Top cover, battery and electric equipment

Abstract

The utility model relates to a top cover, a battery and electric equipment, and the top cover comprises a cover plate sheet which is provided with at least one first pole hole along the thickness direction of the cover plate sheet; the cover plate sheet is provided with a first surface and a second surface, and the second surface of the cover plate sheet is provided with at least one sinking table corresponding to the position of the first pole hole; the first supporting piece is provided with at least one second pole hole corresponding to the first pole hole in position along the thickness direction of the first supporting piece; the first supporting piece is provided with a first surface and a second surface; the first surface of the first supporting piece is attached to the second surface of the cover plate piece. A boss protruding towards the cover plate sheet is formed on the second surface of the first supporting piece around the second pole hole; the boss extends into the sinking table and abuts against the sinking table in an insulating mode. Each pole is correspondingly mounted in one first pole hole and one second pole hole; the sealing ring is sleeved on the pole; and the sealing ring is filled in a space formed between the cover plate sheet and the pole. Supporting is provided for expansion and compression of the sealing ring, and the sealing performance of the sealing ring is improved.

Description

Technical Field

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

[0002] The sealing ring of the battery terminal is a key component to ensure battery safety and reliability. Its function is to prevent electrolyte leakage and the intrusion of external impurities. If the sealing performance of the sealing ring is poor, it may be caused by the following reasons:

[0003] 1. Design defects: There may be defects in the design of the sealing ring, such as improper fit between the sealing ring and the terminal or battery cover, resulting in the inability to form an effective seal.

[0004] 2. Improper installation: If the sealing ring is damaged during installation or is not correctly placed between the pole and the battery cover, its sealing effect will also be affected.

[0005] 3. Poor compression of the sealing ring: If the compression of the sealing ring is insufficient, it may not be able to form close contact with the pole and battery cover, resulting in poor sealing.

[0006] Therefore, in order to improve the sealing performance of the battery pole, it is urgent to design a top cover that ensures good fit between the sealing ring, the pole and the battery cover. Utility Model Content

[0007] In view of the deficiencies in the prior art, the utility model discloses a top cover, a battery and an electrical device.

[0008] The technical solutions adopted in this utility model are as follows:

[0009] In a first aspect, a top cover is provided, comprising:

[0010] A cover plate is provided with at least one first pole hole along its thickness direction; the cover plate has a first surface and a second surface, and the second surface of the cover plate is provided with at least one recessed platform corresponding to the position of the first pole hole;

[0011] A first support member is provided with at least one second pole hole along its thickness direction corresponding to the position of the first pole hole; the first support member has a first surface and a second surface; the first surface of the first support member is in contact with the second surface of the cover plate; a boss is formed on the second surface of the first support member surrounding the second pole hole and protruding toward the cover plate; the boss extends into the sink and is insulated from and abuts against the sink.

[0012] At least one pole, each pole is installed in a first pole hole and a second pole hole respectively;

[0013] A sealing ring is sleeved on the pole; the sealing ring fills the space formed between the cover plate and the pole.

[0014] In one embodiment of the present invention, the pole includes a pole head, a column body and a column bottom; the diameter of the pole head is larger than the diameter of the column body, and the diameter of the column body is smaller than the diameter of the column bottom; the sealing ring is sleeved on the column body, and the column bottom supports the sealing ring.

[0015] In one embodiment of the present invention, a first supporting portion and a second supporting portion away from the cover plate are formed on the second surface of the first supporting member; and both the first supporting portion and the second supporting portion are provided with electrolyte flow channels.

[0016] In one embodiment of the present invention, the cover plate is provided with a liquid injection hole; a negative pressure rubber plug is provided in the liquid injection hole; and a sealing sheet is covered on the surface of the liquid injection hole.

[0017] In one embodiment of the present invention, the sealing sheet includes a base sheet; a plurality of protrusions are provided along the circumference of the base sheet.

[0018] In one embodiment of the present invention, the distribution angle of the plurality of protrusions is 15°-90°; and the number of the protrusions is ≥4.

[0019] In one embodiment of the present invention, the cover plate is provided with a safety valve; and a protection sheet is provided on the safety valve.

