Box body protection structure and battery pack

Abstract

The utility model belongs to the technical field of battery equipment, and discloses a box body protection structure which comprises a bottom protection plate, a battery module is placed on the bottom protection plate, a reinforcing plate is arranged on one side, deviating from the battery module, of the bottom protection plate, a buffer block is arranged on one side, facing the battery module, of the bottom protection plate, and the buffer block is arranged between the battery module and the bottom protection plate. The reinforcing plate comprises a plurality of supporting parts and connecting parts which are alternately distributed and connected, the supporting parts and the bottom protection plate are arranged at intervals, the connecting parts abut against the bottom protection plate, and the buffer blocks are arranged corresponding to the positions of the connecting parts. According to the box body protection structure disclosed by the utility model, the impact strength of the bottom protection plate can be effectively improved, so that the protection effect on the battery module is improved, and the overall protection effect and safety performance of a battery pack are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery equipment, in particular to a box protection structure and a battery pack. Background Art

[0002] With the rapid development of the new energy battery industry, the safety requirements for batteries are becoming increasingly higher. In the long-term use of the battery pack of electric vehicles, the physical strength and anti-collision and impact strength of the battery pack are becoming increasingly important. In general use, the bottom of the battery pack is used to install and fix with external electrical equipment such as electric vehicles, so the main collisions and impacts to the battery pack basically come from the bottom of the battery pack. However, at present, only ordinary designs are used for the box structure of the battery pack, and no special protection design is made for the bottom of the box structure, so that the box structure only serves as a carrier and container for the battery module, and the protection effect for the battery module is general, resulting in a large number of new energy vehicles. The battery pack has caught fire or even exploded due to damage or destruction of the bottom of the box structure of the battery pack, which seriously endangers the life and property safety of drivers and passengers. Utility Model Content

[0003] One purpose of the utility model is to provide a box protection structure, which can effectively improve the impact resistance of the bottom guard plate, thereby improving the protection effect on the battery module.

[0004] Another object of the present invention is to provide a battery pack that can effectively improve the protection effect of the battery module and improve the safety of the entire battery pack.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] On the one hand, a box protection structure is provided, including a bottom guard plate, a battery module is placed on the bottom guard plate, a reinforcement plate is provided on the side of the bottom guard plate facing away from the battery module, a buffer block is provided on the side of the bottom guard plate facing the battery module, the buffer block is arranged between the battery module and the bottom guard plate, the reinforcement plate includes a plurality of supporting parts and connecting parts that are alternately distributed and connected to each other, the supporting parts are spaced apart from the bottom guard plate, the connecting parts abut against the bottom guard plate, and the buffer block is arranged corresponding to the position of the connecting parts.

[0007] In one embodiment, the bottom guard plate includes a base plate and buffer plates arranged on both sides of the base plate in the thickness direction, the base plate is provided with a plurality of wetting holes penetrating the base plate, a connecting bracket is provided in the wetting hole, and the buffer plates on both sides of the base plate are connected by the connecting bracket.

[0008] In one embodiment, the buffer plates on both sides of the base plate are fixedly connected to the connecting brackets to form a whole.

[0009] In one embodiment, the reinforcing plate is wavy. The protrusion of the wavy reinforcing plate facing the bottom protection plate is the connecting portion, and the protrusion of the wavy reinforcing plate away from the bottom protection plate is the supporting portion. A buffer channel is formed between the supporting portion and the bottom protection plate.

[0010] In one embodiment, a buffer layer is provided on the side of the reinforcing plate facing away from the bottom protection plate.

[0011] In one embodiment, a plurality of buffer blocks are provided, and the plurality of buffer blocks are evenly distributed in a matrix along the length direction of the connecting portion in the placement cavity.

[0012] In one embodiment, it further includes a bracket. The bracket is arranged in the placement cavity, and the bracket is arranged between the battery module and the buffer block. An avoidance through hole corresponding to the pressure relief valve on the battery module is provided on the bracket.

