CN209991940U - Battery pole piece thickness variation measuring device and system - Google Patents
Battery pole piece thickness variation measuring device and system Download PDFInfo
- Publication number
- CN209991940U CN209991940U CN201920973729.5U CN201920973729U CN209991940U CN 209991940 U CN209991940 U CN 209991940U CN 201920973729 U CN201920973729 U CN 201920973729U CN 209991940 U CN209991940 U CN 209991940U
- Authority
- CN
- China
- Prior art keywords
- battery
- pole piece
- thickness variation
- measuring device
- positioning groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Secondary Cells (AREA)
Abstract
The utility model discloses a battery pole piece thickness variation measuring device and system, which comprises a shell, a movable plug, an elastic piece and a displacement sensor, wherein a battery accommodating part for accommodating a battery to be measured is arranged in the shell; the movable plug is arranged in the shell and can move along the thickness direction of the battery in the battery accommodating part; the elastic piece is used for providing elastic force for the movable plug to be attached to the positive plate or the negative plate of the battery in the battery accommodating part; the displacement sensor is used for detecting the displacement of the movable plug in the thickness direction of the battery. In the utility model, the elastic part provides the elastic force which is attached to the pole piece of the battery for the movable plug, when the thickness of the pole piece of the battery changes under the conditions of charging and discharging, the battery can push the movable plug to move, and the displacement sensor detects the displacement of the movable plug in the thickness direction of the battery in real time, thereby obtaining the change data of the thickness of the battery pole piece; and the battery pole piece thickness variation measuring device can be repeatedly used, is economical and economical, and ensures good repeatability of test data.
Description
Technical Field
The utility model relates to a battery test technical field especially relates to a battery pole piece thickness variation measuring device and system.
Background
At present, in some batteries, the electrode material of the battery undergoes volume change in the charging and discharging processes, and the change has important influence on the electrical property and the safety performance of the whole battery. For example, in the currently commercialized lithium ion battery, the positive electrode material mainly includes lithium cobaltate, lithium iron phosphate, ternary material, and the like, and the negative electrode material mainly includes graphite, silicon-based material, and the like. Wherein, the volume change of the cathode material is much larger than that of the anode material. Therefore, the measurement of the expansion-contraction effect of the pole piece of the battery in the charging and discharging process has guiding significance for the research and development of electrode materials.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can measure battery sheet thickness change measuring device of battery sheet at the change of charge-discharge in-process thickness.
To achieve the purpose, on one hand, the utility model adopts the following technical scheme:
a battery pole piece thickness variation measurement apparatus, comprising:
a case in which a battery receiving part for receiving a battery to be tested is provided;
a movable stopper provided in the case and movable in a thickness direction of the battery in the battery housing part;
an elastic member for providing the movable stopper with an elastic force that is in contact with the positive electrode tab or the negative electrode tab of the battery in the battery housing portion;
a displacement sensor for detecting displacement of the movable stopper.
In one embodiment, the housing includes a lower housing and an upper housing that are oppositely disposed and removably connected.
In one embodiment, the battery receiving part is located on the lower case; the lower end of the movable plug is opposite to the battery accommodating part, and the upper end of the movable plug is movably arranged in a first through hole formed in the upper shell in a penetrating manner; the displacement sensor is arranged right above the first through hole.
In one embodiment, the housing further comprises a mounting block, the mounting block being removably mounted to the upper housing; the displacement sensor is arranged in the second through hole in the mounting block in a penetrating mode; a transparent part positioned between the upper end of the movable plug and the displacement sensor is arranged between the mounting block and the upper shell; a first sealing ring is arranged between the transparent piece and the upper shell.
In a specific embodiment, the upper case includes a main body and a boss portion provided on the main body, and the first through hole penetrates through the main body and the boss portion; the mounting block is in threaded connection with the boss.
In a specific embodiment, the battery further comprises a charging and discharging device located outside the housing, the upper housing, the lower housing and the movable plug are all made of a conductive material, the upper housing and the lower housing are in insulation connection, and the charging and discharging device can be electrically connected with one of a positive plate and a negative plate of the battery through the upper housing and the movable plug and can be electrically connected with the other of the positive plate and the negative plate of the battery through the lower housing.
