Insulation protection devices and battery modules

Abstract

The application relates to the technical field of battery safety, and discloses an insulation protection device and a battery module. The insulation protection device comprises an insulation cover, the insulation cover is configured to cover the bar piece, a connecting hole is formed in the center of the insulation cover; an insulation deformable piece is formed into a ring shape with an inner circumferential edge and an outer circumferential edge; and a connecting piece is arranged to be connected to the bar piece through the connecting hole and the center hole. The insulation cover has an insulation function. When the bar piece and the insulation protection device are simultaneously subjected to vibration, the insulation protection device will not be separated from the bar piece. When the connection between the bar piece and the battery cell fails, the bar piece is separated from the battery cell, the insulation protection device moves together with the bar piece, and when the separated bar piece touches another bar piece which has not been separated, the conductive part between the two bar pieces will not be in contact due to the arrangement of the insulation protection device, so that a short circuit accident will not occur, and the battery module is thus prevented from being damaged.

Description

Technical Field

[0001] This invention relates to the field of battery safety technology, specifically to an insulation protection device and a battery module. Background Technology

[0002] With the development of the new energy industry, battery modules are needed in fields such as energy storage, communications, and electric vehicles. The cells in these modules typically require aluminum electrodes with good conductivity for connection. In existing technologies known to the inventor, the aluminum electrodes are spot-welded to the cells. However, due to factors such as oxidation or impurities at the welding point, inappropriate welding temperature, improper welding methods, excessive welding pressure, or improper selection of the spot welding machine, incomplete welds can occur between the aluminum electrodes and the cells. This incomplete weld is generally not visible to the naked eye. During the use of the battery module, due to these incomplete welds, vibrations can cause the electrodes to detach from the cells. If a detached electrode moves freely and comes into contact with another electrode, a short circuit can occur, severely damaging the battery module. Summary of the Invention

[0003] The purpose of this invention is to overcome the problem of short circuits caused by the detachment of battery contacts in the prior art, and to provide an insulation protection device and a battery module. The insulation protection device has the function of preventing short circuits in the battery caused by electrical connection between battery contacts.

[0004] To achieve the above objectives, the present invention provides an insulating protective device, comprising: an insulating cover configured to cover a bar sheet, the insulating cover having a connecting hole in its center; an insulating deformable member formed as an annular shape having an inner circumference and an outer circumference, the insulating deformable member being fixed to the side of the insulating cover facing the bar sheet by the outer circumference, and the central hole of the insulating deformable member being coaxial with the connecting hole, the diameter of the central hole being smaller than the diameter of the connecting hole; and a connector configured to pass through the connecting hole and the central hole and connect to the bar sheet, and to stretch and fix the inner circumference of the insulating deformable member to the top surface of the bar sheet.

[0005] Preferably, the insulating deformable member includes a pressure ring disposed on the inner periphery, a fixing ring disposed on the outer periphery, and a telescopic membrane connected between the pressure ring and the fixing ring; and / or, the connector includes a rod and a head, the head being connected to one end of the rod, the end of the rod opposite to the head having an external thread for threaded connection with the plate, the diameter of the head being smaller than the diameter of the connecting hole and larger than the diameter of the central hole, the diameter of the rod being smaller than the diameter of the central hole, and when the connector is threadedly connected to the plate, the bottom end face of the head can press the inner periphery of the insulating deformable member against the top surface of the plate.

[0006] Preferably, the head is flush with the top surface of the insulating cover, or the head is recessed into the connection hole; and / or, the insulating protective device further includes an insulating plug connected to the insulating cover, and the insulating plug seals the connection hole and covers the head.

[0007] Preferably, the insulating cover includes an insulating shell, a connection hole is formed on the insulating shell, and an accommodating space is formed between the insulating shell and the bar plate, the accommodating space being able to accommodate the coil electrically connected to the bar plate.

[0008] Preferably, the insulating shell includes an upper plate and a first side plate and a second side plate extending downward from both sides of the upper plate, the upper plate being capable of covering the bar sheet, the bottom end surfaces of the first side plate and the second side plate being capable of contacting the top surface of the bar sheet, and the accommodating space being defined by the bottom surface of the upper plate, the top surface of the bar sheet, and the inner surfaces of the first side plate and the second side plate; and / or, the insulating shell further includes two insulating telescopic members, the insulating telescopic members being respectively disposed on both sides of the insulating shell, the insulating shell being used to cover the middle part of the bar sheet, and the insulating telescopic members being used to cover the sides of the bar sheet.

[0009] Preferably, the insulating expandable member includes a first connecting structure for connecting to the insulating shell, a second connecting structure for connecting to the end edge of the plate, and an insulating film connected between the first connecting structure and the second connecting structure.

[0010] Preferably, the first connecting structure includes a rotating shaft, which is rotatably connected to the insulating shell, and the insulating film is wound on the rotating shaft. The rotating shaft can switch the insulating film between a wound state and an unfolded state by rotating; and / or, the second connecting structure includes a middle buckle and an edge buckle, the middle buckle can cover the edge of the strip, and the edge buckle can connect to the corner of the strip and cover the corner of the strip.

