CN113820235A - Battery hardness detection device and method - Google Patents
Battery hardness detection device and method Download PDFInfo
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- CN113820235A CN113820235A CN202110939408.5A CN202110939408A CN113820235A CN 113820235 A CN113820235 A CN 113820235A CN 202110939408 A CN202110939408 A CN 202110939408A CN 113820235 A CN113820235 A CN 113820235A
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- 238000001514 detection method Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 66
- 238000006073 displacement reaction Methods 0.000 claims abstract description 55
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000012360 testing method Methods 0.000 claims description 21
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 239000002131 composite material Substances 0.000 abstract description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 13
- 229910001416 lithium ion Inorganic materials 0.000 description 13
- 238000013329 compounding Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/52—Investigating hardness or rebound hardness by measuring extent of rebound of a striking body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
Abstract
The invention discloses a battery hardness detection device and method. The device includes: the casing is provided with two opposite side walls in the length direction; the tops of the inner sides of the two side walls are respectively provided with a stop lever extending along the length direction of the machine shell at the same height; two ends of each stop lever are respectively connected with the corresponding side wall through a telescopic mechanism; a plurality of hardness detection mechanisms are arranged between the two stop levers at intervals along the length direction of the machine shell, and each hardness detection mechanism comprises a transverse support lever, a longitudinal support lever and a bouncing ball, wherein two ends of the transverse support lever are respectively erected on the two stop levers, and the bouncing balls are arranged at the bottom ends of the longitudinal support levers; the casing is provided with a stop lever control mechanism for controlling the two stop levers to simultaneously move back and forth on the telescopic mechanism so that the hardness detection mechanisms can simultaneously fall off from the two stop levers; the top of casing is equipped with the slide rail, is equipped with a plurality of displacement detection sensor on the slide rail, and every displacement sensor all is connected with processing module. The hardness and the thermal composite effect of the battery can be comprehensively, conveniently and accurately detected.
Description
Technical Field
The invention relates to the field of hardness detection, in particular to a battery hardness detection device and method.
Background
The lithium ion battery is the most popular new energy storage device at present, and can be divided into a soft package lithium ion battery and a metal shell lithium ion battery according to different packaging modes of the lithium ion battery, wherein the soft package lithium ion battery uses an aluminum plastic film as a packaging material. Along with the trend that the size of the battery is longer and narrower, the lithium ion battery with the flexible package is more and more unfavorable for subsequent grouping assembly, and the battery is easy to fall and collide to cause safety accidents in the process of grabbing and translating the battery by a manipulator, so that the hardness of the battery needs to be improved by a special process. The positive and negative pole pieces and the diaphragm are adhered together under the conditions of high temperature and high pressure by using the diaphragm with the adhesive in the thermal compounding process, so that the core package is integrated, and the hardness of the battery can be effectively improved. On the other hand, the interface and the cycle performance of the battery can be effectively improved through the thermal compounding process. However, due to the fact that the thickness of the battery is inconsistent or the temperature and pressure of the equipment are poor in consistency, the compounding effect of each area of the battery is inconsistent, and occasionally, the battery is locally soft, and the diaphragm and the pole piece are not effectively compounded.
Therefore, the hardness test of the soft package lithium ion battery after thermal compounding is particularly necessary, but no equipment can meet the requirement of measuring the hardness of the soft package lithium ion battery at present.
The method commonly adopted in the prior art is that staff judge the hardness of the battery by pressing or knocking the surface of the battery with hands, and judge the thermal recombination effect by disassembling the battery. The methods are all based on experience or feeling, the results are unreliable, and the obtained conclusions are different due to different operation methods of each person, so that the accuracy of judgment is influenced.
Disclosure of Invention
The invention aims to provide a battery hardness detection device and a battery hardness detection method, which can be used for comprehensively, conveniently and accurately detecting the hardness and the thermal composite effect of a soft package lithium ion battery.
