Battery pack insulation protective cover

Abstract

The invention discloses a battery pack insulation protective cover, and relates to the technical field of lithium batteries, the battery pack insulation protective cover comprises a fence frame, a first protective side plate and a second protective side plate, the first protective side plate and the second protective side plate are symmetrically distributed on the two sides of the fence frame, the upper end and the lower end of the fence frame are each provided with a set of bearing blocks, and the two ends of each bearing block are each provided with a containing groove of an isosceles trapezoid structure; the first protection side plate and the second protection side plate are each provided with two sets of follow-up blocks distributed on the inner side of the containing groove. When a first protection side plate and a second protection side plate are subjected to external impact, an inclined surface of a follow-up block rubs an elastic rubber block I, a stop channel rubs an extending bulge at the same time, and the movement potential energy of the follow-up block can be effectively weakened through the friction movement of the follow-up block, the stop channel, the elastic rubber block I and the extending bulge; therefore, the impact acting force borne by the first protection side plate and the second protection side plate can be effectively reduced, and then the first protection side plate and the second protection side plate can be rapidly reset under the reset springback acting force of the elastic structure.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to an insulating protective cover for a battery pack. Background Art

[0002] The protective cover of lithium battery pack is a key component to ensure the safe, reliable and long-life operation of the battery. After being installed on the outside of the battery pack, the protective cover can prevent external mechanical impact, collision or extrusion from causing damage to the internal structure of the battery, avoiding short circuit, leakage or thermal runaway. At the same time, it can prevent sharp objects from piercing the battery cells, preventing internal short circuit or electrolyte leakage. In vehicles or mobile devices, it reduces the damage to the internal connections and structures of the battery caused by continuous vibration.

[0003] Existing protective covers usually have a certain sealing level to prevent water, dust, salt spray, etc. from invading the battery, avoiding corrosion or short circuits, and blocking external acidic and alkaline substances or corrosive gases from damaging the battery. In addition, some protective covers use thermal conductive materials or structural designs to assist the battery pack in dissipating heat, and can also isolate external heat in extremely high temperature environments.

[0004] The existing insulating protective cover structure for battery packs is mostly assembled or welded by insulating material plates, which can prevent the battery shell from conducting electricity and avoid accidental electric shock or external short circuit. However, the structural strength of such structural protective covers is limited. If the battery pack is subjected to strong impact during operation, the cover body is prone to structural damage. The protective performance of the damaged cover body is greatly weakened, and it is easy to rigidly collide with the battery pack inside it, affecting the safety of the entire cover body and the battery pack. Therefore, the present invention provides a battery pack insulating protective cover to meet the needs. Summary of the invention

[0005] In view of the above problems, the present invention provides an insulating protective cover for a battery pack.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an insulating protective cover for a battery pack, comprising an enclosure frame and a first protective side plate and a second protective side plate symmetrically distributed on both sides of the enclosure frame, a group of receiving blocks are provided at the upper and lower ends of the enclosure frame, and an accommodating groove with an isosceles trapezoidal structure is provided at both ends of the receiving block, and two groups of follower blocks distributed on the inner sides of the accommodating grooves are provided on the first protective side plate and the second protective side plate, and the receiving block is connected to the follower block through a stretchable and resettable elastic structure.

[0007] Both inclined walls of the accommodating groove body are provided with elastic rubber block 1 and elastic rubber block 2 which are distributed from near to far with respect to the first protective side plate or the second protective side plate, the end of the follower block passes over the two elastic rubber blocks 1 and is located on one side of the two elastic rubber blocks 2, the follower block is provided with a stop channel which runs through its two inclined surfaces, the elastic rubber block 1 is provided with an extension protrusion which extends to the inner side of the stop channel, when the first protective side plate and the second protective side plate are subjected to external impact, the follower block moves and hits the elastic rubber block 2, the elastic structure is stretched, and the stop channel rubs the extension protrusion.

[0008] Furthermore, one end of the follower block located in the accommodating groove is in an isosceles trapezoidal structure, and the sides of the elastic rubber block 1 and the elastic rubber block 2 close to the follower block are parallel to the inclined surface of the follower block, and the distance between the farther ends of the two elastic rubber blocks 2 located in the same accommodating groove is equal to the length of the side of the follower block facing the elastic rubber block 2.