[0011] Preferably, the side buckle is provided with a slot, which can be engaged at the corner of the strip; and / or, the insulation protection device further includes a locking structure, which has a locked state and an unlocked state. In the locked state, the locking structure locks the rotating shaft to the insulating shell, and in the unlocked state, the locking structure releases the locking relationship between the rotating shaft and the insulating shell.

[0012] Preferably, the locking structure includes a locking groove and a locking block. The locking groove is formed on the insulating shell, and the locking block is disposed on the rotating shaft. In the locked state, the locking block is inserted into the locking groove, and in the unlocked state, the locking block is withdrawn from the locking groove.

[0013] A second aspect of the present invention provides a battery module, including a battery plate, a coil, a battery cell, and the aforementioned insulating protective device, wherein the insulating protective device is connected to the battery plate, and the coil and the battery cell are both electrically connected to the battery plate.

[0014] Through the above technical solution, the insulating cover is connected to the battery cell. The insulating cover has an insulating function. When the battery cell and the insulating protective device are vibrated at the same time, the insulating protective device will not detach from the battery cell due to the firm connection between the insulating protective device and the battery cell. When the connection between the battery cell and the battery cell fails, the battery cell will detach from the battery cell, and the insulating protective device will move together with the battery cell. When the detached battery cell touches another detached battery cell, the conductive parts between the two battery cells will not come into contact due to the setting of the insulating protective device, so that the two battery cells will not be electrically connected, and a short circuit accident will not occur, thus avoiding damage to the battery module. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the insulation protection device of the present invention, excluding the connection structure;

[0016] Figure 2 yes Figure 1 Another structural diagram from a different angle;

[0017] Figure 3 This is a structural diagram showing the fit between the insulating shell, the insulating deformable part, and the first connecting structure.

[0018] Figure 4 yes Figure 3 A magnified view of part A in the image;

[0019] Figure 5 This is a schematic diagram of the insulating shell structure;

[0020] Figure 6 yes Figure 5 Another structural diagram;

[0021] Figure 7 This is a structural schematic diagram of an insulating deformable component;

[0022] Figure 8 This is a structural schematic diagram of an insulated expandable component;

[0023] Figure 9 This is a structural diagram of the insulated expandable component excluding the first connecting structure;

[0024] Figure 10 This is a schematic diagram of the first connection structure;

[0025] Figure 11 This is a schematic diagram of the structure of the insulating protective device of the present invention in conjunction with the pad, coil and conductor;

[0026] Figure 12 yes Figure 11 Another structural diagram;

[0027] Figure 13 yes Figure 11The main view;

[0028] Figure 14 yes Figure 13 Perspective view; and

[0029] Figure 15 This is a schematic diagram of the battery module of the present invention.

[0030] Explanation of reference numerals in the attached figures

[0031] 1. Insulating shell; 11. Connecting hole; 12. Elongated hole; 13. Locking groove; 14. Clearance groove; 15. Top plate; 16. First side plate; 17. Second side plate; 18. Protrusion; 19. Rotating hole; 2. Connector; 3. Insulating deformable part; 31. Center hole; 32. Pressure ring; 33. Fixing ring; 34. Telescopic membrane; 4. Insulating telescopic part; 41. First connecting structure; 411. Rotating shaft; 412. Rotating part; 4121. Rotating groove; 42. Second connecting structure; 421. Middle buckle; 422. Side buckle; 43. Insulating membrane; 51. Locking block; 6. Bracket; 10. Bar plate; 20. Wire reel; 30. Wire; 40. Battery cell. Detailed Implementation

[0032] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0033] See Figures 1 to 14 As shown, the present invention provides an insulating protective device, comprising: an insulating cover configured to cover a strip 10, wherein a connecting hole 11 is provided in the center of the insulating cover; an insulating deformable member 3, which is formed as an annular shape having an inner circumference and an outer circumference, the insulating deformable member 3 being fixed to the side of the insulating cover facing the strip 10 by the outer circumference, and the central hole 31 of the insulating deformable member 3 being coaxial with the connecting hole 11, wherein the diameter of the central hole 31 is smaller than the diameter of the connecting hole 11; and a connector 2, which is configured to pass through the connecting hole 11 and the central hole 31 to connect to the strip 10, and to stretch and fix the inner circumference of the insulating deformable member 3 to the top surface of the strip 10.

