CN212205953U - Electricity core inflation measuring device - Google Patents
Electricity core inflation measuring device Download PDFInfo
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- CN212205953U CN212205953U CN202020829587.8U CN202020829587U CN212205953U CN 212205953 U CN212205953 U CN 212205953U CN 202020829587 U CN202020829587 U CN 202020829587U CN 212205953 U CN212205953 U CN 212205953U
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- 230000005611 electricity Effects 0.000 title abstract description 9
- 230000010261 cell growth Effects 0.000 claims abstract description 23
- 238000006073 displacement reaction Methods 0.000 claims description 21
- 238000007572 expansion measurement Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 description 14
- 230000009471 action Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000004308 accommodation Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
The utility model discloses an electricity core inflation measuring device belongs to power battery technical field. The cell expansion measuring device comprises a fixed assembly, a movable assembly and a pressure measuring part, wherein the fixed assembly comprises a first fixed plate, a second fixed plate and a guide shaft, and two ends of the guide shaft are connected to the first fixed plate and the second fixed plate; the movable assembly sets up between first fixed plate and second fixed plate, and sliding connection is on the guiding axle, including setting gradually: the first movable plate is connected with the guide shaft in a sliding mode through a locking slide block bearing; a second movable plate connected with the first movable plate through an elastic member having rigidity; a third movable plate forming a containing space with the second movable plate, wherein the containing space is used for containing the battery core; the pressure measuring part is used for measuring the pressure between the second fixed plate and the third movable plate. The utility model discloses an electricity core inflation measuring device has improved the measuring accuracy of electricity core inflation characteristic and to the compatibility of electricity core.
Description
Technical Field
The utility model relates to a power battery technical field especially relates to an electricity core inflation measuring device.
Background
The electric core is at the in-process of circulation charge-discharge, and its volume can present certain inflation, and this kind of inflation can cause adverse effect to the life of electric core, battery and module. Because, electric core often can demonstrate different inflation degrees because of receiving different clamping force effects, consequently research pretightning force and electric core inflation degree between the corresponding relation, can confirm that reserve clearance and elasticity filler material between electric core and the electric core provide the reference for the research and development personnel shell and the electric core of monomer battery, or in the battery module.
In the existing design, the structure mode generally adopted for measuring the cell expansion characteristic is as follows: the combination of the clamping plates and the pressure sensor clamps the battery cell through the two clamping plates, and the distance between the clamping plates is measured by a vernier caliper. Due to the fact that the clamping plate is high in rigidity, expansion of the battery cell is limited to a certain extent, and the thickness of the battery cell deforms too small, so that data measured by the pressure sensor is large. The cell measurement structure with equivalent rigidity is not considered, the measured expansion force is too large, the cell deformation size is too small, and the measurement result is inaccurate; in addition, the position of the clamping plate is fixed, so that the expansion change of the battery cell cannot be continuously output, the characteristic that the battery cell expands in a single battery or a battery module is not consistent, and the expansion situation of the battery cell in actual use cannot be accurately reflected; and the splint structure is fixed, can only be applicable to the electric core of single size thickness, and the compatibility is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electricity core inflation measuring device improves the bulging force of electricity core and the measuring accuracy of deformation size to improve the compatibility to electric core.
To achieve the purpose, the utility model adopts the following technical proposal:
a cell expansion measurement device comprising:
the fixing assembly comprises a first fixing plate, a second fixing plate and a guide shaft, wherein two ends of the guide shaft are connected to the first fixing plate and the second fixing plate;
the movable assembly is arranged between the first fixing plate and the second fixing plate and is connected to the guide shaft in a sliding mode, and comprises the following components in sequence: the first movable plate is connected with the guide shaft in a sliding mode through a locking slide block bearing; a second movable plate connected with the first movable plate through an elastic member having rigidity; a third movable plate forming a containing space with the second movable plate, wherein the containing space is used for containing the battery core;
and the pressure measuring part is arranged between the third movable plate and the second fixed plate and used for measuring the pressure between the second fixed plate and the third movable plate.
Optionally, the elastic element includes a spring sleeved on the guide shaft, and two ends of the spring are respectively abutted against the first movable plate and the second movable plate.
Optionally, the locking slider bearing comprises a first linear bearing slidably connected to the guide shaft, the first linear bearing being mounted on the first movable plate, the first linear bearing having a locking member capable of locking the position of the first linear bearing relative to the guide shaft.