In order to achieve the above object, a first aspect of the present invention provides a battery hardness detecting device, including: the bottom of the machine shell is open, and two opposite side walls are arranged on the machine shell in the length direction;
the tops of the inner sides of the two side walls are respectively provided with a stop lever extending along the length direction of the machine shell at the same height;
two ends of each stop lever are respectively connected with the corresponding side wall through a telescopic mechanism;
a plurality of hardness detection mechanisms are arranged between the two stop levers at intervals along the length direction of the machine shell;
the hardness detection mechanism comprises a transverse supporting rod, a longitudinal supporting rod and a bouncing ball, wherein two ends of the transverse supporting rod are respectively erected on the two stop rods, the top end of the longitudinal supporting rod is connected with the middle of the transverse supporting rod, and the bouncing ball is arranged at the bottom end of the longitudinal supporting rod;
the casing is provided with a stop lever control mechanism, and the stop lever control mechanism is used for controlling the two stop levers to simultaneously move back and forth on the telescopic mechanism so as to enable the hardness detection mechanisms to simultaneously fall off from the two stop levers;
the top end of the shell is provided with a sliding rail extending along the length direction of the shell, the sliding rail is provided with a plurality of displacement detection sensors which are in one-to-one correspondence with the hardness detection mechanisms, and the displacement sensors are connected with the sliding rail in a sliding manner;
each displacement sensor is connected with a processing module, each displacement detection sensor is used for detecting the rebound height of the corresponding bouncing ball after the bouncing ball falls on the surface of the battery, and the processing module is used for reading the displacement data detected by each displacement sensor and calculating the hardness corresponding to different test points of the battery.
In a second aspect, the present invention further provides a battery hardness detection method based on the battery hardness detection apparatus of the first aspect, including:
placing the battery on a flat table top;
placing the battery hardness detection device on the surface of the battery, and adjusting the plurality of hardness detection mechanisms and the plurality of displacement sensors to preset positions;
the two stop rods are controlled by the stop rod control mechanism to simultaneously move back and forth on the telescopic mechanism, so that the hardness detection mechanisms simultaneously fall off from the two stop rods;
detecting the rebound height of each bouncing ball after falling on the surface of a battery through a plurality of displacement detection sensors respectively;
and reading the displacement data detected by each displacement sensor through the processing module and calculating the hardness of different test points of the battery.
The invention has the beneficial effects that:
the invention controls the two stop levers to simultaneously move back and forth on the telescopic mechanism through the stop lever control mechanism, so that a plurality of hardness detection mechanisms simultaneously fall off from the two stop levers, and the bounce height of each bouncing ball after falling on the surface of the battery is respectively detected by a plurality of displacement detection sensors, the device can realize hardness detection only by operating the stop lever control mechanism for one action, is simple and convenient to operate, adopts the displacement sensors to collect bounce height data of the bouncing ball, has sensitive response and reliable result, adopts the bouncing ball to cause no damage to the battery, can quickly and accurately judge the thermal composite effect of the soft package lithium ion battery, and avoids artificial loss and errors caused by judging the hardness and the thermal composite effect of the battery by manually pinching, knocking and disassembling the battery at present; simultaneously, can set up a plurality of displacement sensor and a plurality of hardness detection mechanism, can test the hardness of a plurality of different positions of battery simultaneously to because a plurality of displacement sensor and a plurality of hardness detection mechanism all can remove, can adapt to the battery detection demand of not unidimensional.
The apparatus of the present invention has other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts.
Fig. 1 shows a side view of a battery hardness detection apparatus according to an embodiment of the present invention.
Fig. 2 shows a top view of a battery hardness detection apparatus according to an embodiment of the present invention.
FIG. 3 is a schematic diagram illustrating a telescoping mechanism in a battery hardness testing apparatus according to an embodiment of the invention
Detailed Description
In the existing battery hardness detection scheme, certain pressure is applied to a battery suspended in the middle of a cushion block, and the bending deformation of the battery is judged by using a laser correlation sensor to indirectly obtain the hardness of the battery. The method is simple to operate, but the pressure head has certain destructiveness to the battery, and for the battery which is hard after thermal compounding, the stripping of the diaphragm and the pole piece is very easy to cause during deformation, even the stripping and material dropping of the pole piece coating are caused, and the battery performance is influenced. The other existing scheme designs a tool similar to a rubber hammer to test the hardness of the battery, and the hardness of the battery is obtained by testing the rebound force of a rubber pad of a hammer head after the surface of the battery is knocked.
The invention discloses a lithium ion battery hardness detection device which is simple and easy to operate. The method solves the problems that the existing testing method has large damage to the battery or the testing result is not accurate enough.
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Fig. 1 and 2 show a side view and a top view, respectively, of a battery hardness detection apparatus according to an embodiment of the present invention.