[0034] In this embodiment, the connector 2 passes through the connection hole 11 of the insulating cover and connects to the battery strip 10. By adding the connector 2, the connection between the insulating cover and the battery strip 10 is strengthened, so that the insulating cover and the battery strip 10 can form a whole. When the connection between the battery strip 10 and the battery cell 40 fails due to vibration, the battery strip 10 falls off the battery cell 40. The insulating cover and the battery strip 10 move together. When the battery strip 10 that has detached from the battery cell 40 touches the battery strip 10 that has not detached from the battery cell 40, the conductive parts between the two battery strips 10 will not come into contact due to the presence of the insulating cover. This ensures that the two battery strips 10 are insulated from each other, avoids electrical connection between the two battery strips 10, thereby reducing the risk of short circuit and leakage, protecting the battery cell and improving the safety of the battery module.

[0035] Connector 2 is connected to the insulating cover via insulating deformable part 3. Insulating deformable part 3 has elastic deformation properties. The insulating cover can connect multiple sizes of tabs 10 through the insulating deformable part 3. The greater the depth of connector 2 into the connecting hole 11, the greater the stretching of insulating deformable part 3; conversely, the smaller the depth of connector 2 into the connecting hole 11, the smaller the stretching of insulating deformable part 3. Insulating deformable part 3 also has an insulating function. When part of connector 2 is made of conductive material, after stretching, that part of connector 2 is located inside insulating deformable part 3. That is, the conductive part of connector 2 is isolated from the outside through insulating deformable part 3, achieving insulation and preventing tabs 10 from contacting the conductive part of connector 2, thereby avoiding short circuits or other circuit problems.

[0036] Specifically, the insulation protection device has a symmetrical structure.

[0037] See Figures 1 to 14 As shown, in one embodiment of the present invention, the insulating deformable member 3 includes a pressure ring 32 disposed on the inner periphery, a fixing ring 33 disposed on the outer periphery, and a stretching membrane 34 connecting the pressure ring 32 and the fixing ring 33.

[0038] In this embodiment, the stretch membrane 34 has elastic and insulating properties. The stretch membrane 34 is flexible, allowing for a wider stretching range. The connector 2 stretches the stretch membrane 34 towards the bar sheet 10 via the pressure ring 32. The pressure ring 32 is made of a rigid material to prevent deformation of the inner circumference due to the stretching of the stretch membrane 34, thus preventing the diameter of the central hole 31 from increasing. This prevents the connector 2 from passing through the central hole 31 and hindering the stretching of the stretch membrane 34, ensuring that the connector 2 can smoothly stretch the stretch membrane 34 via the pressure ring 32. The fixing ring 33 is connected to the side of the insulating cover facing the bar sheet 10, with its outer circumference located between the fixing ring 33 and the insulating cover. The fixing ring 33 is used to fix the insulating membrane 43 to the insulating cover. The fixing ring 33 is also made of a rigid material to prevent deformation of the outer circumference due to the stretching of the stretch membrane 34, thus preventing the stretch membrane 34 from falling off the insulating cover and ensuring a firm connection between the stretch membrane 34 and the insulating cover.

[0039] Specifically, the stretch membrane 34 is annular.

[0040] See Figures 1 to 14 As shown, in one embodiment of the present invention, the connector 2 includes a rod and a head. The head is connected to one end of the rod. The end of the rod opposite to the head is formed with an external thread for threaded connection with the bar plate 10. The diameter of the head is smaller than the diameter of the connecting hole 11 and larger than the diameter of the central hole 31. The diameter of the rod is smaller than the diameter of the central hole 31. When the connector 2 is threadedly connected to the bar plate 10, the bottom end face of the head can press the inner circumference of the insulating deformable member 3 against the top surface of the bar plate 10.

[0041] In this embodiment, the connector 2 is threadedly connected to the bar sheet 10, making the connection more secure. The threaded connection is also detachable, allowing the entire insulating protective device to be removed from the bar sheet 10 for replacement or maintenance, making operation convenient. When the connector 2 is connected to the bar sheet 10, the bottom surface of the head of the connector 2 presses against the upper surface of the pressure ring 32. Both the bottom surface of the head and the upper surface of the pressure ring 32 are flat, allowing them to fit together and preventing the pressure ring 32 from detaching from the connector 2. This ensures the secure connection between the connector 2 and the insulating deformable part 3, and consequently, the secure connection between the connector 2 and the insulating cover. The entire head is located below the connecting hole 11, or one end of the head near the rod is located below the connecting hole 11, so that the bottom surface of the head can press against the pressure ring 32 to the maximum extent.

[0042] Specifically, connector 2 is a bolt of M6 or smaller. Connector 2 can be made of insulating material or conductive material. The head of connector 2 is cylindrical, and both the connecting hole 11 and the central hole 31 are circular holes. The diameter of the central hole 31 is 0.5 mm larger than the diameter of the rod of connector 2.

[0043] Specifically, the center of the bar plate 10 is provided with a threaded hole, and the connecting hole 11 and the center hole 31 are coaxial with the threaded hole. The rod of the connector 2 passes through the connecting hole 11 and the center hole 31 in sequence and is threadedly connected to the threaded hole.