Optionally, the movable assembly further includes a second linear bearing slidably connected to the guide shaft, and the second linear bearing is mounted on the second movable plate; and/or
The movable assembly further comprises a third linear bearing in sliding connection with the guide shaft, and the third linear bearing is mounted on the third movable plate.
Optionally, the cell expansion measuring device further includes a displacement measuring element for measuring the displacement of the second movable plate along the axial direction of the guide shaft; the displacement measuring member is
A vernier caliper; or
A displacement sensor mounted on the first movable plate.
Optionally, the pressure measuring part includes a pressure sensor, and the pressure sensor is disposed at the bottom of the third movable plate and fixed on the second fixed plate.
Optionally, the fixing assembly comprises four guide shafts, and the four guide shafts are symmetrically installed between the first fixing plate and the second fixing plate through fasteners.
Optionally, the cell expansion measuring device further includes a thrust assembly for pushing the first movable plate.
Optionally, the thrust assembly includes a screw, a nut, and a driving member disposed at one end of the screw, the nut is mounted on the first fixing plate, the screw passes through the nut, and the other end is connected to the first movable plate.
Optionally, the drive member comprises a handle or a power source.
The utility model has the advantages that:
the utility model provides an electric core expansion measuring device, the fixed subassembly is used for providing the support of electric core expansion measuring device, first fly leaf and second fly leaf pass through the elastic component and are connected, during the measurement, the electric core is put in the accommodation space, according to the size of electric core, through external force adjustment first fly leaf, make first fly leaf drive second fly leaf move, thus adjust the size of accommodation space, and give an pretightning force to the electric core; after the battery cell expands, the elastic piece has elasticity and rigidity, so that under the action of the expansion force of the battery cell, the second movable plate extrudes the elastic piece to move towards the first movable plate, and the third movable plate tends to move towards the second fixed plate; the displacement of the second movable plate is measured through the displacement measuring part, and the pressure borne by the third movable plate is measured through the pressure measuring part, so that the expansion force and the deformation size of the battery cell are obtained.
The arrangement of the elastic piece with rigidity can be equivalent to the rigidity effect of the battery module or the battery shell on the battery core, and meanwhile, the expansion of the battery core can be prevented from being limited, the expansion situation of the battery core in actual use can be truly reflected, the expansion force and the deformation size can be continuously output, and the measurement accuracy of the expansion force and the deformation size is improved; the second movable plate and the third movable plate are arranged on the guide shaft in a sliding mode, so that the movement resistance is avoided, and the measurement accuracy is further improved; the first movable plate can slide along the guide shaft under the action of external force, so that the size of the accommodating space can be adjusted, the battery cell accommodating device is suitable for various battery cells with different sizes and thicknesses, the compatibility is improved, various pre-tightening forces can be set in an adjustable mode, measurement data are enriched, and various choices are provided for users; in addition, the locking slide block bearing enables the first movable plate to slide along the guide shaft under the action of external force, and after the accommodating space is adjusted, the first movable plate can be locked on the guide shaft, so that the first movable plate is prevented from moving due to the expansion force of the electric core, and the accuracy of a measuring result is further ensured.
Drawings
Fig. 1 is a schematic structural diagram of a cell expansion measuring apparatus according to an embodiment of the present invention;
fig. 2 is a front view of fig. 1.
In the figure:
1-a stationary component; 11-a first fixing plate; 12-a second fixing plate; 13-a guide shaft; 14-a fastener;
2-a movable component; 21-a first flap; 22-a second flap; 23-a third flap; 24-a first linear bearing; 241-a locking member; 25-a second linear bearing; 26-a third linear bearing; 27-an elastic member;
3-a pressure measuring member;
4-a thrust assembly; 41-lead screw; 42-a nut; 43-handle.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The embodiment provides a cell expansion measuring device, as shown in fig. 1 and fig. 2, which includes a fixed assembly 1, a movable assembly 2, and a pressure measuring part 3, where the fixed assembly 1 includes a first fixed plate 11, a second fixed plate 12, and a guide shaft 13 whose two ends are connected to the first fixed plate 11 and the second fixed plate 12; the movable assembly 2 is arranged between the first fixing plate 11 and the second fixing plate 12 and is connected to the guide shaft 13 in a sliding manner, and comprises the following components in sequence: a first movable plate 21 slidably coupled to the guide shaft 13 through a locking slider bearing; the second flap 22 connected to the first flap 21 by a resilient member 27 with rigidity; a third flap 23 forming a receiving space with the second flap 22, the receiving space being for receiving a battery cell; the pressure measuring device 3 is disposed between the third movable plate 23 and the second fixed plate 12, and is used for measuring the pressure between the second fixed plate 12 and the third movable plate 23.