[0020] In one embodiment of the present invention, it further includes a second support member provided on the cover plate and an outer conductive block provided on the second support member; the pole passes through the second support member and the outer conductive block in sequence.

[0021] In a second aspect, a battery is provided, comprising:

[0022] a housing having an opening;

[0023] a battery cell, housed in the housing; and

[0024] The top cover provided in the first aspect is buckled into the opening.

[0025] In a third aspect, an electrical device is provided, comprising the battery provided in the second aspect.

[0026] The above technical solution of the utility model has the following advantages compared with the prior art:

[0027] The sealing ring in the top cover of the utility model is properly matched with the pole and the cover plate, ensuring good matching between the sealing ring, the pole and the battery cover.

[0028] The top cover of the utility model can ensure that the sealing ring is correctly placed between the pole and the cover plate, and the sealing ring is compressed sufficiently to form a close contact with the pole and the cover plate, thereby ensuring the sealing effect of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] Figure 1 It is a structural schematic diagram of the top cover in the utility model.

[0031] Figure 2 It is an exploded view of the top cover of the utility model.

[0032] Figure 3 It is a top view of the top cover in the utility model.

[0033] Figure 4 yes Figure 3 Cross-section view at AA in the middle.

[0034] Figure 5 yes Figure 4 Enlarged schematic diagram of point B in the middle.

[0035] Figure 6 It is a structural diagram of the cover plate in the utility model.

[0036] Figure 7 It is a structural schematic diagram of the insulating support member in the utility model.

[0037] Figure 8 It is a structural diagram of the pole in the utility model.

[0038] Figure 9 It is a schematic diagram of the sealing piece in the utility model.

[0039] Figure 10 yes Figure 9 Enlarged schematic diagram of point C in the middle.

[0040] Figure 11 It is an exploded view of the battery in the present utility model.

[0041] Description of the accompanying drawings:

[0042] 100, top cover; 101, cover plate; 1011, sink; 102, first support member; 1021, boss; 1022, first support portion; 1023, second support portion; 103, outer conductive block; 104, second support member; 105, pole; 1051, pole head; 1052, pole body; 1053, pole bottom; 106, sealing ring; 107, sealing plate; 1071, substrate; 1072, bump; 108, negative pressure rubber plug; 109, protective plate; 110, safety valve;

[0043] 200, battery cells;

[0044] 300. Shell. DETAILED DESCRIPTION

[0045] 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.

[0046] The aforementioned and other technical aspects, features, and functions of the present invention will be more clearly demonstrated in the following detailed description of the embodiments with reference to the accompanying drawings. Directional terms such as up, down, left, right, front, and back, used in the following embodiments, are merely references to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes only and are not intended to limit the present invention. Furthermore, throughout the embodiments, identical reference numerals denote identical components.

[0047] Example 1

[0048] Combine Figures 1 to 7 , a top cover, comprising:

[0049] The cover plate 101 is provided with at least one first pole hole along its thickness direction; the cover plate 101 has a first surface and a second surface, and the second surface of the cover plate 101 is provided with at least one recessed platform 1011 corresponding to the position of the first pole hole;

[0050] The first support member 102 is provided with at least one second pole hole along its thickness corresponding to the position of the first pole hole. The first support member 102 has a first surface and a second surface. The first surface of the first support member 102 is in contact with the second surface of the cover plate 101. A boss 1021 is formed on the second surface of the first support member 102, surrounding the second pole hole, and protruding toward the cover plate 101. The boss 1021 extends into the sink 1011 and is insulated from and abuts against the sink 1011.

[0051] At least one pole 105, each pole 105 is correspondingly installed in a first pole hole and a second pole hole;

[0052] The sealing ring 106 is sleeved on the pole 105 ; the sealing ring 106 fills the space formed between the cover plate 101 and the pole 105 .

[0053] This embodiment provides a top cover in which the boss 1021 of the first support member 102 extends into the recessed portion 1011 of the cover plate 101, forming a chimeric connection between the cover plate 101 and the first support member 102. This provides support for the expansion and compression of the sealing ring 106 and also acts as an insulator. The recessed portion 1011 contacts the boss 1021, forming an installation space between the recessed portion 1011 and the boss 1021. The sealing ring 106 can be filled in this installation space, further enhancing the restraining force on the sealing ring 106 and thus improving the sealing performance of the sealing ring 106.