[0013] In one embodiment, the bracket and the bottom protection plate are spaced apart by the buffer block to form a pressure relief cavity, and the pressure relief valve is communicated with the pressure relief cavity through the avoidance through hole.

[0014] On the other hand, a battery pack is provided, including a box body. The box body includes the above-mentioned box body protection structure, and a placement cavity for placing the battery module and the buffer block is provided in the box body.

[0015] In one embodiment, the box body further includes a frame and a cover plate. The bottom protection plate, the frame and the cover plate are connected to each other to form the sealed placement cavity.

[0016] Advantages of the present utility model:

[0017] For a box body protection structure of the present utility model, by providing a reinforcing plate on the outer side of the bottom protection plate, the bottom protection plate can be effectively protected and strengthened, improving the impact resistance of the overall bottom structure of the box body, thereby effectively protecting the protection performance of the overall structure of the battery pack and ensuring the normal operation of the battery pack. Among them, buffer blocks are further provided on the side of the bottom protection plate facing the battery module, and the buffer blocks are arranged between the battery module and the bottom protection plate, so that the buffer blocks can achieve the effects of buffering and absorbing impact energy, realizing the function of buffering and absorbing energy for the battery module, reducing the impact energy transmitted to the battery module after the bottom protection plate is impacted, reducing the amplitude and possibility of damage and destruction of the battery module, and realizing the effective protection of the battery module. Further, the buffer blocks are correspondingly arranged at the connection position between the connecting portion of the reinforcing plate and the bottom protection plate, and this position is on the force conduction path, so as to improve the energy absorption efficiency of the buffer blocks and further improve the protection performance of the overall structure. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of a battery pack in one of the embodiments;

[0019] Figure 2 is an exploded structural diagram of a box protection structure in one of the embodiments;

[0020] Figure 3 is a partial structural diagram of one side of a protection box in one of the embodiments;

[0021] Figure 4 is a sectional structural diagram of a box protection structure in one of the embodiments;

[0022] Figure 5 is Figure 4 an enlarged structural diagram of part A in;

[0023] Figure 6 is a sectional structural diagram of a bottom protection plate in one of the embodiments;

[0024] Figure 7 is a schematic structural diagram of a buffer plate and a connecting bracket in one of the embodiments;

[0025] Figure 8 is a schematic structural diagram of a reinforcing plate in one of the embodiments;

[0026] Figure 9 is a schematic structural diagram of a bracket in one of the embodiments.

[0027] In the figure:

[0028] 1. Battery pack; 100. Box body; 110. Placement cavity; 120. Bottom protection plate; 121. Substrate; 1211. Infiltration hole; 122. Buffer plate; 123. Connecting bracket; 124. First mounting hole; 130. Frame; 131. Second mounting hole; 140. Cover plate; 141. Third mounting hole; 150. Pressure relief cavity; 200. Reinforcing plate; 210. Support part; 220. Connecting part; 230. Buffer layer; 240. Buffer channel; 300. Buffer block; 400. Bracket; 410. Avoidance through hole; 500. Battery module. Detailed Description of the Embodiments

[0029] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all the structures.

[0030] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0032] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] As Figures 1 to 9 shown, a box body protection structure of this embodiment includes a bottom protection plate 120. The battery module 500 is placed on the bottom protection plate 120. A reinforcing plate 200 is provided on the side of the bottom protection plate 120 facing away from the battery module 500. A buffer block 300 is provided on the side of the bottom protection plate 120 facing the battery module 500. The buffer block 300 is arranged between the battery module 500 and the bottom protection plate 120. The reinforcing plate 200 includes a plurality of alternately distributed and connected support portions 210 and connection portions 220. The support portions 210 are arranged at intervals with the bottom protection plate 120, and the connection portions 220 are in contact with the bottom protection plate 120. The buffer block 300 is arranged at a position corresponding to the connection portion 220.