[0044] In another embodiment, the connector 2 includes a rod, a head, and an annular boss. The head is connected to one end of the rod, and the annular boss is arranged around the rod and axially spaced from the head. The end of the rod opposite to the head has an external thread for threaded connection with the plate 10. The diameter of the head is smaller than the diameter of the connecting hole 11, the diameter of the rod is smaller than the diameter of the central hole 31, and the outer diameter of the annular boss is larger than the diameter of the central hole 31 and smaller than the diameter of the connecting hole 11. When the connector 2 is threadedly connected to the plate 10, the annular boss can press the inner circumference of the insulating deformable member 3 against the top surface of the plate 10. Specifically, the annular boss presses against the pressure ring 32. The contact surfaces of both are flat, ensuring that they can fit together fully and thus ensuring a firm connection.

[0045] See Figures 1 to 14 As shown, in one embodiment of the present invention, the head is recessed into the connection hole 11.

[0046] With the above configuration, on the one hand, the head of the connector 2 is hidden inside the insulating shell 1 through the connection hole 11. When the battery cell 40 is detached from the battery cell 40 along with the insulating protection device, and when the head of the connector 2 is made of conductive material, the head of the connector 2 is prevented from contacting other batteries 10 and forming an electrical connection, thereby avoiding the safety hazards caused therefrom. On the other hand, the head of the connector 2 is prevented from contacting other components inside the battery module and scratching other components. Furthermore, the space utilization rate inside the connection hole 11 is increased, and the head of the connector 2 is prevented from hindering the connection of the battery cell 10 to the battery module.

[0047] In another embodiment, the head is flush with the top surface of the insulating cover.

[0048] See Figures 1 to 14 As shown, in one embodiment of the present invention, the insulating protective device further includes an insulating plug, which is connected to the insulating cover and seals the connection hole 11 and covers the head.

[0049] In this embodiment, when the head of the connector 2 is made of conductive material, the insulating plug hides the head of the connector 2. On the one hand, this prevents metal fragments or metal impurities from entering the connection hole 11 and making an electrical connection with the connector 2, thereby avoiding the safety hazards caused by this. On the other hand, it increases the aesthetics of the entire insulation protection device.

[0050] Specifically, the insulating plug is made of a flexible material. When the pad 10 detaches and causes the insulating plug to come into contact with other pads 10 or other components, the insulating plug acts as a buffer to prevent the insulating plug from damaging other pads 10 or other components.

[0051] See Figures 1 to 14 As shown, in one embodiment of the present invention, the insulating cover includes an insulating shell 1, a connecting hole 11 is formed on the insulating shell 1, and an accommodating space is formed between the insulating shell 1 and the bar sheet 10, the accommodating space being able to accommodate the coil 20 electrically connected to the bar sheet 10.

[0052] In this embodiment, the insulating protective device and the coil 20 are both connected to the top surface of the bar sheet 10, and the three are connected in sequence. In order to ensure that the coil 20 can be electrically connected to the bar sheet 10, the distance between the insulating shell 1 and the bar sheet 10 is increased so that a space is formed between them to accommodate the coil 20, and to avoid the setting of the insulating protective device affecting the normal connection between the bar sheet 10 and the coil 20.

[0053] The connector 2 presses the pressure ring 32 against the upper surface of the coil 20. The coil 20 is electrically connected to the plate 10. The cooperation between the connector 2 and the insulating deformable member 3 also prevents the coil 20 from falling off the plate 10. A through hole is provided in the center of the coil 20 for the rod of the connector 2 to pass through.

[0054] Specifically, the insulating shell 1 is made of an insulating rigid material.

[0055] Specifically, the coil 20 is also electrically connected to the conductor 30. Alternating grooves 14 are provided on opposite sides of the insulating shell 1 to allow the conductor 30 to pass, thus preventing interference between the conductor 30 and the insulating shell 1. The alternating grooves 14 can be rectangular, trapezoidal, or other shapes. The dimensions of the alternating grooves 14 are suitable for the conductor 30 and power lines of various square millimeters.

[0056] See Figures 1 to 14 As shown, in one embodiment of the present invention, the insulating shell 1 includes an upper plate 15 and a first side plate 16 and a second side plate 17 extending downward from both sides of the upper plate 15, respectively. The upper plate 15 can cover the bar sheet 10, and the bottom end surfaces of the first side plate 16 and the second side plate 17 can contact the top surface of the bar sheet 10. The accommodating space is defined by the bottom surface of the upper plate 15, the top surface of the bar sheet 10, and the inner surfaces of the first side plate 16 and the second side plate 17.

[0057] In this embodiment, the upper plate 15 is parallel to the bar sheet 10 and is located above the bar sheet 10. The first side plate 16 and the second side plate 17 are both perpendicular to the upper plate 15, and the bottom surfaces of the first side plate 16 and the second side plate 17 are in contact with the upper surface of the bar sheet 10. The first side plate 16 and the second side plate 17 are used to raise the upper plate 15, which facilitates the formation of a accommodating space and also provides support for the upper plate 15. The first side plate 16 and the second side plate 17 are also used to cooperate with the upper plate 15 to form a "U"-shaped structure, which confines the middle part of the bar sheet 10 inside the "U"-shaped structure, preventing the middle part of the bar sheet 10 from contacting other bar sheets 10 and forming an electrical connection.