The fixed assembly 1 is used for providing support for a cell expansion measuring device, the first movable plate 21 is connected with the second movable plate 22 through an elastic piece 27, during measurement, a cell is placed in the accommodating space, the first movable plate 21 is adjusted through external force according to the size of the cell, and the first movable plate 21 drives the second movable plate 22 to move, so that the size of the accommodating space is adjusted, and a pre-tightening force is given to the cell; after the cell is expanded, due to the elasticity and rigidity of the elastic member 27, under the action of the expansion force of the cell, the second movable plate 22 presses the elastic member 27 to move towards the first movable plate 21, and the third movable plate 23 tends to move towards the second fixed plate 12; the displacement of the second movable plate 22 is measured by the displacement measuring part, and the pressure applied to the third movable plate 23 is measured by the pressure measuring part 3, so that the expansion force and the deformation size of the battery cell are obtained.
The arrangement of the elastic part 27 with rigidity can be equivalent to the rigidity effect of a battery module or a battery shell on the battery core, and meanwhile, the limitation of the expansion of the battery core can be avoided, the expansion situation of the battery core in actual use can be truly reflected, the expansion force and the deformation size can be continuously output, and the measurement accuracy of the expansion force and the deformation size is improved; the second movable plate 22 and the third movable plate 23 are slidably arranged on the guide shaft 13, so that movement resistance is avoided, and the measurement accuracy is further improved; the first movable plate 21 can slide along the guide shaft 13 under the action of external force, so that the size of the accommodating space can be adjusted, the battery cell accommodating device is suitable for various battery cells with different sizes and thicknesses, the compatibility is improved, various pre-tightening forces can be set in an adjustable mode, measurement data are enriched, and various choices are provided for users; in addition, the locking slide block bearing can enable the first movable plate 21 to slide along the guide shaft 13 under the action of external force, and after the accommodating space is adjusted, the first movable plate 21 can be locked on the guide shaft 13, so that the movement caused by the expansion force of the electric core is avoided, and the accuracy of a measuring result is further ensured.
In this embodiment, referring to fig. 1 and 2, the fixing assembly 1 includes four guide shafts 13, the four guide shafts 13 are symmetrically installed between the first fixing plate 11 and the second fixing plate 12, so that the fixing assembly 1 is installed stably, and the first fixing plate 11 and the second fixing plate 12 are installed through the fastening member 14, so that the operation is simple and convenient; specifically, counterbores are formed in corresponding positions of the first fixing plate 11 and the second fixing plate 12, threaded holes are formed in two ends of the guide shaft 13 respectively, and the guide shaft is fixed and installed through bolts, so that the structure is simple and stable.
Optionally, the cell expansion measuring device further includes a thrust assembly 4 for pushing the first movable plate 21, so as to adjust the accommodating space and the preload. In this embodiment, the thrust assembly 4 includes a screw 41, a nut 42 and a driving member disposed at one end of the screw 41, the nut 42 is mounted on the first fixed plate 11, the screw 41 passes through the nut 42, and the other end of the screw is connected to the first movable plate 21, and the driving member drives the screw 41 to rotate and move on the nut 42, so as to drive the first movable plate 21 to slide on the guide shaft 13. Specifically, the driving part comprises a handle 43, and a user can screw the handle 43 to move the lead screw 41, so that the manufacturing cost is low; or the driving part is a power source such as a motor or a rotary cylinder, so that the automatic movement of the lead screw 41 is realized, and the operation is convenient.
Optionally, the elastic element 27 includes a spring sleeved on the guide shaft 13, two ends of the spring are respectively abutted against the first movable plate 21 and the second movable plate 22, the spring has good rigidity and elasticity, the acting force is stable, and the spring has good elastic deformation capability, is suitable for repeated cycle testing, and the stress and the deformation of the spring are in a linear relationship, so that the design of pre-tightening force is facilitated; in this embodiment, the device includes four springs respectively sleeved on the four guide shafts 13, so that the second movable plate 22 is uniformly stressed, and the measurement results of the expansion force and the deformation size are improved.
