A lithium battery end cap assembly with power display function

Abstract

This utility model discloses a lithium battery end cap assembly with a power display function, relating to the field of lithium battery packaging technology. This utility model features a rotatable first and second housing on the end cap body, with the first and second housings rotatably mounted on the end cap body. The protective housing that forms a shield around the display is composed of the first and second housings on both sides of the display, thus preventing the protective structure from affecting the installation and wiring of the display. Simultaneously, the elastic connection between the first and second housings effectively buffers the impact on the battery assembly, preventing collisions between the battery assembly and the display during bumps, thus providing effective protection for the display.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery packaging technology, and in particular to a lithium battery end cap assembly with a power display function. Background Technology

[0002] In existing lithium batteries used in electric bicycles, the internal cells are usually integrated with the BMS (Battery Management System) on the battery pack. The BMS is the core control unit of the battery pack, responsible for monitoring and managing various parameters of the battery. By connecting the BMS system to a display, the power information can be transmitted to the display to show the power status.

[0003] However, as electric vehicles demand increasingly higher range, the size of the existing lithium battery end caps is typically fixed due to compatibility limitations. This results in a higher space occupancy rate of the battery assembly within the casing after packaging, leading to a smaller gap between the battery assembly and the end cap assembly. Furthermore, a buffer spring is usually installed between the bottom of the battery assembly and the bottom wall of the casing to mitigate impacts during bumps, allowing for vertical displacement. Current lithium battery casings lack protection for the portion of the display embedded within them. Excessive vibrations can cause the battery assembly to collide directly with the bottom wall of the display, potentially leading to detachment or damage. Conversely, a fixed protective casing for the display would complicate installation and wiring. Utility Model Content

[0004] The main purpose of this invention is to propose a lithium battery end cap assembly with a power display function, which aims to solve the technical problem that the battery assembly is prone to collision with the display when encountering excessive vibration in the existing lithium battery packaging structure.

[0005] To achieve the above objectives, this utility model proposes a lithium battery end cap assembly with a power display function, comprising: an end cap body, which is installed on the top of the battery assembly, and a display and a control component are mounted on the end cap body; a protective shell, which includes a first shell and a second shell, wherein the first shell is rotatably installed on the side of the end cap body near the battery assembly, and the first shell is installed on both sides opposite the display; the second shell is slidably disposed on the side of the first shell away from the display, and the second shell and the first shell are connected by an elastic element; and the control component is used to drive the first shell to rotate, so that the first shell drives the second shell to cover the bottom of the display.

[0006] Optionally, the elastic element is a first buffer spring disposed between the first housing and the second housing, and the first buffer spring is sleeved on the connecting shaft and the bushing; one end of the connecting shaft is fixedly connected to the first housing, and the other end is slidably sleeved in the bushing, and the end of the bushing away from the first housing is fixedly connected to the second housing.

[0007] Optionally, the first housing has a first mounting block at each end along its length, with the first mounting block located on the side of the first housing closer to the display. The control assembly includes a drive element and a rotating shaft that are connected by a drive mechanism. The drive element is located on the outer wall of the end cover body, and the rotating shaft is rotatably mounted on the top wall of the inner cavity of the end cover body. The first mounting block is connected by a drive mechanism to the rotating shaft, and a torsion spring is sleeved on the rotating shaft. One end of the torsion spring is mounted on the end cover body, and the other end is mounted on the first housing. When the drive element is not working, the torsion spring is used to drive the second housing to spring back to abut against the top wall of the inner cavity of the end cover body.

[0008] Optionally, the first mounting block includes a limiting surface perpendicular to the top wall of the inner cavity of the end cover body. When the second housing blocks the bottom of the display, the limiting surface abuts against the top wall of the inner cavity of the end cover body, thereby restricting the first housing from continuing to rotate.

[0009] Optionally, a cable routing groove is provided on the side wall of the second housing. When the second housing blocks the bottom of the display, the second housings on both sides of the display abut against each other, and the two cable routing grooves form cable routing holes for the display lines to pass through.

[0010] Optionally, a guide block is provided at one end of the rotating shaft. The guide block is connected to the driving element via a pull rope. The driving element drives the first housing to rotate by pulling the pull rope. A through hole is provided on the top wall of the end cover body for the pull rope to pass through.