[0034] In this embodiment, a reinforcing plate 200 is arranged on the outer side of the bottom guard plate 120 to effectively protect and reinforce the bottom guard plate 120, improve the impact resistance of the overall bottom structure of the box body 100, thereby effectively protecting the protection performance of the overall structure of the battery pack, and ensuring the normal operation of the battery pack. Among them, a buffer block 300 is further arranged on the side of the bottom guard plate 120 facing the battery module 500, and the buffer block 300 is arranged between the battery module 500 and the bottom guard plate 120, so that the buffer block 300 can achieve the effects of buffering and absorbing impact energy, realizing the function of buffering and absorbing energy of the battery module 500, reducing the impact energy transmitted to the battery module 500 after the bottom guard plate 120 is impacted, and reducing the possibility of damage and destruction of the battery module 500, thus realizing the effective protection of the battery module 500. Further, the buffer block 300 is correspondingly arranged at the connection position between the connection part 220 of the reinforcing plate 200 and the bottom guard plate 120, and this position is on the force conduction path, so as to improve the energy absorption efficiency of the buffer block 300 and further improve the protection performance of the overall structure.

[0035] In one embodiment, as Figures 6 to 7 shown, the bottom guard plate 120 includes a base plate 121 and buffer plates 122 arranged on both sides of the base plate 121 in the thickness direction. A plurality of infiltration holes 1211 penetrating the base plate 121 are provided on the base plate 121, and connection brackets 123 are arranged in the infiltration holes 1211. The buffer plates 122 on both sides of the base plate 121 are connected by the connection brackets 123. Among them, the plurality of infiltration holes 1211 are evenly distributed on the base plate 121 to ensure the stable connection between the buffer plates 122 on both sides of the base plate 121 and the connection brackets 123, ensure that the buffer plates 122 on both sides of the base plate 121 are as evenly stressed as possible, which is beneficial to improving the overall impact resistance of the bottom guard plate 120 and the protection effect of the bottom guard plate 120.

[0036] In one embodiment, the buffer plates 122 on both sides of the base plate 121 are respectively fixedly connected to the connection brackets 123 to form a single body. Specifically, the buffer plates 122 on both sides of the base plate 121 and the connection brackets 123 are integrally injection-molded, which is beneficial to ensuring that the protection structure composed of the buffer plates 122 on both sides of the base plate 121 and the connection brackets 123 forms a sandwich-structured bottom guard plate 120 with the base plate 121. Such a bottom guard plate 120 has a more solid structure, improves the impact resistance of the bottom guard plate 120, and improves the protection effect of the bottom guard plate 120.

[0037] In actual operation, the buffer plate 122 is a polyurethane buffer plate 122 or a modified epoxy resin buffer plate 122. The polyurethane buffer plate 122 and the modified epoxy resin buffer plate 122 have strong polarity and relatively high strength after curing, enabling the bottom protection plate 120 to have better impact resistance, thereby improving the protection effect of the bottom protection plate 120. Of course, in addition to this embodiment, buffer plates 122 with other material structures can also be used, as long as they can improve the impact resistance of the bottom protection plate 120 to enhance the protection effect of the bottom protection plate 120. Such designs fall within the protection scope of the present utility model.

[0038] In one embodiment, the reinforcing plate 200 is wavy. The protrusion on the side of the wavy reinforcing plate 200 facing the bottom protection plate 120 is the connecting portion 220, and the protrusion on the side of the wavy reinforcing plate 200 away from the bottom protection plate 120 is the supporting portion 210. A buffer channel 240 is formed between the supporting portion 210 and the bottom protection plate 120. Specifically, when the bottom of the battery pack is impacted, the supporting portion 210 first comes into contact with and is impacted by external equipment towards the outside. The impact force is conducted from the connection between the supporting portion 210 and the connecting portion 220 to the connecting portion 220, and then through the connecting portion 220 to the bottom protection plate 120, the buffer block 300, and the battery module 500 in sequence. Through layer-by-layer protection, the impact on the battery module 500 when the bottom of the battery pack is impacted is greatly reduced, which is beneficial to protecting the battery module 500 from being damaged or impaired and ensuring the safety of the battery module 500. Among them, when the supporting portion 210 is impacted, since there is a buffer channel 240 formed by the spaced arrangement between the supporting portion 210 and the bottom protection plate 120, a certain degree of buffering effect on the impact can be achieved, avoiding the impact force directly passing through the supporting portion 210 to the bottom protection plate 120.