Optionally, the locking slider bearing comprises a first linear bearing 24 slidably connected with the guide shaft 13, the first linear bearing 24 is mounted on the first movable plate 21, the first linear bearing 24 has a locking member 241, the locking member 241 can lock the position of the first linear bearing 24 relative to the guide shaft 13; when the first movable plate 21 needs to be adjusted, the locking member 241 is opened, so that the first movable plate 21 slides on the guide shaft 13, and the sliding smoothness is increased; when the adjustment is finished, the locking piece 241 is locked, so that the measuring result is prevented from being influenced by the movement of the power core under the action of expansion force; specifically, the locking member 241 may be a sleeve chuck that is clamped at the end of the first linear bearing 24, and the sleeve chuck is sleeved on the guide shaft 13 to prevent the first linear bearing 24 from sliding; in this embodiment, the combination of the first linear bearing 24 and the locking member 241 may be a linear bearing with a clamping handle, which is the prior art and will not be described again; four linear bearings with clamping handles in this embodiment are respectively connected to the first movable plate 21.
Optionally, the movable assembly 2 further includes a second linear bearing 25 slidably connected to the guide shaft 13, and the second linear bearing 25 is mounted on the second movable plate 22, so that the second movable plate 22 can smoothly slide on the guide shaft 13 under the action of the cell expansion force, thereby reducing the sliding resistance and improving the accuracy of the measurement result of the cell deformation size. Similarly, optionally, the movable assembly 2 further includes a third linear bearing 26 slidably connected to the guide shaft 13, and the third linear bearing 26 is mounted on the third movable plate 23, so that the third movable plate 23 can smoothly slide on the guide shaft 13 under the action of the cell expansion force, thereby reducing the sliding resistance, enabling the pressure measuring part 3 to accurately measure the pressure from the third movable plate 23, and improving the accuracy of the measurement result of the cell expansion force. In this embodiment, the four second linear bearings 25 are respectively connected to the second movable plate 22, and the four third linear bearings 26 are respectively connected to the third movable plate 23, so that the second movable plate 22 and the third movable plate 23 can move stably to avoid deflection.
Optionally, the cell expansion measuring device further includes a displacement measuring unit for measuring the displacement of the second movable plate 22 along the axial direction of the guide shaft 13; in this embodiment, the displacement measuring device is a vernier caliper, and during measurement, the first movable plate 21 can be used as a reference point to measure the displacement of the second movable plate 22, so that the operation is simple and convenient; in other embodiments, a scale may be disposed on the first movable plate 21 to measure the displacement data, or the displacement measuring element is a displacement sensor mounted on the first movable plate 21 to automatically measure the displacement.
Optionally, the pressure measurement component 3 includes a pressure sensor, the pressure sensor is disposed at the bottom of the third movable plate 23 and fixed on the second fixing plate 12, the battery cell expands to push the third movable plate 23 to act on the pressure sensor, the pressure sensor measures the pressure of the third movable plate to obtain an expansive force, and the pressure sensor has the characteristics of reliable operation, stable performance and the like, and can conveniently and accurately record pressure data.
In this embodiment, the step of measuring the battery cell by using the battery cell measuring apparatus includes:
before testing, according to the thickness of the battery cell, the adjusting handle 43 enables the screw 41 to drive the first movable plate 21 and the second movable plate 22 to slide along the guide shaft 13; during testing, the adjusting handle 43 makes the first movable plate 21 and the second movable plate 22 slide along the guide shaft 13 again to obtain a pre-tightening force acting on the battery cell, and the position of the first linear bearing 24 relative to the guide shaft 13 at this time is locked by the locking member 241; carrying out a cycle test on the battery cell, wherein the battery cell expands; along with the cycle test, measuring the displacement of the second movable plate 22 by using a vernier caliper to obtain the deformation size of the battery cell; the pressure sensor measures the pressure of the third movable plate 23 and stores it accordingly.
