Insulation protection device and battery module

Abstract

The invention 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 constructed to be capable of covering a bar, and the center of the insulation cover is provided with a connecting hole; an insulating deformable member formed in a ring shape having an inner peripheral edge and an outer peripheral edge; and the connecting piece is arranged to be capable of penetrating through the connecting hole and the central hole to be connected to the bar piece. The insulation cover has an insulation function, when the bar pieces and the insulation protection device are vibrated at the same time, the insulation protection device cannot be separated from the bar pieces, after connection between the bar pieces and the battery cell fails, the bar pieces are separated from the battery cell, the insulation protection device and the bar pieces move together, and when the separated bar pieces make contact with another bar piece which is not separated, the insulation protection device and the bar pieces move together. And due to the arrangement of the insulation protection device, the conductive parts between the two bars are not contacted, so that a short-circuit accident is avoided, and the battery module is prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of battery safety, and in particular to an insulation protection device and a battery module. Background Art

[0002] With the development of the new energy industry, battery modules are needed in the fields of energy storage, communications and electric vehicles. The battery cells in the battery modules usually need to be connected using aluminum tabs with good conductivity. In the prior art known to the inventor, the aluminum tabs and the battery cells are connected by spot welding. Spot welding can cause cold welding between the aluminum tabs and the battery cells due to oxidation or impurities at the welding points, poor welding temperature, improper welding method, excessive welding pressure or improper selection of spot welding machines. That is, the two are not completely connected together, and it is generally not visible to the naked eye. During the use of the battery module, due to cold welding, the vibration of the battery module may cause the tabs to fall off the battery cells, and the fallen tabs move randomly. If they move to contact other tabs, a short circuit accident will occur, causing serious damage to the battery module. Summary of the invention

[0003] The purpose of the present invention is to overcome the problem in the prior art that the tabs may fall off and cause a short circuit, and to provide an insulating protection device and a battery module. The insulating protection device has the function of preventing the tabs from being electrically connected and causing a battery short circuit.

[0004] In order to achieve the above-mentioned purpose, the present invention provides an insulating protection device on one hand, including: an insulating cover, the insulating cover is constructed to be able to cover the bar piece, and a connecting hole is opened in the center of the insulating cover; an insulating deformable part, the insulating deformable part is formed into a ring with an inner peripheral edge and an outer peripheral edge, the insulating deformable part is fixed to the side of the insulating cover facing the bar piece through the outer peripheral edge, and the center hole of the insulating deformable part is coaxial with the connecting hole, and the aperture of the center hole is smaller than the aperture of the connecting hole; and a connecting part, the connecting part is configured to be able to pass through the connecting hole and the center hole to connect to the bar piece, and stretch the inner peripheral edge of the insulating deformable part to fix it to the top surface of the bar piece.

[0005] Preferably, the insulating deformable part includes a pressure ring arranged on the inner circumference, a fixing ring arranged on the outer circumference, and a telescopic membrane connected between the pressure ring and the fixing ring; and / or, the connecting part includes a rod and a head, the head is connected to one end of the rod, and an end of the rod facing away from the head is formed with an external thread for threaded connection with the bar piece, the diameter of the head is smaller than the diameter of the connecting hole and larger than the diameter of the center hole, the diameter of the rod is smaller than the diameter of the center hole, and when the connecting part is threadedly connected to the bar piece, the bottom end surface of the head can press the inner circumference of the insulating deformable part against the top surface of the bar piece.

[0006] Preferably, the head is flush with the top surface of the insulating cover, or the head is recessed into the connecting hole; and / or, the insulating protection device further comprises an insulating plug, which is connected to the insulating cover and closes the connecting hole and covers the head.

[0007] Preferably, the insulating cover comprises an insulating shell, a connecting hole is provided on the insulating shell, and a receiving space is formed between the insulating shell and the bar piece, and the receiving space can receive a wire reel electrically connected to the bar piece.

[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 respectively, the upper plate can cover the bar piece, the bottom end surfaces of the first side plate and the second side plate can contact the top surface of the bar piece, and the accommodating space is defined and formed by the bottom surface of the upper plate, the top surface of the bar piece and the inner side surfaces of the first side plate and the second side plate; and / or, the insulating cover also includes two insulating retractable parts, which are respectively arranged on both sides of the insulating shell, the insulating shell is used to cover the middle part of the bar piece, and the insulating retractable parts are used to cover the sides of the bar piece.

