CN220729512U - Circulating expansion force testing device for lithium iron phosphate square battery - Google Patents
Circulating expansion force testing device for lithium iron phosphate square battery Download PDFInfo
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- CN220729512U CN220729512U CN202322005500.1U CN202322005500U CN220729512U CN 220729512 U CN220729512 U CN 220729512U CN 202322005500 U CN202322005500 U CN 202322005500U CN 220729512 U CN220729512 U CN 220729512U
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- shaped frame
- frame body
- guide pillar
- pressing plate
- plane pressing
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- 238000012360 testing method Methods 0.000 title claims abstract description 23
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 title claims abstract description 14
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model relates to a cyclic expansion force testing device of a lithium iron phosphate square battery, which comprises a U-shaped frame body, a first plane pressing plate, a second plane pressing plate, a guide post, a driving mechanism and a pressure sensor, wherein the U-shaped frame body comprises a U-shaped frame body bottom plate and a U-shaped frame body top plate which are arranged in parallel; a first plane pressing plate and a second plane pressing plate are arranged in parallel between the U-shaped frame bottom plate and the U-shaped frame top plate, the first plane pressing plate and the second plane pressing plate are movably sleeved on the guide column component, a driving mechanism is arranged on the first plane pressing plate, and a pressure sensor is arranged on the bottom surface of the first plane pressing plate; a battery groove is formed in the bottom plate of the U-shaped frame body and used for accommodating a battery to be tested; the driving mechanism comprises a screw, one end of the screw is in threaded connection with the top plate of the U-shaped frame body, and the bottom end of the screw is connected with the first plane pressing plate. According to the utility model, the pressure sensor is tested through the two liftable plane pressing plates, uneven stress of the battery is avoided, and the accuracy of test data is improved.
Description
Technical Field
The utility model relates to the technical field of battery performance test, in particular to a cyclic expansion force test device for a lithium iron phosphate square battery.
Background
In the cyclic charge and discharge process of the lithium iron phosphate square battery, as lithium ions are separated and inserted between the positive electrode and the negative electrode and gas is generated in the battery, the size of the battery can be changed, the thickness of the battery can be gradually thickened, if the battery is limited in a constant space, the battery can generate a certain acting force on the outer wall of the space due to expansion, the force can be defined as the expansion force of the battery, the cyclic performance and the safety performance of the battery can be influenced by the overlarge expansion force, and the module design of the battery is directly influenced, so that the cyclic expansion force data collection of the battery is very important in the battery design stage.
The contact surface of the existing pressure sensor cannot be completely consistent with the surface of the battery, if the sensor is directly contacted with the surface of the battery, uneven stress of the battery can be caused, and the expansion force of the battery cannot be accurately tested; meanwhile, because batteries with different specifications have certain differences, the testing device is required to be compatible with batteries with different sizes.
Disclosure of Invention
The utility model aims to overcome the defects, and provides a cyclic expansion force testing device for a lithium iron phosphate square battery, which improves the accuracy of test data and can be compatible with batteries with different sizes for carrying out expansion force testing in the cyclic process.
The purpose of the utility model is realized in the following way:
the device comprises a U-shaped frame body, a first plane pressing plate, a second plane pressing plate, a guide pillar, a driving mechanism and a pressure sensor, wherein the U-shaped frame body is in a transverse U shape and comprises a U-shaped frame body bottom plate and a U-shaped frame body top plate which are arranged in parallel; the U-shaped frame body bottom plate and the U-shaped frame body top plate are sequentially and parallelly provided with a first plane pressing plate and a second plane pressing plate from top to bottom, the first plane pressing plate and the second plane pressing plate are connected with the U-shaped frame body through a guide pillar component, the first plane pressing plate and the second plane pressing plate are movably sleeved on the guide pillar component, a driving mechanism is arranged on the first plane pressing plate, and a pressure sensor is arranged on the bottom surface of the first plane pressing plate; the U-shaped frame body bottom plate is provided with a detachable battery groove for holding a battery to be tested; the driving mechanism comprises a screw; one end of the screw rod is in threaded connection with the top plate of the U-shaped frame body, and the bottom end of the screw rod is connected to the center of the first plane pressing plate and used for driving the lifting of the first plane pressing plate.