In one embodiment, the battery receiving portion includes a first positioning groove formed in the lower case and a second positioning groove formed in a groove bottom of the first positioning groove, the second positioning groove being configured to receive one of the positive electrode tab and the negative electrode tab of the battery, and the groove bottom of the first positioning groove being configured to receive the separator of the battery and the other of the positive electrode tab and the negative electrode tab of the battery; the inner diameter of the second positioning groove is equal to or larger than the diameter of the positive electrode plate or the negative electrode plate contained in the second positioning groove, and the diameter of the bottom of the first positioning groove is equal to or larger than the diameter of the diaphragm.
In a specific embodiment, an insulating positioning ring is further arranged at the bottom of the first positioning groove and is used for accommodating the positive plate or the negative plate in the first positioning groove; the inner diameter of the positioning ring is equal to or larger than the diameter of the positive plate or the negative plate contained in the positioning ring.
In one embodiment, a second seal ring is disposed between the lower housing and the upper housing.
On the other hand, the utility model adopts the following technical scheme:
a battery pole piece thickness variation measurement system, comprising:
the battery pole piece thickness variation measuring device according to any one of the above items; and
the battery, it set up in on battery holding portion of battery sheet thickness variation measuring device and its positive plate, diaphragm and the negative pole piece including setting gradually, the diaphragm with the positive plate with all be provided with electrolyte between the negative pole piece, the negative pole piece perhaps the positive plate with the activity stopper contact.
The utility model has the advantages as follows:
the utility model provides a battery pole piece thickness variation measuring device and battery pole piece thickness variation measuring system, the elastic component provides the elasticity with the pole piece laminating of battery for the movable stopper, when the thickness of the pole piece of battery changes under the conditions such as charge-discharge, the battery can promote the movable stopper to remove, displacement sensor detects the displacement that the movable stopper takes place along with the thickness direction at the battery, thereby obtain the thickness variation data of two pole pieces of battery under the charge-discharge condition in real time, can measure the thickness variation value of another pole piece through adopting the known pole piece of a thickness variation; moreover, the device for measuring the thickness change of the battery pole piece, which is provided by the specific embodiment, can be repeatedly used, is economical and economical, and ensures good repeatability of test data.
Drawings
Fig. 1 is a schematic structural diagram of a system for measuring thickness variation of a battery pole piece according to an embodiment of the present invention;
fig. 2 is an internal schematic view of a device for measuring thickness variation of a battery pole piece according to an embodiment of the present invention.
Reference numerals:
100. a battery pole piece thickness variation measuring device; 200. a battery; 300. an intelligent terminal;
110. a housing; 120. a movable plug; 130. an elastic member; 140. a displacement sensor; 150. a wire; 160. a transparent member; 170. a first seal ring; 180. a charging and discharging device;
111. a lower housing; 112. an upper housing; 113. mounting blocks; 114. a bolt; 115. a nut; 116. a second seal ring;
121. an abutting portion; 122. a rod portion;
141. a controller;
1111. a first positioning groove; 1112. positioning rings;
1121. a first through hole; 1122. a main body; 1123. a boss portion;
1131. a second through hole; 1132. a first mounting portion; 1133. a second mounting portion.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
The present embodiment provides a battery pole piece thickness variation measuring system, as shown in fig. 1 and fig. 2, the battery pole piece thickness variation measuring system includes a battery pole piece thickness variation measuring device 100 and a battery 200 disposed in the battery pole piece thickness variation measuring device 100, and the battery pole piece thickness variation measuring device 100 is configured to detect a variation of a thickness of a pole piece of the battery 200 in environments such as charging and discharging. Wherein the battery 200 may be, but is not limited to, a lithium ion battery 200.
The battery 200 includes a positive plate, a diaphragm, and a negative plate (the positive plate, the diaphragm, and the negative plate are not shown in the figure) that are sequentially disposed, and a small amount of electrolyte is disposed between the diaphragm and the positive plate and between the diaphragm and the negative plate. The amount of electrolyte is sufficient to ensure that the battery 200 is normally discharged or charged. In order to ensure insulation between the positive electrode sheet and the negative electrode sheet, the size of the separator is generally slightly larger than that of the positive electrode sheet and the negative electrode sheet, and the positive electrode sheet and the negative electrode sheet are generally substantially the same in size and are generally arranged in a positive-to-negative manner.