[0039] Of course, in addition to this embodiment, other structural forms of the reinforcing plate 200, such as a pulse shape, can also be used, as long as they can achieve the protection and conduction effects of the reinforcing plate 200 in this embodiment. Such designs fall within the protection scope of the present utility model.

[0040] In one embodiment, a buffer layer 230 is provided on the side of the reinforcing plate 200 facing away from the bottom protection plate 120, which is used to further improve the impact resistance of the reinforcing plate 200 and enhance the protection effect of the reinforcing plate 200 on the bottom protection plate 120. Specifically, the buffer layer 230 is a PVC buffer layer 230. The specific operation is to spray a layer of PVC buffer layer 230 on the bottom of the reinforcing plate 200, which can effectively reduce noise and also play a certain role in buffering and energy absorption.

[0041] In one embodiment, a plurality of buffer blocks 300 are provided. The plurality of buffer blocks 300 are distributed in a matrix within the placement cavity 110 along the length direction of the connecting portion 220, so that the impact energy conducted by the connecting portion 220 can be evenly absorbed by the buffer blocks 300, avoiding ineffective local energy absorption that may lead to an inability to achieve an effective protection effect.

[0042] In actual operation, the buffer blocks 300 are made of a hard buffer material, such as materials like PU, EPP, EPA or PPE, so that the buffer blocks 300 have excellent energy absorption effects. Of course, other energy absorption materials can also be used, as long as the energy absorption properties and effects of the buffer blocks 300 can be ensured. Such designs all fall within the protection scope of the present utility model.

[0043] In one embodiment, it further includes a bracket 400. The bracket 400 is arranged within the placement cavity 110, and the bracket 400 is arranged between the battery module 500 and the buffer blocks 300. The battery module 500 is supported by the bracket 400, and the battery module 500 is placed on the bracket 400 and is spaced from the bottom guard plate 120 by the buffer blocks 300, so as to effectively reduce the impact force transmitted to the battery module 500 by the bottom guard plate 120 after being impacted, which is beneficial to improving the protection effect on the battery module 500. The bracket 400 is provided with an avoidance through hole 410 corresponding to the pressure relief valve on the battery module 500 to facilitate the installation and fixation of the battery module 500 and avoid affecting the normal pressure relief of the battery module 500.

[0044] In one embodiment, the bracket 400 and the bottom guard plate 120 are spaced apart by the buffer blocks 300 to form a pressure relief cavity 150. The pressure relief valve is communicated with the pressure relief cavity 150 through the avoidance through hole 410. The pressure relief cavity 150 reserves a pressure relief space for the battery module 500, reducing the situation where the pressure in the placement cavity 110 becomes too high when the battery module 500 relieves pressure, resulting in the expansion or even explosion and damage of the box body 100, which is beneficial to improving the safety performance of the battery pack.

[0045] As Figures 1 to 9 shown, this embodiment also provides a battery pack 1, including a box body 100. The box body 100 includes the above-mentioned box body protection structure, and a placement cavity for placing the battery module and the buffer blocks is provided inside the box body. Thus, the box body 100 of the battery pack 1 in this embodiment can have good bottom support and protection effects, so as to effectively buffer and protect against collisions and impacts from the bottom of the battery pack 1, reduce the influence of this part of the collisions and impacts on the battery module 500 inside the battery pack 1, ensure the safety performance of the battery pack 1, and reduce the situation where the bottom of the battery pack 1 is damaged or destroyed, leading to the fire or even explosion of the battery pack 1, which is beneficial to ensuring the life and property safety of the driver and passengers.

