A bottom protection device of a new energy battery pack

Abstract

The utility model discloses a bottom protection device of new energy battery package, including frame body, be fixed in the bottom of battery package outer frame through fixing piece, absorption layer, this absorption layer is clamped in the inner bottom of frame body, is used to absorb the impact of foreign matter that flies up on the ground, interlayer structure, fixed mounting in the inside of frame body, is used to form the obstruction to puncture thing, and this device has excellent anti -puncture performance, heat -insulating and heat -dissipating performance, and absorption component is fixed stable, is convenient for maintenance.

Description

Technical Field

[0001] This utility model relates to a bottom protection device for a new energy battery pack. Background Technology

[0002] The battery pack of a new energy vehicle is the core component of the vehicle's power output. Its installation location is usually close to the bottom of the vehicle. During the vehicle's operation, it is easily impacted or punctured by protruding foreign objects on the ground (such as stones). At the same time, it also needs to cope with the high temperature conduction from the ground and the heat dissipation of the battery itself.

[0003] Existing bottom protection devices for new energy battery packs mostly adopt a single plate or simple sandwich structure design, which has many shortcomings:

[0004] Firstly, its puncture resistance is limited; it is easily punctured when faced with large or hard ground objects, which can damage the battery pack.

[0005] Secondly, the heat insulation effect is poor. Especially in the high temperature environment in summer, the high temperature of the ground can be easily conducted to the inside of the battery pack through the protective device, which affects the battery's working performance and service life.

[0006] Third, the heat generated by the battery itself is difficult to dissipate effectively and tends to accumulate at the bottom of the battery pack, posing a safety hazard; fourth, some impact absorption components in the protective devices use a fixed connection method, which is inconvenient to replace after damage and has high maintenance costs.

[0007] Fifth, the absorption components are prone to warping after installation, affecting the stability of the protection.

[0008] Therefore, developing a bottom protection device for new energy battery packs that combines excellent puncture resistance and heat insulation performance, as well as stable and easy-to-maintain absorption components, has become an urgent technical problem to be solved in this field. Utility Model Content

[0009] The technical problem to be solved by this utility model is to provide a bottom protection device for a new energy battery pack that has excellent puncture resistance, heat insulation and heat dissipation performance, and stable and easy-to-maintain absorption components.

[0010] To solve the above problems, the present invention adopts the following technical solution:

[0011] A bottom protection device for a new energy battery pack includes,

[0012] The frame is fixed to the bottom of the outer frame of the battery pack by fasteners;

[0013] An absorbent layer is clamped to the inner bottom of the frame to absorb the impact of foreign objects flying from the ground.

[0014] The sandwich structure is fixedly installed inside the frame to block the puncture.

[0015] Preferably, the frame body has an inner frame located in the center of the frame body. The sandwich structure includes an upper plate and a lower plate, which are fixed to the upper and lower parts of the inner frame body, respectively. After fixing, a sandwich gap is formed between the upper plate and the lower plate to increase the heat insulation effect.

[0016] Preferably, a lower frame is provided at the bottom of the frame body, the inner dimension of the lower frame is smaller than the inner dimension of the frame body, the fastener passes through the lower frame and the frame body and is screwed into the outer frame of the battery pack, and the lower frame is fixed by the fastener to fix the absorption layer.

[0017] Preferably, the absorbent layer and the lower plate are glued together and fixed.

[0018] Preferably, the absorbent layer is a polyester felt.

[0019] Preferably, both the upper and lower layers are hybrid fiber reinforced boards.

[0020] Preferably, a honeycomb heat dissipation plate is filled in the upper part of the upper plate, and the surface of the honeycomb heat dissipation plate is evenly distributed with honeycomb holes; when the frame body is fixed to the outer frame of the battery pack, the honeycomb heat dissipation plate contacts the bottom of the battery pack to absorb battery heat; a support strip is laid on the top of the upper plate, and the honeycomb heat dissipation plate is suspended under the support of the support strip; a ventilation slot is provided at the rear end of the frame body.

[0021] The beneficial effects of this utility model are:

[0022] 1. Excellent puncture resistance: The double design of the upper and lower plates of the sandwich structure provides double puncture protection, which can effectively resist the impact and puncture of protruding foreign objects on the ground, and greatly improve the protection of the battery pack.

[0023] 2. Excellent heat insulation and heat dissipation: The gap between the upper and lower plates of the sandwich structure can effectively insulate against high ground temperatures; the honeycomb heat dissipation plate can quickly absorb the heat generated by the battery during operation. Combined with the overhead design and the linkage between the ventilation slots and the vehicle's cooling system, it forms an efficient heat dissipation cycle, which not only avoids the conduction of high ground temperatures but also solves the battery's own heat dissipation problem, ensuring the battery's operational stability and service life.

[0024] 3. Stable and easy-to-maintain absorption layer: The perimeter fixing design of the bottom frame effectively avoids the problem of the absorption layer curling up; at the same time, the absorption layer adopts a detachable design, which can be quickly replaced when damaged, reducing maintenance costs.

[0025] 4. Lightweight design: The frame is made of lightweight high-strength aluminum alloy, which reduces the overall weight of the device while ensuring structural strength, meeting the lightweight development needs of new energy vehicles. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an exploded view of the structure of this device;

[0028] Figure 2 This is a magnified view of point A;

[0029] Figure 3 This is a magnified view of point B.

[0030] In the diagram: 1-Frame body, 11-Inner frame, 121-Lower frame, 122-Ventilation slot, 2-Absorption layer, 3-Mezzanine structure, 31-Upper plate, 32-Lower plate, 321-Supporting strip, 4-Honeycomb heat dissipation plate. Detailed Implementation

[0031] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0032] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0033] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] See Figure 1 The bottom protection device of a new energy battery pack shown includes,

[0037] The frame 1 is fixed to the bottom of the outer frame of the battery pack by fasteners (screws); the frame 1 is made of lightweight high-strength aluminum alloy; the thickness of the frame 1 is controlled within 2cm.

