Protective structure of lithium battery pack

Abstract

The utility model relates to the technical field of lithium battery pack protection, and discloses a protection structure of a lithium battery pack, which comprises a box cover, a box body and a buckling assembly, a sealing ring extending downwards is arranged on the box cover; a quick release assembly for quickly mounting the sealing ring is arranged between the sealing ring and the box cover; the box body comprises an upper box and a lower box; the upper box is rotationally connected to the lower portion of the box cover, and the upper box is tightly connected with the sealing ring. The lower box is arranged below the upper box, and a waterproof layer which is detachably connected with the upper box is arranged between the lower box and the upper box; the buckling assembly comprises four sets of buckling pieces distributed in the circumferential direction. One end of the fastener is connected to the top end of the lower box, and the other end of the fastener is clamped to the bottom end of the upper box.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery pack protection technology, specifically a protective structure for lithium battery packs. Background Technology

[0002] Lithium battery packs can be connected in series or in parallel. Parallel lithium battery packs require each battery to have the same voltage, and the output voltage is equal to the voltage of one battery. Parallel lithium battery packs can provide a stronger current, while series lithium battery packs do not have as many requirements.

[0003] Currently, in lithium battery pack production, a protective structure is typically installed on the outside of the battery pack to extend its lifespan. With rapid technological advancements, to better protect the lithium battery pack, a waterproof mechanism is often incorporated within the protective structure. This waterproof design usually employs an integrated encapsulation method, completely encasing the lithium battery pack and its related components within a waterproof mechanism to prevent water from seeping into the battery pack and ensuring its normal operation. However, the aforementioned protective structure and its internal waterproof mechanism are often integrated. Over time, the waterproof mechanism may age, necessitating the replacement of the entire protective structure and increasing maintenance costs.

[0004] Therefore, there is an urgent need for a protective structure for lithium battery packs to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a protective structure for lithium battery packs, so as to solve the problem that the existing protective structures require the replacement of the entire protective structure when replacement, which increases maintenance costs.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A protective structure for a lithium battery pack includes a cover, a housing, and a fastening assembly. The cover has a downwardly extending sealing ring. A quick-release assembly for quickly installing the sealing ring is provided between the sealing ring and the cover. The housing includes an upper housing and a lower housing. The upper housing is rotatably connected to the bottom of the cover and is tightly connected to the sealing ring. The lower housing is located below the upper housing and has a detachably connected waterproof layer between it and the upper housing. The fastening assembly includes four sets of circumferentially distributed fasteners. One end of each fastener is connected to the top of the lower housing, and the other end is engaged with the bottom of the upper housing.

[0008] As a preferred embodiment of the protective structure for a lithium battery pack, the top of the lower casing is provided with a mounting groove corresponding to the fastener; a rotating shaft is provided between the fastener and the mounting groove.

[0009] As a preferred embodiment of the protective structure for a lithium battery pack, one end of the buckle is provided with an outwardly protruding rotating part; the rotating part is connected to the mounting groove via a rotating shaft; the other end of the buckle is provided with a snap-fit ​​part; and the upper box is provided with a snap-fit ​​groove corresponding to the snap-fit ​​part.

[0010] As a preferred embodiment of the protective structure for a lithium battery pack, the latching part is made of an elastic material and has a V-shaped structure; the end of the latching part away from the buckle is provided with an outwardly extending actuating part.

[0011] As a preferred embodiment of the protective structure for a lithium battery pack, the sealing ring has outwardly extending fixing portions on both sides, and the fixing portions and the sealing ring form a stepped structure; the fixing portions are located between the quick-release assembly and the cover.

[0012] As a preferred embodiment of the protective structure for a lithium battery pack, the quick-release assembly includes a fixing plate; both ends of the fixing plate are provided with outwardly protruding sliding portions; the sliding portions are slidably connected to the cover; the top surface of the fixing portion is flush with the bottom surface of the cover, and the bottom surface of the fixing plate is flush with the top surface of the fixing portion.