[0058] Specifically, the upper plate 15 is rectangular, the clearance groove 14 is formed on two opposite sides of the upper plate 15, and the first side plate 16 and the second side plate 17 are set on the other two opposite sides of the upper plate 15.

[0059] See Figures 1 to 14 As shown, in one embodiment of the present invention, the insulating cover further includes two insulating telescopic members 4, which are respectively disposed on both sides of the insulating shell 1. The insulating shell 1 is used to cover the middle part of the bar sheet 10, and the insulating telescopic members 4 are used to cover the side part of the bar sheet 10.

[0060] In this embodiment, the insulating shell 1 and the insulating telescopic member 4 cooperate to cover the entire bar sheet 10. The telescopic length of the insulating telescopic member 4 is adjustable, that is, the coverage area is adjustable, so that the insulating telescopic member 4 can be applied to bar sheets 10 of different sizes, increasing the applicability of the insulating protection device.

[0061] Specifically, the projected area of ​​the insulating shell 1 and the insulating telescopic member 4 toward the bar 10 is greater than the projected area of ​​the bar 10 in the same direction. That is, the edges of the insulating shell 1 and the insulating telescopic member 4 protrude laterally from the bar 10, protecting the side of the bar 10 and preventing the side of the bar 10 from contacting other bars 10 and forming an electrical connection.

[0062] See Figures 1 to 14 As shown, in one embodiment of the present invention, the insulating expandable member 4 includes a first connecting structure 41 for connecting with the insulating shell 1, a second connecting structure 42 for connecting with the end edge of the strip 10, and an insulating film 43 connected between the first connecting structure 41 and the second connecting structure 42.

[0063] In this embodiment, the insulating film 43 is expandable. The insulating film 43 is connected to the insulating shell 1 via a first connecting structure 41 and to the insulating pad 10 via a second connecting structure 42, ensuring the strong connection of the insulating film 43 and thus ensuring that the insulating film 43 can perform its insulating function. The second connecting structure 42 is movable relative to the first connecting structure 41. When the insulating protective device is engaged with the insulating pad 10, the insulating film 43 extends to cover the insulating pad 10, and the second connecting structure 42 moves away from the insulating shell 1. When the insulating protective device is detached from the insulating pad 10, the insulating film 43 contracts, and the second connecting structure 42 moves closer to the insulating shell 1, reducing the volume of the insulating protective device and facilitating its storage and transportation.

[0064] See Figures 1 to 14 As shown, in one embodiment of the present invention, the first connecting structure 41 includes a rotating shaft 411, which is rotatably connected to the insulating shell 1. The insulating film 43 is wound on the rotating shaft 411, and the rotating shaft 411 can switch the insulating film 43 between a wound state and an unfolded state by rotating.

[0065] In this embodiment, when the insulating protective device is engaged with the strip 10, the rotating shaft 411 rotates along the first rotation direction, causing the insulating film 43 to switch to the unfolded state, covering the side of the strip 10. The second connecting structure 42 is connected to the strip 10, fixing the insulating film 43 in the unfolded state. When the insulating protective device is removed from the strip 10, the rotating shaft 411 rotates along the second rotation direction, causing the insulating film 43 to switch to the rolled-up state. One of the first and second rotation directions is clockwise, and the other is counterclockwise. The insulating film 43 does not need to be stretched when unfolded, that is, the insulating film 43 does not need to undergo elastic deformation, avoiding long-term stretching of the insulating film 43 which could lead to elastic failure. Therefore, the insulating film 43 can be made using only flexible insulating materials, allowing for a wider range of material choices.

[0066] Specifically, the insulating shell 1 also includes four protrusions 18. Two protrusions 18 are connected to the first side plate 16, located on opposite sides of the first side plate 16. These two protrusions 18 are perpendicular to both the first side plate 16 and the upper plate 15. Each of these two protrusions 18 has a rotating hole 19, which is coaxial. The rotating shaft 411 of the first insulating telescopic member 4 is rotatably connected to these two rotating holes 19. Two protrusions 18 are connected to the second side plate 17, located on opposite sides of the second side plate 17. These two protrusions 18 are perpendicular to both the second side plate 17 and the upper plate 15. Each of these two protrusions 18 has a rotating hole 19, which is coaxial. The rotating shaft 411 of the second insulating telescopic member 4 is rotatably connected to these two rotating holes 19. The protrusions 18 provide mounting positions for the rotating shaft 411. The insulating shell 1 and the protrusions 18 can be integrally formed.