[0038] Absorption layer 2 is clamped to the inner bottom of the frame 1 to absorb the impact of foreign objects flying from the ground; absorption layer 2 is detachable for easy replacement after being punctured.

[0039] The sandwich structure 3 is fixedly installed inside the frame body 1 to block the puncture object.

[0040] The sandwich structure 3 is built-in to enhance vertical puncture resistance, especially against protruding foreign objects on the ground, such as stones.

[0041] See Figure 2 As shown, the frame 1 has an inner frame 11 located in the center of the frame 1. The sandwich structure 3 includes an upper plate 31 and a lower plate 32, which are fixed to the upper and lower parts of the inner frame 11 respectively using strong adhesive. After fixing, a sandwich gap is formed between the upper plate 31 and the lower plate 32 to increase the heat insulation effect.

[0042] The above technical solution adopts the design of inner frame 11, which is used for the spaced installation of upper plate 31 and lower plate 32 to isolate heat transfer, especially in summer, it can isolate the high temperature of the ground.

[0043] Furthermore, the combination design of the upper plate 31 and the lower plate 32 can provide a double puncture protection effect, further increasing the protection of the solar panel.

[0044] See Figure 1As shown, a lower frame 121 is provided at the bottom of the frame body 1. The inner dimension of the lower frame 121 is smaller than the inner dimension of the frame body 1. The fastener passes through the lower frame 121 and the frame body 1 and is screwed into the outer frame of the battery pack. After the lower frame 121 is fixed by the fastener, it forms a fixed structure for the absorption layer 2. An adhesive strip 122 is sandwiched between the lower frame 121 and the frame body 1.

[0045] In the above technical solution, the bottom frame 121 is used to fix the four sides, avoiding the edge warping problem in traditional technology.

[0046] The absorbent layer 2 and the lower plate 32 are glued and fixed together.

[0047] Using adhesive bonding can further enhance the fixation effect on the absorbent layer 2.

[0048] The absorbent layer 2 is a polyester felt.

[0049] Both the upper plate 31 and the lower plate 32 are hybrid fiber reinforced plates.

[0050] The hybrid fiber reinforced board specifically uses carbon fiber mixed with high-toughness fibers (such as aramid fiber and ultra-high molecular weight polyethylene fiber UHMwPE). The high elongation at break (3%-5%) and impact resistance of aramid are used to compensate for the brittleness of carbon fiber, forming a synergistic effect of "carbon fiber load-bearing capacity + aramid impact resistance".

[0051] See Figure 1 and Figure 3 As shown, a honeycomb heat dissipation plate 4 is filled in the upper part of the upper plate 31, and the surface of the honeycomb heat dissipation plate 4 is evenly distributed with honeycomb holes; when the frame body 1 is fixed to the outer frame of the battery pack, the honeycomb heat dissipation plate 4 contacts the bottom of the battery pack to absorb battery heat; a support strip 321 is laid on the top of the upper plate 32, and the honeycomb heat dissipation plate 4 is suspended under the support of the support strip 321; a ventilation slot 122 is provided at the rear end of the frame body 1.

[0052] There are two ventilation slots 122, one for air intake and the other for air exhaust. The air intake ventilation slot 122 is connected to the vehicle's cooling system, so that the cold air generated by the vehicle's cooling system enters through one of the ventilation slots 122, absorbs the heat of the honeycomb heat sink 4, and is then exhausted through the other ventilation slot 122.

[0053] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0055] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0056] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0057] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bottom protection device for a new energy battery pack, characterized in that: include, The frame is fixed to the bottom of the outer frame of the battery pack by fasteners; An absorbent layer is clamped to the inner bottom of the frame to absorb the impact of foreign objects flying from the ground. The sandwich structure is fixedly installed inside the frame to block the puncture.

2. The bottom protection device for the new energy battery pack according to claim 1, characterized in that: The frame body has an inner frame located in the center of the frame body. The sandwich structure includes an upper plate and a lower plate, which are fixed to the upper and lower parts of the inner frame body, respectively. After fixing, a sandwich gap is formed between the upper plate and the lower plate to increase the heat insulation effect.

3. The bottom protection device for the new energy battery pack according to claim 2, characterized in that: A bottom frame is provided at the bottom of the frame body. The inner dimension of the bottom frame is smaller than the inner dimension of the frame body. The fastener passes through the bottom frame and the frame body and is screwed into the outer frame of the battery pack. The bottom frame is fixed by the fastener to fix the absorption layer.

4. The bottom protection device for the new energy battery pack according to claim 3, characterized in that: The absorbent layer and the lower plate are glued together and fixed.

5. The bottom protection device for a new energy battery pack according to claim 2 or 3, characterized in that: The absorbent layer is a polyester felt.

6. The bottom protection device for the new energy battery pack according to claim 2, characterized in that: Both the upper and lower layers are hybrid fiber reinforced boards.

7. The bottom protection device for the new energy battery pack according to claim 2, characterized in that: A honeycomb heat dissipation plate is filled in the upper part of the upper plate, and the surface of the honeycomb heat dissipation plate is evenly distributed with honeycomb holes. When the frame body is fixed to the outer frame of the battery pack, the honeycomb heat dissipation plate contacts the bottom of the battery pack to absorb battery heat. A support strip is laid on the top of the upper plate, and the honeycomb heat dissipation plate is suspended under the support of the support strip. A ventilation slot is provided at the rear end of the frame body.

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