Lithium ion battery health state on-line measuring device

Abstract

The invention discloses a lithium ion battery health state on-line measuring device, and belongs to the technical field of battery health state measuring devices.The lithium ion battery health state on-line measuring device comprises a protection box, moving wheels are installed at the four corners of the bottom of the protection box, a power supply is fixedly installed on the left side of the protection box, and a power supply port is formed in the front end face of the power supply; the right side of the protection box is fixedly connected with a handrail, and the lower end of the protection box is provided with a fixing plate below the power supply and the handrail. Through the result design of the protective cover, the handle, the handrail, the moving wheels, the protective box, the placement cavity, the lithium ion battery health state online measurement equipment body, the sponge block, the limiting frame and the first spring, the lithium ion battery health state online measurement equipment body can be conveniently carried; and meanwhile, the lithium ion battery health state on-line measurement equipment body can be protected, and damage caused by collision between the lithium ion battery health state on-line measurement equipment body and the inner wall of the placement cavity in the moving process is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of battery state-of-health measurement devices, and particularly to an on-line measurement device for the state-of-health of lithium-ion batteries. Background Art

[0002] With the rapid development of the domestic lithium-ion battery industry, lithium-ion batteries have begun to be widely used in new energy vehicles, new energy energy storage and other fields. The inherent characteristics and application environment of lithium-ion batteries determine that their capacity will continuously decay and their internal resistance will continuously increase during use. The state-of-health (SOH) of lithium-ion batteries will continuously decrease. The decrease in SOH will also lead to a continuous decline in the electrical and safety performance of lithium-ion batteries, and serious cases may cause safety accidents. To avoid safety problems during the application of lithium-ion batteries and facilitate the cascade utilization of lithium-ion batteries, it is necessary to measure the SOH of lithium-ion batteries and perform corresponding processing according to the SOH value in accordance with relevant regulations.

[0003] This application is an improvement over the prior art. In the prior art, the existing discharge experiment method is to discharge the lithium-ion battery with equipment until the battery voltage reaches the discharge cut-off voltage, measure the discharge capacity of the lithium-ion battery, and calculate the ratio of it to the rated capacity of the lithium-ion battery, which is the current SOH. However, most of the existing on-line measurement devices for the state-of-health of lithium-ion batteries are fixed installation mechanisms with relatively fixed positions, which are not convenient to carry and are difficult to detect the state-of-health of lithium-ion batteries well, resulting in poor convenience.

[0004] The above information disclosed in this background art is only used to increase the understanding of the background art of this application, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide an on-line measurement device for the state-of-health of lithium-ion batteries to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: An on-line measurement device for the state of health of a lithium-ion battery, including a protective box. At the four corners of the bottom of the protective box, moving wheels are installed. On the left side of the protective box, a power supply is fixedly installed. On the front surface of the power supply, a power supply port is provided. On the right side of the protective box, a handrail is fixedly connected. Below the power supply and the handrail at the lower end of the protective box, a fixing plate is provided. A limiting screw is threadedly arranged through the surface of the fixing plate. At the bottom of the limiting screw, an anti-slip pad is fixedly connected. On the top of the protective box, a protective cover is rotatably arranged. On the top of the protective cover, a handle is fixedly connected. Inside the protective box, a placement cavity is provided. At the bottom end of the placement cavity, a sponge block is fixedly connected. On both sides of the inner wall of the placement cavity, first springs are fixedly connected. On one side where the two first springs are close to each other, a limiting frame is fixedly connected. Between the two limiting frames, an on-line measurement device body for the state of health of a lithium-ion battery is movably installed. On the outer wall of the on-line measurement device body for the state of health of a lithium-ion battery, a movable door is rotatably arranged. On the top of the movable door, a display screen is provided. On one side of the display screen, an operation panel is provided. Inside the on-line measurement device body for the state of health of a lithium-ion battery, a detection cavity is provided.

[0007] As a further solution of the present invention: At both ends inside the detection cavity, sleeves are fixedly connected. Inside the sleeves, second springs are provided.