[0009] Furthermore, the elastic structure includes a positioning plate arranged at the center position of the receiving block, and intercepting plates extending to the outside of the stopping channel are provided at both ends of the positioning plate, and extension blocks extending into the stopping channel are provided on the intercepting plates, and the extension blocks are connected to the side of the stopping channel close to the second elastic rubber block through a reset spring. When the follower block moves toward the center position of the receiving block, the side of the stopping channel close to the second elastic rubber block pulls the reset spring to deform.

[0010] Furthermore, outer guard plates are provided at the front and rear ends of the enclosure frame, and a plurality of guide cross bars equidistantly distributed from top to bottom are provided on the inner side of the outer guard plates, and a group of first limit sleeve rods and second limit sleeve rods that can move synchronously are respectively sleeved at both ends of the guide cross bars, and the first protective side plate and the second protective side plate are respectively provided with through holes corresponding to the second limit sleeve rod or the first limit sleeve rod.

[0011] Furthermore, each group of the first limiting sleeve rod and the second limiting sleeve rod are connected through expansion plate 1 and expansion plate 2 respectively, and follower rack 1 and follower rack 2 are respectively provided on expansion plate 1 and expansion plate 2, and channels for accommodating the sliding of follower rack 1 and follower rack 2 are opened on the outer guard plate.

[0012] A driving gear and a knob for controlling the rotation of the driving gear are installed on the outer guard plate. The follower rack 1 and the follower rack 2 are respectively engaged with the two sides of the driving gear. When the driving gear rotates, the follower rack 1 and the follower rack 2 can rotate in opposite directions until the first limit sleeve rod and the second limit sleeve rod are inserted into the inner side of the through hole.

[0013] Furthermore, an elastic rubber column is provided between two adjacent first limiting sleeve rods and second limiting sleeve rods, and two groups of channels for accommodating the ends of the elastic rubber column are opened on the inner side of the outer protective plate, and the other end of the elastic rubber column is fixed to the expansion plate one or the expansion plate two.

[0014] Furthermore, the first protective side plate and the second protective side plate are each provided with a plurality of equally spaced protective strips on the outside, and the protective strips are each provided with two supporting feet distributed from top to bottom. The first protective side plate and the second protective side plate are each provided with a plurality of groups of limiting sleeves for accommodating the supporting feet on the side away from the enclosure frame, and the limiting sleeves are connected to the protective strips by a pressure spring, and the pressure spring is located on the outside of the supporting feet.

[0015] Furthermore, the first protective side plate and the second protective side plate are each provided with two limit brackets distributed from top to bottom on the side away from the enclosure frame, the limit brackets are perpendicular to the protective strips, the protective strips are each located in the relative gap between the limit brackets and the first protective side plate or the second protective side plate, and the protective strips are each provided with grooves for accommodating the limit brackets.

[0016] In summary, the technical effects and advantages of the present invention are as follows: 1. When the first protective side plate and the second protective side plate in the present invention are subjected to external impact, the inclined surface of the follower block rubs against the elastic rubber block 1, and the stop channel rubs against the extended protrusion at the same time. The friction movement of the follower block, the stop channel, the elastic rubber block 1 and the extended protrusion can effectively weaken the moving potential energy of the follower block, thereby effectively reducing the impact force suffered by the first protective side plate and the second protective side plate. Subsequently, under the reset rebound force of the elastic structure, the first protective side plate and the second protective side plate can be quickly reset.

[0017] 2. The special structural arrangement of the follower block, the accommodating groove, the elastic rubber block 1 and the elastic rubber block 2 in the present invention can quickly and accurately intercept the follower block, effectively absorb the moving potential energy of the follower block, and avoid the collision between the follower block and the receiving block caused by excessive movement of the first protective side plate and the second protective side plate under a large impact force, thereby improving the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the connection structure between the follower and receiving blocks of the present invention.

[0021] Figure 3 It is a schematic diagram of the structure of the receiving block after being cut open.

[0022] Figure 4 For the present invention Figure 3 Enlarged structural diagram at A in the middle.

[0023] Figure 5 It is a schematic diagram of the position distribution of the enclosure frame, outer guard plate and receiving block of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the outer guard plate after being cut open.

[0025] Figure 7 It is a schematic diagram of the inner structure of the outer guard plate of the present invention.

[0026] Figure 8 It is a schematic diagram of the structure of the first protective side plate and the second protective side plate of the present invention.