[0009] Preferably, the insulating retractable member includes a first connecting structure for connecting to the insulating shell, a second connecting structure for connecting to the end edge of the bar sheet, 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, and the rotating shaft can switch the insulating film between a rolled-up state and an unfolded state by rotation; and / or, the second connecting structure includes a middle buckle and a side buckle, the middle buckle can cover the edge of the flap, and the side buckle can be connected to the corners of the flap and cover the corners of the flap.

[0011] Preferably, a card slot is provided on the side buckle, and the card slot can be clamped at the corner of the bar; and / or, the insulating protection device also includes a locking structure, the locking structure has a locked state and an unlocked state, in the locked state, the locking structure locks the rotating shaft and 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 comprises a locking groove and a locking block, the locking groove is provided on the insulating shell, the locking block is arranged 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 pulled out of the locking groove.

[0013] A second aspect of the present invention provides a battery module, including a bar sheet, a wire reel, a battery cell and the above-mentioned insulating protection device, wherein the insulating protection device is connected to the bar sheet, and the wire reel and the battery cell are both electrically connected to the bar sheet.

[0014] Through the above technical solution, the insulating cover is connected to the bar, and the insulating cover has an insulating function. When the bar and the insulating protection device are vibrated at the same time, the insulating protection device will not be separated from the bar due to the firm connection between the insulating protection device and the bar. When the connection between the bar and the battery cell fails, the bar is separated from the battery cell, and the insulating protection device moves together with the bar. When the detached bar touches another bar that has not been detached, due to the setting of the insulating protection device, the conductive parts of the two bar pieces will not contact, and thus the two bar pieces will not be electrically connected, and there will be no short circuit accident, thereby avoiding damage to the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the insulation protection device of the present invention except the connection structure;

[0016] Figure 2 yes Figure 1 A structural diagram from another angle;

[0017] Figure 3 It is a schematic diagram of the structure of the insulating shell, the insulating deformable member, and the first connecting structure;

[0018] Figure 4 yes Figure 3 A partial enlarged view of middle A;

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

[0020] Figure 6 yes Figure 5 Schematic diagram of the structure from another angle;

[0021] Figure 7 is a schematic diagram of the structure of an insulating deformable member;

[0022] Figure 8 is a schematic diagram of the structure of the insulating retractable member;

[0023] Fig. 9 is a schematic structural diagram of the insulating retractable member excluding the first connecting structure;

[0024] Fig.10 is a structural schematic diagram of a first connection structure;

[0025] Fig.11 It is a schematic diagram of the structure of the insulation protection device of the present invention in cooperation with the bar, the wire reel and the wire;

[0026] Fig.12 yes Fig.11 Schematic diagram of the structure from another angle;

[0027] Fig.13 yes Fig.11The main view of

[0028] Fig.14 yes Fig.13 perspective view; and

[0029] Fig.15 It is a schematic structural diagram of a battery module of the present invention.

[0030] Description of Reference Numerals

[0031] 1. Insulating shell; 11. Connecting hole; 12. Long hole; 13. Locking groove; 14. Avoiding groove; 15. Upper plate; 16. First side plate; 17. Second side plate; 18. Protrusion; 19. Rotating hole; 2. Connecting piece; 3. Insulating deformable piece; 31. Center hole; 32. Pressing ring; 33. Fixing ring; 34. Telescopic membrane; 4. Insulating telescopic piece; 41. First connecting structure; 411. Rotating shaft; 412. Rotating piece; 4121. Rotating groove; 42. Second connecting structure; 421. Middle buckle; 422. Side buckle; 43. Insulating membrane; 51. Locking block; 6. Bracket; 10. Bar piece; 20. Wire drum; 30. Wire; 40. Battery cell. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0033] See also Figures 1 to 14 As shown, the present invention provides an insulating protection device, comprising: an insulating cover, the insulating cover is constructed to be able to cover the bar piece 10, and a connecting hole 11 is opened in the center of the insulating cover; an insulating deformable member 3, the insulating deformable member 3 is formed into a ring with an inner peripheral edge and an outer peripheral edge, the insulating deformable member 3 is fixed to the side of the insulating cover facing the bar piece 10 through the outer peripheral edge, and the center hole 31 of the insulating deformable member 3 is coaxial with the connecting hole 11, and the aperture of the center hole 31 is smaller than the aperture of the connecting hole 11; and a connecting member 2, the connecting member 2 is configured to be able to pass through the connecting hole 11 and the center hole 31 to connect to the bar piece 10, and stretch the inner peripheral edge of the insulating deformable member 3 to fix it to the top surface of the bar piece 10.

