CN211698110U - Battery stress testing device - Google Patents
Battery stress testing device Download PDFInfo
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- CN211698110U CN211698110U CN201922265695.7U CN201922265695U CN211698110U CN 211698110 U CN211698110 U CN 211698110U CN 201922265695 U CN201922265695 U CN 201922265695U CN 211698110 U CN211698110 U CN 211698110U
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- pressure plate
- battery
- displacement sensor
- stress testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model relates to a lithium cell capability test field provides a battery stress test device, include: a mounting frame; the lower pressing plate is installed on the installation frame, and a lower insulation plate is arranged at the top of the lower pressing plate; the upper pressure plate is connected with the mounting frame through a driving mechanism, and an upper insulating plate is arranged at the bottom of the upper pressure plate; the driving mechanism drives the upper pressure plate to move so that the upper insulating plate moves towards or away from the lower insulating plate, the lower pressure plate is provided with a pressure sensor, and the upper insulating plate is provided with a displacement sensor. An object of the utility model is to provide a battery stress test device to at least, the realization can make lithium ion laminate polymer battery carry out normal position stress test under the invariable displacement state, research power is to the influence of battery performance.
Description
Technical Field
The utility model relates to a lithium cell capability test field especially relates to a battery stress test device.
Background
External pressure borne by the lithium ion battery has a significant influence on the charge and discharge performance of the lithium ion battery. The lithium cell has certain volume expansion effect at the charge-discharge in-process, receives module constraint pressure after the battery is in groups, and the battery inflation gives the module certain pressure simultaneously, and the stress environment of studying battery performance optimality has important meaning to battery and module.
The technical scheme disclosed by the Chinese utility model with the publication number of CN 209470684U is a representative scheme of a thickness measuring device in the existing industry. The device comprises a rack, a test platform arranged on the rack, a pressure applying mechanism and a thickness measuring mechanism. The linear power device is composed of a straight stroke cylinder, and an upper fixing plate is provided with a fixing plate sliding guide rod. The device realizes the measurement of the thickness of the battery under the condition of constant pressure.
In fact, the device applies force by the air cylinder, the single measurement pressure is constant, and the battery stress change under the condition of constant displacement cannot be measured in situ; and the upper and lower pressing plates are independently installed, so that the requirement on installation and processing levelness is high, and the flatness of the upper and lower pressing plates is not suitable to be adjusted.
SUMMERY OF THE UTILITY MODEL
For solving the defect that exists among the prior art, the utility model aims to provide a battery stress test device to at least, the realization can make lithium ion laminate polymer battery carry out normal position stress test under invariable displacement state, research power is to the influence of battery performance.
According to the utility model discloses an embodiment provides a battery stress test device, include: a mounting frame; the lower pressing plate is installed on the installation frame, and a lower insulation plate is arranged at the top of the lower pressing plate; the upper pressure plate is connected with the mounting frame through a driving mechanism, and an upper insulating plate is arranged at the bottom of the upper pressure plate; the driving mechanism drives the upper pressure plate to move so that the upper insulating plate moves towards or away from the lower insulating plate, the lower pressure plate is provided with a pressure sensor, and the upper insulating plate is provided with a displacement sensor.
According to the utility model discloses an embodiment, displacement sensor passes through the displacement sensor support mounting and is in go up the side of insulation board, and be provided with on the holding down plate with the displacement sensor locating plate that displacement sensor is relative.
According to the utility model discloses an embodiment, pressure sensor passes through the sensor clamp plate and installs the bottom surface of holding down plate.
According to the utility model discloses an embodiment, actuating mechanism includes the lead screw, lead screw one end is located the outside of installation frame, the other end passes the installation frame and be connected to the top board, wherein, the lead screw is installed through first axle sleeve on the installation frame.
According to the utility model discloses an embodiment, the top board with install the guide pillar between the holding down plate, guide pillar one end is connected to the holding down plate, the other end connect to through the second axle sleeve the top board.
According to the utility model discloses an embodiment, the installation frame includes through slip guide pillar interconnect's entablature and bottom end rail, the holding down plate with the entablature is located the entablature with between the bottom end rail, and the holding down plate is installed through the slip guide pin bushing on the slip guide pillar.
According to the utility model discloses an embodiment, the entablature with the bottom end rail passes through the fastener and installs slide guide pillar both ends.
According to the utility model discloses an embodiment, pressure sensor includes spoke formula pressure sensor or draws formula pressure sensor.
According to the utility model discloses an embodiment, displacement sensor includes contact displacement sensor or grating formula displacement sensor.
According to the utility model discloses an embodiment, go up the insulation board with lower insulation board includes marble insulation board or bakelite insulation board.