[0027] Fig. 9 It is a schematic diagram of the receiving block structure of the present invention.

[0028] Fig.10 For the present invention Figure 8 Enlarged structural diagram at B in the middle.

[0029] In the figure: 1. first protective side plate; 2. second protective side plate; 3. enclosure frame; 4. outer guard plate; 401. guide cross bar; 5. follower block; 501. stop channel; 6. receiving block; 601. accommodating groove; 602. positioning plate; 603. intercepting plate; 604. extension block; 605. reset spring; 7. elastic rubber block 1; 701. extension protrusion; 8. elastic rubber block 2; 9. first limiting sleeve rod; 901. expansion plate 1; 902. follower rack 1; 10. second limiting sleeve rod; 1001. expansion plate 2; 1002. follower rack 2; 11. driving gear; 12. elastic rubber column; 13. protective strip; 14. limiting sleeve; 15. pressure spring; 16. limiting support. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] refer to Figure 1-4An insulating protective cover for a battery pack is shown, comprising an enclosure frame 3 and a first protective side plate 1 and a second protective side plate 2 symmetrically distributed on both sides of the enclosure frame 3. When the enclosure frame 3 is installed on the battery pack, the first protective side plate 1 and the second protective side plate 2 are located on both sides of the battery pack, providing a protective effect.

[0032] In order to connect the first protective side plate 1, the second protective side plate 2 and the enclosure frame 3, a group of receiving blocks 6 are provided at the upper and lower ends of the enclosure frame 3, and both ends of the receiving blocks 6 are provided with accommodating grooves 601 of isosceles trapezoidal structure, and the first protective side plate 1 and the second protective side plate 2 are provided with two groups of follower blocks 5 distributed inside the accommodating grooves 601, and the receiving blocks 6 are connected to the follower blocks 5 through a stretchable and resettable elastic structure. Therefore, when the first protective side plate 1 or the second protective side plate 2 is subjected to a strong external impact force, the follower blocks 5 connected thereto are affected by the impact force to generate movement potential energy, and the elastic structure responds with deformation.

[0033] Both inclined walls of the accommodating groove 601 are provided with elastic rubber block 1 7 and elastic rubber block 2 8 which are distributed from near to far with respect to the first protective side plate 1 or the second protective side plate 2. The end of the follower block 5 passes over the two elastic rubber blocks 1 7 and is located on one side of the two elastic rubber blocks 2 8. The follower block 5 is provided with a stop channel 501 which runs through its two inclined surfaces, and the elastic rubber block 1 7 is provided with an extension protrusion 701 which extends to the inner side of the stop channel 501.

[0034] When the first protective side plate 1 and the second protective side plate 2 are subjected to strong external impact force, the follower block 5 moves and hits the elastic rubber block 2 8, and the elastic structure is stretched. In this process, the inclined surface of the follower block 5 rubs against the elastic rubber block 1 7, and the stop channel 501 rubs against the extension protrusion 701 at the same time. The friction movement of the follower block 5, the stop channel 501, the elastic rubber block 1 7, and the extension protrusion 701 can effectively weaken the movement potential energy of the follower block 5, and thus can effectively reduce the impact force suffered by the first protective side plate 1 and the second protective side plate 2. Subsequently, under the reset rebound force of the elastic structure, the first protective side plate 1 and the second protective side plate 2 can be quickly reset.

[0035] During the above movement process, the impact force from the first protective side plate 1 and the second protective side plate 2 can be effectively buffered, thereby effectively reducing the damage to the first protective side plate 1 and the second protective side plate 2 caused by the impact force, avoiding the impact force from affecting the battery pack, and improving the safety of the battery pack.

[0036] It is worth mentioning that Figure 4As shown, in the present invention, one end of the follower block 5 located in the accommodating groove 601 is in an isosceles trapezoidal structure, and the sides of the elastic rubber block 1 7 and the elastic rubber block 2 8 close to the follower block 5 are parallel to the inclined surface of the follower block 5. The distance between the two elastic rubber blocks 2 8 located in the same accommodating groove 601 at the ends farther apart is equal to the length of the side of the follower block 5 facing the elastic rubber block 2 8.

