CN219285367U

CN219285367U - High-voltage high-current power battery gas production and expansion force testing device

Info

Publication number: CN219285367U
Application number: CN202320021947.5U
Authority: CN
Inventors: 徐真; 刘承灯
Original assignee: Hubei Techpow Electric Co ltd
Current assignee: Hubei Techpow Electric Co ltd
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-06-30
Anticipated expiration: 2033-01-05

Abstract

The utility model discloses a high-voltage high-current power battery gas production and expansion force testing device, which comprises an expansion force testing device and a gas production testing device, wherein a front end plate, a placing table and a rear end plate are sequentially and fixedly arranged at the top of the expansion force testing device from left to right, a fixed clamping plate and a movable clamping plate are arranged at the top of the placing table, a battery main body is fixedly clamped between the fixed clamping plate and the movable clamping plate, the fixed clamping plate is fixedly connected with the front end plate through an elastic rod, a plane force sensor is fixedly arranged between the fixed clamping plate and the front end plate, a movable sleeve is arranged in the movable clamping plate, and a threaded rod in threaded connection with the movable sleeve is arranged in the movable clamping plate in a penetrating manner. The utility model relates to the technical field of power batteries. The high-voltage high-current power battery gas production and expansion force testing device can test the battery gas production and expansion force simultaneously, and is convenient to use and accurate in testing.

Description

High-voltage high-current power battery gas production and expansion force testing device

Technical Field

The utility model relates to the technical field of power batteries, in particular to a device for testing gas production and expansion force of a high-voltage and high-current power battery.

Background

In order to ensure the quality of the power battery and perform performance verification on newly developed products, hidden danger of the battery in use is reduced, and basic performance experiments are required to be performed on the battery so as to ensure the use safety of the battery.

The physicochemical characteristics of the high-voltage and high-current power battery determine that the gas expansion phenomenon is generated due to the structural change of the electrode active material and the side reaction of the electrolyte during the charge-discharge cycle. With the increase of the time length, the expansion force and the gas production are gradually increased, and the cycle performance and the safety of the battery are influenced. The expansion force of the high-voltage high-current power battery is increased along with the expansion of the anode plate in the charging process, and on the other hand, the gas production in the cell circulation process can further increase the expansion force inside the cell. Therefore, the expansion force and the gas production change of the battery in the use process are monitored in real time, and the expansion force and the gas production change are very important to the structural strength and the use safety in the design of the power battery module.

At present, the gas production and expansion force tests of the power battery are respectively carried out independently. The gas production test is generally connected with a gas pressure test device through a gas connecting hose, and the gas production condition of the battery core is evaluated by observing the change of the gas pressure in the battery. Because the expansion force is influenced by the expansion of the pole piece and the gas production at the same time, the currently used test method can only independently test the change conditions of the expansion and the gas production of the pole piece, so that the influence of the gas production in the expansion force test process cannot be eliminated, the test accuracy is low, in addition, in the traditional expansion force test, the clamp for the battery is inconvenient in the process of installation, the disassembly and the assembly are troublesome, and the detection efficiency is low.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the high-voltage high-current power battery gas production and expansion force testing device, and the device is convenient to use and accurate in testing, and solves the problems existing in the prior art.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a high-voltage heavy current power battery produces gas and expansion force testing arrangement, includes expansion force testing arrangement and produces gas testing arrangement, expansion force testing arrangement top is from left to right fixed mounting in proper order has front end plate, places platform, back end plate, place the top of platform and be provided with fixed splint, movable splint, fixed centre gripping has the battery main part between fixed splint, the movable splint, fixed splint passes through elastic rod and front end plate fixed connection, fixed splint and front end plate between fixed splint fixed mounting have plane force transducer, movable sleeve has been seted up inside the movable splint, movable splint is inside to run through be provided with movable sleeve threaded rod threaded connection's threaded connection, threaded rod one end is rotated with fixed splint through first bearing and is connected, and the other end runs through back end plate and fixedly connected with driven gear, driven gear one side gear engagement transmission is connected with the driving gear;

the gas production testing device is characterized in that liquid is filled in the gas production testing device, an air bag immersed in the liquid is fixedly arranged in the gas production testing device, a limiting rod is fixedly arranged in the gas production testing device, an annular buoy is movably sleeved on the limiting rod, a pointer is fixedly connected to one side of the annular buoy, and a scale rod is fixedly arranged on one side of the limiting rod.

Preferably, the driving gear is fixedly arranged on the rotating shaft, one end of the rotating shaft is rotationally connected with the rear end plate through a second bearing, and the other end of the rotating shaft is fixedly provided with the rocking handle.

Preferably, a hose is fixedly connected between the air bag and the battery body, one end of the hose is connected inside the battery body in a sealing manner, and the other end of the hose is connected inside the air bag in a sealing manner.

Preferably, a plurality of parallel scale marks are arranged on the surface of the scale rod at equal intervals along the axial direction, and a plurality of scale values which are sequentially arranged are arranged on each scale mark with the same number at intervals.