[0067] Specifically, a rotating component 412 is provided at the end of the rotating shaft 411. The rotating component 412 is fixedly connected to the rotating shaft 411. The rotating component 412 has a circular plate structure, protruding from the rotating hole 19 and located outside the "U"-shaped structure of the insulating shell 1. A rotating groove 4121 is provided on the side of the rotating component 412 facing away from the rotating shaft 411. The rotating component 412 is driven to rotate through the rotating groove 4121, thereby driving the rotating shaft 411 to rotate. Each rotating shaft 411 is equipped with two rotating components 412, with one rotating component 412 provided at each end of the rotating shaft 411. The rotating groove 4121 is in the shape of an "I" or a "+" or other screw-in groove structure.

[0068] Specifically, elongated holes 12 are provided on both the first side plate 16 and the second side plate 17. The first end of the insulating film 43 is connected to the rotating shaft 411, which is located on the first side of the elongated hole 12, that is, inside the "U"-shaped structure of the insulating shell 1. The second end of the insulating film 43 passes through the elongated hole 12 and is located on the second side of the elongated hole 12. The second connecting structure 42 is also located on the second side of the elongated hole 12, that is, outside the "U"-shaped structure of the insulating shell 1. The second connecting structure 42 cannot pass through the elongated hole 12. The first side and the second side are opposite sides of the elongated hole 12. When the insulating film 43 switches from the rolled-up state to the unfolded state, the insulating film 43 passes through the elongated hole 12 to the second side of the elongated hole 12. By setting the elongated hole 12, on the one hand, when the insulating film 43 is in the unfolded state, the joint between the insulating shell 1 and the insulating film 43 forms a seamless fit, avoiding the formation of gaps that would allow metal fragments or metal impurities to pass through the gaps and contact the plate 10; on the other hand, it increases the space utilization rate inside the "U"-shaped structure of the insulating shell 1, making the entire insulating protection device smaller in size.

[0069] See Figures 1 to 14 As shown, in one embodiment of the present invention, the second connecting structure 42 includes a middle buckle 421 and a side buckle 422. The middle buckle 421 can cover the edge of the bar piece 10, and the side buckle 422 can connect to the corner of the bar piece 10 and cover the corner of the bar piece 10.

[0070] In this embodiment, the middle buckle 421 is connected to the second end of the insulating film 43, and the side buckle 422 serves to insulate the corners of the strip 10, preventing the corners of the strip 10 from contacting other strips 10 and forming an electrical connection.

[0071] Specifically, each insulating retractable member 4 includes a central buckle 421 and two side buckles 422. The two insulating retractable members 4 together include four side buckles 422, which correspond to the four corners of the panel 10.

[0072] Specifically, the middle buckle 421 is an "L"-shaped structure formed by two plates, which can be fastened to the edge of the bar sheet 10. One plate of the middle buckle 421 is located on the upper surface of the bar sheet 10, and the other plate is located on the side of the bar sheet 10. The middle buckle 421 serves to insulate the edge of the bar sheet 10, preventing the edge of the bar sheet 10 from contacting other bar sheets 10 and forming an electrical connection.

[0073] See Figures 1 to 14 As shown, in one embodiment of the present invention, the side buckle 422 is provided with a slot 4221, which can be locked at the corner of the plate 10.

[0074] In this embodiment, the shape of the slot 4221 is adapted to the shape of the corner of the strip 10. The corner of the strip 10 is inserted into the slot 4221. The edge buckle 422 is used to protect the corner of the strip 10 and also to limit the horizontal movement space of the insulating film 43 and the rotating shaft 411, preventing the insulating film 43 and the rotating shaft 411 from moving in the horizontal direction. The horizontal direction is the width direction of the strip 10, which is... Figure 13 The direction is perpendicular to the plane (screen) where the illustration is located.

[0075] Specifically, brackets 6 are provided on the first side plate 16 and the second side plate 17. The brackets 6 are located on the side of the first side plate 16 opposite to the upper plate 15, that is, on the second side of the elongated hole 12. When the insulating film 43 is in the rolled-up state, the slot 4221 of the edge buckle 422 is engaged with the bracket 6 and supported by the bracket 6, thus fixing the second connecting structure 42 to the second side of the elongated hole 12. There are four brackets 6. Two brackets 6 are provided on the first side plate 16, and these two brackets 6 correspond one-to-one with the two edge buckles 422 on the same side. Two brackets 6 are also provided on the second side plate 17, and these two brackets 6 correspond one-to-one with the two edge buckles 422 on the same side. The brackets 6 can be a triangular structure with strong stability, or an "L" shape or other shapes. The size of the bracket 6 is smaller than the size of the slot 4221 of the edge buckle 422. The first side plate 16, the second side plate 17, the upper plate 15 and the brackets 6 can be an integrally formed structure.

[0076] See Figures 1 to 14 As shown, in one embodiment of the present invention, the insulation protection device further includes a locking structure, which has a locked state and an unlocked state. In the locked state, the locking structure locks the rotating shaft 411 to the insulating shell 1. In the unlocked state, the locking structure releases the locking relationship between the rotating shaft 411 and the insulating shell 1.