[0037] Therefore, when the follower block 5 moves to a certain extent in the accommodating groove 601, the two elastic rubber blocks 2 8 can effectively stop the follower block 5 from continuing to slide after being impacted and deformed. Combined with the friction connection between the elastic rubber block 1 7 and the extended protrusion 701 on the follower block 5 and the stop channel 501, the purpose of quickly and accurately stopping the follower block 5 in the moving state can be achieved, and the moving potential energy of the follower block 5 can be effectively absorbed, thereby avoiding the collision between the follower block 5 and the receiving block 6 caused by excessive movement of the first protective side plate 1 and the second protective side plate 2 under the action of a large impact force.

[0038] After the follower block 5 is intercepted, it can be quickly reset under the action of the elastic structure, so as to achieve the purpose of quickly resetting the first protective side plate 1 and the second protective side plate 2, thereby improving the reset speed of the first protective side plate 1 and the second protective side plate 2, so that the first protective side plate 1 and the second protective side plate 2 can be effectively located on the outside of the battery pack for a long time to perform protective operations.

[0039] Specifically, Figure 4 As shown, the elastic structure includes a positioning plate 602 arranged at the center of the receiving block 6, and interception plates 603 extending to the outside of the stop channel 501 are arranged at both ends of the positioning plate 602, and extension blocks 604 extending into the stop channel 501 are arranged on the interception plates 603, and the extension blocks 604 are connected to the side of the stop channel 501 close to the elastic rubber block 2 8 through the reset spring 605. When the follower block 5 moves toward the center of the receiving block 6, the side of the stop channel 501 close to the elastic rubber block 2 8 pulls the reset spring 605 to deform. When the moving potential energy of the follower block 5 is absorbed and the impact force from the first protective side plate 1 and the second protective side plate 2 is effectively buffered, under the action of the reset spring 605, the side of the stop channel 501 close to the elastic rubber block 2 8 and the follower block 5 are quickly reset, thereby enabling the first protective side plate 1 and the second protective side plate 2 to be quickly reset.

[0040] Furthermore, the setting of the intercepting plate 603 can effectively prevent the follower block 5 from being separated from the accommodating groove 601 , and improve the stability of the follower block 5 and the first protective side plate 1 and the second protective side plate 2 during movement.

[0041] Embodiment 2: Based on embodiment 1, Figure 5-7As shown, outer guard plates 4 are provided at both the front and rear ends of the enclosure frame 3, and a plurality of guide cross bars 401 equidistantly distributed from top to bottom are provided on the inner side of the outer guard plates 4, and a group of first limit sleeve rods 9 and second limit sleeve rods 10 that can move synchronously are respectively sleeved at both ends of the guide cross bars 401, and the first protective side plates 1 and the second protective side plates 2 are respectively provided with through holes corresponding to the second limit sleeve rods 10 or the first limit sleeve rods 9.

[0042] In this embodiment, the outer guard plate 4 can be located in front of and behind the enclosure frame 3 to perform protection operations. Combined with the receiving blocks 6 above and below the enclosure frame 3, the structural strength of the enclosure frame 3 can be improved in all directions, and the impact resistance of the enclosure frame 3 can be further improved.

[0043] In the natural state, the first limit sleeve rod 9 and the second limit sleeve rod 10 are both exposed to the inner side of the gap formed by the outer guard plate 4 and the enclosure frame 3, and the first limit sleeve rod 9 and the second limit sleeve rod 10 are both inserted into the inner side of the through hole, which has a limiting effect on the first protective side plate 1 and the second protective side plate 2, and can improve the stability of the first protective side plate 1 and the second protective side plate 2.

[0044] Specifically, each set of first limiting sleeve rods 9 and second limiting sleeve rods 10 are connected through expansion plate 1 901 and expansion plate 2 1001 respectively, and expansion plate 1 901 and expansion plate 2 1001 are respectively provided with follower rack 1 902 and follower rack 2 1002, and the outer guard plate 4 is provided with channels for accommodating the sliding of follower rack 1 902 and follower rack 2 1002.

[0045] A driving gear 11 and a knob for controlling the rotation of the driving gear 11 are installed on the outer guard plate 4. The follower rack 1 902 and the follower rack 2 1002 are respectively engaged with the two sides of the driving gear 11. When the driving gear 11 rotates, the follower rack 1 902 and the follower rack 2 1002 can rotate in opposite directions until the first limiting sleeve rod 9 and the second limiting sleeve rod 10 are inserted into the inner side of the through hole, so as to achieve the purpose of limiting the first protective side plate 1 and the second protective side plate 2.