[0034] In this embodiment, the connector 2 is connected to the tab 10 after passing through the connecting hole 11 of the insulating cover. By adding the connector 2, the connection firmness between the insulating cover and the tab 10 is increased, so that the insulating cover and the tab 10 can form a whole. When the tab 10 is vibrated and the connection with the battery cell 40 fails, the tab 10 falls off the battery cell 40, and the insulating cover moves together with the tab 10. When the tab 10 detached from the battery cell 40 touches the tab 10 that is not detached from the battery cell 40, due to the presence of the insulating cover, the conductive parts of the two tabs 10 will not touch each other, that is, the two tabs 10 are insulated, thereby avoiding electrical connection between the two tabs 10, thereby reducing the risk of short circuit and leakage, protecting the battery cell, and improving the safety of the battery module.

[0035] The connector 2 is connected to the insulating cover through the insulating deformable part 3. The insulating deformable part 3 has elastic deformation performance. Through the setting of the insulating deformable part 3, the insulating cover can be connected to the bar pieces 10 of various sizes. The deeper the connector 2 penetrates into the connecting hole 11, the greater the stretching degree of the insulating deformable part 3. On the contrary, the smaller the depth of the connector 2 penetrates into the connecting hole 11, the smaller the stretching degree of the insulating deformable part 3. The insulating deformable part 3 also has the function of insulation. When part of the connector 2 is a conductive material, after the insulating deformable part 3 is stretched, the part of the connector 2 is located inside the insulating deformable part 3, that is, the conductive part of the connector 2 is isolated from the outside world by the insulating deformable part 3, so as to achieve insulation, avoid the contact between the bar piece 10 and the conductive part of the connector 2, and thus avoid short circuit or other circuit problems.

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

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

[0038] In this embodiment, the telescopic film 34 has elastic properties and insulating properties. The telescopic film 34 is flexible and can be stretched in a larger range. The connector 2 stretches the telescopic film 34 toward the direction close to the bar 10 through the pressure ring 32. The pressure ring 32 is made of hard material to prevent the inner circumference from being deformed by the stretching of the telescopic film 34, that is, to prevent the diameter of the center hole 31 from becoming larger, and then to prevent the connector 2 from passing through the center hole 31 and hindering the connector 2 from stretching the telescopic film 34, that is, to ensure that the connector 2 can smoothly stretch the telescopic film 34 through the pressure ring 32. The fixing ring 33 is connected to the side of the insulating cover facing the bar 10, and the outer circumference is located between the fixing ring 33 and the insulating cover. The fixing ring 33 is used to fix the insulating film 43 on the insulating cover. The fixing ring 33 is also made of hard material to prevent the outer circumference from being deformed by the stretching of the telescopic film 34, and then to prevent the telescopic film 34 from falling off the insulating cover, and to ensure the firmness of the connection between the telescopic film 34 and the insulating cover.

[0039] Specifically, the telescopic film 34 is in the shape of a ring.

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

[0041] In this embodiment, the connector 2 is threadedly connected to the bar 10, so that the connection between the two is more stable, and the threaded connection is a detachable connection method, so that the entire insulating protection device can be removed from the bar 10 for replacement or maintenance, which is easy to operate. When the connector 2 is connected to the bar 10, the bottom end surface of the head of the connector 2 is pressed against the upper surface of the pressure ring 32, and the bottom end surface of the head and the upper surface of the pressure ring 32 are both flat, and the two can fit together to prevent the pressure ring 32 from being separated from the connector 2, ensuring the connection between the connector 2 and the insulating deformable part 3, and then ensuring the connection between the connector 2 and the insulating cover. The head is located below the connecting hole 11 as a whole, or the end of the head close to the rod is located below the connecting hole 11, so that the bottom end surface of the head can press the pressure ring 32 to the greatest extent.

