A lithium battery protection plate assembly and a lithium battery

Abstract

The utility model relates to lithium battery and protection plate technical field especially, a kind of lithium battery protection plate assembly and lithium battery, the lithium battery protection plate assembly and lithium battery include: protective shell, the top end of protective shell is embedded with sealing gasket, the top end of protective shell is fixedly connected with plug rod in four corners, the outside of multiple plug rods is inserted with cover plate, the outside of plug rod is connected with nut, the inside of protective shell is equipped with multiple battery jacks, the top end of protective shell is equipped with slot, the inner wall of slot is fitted with PCB board, the top end of PCB board is provided with multiple electronic components, the inside wall of protective shell outside is equipped with multiple heat dissipation holesThe lithium battery protection plate assembly and lithium battery provided by the utility model save the cumbersome step of fixing protection plate separately, greatly shorten assembly time, reduce artificial cost, especially suitable for mass production scene, effectively avoid PCB board installation and fixed deformation due to uneven stress and weld cracking, improve the overall reliability and service life of product.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery and protection board technical field especially relates to a kind of lithium battery protection board assembly and lithium battery. BACKGROUND

[0002] Lithium battery is a kind of high-energy-density battery with lithium metal or lithium ion as core, widely used in electronic equipment, new energy vehicle and other fields. It needs protection board, because lithium battery overcharge, overdischarge, overcurrent or short circuit may appear bulge, fire even explosion and other security risks, protection board can monitor battery state in real time, trigger power-off protection, prevent single battery voltage imbalance from affecting overall performance and service life, is the key component to guarantee lithium battery safe and stable use.

[0003] At present, most of lithium battery and protection board are usually installed in lithium battery protection shell when using, since lithium battery and protection board are welded integrally, when installing, lithium battery is placed in corresponding slot, and protection board is also placed in corresponding slot, after being placed, PCB on protection board is fixed in protection shell using small screw, then cover plate is installed and bolted again, so that not only operation is cumbersome, steps are many, but also there are problems of low efficiency, PCB is easily damaged, and maintenance needs to repeat too many steps, in turn, maintenance is inconvenient.

[0004] Therefore, it is necessary to provide a new lithium battery protection board assembly and lithium battery to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a kind of lithium battery protection board assembly and lithium battery.

[0006] The lithium battery protection board assembly provided by the utility model includes: protection shell, sealing gasket is embedded in the top end of the protection shell, plug rod is fixedly connected at the top end of the protection shell, cover plate is inserted on the outside of multiple plug rods, nut is screw-connected on the outside of plug rod, multiple battery insertion holes are arranged in the inside of the protection shell, insertion slot is arranged at the top end of the protection shell, PCB is fitted in the inner wall of insertion slot, multiple electronic elements are arranged at the top end of PCB, multiple heat dissipation holes are arranged in the inner wall of the outside of the protection shell, multiple sliding rods are slidingly connected in the inner wall of the cover plate, stress disc is fixedly connected at the bottom end of sliding rod, rubber pad is fixedly connected at the side, away from sliding rod, of stress disc, multiple springs are sleeved on the outside of sliding rod, two limiting assemblies are symmetrically installed at the top end of cover plate.

[0007] Preferably, the limiting assembly includes containing block, the bottom end of multiple containing blocks is fixedly connected with the top end of cover plate, and the top end of sliding rod is fixedly connected with limiting disc.

[0008] Preferably, the outer surfaces of the plurality of insert rods are inserted into the inner walls of the four corners of the sealing gasket, and the top of the protective shell contacts the bottom of the cover plate through the sealing gasket.

[0009] Preferably, the bottom ends of the plurality of nuts are in contact with the four corners of the top of the cover plate.

[0010] Preferably, the bottom end of the rubber pad contacts one corner of the top of the PCB board.

[0011] Preferably, the top end of the spring is fixedly connected to the bottom end of the cover plate, and the bottom end of the spring is fixedly connected to the top end of the force-receiving plate.

[0012] Preferably, the outer side of the limiting plate is slidably connected to the inner side of the receiving block, and the inner wall of the bottom end of the receiving block is slidably connected to the outer side of the sliding rod.

[0013] A lithium battery includes multiple lithium batteries, the outer surface of which is inserted into the inner wall of a battery socket, and the top of the multiple lithium batteries is soldered to the bottom of a PCB board.

[0014] Compared with related technologies, the lithium battery protection board assembly and lithium battery provided by this utility model have the following beneficial effects: This invention enables rapid installation of the cover plate through the insertion and connection of the plug rod and the threaded connection of the nut; at the same time, the elastic clamping structure of the sliding rod, spring and rubber pad is used to fix the PCB board simultaneously during the installation of the cover plate, eliminating the cumbersome step of fixing the protective board separately, greatly shortening the assembly time and reducing labor costs, and is especially suitable for mass production scenarios.