[0008] As a further solution of the present invention: At one end where the two second springs are close to each other, movable plates are fixedly connected. At one end where the two movable plates are close to each other, limiting rods are fixedly connected. At one end where the two limiting rods are close to each other, a clamping frame is fixedly connected.

[0009] As a further solution of the present invention: Above the detection cavity, a positive and negative motor is installed. At the output end of the positive and negative motor, a second gear disc is fixedly sleeved.

[0010] As a further solution of the present invention: At the top of the second gear disc, a first gear disc is meshed and connected. Inside the first gear disc, a rotating rod is fixedly connected.

[0011] As a further solution of the present invention: On the outer walls on both sides of the rotating rod, first conical discs are fixedly sleeved. At the bottom of the first conical disc, a second conical disc is meshed and connected. Inside the second conical disc, a transmission rod is fixedly connected.

[0012] As a further solution of the present invention: At the bottom of the transmission rod, a bidirectional screw is fixedly connected. On the outer wall of the bidirectional screw, a moving block is threadedly connected. On the surface of the moving block, a vertical rod is movably arranged through.

[0013] As a further solution of the present invention: on one side of each of the two moving blocks close to each other, a second hinge block is fixedly connected. On one side of each of the two second hinge blocks close to each other, a hinge rod is hinged. On one side of each of the two hinge rods close to each other, a first hinge block is hinged.

[0014] As a further solution of the present invention: on one side of each of the two first hinge blocks close to each other, a transmission plate is fixedly connected. On one side of each of the two transmission plates close to each other, a mounting block is fixedly connected. On one side of each of the two mounting blocks close to each other, a charge-discharge detection board is fixedly connected.

[0015] The present invention has the following beneficial effects:

[0016] (1) Through the structural design of the protective cover, handle, armrest, moving wheel, protective box, placement cavity, lithium-ion battery health state on-line measuring device body, sponge block, limiting frame and first spring, it can be realized that it is convenient to carry the lithium-ion battery health state on-line measuring device body, and at the same time, it can protect the lithium-ion battery health state on-line measuring device body, avoiding damage caused by collision between the lithium-ion battery health state on-line measuring device body and the inner wall of the placement cavity during the moving process. It solves the problem that most of the existing lithium-ion battery health state on-line measuring devices are fixed installation mechanisms, with relatively fixed positions, inconvenient to carry, difficult to detect the health state of lithium-ion batteries well, and poor in convenience;

[0017] (2) Through the structural design of the movable door, display screen, operation panel, first conical disk, second conical disk, transmission rod, vertical rod, moving block, bidirectional screw, transmission plate, charge-discharge detection board, mounting block, first hinge block, hinge rod, second hinge block, first gear disk, rotating rod, second gear disk and positive and reverse motor, it can be realized that it is convenient to detect the health state of the lithium-ion battery, with simple operation and high detection effect.

[0018] (3) Through the structural design of the movable door, sleeve, second spring, movable plate, limiting rod and clamping frame, it can be realized that it is convenient to effectively clamp and fix the lithium-ion battery, thus facilitating the subsequent detection work on the lithium-ion battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional partial schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a partial bottom view structural schematic diagram of the present invention;

[0021] Figure 3 It is a partial top view structural schematic diagram of the present invention;

[0022] Figure 4Schematic diagram of the partial internal structure of the protective box of the present invention;

[0023] Figure 5 Schematic diagram of the partial external structure of the main body of the online measurement device for the health state of lithium-ion batteries of the present invention;

[0024] Figure 6 Schematic diagram of the partial internal structure of the main body of the online measurement device for the health state of lithium-ion batteries of the present invention;

[0025] Figure 7 Schematic diagram of the enlarged partial structure at location A of the present invention;

[0026] Figure 8 Schematic diagram of the enlarged partial structure at location B of the present invention;

[0027] Figure 9 Schematic diagram of the enlarged partial structure at location C of the present invention;

[0028] Figure 10 Schematic diagram of the partial structure mainly showing the clamping frame of the present invention.