The device 100 for measuring the thickness variation of the battery pole piece comprises a shell 110, a movable plug 120, an elastic member 130 and a charging and discharging device 180. The case 110 is provided therein with a battery receiving portion for receiving the battery 200 to be tested (the position of the battery 200 is an approximate position of the battery receiving portion in the drawing). The charge and discharge device 180 is used to electrically connect the positive and negative electrode tabs of the battery 200 to charge the battery 200 or discharge the battery 200. The movable plug 120 is disposed in the housing 110 and is movable in a thickness direction of the battery 200 in the battery receiving portion, and the elastic member 130 is used to provide elastic force for the movable plug 120 to be attached to a pole piece of the battery 200 in the battery receiving portion. The elastic member 130 may be, but is not limited to, a spring. The elastic force applied by the spring can be set according to specific requirements, and the positive plate, the diaphragm and the negative plate can be ensured to be in close contact. In this embodiment, the negative electrode tab of the battery 200 is disposed opposite to the movable stopper 120. Of course, in other embodiments, the positive electrode tab of the battery 200 may be provided to face the movable stopper 120. The displacement sensor 140 is used to detect the displacement of the movable stopper 120 in the thickness direction of the battery 200. The displacement sensor 140 may be, but is not limited to, a laser displacement sensor. The laser displacement sensor has high precision and high data reliability. Such as a laser displacement sensor model CL-L007G.
Optionally, the device 100 for measuring thickness variation of a battery pole piece further includes a computer or other intelligent terminal 300, and the controller 141 of the displacement sensor 140 is connected to the intelligent terminal 300, so as to transmit the detection result of the displacement sensor 140 to the intelligent terminal 300 for storage and analysis. The charging and discharging device 180 may also be connected to the intelligent terminal 300 to transmit charging and discharging related data to the intelligent terminal 300 for storage and analysis. Of course, in other embodiments, the smart terminal 300 may not be provided.
In this embodiment, the elastic member 130 provides the movable plug 120 with an elastic force that is attached to the pole piece of the battery 200, when the thickness of the pole piece of the battery 200 changes due to the release of lithium during the charging and discharging processes, the battery 200 pushes the movable plug 120 to move, the displacement sensor 140 detects the displacement of the movable plug 120 in the thickness direction of the battery 200 in real time, so as to obtain the thickness change data of the two pole pieces of the battery 200 under the charging and discharging conditions, the thickness change value of the other pole piece can be measured by using one pole piece with known thickness change, which has a guiding significance for studying the expansion-contraction effect of the pole piece material of the battery 200 during the charging and discharging processes, and also provides in-situ data for the failure analysis of the battery 200; moreover, the device 100 for measuring the thickness variation of the battery pole piece provided by the embodiment can be repeatedly used, is economical and economical, and has good repeatability of measurement data of different batches because the movable plug 120 is not influenced by other resistances except the pressure of the spring.
In other embodiments, the charge/discharge device 180 may not be provided, and the change in the thickness of the pole piece of the battery 200 in other environments may be detected.
Optionally, the housing 110 is a sealing structure to prevent external air, moisture, and the like from affecting the battery 200. For the convenience of assembly, the housing 110 includes a lower housing 111 and an upper housing 112 which are oppositely disposed and detachably coupled. Alternatively, the peripheral portions of the upper case 112 and the lower case 111 are detachably connected by bolts 114 and nuts 115. The nut 115 may be, but is not limited to, a wing nut. The number of the bolts 114 and the nuts 115 can be set according to specific requirements, and four bolts 114 and four nuts 115 are taken as an example in the present embodiment. A second sealing ring 116 is preferably, but not limited to, disposed between the upper casing 112 and the lower casing 111 to improve the sealing performance of the casing 110. The number of the second sealing rings 116 can be set according to specific needs, and the number of the second sealing rings 116 is two in this embodiment. The seal rings herein may be, but are not limited to, O-ring seals. During tightening of bolts 114, second seal ring 116 is compressed and deformed to effect a seal.
As shown in fig. 2, the battery receiving part is located on the lower case 111. The lower end of the movable plug 120 is disposed opposite to the battery receiving portion to contact the negative electrode tab of the battery 200, and the upper end is movably inserted into a first through hole 1121 formed in the upper case 112. The height of the first through hole 1121 may be set according to specific requirements, and the height of the first through hole 1121 should be not less than the maximum variation value of the thickness of the pole piece of the battery 200. The displacement sensor 140 is disposed right above the first through hole 1121. Optionally, the movable plug 120 includes an abutting portion 121 for contacting the battery 200 and a rod portion 122 disposed on the abutting portion 121, and a diameter of the abutting portion 121 is larger than a diameter of the rod portion 122. The axes of the abutment 121 and the stem portion 122 are preferably, but not limited to, substantially collinear, i.e., the movable plug 120 is generally in the shape of an inverted T. The elastic element 130 is sleeved on the rod portion 122 and located between the upper housing 112 and the abutting portion 121.