[0011] Optionally, one end of the guide block is fixedly connected to the rotating shaft, and the other end is provided with a first binding hole for binding a pull rope; the two ends of the guide block are set at an angle, and when the torsion spring drives the second housing to abut against the inner cavity top wall of the end cover body, the end of the guide block with the first binding hole has an acute angle with the end cover body.

[0012] Optionally, the driving element includes a fixed plate, an operating plate, and a guide pin. The fixed plate is fixedly installed on the outer top wall of the end cover body, and one end of the operating plate is hinged to the other end of the operating plate. A snap-fit ​​shaft is provided at the other end of the fixed plate, and the middle part of the operating plate is snapped onto the snap-fit ​​shaft. A second binding hole for binding the pull rope is provided at the other end of the operating plate. The guide pin is provided on one side of the fixed plate, and the hinge point between the fixed plate and the operating plate is located between the snap-fit ​​shaft and the guide pin. A guide wheel for guiding the pull rope is rotatably provided on the guide pin.

[0013] Optionally, the drive element also includes a first support arm and a second support arm, which are sleeved together by a second buffer spring. One end of the first support arm is connected to the snap-fit ​​shaft, and the other end has a larger outer dimension than the aperture of the second buffer spring and is located at the end of the second buffer spring away from the snap-fit ​​shaft. One end of the second support arm is connected to the guide pin shaft, and the other end has a larger outer dimension than the aperture of the second buffer spring and is located at the end of the second buffer spring away from the guide pin shaft. The first and second support arms can change the position of the guide pin shaft by compressing the second buffer spring.

[0014] This utility model discloses a lithium battery end cap assembly with a power display function. It comprises a rotatable first housing and a second housing on the end cap body. Before the display is installed, the first and second housings are mounted on the end cap body without interfering with the display. After the display is installed, a drive component rotates the first housing, causing the first housings on both sides of the display to rotate towards the second housing, ultimately shielding the bottom wall of the display and forming a protective barrier between the display and the battery assembly. During use, when encountering bumps, the battery assembly first contacts the second housing. Because the second and first housings are elastically connected, the elastic element between them effectively cushions the impact on the battery assembly, thus protecting the display. The first and second housings are rotatably mounted on the end cap body, and the protective shell for the display is composed of the first and second housings on both sides of the display. This prevents the display's protective structure from affecting its installation and wiring. Simultaneously, the elastic connection between the first and second housings effectively cushions the impact on the battery assembly, preventing collisions between the battery assembly and the display during bumps, thus providing effective protection for the display. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a lithium battery;

[0017] Figure 2 This is a top view of a lithium battery.

[0018] Figure 3 This is a front view diagram of a lithium battery;

[0019] Figure 4 for Figure 2 Schematic diagram of the cross section of AA;

[0020] Figure 5 for Figure 3 Cross-sectional view of BB;

[0021] Figure 6 for Figure 4 Enlarged schematic diagram of region D in the middle;

[0022] Figure 7 and Figure 8 This is a three-dimensional structural diagram of the end cap body, with the drive component in a non-working state;

[0023] Figure 9 for Figure 8 Enlarged view of region C in the middle;

[0024] Figure 10 This is a schematic diagram of the installation structure of the first and second housings;

[0025] Figures 11-13 This is a schematic diagram of the drive element.

[0026] Figure 14 This is a schematic diagram of the battery assembly.

[0027] Explanation of icon numbers:

[0028] 1. Battery assembly; 11. BMS wiring notch; 2. End cap body; 21. Handle; 22. Charging port; 23. Power output connector; 24. Through hole; 3. Display; 4. Drive assembly; 41. Rotary shaft mounting base; 42. Rotary shaft; 43. Guide block; 44. Pull cord; 45. Drive element; 451. Fixing plate; 451a. Snap-fit ​​shaft; 452. Operation panel; 452a. Second binding hole; 453. First support arm; 454. Second support arm; 455. Second buffer spring; 456. Guide pin; 457. Guide wheel; 5. Protective housing; 51. First housing; 511. First mounting block; 512. Second mounting block; 513. First mounting hole; 52. Second housing; 521. Wire groove; 53. Connecting shaft; 54. Bushing; 55. First buffer spring.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, provided that they are feasible for those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] This utility model proposes a lithium battery end cap assembly with a power display function.