As shown in fig. 1 and 2, a battery hardness detection apparatus includes: the bottom of the machine shell 7 is open, and two opposite side walls are arranged on the machine shell 7 in the length direction;
the tops of the inner sides of the two side walls are respectively provided with a stop lever 12 extending along the length direction of the machine shell 7 at the same height;
two ends of each stop lever 12 are respectively connected with the corresponding side wall through a telescopic mechanism;
a plurality of hardness detection mechanisms are arranged between the two stop levers 12 at intervals along the length direction of the machine shell 7;
the hardness detection mechanism comprises a transverse supporting rod 3, a longitudinal supporting rod 5 and a bouncing ball 8, wherein two ends of the transverse supporting rod 3 are respectively erected on two stop levers 12, the top end of the longitudinal supporting rod 5 is connected with the middle of the transverse supporting rod 3, and the bouncing ball 8 is arranged at the bottom end of the longitudinal supporting rod 5;
the machine shell 7 is provided with a stop lever control mechanism 4, the stop lever control mechanism 4 is used for controlling the two stop levers 12 to simultaneously move back and forth on the telescopic mechanism so as to enable the hardness detection mechanisms to simultaneously fall off from the two stop levers 12, and after falling off, the bouncing ball 8 drives the transverse support rod 3 and the longitudinal support rod 5 to do free-fall movement together;
the top end of the machine shell 7 is provided with a sliding rail 1 extending along the length direction of the machine shell 7, the sliding rail 1 is provided with a plurality of displacement detection sensors which are in one-to-one correspondence with the hardness detection mechanisms, and the displacement sensors 2 are connected with the sliding rail 1 in a sliding manner and can move on the sliding rail 1 at will;
each displacement sensor 2 is connected with the processing module 6, each displacement detection sensor is used for detecting the rebound height of the corresponding bouncing ball 8 after falling on the surface of the battery, and the processing module 6 is used for reading the displacement data detected by each displacement sensor 2 and calculating the hardness corresponding to different testing points of the battery.
The number of the hardness detection mechanisms can be specifically selected according to the size of the battery and the number of the test areas, in the embodiment, the hardness detection mechanisms and the displacement sensors 2 are preferably three, the three hardness detection mechanisms respectively test the hardness of two ends and the hardness of the middle area of one battery, the hardness detection mechanisms can move freely on the two stop levers 12, and the distance between the hardness detection mechanisms is adjustable. The battery in this embodiment is a soft package lithium ion battery, and may also be other soft package batteries.
The transverse support rods 3 and the longitudinal support rods 5 are preferably made of polycarbonate plastics, polyolefin plastics or other light plastics, and the bounce balls 8 are preferably made of rubber, so that the surface of the battery cannot be damaged. The transverse supporting rod 3 is fixedly connected with the longitudinal supporting rod 5, and the bouncing ball 8 is fixedly connected with the bottom end of the longitudinal supporting rod 5. The transverse strut 3 and the longitudinal strut 5 can be integrally formed or can be designed in a split mode. It should be noted that the length of the transverse strut 3 should be smaller than the width of the inner cavity of the housing 7, that is, smaller than the distance between the two side walls, and the distance between the two cross bars in the normal state should be slightly smaller than the length of the transverse strut 3, and the maximum distance between the two cross bars after moving away from each other should be larger than the length of the transverse strut 3.
Wherein, the detectable range of the displacement sensor 2 is 5-10 cm. The displacement sensor 2 may be an existing ultrasonic displacement sensor 2, a laser displacement sensor 2, a resistance displacement sensor 2, or the like, and the present embodiment is preferably an ultrasonic displacement sensor 2, where the ultrasonic displacement sensor 2 includes an ultrasonic generator and a receiver, an ultrasonic wave emitted by the ultrasonic generator is reflected by the bouncing ball 8 and then received by the ultrasonic receiver, and the change of the displacement is calculated by recording the ultrasonic emission time and the reflected wave receiving time, so as to obtain the bouncing height of the bouncing ball 8. The bouncing heights of the bouncing balls 8 falling on the surfaces of the batteries with different hardness are different, and whether the composite effect inside the battery meets the requirement can be obtained by testing the hardness at different parts of the battery.
As shown in fig. 3, in the present embodiment, the telescopic mechanism includes a guide post 11, a spring 9, and a stop collar 10; one end and the lateral wall fixed connection of guide post 11, and the axial perpendicular to lateral wall surface of guide post 11, spacing ring 10 set up in the other end of guide post 11, and pin 12 slides and wears to locate on guide post 11, and the cover of spring 9 is established on guide post 11, and the both ends of spring 9 respectively with pin 12 and lateral wall fixed connection. In the normal state, the stop lever 12 is extended toward the inside of the housing 7 by the spring 9.