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

[0043] Specifically, a threaded hole is opened at the center of the bar 10, and the connecting hole 11 and the center hole 31 are coaxial with the threaded hole. The rod of the connecting member 2 passes through the connecting hole 11 and the center hole 31 in sequence and is threadedly connected with 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, the annular boss is arranged around the rod and has an axial spacing between the head, the end of the rod away from the head is formed with an external thread for threaded connection with the bar 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 center hole 31, the outer diameter of the annular boss is larger than the diameter of the center hole 31 and smaller than the diameter of the connecting hole 11, when the connector 2 is threadedly connected to the bar 10, the annular boss can press the inner circumference of the insulating deformable part 3 against the top surface of the bar 10, specifically the annular boss presses the pressing ring 32, and the contact surfaces of the two are flat, ensuring that the two can fully fit, thereby ensuring the firmness of the connection.

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

[0046] Through the above arrangement, on the one hand, the head of the connector 2 is hidden in the insulating shell 1 through the connecting hole 11. When the bar 10 and the insulating protection device are separated from the battery cell 40, and when the head of the connector 2 is a conductive material, the head of the connector 2 is prevented from contacting with other bars 10 and generating electrical connection, thereby avoiding the potential safety hazard caused thereby; on the other hand, the head of the connector 2 is prevented from contacting with other components inside the battery module and scratching other components; on the other hand, the space utilization inside the connecting hole 11 is increased to avoid the head of the connector 2 hindering the bar 10 from being connected to the battery module.

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

[0048] See also Figures 1 to 14 As shown, in one embodiment of the present invention, the insulation protection device further comprises an insulation plug, which is connected to the insulation cover and closes 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, it prevents metal fragments or metal impurities from entering the connecting hole 11 and establishing an electrical connection with the connector 2, thereby avoiding the safety hazards caused thereby; on the other hand, it increases the aesthetics of the entire insulating protection device.

[0050] Specifically, the insulating plug is made of a flexible material. When the bar piece 10 is detached and causes the insulating plug to contact other bar pieces 10 or other components, the insulating plug acts as a buffer to prevent the insulating plug from damaging other bar pieces 10 or other components.

[0051] See also 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 opened on the insulating shell 1, and a receiving space is formed between the insulating shell 1 and the bar piece 10, and the receiving space can accommodate a wire reel 20 electrically connected to the bar piece 10.

[0052] In this embodiment, the insulating protection device and the wire reel 20 are both connected to the top surface of the bar piece 10, and the three are connected in sequence. In order to ensure that the wire reel 20 can be electrically connected to the bar piece 10, the distance between the insulating shell 1 and the bar piece 10 is increased, so that a storage space is formed between the two to accommodate the wire reel 20, thereby preventing the setting of the insulating protection device from affecting the normal connection between the bar piece 10 and the wire reel 20.

[0053] The connector 2 presses the pressing ring 32 against the upper surface of the wire drum 20, and the wire drum 20 is electrically connected to the bar 10. The cooperation between the connector 2 and the insulating deformable member 3 can also prevent the wire drum 20 from falling off the bar 10. A through hole is provided in the center of the wire drum 20 for the rod of the connector 2 to pass through.

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

[0055] Specifically, the wire reel 20 is also electrically connected to the wire 30, and avoidance grooves 14 are provided on opposite sides of the insulating shell 1 to avoid the wire 30 and prevent the wire 30 from interfering with the insulating shell 1. The avoidance groove 14 can be a rectangular groove or a trapezoidal groove, or a groove of other shapes, and the size of the avoidance groove 14 is suitable for the wire 30 and each square power line.

[0056] See also 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 piece 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 piece 10, and the accommodating space is defined by the bottom surface of the upper plate 15, the top surface of the bar piece 10, and the inner side 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 piece 10, the upper plate 15 is located above the bar piece 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 both in contact with the upper surface of the bar piece 10, the first side plate 16 and the second side plate 17 are used to raise the upper plate 15 to facilitate the formation of the accommodation space, and also play a supporting role 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, and the middle part of the bar piece 10 is confined inside the "U"-shaped structure to prevent the middle part of the bar piece 10 from contacting other bar pieces 10 and generating electrical connections.

[0058] Specifically, the upper plate 15 is rectangular, the avoidance grooves 14 are opened on two opposite sides of the upper plate 15 , and the first side plate 16 and the second side plate 17 are arranged on the other two opposite sides of the upper plate 15 .