[0013] As a preferred embodiment of the protective structure for a lithium battery pack, the cover is provided with a groove corresponding to the sliding part; a fixing layer is provided at one end of the groove near the fixing part, and the inner side of the fixing layer is tightly connected to the outer surface of the sliding part.

[0014] As a preferred embodiment of the protective structure for a lithium battery pack, the cover has a positioning component in the center for pressing the lithium battery pack; the positioning component is located inside the sealing ring.

[0015] As a preferred embodiment of the protective structure for a lithium battery pack, the positioning component includes a first mounting plate, a second mounting plate, a guide post, and a buffer spring; the first mounting plate is fixedly connected inside the cover; the second mounting plate is slidably connected to the first mounting plate via the guide post; the buffer spring is sleeved on the guide post and located between the first mounting plate and the second mounting plate; a first protective layer is provided on the second mounting plate.

[0016] As a preferred embodiment of the protective structure for a lithium battery pack, a second protective layer is provided inside the waterproof layer; the second protective layer is fixedly connected to the lower casing.

[0017] The beneficial effects of this utility model are as follows:

[0018] By incorporating fastening and quick-release components, the sealing ring and waterproof layer are modularly designed, allowing for independent replacement of both. This avoids the need to replace the entire protective structure due to aging, reducing costs. Furthermore, by moving the fixing plate of the quick-release component to the left or right, it moves away from or closer to the sealing ring, enabling rapid installation and removal of the sealing ring and simplifying the removal process. Additionally, by detaching the clips from the upper casing, the upper and lower casings can be disassembled, facilitating the removal and replacement of the waterproof layer from the lower casing. This simplifies the waterproof layer removal process and improves the efficiency of component replacement within the protective structure, shortening replacement time. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a protective structure for a lithium battery pack provided by this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the fastening assembly provided by this utility model;

[0021] Figure 3 A schematic diagram of the overall structure of the box lid provided by this utility model;

[0022] Figure 4 A schematic diagram of the overall structure of the positioning component provided by this utility model;

[0023] Figure 5 A partial structural diagram of the box provided by this utility model.

[0024] The following are the labeling elements in the figure:

[0025] 10. Case lid; 11. Sealing ring; 111. Fixing part; 12. Quick release assembly; 121. Fixing plate; 13. Positioning assembly; 131. First mounting plate; 132. Second mounting plate; 133. Guide post; 134. Buffer spring; 135. First protective layer; 14. Slide groove; 20. Upper case; 201. Slot; 30. Lower case; 301. Mounting groove; 40. Fastener; 401. Snap-fit ​​part; 402. Rotating part; 403. Actuating part; 50. Waterproof layer; 51. Second protective layer. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.

[0030] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0031] In one embodiment of this utility model, such as Figure 1-5 As shown, a protective structure for a lithium battery pack is provided, including a cover 10, a housing, and a fastening assembly. The cover 10 has a downwardly extending sealing ring 11. A quick-release assembly 12 for quickly installing the sealing ring 11 is provided between the sealing ring 11 and the cover 10. The housing includes an upper housing 20 and a lower housing 30. The upper housing 20 is rotatably connected to the underside of the cover 10 and is tightly connected to the sealing ring 11. The lower housing 30 is located below the upper housing 20 and has a detachably connected waterproof layer 50 between it and the upper housing 20. The fastening assembly includes four sets of circumferentially distributed latches 40. One end of each latch 40 is connected to the top of the lower housing 30, and the other end is latched to the bottom of the upper housing 20.

[0032] By setting up a fastening assembly and a quick-release assembly 12, the sealing ring 11 and the waterproof layer 50 are modularly designed, allowing them to be replaced independently. This avoids the need to replace the entire protective structure due to aging, reducing costs. At the same time, by moving the fixing plate 121 of the quick-release assembly 12 to the left or right, the fixing plate 121 of the quick-release assembly 12 can be moved away from or closer to the sealing ring 11, thus enabling quick installation and removal of the sealing ring 11 and simplifying the removal steps. Furthermore, by detaching the buckle 40 from the upper box 20, the upper box 20 and the lower box 30 can be disassembled, making it easier to remove the waterproof layer 50 from the lower box 30 for replacement. This simplifies the removal steps of the waterproof layer 50, thereby improving the replacement efficiency of components in the protective structure and shortening the replacement time.