When the battery cores with different sizes need to be replaced, the handle 43 is screwed, and the accommodating space is adjusted; when different pretightening forces need to be set, the handle 43 is screwed to perform corresponding adjustment.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A cell expansion measurement device, comprising:
the fixing assembly (1) comprises a first fixing plate (11), a second fixing plate (12) and a guide shaft (13) of which two ends are connected to the first fixing plate (11) and the second fixing plate (12);
the movable assembly (2) is arranged between the first fixing plate (11) and the second fixing plate (12) and is connected to the guide shaft (13) in a sliding mode, and comprises: a first movable plate (21) which is connected with the guide shaft (13) in a sliding way through a locking slide block bearing; a second flap (22) connected to the first flap (21) by means of a resilient element (27) with rigidity; a third movable plate (23) forming a receiving space with the second movable plate (22), the receiving space being used for receiving a battery cell;
the pressure measuring part (3) is arranged between the third movable plate (23) and the second fixed plate (12) and is used for measuring the pressure between the second fixed plate (12) and the third movable plate (23).
2. The cell expansion measuring device according to claim 1, wherein the elastic member (27) comprises a spring fitted over the guide shaft (13), and both ends of the spring abut against the first movable plate (21) and the second movable plate (22), respectively.
3. The cell expansion measuring device according to claim 1, characterized in that the locking slide bearing comprises a first linear bearing (24) in sliding connection with the guide shaft (13), the first linear bearing (24) being mounted on the first movable plate (21), the first linear bearing (24) having a locking member (241), the locking member (241) being capable of locking the position of the first linear bearing (24) relative to the guide shaft (13).
4. The cell expansion measuring device according to claim 1, wherein the movable assembly (2) further comprises a second linear bearing (25) in sliding connection with the guide shaft (13), the second linear bearing (25) being mounted on the second movable plate (22); and/or
The movable assembly (2) further comprises a third linear bearing (26) connected with the guide shaft (13) in a sliding manner, and the third linear bearing (26) is installed on the third movable plate (23).
5. The cell expansion measuring device according to claim 1, further comprising a displacement measuring member for measuring a displacement of the second movable plate (22) in the axial direction of the guide shaft (13); the displacement measuring part is
A vernier caliper; or
A displacement sensor mounted on the first movable plate (21).
6. The cell expansion measuring device according to claim 1, wherein the pressure measuring member (3) comprises a pressure sensor, and the pressure sensor is disposed at the bottom of the third movable plate (23) and fixed on the second fixed plate (12).
7. The cell expansion measurement device according to any of claims 1-6, characterized in that the fixing assembly (1) comprises four guide shafts (13), and the four guide shafts (13) are symmetrically installed between the first fixing plate (11) and the second fixing plate (12) through fasteners (14).
8. The cell expansion measurement device according to any of claims 1-6, characterized in that it further comprises a thrust assembly (4) for pushing the first movable plate (21).
9. The cell expansion measuring device according to claim 8, wherein the thrust assembly (4) comprises a screw (41), a nut (42) and a driving member disposed at one end of the screw (41), the nut (42) is mounted on the first fixing plate (11), the screw (41) passes through the nut (42), and the other end is connected to the first movable plate (21).
10. The cell expansion measurement device according to claim 9, wherein the drive member comprises a handle (43) or a power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020829587.8U CN212205953U (en) | 2020-05-18 | 2020-05-18 | Electricity core inflation measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020829587.8U CN212205953U (en) | 2020-05-18 | 2020-05-18 | Electricity core inflation measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN212205953U true CN212205953U (en) | 2020-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020829587.8U Active CN212205953U (en) | 2020-05-18 | 2020-05-18 | Electricity core inflation measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078368A (en) * | 2021-02-25 | 2021-07-06 | 天津力神电池股份有限公司 | Semi-automatic inflation expansion equipment for cylindrical lithium ion battery cell |
| CN113340575A (en) * | 2021-04-30 | 2021-09-03 | 中国航天空气动力技术研究院 | Pressure-bearing testing mechanism |
| CN114544041A (en) * | 2021-08-18 | 2022-05-27 | 万向一二三股份公司 | Lithium ion battery expansion pressure displacement detection device and detection method |
-
2020
- 2020-05-18 CN CN202020829587.8U patent/CN212205953U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078368A (en) * | 2021-02-25 | 2021-07-06 | 天津力神电池股份有限公司 | Semi-automatic inflation expansion equipment for cylindrical lithium ion battery cell |
| CN113340575A (en) * | 2021-04-30 | 2021-09-03 | 中国航天空气动力技术研究院 | Pressure-bearing testing mechanism |
| CN114544041A (en) * | 2021-08-18 | 2022-05-27 | 万向一二三股份公司 | Lithium ion battery expansion pressure displacement detection device and detection method |
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