[0034] In this embodiment, as Figures 1-8 The lithium battery end cap assembly shown includes an end cap body 2 and a protective housing 5. The end cap body 2 is mounted on the top of the battery assembly 1, and a display 3 and a control component are mounted on the end cap body 2. The protective housing 5 includes a first housing 51 and a second housing 52. The first housing 51 is rotatably mounted on the side of the end cap body 2 near the battery assembly 1. The first housing 51 is mounted on both sides opposite the display 3. The second housing 52 is slidably disposed on the side of the first housing 51 away from the display 3. An elastic element is provided between the second housing 52 and the first housing 51. The control component is used to drive the first housing 51 to rotate so that the first housing 51 drives the second housing 52 to cover the bottom of the display 3.

[0035] Specifically, by setting a rotatable first housing 51 and a second housing 52 on the end cover body 2, before the display 3 is installed, the first housing 51 and the second housing 52 are set on the end cover body 2 without interfering with the display 3. After the display 3 is installed, the first housing 51 is driven to rotate by the drive component 4, so that the first housing 51 on both sides of the display 3 drives the second housing 52 to rotate towards the display 3, and finally the second housing 52 blocks the bottom wall of the display 3, thus forming protection between the display 3 and the battery assembly 1. In use, when encountering bumps, the battery assembly 1 first comes into contact with the second housing 52, and since the second housing 52 and the first housing 51 are elastically connected, the elastic element between the first housing 51 and the second housing 52 can effectively buffer the impact on the battery assembly 1, thereby protecting the display 3. The first housing 51 and the second housing 52 of this utility model are rotatably mounted on the end cover body 2. The protective housing 5 that protects the outside of the display 3 is composed of the first housing 51 and the second housing 52 on both sides of the display 3. This can prevent the protective structure of the display 3 from affecting the installation and wiring of the display 3. At the same time, the elastic connection of the first housing 51 and the second housing 52 can effectively buffer the impact of the battery assembly 1, prevent the battery assembly 1 from colliding with the display 3 during bumps, and provide effective protection for the display 3.

[0036] Optionally, a first buffer spring 55 is provided between the first housing 51 and the second housing 52. The first buffer spring 55 is sleeved on the connecting shaft 53 and the bushing 54. One end of the connecting shaft 53 is fixedly connected to the first housing 51, and the other end is slidably sleeved in the bushing 54. The end of the bushing 54 away from the first housing 51 is fixedly connected to the second housing 52.

[0037] Specifically, one end of the connecting shaft 53 is fixedly connected to the first housing 51 by welding, bolting, or other mechanical connection methods, while the other end is inserted into the bushing 54 and can slide along the inner wall of the bushing 54, thereby guiding the second housing 52 in the direction of movement of the first housing 51, allowing the second housing 52 to move axially along the connecting shaft 53 and the bushing 54. The end of the bushing 54 away from the first housing 51 is fixedly connected to the second housing 52 by welding or threaded connection. In use, the first buffer spring 55 surrounds the outside of the connecting shaft 53 and the bushing 54, with a portion of the connecting shaft 53 inserted into the bushing 54. The first buffer spring 55 buffers the relative movement between the second housing 52 and the first housing 51 through its own elastic deformation.

[0038] More specifically, when the connecting shaft 53 and the bushing 54 are in rigid contact, that is, when the end wall of the connecting shaft 53 abuts against the end wall of the inner cavity of the bushing 54, there is still a gap between the second housing 52 and the bottom wall of the display 3. This means that after the second housing 52 is impacted by the battery assembly 1, even if the second housing 52 is displaced to its extreme position, the second housing 52 can still transmit the impact force to the end cover body 2 through the first housing 51. This makes the protective housing 5 form a rigid protection on the outside of the display 3, which can effectively protect the display 3 and prevent the display 3 from being directly impacted.

[0039] Optional, such as Figures 1-10 As shown, the first housing 51 has a first mounting block 511 at both ends along its length, and the first mounting block 511 is located on the side of the first housing 51 closer to the display 3; the control component includes a drive element 45 and a rotating shaft 42 connected by transmission. The drive element 45 is disposed on the outer wall of the end cover body 2, and the rotating shaft 42 is rotatably mounted on the top wall of the inner cavity of the end cover body 2; the first mounting block 511 has a first mounting hole 513, the rotating shaft 42 passes through the first mounting hole 513, and a torsion spring is sleeved on the rotating shaft 42. One end of the torsion spring is mounted on the end cover body 2, and the other end is mounted on the first housing 51; when the drive element 45 is not working, the torsion spring is used to drive the second housing 52 to spring back to abut against the top wall of the inner cavity of the end cover body 2.