[0033] Preferably, the lower box 30 has a mounting groove 301 corresponding to the fastener 40 at its top. A pivot is provided between the fastener 40 and the mounting groove 301. One end of the fastener 40 has an outwardly protruding rotating part 402. The rotating part 402 is connected to the mounting groove 301 via the pivot. The other end of the fastener 40 has a snap-fit ​​part 401. The upper box 20 has a slot 201 corresponding to the snap-fit ​​part 401. By providing the rotating part 402 and the snap-fit ​​part 401, the rotating part 402 allows one end of the fastener 40 to be stably fixed in the lower box 30, and by rotating the fastener 40, the snap-fit ​​part 401 at its other end snaps into the slot 201 of the upper box 20, thereby achieving quick installation and fixing between the upper box 20 and the lower box 30, simplifying the installation steps. When the waterproof layer 50 needs to be replaced, the snap-fit ​​part 401 can be detached from the slot 201 to complete the quick disassembly between the two. Then the waterproof layer 50 can be taken out from the lower box 30 and replaced, so that the waterproof layer 50 can be replaced separately without replacing the entire protective structure.

[0034] Furthermore, the latching part 401 is made of elastic material and has a V-shaped structure. An outwardly extending actuating part 403 is provided at the end of the latching part 401 away from the buckle 40. By providing the actuating part 403, the user can easily compress the latching part 401, allowing it to be removed from the slot 201, thus reducing the disassembly time between the upper box 20 and the lower box 30.

[0035] Preferably, both sides of the sealing ring 11 are provided with outwardly extending fixing portions 111, forming a stepped structure between the fixing portions 111 and the sealing ring 11. The fixing portions 111 are located between the quick-release assembly 12 and the cover 10. The quick-release assembly 12 allows for quick fixing and installation of the fixing portions 111 of the sealing ring 11, simplifying the installation steps of the sealing ring 11 and facilitating subsequent quick disassembly of the sealing ring 11. This enables independent replacement of the sealing ring 11 without the need for complete replacement of the protective structure.

[0036] Specifically, the quick-release assembly 12 includes a fixing plate 121. Both ends of the fixing plate 121 have outwardly protruding sliding portions. These sliding portions are slidably connected to the cover 10. The top surface of the fixing portion 111 is flush with the bottom surface of the cover 10, and the bottom surface of the fixing plate 121 is flush with the top surface of the fixing portion 111. By setting the fixing plate 121 and moving its position, the fixing plate 121 can quickly fix and disassemble the fixing portion 111 on the sealing ring 11, facilitating independent replacement of the sealing ring 11 without requiring a complete replacement of the protective structure.

[0037] Furthermore, the cover 10 is provided with a groove 14 corresponding to the sliding part. A fixing layer is provided at one end of the groove 14 near the fixing part 111, and the inner side of the fixing layer is tightly connected to the outer surface of the sliding part. In this embodiment, the fixing layer can be a rubber layer or a sponge layer. The tight connection between the fixing layer and the sliding part allows the fixing plate 121 to press against both sides of the sliding part when the fixing plate 121 moves above the fixing part 111, preventing the sliding part from easily shifting. This ensures that the fixing plate 121 is firmly fixed to the groove 14 at the end near the fixing part 111, guaranteeing the stable installation of the sealing ring 11.

[0038] Preferably, the cover 10 has a positioning component 13 for pressing the lithium battery pack in the center. The positioning component 13 is located inside the sealing ring 11. By setting the positioning component 13, when the cover 10 is closed with the housing, the top of the lithium battery pack is fixed by the positioning component 13, ensuring that the lithium battery pack can be stably fixed in the protective structure, avoiding shaking of the lithium battery pack and improving the stability of the lithium battery pack.