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

[0060] In this embodiment, the insulating shell 1 and the insulating telescopic member 4 cooperate to cover the entire bar 10. The telescopic length of the insulating telescopic member 4 is adjustable, that is, the covering area is adjustable, so that the insulating telescopic member 4 can be applied to bars 10 of different sizes, increasing the application range of the insulating protective device.

[0061] Specifically, the projection area of ​​the insulating shell 1 and the insulating retractable part 4 toward the bar sheet 10 is larger than the projection area of ​​the bar sheet 10 in the same direction, that is, the edges of the insulating shell 1 and the insulating retractable part 4 protrude laterally from the bar sheet 10 to protect the side edges of the bar sheet 10 and prevent the side edges of the bar sheet 10 from contacting other bar sheets 10 and generating electrical connections.

[0062] See also Figures 1 to 14 As shown, in one embodiment of the present invention, the insulating retractable part 4 includes a first connecting structure 41 for connecting to the insulating shell 1, a second connecting structure 42 for connecting to the end edge of the bar 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 has a retractable function. The insulating film 43 is connected to the insulating shell 1 through the first connecting structure 41 and connected to the bar sheet 10 through the second connecting structure 42, so as to ensure the connection firmness of the insulating film 43 and further ensure that the insulating film 43 can achieve its insulating function. The second connecting structure 42 can move relative to the first connecting structure 41. When the insulating protection device cooperates with the bar sheet 10, the insulating film 43 stretches to cover the bar sheet 10, and the second connecting structure 42 moves away from the insulating shell 1; when the insulating protection device is detached from the bar sheet 10, the insulating film 43 shrinks, and the second connecting structure 42 moves toward the insulating shell 1, so as to reduce the volume of the insulating protection device and facilitate the storage and transportation of the insulating protection device.

[0064] See also 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, and the insulating film 43 is wound on the rotating shaft 411. The rotating shaft 411 can switch the insulating film 43 between a rolled state and an unfolded state by rotating.

[0065] In this embodiment, when the insulating protection device cooperates with the tab 10, the rotating shaft 411 rotates along the first rotation direction, so that the insulating film 43 switches to the unfolded state, covering the side of the tab 10, and the second connecting structure 42 is connected to the tab 10 to fix the insulating film 43 in the unfolded state; when the insulating protection device is detached from the tab 10, the rotating shaft 411 rotates along the second rotation direction, so that the insulating film 43 switches to the rolled state. One of the first rotation direction and the second rotation direction 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 be elastically deformed, so as to avoid the insulating film 43 from being stretched for a long time and causing elastic failure. Therefore, the insulating film 43 only needs to be made of insulating flexible materials, and the range of material selection is wider.

[0066] Specifically, the insulating shell 1 also includes a protrusion 18, and the protrusion 18 is provided with four protrusions. Two protrusions 18 are connected to the first side plate 16, and the two protrusions 18 are respectively located on opposite sides of the first side plate 16. The two protrusions 18 are perpendicular to the first side plate 16 and the upper plate 15. The two protrusions 18 are provided with a rotation hole 19, and the two rotation holes 19 are coaxial. The rotating shaft 411 of the first insulating telescopic member 4 is rotatably connected to the two rotation holes 19; the second side plate 17 is connected to two protrusions 18, and the two protrusions 18 are respectively located on opposite sides of the second side plate 17. The two protrusions 18 are perpendicular to the second side plate 17 and the upper plate 15. The two protrusions 18 are provided with a rotation hole 19, and the two rotation holes 19 are coaxial. The rotating shaft 411 of the second insulating telescopic member 4 is rotatably connected to the two rotation holes 19. The setting of the protrusion 18 is used to provide an installation position for the rotating shaft 411. The insulating shell 1 and the protrusion 18 can be integrally formed.

[0067] Specifically, a rotating member 412 is provided at the end of the rotating shaft 411, and the rotating member 412 is fixedly connected to the rotating shaft 411. The rotating member 412 is a circular plate-shaped structure, and the rotating member 412 protrudes from the rotating hole 19 and is located outside the "U"-shaped structure of the insulating shell 1. A rotating groove 4121 is provided on the side of the rotating member 412 away from the rotating shaft 411, and the rotating member 412 is driven to rotate through the rotating groove 4121, thereby driving the rotating shaft 411 to rotate. Each rotating shaft 411 is matched with two rotating members 412, and a rotating member 412 is provided at each end of the rotating shaft 411. The shape of the rotating groove 4121 is a "one" shape or a "cross" shape or other groove-shaped structure that can be screwed.

