battery module from exceeding a threshold value and causing danger. At this time, the bottom protective layer 400 not only provides protection but also serves as a good bottom thermal insulation layer.

[0049] like Figure 1 As shown, in some embodiments, an adhesive layer is further provided between the bottom protective layer 400 and the bottom guard plate 100 .

[0050] In this embodiment, a certain area of ​​adhesive layer can be provided at the bottom of the bottom protective layer 400. During installation, the bottom protective layer 400 is laid flat on the bottom protective plate 100 and adhered to the bottom protective plate 100 through the adhesive layer. The addition of the adhesive layer can make the installation of the battery pack simpler and more convenient, suitable for mass production; and the structure has greater flexibility. Exemplarily, the adhesive layer can be a double-sided adhesive.

[0051] In addition, if Figure 1As shown, an upper cover plate connected to the box frame 200 is also provided on the top of the battery pack, and the upper cover plate protects the battery module 300 from the top. Preferably, a protective layer can also be provided between the upper cover plate and the battery module 300, and the protective layer can also be a pouch 410 filled with a certain filler 420. The repetitive descriptions, functions and effects of the pouch 410 and the filler 420 are not repeated here.

[0052] In a specific embodiment of the present application, a battery pack is provided, including: a box frame 200, a battery module 300, a liquid cooling plate 500, a bottom protective layer 400 and a bottom guard plate 100;

[0053] The bottom guard plate 100 is disposed at the bottom of the box frame 200 to form a housing cavity for the battery module 300, and the battery module 300 is disposed in the housing cavity;

[0054] The bottom protective layer 400 is disposed between the battery module 300 and the bottom protective plate 100 , and the liquid cooling plate 500 is disposed between the bottom protective layer 400 and the battery module 300 .

[0055] The bottom protective layer 400 includes: a bag 410 and a filler 420 disposed in the bag 410. The filler 420 is a non-Newtonian fluid material or a gas; and the bag 410 is made of a thermal insulation material.

[0056] In addition, an adhesive layer is provided between the bottom protective layer 400 and the bottom guard plate 100 .

[0057] The battery pack of the above embodiment adds the bottom protective layer 400 between the bottom guard plate 100 and the battery module 300. The bottom protective layer 400 can further absorb the extrusion or impact energy of the bottom guard plate 100 in the event of a collision, preventing the impact of the bottom guard plate 100 from being directly transmitted to the battery module 300, thereby providing a buffer and further protection effect, thereby reducing damage to the battery module 300 and ensuring the safety of the battery pack. The battery pack of this embodiment is provided with the liquid cooling plate 500 to cool the battery module 300, and the battery pack of this embodiment is also provided with an adhesive layer to facilitate the installation of the battery pack.

[0058] In a second aspect of the embodiments of the present application, an electric vehicle is provided, which may include: a battery pack as described in any one of the embodiments of the first aspect; and using the battery pack to provide electrical energy.

[0059] For the convenience and simplicity of description, the specific structure of the electric vehicle described above can refer to the corresponding introduction in the aforementioned battery pack embodiment. The technical problems solved and the technical effects achieved by the battery pack can also be achieved by the electric vehicle and will not be repeated here.

[0060] In a third aspect of the embodiments of the present application, there is provided an electrical device, which may include: a battery pack as described in any one of the embodiments of the first aspect; and utilizing the battery pack to provide electrical energy.

[0061] For the convenience and simplicity of description, the specific structure of the electrical equipment described above can refer to the corresponding introduction in the aforementioned battery pack embodiment. The technical problems solved and the technical effects achieved by the battery pack can also be achieved by the electrical equipment, and will not be repeated here.

[0062] The present application aims to protect a battery pack, including: a bottom guard plate 100, a box frame 200, a battery module 300 and a bottom protective layer 400; the bottom guard plate 100 is arranged at the bottom of the box frame 200 to form a housing cavity for the battery module 300, and the battery module 300 is arranged in the housing cavity; the bottom protective layer 400 is arranged between the battery module 300 and the bottom guard plate 100. By adding the bottom protective layer 400 between the bottom guard plate 100 and the battery module 300, the extrusion or impact energy of the bottom guard plate 100 can be further absorbed in the event of a collision, and the impact of the bottom guard plate 100 can be prevented from being directly transmitted to the battery module 300, thereby achieving a buffering and further protective effect, thereby reducing the damage to the battery module 300 and ensuring the safety of the battery pack.

[0063] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A battery pack, characterized in that: include: A bottom guard plate (100), a box frame (200), a battery module (300) and a bottom protective layer (400); The bottom guard plate (100) is arranged at the bottom of the box frame (200) to form a housing cavity for the battery module (300), and the battery module (300) is arranged in the housing cavity; The bottom protective layer (400) is arranged between the battery module (300) and the bottom guard plate (100).

2. The battery pack according to claim 1, characterized in that: The bottom protective layer (400) comprises a bag and a filler arranged in the bag.

3. The battery pack according to claim 2, characterized in that: The filler is made of non-Newtonian fluid material.

4. The battery pack according to claim 2, characterized in that: The filling material is in the form of gas.

5. The battery pack according to claim 2, characterized in that: The bag is made of heat-insulating material.

6. The battery pack according to claim 2, characterized in that: The material of the bag is a high-strength airtight material.

7. The battery pack according to any one of claims 1 to 6, characterized in that: A liquid cooling plate (500) is also provided between the bottom protective layer (400) and the battery module (300).

8. The battery pack according to any one of claims 1 to 6, characterized in that: An adhesive layer is also provided between the bottom protective layer (400) and the bottom guard plate (100).

9. An electric vehicle, characterized in that: include: The battery pack according to any one of claims 1 to 8; The battery pack is used to provide electrical energy.

10. An electrical device, characterized in that: include: The battery pack according to any one of claims 1 to 8; The battery pack is used to provide electrical energy.

Images