In order to improve the sealing between the displacement sensor 140 and the housing 110. The housing 110 further includes a mounting block 113, the mounting block 113 is detachably mounted on the upper housing 112, and the displacement sensor 140 is disposed through the second through hole 1131 of the mounting block 113. A transparent member 160 positioned between the upper end of the movable stopper 120 and the displacement sensor 140 is disposed between the mounting block 113 and the upper case 112; a first sealing ring 170 is disposed between the transparent member 160 and the upper housing 112. The transparent member 160 may be, but is not limited to be, plate-shaped. The upper and lower end faces of the transparent member 160 are parallel. The transparent member 160 may be made of, but is not limited to, plastic or glass material. The sensing end of the displacement sensor 140 is preferably, but not limited to, in contact with the transparent member 160.
For convenience of installation, the upper case 112 includes a main body 1122 and a boss 1123 provided on the main body 1122, a first through hole 1121 penetrates through the main body 1122 and the boss 1123, and the mounting block 113 is screwed on the boss 1123. Specifically, the mounting block 113 includes a first mounting portion 1132 and a second mounting portion 1133, the second through hole 1131 is opened on the second mounting portion 1133, a threaded hole communicated with the second through hole 1131 is opened on the first mounting portion 1132, and the first mounting portion 1132 is screwed on the protruding portion 1123. During installation of the mounting block 113 to the upper housing 112, pressure is applied to the transparent member 160, thereby deforming the first sealing ring 170 to seal.
The battery receiving portion is not limited in structure, and the battery 200 to be tested may be placed therein. However, in order to stabilize the battery 200, the battery receiving portion includes a first positioning groove 1111 provided in the lower case 111 and a second positioning groove provided in a groove bottom of the first positioning groove 1111, the second positioning groove being used to receive one pole piece of the battery 200, and the groove bottom of the first positioning groove 1111 being used to receive a separator of the battery 200 and another pole piece of the battery 200 (since the second positioning groove is filled with the battery 200, the second positioning groove is not indicated). In this embodiment, the second positioning groove accommodates the positive electrode plate, and the first positioning groove 1111 accommodates the negative electrode plate. The inner diameter of the second positioning groove is equal to or slightly larger than the diameter of the positive plate contained in the second positioning groove, and the diameter of the bottom of the first positioning groove 1111 is equal to or slightly larger than the diameter of the diaphragm, so that the positive plate and the diaphragm are limited. In order to limit the negative electrode plate and ensure the insulation between the positive electrode plate and the negative electrode plate, an insulating positioning ring 1112 is further arranged at the bottom of the first positioning groove 1111, the diameter of the positioning ring 1112 is equal to or slightly smaller than the inner diameter of the first positioning groove 1111, and the inner diameter of the positioning ring 1112 is equal to or slightly larger than the diameter of the negative electrode plate. Optionally, the inner diameter of the positioning ring 1112 is equal to or slightly larger than the diameter of the abutment 121. The internal through-hole of the positioning ring 1112 is substantially aligned with the second positioning groove such that the positive and negative plates are substantially aligned. In other embodiments, the positions of the positive electrode tab and the negative electrode tab may be interchanged. Namely, the negative plate is placed in the second positioning groove, and the positive plate is placed in the positioning ring 1112.
Optionally, the axes of the positioning ring 1112, the movable plug 120, the first through hole 1121, and the second through hole 1131 substantially coincide.