[0015] This invention uses a flexible clamping method with springs and rubber pads to replace the rigid squeezing of traditional screws. This effectively avoids deformation and solder joint cracking caused by uneven force during PCB board installation and fixation. At the same time, it protects the electronic components on the board from damage due to rigid fixation. The lithium battery is positioned and plugged in through the battery socket, reducing damage to the tabs or cells caused by collisions and friction during installation, thus improving the overall reliability and service life of the product. Attached Figure Description

[0016] Figure 1 A schematic diagram of the lithium battery protection board assembly and the lithium battery provided by this utility model; Figure 2 for Figure 1 A schematic diagram of the cover plate structure of the base shown; Figure 3 for Figure 1 The diagram shown is a structural disassembly diagram of the protective shell; Figure 4 for Figure 2 Enlarged view of point A in the image.

[0017] The figure label: 1, protective shell; 2, gasket; 3, plug rod; 4, cover plate; 5, nut; 6, battery socket; 7, slot; 8, lithium battery; 9, PCB board; 10, electronic component; 11, heat dissipation hole; 12, sliding rod; 13, force disc; 14, rubber pad; 15, spring; 16, containing block; 17, limiting disc. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples, and it should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0019] The specific implementation of the utility model will be described in detail in combination with specific examples.

[0020] Please refer to Figures 1 to 4 A lithium battery protection plate assembly, comprising: a protective shell 1, the top end of the protective shell 1 is embedded with a gasket 2, the top end of the protective shell 1 is fixedly connected with plug rods 3 at four corners, the outer part of the plurality of plug rods 3 is inserted with the inner wall at four corners of the gasket 2, so as to ensure that the gasket 2 will not be displaced during installation, the outer part of the plurality of plug rods 3 is inserted with a cover plate 4, so as to facilitate quick insertion of the cover plate 4, the top end of the protective shell 1 is in contact with the bottom end of the cover plate 4 through the gasket 2, so as to tightly fill the gap between the protective shell 1 and the cover plate 4 after installation of the cover plate 4, the outer part of the plug rod 3 is threadedly connected with nuts 5, the nuts 5 are standard hexagonal nuts, so as to facilitate tightening operation by using common tools, the bottom end of the plurality of nuts 5 is in contact with the top end of the cover plate 4 at four corners, and the cover plate 4 can be firmly fixed on the protective shell 1 by tightening the nuts 5.

[0021] Battery socket 6, a plurality of battery sockets 6 are formed in the inside of the protective shell 1, the number of the battery sockets 6 can be set according to actual needs, a slot 7 is formed in the top end of the protective shell 1, a PCB board 9 is fitted in the inner wall of the slot 7, the PCB board 9 is provided with precise circuit traces, and is used for realizing protection function of the lithium battery 8, a plurality of electronic components 10 are arranged at the top end of the PCB board 9, the electronic components 10 include protection chips, MOS tubes, sampling resistors and the like, and jointly constitute a lithium battery protection circuit, a plurality of heat dissipation holes 11 are formed in the outer inner wall of the protective shell 1.

[0022] The inner wall of the cover plate 4 is slidably connected with a plurality of sliding rods 12, the bottom end of the sliding rod 12 is fixedly connected with a stress disc 13, the side, away from the sliding rod 12, of the stress disc 13 is fixedly connected with a rubber pad 14, the stress disc 13 can uniformly transmit the acting force of the sliding rod 12 to the rubber pad 14, the bottom end of the rubber pad 14 is in contact with an angle of the top end of the PCB plate 9, the rubber pad 14 has good elasticity and insulation performance, can play a buffering and insulation role when pressing the PCB plate 9, the outside of the sliding rod 12 is sleeved with a plurality of springs 15, the top end of the spring 15 is fixedly connected with the bottom end of the cover plate 4, the bottom end of the spring 15 is fixedly connected with the top end of the stress disc 13, when the cover plate 4 moves downward, the spring 15 is compressed, the rebound force generated can tightly press the PCB plate 9.

[0023] The top end of the cover plate 4 is symmetrically provided with two limiting assemblies, the limiting assembly comprises a containing block 16, the inner wall of the bottom end of the containing block 16 is slidably connected with the outside of the sliding rod 12, the bottom end of the plurality of containing blocks 16 is fixedly connected with the top end of the cover plate 4, the top end of the sliding rod 12 is fixedly connected with a limiting disc 17, the size of the limiting disc 17 is slightly smaller than the internal size of the containing block 16, the outside of the limiting disc 17 is slidably connected with the inside of the containing block 16, through the cooperation of the limiting disc 17 and the containing block 16, the sliding stroke of the sliding rod 12 can be effectively limited, and the sliding rod 12 is prevented from being separated from the cover plate 4.

[0024] Referring to Figure 3 A lithium battery comprises a plurality of lithium batteries 8, the outside of the lithium battery 8 is inserted with the inner wall of the battery insertion hole 6, can play a good fixing role on the lithium battery 8, the top end of the plurality of lithium batteries 8 is welded with the bottom end of the PCB plate 9, can realize the stable electrical connection between the lithium battery 8 and the PCB plate 9, and guarantees the normal work of the protection circuit.