[0068] Specifically, a long hole 12 is provided on 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, the rotating shaft 411 is located on the first side of the long hole 12, that is, it is located inside the "U"-shaped structure of the insulating shell 1, the second end of the insulating film 43 passes through the long hole 12 and is located on the second side of the long hole 12, the second connecting structure 42 is also located on the second side of the long hole 12, that is, it is located outside the "U"-shaped structure of the insulating shell 1, the second connecting structure 42 cannot pass through the long hole 12, the first side and the second side are opposite sides of the long hole 12, when the insulating film 43 switches from the rolled state to the unfolded state, the insulating film 43 passes through the long hole 12 to the second side of the long hole 12. By setting the long hole 12, on the one hand, when the insulating film 43 is in the expanded state, the joint between the insulating shell 1 and the insulating film 43 forms a seamless fit, avoiding the formation of a gap here and causing metal fragments or metal impurities to pass through the gap and contact the bar 10; on the other hand, the space utilization rate inside the "U"-shaped structure of the insulating shell 1 is increased, making the volume of the entire insulating protection device smaller.

[0069] See also Figures 1 to 14 As shown, in one embodiment of the present invention, the second connection structure 42 includes a middle buckle 421 and a side buckle 422. The middle buckle 421 can cover the edge of the flap 10, and the side buckle 422 can be connected to the corners of the flap 10 and cover the corners of the flap 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 insulates the corners of the bar sheet 10 to prevent the corners of the bar sheet 10 from contacting other bar sheets 10 and generating electrical connection.

[0071] Specifically, each insulating retractable member 4 includes a middle buckle 421 and two side buckles 422 , and the two insulating retractable members 4 include a total of four side buckles 422 , which correspond to the four corners of the bar sheet 10 .

[0072] Specifically, the middle buckle 421 is an "L"-shaped structure formed by two plates, which can be buckled on the edge of the bar piece 10. One plate of the middle buckle 421 is located on the upper surface of the bar piece 10, and the other plate is located on the side of the bar piece 10. The middle buckle 421 insulates the edge of the bar piece 10 to prevent the edge of the bar piece 10 from contacting other bar pieces 10 and generating electrical connection.

[0073] See also Figures 1 to 14 As shown, in one embodiment of the present invention, a card slot 4221 is provided on the side buckle 422 , and the card slot 4221 can be clamped at the corner of the tab 10 .

[0074] In this embodiment, the shape of the slot 4221 is adapted to the shape of the corner of the bar sheet 10, and the corner of the bar sheet 10 is inserted into the slot 4221. The side buckle 422 is used to protect the corner of the bar sheet 10 and to limit the horizontal movement space of the insulating film 43 and the rotating shaft 411 to prevent the insulating film 43 and the rotating shaft 411 from moving in the horizontal direction. The horizontal direction is the width direction of the bar sheet 10, that is, Fig.13 The direction perpendicular to the plane (screen) in which the diagram is located.

[0075] Specifically, the first side plate 16 and the second side plate 17 are provided with a bracket 6, and the bracket 6 is located on the side of the first side plate 16 away from the upper plate 15, that is, on the second side of the long hole 12. When the insulating film 43 is in the rolled-up state, the card slot 4221 of the side buckle 422 is clamped on the bracket 6, supported by the bracket 6, and the second connection structure 42 is fixed on the second side of the long hole 12. There are four brackets 6, two brackets 6 are provided on the first side plate 16, and the two brackets 6 correspond to the two side buckles 422 on the same side. Two brackets 6 are also provided on the second side plate 17, and the two brackets 6 correspond to the two side buckles 422 on the same side. The bracket 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 card slot 4221 of the side buckle 422. The first side plate 16, the second side plate 17, the upper plate 15 and the bracket 6 can be an integrally formed structure.