[0040] Specifically, the end cap body 2 has a mounting hole for the display 3, which allows the display 3 to pass through. A pivot 42 mounting seat 41 is provided on the top wall of the inner cavity of the end cap body 2. The pivot 42 mounting seats 41 for mounting the same pivot 42 are located on both sides of the display 3 along its length, and a first housing 51 is provided on both sides of the display 3 along its width. The rotating shaft 42 is rotatably mounted in the rotating shaft 42 mounting base 41. A torsion spring is fitted on the rotating shaft 42, and the rotating shaft 42 is fixedly connected to the first mounting block 511, so that the rotating shaft 42 can drive the first housing 51 to rotate. The two ends of the torsion spring that generate torque are respectively mounted on the first housing 51 and the rotating shaft 42 mounting base 41, so that when the rotating shaft 42 drives the first housing 51 to rotate, the torsion spring between the first housing 51 and the first rotating shaft 42 mounting base 41 is coiled and accumulates elastic force. When the driving element 45 is not working, the elastic force of the torsion spring makes the first housing 51 fit against the top wall of the end cover body 2. That is, when the display 3 is not installed, the first housings 51 located on both sides of the mounting hole of the display 3 are in a state of being far away from each other and close to the top wall of the end cover body 2, which will not block the mounting hole of the display 3 and will not interfere with the installation of the display 3.

[0041] Optionally, the first mounting block 511 includes a limiting surface perpendicular to the top wall of the inner cavity of the end cover body 2. When the second housing 52 blocks the bottom of the display 3, the limiting surface abuts against the top wall of the inner cavity of the end cover body 2, thereby restricting the first housing 51 from continuing to rotate.

[0042] Specifically, the second housing 52 is L-shaped, and the limiting surface is used to restrict the rotation angle of the first housing 51. That is, the first housing 51 can only rotate from a state of being in contact with the end cover body 2 to a state of being perpendicular to the top wall of the end cover body 2. When the first housing 51 is perpendicular to the top wall of the end cover body 2, one end of the second housing 52 is parallel to the side wall of the display 3, and the other end is parallel to the bottom wall of the display 3.

[0043] In other embodiments, the second housing 52 may also have sidewalls on both sides along the length of the display 3 housing.

[0044] Optionally, a wire-passing groove 521 is provided on the side wall of the second housing 52. When the second housing 52 blocks the bottom of the display 3, the second housings 52 on both sides of the display 3 abut against each other, and the two wire-passing grooves 521 form wire-passing holes for the display 3 to pass through.

[0045] In this embodiment, as Figure 14 As shown, a BMS wiring notch 11 is provided on one side of the top surface of the battery assembly 1. The display 3 is provided with a line that connects to the BMS of the battery assembly 1. The wire through grooves 521 on the two second housings 52 together form the wire through hole of the protective housing 5. The wire through hole is used for the line of the display 3 to pass through, thereby connecting to the BMS of the battery assembly 1.

[0046] Preferably, the wiring of the display 3 is located on the side wall, and the wire groove 521 is opened on the side walls on both sides of the display 3 when the second housing 52 forms the protective housing 5, so as to prevent the wiring of the display 3 from passing through the gap between the display 3 and the battery assembly 1, thereby preventing the battery assembly 1 from touching the wiring when it comes into contact with the second housing 52.

[0047] Optionally, a guide block 43 is provided at one end of the rotating shaft 42. The guide block 43 is connected to the driving element 45 through a pull rope 44. The driving element 45 drives the first housing 51 to rotate by pulling the pull rope 44. A through hole 24 is provided on the top wall of the end cover body 2 for the pull rope 44 to pass through.

[0048] Specifically, the through hole 24 is located on one side of the display 3 and is located in the center of the width direction of the display 3; the guide blocks 43 on both sides of the display 3 are arranged in a mirror symmetrical manner, and the two guide blocks 43 are respectively connected to the drive element 45 through different pull ropes 44.

[0049] Optionally, one end of the guide block 43 is fixedly connected to the rotating shaft 42, and the other end is provided with a first binding hole for binding the pull rope 44; the two ends of the guide block 43 are set at an angle, and when the torsion spring drives the second housing 52 to abut against the inner cavity top wall of the end cover body 2, the end of the guide block 43 with the first binding hole has an acute angle with the end cover body 2.