[0046] The combination of the guide cross bar 401, the first limit sleeve rod 9 and the second limit sleeve rod 10 forms a plurality of laterally distributed columnar support structures on the inner side of the outer guard plate 4 and the enclosure frame 3, thereby improving the impact resistance of the outer guard plate 4 and making it less likely for structural damage to occur at the connection parts between the first limit sleeve rod 9 and the second limit sleeve rod 10 and the first protective side plate 1 and the second protective side plate 2.

[0047] An elastic rubber column 12 is provided between two adjacent first limiting sleeve rods 9 and second limiting sleeve rods 10, and two sets of channels for accommodating the ends of the elastic rubber column 12 are opened on the inner side of the outer protective plate 4, and the other end of the elastic rubber column 12 is fixed to the expansion plate 1 901 or the expansion plate 2 1001.

[0048] When the outer guard plate 4 is subjected to a strong impact force, the setting of the elastic rubber column 12 can provide a supporting force to the portion of the inner side of the outer guard plate 4 where the above-mentioned columnar support structure is not arranged, which can effectively reduce the impact damage suffered by the portion and effectively avoid damage to the weak structural portion of the outer guard plate 4 when it is subjected to a strong impact force.

[0049] Embodiment 3, on the basis of embodiment 1 and embodiment 2, as Figure 8-10 As shown, the first protective side plate 1 and the second protective side plate 2 are each provided with a plurality of equally spaced protective strips 13, and the protective strips 13 are each provided with two supporting feet distributed from top to bottom, and the first protective side plate 1 and the second protective side plate 2 are each provided with a plurality of groups of limiting sleeves 14 for accommodating the supporting feet on the side away from the enclosure frame 3, and the limiting sleeves 14 are connected to the protective strips 13 by a pressure spring 15, and the pressure spring 15 is located on the outside of the supporting feet.

[0050] If the first protective side panel 1 and the second protective side panel 2 are subjected to a slight impact force from the outside during operation, the support feet of the outer protective strips 13 can slide inside the limiting sleeve 14, and the elastic potential energy of the pressure spring 15 can effectively absorb the impact force, thereby reducing the impact of the slight impact force on the first protective side panel 1 and the second protective side panel 2, and maintaining the stability of the first protective side panel 1 and the second protective side panel 2. The independent arrangement of multiple protective strips 13 can independently buffer the slight impact force from different positions on the outside of the first protective side panel 1 and the second protective side panel 2, thereby avoiding interference between the protective strips 13.

[0051] Furthermore, in order to prevent the legs of the protection strip 13 from being separated from the limiting sleeve 14, two limit brackets 16 are provided on the side of the first protection side plate 1 and the second protection side plate 2 away from the enclosure frame 3, and the limit brackets 16 are perpendicular to the protection strip 13. The protection strips 13 are located in the relative gap between the limit brackets 16 and the first protection side plate 1 or the second protection side plate 2, and the protection strips 13 are provided with grooves for accommodating the limit brackets 16. The limit brackets 16 can restrict all the protection strips 13 to maintain the stability of the protection strips 13.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack insulation protection cover, comprising an enclosure frame (3) and a first protection side plate (1) and a second protection side plate (2) symmetrically distributed on both sides of the enclosure frame (3), characterized in that: A group of receiving blocks (6) are provided at the upper and lower ends of the enclosure frame (3), and a receiving groove (601) with an isosceles trapezoidal structure is provided at both ends of the receiving block (6), and two groups of follower blocks (5) are provided on the first protective side plate (1) and the second protective side plate (2) and are distributed inside the receiving groove (601), and the receiving block (6) is connected to the follower block (5) via a stretchable and resetting elastic structure; Both inclined walls of the receiving groove (601) are provided with elastic rubber block 1 (7) and elastic rubber block 2 (8) which are distributed from near to far with respect to the first protective side plate (1) or the second protective side plate (2); the end of the follower block (5) passes over the two elastic rubber blocks 1 (7) and is located on one side of the two elastic rubber blocks 2 (8); the follower block (5) is provided with a stop channel (501) which passes through the two inclined surfaces thereof; the elastic rubber block 1 (7) is provided with an extension protrusion (701) which extends to the inner side of the stop channel (501); when the first protective side plate (1) or the second protective side plate (2) is subjected to an external impact, the follower block (5) moves to collide with the elastic rubber block 2 (8), the elastic structure is stretched, and the stop channel (501) rubs against the extension protrusion (701).

