Insulating part of battery, top cover assembly, battery monomer and electric equipment

Abstract

The utility model relates to a battery insulator, top cover subassembly, battery monomer and electric equipment, including first insulating plate, second insulating plate and clamping subassembly, the second insulating plate has the first end, the first end of second insulating plate and first insulating plate turnably connect, the clamping subassembly connects first insulating plate and second insulating plate, and the clamping subassembly has the first end of second insulating plate and second insulating plate turnably connect. The clamping assembly comprises a first buckling piece and a second buckling piece, the second buckling piece is provided with a rotating piece, the rotating piece of the first buckling piece and the rotating piece of the second buckling piece are connected in a clamped mode, and the rotating piece of the second buckling piece can rotate relative to the first buckling piece in the second direction. The second direction is perpendicular to the first direction, and the first direction is the thickness direction of the first insulating plate. According to the utility model, the first buckling piece and the second buckling piece are not easy to bounce off after being buckled, and the clamping assembly is suitable for being used under the condition that the operation space of the clamping assembly in the parallel direction of the first insulating plate is limited.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an insulating member, a top cover assembly, a battery cell and electrical equipment of a battery. Background Art

[0002] With the development and progress of society, lithium batteries have rapidly entered the public consciousness as a new energy source and are widely used in various fields. As batteries as energy storage devices are gradually gaining social recognition and experiencing rapid development, battery performance and safety are receiving increasing attention. However, inverted tab insertion poses a significant threat to battery safety. Existing technologies often employ methods such as increasing the space for folding the tabs or adding wings to the top cover to prevent inverted tab insertion.

[0003] A Chinese utility model patent with authorization publication number CN220324646U discloses a battery plastic component comprising a plastic body, a liquid injection portion, and a fastening portion. The plastic body comprises a first plastic part and a second plastic part connected to the first plastic part, with the second plastic part disposed below the first plastic part. The liquid injection portion comprises a first liquid injection hole and a second liquid injection hole, and is disposed in the plastic body. The fastening portion comprises a first fastening portion disposed on the first plastic part and a second fastening portion disposed on the second plastic part, the first fastening portion and the second fastening portion being engaged with each other. The liquid injection portion and the fastening portion are arranged along a first direction. In the aforementioned patent, one of the first and second fastening portions is a fastening groove, and the other is an elastic fastening member, which is inserted into the fastening groove to achieve fastening and fixation. The snap-fitting slot has a notch, and the elastic snap-fitting member enters the snap-fitting slot along the height of the battery. If the size difference between the elastic snap-fitting member and the snap-fitting slot is too large, the first and second snap-fitting portions will have difficulty engaging. If the size difference between the elastic snap-fitting member and the snap-fitting slot is small, the elastic snap-fitting member can smoothly enter the snap-fitting slot, but it can also easily fall out of the notch, resulting in slow production and increased defective rates. Improving the production speed and yield of battery insulation components is a technical problem that needs to be solved in this field. Utility Model Content

[0004] To this end, the utility model provides a battery insulating member, a top cover assembly, a battery cell and an electrical device, which can improve the production rhythm and yield rate of the battery insulating member.

[0005] In order to solve the above technical problems, the present invention provides an insulating member for a battery, comprising:

[0006] a first insulating plate;

[0007] a second insulating plate having a first end along its length, the first end of the second insulating plate being reversibly connected to the first insulating plate;

[0008] a clamping assembly connecting the first insulating plate and the second insulating plate; the clamping assembly includes a first fastening member and a second fastening member, one of the first fastening member and the second fastening member is provided on the first insulating plate, and the other is provided on the second insulating plate;

[0009] In which, the second fastening member has a rotating member, the rotating members of the first fastening member and the second fastening member are engaged with each other, and the rotating member of the second fastening member can rotate relative to the first fastening member around a second direction, so that the first fastening member and the second fastening member can switch between a locked state and an unlocked state, the second direction and the first direction are perpendicular to each other, and the first direction is the thickness direction of the first insulating plate.