[0054] In this embodiment, the cover plate 101 is provided with an injection hole, which is used to inject electrolyte into the battery. A negative pressure plug 108 is provided in the injection hole. The surface of the injection hole is covered with a sealing sheet 107. During the injection process of the battery, the negative pressure plug 108 can ensure that a negative pressure state is formed and maintained inside the battery, which helps the electrolyte to better penetrate into the battery pole piece, improve the infiltration effect of the electrolyte, and also prevent the entry of external gas and moisture, ensuring the stability of the internal environment of the battery. The function of the sealing sheet 107 is to seal the injection hole after the battery injection is completed to prevent the electrolyte from leaking during the use or storage of the battery, thereby ensuring the safety and reliability of the battery.

[0055] Specifically, combined Figure 9 and Figure 10 Sealing sheet 107 includes a base sheet 1071. Multiple bumps 1072 are provided along the circumference of base sheet 1071. This design improves sealing yield. The use of multiple bumps 1072 compensates for the smaller size of small cells, which can cause deformation of the sealing hole due to heat after welding, leading to poor welding such as separation or warping of base sheet 1071 and safety valve 110.

[0056] Furthermore, the distribution angle of the plurality of bumps 1072 is 15°-90°. The number of bumps 1072 is ≥4. The plurality of bumps 1072 can provide additional contact area to ensure high consistency of the gap between the sealing sheet 107 and the top cover 100, preventing inconsistent gaps during laser welding from causing yield differences. In addition, the plurality of bumps 1072 can serve as a reinforcement structure for the sealing sheet 107, improving the mechanical strength of the sealing sheet 107, ensuring that the tensile stress during welding is uniform, and preventing deformation or damage caused by uneven thermal stress.

[0057] In this embodiment, the cover plate 101 is provided with a safety valve 110. A protective sheet 109 is provided on the safety valve 110. The safety valve 110 provides a safe pressure release channel when the internal pressure of the battery increases abnormally. This timely pressure release effectively prevents the battery from exploding due to excessive internal pressure, ensuring safe battery operation. The protective sheet 109 prevents hard objects from accidentally puncturing or damaging the safety valve 110 during battery assembly, transportation, or use, thereby ensuring safe battery operation.

[0058] In this embodiment, the top cover further includes a second support member 104 disposed on the cover plate 101 and an outer conductive block 103 disposed on the second support member 104. The pole 105 sequentially passes through the second support member 104 and the outer conductive block 103. Specifically, the outer conductive block 103 adopts a T-shaped structure. This T-shaped design increases the effective area for battery module connection and improves the connection's current capacity.

[0059] In this embodiment, there are two poles 105 with opposite polarities. Figure 8 As shown, the pole 105 includes a pole head 1051, a pole body 1052, and a pole base 1053. The diameter of the pole head 1051 is larger than that of the pole body 1052, and the diameter of the pole body 1052 is smaller than that of the pole base 1053. The sealing ring 106 is sleeved on the pole body 1052, and the pole base 1053 supports the sealing ring 106.

[0060] In this embodiment, if Figure 7 As shown, the second surface of the first support member 102 is formed with a first support portion 1022 and a second support portion 1023, which are spaced apart from the cover plate 101. Both the first support portion 1022 and the second support portion 1023 are provided with electrolyte circulation channels. The electrolyte circulation channels extend along the length of the first support portion 1022 or the second support portion 1023. The electrolyte circulation channels facilitate uniform distribution of the electrolyte within the battery, ensuring that all parts of the battery are fully wetted, thereby improving the overall performance and service life of the battery.

[0061] The design principles of this embodiment are as follows:

[0062] The boss 1021 of the first support member 102 extends into the sink 1011 of the cover plate 101, so that the cover plate 101 and the first support member 102 form a chimeric connection, providing support for the expansion and compression of the sealing ring 106 and also playing an insulating role.

[0063] In addition, the sink 1011 is in contact with the boss 1021, and an installation space is formed between the sink 1011 and the boss 1021. The sealing ring 106 can be filled in the installation space, further enhancing the restraint force on the sealing ring 106, thereby improving the sealing performance of the sealing ring 106.