[0029] In the figure: 1. protective cover; 2. power supply; 3. power supply port; 4. handle; 5. handrail; 6. moving wheel; 7. fixing plate; 8. limiting screw; 9. anti-slip pad; 10. protective box; 11. placement cavity; 12. main body of the online measurement device for the health state of lithium-ion batteries; 13. sponge block; 14. limiting frame; 15. first spring; 16. movable door; 17. display screen; 18. operation panel; 19. detection cavity; 20. first conical disk; 21. second conical disk; 22. transmission rod; 23. vertical rod; 24. moving block; 25. bidirectional screw; 26. transmission plate; 27. charge and discharge detection board; 28. mounting block; 29. first hinge block; 30. hinge rod; 31. second hinge block; 32. first gear disk; 33. rotating rod; 34. second gear disk; 35. positive and negative motor; 36. sleeve; 37. second spring; 38. movable plate; 39. limiting rod; 40. clamping frame. Detailed implementation manners

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention.

[0031] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] It should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0033] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not mean that the component is required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0034] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Please refer to Figure 1-10, an embodiment provided by the present invention: an on-line measurement device for the state of health of a lithium-ion battery, comprising a protective box 10, moving wheels 6 are installed at the four corners of the bottom of the protective box 10, a power supply 2 is fixedly installed on the left side of the protective box 10, a power supply port 3 is arranged on the front surface of the power supply 2, a handrail 5 is fixedly connected to the right side of the protective box 10, a fixing plate 7 is arranged below the power supply 2 and the handrail 5 at the lower end of the protective box 10, a limiting screw 8 is threadedly arranged through the surface of the fixing plate 7, an anti-slip pad 9 is fixedly connected to the bottom of the limiting screw 8, a protective cover 1 is rotatably arranged on the top of the protective box 10, a handle 4 is fixedly connected to the top of the protective cover 1, a placement cavity 11 is arranged inside the protective box 10, a sponge block 13 is fixedly connected to the inner bottom end of the placement cavity 11, first springs 15 are fixedly connected to both sides of the inner wall of the placement cavity 11, limiting frames 14 are fixedly connected to one side of the two first springs 15 close to each other, an on-line measurement device body 12 for the state of health of a lithium-ion battery is movably installed between the two limiting frames 14, a movable door 16 is rotatably arranged on the outer wall of the on-line measurement device body 12 for the state of health of a lithium-ion battery, a display screen 17 is arranged on the top of the movable door 16, an operation panel 18 is arranged on one side of the display screen 17, and a detection cavity 19 is arranged inside the on-line measurement device body 12 for the state of health of a lithium-ion battery;

[0036] Specifically, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown in the figure, when in use, the online measurement device body 12 for the health state of the lithium-ion battery can be placed in the protective box 10, and then cooperate with the moving wheels 6 at the bottom of the protective box 10, so as to achieve the purpose of facilitating the carrying of the online measurement device body 12 for the health state of the lithium-ion battery. At the same time, before the online measurement device body 12 for the health state of the lithium-ion battery is placed in the protective box 10, it is necessary to first move the two limiting frames 14 in the direction away from each other. When the two limiting frames 14 move to appropriate positions, the online measurement device body 12 for the health state of the lithium-ion battery is placed between the two limiting frames 14, and then the limiting frames 14 are released. At this time, the elasticity of the first spring 15 can be used to drive the two limiting frames 14 to move in the direction close to each other until they contact the outer wall of the online measurement device body 12 for the health state of the lithium-ion battery and clamp and fix it effectively, so as to avoid the online measurement device body 12 for the health state of the lithium-ion battery colliding with the inner wall of the placement cavity 11 during the movement and causing damage. Through the setting of the sponge block 13, the bottom of the online measurement device body 12 for the health state of the lithium-ion battery can be protected, so as to further improve the protection effect, and solve the problem that most of the existing online measurement devices for the health state of the lithium-ion battery are fixed installation mechanisms, with relatively fixed positions, inconvenient to carry, difficult to detect the health state of the lithium-ion battery well, and poor in convenience;

[0037] Among them: The online measurement device body 12 for the health state of the lithium-ion battery can be powered by the power supply 2, so as to ensure the normal use of the online measurement device body 12 for the health state of the lithium-ion battery. At the same time, when the device moves to an appropriate position, the anti-slip pad 9 can be driven to move downward by rotating the limit screw rod 8 until it contacts the placement surface. The anti-slip pad 9 can be used to increase the friction with the placement surface, so as to avoid the sliding of the moving wheels 6.