The specific connection manner of the charge and discharge device 180 and the positive electrode tab and the negative electrode tab of the battery 200 is not limited. In order to save the inner space of the housing 110 and to facilitate the operation, the charging and discharging device 180 is optionally located outside the housing 110. Further, the upper case 112, the lower case 113, and the movable plug 120 are made of a conductive material, the upper case 112 and the lower case 113 are connected in an insulating manner, the charge and discharge device 180 is electrically connected to one pole piece of the battery 200 (the negative pole piece of the battery 200 in this embodiment) through the upper case 112 and the movable plug 120, and the charge and discharge device 180 is electrically connected to the other pole piece of the battery 200 (the positive and negative pole pieces of the battery 200 in this embodiment) through the lower case 111. The charging and discharging device 180 is electrically connected to the upper case 112 and the lower case 111 through the conductive member 150. Wherein, in order to ensure the conductivity, the elastic member 13 is also made of a conductive material. In order to ensure insulation between the upper case 112 and the lower case 111, the bolt 114 and the nut 115 are made of an insulating material. The second coil 116 is also made of an insulating material.
It should be noted that the connection manner between the charging and discharging device 180 and the positive plate and the negative plate of the battery 200 is not limited to the above, for example, in other embodiments, the upper casing 112 and the lower casing do not need to be made of conductive materials, but the movable plug 120 may be electrically connected to the charging device 180 through a conducting wire penetrating through the casing, so that the battery plate opposite to the movable plug 120 is electrically connected to the charging device 180; meanwhile, the battery accommodating part is insulated, so that another lead penetrating through the battery accommodating part is electrically connected with another pole piece of the battery. In this embodiment, it is preferable to seal the conductive portion of the case 110.
The following briefly introduces a method for using the system for measuring thickness variation of a battery pole piece provided by the present embodiment:
the battery pole piece thickness variation measuring device 100 can be repeatedly used. To ensure the accuracy of the detection result, the device 100 for measuring the thickness variation of the battery pole piece is cleaned before use. Optionally, the upper housing 112, the lower housing 111, the transparent member 160, the positioning ring 1112, the movable plug 120, the first sealing ring 170, the second sealing ring 116, the elastic member 130, and the like are soaked in ethanol, and then the above components are wiped clean with dust-free cloth and placed in an oven for drying.
The battery 200 is disposable and is assembled in the battery pole piece thickness variation measuring device 100 with each experimental process. Before assembly, a positive plate, a negative plate and a diaphragm are prepared. The positive plate and the negative plate are prepared as follows: preparing corresponding anode slurry and cathode slurry according to a designed proportion (the proportion is determined according to the components of the pole piece which are measured according to specific needs), and respectively coating the anode slurry and the cathode slurry on an aluminum foil and a copper foil to prepare a single-sided pole piece. The positive and negative electrode sheets are rolled to a specific compaction density and formed into a specific shape and size using a punch. The diaphragm is formed into a specific shape. And before detection, placing the positive plate, the negative plate and the diaphragm in a vacuum oven for baking and dewatering. In order to prevent the external air and moisture from interfering with the detection result, the assembly process of the battery 200 is performed in a glove box under an inert atmosphere. And placing the dried battery pole piece thickness change measuring device 100, the positive pole piece, the negative pole piece and the diaphragm in a glove box. The positive plate is placed in the second positioning groove, an appropriate amount of electrolyte is added, the diaphragm is placed at the bottom of the first positioning groove 1111, the positioning ring 1112 is placed in the first positioning groove 1111, an appropriate amount of electrolyte is added, and the negative plate is placed in the positioning ring 1112.
Subsequently, the movable plug 120, the elastic member 130, the second sealing ring 116, and the upper housing 112 are sequentially placed. The upper case 112 and the lower case 111 are locked using bolts 114 and nuts 115. In this process, the elastic member 130 is compressed by a force so that the movable stopper 120 is in close contact with the battery 200, thereby ensuring close contact among the negative electrode tab, the separator, and the positive electrode tab.
The first sealing ring 170 and the transparent member 160 are sequentially placed over the boss 1123 of the upper case 112, and the mounting block 113 is screwed onto the boss 1123. During the tightening process of the mounting block 113, the transparent member 160 is forced to compress the first sealing ring 170, and the first sealing ring 170 and the second sealing ring 116 together ensure the sealing performance of the housing 110.
The displacement sensor 140 is then installed in the second through hole 1131 of the mounting block 113, such that the detection end of the displacement sensor 140 is tightly attached to the transparent member 160. Of course, the displacement sensor 140 may be installed after the entire apparatus is taken out of the glove box.