[0050] Specifically, the guide block 43 is set at an acute angle with the end cap body 2 so that when the rotating shaft 42 drives the first housing 51 to fit against the top wall of the end cap body 2, the end where the first binding hole is located tilts upward, which helps the drive element 45 to pull the guide block 43 to the east through the pull rope 44.

[0051] Optional, such as Figures 10-13 As shown, the driving element 45 includes a fixed plate 451, an operating plate 452, and a guide pin 456. The fixed plate 451 is fixedly installed on the outer top wall of the end cover body 2. One end of the operating plate 452 is hinged to the other end of the fixed plate 451. A snap-fit ​​shaft 451a is provided at the other end of the fixed plate 451. The middle part of the operating plate 452 is snapped onto the snap-fit ​​shaft 451a. A second binding hole 452a for binding the pull rope 44 is provided at the other end of the operating plate 452. The guide pin 456 is provided on one side of the fixed plate 451. The hinge point between the fixed plate 451 and the operating plate 452 is located between the snap-fit ​​shaft 451a and the guide pin 456. A guide wheel 457 for guiding the pull rope 44 is rotatably provided on the guide pin 456.

[0052] Specifically, one end of the pull rope 44 is connected to the first binding hole, and the other end passes through the guide wheel 457 and is connected to the ground binding hole.

[0053] More specifically, the guide wheel 457 is positioned near the through hole 24, and the guide wheel 457 partially blocks the through hole 24, so that the pull rope 44 passing through the through hole 24 does not contact the edge of the through hole 24, but directly contacts the edge of the through hole 24 via the arc surface of the guide wheel 457, thus replacing the point contact between the pull rope 44 and the edge of the through hole 24. This prevents stress concentration on the pull rope 44 at the edge of the through hole 24 during use and helps to protect the pull rope 44.

[0054] In other embodiments, the edges of the through hole 24 can also be rounded to avoid excessive stress concentration.

[0055] Optionally, the drive element 45 further includes a first support arm 453 and a second support arm 454, which are sleeved together by a second buffer spring 455. One end of the first support arm 453 is connected to the snap-fit ​​shaft 451a, and the outer dimensions of the other end are larger than the aperture of the second buffer spring 455, and it is located at the end of the second buffer spring 455 away from the snap-fit ​​shaft 451a. One end of the second support arm 454 is connected to the guide pin 456, and the outer dimensions of the other end are larger than the aperture of the second buffer spring 455, and it is located at the end of the second buffer spring 455 away from the guide pin 456. The first support arm 453 and the second support arm 454 can change the position of the guide pin 456 by compressing the second buffer spring 455.

[0056] Specifically, the second buffer spring 455 between the first support arm 453 and the second support arm 454 allows the distance between them to be adjusted, thereby adjusting the position of the guide pin 456. After the pull rope 44 passes over the guide wheel 457, and the operating plate 452 is engaged with the locking shaft 451a, the second buffer spring 455 drives the first support arm 453 and the second support arm 454 to move away from each other, thus tightening the pull rope 44 and providing continuous tension to the first housing 51, ensuring that the second housing 52 always blocks the bottom wall of the display 3 during use.

[0057] In this embodiment, the end cap body 2 is also provided with a handle 21, a charging port 22, and a power output connector 23. The handle 21 is used to facilitate lifting the entire package housing; the charging port 22 is located directly above the BMS wiring notch 11, and the line of the charging port 22 passes through the BMS wiring notch 11 and connects to the BMS inside the battery assembly 1; the charging port 22 is located on the top wall of the end cap body 2 on the side away from the display 3, and the power output connector 23 is located between the charging port 22 and the display 3.

[0058] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A lithium battery end cap assembly with power display function, characterized in that, include: End cap body (2), the end cap body (2) is mounted on the top of the battery assembly (1), and the end cap body (2) is equipped with a display (3) and a control component (4). The protective housing (5) includes a first housing (51) and a second housing (52). The first housing (51) is rotatably mounted on the side of the end cap body (2) near the battery assembly (1). The first housing (51) is mounted on both opposite sides of the display (3). The second housing (52) is slidably disposed on the side of the first housing (51) away from the display (3). The second housing (52) is connected to the first housing (51) by an elastic element. The control component (4) is used to drive the first housing (51) to rotate so that the first housing (51) drives the second housing (52) to cover the bottom of the display (3).