[0076] See also Figures 1 to 14 As shown, in one embodiment of the present invention, the insulating protection device also 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 with the insulating shell 1, and 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 expanded state, the locking structure locks the rotating shaft 411 with the insulating shell 1 to prevent the rotating shaft 411 from rotating relative to the insulating shell 1 due to external force, thereby ensuring that the insulating film 43 can remain in the expanded state and ensuring the stability of the entire insulating protection device.

[0078] See also 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 opened on the insulating shell 1, and the locking block 51 is set 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 provided 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 in its own axial direction relative to the rotating hole 19. During the process of switching the locking structure 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 in a direction close to the locking groove 13, driving the locking block 51 to be inserted into the locking groove 13, locking the rotating shaft 411 and the insulating shell 1, and at this time, the rotating shaft 411 cannot rotate relative to the rotating hole 19; during the process of switching the locking structure from the locked state to the unlocked state, the rotating shaft 411 moves in a direction away from the locking groove 13, driving the locking block 51 to be withdrawn from the locking groove 13, releasing the locking relationship between the rotating shaft 411 and the insulating shell 1, and 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 a plurality of locking grooves 13, for example, six, are opened in the rotating hole 19 corresponding to each rotating shaft 411. The locking grooves 13 are evenly distributed along the circumference of the rotating shaft 411, and each locking groove 13 defines a circumferential position of the rotating shaft 411. When the rotating shaft 411 is rotated until the locking block 51 is aligned with any locking groove 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 groove 13 to complete the locking.

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

[0082] See also Fig.15 As shown, the present invention also provides a battery module, including a bar sheet 10, a wire drum 20, a battery cell 40 and the above-mentioned insulating protection device, the insulating protection device is connected to the bar sheet 10, and the wire drum 20 and the battery cell 40 are both electrically connected to the bar sheet 10.

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

[0084] Specifically, the battery module further includes a wire 30 , and the wire 30 is electrically connected to the wire reel 20 .

[0085] The insulation protection device is connected to the bar 10 in the following manner:

[0086] Place the insulating protective device on the bar 10 so that the connecting hole 11, the center hole 31, the through hole on the wire drum 20 and the threaded hole on the bar 10 are coaxial;

[0087] The connector 2 is used to pass through the connecting hole 11, the center hole 31 and the through hole of the wire drum 20 in sequence, and the connector 2 drives the telescopic membrane 34 to extend in the direction close to the bar piece 10. When the connector 2 is inserted into the threaded hole, the connector 2 is threadedly connected to the bar piece 10 by screwing. At this time, the bottom end surface of the head of the connector 2 presses the pressure ring 32 of the insulating deformable part 3 against the upper surface of the wire drum 20;

[0088] The rotating shaft 411 is rotated by the rotating member 412 to switch the insulating film 43 from the rolled state to the unfolded state, the middle buckle 421 is installed on the edge of the bar sheet 10, and the side buckle 422 is clamped at the corner of the bar sheet 10;

[0089] The rotating shaft 411 is moved along the axial direction of the rotating shaft 411 and in a direction close to the locking groove 13, so that the locking block 51 is inserted into the locking groove 13 aligned with it; the connection between the insulating protection device and the bar 10 is completed.

[0090] The insulation protection device is detached from the bar 10 in the following manner:

[0091] Move the rotating shaft 411 along the axial direction of the rotating shaft 411 and in a direction away from the locking groove 13, so that the locking block 51 is pulled out of the locking groove 13;

[0092] The rotating shaft 411 is rotated by the rotating member 412 to switch the insulating film 43 from the unfolded state to the rolled state, and the side buckle 422 is clamped on the bracket 6;

[0093] The connector 2 is screwed to separate the connector 2 from the bar sheet 10, and the connector 2 is pulled out from the through hole, the center hole 31 and the connecting hole 11 of the cable drum 20 in sequence, and the telescopic film 34 shrinks to form a flat state as the connector 2 moves;

[0094] The insulating protection device is removed from the bar 10 and the disassembly is completed.