Preferably, the number of the threaded rods is set to 2, and the threaded rods are symmetrically distributed on the movable clamping plate.

Preferably, the anti-slip pad is fixedly adhered to one side wall of the fixed clamping plate and one side wall of the movable clamping plate, which are close to the battery main body.

Advantageous effects

The utility model provides a device for testing gas production and expansion force of a high-voltage high-current power battery. Compared with the prior art, the method has the following beneficial effects:

(1) This kind of high-voltage heavy current power battery produces gas and expansion force testing arrangement, through threaded mounting has the threaded rod on movable splint, the one end fixed connection driven gear of threaded rod, driven gear is connected with driving gear meshing transmission, through manual rotation rocking handle, can remove the regulation to movable splint to carry out quick centre gripping fixedly to inboard battery body through movable splint and fixed splint, this kind of mounting means can reach the quick installation and the dismantlement to battery body, has greatly improved test efficiency.

(2) This high-voltage heavy current power battery produces gas and expansion force testing arrangement, through producing gas testing arrangement internally mounted gag lever post, the annular float is cup jointed to the activity on the gag lever post, and the scale bar is still installed to gag lever post one side, and then moves along with the liquid level under buoyancy effect through annular float, utilizes the pointer on annular float one side to the instruction effect of scale bar, and the person of facilitating the use looks over the liquid level condition of rising directly perceivedly, and the test result is more directly perceived accurate.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a top view of the expansion force testing device of the present utility model;

FIG. 3 is a schematic diagram of the internal structure of the gas production testing device of the present utility model.

In the figure: 1. an expansion force testing device; 2. a front end plate; 3. a rear end plate; 4. a placement table; 5. a fixed clamping plate; 6. a movable clamping plate; 61. a movable sleeve; 7. an elastic rod; 8. a planar load cell; 9. a battery main body; 10. a threaded rod; 11. a first bearing; 12. a driven gear; 13. a drive gear; 14. a rotating shaft; 15. a second bearing; 16. a rocking handle; 17. a gas production testing device; 18. an air bag; 19. a hose; 20. a limit rod; 21. an annular buoy; 22. a pointer; 23. a scale bar.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the present utility model provides a technical solution: the utility model provides a high-voltage heavy current power battery gas production and expansion force testing arrangement, including expansion force testing arrangement 1 and gas production testing arrangement 17, expansion force testing arrangement 1 top is from left to right fixed mounting in proper order has front end plate 2, place the platform 4, rear end plate 3, place the top of platform 4 and be provided with fixed splint 5, movable splint 6, fixed splint 5, fixed centre gripping has battery body 9 between the movable splint 6, fixed splint 5 passes through elastic rod 7 and front end plate 2 fixed connection, fixed splint 5 and front end plate 2 between fixed splint 5 fixed mounting have plane force transducer 8, movable sleeve 61 has been seted up to movable splint 6 inside, movable splint 6 inside run through be provided with movable sleeve 61 threaded rod 10 threaded connection, threaded rod 10 one end is connected with fixed splint 5 rotation through first bearing 11, the other end runs through rear end plate 3 and fixedly connected with driven gear 12, driven gear 12 one side gear engagement transmission is connected with driving gear 13;

the gas production testing device 17 is internally filled with liquid, an air bag 18 immersed in the liquid is fixedly arranged in the gas production testing device 17, a limiting rod 20 is fixedly arranged in the gas production testing device 17, an annular buoy 21 is movably sleeved on the limiting rod 20, a pointer 22 is fixedly connected to one side of the annular buoy 21, and a scale rod 23 is fixedly arranged on one side of the limiting rod 20.

In the embodiment, the driving gear 13 is fixedly arranged on the rotating shaft 14, one end of the rotating shaft 14 is rotationally connected with the rear end plate 3 through a second bearing 15, the other end of the rotating shaft is fixedly provided with a rocking handle 16, and the rotating shaft 14 can be driven to rotate by manually rotating the rocking handle 16; a hose 19 is fixedly connected between the air bag 18 and the battery main body 9, one end of the hose 19 is connected inside the battery main body 9 in a sealing way, the other end of the hose 19 is connected inside the air bag 18 in a sealing way, the air inside the battery main body 9 can be collected inside the air bag 18 through the hose 19, the sealing connection can ensure the tightness of the battery main body 9 in a long-term test, the external air is prevented from entering the battery main body 9, and the battery main body 9 is further prevented from being damaged; the surface of the scale rod 23 is provided with a plurality of parallel scale marks at equal intervals along the axial direction, and each scale mark with the same number at intervals is provided with a plurality of scale values which are sequentially arranged, so that the ascending condition of the liquid level in the gas production testing device 17 can be visually checked; the number of the threaded rods 10 is 2, the threaded rods 10 are symmetrically distributed on the movable clamping plate 6, and the stability of stress on two sides of the movable clamping plate 6 when clamping the battery main body 9 is ensured; the fixed splint 5, the fixed splint 6 are close to the lateral wall of battery body 9 and all fixed the adhesion have the slipmat, increase the stability when centre gripping to battery body 9, avoid battery body 9 to follow fixed splint 5, the inboard landing of movable splint 6.