Further, the guide pillar component comprises a first guide pillar, a second guide pillar, a third guide pillar and a fourth guide pillar, wherein the first guide pillar and the second guide pillar are arranged at one end of the U-shaped frame body, the third guide pillar and the fourth guide pillar are symmetrically arranged at the other end of the U-shaped frame body, and the first guide pillar, the second guide pillar, the third guide pillar and the fourth guide pillar are uniformly distributed around the periphery of the battery groove.
Further, the top ends of the first guide post, the second guide post, the third guide post and the fourth guide post extend out of the top plate of the U-shaped frame body and are fixed through bolts, and the other ends penetrate through the first plane pressing plate and the second plane pressing plate, reach the bottom plate of the U-shaped frame body and are fixed on the bottom plate of the U-shaped frame body.
Further, the part of the screw rod extending out of the top plate of the U-shaped frame body is set as a bearing end so as to bear external rotation driving force.
Further, a hand wheel is arranged at the top of the screw rod.
Further, insulating strips are adhered to the surfaces of the U-shaped frame body, the battery groove and the second planar pressing plate.
Compared with the prior art, the utility model has the beneficial effects that:
(1) According to the utility model, the distance between the first planar pressing plate and the battery groove can be adjusted by driving the driving mechanism, and the second planar pressing plate can be arranged to move up and down relative to the first planar pressing plate, so that when the first planar pressing plate moves down, the first planar pressing plate is abutted against the second planar pressing plate through the pressure sensor, the second planar pressing plate presses the battery, and the pressure of the battery is monitored, so that the real-time monitoring of the expansion force of the battery in the circulation process is realized, the uneven stress of the battery is avoided by the planar pressing plate, and the accuracy of test data is improved.
(2) The utility model adopts the U-shaped frame structure, and is more stable and reliable than a simple four-bar mechanism.
(3) The driving mechanism of the utility model adopts the screw rod, has simple structure, easy realization, low cost and reliable connection, and the bearing end of the screw rod is provided with the hand wheel, so the operation is simple and the practicability is strong.
(4) According to the utility model, the plurality of guide posts are arranged, so that the stable sliding and levelness of the first plane pressing plate and the second plane pressing plate on the guide posts are facilitated, and the overall stability and the use effect of the device are improved.
(5) According to the utility model, the pressure sensor is fixed at the bottom of the first planar pressing plate, so that the pressure sensor stably moves along with the first planar pressing plate, and compared with the pressure sensor fixed on the second planar pressing plate, the battery is balanced in stress and more accurate in test data.
(6) According to the utility model, the teflon adhesive tape is stuck on the surfaces of the U-shaped frame body, the battery groove and the second planar pressing plate, so that an insulating effect is achieved, and the short circuit of the battery is prevented.
(7) The battery groove is detachable, so that the battery grooves with different specifications can be conveniently replaced, and the test of batteries with different types can be realized.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a front view of the present utility model.
Fig. 3 is a side view of the present utility model.
Fig. 4 is a top view of the present utility model.
Fig. 5 is a schematic view of a battery recess according to the present utility model.
In the figure:
the battery pack comprises a U-shaped frame body 1, a U-shaped frame body bottom plate 11, a U-shaped frame body top plate 12, a battery groove 2, a first plane pressing plate 3, a second plane pressing plate 4, a guide column assembly 5, a first guide column 51, a second guide column 52, a third guide column 53, a fourth guide column 54, a driving mechanism 6, a screw 61, a connecting end 62, a threaded hole 63, a bearing end 64, a hand wheel 65, a pressure sensor 7 and a battery 8.
Detailed Description
In order to better understand the technical solution of the present utility model, the following detailed description will be made with reference to the accompanying drawings. It should be understood that the following embodiments are not intended to limit the embodiments of the present utility model, but are merely examples of embodiments that may be employed by the present utility model. It should be noted that, the description herein of the positional relationship of the components, such as the component a being located above the component B, is based on the description of the relative positions of the components in the drawings, and is not intended to limit the actual positional relationship of the components.