The beneficial effects of the utility model reside in that:
the utility model provides an among the battery stress testing arrangement, actuating mechanism can drive the top board and remove to make the top board orientation or deviate from the bottom board and remove, and be provided with pressure sensor simultaneously on the bottom board, be provided with displacement sensor on the top board. Contrast traditional scheme, the utility model discloses combine the characteristics of lithium cell thickness measuring device, exert pressure the location to the top board through actuating mechanism, reach the purpose of constant displacement. Furthermore, the utility model discloses sufficient space is reserved to upper and lower holding down plate, and the insulation board can match the change according to test battery specification, realizes battery test purpose under the normal position charge-discharge state.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an exemplary structural schematic diagram of the battery stress testing device of the present invention.
Reference numerals:
100: a battery stress testing device; 102: a mounting frame; 104: a lower pressing plate; 106: an upper pressure plate; 108: a lower insulating plate; 110: an upper insulating plate; 112: a pressure sensor; 114: a displacement sensor; 116: a displacement sensor support; 118: a displacement sensor positioning plate; 120: a sensor platen; 122: a lead screw; 124: a first bushing; 126: a guide post; 128: a second shaft sleeve; 130: sliding the guide post; 132: an upper cross beam; 134: a lower cross beam; 136: a sliding guide sleeve; 138: a bolt; b: the cell was tested.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. 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 description of the present invention, unless otherwise specified, "plurality", and "plural" mean two or more, and "several", and "several groups" mean one or more.
As shown in fig. 1, an embodiment of the present invention provides a battery stress testing apparatus 100. The battery stress testing apparatus 100 may generally include a mounting frame 102, a lower platen 104, and an upper platen 106. Specifically, the lower pressure plate 104 may be mounted on the mounting frame 102 and may be provided with a lower insulation plate 108 on top; the upper pressure plate 106 may be connected to the mounting frame 102 by a driving mechanism and the bottom may be provided with an upper insulating plate 110. Further, the driving mechanism may drive the upper pressure plate 106 to move so as to move the upper insulation plate 110 toward or away from the lower insulation plate 108, and further, a pressure sensor 112 may be disposed on the lower pressure plate 104, and a displacement sensor 114 may be disposed on the upper insulation plate 110.
Will the utility model discloses the structure that provides above compares with traditional scheme and can discover: contrast traditional scheme, battery normal position stress test under the unable realization constant displacement state of traditional scheme, the utility model discloses combine the characteristics of lithium cell thickness measuring device, carry out the location of exerting pressure to the top board through actuating mechanism, can reach the purpose of constant displacement. In addition, compared with the traditional scheme, the traditional scheme does not consider the in-situ requirements of charging and discharging, and charging and discharging cannot be realized in the test. And the utility model discloses upper and lower clamp plate reservation has enough spaces, and the insulation board can match the change according to the test battery specification, has realized battery test purpose under the normal position charge-discharge state.
As further shown in fig. 1, in an embodiment of the present invention, the displacement sensor 114 may be mounted on a side of the upper insulating plate 110 through a displacement sensor bracket 116, and a displacement sensor positioning plate 118 opposite to the displacement sensor 114 may be disposed on the lower pressure plate 104. The displacement sensor positioning plate 118 is used to position and calibrate the displacement sensor 114, and the process will be described below in connection with the actual operation.
On the other hand, as shown in fig. 1, in an embodiment of the present invention, the pressure sensor 112 may be mounted on the bottom surface of the lower platen 104 by a sensor platen 120. The pressure sensor 112 is used in the present invention for performing a pressure test of the battery, and the process will be described below with reference to the actual operation.
In a particular embodiment, the drive mechanism as described above may include a lead screw 122. Specifically, one end of the lead screw 122 is located outside the mounting frame 102 (outside the top of the mounting frame 102 in the illustrated embodiment), and the other end of the lead screw 122 passes through the mounting frame 102 and is connected to the upper platen 106, wherein the lead screw 122 can be mounted on the mounting frame 102 through a first bushing 124. In one embodiment, the first bushing 124 may be a trapezoidal bushing; accordingly, the lead screw 122 may be a trapezoidal lead screw.
It should be understood, however, that the lead screw 122 is merely one embodiment of the drive mechanism, and that other suitable structures may be used as the drive mechanism, such as a cylinder structure, etc. Also, the specific form of the lead screw 122 and the specific form of the first bushing 124 are also merely illustrative. In other words, the various structures described above do not constitute any particular limitation to the present invention.