[0025] The working principle of the lithium battery protection plate assembly and the lithium battery is as follows: When the lithium battery protection plate assembly and the lithium battery are assembled, firstly, the installation operation of the lithium battery 8 is carried out, a plurality of lithium batteries 8 are aligned with the battery insertion hole 6 in the protection shell 1, and are inserted one by one, so that the outside of the lithium battery 8 is inserted with the inner wall of the battery insertion hole 6, and meanwhile, the top end of the plurality of lithium batteries 8 is welded with the bottom end of the PCB plate 9, then, the PCB plate 9 is fitted and placed into the insertion slot 7 at the top end of the protection shell 1, at this time, the plurality of electronic elements 10 at the top end of the PCB plate 9 are at the corresponding positions; Subsequently, the installation of the cover plate 4 is carried out, the cover plate 4 is aligned with the insertion rod 3 at the top four corners of the protective shell 1, the outer part of the plurality of insertion rods 3 is inserted into the cover plate 4, and the sealing gasket 2 at the top of the protective shell 1 is in contact with the bottom end of the cover plate 4, then the nuts 5 are screwed on the outer part of the insertion rods 3, and the plurality of nuts 5 are screwed tightly, so that the bottom end of the nuts 5 is in close contact with the top four corners of the cover plate 4, and the installation of the cover plate 4 is completed; During the installation of the cover plate 4, the sliding rod 12 of the inner wall moves downward with the cover plate 4, the sliding rod 12 drives the force receiving disc 13 at the bottom and the rubber pad 14 on one side of the force receiving disc 13 to move downward synchronously, the bottom end of the rubber pad 14 gradually contacts one corner of the top end of the PCB 9, at the same time, the spring 15 outside the sliding rod 12 is extruded, the top end of the spring 15 is connected with the bottom end of the cover plate 4 and the top end of the force receiving disc 13, and the spring 15 is gradually contracted during the extrusion process, and then a rebound force is generated, the rebound force makes the rubber pad 14 tightly press the PCB 9, and the limiting disc 17 at the top end of the sliding rod 12 slides in the inner part of the containing block 16, the bottom end of the containing block 16 is fixedly connected with the top end of the cover plate 4, and the sliding of the limiting disc 17 limits the movement of the sliding rod 12, so that the protective plate is tightly fixed during the installation of the cover plate 4, and the protective plate does not need to be fixed by an additional step.

[0026] The above only describes the embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation according to the content of the present application and the drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A lithium battery protection board assembly, characterized in that, include: The protective shell (1) has a sealing gasket (2) embedded in its top end. The four corners of the top end of the protective shell (1) are fixedly connected with plug rods (3). The plug rods (3) are connected to the outside of a cover plate (4). The plug rods (3) are connected to a nut (5) by a thread. Battery socket (6), multiple battery sockets (6) are provided inside the protective shell (1), a slot (7) is provided at the top of the protective shell (1), a PCB board (9) is fitted to the inner wall of the slot (7), multiple electronic components (10) are provided at the top of the PCB board (9), and multiple heat dissipation holes (11) are provided on the outer inner wall of the protective shell (1). The sliding rod (12) is slidably connected to the inner wall of the cover plate (4). The bottom end of the sliding rod (12) is fixedly connected to the force plate (13). The side of the force plate (13) away from the sliding rod (12) is fixedly connected to the rubber pad (14). The outside of the sliding rod (12) is fitted with multiple springs (15). Limiting components: Two limiting components are symmetrically installed on the top of the cover plate (4).

2. The lithium battery protection board assembly according to claim 1, characterized in that, The limiting component includes receiving blocks (16), the bottom ends of multiple receiving blocks (16) are fixedly connected to the top end of the cover plate (4), and the top end of the sliding rod (12) is fixedly connected to a limiting disk (17).

3. The lithium battery protection board assembly according to claim 1, characterized in that, The outer sides of the multiple insertion rods (3) are inserted into the inner walls of the four corners of the sealing gasket (2), and the top of the protective shell (1) contacts the bottom of the cover plate (4) through the sealing gasket (2).

4. The lithium battery protection board assembly according to claim 1, characterized in that, The bottom ends of the plurality of nuts (5) are in contact with the top four corners of the cover plate (4).

5. The lithium battery protection board assembly according to claim 1, characterized in that, The bottom end of the rubber pad (14) contacts the top corner of the PCB board (9).

6. The lithium battery protection board assembly according to claim 1, characterized in that, The top end of the spring (15) is fixedly connected to the bottom end of the cover plate (4), and the bottom end of the spring (15) is fixedly connected to the top end of the force plate (13).

7. The lithium battery protection board assembly according to claim 2, characterized in that, The outer side of the limiting plate (17) is slidably connected to the inner side of the receiving block (16), and the inner wall of the bottom end of the receiving block (16) is slidably connected to the outer side of the sliding rod (12).

8. A lithium battery, characterized in that, include: Multiple lithium batteries (8) are a lithium battery protection board assembly as described in any one of claims 1-7, wherein the outer surface of the lithium battery (8) is inserted into the inner wall of the battery socket (6), and the top end of the multiple lithium batteries (8) is soldered to the bottom end of the PCB board (9).

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