[0077] In this embodiment, when the insulating film 43 is in the unfolded state, the locking structure locks the rotating shaft 411 to the insulating shell 1, preventing the rotating shaft 411 from rotating relative to the insulating shell 1 under the action of external force, thereby ensuring that the insulating film 43 can remain in the unfolded state and ensuring the stability of the entire insulating protection device.

[0078] See Figures 1 to 14 As shown, in one embodiment of the present invention, the locking structure includes a locking groove 13 and a locking block 51. The locking groove 13 is formed on the insulating shell 1, and the locking block 51 is disposed on the rotating shaft 411. In the locked state, the locking block 51 is inserted into the locking groove 13, and in the unlocked state, the locking block 51 is pulled out of the locking groove 13.

[0079] In this embodiment, the locking groove 13 is formed on the inner wall of the rotating hole 19, and the rotating shaft 411 is also slidably connected to the rotating hole 19, that is, the rotating shaft 411 can move axially relative to the rotating hole 19. During the process of the locking structure switching from the unlocked state to the locked state, the rotating shaft 411 rotates until the locking block 51 is aligned with the locking groove 13, and the rotating shaft 411 moves towards the locking groove 13, causing the locking block 51 to be inserted into the locking groove 13, locking the rotating shaft 411 and the insulating shell 1. At this time, the rotating shaft 411 cannot rotate relative to the rotating hole 19. During the process of the locking structure switching from the locked state to the unlocked state, the rotating shaft 411 moves away from the locking groove 13, causing the locking block 51 to be pulled out from the locking groove 13, releasing the locking relationship between the rotating shaft 411 and the insulating shell 1. At this time, the rotating shaft 411 can rotate relative to the rotating hole 19.

[0080] Specifically, a locking block 51 is provided on each rotating shaft 411, and multiple locking slots 13, such as six, are opened in the corresponding rotating hole 19 of each rotating shaft 411. The locking slots 13 are evenly distributed along the circumference of the rotating shaft 411, and each locking slot 13 defines a circumferential position of the rotating shaft 411. When the rotating shaft 411 rotates until the locking block 51 is aligned with any locking slot 13, the rotating shaft 411 is moved along the axial direction of the rotating shaft 411 so that the locking block 51 is inserted into the locking slot 13, thereby completing the locking.

[0081] Specifically, the locking groove 13 is a trapezoidal groove.

[0082] See Figure 15 As shown, the present invention also provides a battery module, including a battery plate 10, a coil 20, a battery cell 40, and the aforementioned insulation protection device. The insulation protection device is connected to the battery plate 10, and the coil 20 and the battery cell 40 are both electrically connected to the battery plate 10.

[0083] In this embodiment, the insulation protection device of the battery module has all the technical solutions and effects of the above-mentioned insulation protection device, which will not be repeated here.

[0084] Specifically, the battery module also includes a wire 30, which is electrically connected to the coil 20.

[0085] The connection method between the insulating protective device and the bar plate 10 is as follows:

[0086] Place the insulating protective device above the bar plate 10, so that the connecting hole 11, the center hole 31, the through hole on the coil 20 are coaxial with the threaded hole on the bar plate 10.

[0087] The connector 2 passes through the connecting hole 11, the center hole 31 and the through hole of the coil 20 in sequence. The connector 2 drives the stretching membrane 34 to extend towards the bar plate 10. When the connector 2 is inserted into the threaded hole, the connector 2 is threadedly connected to the bar plate 10 by screwing. At this time, the bottom end face of the head of the connector 2 presses the pressure ring 32 of the insulating deformable part 3 against the upper surface of the coil 20.

[0088] Rotating the shaft 411 by rotating the rotating component 412 switches the insulating film 43 from the wound state to the unfolded state, installs the middle buckle 421 on the edge of the strip 10, and snaps the edge buckle 422 at the corner of the strip 10.

[0089] Move the rotating shaft 411 along its axial direction and toward the locking groove 13 so that the locking block 51 is inserted into the locking groove 13 in which it is aligned; the connection between the insulating protective device and the bar plate 10 is completed.

[0090] The method for removing the insulating protective device from the valve 10 is as follows:

[0091] Moving the rotating shaft 411 along its axial direction and away from the locking groove 13 causes the locking block 51 to be pulled out of the locking groove 13.

[0092] By rotating the shaft 411 through the rotating component 412, the insulating film 43 is switched from the unfolded state to the rolled-up state, and the edge buckle 422 is locked onto the bracket 6.

[0093] Tighten the connector 2 to detach it from the bar plate 10, and pull the connector 2 out of the through hole, center hole 31 and connecting hole 11 of the coil 20 in sequence. The stretching membrane 34 shrinks and forms a flat state as the connector 2 moves.

[0094] Remove the insulating protective device from the bar plate 10 to complete the disassembly.