Referring further to fig. 1, in one embodiment of the present invention, guide posts 126 may be mounted between the upper platen 106 and the lower platen 104, such as preferably high precision guide posts to ensure parallelism between the upper and lower platens and the upper and lower insulating plates. Specifically, one end of the guide post 126 may be connected to the lower platen 104, while the other end of the guide post 126 may be connected to the upper platen 106 through the second bushing 128. In one embodiment, the second bushing 128 may be a ball bushing; it should be understood, however, that the second sleeve 128 is merely exemplary and is not intended to limit the present invention in any particular manner, and that the type of the second sleeve 128 may be selected as appropriate for the particular situation.
With respect to the mounting frame 102, in one embodiment, as shown in fig. 1, the mounting frame 102 can include an upper cross beam 132 and a lower cross beam 134 that are interconnected by a sliding guide post 130. Specifically, the lower platen 104 and the upper platen 106 may be positioned between the upper beam 132 and the lower beam 134 to form the structure shown in FIG. 1, and the lower platen 104 may be mounted on the slide guide post 130 by the slide guide sleeve 136. In an alternative embodiment, the upper cross member 132 and the lower cross member 134 may be mounted to both ends of the slide guide column 130 by fasteners. In an embodiment, for example, the fastener may be a bolt 138; it should be understood that the connection between the upper cross beam 132 and the lower cross beam 134 and the sliding guide column 130 can also be other suitable connection methods, and the bolt connection is only an embodiment of the present invention and does not constitute any particular limitation to the present invention. In a specific embodiment, the upper cross beam 132 and the lower cross beam 134 are connected to form the sliding guide post 130, and the lower press plate 104 and the sliding guide post 130 are guided by a linear bearing, so that the influence of friction on the pressure sensor is reduced.
In alternative embodiments, the pressure sensor 112 may comprise a spoke-type pressure sensor or a pull-type pressure sensor, and the span of the pressure sensor 112 may be in the range of 100kg to 10000 kg. In addition, the displacement sensor 114 may include a contact type displacement sensor or a grating type displacement sensor, and the measuring range of the displacement sensor 114 may be in the range of 0 to 50 mm. The displacement sensor can be selected according to the test precision requirement. The testing precision is required to be within 1um, and a contact type sensor is preferably selected; above 1um, a grating sensor is preferred. Further, the upper insulating plate 110 and the lower insulating plate 108 may include a marble insulating plate or an electric wood insulating plate, thereby ensuring that the battery does not have a risk of short circuit or the like during a battery test process.
It should be understood herein that the type of the pressure sensor 112, the type of the displacement sensor 114, and the types of the upper and lower insulating plates 110 and 108 may be selected according to actual circumstances. That is, the above description is only an exemplary embodiment of the present invention, and does not constitute any particular limitation to the present invention.
In addition, in an alternative embodiment, the thickness of the upper and lower insulating plates 110 and 108 may be in the range of 5 to 50mm, and the upper and lower insulating plates 110 and 108 may be replaced as needed. The thickness is selected based on the maximum pressure tested and the cell size. The upper insulating plate 110 and the lower insulating plate 108 can be replaced according to the specification of the battery.
Similarly to the above, the upper cross member 132, the lower cross member 134, the upper press plate 106, and the lower press plate 104 may be made of steel plates because the steel plates have sufficient rigidity. The upper cross beam 132, the lower cross beam 134, the upper pressure plate 106 and the lower pressure plate 104 are main stress components, and the thickness of steel plates of the upper cross beam, the lower cross beam, the upper pressure plate 106 and the lower pressure plate 104 can be within the range of 5-50 mm. In a specific embodiment, the upper cross beam 132 and the lower cross beam 134 are preferably plated with nickel on steel plates, so as to achieve the purposes of beauty and corrosion resistance; the upper pressing plate 106 and the lower pressing plate 104 are preferably subjected to chrome plating treatment of steel plates, so that the purposes of bright and attractive appearance, hardness increase and wear resistance are achieved. In addition, the selection of the thickness of the steel plate is determined according to the maximum test pressure and the size of the battery, and the rigidity of the steel plate is ensured to meet the test requirements.
The utility model discloses an in-service use in-process, the pretightning force produces through actuating mechanism (for example lead screw 122) rotation down, progressively adds supreme, lower clamp plate, upper and lower insulation board and battery through the pretightning force by little to big, reduces the impact to the battery and guarantees accuracy and the stability of survey pretightning force.
Particularly, the embodiment of the present invention provides a method for using a battery stress testing apparatus 100, which comprises:
the upper insulating plate 110 and the lower insulating plate 108 are confirmed to be suitable for the specification of the test battery, and the upper insulating plate 110 is brought into close contact with the lower insulating plate 108 by rotating the screw 122 to zero the displacement sensor 114. Then, the upper insulating plate 110 and the lower insulating plate 108 are separated to a distance capable of accommodating the test cell B.