In this embodiment, pin control mechanism 4 is including setting up in the step-up and step-down board of casing 7 terminal surface, and the step-up and step-down board is trapezoidal narrow down wide, and the terminal surface of casing 7 is equipped with the guide rail along vertical direction, and one side and the guide rail sliding connection of step-up and step-down board, the hypotenuse of step-up and step-down board both sides respectively with the inboard sliding contact of two pin 12.
Specifically, pin control mechanism 4 can set up the one end at casing 7, also can adopt two pin control mechanism 4, set up the both ends at casing 7 respectively, through pushing down pin control mechanism 4 when detecting battery hardness, because wide narrow down on pin control mechanism 4, two pins 12 can be pushed away the back-to-back that pushes away simultaneously, distance grow between two pins 12, when the interval of two pins 12 is greater than the length of transverse strut 3, the free fall motion is made in the ball 8 area of hitting of bullet with longitudinal strut 5 and transverse strut 3 whereabouts simultaneously, the ball 8 of hitting of bullet falls to bounce behind the battery surface, what bounce can highly be detected by displacement sensor 2.
In this embodiment, the processing module 6 includes a processor and a display screen.
Specifically, the processing module 6 may be connected to the plurality of displacement sensors 2 by a cable, and a processor in the processing module 6 reads and processes data collected by the displacement sensors 2, and then displays the data. The processing module 6 can simultaneously process and display the bouncing heights of the plurality of bouncing balls 8 and the hardness of different test points of the battery, wherein the method for calculating the corresponding hardness according to the heights of the bouncing balls 8 is the prior art, the resilience of the battery to the bouncing balls 8 can be calculated according to the size, the quality, the contact area and the bouncing heights of the bouncing balls 8, the corresponding hardness can be converted, a relation comparison table of the bouncing height and the hardness of the bouncing balls 8 can be manufactured in advance through experimental tests, the corresponding hardness range can be directly matched according to the bouncing height of the bouncing balls 8, and the calculation process is simplified. This is easily accomplished by those skilled in the art and will not be described further herein.
The embodiment of the invention also provides a battery hardness detection method based on the battery hardness detection device, which comprises the following steps:
placing the battery on a flat table top;
placing a battery hardness detection device on the surface of a battery, and adjusting a plurality of hardness detection mechanisms and a plurality of displacement sensors 2 to preset positions;
the two stop rods 12 are controlled by the stop rod control mechanism 4 to move back and forth on the telescopic mechanism at the same time, so that the hardness detection mechanisms fall off from the two stop rods 12 at the same time;
the rebound height of each bouncing ball 8 after falling on the surface of the battery is respectively detected through a plurality of displacement detection sensors;
and reading the displacement data detected by each displacement sensor 2 through the processing module 6 and calculating the hardness of different test points of the battery.
Specifically, when the device is used, the battery is firstly placed on a flat desktop, then the whole device is placed on the surface of the battery, after the positions of three testing devices and three displacement sensors 2 are confirmed, the stop lever control mechanism 4 is pressed downwards, the stop lever 12 is compressed together with the spring 9 to move outwards due to the fact that the stop lever control mechanism is wide at the top and narrow at the bottom, the bouncing ball 8 with certain weight is bounced to the surface of the battery in a free falling mode with the longitudinal supporting rod 5 and the transverse supporting rod 3, the displacement sensors 2 detect the rebounding height of the bouncing ball 8 and transmit signals to the processing module 6, and the rebounding height of the bouncing ball 8 is output and displayed by the processing module 6. After the primary test is finished, the stop lever 12 is moved outwards by manually adjusting the stop lever control mechanism 4, the hardness detection mechanism is manually arranged on the upper side of the machine shell 7, then the stop lever 12 is controlled to extend inwards, and the transverse supporting rod 3 is reset to the test original position. The bouncing heights of the bouncing balls 8 falling on the surfaces of the batteries with different hardness are different, and whether the composite effect inside the battery meets the requirement can be obtained by testing the hardness at different parts of the battery.