[0038] Sleeves 36 are fixedly connected to both ends inside the detection cavity 19. A second spring 37 is arranged inside the sleeve 36. The ends of the two second springs 37 close to each other are fixedly connected with a movable plate 38. The ends of the two movable plates 38 close to each other are fixedly connected with a limiting rod 39. The ends of the two limiting rods 39 close to each other are fixedly connected with a clamping frame 40;

[0039] Specifically, such as Figure 6 、 Figure 9 and Figure 10As shown, when in use, before detection, first open the movable door 16, and then move the two clamping frames 40 in a direction away from each other. When the clamping frames 40 move to appropriate positions, place the lithium-ion battery to be detected between the two clamping frames 40. Then release the clamping frames 40. At this time, the elasticity of the second spring 37 can be utilized to drive the two clamping frames 40 to move in a direction close to each other until they contact both ends of the lithium-ion battery and effectively clamp and fix it, thus facilitating the subsequent detection work on the lithium-ion battery.

[0040] Above the detection chamber 19, a forward and reverse motor 35 is installed. A second gear disk 34 is fixedly sleeved on the output end of the forward and reverse motor 35. The top of the second gear disk 34 is meshed and connected with a first gear disk 32. A rotating rod 33 is fixedly connected inside the first gear disk 32. First conical disks 20 are fixedly sleeved on the outer walls on both sides of the rotating rod 33. The bottom of the first conical disk 20 is meshed and connected with a second conical disk 21. A transmission rod 22 is fixedly connected inside the second conical disk 21. The bottom of the transmission rod 22 is fixedly connected with a bidirectional screw rod 25. A moving block 24 is threadedly connected to the outer wall of the bidirectional screw rod 25. A vertical rod 23 is movably arranged through the surface of the moving block 24. Second hinge blocks 31 are fixedly connected to one side of the two moving blocks 24 close to each other. Hinge rods 30 are hinged to one side of the two second hinge blocks 31 close to each other. First hinge blocks 29 are hinged to one side of the two hinge rods 30 close to each other. Transmission plates 26 are fixedly connected to one side of the two first hinge blocks 29 close to each other. Mounting blocks 28 are fixedly connected to one side of the two transmission plates 26 close to each other. Charge and discharge detection plates 27 are fixedly connected to one side of the two mounting blocks 28 close to each other;

[0041] Specifically, such as Figure 6 、 Figure 7 and Figure 8As shown in the figure, during use, when it is necessary to detect the health status of the fixed lithium-ion battery, the forward and reverse motor 35 can be started by operating the operation panel 18. The output end of the forward and reverse motor 35 can drive the second gear disk 34 to rotate. The rotation of the second gear disk 34 drives the rotating rod 33 to rotate through the first gear disk 32. The rotation of the rotating rod 33 drives the two first conical disks 20 to rotate. The rotation of the two first conical disks 20 drives the two transmission rods 22 to rotate through the two second conical disks 21. The rotation of the two transmission rods 22 drives the two bidirectional screws 25 to rotate. The rotation of the bidirectional screws 25 drives the two moving blocks 24 to move in the direction of approaching each other. The movement of the two moving blocks 24 drives the two second hinge blocks 31 to move. The movement of the two second hinge blocks 31 drives the two transmission plates 26 to move in the direction of approaching each other through the mutual cooperation of the first hinge block 29 and the hinge rod 30. The movement of the two transmission plates 26 drives the two charge and discharge detection plates 27 to move in the direction of approaching each other through the mounting block 28 until they are in contact with the positive and negative electrodes at both ends of the lithium-ion battery. Then, operate the operation panel 18 to discharge the lithium-ion battery, detect and record the data information of the lithium-ion battery during the charge and discharge process, compare the detection result with the rated capacity of the lithium-ion battery, and display the ratio obtained from the comparison through the display screen 17, thereby completing the detection of the health status of the lithium-ion battery. The operation is simple and the detection effect is high.