When the device is used, before a test experiment is carried out, the battery main body 9 is placed on the placing table 4, the rocking handle 16 is manually rotated, the driving gear 13 is driven to rotate, the driven gear 12 is driven to rotate through the gear engagement transmission connection of the driving gear 13 and the driven gear 12, and then the threaded rod 10 is driven to rotate, the movable sleeve 61 in the movable clamp plate 6 is in threaded transmission connection with the threaded rod 10, and then the movable clamp plate 6 and the fixed clamp plate 5 are in close fit with each other to the battery main body 9 from two sides of the battery main body 9, the close fit is in a contact state, the fixed clamp plate 5 and the movable clamp plate 6 do not apply pressure to the battery main body 9 and the planar force sensor 8 in the state, then one end of the hose 19 is connected inside the battery main body 9 in a sealing manner, the other end is connected inside the air bag 18 in a sealing manner, then the battery main body 9 is charged and discharged, the gas production and the expansion force of the battery main body 9 is tested through the planar force sensor 8, the gas production of the battery main body 9 is collected in the liquid in the gas production test device 17, the gas production of the battery main body 9 is expanded, the gas production of the battery main body 17 is driven to be detected, the gas production of the battery main body 17 is in the liquid level is increased, the liquid level is detected by the air bag 18, the water level is detected, the water level is used, the pressure is detected, the pressure is no pressure is applied to the pressure, and the operation condition is detected, and the real-time situation is easy, and the real-time situation can be easily is easy, and the real-time situation can be easily is detected, and the change and the real-time and the device is and can be easily and can be changed.

And all that is not described in detail in this specification is well known to those skilled in the art.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high-voltage heavy current power battery produces gas and expansion force testing arrangement, includes expansion force testing arrangement (1) and produces gas testing arrangement (17), its characterized in that: the device is characterized in that a front end plate (2), a placing table (4) and a rear end plate (3) are sequentially and fixedly arranged at the top of the expansion force testing device (1) from left to right, a fixed clamping plate (5) and a movable clamping plate (6) are arranged at the top of the placing table (4), a battery main body (9) is fixedly clamped between the fixed clamping plate (5) and the movable clamping plate (6), the fixed clamping plate (5) is fixedly connected with the front end plate (2) through an elastic rod (7), a plane force transducer (8) is fixedly arranged between the fixed clamping plate (5) and the front end plate (2), a movable sleeve (61) is arranged inside the movable clamping plate (6), a threaded rod (10) in threaded connection with the movable sleeve (61) is arranged inside the movable clamping plate (6), one end of the threaded rod (10) is rotatably connected with the fixed clamping plate (5) through a first bearing (11), the other end of the threaded rod is fixedly connected with a driven gear (12) through the rear end plate (3), and one side of the driven gear is meshed with a driving gear (13);

the gas production test device is characterized in that liquid is filled in the gas production test device (17), an air bag (18) immersed in the liquid is fixedly arranged in the gas production test device (17), a limiting rod (20) is fixedly arranged in the gas production test device (17), an annular buoy (21) is movably sleeved on the limiting rod (20), a pointer (22) is fixedly connected to one side of the annular buoy (21), and a scale rod (23) is fixedly arranged on one side of the limiting rod (20).

2. The high voltage high current power cell gassing and expansion force testing apparatus according to claim 1, wherein: the driving gear (13) is fixedly arranged on the rotating shaft (14), one end of the rotating shaft (14) is rotatably connected with the rear end plate (3) through a second bearing (15), and the other end of the rotating shaft is fixedly provided with a rocking handle (16).

3. The high voltage high current power cell gassing and expansion force testing apparatus according to claim 1, wherein: a hose (19) is fixedly connected between the air bag (18) and the battery main body (9), one end of the hose (19) is connected inside the battery main body (9) in a sealing mode, and the other end of the hose is connected inside the air bag (18) in a sealing mode.

4. The high voltage high current power cell gassing and expansion force testing apparatus according to claim 1, wherein: the surface of the scale rod (23) is provided with a plurality of parallel scale marks at equal intervals along the axial direction, and each scale mark with the same number at intervals is provided with a plurality of scale values which are sequentially arranged.

5. The high voltage high current power cell gassing and expansion force testing apparatus according to claim 1, wherein: the number of the threaded rods (10) is set to 2, and the threaded rods (10) are symmetrically distributed on the movable clamping plate (6).

6. The high voltage high current power cell gassing and expansion force testing apparatus according to claim 1, wherein: the anti-slip mat is fixedly adhered to one side wall of the fixed clamping plate (5) and one side wall of the movable clamping plate (6) close to the battery main body (9).