[0010] Furthermore, the first fastener is provided with a accommodating cavity, and both ends of the accommodating cavity along the direction perpendicular to the first direction pass through the first fastener; the end where the first fastener is connected to the second fastener is provided with a bayonet, and both ends of the bayonet along the direction perpendicular to the first direction pass through the first fastener, and the bayonet is connected to the accommodating cavity.

[0011] Furthermore, the first fastening component includes two connecting arms arranged opposite to each other, both connecting arms are connected to a hook portion, the bayonet is formed between the two hook portions, and the accommodating cavity is formed between the two connecting arms.

[0012] Furthermore, the second fastening member includes a mounting seat, the rotating member includes a clamping portion and a supporting portion, at least one end of the supporting portion along the second direction is connected to the clamping portion, and the supporting portion and the mounting seat are rotatably connected so that the rotating member and the first fastening member can switch between a locked state and an unlocked state.

[0013] Furthermore, both ends of the accommodating cavity along the third direction and both ends of the bayonet along the third direction pass through the first fastening component, and the third direction and the second direction are perpendicular to each other.

[0014] Further, the clamping portion includes a first clamping section and a second clamping section, one end of the support portion along the second direction is connected to the first clamping section, part of the outer peripheral surface of the first clamping section is connected to the second clamping section, the first clamping section and the bayonet are plug-fitted, and the second clamping section and the accommodating cavity are plug-fitted, wherein, in the second direction, the width of the first clamping section is smaller than the width of the second clamping section, the width of the bayonet is smaller than the width of the accommodating cavity, and at least part of the second clamping section cannot pass through the bayonet.

[0015] Furthermore, the mounting seat is provided on the second insulating plate, and an avoidance hole is provided at a position of the second insulating plate facing the clamping portion.

[0016] The utility model also provides a top cover assembly, comprising a cover plate and the insulating member, wherein the cover plate and the first insulating plate are stacked; the second insulating plate is located on a side of the first insulating plate away from the cover plate.

[0017] The utility model also provides a battery cell, comprising the top cover assembly.

[0018] The utility model also provides an electrical device comprising the battery monomer.

[0019] The above technical solution of the present invention has the following advantages over the prior art: the insulating part, top cover assembly, battery cell and electrical equipment of the battery described in the present invention, the insulating part includes a first insulating plate and a second insulating plate, the second insulating plate can be folded and connected to the first insulating plate, and the first fastening part and the second fastening part are respectively arranged on the second insulating plate and the first insulating plate. Since the first fastening part and the second fastening part can be unlocked and locked by rotating the rotating part around the second direction, the first fastening part and the second fastening part are easy to fasten together, and the first fastening part and the second fastening part are not easy to detach and bounce off each other along the thickness direction of the first insulating plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0021] Figure 1 It is a three-dimensional diagram of the insulating member in the present utility model;

[0022] Figure 2 A bottom view of the first fastening member and the second fastening member of the present invention when they are in the unlocked state;

[0023] Figure 3 for Figure 2 Schematic diagram of the AA section;

[0024] Figure 4 for Figure 2 Schematic diagram of the middle BB section;

[0025] Figure 5 for Figure 4 A partial enlarged view of point C in the middle;

[0026] Figure 6 This is a bottom view of the first fastening member and the second fastening member of the present invention when they are in a locked state;

[0027] Figure 7 for Figure 6 Schematic diagram of the middle DD section;

[0028] Figure 8 for Figure 6 Schematic diagram of the EE section;

[0029] Figure 9 for Figure 8 A partial enlarged view of point F in the middle;

[0030] Figure 10 is a three-dimensional diagram of the second fastening member in the present invention;

[0031] Figure 11 This is a three-dimensional diagram of the second insulating plate and the second fastening member connected in the present invention;

[0032] Figure 12 This is a three-dimensional diagram of the second insulating plate and the second fastening member connected in the present invention;

[0033] Figure 13 It is a schematic diagram of the battery in the present utility model.