[0042] Working principle: In this application, the online measurement device body 12 for the health state of lithium-ion batteries can be placed in the protective box 10, and then, in cooperation with the moving wheels 6 at the bottom of the protective box 10, the purpose of facilitating the carrying of the online measurement device body 12 for the health state of lithium-ion batteries can be achieved. At the same time, before the online measurement device body 12 for the health state of lithium-ion batteries is placed in the protective box 10, it is necessary to first move two limiting frames 14 in the direction away from each other. When the two limiting frames 14 are moved to appropriate positions, the online measurement device body 12 for the health state of lithium-ion batteries is placed between the two limiting frames 14. Then, the limiting frames 14 are released. At this time, the elasticity of the first spring 15 can be utilized to drive the two limiting frames 14 to move in the direction close to each other until they contact the outer wall of the online measurement device body 12 for the health state of lithium-ion batteries and clamp and fix it effectively, thereby avoiding damage caused by the collision between the online measurement device body 12 for the health state of lithium-ion batteries and the inner wall of the placement cavity 11 during the movement. Secondly, when it is necessary to detect the health state of the lithium-ion battery, first open the movable door 16, and then move two clamping frames 40 in the direction away from each other. After the clamping frames 40 are moved to appropriate positions, the lithium-ion battery to be detected is placed between the two clamping frames 40. Then, the clamping frames 40 are released. At this time, the elasticity of the second spring 37 can be utilized to drive the two clamping frames 40 to move in the direction close to each other until they contact both ends of the lithium-ion battery and clamp and fix it effectively. Then, operate the operation panel 18 to start the forward and reverse motor 35. The output end of the forward and reverse motor 35 can drive the second gear disk 34 to rotate. The rotation of the second gear disk 34 drives the rotating rod 33 to rotate through the first gear disk 32. The rotation of the rotating rod 33 drives two first conical disks 20 to rotate. The rotation of the two first conical disks 20 drives two transmission rods 22 to rotate through two second conical disks 21. The rotation of the two transmission rods 22 drives two bidirectional screws 25 to rotate. The rotation of the bidirectional screws 25 drives two moving blocks 24 to move in the direction close to each other. The movement of the two moving blocks 24 drives two second hinge blocks 31 to move. The movement of the two second hinge blocks 31 drives two transmission plates 26 to move in the direction close to each other through the mutual cooperation of the first hinge block 29 and the hinge rod 30. The movement of the two transmission plates 26 drives two charge and discharge detection plates 27 to move in the direction close to each other through the mounting block 28 until they contact the positive and negative electrodes at both ends of the lithium-ion battery. Then, operate the operation panel 18 to discharge the lithium-ion battery, detect and record the data information of the lithium-ion battery during the charge and discharge process, compare the detection result with the rated capacity of the lithium-ion battery, and display the ratio obtained by the comparison through the display screen 17, thereby completing the detection of the health state of the lithium-ion battery. The operation is simple and the detection effect is high.

[0043] The standard parts used in this application document can all be purchased from the market, and can also be customized according to the descriptions in the specification and drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. At the same time, the electrical components appearing in this application are all externally connected to a power source and a control switch during use, and the control method is automatically controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art and belongs to the common general knowledge in this field. Therefore, the present invention will not explain the control method and circuit connection in detail. Moreover, the peripheral controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and this peripheral controller is a conventional known device.

[0044] It should be noted that in this article, the term "including", "comprising", or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article, or device.