2. The battery pack insulation protective cover according to claim 1, characterized in that: The end of the follower block (5) located in the accommodating groove (601) is in an isosceles trapezoidal structure, the sides of the elastic rubber block (7) and the elastic rubber block (8) close to the follower block (5) are parallel to the inclined surface of the follower block (5), and the distance between the two elastic rubber blocks (8) located in the same accommodating groove (601) at the ends far away from each other is equal to the length of the side of the follower block (5) facing the elastic rubber block (8).

3. The battery pack insulation protective cover according to claim 2, characterized in that: The elastic structure comprises a locking plate (602) arranged at the center position of the receiving block (6), and interception plates (603) extending to the outside of the stop channel (501) are arranged at both ends of the locking plate (602), and extension blocks (604) extending into the stop channel (501) are arranged on the interception plates (603), and the extension blocks (604) are connected to a side of the stop channel (501) close to the second elastic rubber block (8) through a return spring (605). When the follower block (5) moves toward the center position of the receiving block (6), the side of the stop channel (501) close to the second elastic rubber block (8) pulls the return spring (605) to deform.

4. The battery pack insulation protective cover according to claim 1, characterized in that: The front and rear ends of the enclosure frame (3) are each provided with an outer guard plate (4), the inner side of the outer guard plate (4) is provided with a plurality of guide cross bars (401) equidistantly distributed from top to bottom, the two ends of the guide cross bars (401) are each sleeved with a group of first limit sleeve rods (9) and second limit sleeve rods (10) that can move synchronously, and the first protective side plate (1) and the second protective side plate (2) are each provided with a through hole corresponding to the second limit sleeve rod (10) or the first limit sleeve rod (9).

5. The battery pack insulation protection cover according to claim 4, characterized in that: Each group of the first limiting sleeve rod (9) and the second limiting sleeve rod (10) are connected via expansion plate 1 (901) and expansion plate 2 (1001), respectively; the expansion plate 1 (901) and expansion plate 2 (1001) are provided with follower rack 1 (902) and follower rack 2 (1002), respectively; and the outer guard plate (4) is provided with a channel for accommodating the sliding movement of the follower rack 1 (902) and the follower rack 2 (1002); The outer guard plate (4) is mounted with a driving gear (11) and a knob capable of controlling the rotation of the driving gear (11); the follower rack (902) and the follower rack (1002) are respectively engaged with two sides of the driving gear (11); when the driving gear (11) rotates, the follower rack (902) and the follower rack (1002) can rotate in opposite directions until the first limiting sleeve rod (9) and the second limiting sleeve rod (10) are inserted into the inner side of the through hole.

6. The battery pack insulation protective cover according to claim 5, characterized in that: An elastic rubber column (12) is provided between two adjacent first limiting sleeve rods (9) and second limiting sleeve rods (10), and two groups of channels capable of accommodating the ends of the elastic rubber column (12) are provided on the inner side of the outer protective plate (4), and the other end of the elastic rubber column (12) is fixed to the first expansion plate (901) or the second expansion plate (1001).

7. The battery pack insulation protective cover according to claim 1, characterized in that: The first protective side plate (1) and the second protective side plate (2) are both provided with a plurality of protective strips (13) distributed at equal intervals outside, and the protective strips (13) are both provided with two supporting feet distributed from top to bottom. The first protective side plate (1) and the second protective side plate (2) are both provided with a plurality of limiting sleeves (14) capable of accommodating the supporting feet on the side away from the enclosure frame (3), and the limiting sleeves (14) are connected to the protective strips (13) via pressure springs (15), and the pressure springs (15) are located on the outside of the supporting feet.

8. The battery pack insulation protective cover according to claim 7, characterized in that: Two limit brackets (16) are arranged from top to bottom on the side of the first protective side plate (1) and the second protective side plate (2) away from the enclosure frame (3); the limit brackets (16) are perpendicular to the protective strips (13); the protective strips (13) are located in the relative gap between the limit brackets (16) and the first protective side plate (1) or the second protective side plate (2); and the protective strips (13) are provided with grooves for accommodating the limit brackets (16).

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