[0034] Explanation of the reference numerals in the specification: 1. First insulating plate; 2. Second insulating plate; 21. Avoidance hole; 3. First fastening member; 31. Accommodating cavity; 32. Bayonet; 33. Connecting arm; 34. Hook; 4. Second fastening member; 41. Clamping portion; 411. First clamping section; 412. Second clamping section; 42. Supporting portion; 5. Shell; 6. Battery cell; 7. Cover plate; 71. Pole; 8. Adapter; 9. Coating film; 10. Bottom support plate; 11. Upper plastic part; 12. Explosion-proof valve patch; 13. Explosion-proof valve; 14. Sealing ring. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0036] See also Figures 1 to 12 As shown, an embodiment of the insulating member of the battery provided by the utility model.

[0037] The insulating member of the above battery includes:

[0038] a first insulating plate 1;

[0039] A second insulating plate 2 has a first end along its length, and the first end of the second insulating plate 2 is reversibly connected to the first insulating plate;

[0040] A clamping assembly connecting the first insulating plate 1 and the second insulating plate 2; the clamping assembly includes a first fastening member 3 and a second fastening member 4, one of the first fastening member 3 and the second fastening member 4 being provided on the first insulating plate 1 and the other being provided on the second insulating plate 2;

[0041] Among them, the above-mentioned second fastening component 4 has a rotating component, the above-mentioned first fastening component 3 and the rotating component of the above-mentioned second fastening component 4 are engaged with each other, and the rotating component of the above-mentioned second fastening component 4 can rotate relative to the above-mentioned first fastening component 3 around the second direction, so that the above-mentioned first fastening component 3 and the above-mentioned second fastening component 4 can switch between the locked state and the unlocked state. The above-mentioned second direction and the first direction are perpendicular to each other, and the above-mentioned first direction is the thickness direction of the above-mentioned first insulating plate 1.

[0042] The second insulating plate 2 can be folded and connected to the first insulating plate 1, that is, the angle between the second insulating plate 2 and the first insulating plate 1 can be changed. When the angle between the second insulating plate 2 and the first insulating plate 1 becomes smaller, the insulating parts are closed, and when the angle between the second insulating plate 2 and the first insulating plate 1 becomes larger, the insulating parts are unfolded.

[0043] After the insulating members are closed, the rotating member of the second fastening member 4 is rotated, causing it to rotate in place about the second direction. After rotating a certain angle, it interlocks with the first fastening member 3, forming a locked state. At this time, the first fastening member 3 and the second fastening member 4 cannot separate or bounce away from each other along the thickness direction of the first insulating plate 1. The application of the above-mentioned insulating members will be explained below in conjunction with other battery structures.

[0044] Since the rotating part of the above-mentioned second fastening member 4 does not move along the thickness direction of the first insulating plate 1 to achieve locking and unlocking with the first fastening member 3, the contact area between the first fastening member 3 and the second fastening member 4 along the thickness direction of the first insulating plate 1 can be larger. In this way, the first fastening member 3 and the second fastening member 4 are not easy to detach and bounce off each other along the thickness direction of the first insulating plate 1.

[0045] Furthermore, in this embodiment, the first fastener 3 is provided with a receiving cavity 31, and the receiving cavity 31 passes through the first fastener 3 at both ends perpendicular to the first direction; the end at which the first fastener 3 is connected to the second fastener 4 is provided with a bayonet 32, and the bayonet 32 ​​passes through the first fastener 3 at both ends perpendicular to the first direction, and the bayonet 32 ​​is connected to the receiving cavity 31.

[0046] Specifically in this embodiment, see Figure 7 As shown, the first fastening member 3 includes two connecting arms 33 arranged opposite to each other, both connecting arms 33 are connected to a hook portion 34 , the bayonet 32 ​​is formed between the two hook portions 34 , and the accommodating cavity 31 is formed between the two connecting arms 33 .