[0095] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. An insulation protection device, characterized in that: The insulation protection device comprises: An insulating cover, the insulating cover being configured to cover the bar sheet (10), and a connecting hole (11) being provided at the center of the insulating cover; an insulating deformable member (3), the insulating deformable member (3) being formed into a ring shape having an inner peripheral edge and an outer peripheral edge, the insulating deformable member (3) being fixed to a side of the insulating cover facing the bar sheet (10) via the outer peripheral edge, and the central hole (31) of the insulating deformable member (3) being coaxial with the connecting hole (11), and the aperture of the central hole (31) being smaller than the aperture of the connecting hole (11); and A connecting member (2), wherein the connecting member (2) is configured to be connected to the bar sheet (10) through the connecting hole (11) and the central hole (31), and to stretch and fix the inner periphery of the insulating deformable member (3) to the top surface of the bar sheet (10).

2. The insulation protection device according to claim 1, characterized in that: The insulating deformable member (3) comprises a pressure ring (32) arranged on the inner periphery, a fixing ring (33) arranged on the outer periphery, and a telescopic membrane (34) connected between the pressure ring (32) and the fixing ring (33); and / or, The connecting member (2) comprises a rod and a head, wherein the head is connected to one end of the rod, and an end of the rod facing away from the head is formed with an external thread for threaded connection with the bar (10). The diameter of the head is smaller than the diameter of the connecting hole (11) and larger than the diameter of the center hole (31). The diameter of the rod is smaller than the diameter of the center hole (31). When the connecting member (2) is threadedly connected to the bar (10), the bottom end surface of the head can press the inner circumference of the insulating deformable member (3) against the top surface of the bar (10).

3. The insulation protection device according to claim 2, characterized in that: The head is flush with the top surface of the insulating cover, or the head is recessed into the connecting hole (11); and / or, The insulating protection device also includes an insulating plug, which is connected to the insulating cover and closes the connecting hole (11) and covers the head.

4. The insulation protection device according to any one of claims 1 to 3, characterized in that: The insulating cover comprises an insulating shell (1), the connecting hole (11) is opened on the insulating shell (1), and a receiving space is formed between the insulating shell (1) and the bar (10), and the receiving space can receive a wire reel (20) electrically connected to the bar (10).

5. The insulation protection device according to claim 4, characterized in that: The insulating shell (1) comprises an upper plate (15) and 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) can cover the bar plate (10), the bottom end surfaces of the first side plate (16) and the second side plate (17) can contact the top surface of the bar plate (10), and the accommodating space is defined and formed by the bottom surface of the upper plate (15), the top surface of the bar plate (10) and the inner side surfaces of the first side plate (16) and the second side plate (17); and / or, The insulating cover also includes two insulating retractable parts (4), which are respectively arranged on both sides of the insulating shell (1). The insulating shell (1) is used to cover the middle part of the bar piece (10), and the insulating retractable parts (4) are used to cover the side parts of the bar piece (10).

6. The insulation protection device according to claim 5, characterized in that: The insulating retractable member comprises a first connecting structure (41) for connecting to the insulating shell (1), a second connecting structure (42) for connecting to 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 insulation protection device according to claim 6, characterized in that: The first connection structure (41) comprises a rotating shaft (411), the rotating shaft (411) 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 rolled-up state and an unfolded state by rotating; and / or, The second connection structure (42) includes a middle buckle (421) and a side buckle (422), wherein the middle buckle (421) can cover the edge of the bar sheet (10), and the side buckle (422) can be connected to the corners of the bar sheet (10) and cover the corners of the bar sheet (10).

8. The insulation protection device according to claim 7, characterized in that: The side buckle (422) is provided with a slot (4221), and the slot (4221) can be locked at the corner of the tab (10); and / or, The insulating protection device further comprises a locking structure, which has a locked state and an unlocked state. In the locked state, the locking structure locks the rotating shaft (411) and the insulating shell (1), and in the unlocked state, the locking structure releases the locking relationship between the rotating shaft (411) and the insulating shell (1).

9. The insulation protection device according to claim 8, characterized in that: The locking structure comprises a locking groove (13) and a locking block (51); the locking groove is provided on the insulating shell (1); the locking block (51) is arranged on the rotating shaft (411); in the locked state, the locking block (51) is inserted into the locking groove (13); in the unlocked state, the locking block (51) is pulled out of the locking groove (13).

10. A battery module, characterized in that: It comprises a bar sheet (10), a wire reel (20), a battery cell (40) and an insulating protection device as described in any one of claims 1 to 9, wherein the insulating protection device is connected to the bar sheet (10), and the wire reel (20) and the battery cell (40) are both electrically connected to the bar sheet (10).

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