Next, a lithium ion pouch battery as a test battery B was placed on the lower insulating plate 108 while causing the battery tabs to protrude out of the lower insulating plate 108.
Then, the upper insulating plate 110 and the lower insulating plate 108 are brought into close contact with the battery by rotating the lead screw 122, the display values of the displacement sensor 114 and the pressure sensor 112 are observed, and when the experimentally required displacement or pressure is reached, the rotation of the lead screw 122 is stopped.
And then, connecting the positive electrode and the negative electrode of the external charging and discharging equipment clamp with the positive electrode and the negative electrode of the battery respectively, and starting the charging and discharging equipment for testing.
Finally, the displacement sensor 114 and the pressure sensor 112 are connected with a computer, and displacement and pressure data are acquired through corresponding acquisition software.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A battery stress testing apparatus, comprising:
a mounting frame;
the lower pressing plate is installed on the installation frame, and a lower insulation plate is arranged at the top of the lower pressing plate;
the upper pressure plate is connected with the mounting frame through a driving mechanism, and an upper insulating plate is arranged at the bottom of the upper pressure plate;
the driving mechanism drives the upper pressure plate to move so that the upper insulating plate moves towards or away from the lower insulating plate, the lower pressure plate is provided with a pressure sensor, and the upper insulating plate is provided with a displacement sensor.
2. The battery stress testing device according to claim 1, wherein the displacement sensor is mounted on a side surface of the upper insulating plate through a displacement sensor bracket, and a displacement sensor positioning plate is provided on the lower pressure plate to be opposite to the displacement sensor.
3. The battery stress testing apparatus of claim 1, wherein the pressure sensor is mounted to a bottom surface of the lower pressure plate by a sensor pressure plate.
4. The battery stress testing apparatus of any one of claims 1 to 3, wherein the driving mechanism comprises a lead screw, one end of the lead screw is located outside the mounting frame, and the other end of the lead screw passes through the mounting frame and is connected to the upper pressure plate, wherein the lead screw is mounted on the mounting frame through a first bushing.
5. The battery stress testing apparatus according to any one of claims 1 to 3, wherein a guide post is installed between the upper pressure plate and the lower pressure plate, one end of the guide post is connected to the lower pressure plate, and the other end is connected to the upper pressure plate through a second bushing.
6. The battery stress testing device of any one of claims 1 to 3, wherein the mounting frame comprises an upper cross beam and a lower cross beam interconnected by a sliding guide post, the lower pressure plate and the upper pressure plate are located between the upper cross beam and the lower cross beam, and the lower pressure plate is mounted on the sliding guide post by a sliding guide sleeve.
7. The battery stress testing apparatus of claim 6, wherein the upper cross beam and the lower cross beam are mounted at both ends of the sliding guide pillar by fasteners.
8. The battery stress testing apparatus of any of claims 1 to 3, wherein the pressure sensor comprises a spoke-type pressure sensor or a pull-type pressure sensor.
9. Battery stress testing device according to any of the claims 1 to 3, wherein the displacement sensor comprises a contact displacement sensor or a grating displacement sensor.
10. The battery stress testing device of any one of claims 1 to 3, wherein the upper and lower insulating plates comprise marble insulating plates or bakelite insulating plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922265695.7U CN211698110U (en) | 2019-12-16 | 2019-12-16 | Battery stress testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922265695.7U CN211698110U (en) | 2019-12-16 | 2019-12-16 | Battery stress testing device |
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| Publication Number | Publication Date |
|---|---|
| CN211698110U true CN211698110U (en) | 2020-10-16 |
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| CN201922265695.7U Active CN211698110U (en) | 2019-12-16 | 2019-12-16 | Battery stress testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432556A (en) * | 2021-05-26 | 2021-09-24 | 北京氢沄新能源科技有限公司 | Fuel cell assembly testing device |
| CN114509197A (en) * | 2022-02-17 | 2022-05-17 | 中国科学技术大学 | Stress change in-situ testing device for soft package battery |
-
2019
- 2019-12-16 CN CN201922265695.7U patent/CN211698110U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432556A (en) * | 2021-05-26 | 2021-09-24 | 北京氢沄新能源科技有限公司 | Fuel cell assembly testing device |
| CN114509197A (en) * | 2022-02-17 | 2022-05-17 | 中国科学技术大学 | Stress change in-situ testing device for soft package battery |
| CN114509197B (en) * | 2022-02-17 | 2022-09-30 | 中国科学技术大学 | Stress change in-situ testing device for soft package battery |
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