[0039] Specifically, the positioning component 13 includes a first mounting plate 131, a second mounting plate 132, a guide post 133, and a buffer spring 134. The first mounting plate 131 is fixedly connected to the inside of the cover 10. The second mounting plate 132 is slidably connected to the first mounting plate 131 via the guide post 133. The buffer spring 134 is sleeved on the guide post 133 and located between the first mounting plate 131 and the second mounting plate 132. The second mounting plate 132 is provided with a first protective layer 135. When the lithium battery pack is fixed, under the action of the guide post 133 and the buffer spring 134, the second mounting plate 132 drives the first protective layer 135 to be fixed towards the inside of the lithium battery pack, so that the lithium battery pack can be stably fixed in the box, thereby improving the stability of the lithium battery pack.

[0040] Preferably, a second protective layer 51 is provided inside the waterproof layer 50. The second protective layer 51 is fixedly connected to the lower casing 30. By providing the second protective layer 51, the bottom and sides of the lithium battery pack are protected and fixed, improving the stability and service life of the lithium battery pack. Furthermore, the waterproof layer 50 provides a certain degree of waterproofing to the protective structure, preventing water from entering the protective structure and thus improving the service life of the lithium battery pack.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A protective structure for a lithium battery pack, characterized in that, include: A box lid, wherein a downwardly extending sealing ring is provided on the box lid; a quick-release assembly for quickly installing the sealing ring is provided between the sealing ring and the box lid; The box body includes an upper box and a lower box; the upper box is rotatably connected to the bottom of the box cover and is tightly connected to the sealing ring; the lower box is located below the upper box and is provided with a detachable waterproof layer between it and the upper box; The fastening assembly includes four sets of circumferentially distributed fasteners; one end of each fastener is connected to the top of the lower box, and the other end is engaged with the bottom of the upper box.

2. The protective structure of the lithium battery pack according to claim 1, characterized in that, The top of the lower box is provided with a mounting groove corresponding to the buckle; a rotating shaft is provided between the buckle and the mounting groove.

3. The protective structure of the lithium battery pack according to claim 2, characterized in that, One end of the fastener has an outwardly protruding rotating part; the rotating part is connected to the mounting groove via a rotating shaft; the other end of the fastener has a snap-fit ​​part; the upper box has a snap-fit ​​groove corresponding to the snap-fit ​​part.

4. The protective structure of the lithium battery pack according to claim 3, characterized in that, The latching part is made of elastic material and has a V-shaped structure; the end of the latching part away from the buckle is provided with an outwardly extending actuating part.

5. The protective structure of the lithium battery pack according to claim 1, characterized in that, Both sides of the sealing ring are provided with outwardly extending fixing parts, and the fixing parts and the sealing ring form a stepped structure; the fixing parts are located between the quick-release assembly and the box cover.

6. The protective structure of the lithium battery pack according to claim 5, characterized in that, The quick-release assembly includes a fixing plate; both ends of the fixing plate are provided with outwardly protruding sliding portions; the sliding portions are slidably connected to the box cover; the top surface of the fixing portion is flush with the bottom surface of the box cover, and the bottom surface of the fixing plate is flush with the top surface of the fixing portion.

7. The protective structure of the lithium battery pack according to claim 6, characterized in that, The lid is provided with a groove corresponding to the sliding part; a fixing layer is provided at one end of the groove near the fixing part, and the inner side of the fixing layer is tightly connected to the outer surface of the sliding part.

8. The protective structure of the lithium battery pack according to any one of claims 1-7, characterized in that, The lid has a positioning component in the center for pressing the lithium battery pack; the positioning component is located inside the sealing ring.

9. The protective structure of the lithium battery pack according to claim 8, characterized in that, The positioning assembly includes a first mounting plate, a second mounting plate, a guide post, and a buffer spring; the first mounting plate is fixedly connected inside the box cover; the second mounting plate is slidably connected to the first mounting plate via the guide post; the buffer spring is sleeved on the guide post and located between the first mounting plate and the second mounting plate; the second mounting plate is provided with a first protective layer.

10. The protective structure for a lithium battery pack according to any one of claims 1-7, characterized in that, The waterproof layer has a second protective layer inside; the second protective layer is fixedly connected to the lower box.

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