[0047] It should be noted that, in this specific embodiment, the first fastening member 3 is integrally formed on the first insulating plate 1 , that is, the two connecting arms 33 are integrally formed on the first insulating plate 1 , and the hook portion 34 and the connecting arm 33 are integrally formed.

[0048] It should also be noted that, in this specific embodiment, both ends of the accommodating cavity 31 along the third direction and both ends of the bayonet 32 ​​along the third direction pass through the first fastening component 3 , and the third direction and the second direction are perpendicular to each other.

[0049] Furthermore, in this embodiment, the second fastening member 4 includes a mounting seat, the rotating member includes a clamping portion 41 and a supporting portion 42, at least one end of the supporting portion 42 along the second direction is connected to the clamping portion 41, and the supporting portion 42 and the mounting seat are rotatably connected so that the rotating member and the first fastening member 3 can switch between a locked state and an unlocked state.

[0050] Specifically in this embodiment, see Figure 11 and 12 The mounting seat can be a part of the second insulating plate 2, and an avoidance hole 21 that passes through the mounting seat is provided at a position of the mounting seat opposite to the clamping portion 41; a mounting groove extending along the second direction is provided on the side of the mounting seat away from the first insulating plate 1, and the mounting groove is connected to the avoidance hole 21; the support portion 42 of the rotating member is rotatably installed in the mounting groove. It can be seen that, on the one hand, the second fastening member 4 has a simple structure and is quick to install. On the other hand, the space occupied by the second fastening member 4 in the thickness direction is minimized, thereby reducing the occupation of the internal space of the battery casing.

[0051] It should be noted that in order to ensure the stability of the installation of the rotating part, support parts 42 are provided on both sides of the clamping part 41 in the second direction, and two installation grooves arranged opposite to each other along the second direction are provided on the side of the mounting seat away from the first insulating plate 1, and both installation grooves are connected to the avoidance hole 21.

[0052] There are multiple matching structures for the second fastening member 4 and the first fastening member 3. One is that after the insulating member is closed, the clamping portion 41 of the rotating member can enter the accommodating cavity 31 from the clamping port 32, and then the rotating member is driven to rotate to ensure that the clamping portion 41 cannot fall off from the clamping port 32 along the thickness direction of the first insulating plate 1. In order to allow the clamping portion 41 to enter from the clamping port 32 and not fall off from the clamping port 32 after rotation, the width and thickness of the clamping portion 41 can be designed to be different, that is, the cross-section of the clamping portion 41 is waist-shaped, the length direction of the clamping portion is the second direction, and the difference between the width and thickness of the clamping portion 41 is designed to be large. In this way, even if there is a dimensional processing error between the first fastening member and the second fastening member, the first fastening member 3 and the second fastening member 4 will not detach from each other and bounce off along the thickness direction of the first insulating plate 1.

[0053] The other is that after the insulating member is closed, the rotating member and the first fastening member 3 are independently arranged (see Figure 3 and Figure 5 As shown), the rotating member is driven to rotate, so that a part of the clamping portion 41 enters the accommodating cavity 31 from the end of the above-mentioned accommodating cavity 31 along the first direction perpendicular to the first direction. At the same time, the other part of the clamping portion 41 enters the bayonet 32 ​​from the end of the above-mentioned bayonet 32 ​​along the first direction perpendicular to the first direction. When the rotating member is rotated to the right position, a part of the clamping portion 41 is inserted into the accommodating cavity 31, and the other part of the clamping portion 41 is inserted into the bayonet 32 ​​(see Figure 7 and Figure 9 As shown), as long as the portion of the snap-fitting portion 41 that cooperates with the accommodating cavity can pass through the accommodating cavity, and the portion of the snap-fitting portion 41 that cooperates with the bayonet can pass through the bayonet, the snap-fitting can be achieved. Therefore, the size of the portion of the snap-fitting portion 41 that cooperates with the accommodating cavity can be designed to be much larger than the size of the bayonet. In this way, even if there is a dimensional processing error between the first fastening member and the second fastening member, the first fastening member 3 and the second fastening member 4 will not detach from each other and bounce off along the thickness direction of the first insulating plate 1.