2. The lithium battery end cap assembly with charge display function according to claim 1, wherein, The elastic element is a first buffer spring (55) disposed between the first housing (51) and the second housing (52), and the first buffer spring (55) is sleeved on the connecting shaft (53) and the bushing (54); One end of the connecting shaft (53) is fixedly connected to the first housing (51), and the other end is slidably sleeved in the bushing (54). The end of the bushing (54) away from the first housing (51) is fixedly connected to the second housing (52).

3. The lithium battery end cap assembly with charge display function according to claim 2, wherein, The first housing (51) is provided with a first mounting block (511) at both ends along the length direction. The first mounting block (511) is located on the side of the first housing (51) closer to the display (3). The control component (4) includes a drive element (45) and a rotating shaft (42) that are connected by transmission. The drive element (45) is disposed on the outer wall of the end cap body (2), and the rotating shaft (42) is rotatably mounted on the top wall of the inner cavity of the end cap body (2). The first mounting block (511) is connected to the rotating shaft (42) in a transmission connection, and a torsion spring (46) is sleeved on the rotating shaft (42). One end of the torsion spring (46) is mounted on the end cover body (2), and the other end is mounted on the first housing (51). When the drive element (45) is not working, the torsion spring (46) is used to drive the second housing (52) to spring back to abut against the inner cavity top wall of the end cap body (2).

4. The lithium battery end cap assembly with charge display function according to claim 3, wherein, The first mounting block (511) includes a limiting surface perpendicular to the top wall of the inner cavity of the end cap body (2). When the second housing (52) blocks the bottom of the display (3), the limiting surface abuts against the top wall of the inner cavity of the end cap body (2), thereby restricting the first housing (51) from continuing to rotate.

5. The lithium battery end cap assembly with charge display function according to claim 4, wherein, The second housing (52) has a wire groove (521) on its side wall. When the second housing (52) blocks the bottom of the display (3), the second housing (52) on both sides of the display (3) abuts, and the two wire grooves (521) form a wire hole for the display (3) to pass through.

6. The lithium battery end cap assembly with charge display function according to claim 3, wherein, One end of the rotating shaft (42) is provided with a guide block (43), the guide block (43) is connected to the driving element (45) through a pull rope (44), and the driving element (45) drives the first housing (51) to rotate by pulling the pull rope (44); The top wall of the end cap body (2) is provided with a through hole (24) for the pull rope (44) to pass through.

7. The lithium battery end cap assembly with charge display function according to claim 6, wherein, One end of the guide block (43) is fixedly connected to the rotating shaft (42), and the other end is provided with a first binding hole, which is used to bind the pull rope (44). The two ends of the guide block (43) are set at an angle. When the torsion spring (46) drives the second housing (52) to abut against the inner cavity top wall of the end cap body (2), the end of the guide block (43) with the first binding hole has an acute angle with the end cap body (2).

8. The lithium battery end cap assembly with charge display function according to claim 7, wherein, The driving element (45) includes a fixed plate (451), an operating plate (452), and a guide pin (456). The fixing plate (451) is fixedly installed on the outer top wall of the end cap body (2), and one end of the operating plate (452) is hinged to the other end of the operating plate (452). The other end of the fixing plate (451) is provided with a snap-fit ​​shaft (451a), the middle part of the operating plate (452) is snapped onto the snap-fit ​​shaft (451a), and the other end of the operating plate (452) is provided with a second binding hole (452a) for binding the pull rope (44). The guide pin (456) is disposed on one side of the fixed plate (451), and the hinge between the fixed plate (451) and the operating plate (452) is located between the snap-fit ​​shaft (451a) and the guide pin (456). The guide pin (456) is rotatably provided with a guide wheel (457) for guiding the pull rope (44).

9. The lithium battery end cap assembly with charge display function according to claim 8, wherein, The drive element (45) further includes a first support arm (453) and a second support arm (454), which are sleeved together by a second buffer spring (455); One end of the first support arm (453) is connected to the snap-fit ​​shaft (451a), and the outer dimensions of the other end are larger than the aperture of the second buffer spring (455), and it is located at the end of the second buffer spring (455) away from the snap-fit ​​shaft (451a). One end of the second support arm (454) is connected to the guide pin (456), and the outer dimensions of the other end are larger than the aperture of the second buffer spring (455), and it is located at the end of the second buffer spring (455) away from the guide pin (456); The first support arm (453) and the second support arm (454) can change the position of the guide pin (456) by compressing the second buffer spring (455).

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