Example 1
Referring to fig. 1-5, fig. 1 depicts a schematic structural diagram of a cyclic expansion force testing device for lithium iron phosphate square batteries. As shown in the figure, the cyclic expansion force testing device of the lithium iron phosphate square battery comprises a U-shaped frame body 1, a first plane pressing plate 3, a second plane pressing plate 4, a guide pillar 5, a driving mechanism 6 and a pressure sensor 7, wherein the U-shaped frame body 1 is in a transverse U shape and comprises a U-shaped frame body bottom plate 11 and a U-shaped frame body top plate 12 which are arranged in parallel, and vertical plates are arranged between the ends of the U-shaped frame body bottom plate 11 and the U-shaped frame body top plate 12 and are vertically connected, so that the transverse U-shaped frame body 1 is formed; a first plane pressing plate 3 and a second plane pressing plate 4 are sequentially arranged in parallel from top to bottom between the U-shaped frame bottom plate 11 and the U-shaped frame top plate 12, and the first plane pressing plate 3 and the second plane pressing plate 4 are connected with the U-shaped frame 1 through a guide pillar component 5; the first plane pressing plate 3 is provided with a driving mechanism 6, and the bottom surface of the first plane pressing plate 3 is provided with a pressure sensor 7.
The detachable battery groove 2 is arranged on the U-shaped frame body bottom plate 11 and is used for accommodating the battery 8 to be tested, and the arrangement of the detachable battery groove 2 is beneficial to adapting to the batteries 8 with different sizes and specifications, so that the batteries 8 are rapidly assembled and configured with the testing device.
The guide column assembly 5 comprises a first guide column 51, a second guide column 52, a third guide column 53 and a fourth guide column 54, wherein the first guide column 51 and the second guide column 52 are arranged at one end of the U-shaped frame body 1, the third guide column 53 and the fourth guide column 54 are symmetrically arranged at the other end of the U-shaped frame body 1, namely, the first guide column 51, the second guide column 52, the third guide column 53 and the fourth guide column 54 are uniformly distributed around the periphery of the battery groove 2; the top ends of the first guide post 51, the second guide post 52, the third guide post 53 and the fourth guide post 54 extend out of the top plate 12 of the U-shaped frame body and are fixed through bolts, and the other ends penetrate through the first plane pressing plate 3 and the second plane pressing plate 4, reach the bottom plate 11 of the U-shaped frame body and are fixed on the bottom plate 11 of the U-shaped frame body.
The driving mechanism 6 comprises a screw 61, a connecting end 62, a threaded hole 63, a bearing end 64 and a hand wheel 65, wherein the bottom end of the screw 61 is the connecting end 62, the connecting end 62 is rotatably connected to the center of the first plane pressing plate 3, the U-shaped frame body top plate 12 is provided with the threaded hole 63 for the screw 61 to pass through and be screwed with, the screw 61 is matched with the threaded hole 63, the part of the screw 61 extending out of the U-shaped frame body top plate 12 is provided with the bearing end 64 for bearing external rotation driving force, and the top of the screw 61 is provided with the hand wheel 65; thus, the screw 61 is rotated by the hand wheel 65, so that the first planar pressing plate 3 is driven, and the first planar pressing plate 3 can be positioned at any position on the moving path thereof by self-locking.
And teflon adhesive tapes are adhered to the surfaces of the U-shaped frame body 1, the battery groove 2 and the second planar pressing plate 4, so that short circuit of the battery is prevented.
Working principle:
when the cyclic expansion force testing device for the lithium iron phosphate square battery is used, the battery 8 is assembled in the battery groove 2, then the hand wheel 65 is rotated, the first plane pressing plate 3 is driven by the screw 61, the first plane pressing plate 3 drives the second plane pressing plate 4 to move towards the battery groove 2, the second plane pressing plate 4 is firstly contacted with the battery 8, the sensing end of the pressure sensor 7 arranged at the bottom of the first plane pressing plate 3 is contacted with the second plane pressing plate 4 along with the downward pressing of the first plane pressing plate 3, the pressure sensor presses the second plane pressing plate 4, the second plane pressing plate 4 presses the surface of the battery 8, the hand wheel 65 is loosened, the screw 61 and the threaded hole 63 of the top plate 12 of the U-shaped frame body are self-locked, looseness is prevented, and the expansion force in the battery cyclic process is monitored through the implementation.