[0054] Specifically in this embodiment, see Figure 10 The above-mentioned clamping portion 41 includes a first clamping segment 411 and a second clamping segment 412. One end of the above-mentioned support portion 42 along the second direction is connected to the above-mentioned first clamping segment 411. Part of the outer peripheral surface of the above-mentioned first clamping segment 411 is connected to the above-mentioned second clamping segment 412. The above-mentioned first clamping segment 411 and the above-mentioned bayonet 32 ​​are plug-fitted, and the above-mentioned second clamping segment 412 and the above-mentioned accommodating cavity 31 are plug-fitted. In the second direction, the width of the above-mentioned first clamping segment 411 is smaller than the width of the above-mentioned second clamping segment 412, the width of the above-mentioned bayonet 32 ​​is smaller than the width of the above-mentioned accommodating cavity 31, and at least part of the above-mentioned second clamping segment 412 cannot pass through the above-mentioned bayonet 32.

[0055] It should be noted that, in this specific embodiment, the rotating member is an integrally formed structure, the first clamping section 411 is semicircular, and the second clamping section 412 is semicircular.

[0056] The following introduces a top cover assembly, including a cover plate and the above-mentioned insulating member, wherein the cover plate and the above-mentioned first insulating plate 1 are stacked; the above-mentioned second insulating plate 2 is located on a side of the above-mentioned first insulating plate 1 away from the above-mentioned cover plate.

[0057] The cover plate and the first insulating plate 1 are aligned in length, width, and thickness. Both the cover plate and the first insulating plate 1 are provided with a terminal post hole extending through their thickness. The terminals are fixed relative to the cover plate and pass through the terminal post holes in the cover plate and the first insulating plate 1. The application of the top cover assembly will be described below in conjunction with other battery structures.

[0058] See also Figure 13 FIG. 1 shows an embodiment of a battery cell disclosed in the present invention.

[0059] The battery cell mainly includes a shell 5, a battery cell 6, a cover plate 7 and an electrolyte. The battery cell 6 and the electrolyte are arranged in the shell 5. The pole ear led out of the battery cell 6 is electrically connected to the pole 71 on the cover plate 7. The above-mentioned insulating part is a lower plastic part arranged between the battery cell 6 and the cover plate 7. The outer side of the battery cell 6 is covered with a covering film 9. A bottom support plate 10 is arranged between the bottom of the battery cell 6 and the shell 5. An upper plastic part 11 and a sealing ring 14 are arranged between the above-mentioned pole 71 and the pole hole of the cover plate 7. The above-mentioned cover plate 7 is also provided with an explosion-proof valve patch 12 and an explosion-proof valve 13.

[0060] During the connection process of the tab of the battery cell 6 and the pole 71 of the cover plate 7, a certain angle space is formed between the second insulating plate 2 and the first insulating plate 1 (to facilitate the connection of the tab and the pole), the first fastener 3 and the second fastener 4 are not in contact, and the tab bypasses the second insulating plate 2 and is connected to the pole through the adapter 8. After the pole is connected to the tab, the second insulating plate 2 is first brought close to the first insulating plate 1 until the angle between the two is small or parallel to each other, and then the rotating part of the second fastener 4 is rotated. The rotating part of the second fastener 4 rotates in place around the second direction, and after rotating at a certain angle, it is engaged with the first fastener 3 and is in a locked state. At this time, the first fastener 3 and the second fastener 4 cannot be separated from each other along the thickness direction of the first insulating plate 1. The second insulating plate 2 fixes and supports the tab of the battery cell to prevent the weld from being pulled and broken, and also prevents welding slag from falling into the battery cell, thereby ensuring the safety of the battery cell.