[0046] In one embodiment, the box body 100 further includes a frame 130 and a cover plate 140. The bottom protection plate 120, the frame 130 and the cover plate 140 are connected to each other to form a sealed placement cavity 110. The battery module 500 is loaded and sealed through the bottom protection plate 120, the frame 130 and the cover plate 140, and is protected to ensure the overall structure of the battery pack is firm and stable, and improve the safety performance of the battery pack. Specifically, corresponding first mounting holes 124, second mounting holes 131 and third mounting holes 141 are respectively provided on the bottom protection plate 120, the frame 130 and the cover plate 140. The connection and fixation of the bottom protection plate 120, the frame 130 and the cover plate 140 are realized by using fasteners such as bolts to pass through the first mounting frame, the second mounting holes 131 and the third mounting holes 141 respectively.

[0047] In this embodiment, by integrally injection molding the buffer plate 122 and the connection bracket 123 on both sides of the substrate 121, in the case of laying the adhesive film on the bottom protection plate 120 during normal manufacturing, it is beneficial to reduce the production cost and the thickness of the bottom protection plate 120, and it is also convenient for subsequent gluing of the bottom protection plate 120 to structures such as the frame 130 or an external bracket.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A box protection structure, characterized in that: The invention comprises a bottom guard plate (120), a battery module (500) is placed on the bottom guard plate (120), a reinforcing plate (200) is provided on a side of the bottom guard plate (120) facing away from the battery module (500), a buffer block (300) is provided on a side of the bottom guard plate (120) facing the battery module (500), the buffer block (300) is arranged between the battery module (500) and the bottom guard plate (120), the reinforcing plate (200) comprises a plurality of supporting portions (210) and connecting portions (220) which are alternately connected to each other, the supporting portions (210) are arranged at intervals from the bottom guard plate (120), the connecting portions (220) are in contact with the bottom guard plate (120), and the buffer block (300) is arranged at a position corresponding to the connecting portion (220).

2. The box protection structure according to claim 1, characterized in that: The bottom guard plate (120) comprises a base plate (121) and buffer plates (122) arranged on both sides of the base plate (121) in a thickness direction; the base plate (121) is provided with a plurality of wetting holes (1211) penetrating the base plate (121); a connecting bracket (123) is arranged in the wetting hole (1211); and the buffer plates (122) on both sides of the base plate (121) are connected via the connecting bracket (123).

3. The box protection structure according to claim 2, characterized in that: The buffer plates (122) on both sides of the base plate (121) are respectively fixedly connected to the connecting brackets (123) to form an integral whole.

4. The box protection structure according to any one of claims 1 to 3, characterized in that: The reinforcing plate (200) is wavy in shape, a protrusion on the side of the wavy reinforcing plate (200) facing the bottom guard plate (120) is the connecting portion (220), a protrusion on the side of the wavy reinforcing plate (200) away from the bottom guard plate (120) is the supporting portion (210), and a buffer channel (240) is formed between the supporting portion (210) and the bottom guard plate (120).

5. The box protection structure according to claim 4, characterized in that: A buffer layer (230) is provided on the side of the reinforcement plate (200) facing away from the bottom guard plate (120).

6. The box protection structure according to any one of claims 1 to 3, characterized in that: A plurality of the buffer blocks (300) are provided, and the plurality of the buffer blocks (300) are distributed in a matrix.

7. The box protection structure according to any one of claims 1 to 3, characterized in that: It also includes a bracket (400), the bracket (400) being arranged between the battery module (500) and the buffer block (300), and the bracket (400) being provided with an avoidance through hole (410) arranged corresponding to the pressure relief valve on the battery module (500).

8. The box protection structure according to claim 7, characterized in that: The bracket (400) and the bottom guard plate (120) are spaced apart by the buffer block (300) to form a pressure relief chamber (150), and the pressure relief valve is in communication with the pressure relief chamber (150) via the avoidance through hole (410).

9. A battery pack, comprising a box body (100), characterized in that: The box body (100) comprises the box protection structure according to any one of claims 1 to 8, and a placement cavity (110) for placing a battery module (500) and a buffer block (300) is provided in the box body (100).

10. The battery pack according to claim 9, characterized in that: The box body (100) further comprises a frame (130) and a cover plate (140); the bottom guard plate (120), the frame (130) and the cover plate (140) are connected to each other to form the sealed placement cavity (110).

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