[0045] In this article, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that due to the limited nature of written expression and the objectively infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, refinements, or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes, or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. A lithium-ion battery health status online measurement device, comprising a protection box (10), characterized in that: The four corners of the bottom of the protection box (10) are all equipped with moving wheels (6), the left side of the protection box (10) is fixedly equipped with a power supply (2), the front end surface of the power supply (2) is provided with a power supply port (3), the right side of the protection box (10) is fixedly connected with an armrest (5), the lower end of the protection box (10) is located below the power supply (2) and the armrest (5) and is provided with a fixing plate (7), the surface of the fixing plate (7) is provided with a threaded limit screw (8), the bottom of the limit screw (8) is fixedly connected with an anti-slip pad (9), the top of the protection box (10) is rotatably provided with a protection cover (1), the top of the protection cover (1) is fixedly connected with a handle (4), and the interior of the protection box (10) is provided with a placement cavity (11 ), a sponge block (13) is fixedly connected to the inner bottom end of the placement cavity (11), first springs (15) are fixedly connected to both sides of the inner wall of the placement cavity (11), and the sides of the two first springs (15) close to each other are fixedly connected to limit frames (14), a lithium-ion battery health status online measurement device body (12) is movably installed between the two limit frames (14), a movable door (16) is rotatably arranged on the outer wall of the lithium-ion battery health status online measurement device body (12), a display screen (17) is arranged on the top of the movable door (16), and an operation panel (18) is arranged on one side of the display screen (17), and a detection cavity (19) is arranged inside the lithium-ion battery health status online measurement device body (12).

2. The device for online measuring the health status of a lithium-ion battery according to claim 1, characterized in that: Both ends of the detection cavity (19) are fixedly connected with sleeves (36), and a second spring (37) is arranged inside the sleeve (36).

3. The device for online measuring the health status of a lithium-ion battery according to claim 2, characterized in that: The ends of the two second springs (37) that are close to each other are fixedly connected to a movable plate (38), the ends of the two movable plates (38) that are close to each other are fixedly connected to a limiting rod (39), and the ends of the two limiting rods (39) that are close to each other are fixedly connected to a clamping frame (40).

4. The device for online measuring the health status of a lithium-ion battery according to claim 1, characterized in that: A forward and reverse motor (35) is installed above the detection chamber (19), and a second gear disc (34) is fixedly sleeved on the output end of the forward and reverse motor (35).

5. The device for online measuring the health status of a lithium-ion battery according to claim 4, characterized in that: The top of the second toothed disc (34) is meshingly connected with the first toothed disc (32), and the interior of the first toothed disc (32) is fixedly connected with a rotating rod (33).

6. The device for online measuring the health status of a lithium-ion battery according to claim 5, characterized in that: A first conical disk (20) is fixedly sleeved on the outer walls of both sides of the rotating rod (33); a second conical disk (21) is meshedly connected to the bottom of the first conical disk (20); and a transmission rod (22) is fixedly connected to the interior of the second conical disk (21).

7. The device for online measuring the health status of a lithium-ion battery according to claim 6, characterized in that: A bidirectional screw rod (25) is fixedly connected to the bottom of the transmission rod (22), a moving block (24) is threadedly connected to the outer wall of the bidirectional screw rod (25), and a vertical rod (23) is movably arranged through the surface of the moving block (24).

8. The device for online measuring the health status of a lithium-ion battery according to claim 7, characterized in that: The two moving blocks (24) are fixedly connected to a second hinge block (31) on one side close to each other, the two second hinge blocks (31) are hinged to a hinge rod (30) on one side close to each other, and the two hinge rods (30) are hinged to a first hinge block (29) on one side close to each other.

9. The device for online measuring the health status of a lithium-ion battery according to claim 8, characterized in that: The two first hinge blocks (29) are fixedly connected to a transmission plate (26) on one side close to each other, the two transmission plates (26) are fixedly connected to a mounting block (28) on one side close to each other, and the two mounting blocks (28) are fixedly connected to a charge and discharge detection plate (27) on one side close to each other.

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