After the battery 8 is tested, the hand wheel 65 is reversely rotated to drive the first plane pressing plate 3 to move upwards, the second plane pressing plate 4 is manually moved upwards to be away from the surface of the battery 8, and the battery 8 is taken out to finish the test.
The foregoing is merely a specific application example of the present utility model, and the protection scope of the present utility model is not limited in any way. All technical schemes formed by equivalent transformation or equivalent substitution fall within the protection scope of the utility model.
Claims (5)
1. The utility model provides a cyclic expansion power testing arrangement of lithium iron phosphate square battery which characterized in that: the novel high-pressure type hydraulic pressure test device comprises a U-shaped frame body (1), a first plane pressure plate (3), a second plane pressure plate (4), a guide column component (5), a driving mechanism (6) and a pressure sensor (7), wherein the U-shaped frame body (1) is of a transverse U shape and comprises a U-shaped frame body bottom plate (11) and a U-shaped frame body top plate (12) which are arranged in parallel; the U-shaped frame body bottom plate (11) and the U-shaped frame body top plate (12) are sequentially arranged in parallel from top to bottom, the first plane pressing plate (3) and the second plane pressing plate (4) are connected with the U-shaped frame body (1) through a guide pillar component (5), the first plane pressing plate (3) and the second plane pressing plate (4) are movably sleeved on the guide pillar component (5), a driving mechanism (6) is arranged on the first plane pressing plate (3), and a pressure sensor (7) is arranged on the bottom surface of the first plane pressing plate (3); a detachable battery groove (2) is formed in the U-shaped frame body bottom plate (11) and is used for accommodating a battery (8) to be tested; the driving mechanism (6) comprises a screw (61); one end of the screw rod (61) is in threaded connection with the top plate (12) of the U-shaped frame body, and the bottom end of the screw rod is connected to the center of the first plane pressing plate (3) and used for driving the first plane pressing plate (3) to lift; a hand wheel (65) is arranged at the top of the screw rod (61).
2. The cyclic expansion force testing device for lithium iron phosphate square batteries according to claim 1, wherein: the guide pillar assembly (5) comprises a first guide pillar (51), a second guide pillar (52), a third guide pillar (53) and a fourth guide pillar (54), wherein the first guide pillar (51) and the second guide pillar (52) are arranged at one end of the U-shaped frame body (1), the third guide pillar (53) and the fourth guide pillar (54) are symmetrically arranged at the other end of the U-shaped frame body (1), and the first guide pillar (51), the second guide pillar (52), the third guide pillar (53) and the fourth guide pillar (54) are uniformly distributed around the periphery of the battery groove (2).
3. The cyclic expansion force testing device for lithium iron phosphate square batteries according to claim 2, wherein: the tops of the first guide pillar (51), the second guide pillar (52), the third guide pillar (53) and the fourth guide pillar (54) extend out of the U-shaped frame body top plate (12) and are fixed through bolts, and the other ends of the first guide pillar, the second guide pillar, the third guide pillar and the fourth guide pillar penetrate through the first plane pressing plate (3) and the second plane pressing plate (4) and then reach the U-shaped frame body bottom plate (11) and are fixed on the U-shaped frame body bottom plate (11).
4. The cyclic expansion force testing device for lithium iron phosphate square batteries according to claim 1, wherein: the part of the screw rod (61) extending out of the top plate (12) of the U-shaped frame body is provided with a bearing end (64) for bearing external rotation driving force.
5. The cyclic expansion force testing device for lithium iron phosphate square batteries according to claim 1, wherein: insulating strips are adhered to the surfaces of the U-shaped frame body (1), the battery groove (2) and the second plane pressing plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322005500.1U CN220729512U (en) | 2023-07-28 | 2023-07-28 | Circulating expansion force testing device for lithium iron phosphate square battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322005500.1U CN220729512U (en) | 2023-07-28 | 2023-07-28 | Circulating expansion force testing device for lithium iron phosphate square battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220729512U true CN220729512U (en) | 2024-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322005500.1U Active CN220729512U (en) | 2023-07-28 | 2023-07-28 | Circulating expansion force testing device for lithium iron phosphate square battery |
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| Country | Link |
|---|---|
| CN (1) | CN220729512U (en) |
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2023
- 2023-07-28 CN CN202322005500.1U patent/CN220729512U/en active Active
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