[0064] Example 2

[0065] like Figure 11 As shown, this embodiment provides a battery, comprising: a housing 300, a battery cell 200, and a top cover 100 as provided in the first embodiment. The housing 300 has an open end. The battery cell 200 is installed in the housing 300. The top cover 100 is snap-fitted to the open end of the housing 300.

[0066] Specifically, the battery cell 200 is composed of a wound positive electrode sheet, a separator, and a negative electrode sheet. Furthermore, the battery cell 200 utilizes an integrated internal connection method, eliminating the need for a separate adapter, thus avoiding the risk of overheating caused by inserting an adapter into the battery cell 200. This integrated connection solution improves internal battery space utilization by 3%-8%, thereby increasing the capacity of the battery cell 200.

[0067] Since the battery provided in this embodiment includes the top cover provided in the first embodiment, the battery also has all the beneficial effects thereof, which will not be described in detail.

[0068] Example 3

[0069] This embodiment provides an electrical device including the battery provided in embodiment 2. The main design point of the present invention is the structural improvement of the top cover, and other structures of the electrical device, such as the electrical connection part and the mechanical structure part of the electrical device, will not be described in detail.

[0070] Electrical equipment can be cars, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Cars can be fuel cars, gas cars, or new energy cars. New energy cars can be pure electric cars, hybrid cars, or extended-range cars, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. 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, etc. The embodiments of the present invention do not impose any special restrictions on the above-mentioned electrical equipment.

[0071] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0072] 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 readily 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 top cover, characterized in that: include: A cover plate (101) is provided with at least one first pole hole along its thickness direction; the cover plate (101) has a first surface and a second surface, and the second surface of the cover plate (101) is provided with at least one sink (1011) corresponding to the position of the first pole hole; A first support member (102) is provided with at least one second pole hole corresponding to the position of the first pole hole along its thickness direction; the first support member (102) has a first surface and a second surface; the first surface of the first support member (102) is in contact with the second surface of the cover plate (101); a boss (1021) is formed on the second surface of the first support member (102) around the second pole hole and protrudes toward the cover plate (101); the boss (1021) extends into the sink (1011) and is insulated from and abutted against the sink (1011); At least one pole (105), each pole (105) being correspondingly mounted in a first pole hole and a second pole hole; A sealing ring (106) is sleeved on the pole (105); the sealing ring (106) is filled in the space formed between the cover plate (101) and the pole (105).

2. The top cover according to claim 1, wherein: The pole (105) comprises a pole head (1051), a column body (1052) and a column base (1053); the diameter of the pole head (1051) is larger than the diameter of the column body (1052), and the diameter of the column body (1052) is smaller than the diameter of the column base (1053); the sealing ring (106) is sleeved on the column body (1052), and the column base (1053) supports the sealing ring (106).

3. The top cover according to claim 1, wherein: The second surface of the first support member (102) is formed with a first support portion (1022) and a second support portion (1023) away from the cover plate (101); the first support portion (1022) and the second support portion (1023) are both provided with electrolyte circulation channels.

4. The top cover according to claim 1, wherein: The cover plate (101) is provided with a liquid injection hole; a negative pressure rubber plug (108) is provided in the liquid injection hole; and the surface of the liquid injection hole is covered with a sealing sheet (107).

5. The top cover according to claim 4, characterized in that The sealing sheet (107) comprises a base sheet (1071); a plurality of protrusions (1072) are provided along the circumference of the base sheet (1071).

6. The top cover according to claim 5, characterized in that: The distribution angle of the plurality of convex points (1072) is 15°-90°; the number of the convex points (1072) is ≥4.

7. The top cover according to claim 1, wherein: The cover plate (101) is provided with a safety valve (110); and a protection sheet (109) is provided on the safety valve (110).

8. The top cover according to claim 1, wherein: It also includes a second support member (104) provided on the cover plate (101) and an outer conductive block (103) provided on the second support member (104); the pole (105) passes through the second support member (104) and the outer conductive block (103) in sequence.

9. A battery, characterized in that: include: a housing (300) having an opening; The battery cell (200) is accommodated in the housing (300); as well as The top cover (100) according to any one of claims 1 to 8, snapped onto the opening.

10. An electrical device, characterized in that: Comprising the battery of claim 9.

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