[0061] The following describes an electrical device, including the above-mentioned battery cell. The above-mentioned electrical device can be a car, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The car can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or an extended-range car, and the like; the spacecraft includes airplanes, rockets, space shuttles, and spacecraft, and the like; the electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0062] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A battery insulating member, characterized in that: include: a first insulating plate (1); A second insulating plate (2) having a first end along its length direction, the first end of the second insulating plate (2) being connected to the first insulating plate in a flippable manner; A snap-fit ​​assembly connects the first insulating plate (1) and the second insulating plate (2); the snap-fit ​​assembly comprises a first fastening member (3) and a second fastening member (4); one of the first fastening member (3) and the second fastening member (4) is arranged on the first insulating plate (1), and the other is arranged on the second insulating plate (2); The second fastening member (4) has a rotating member, the rotating members of the first fastening member (3) and the second fastening member (4) are engaged with each other, and the rotating member of the second fastening member (4) can rotate relative to the first fastening member (3) around a second direction, so that the first fastening member (3) and the second fastening member (4) can switch between a locked state and an unlocked state, the second direction and the first direction are perpendicular to each other, and the first direction is the thickness direction of the first insulating plate (1).

2. The insulating member according to claim 1, wherein The first fastening member (3) is provided with a receiving cavity (31), and both ends of the receiving cavity (31) along a direction perpendicular to the first direction pass through the first fastening member (3); one end of the first fastening member (3) connected to the second fastening member (4) is provided with a bayonet (32), and both ends of the bayonet (32) along a direction perpendicular to the first direction pass through the first fastening member (3), and the bayonet (32) is communicated with the receiving cavity (31).

3. The insulating member according to claim 2, wherein: The first fastening member (3) comprises two connecting arms (33) arranged opposite to each other, the two connecting arms (33) are both connected to a hook portion (34), the bayonet (32) is formed between the two hook portions (34), and the accommodating cavity (31) is formed between the two connecting arms (33).

4. The insulating member according to claim 2 or 3, characterized in that: The second fastening member (4) includes a mounting seat, and the rotating member includes a clamping portion (41) and a supporting portion (42), at least one end of the supporting portion (42) along the second direction is connected to the clamping portion (41), and the supporting portion (42) and the mounting seat are rotatably connected to enable the rotating member and the first fastening member (3) to switch between a locked state and an unlocked state.

5. The insulating member according to claim 4, wherein: Both ends of the accommodating cavity (31) along the third direction and both ends of the bayonet (32) along the third direction pass through the first fastening component (3), and the third direction and the second direction are perpendicular to each other.

6. The insulating member according to claim 5, wherein: The clamping portion (41) includes a first clamping section (411) and a second clamping section (412); one end of the support portion (42) along the second direction is connected to the first clamping section (411); a portion of the outer peripheral surface of the first clamping section (411) is connected to the second clamping section (412); the first clamping section (411) and the bayonet (32) are plug-fitted; the second clamping section (412) and the accommodating cavity (31) are plug-fitted; wherein, in the second direction, the width of the first clamping section (411) is smaller than the width of the second clamping section (412); the width of the bayonet (32) is smaller than the width of the accommodating cavity (31); and at least a portion of the second clamping section (412) cannot pass through the bayonet (32).

7. The insulating member according to claim 4, wherein: The mounting seat is arranged on the second insulating plate (2), and a avoidance hole (21) is provided at a position of the second insulating plate (2) facing the clamping portion (41).

8. A top cover assembly, comprising a cover plate (7) and an insulating member according to any one of claims 1 to 7, wherein the cover plate (7) and the first insulating plate (1) are stacked; and the second insulating plate (2) is located on a side of the first insulating plate (1) away from the cover plate (7).

9. A battery cell comprising the top cover assembly according to claim 8.

10. An electrical device comprising the battery cell according to claim 9.

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