[0095] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. An insulating protective device, characterized in that, The insulation protection device comprises: an insulation cover configured to cover the busbar (10), the insulation cover having a projection area larger than that of the busbar (10) in the same direction, and a connecting hole (11) being formed in the center of the insulation cover; an insulation deformable member (3) formed in a ring shape with an inner peripheral edge and an outer peripheral edge, the insulation deformable member (3) being fixed to one side of the insulation cover facing the busbar (10) through the outer peripheral edge, and the center hole (31) of the insulation deformable member (3) being coaxial with the connecting hole (11), the diameter of the center hole (31) being smaller than that of the connecting hole (11); and a connecting member (2) configured to pass through the connecting hole (11) and the center hole (31) to connect to the busbar (10), and to stretch the insulation deformable member (3) so that the inner peripheral edge of the insulation deformable member (3) is fixed to the top surface of the busbar (10), the connecting member (2) comprising a rod portion and a head portion, the diameter of the head portion being smaller than that of the connecting hole (11) and larger than that of the center hole (31).

2. The insulating protective device according to claim 1, characterized in that The insulation deformable member (3) comprises a compression ring (32) arranged on the inner peripheral edge, a fixing ring (33) arranged on the outer peripheral edge, and an elastic film (34) connected between the compression ring (32) and the fixing ring (33); and / or, the head portion is connected to one end of the rod portion, the other end of the rod portion away from the head portion is formed with external threads for threadedly connecting with the busbar (10), and the diameter of the rod portion is smaller than that of the center hole (31), so that when the connecting member (2) is threadedly connected to the busbar (10), the bottom end surface of the head portion can press the inner peripheral edge of the insulation deformable member (3) against the top surface of the busbar (10).

3. The insulating protective device of claim 2, wherein, the head portion is flush with the top surface of the insulation cover, or the head portion is recessed into the connecting hole (11); and / or, the insulation protection device further comprises an insulation plug connected with the insulation cover, and the insulation plug seals the connecting hole (11) and covers the head portion.

4. An insulating protective device according to any one of claims 1 to 3, characterized in that, The insulation cover comprises an insulation shell (1), the connecting hole (11) is formed in the insulation shell (1), and a containing space is formed between the insulation shell (1) and the busbar (10) to accommodate a wire coil (20) electrically connected with the busbar (10).

5. The insulating protective device of claim 4, wherein, The insulation shell (1) comprises an upper plate (15), a first side plate (16) and a second side plate (17) respectively extending downward from both sides of the upper plate (15), the upper plate (15) is configured to cover the busbar (10), the bottom end surfaces of the first side plate (16) and the second side plate (17) are configured to contact the top surface of the busbar (10), and the containing space is defined by the bottom surface of the upper plate (15), the top surface of the busbar (10), and the inner side surfaces of the first side plate (16) and the second side plate (17); and / or, The insulating cover further comprises two insulating retractable parts (4) arranged on both sides of the insulating shell (1) respectively, the insulating shell (1) is used for covering the middle part of the bar sheet (10), and the insulating retractable part (4) is used for covering the side part of the bar sheet (10).

6. The insulating protective device of claim 5, wherein, The insulating retractable part comprises a first connecting structure (41) used for connecting with the insulating shell (1), a second connecting structure (42) used for connecting with the end edge of the bar sheet (10), and an insulating film (43) connected between the first connecting structure and the second connecting structure.

7. The insulating protective device of claim 6, wherein, The first connecting structure (41) comprises a rotating shaft (411) rotatably connected with the insulating shell (1), the insulating film (43) is wound on the rotating shaft (411), and the rotating shaft (411) can switch the insulating film (43) between the winding state and the unfolding state through rotation; and / or, The second connecting structure (42) comprises a middle buckle (421) capable of covering the edge part of the bar sheet (10) and an edge buckle (422) capable of being connected with the edge corner of the bar sheet (10) and covering the edge corner of the bar sheet (10).

8. The insulating protective device of claim 7, wherein, The edge buckle (422) is provided with a clamping groove (4221) capable of being clamped at the edge corner of the bar sheet (10); and / or, The insulating protection device further comprises a locking structure, the locking structure has a locking state and an unlocking state, in the locking state, the locking structure locks the rotating shaft (411) and the insulating shell (1), and in the unlocking state, the locking structure releases the locking relationship between the rotating shaft (411) and the insulating shell (1).

9. The insulating protective device of claim 8, wherein, The locking structure comprises a locking groove (13) and a locking block (51), the locking groove is arranged on the insulating shell (1), the locking block (51) is arranged on the rotating shaft (411), in the locking state, the locking block (51) is inserted into the locking groove (13), and in the unlocking state, the locking block (51) is separated from the locking groove (13).

10. A battery module, characterized by The insulating protection device comprises a bar sheet (10), a wire coil (20), an electric core (40) and the insulating protection device as claimed in any one of claims 1 to 9, the insulating protection device is connected with the bar sheet (10), and the wire coil (20) and the electric core (40) are both electrically connected with the bar sheet (10).

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