The device disclosed by the invention is simple in structure, convenient to operate and free of damage to the battery, can well realize the aim of rapidly detecting the hardness and the thermal compounding effect of the lithium ion battery, and avoids the human error of judging the hardness and the thermal compounding effect of the battery by manually pinching, beating and disassembling the battery at present.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A battery hardness detecting device, characterized by comprising: the bottom of the machine shell is open, and two opposite side walls are arranged on the machine shell in the length direction;
the tops of the inner sides of the two side walls are respectively provided with a stop lever extending along the length direction of the machine shell at the same height;
two ends of each stop lever are respectively connected with the corresponding side wall through a telescopic mechanism;
a plurality of hardness detection mechanisms are arranged between the two stop levers at intervals along the length direction of the machine shell;
the hardness detection mechanism comprises a transverse supporting rod, a longitudinal supporting rod and a bouncing ball, wherein two ends of the transverse supporting rod are respectively erected on the two stop rods, the top end of the longitudinal supporting rod is connected with the middle of the transverse supporting rod, and the bouncing ball is arranged at the bottom end of the longitudinal supporting rod;
the casing is provided with a stop lever control mechanism, and the stop lever control mechanism is used for controlling the two stop levers to simultaneously move back and forth on the telescopic mechanism so as to enable the hardness detection mechanisms to simultaneously fall off from the two stop levers;
the top end of the shell is provided with a sliding rail extending along the length direction of the shell, the sliding rail is provided with a plurality of displacement detection sensors which are in one-to-one correspondence with the hardness detection mechanisms, and the displacement sensors are connected with the sliding rail in a sliding manner;
each displacement sensor is connected with a processing module, each displacement detection sensor is used for detecting the rebound height of the corresponding bouncing ball after the bouncing ball falls on the surface of the battery, and the processing module is used for reading the displacement data detected by each displacement sensor and calculating the hardness corresponding to different test points of the battery.
2. The battery hardness detection device according to claim 1, wherein the transverse support rod and the longitudinal support rod are made of polycarbonate plastics or polyolefin plastics.
3. The battery hardness detection device according to claim 2, wherein the transverse strut and the longitudinal strut are fixedly connected, and the transverse strut and the longitudinal strut are integrally formed or separately designed.
4. The battery hardness detection device according to claim 1, wherein the bouncing ball is made of rubber, and the bouncing ball is fixedly connected with the bottom end of the longitudinal support rod.
5. The battery hardness detecting device according to claim 1, wherein the displacement sensor has a measurement range of 5-10 cm.
6. The battery hardness detection device according to claim 1 or 5, wherein the displacement sensor is an ultrasonic displacement sensor, a laser displacement sensor, or a resistance displacement sensor.
7. The battery hardness detection device according to claim 1, wherein the telescoping mechanism comprises a guide post, a spring and a stop collar;
the one end of guide post with lateral wall fixed connection, just the axial perpendicular to of guide post the lateral wall surface, the spacing ring set up in the other end of guide post, the pin slides and wears to locate on the guide post, the spring housing is established on the guide post, the both ends of spring respectively with the pin with lateral wall fixed connection.
8. The battery hardness detection device according to claim 1, wherein the stop lever control mechanism includes a lifting/lowering plate disposed on the end surface of the housing, the lifting/lowering plate is in a trapezoidal shape with a wide top and a narrow bottom, the end surface of the housing is provided with a guide rail in a vertical direction, one side of the lifting/lowering plate is slidably connected to the guide rail, and oblique edges of two sides of the lifting/lowering plate are respectively in sliding contact with inner sides of the two stop levers.
9. The battery hardness detection device according to claim 1, wherein the processing module comprises a processor and a display screen.
10. A battery hardness detection method based on the battery hardness detection device according to claim 1, characterized by comprising:
placing the battery on a flat table top;
placing the battery hardness detection device on the surface of the battery, and adjusting the plurality of hardness detection mechanisms and the plurality of displacement sensors to preset positions;
the two stop rods are controlled by the stop rod control mechanism to simultaneously move back and forth on the telescopic mechanism, so that the hardness detection mechanisms simultaneously fall off from the two stop rods;
detecting the rebound height of each bouncing ball after falling on the surface of a battery through a plurality of displacement detection sensors respectively;
and reading the displacement data detected by each displacement sensor through the processing module and calculating the hardness of different test points of the battery.
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| CN202110939408.5A CN113820235A (en) | 2021-08-16 | 2021-08-16 | Battery hardness detection device and method |
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| CN202110939408.5A CN113820235A (en) | 2021-08-16 | 2021-08-16 | Battery hardness detection device and method |
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| CN212540013U (en) * | 2020-05-12 | 2021-02-12 | 史莹莹 | Vehicle shell hardness detection device |
| TWM609448U (en) * | 2020-11-06 | 2021-03-21 | 致茂電子股份有限公司 | Pouch cell battery hardness detection device |
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