During measurement, the two wires 150 of the case 110 are connected to the charging and discharging device 180, respectively. The charge and discharge device 180 is electrically connected to the positive electrode tab of the battery 200 through one lead 150 and the lower case 111, and the charge and discharge device 180 is electrically connected to the negative electrode tab of the battery 200 through the other lead 150, the upper case 112, the movable plug 120, and the elastic member 130. Then, the displacement sensor 140 emits a beam of light source, the light source irradiates the upper end surface of the movable plug 120 through the transparent member 160 and then reflects, the reflected light is received by the displacement sensor 140, and the distance from the displacement sensor 140 to the upper end surface of the movable plug 120 can be obtained through calculation by the controller 141 matched with the displacement sensor 140. When the thickness of the pole piece of the battery 200 changes, the battery 200 pushes the movable plug 120 to move, and the distance measured by the displacement sensor 140 changes when the movable plug 120 moves up and down, wherein the change value is the displacement of the movable plug 120 and the change value of the thicknesses of the two pole pieces of the battery. The thickness variation value of one pole piece with known thickness variation value can be used to calculate the thickness variation value of the other pole piece.
The thickness variation value of the pole piece with the known thickness variation value can be measured in the following way:
1) and respectively preparing a positive plate I, a positive plate II, a negative plate I and a negative plate II.
2) The thickness variation measuring device for the battery pole piece provided by the embodiment is used for measuring the thickness variation values of four combinations of the positive pole piece I and the negative pole piece I, the positive pole piece I and the negative pole piece II, the positive pole piece II and the negative pole piece I, the positive pole piece II and the negative pole piece II under the same test condition.
3) And four equations can be established according to the data of the four combined tests, so that the thickness change values of the positive plate I, the positive plate II, the negative plate I and the negative plate II under the test conditions can be respectively calculated. Further, the positive electrode sheet or the negative electrode sheet having a known thickness variation value may be used as a reference electrode to measure the thickness variation value of the other electrode.
Alternatively, the thickness variation values of a plurality of pole pieces with unknown thicknesses can be measured simultaneously by combining a plurality of groups of pole pieces.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. A battery pole piece thickness variation measuring device is characterized by comprising:
a case in which a battery receiving part for receiving a battery to be tested is provided;
a movable stopper provided in the case and movable in a thickness direction of the battery in the battery housing part;
an elastic member for providing the movable stopper with an elastic force that is in contact with the positive electrode tab or the negative electrode tab of the battery in the battery housing portion;
a displacement sensor for detecting displacement of the movable stopper.
2. The battery pole piece thickness variation measuring device of claim 1,
the shell comprises a lower shell and an upper shell which are oppositely arranged and detachably connected.
3. The battery pole piece thickness variation measuring device of claim 2,
the battery accommodating part is positioned on the lower shell;
the lower end of the movable plug is opposite to the battery accommodating part, and the upper end of the movable plug is movably arranged in a first through hole formed in the upper shell in a penetrating manner;
the displacement sensor is arranged right above the first through hole.
4. The battery pole piece thickness variation measuring device of claim 3,
the shell further comprises a mounting block, and the mounting block is detachably mounted on the upper shell;
the displacement sensor is arranged in the second through hole in the mounting block in a penetrating mode;
the mounting block with be provided with between the last casing and be located the upper end of activity stopper with transparent between the displacement sensor, transparent with be provided with first sealing washer between the last casing.
5. The battery pole piece thickness variation measuring device of claim 4,
the upper shell comprises a main body and a boss arranged on the main body, and the first through hole penetrates through the main body and the boss; the mounting block is in threaded connection with the boss.
6. The battery pole piece thickness variation measuring device of claim 3,
the charging and discharging device can be connected with one of the positive plate and the negative plate of the battery through the upper shell and the movable plug, and can also be connected with the other one of the positive plate and the negative plate of the battery through the lower shell.
7. The battery pole piece thickness variation measuring device of any one of claims 2 to 6, wherein the battery accommodating portion comprises a first positioning groove formed on the lower case and a second positioning groove formed on a groove bottom of the first positioning groove, the second positioning groove is used for accommodating one of the positive pole piece and the negative pole piece of the battery, the groove bottom of the first positioning groove is used for accommodating the diaphragm of the battery and the other of the positive pole piece and the negative pole piece of the battery; the inner diameter of the second positioning groove is equal to or larger than the diameter of the positive electrode plate or the negative electrode plate contained in the second positioning groove, and the diameter of the bottom of the first positioning groove is equal to or larger than the diameter of the diaphragm.
8. The battery pole piece thickness variation measuring device of claim 7,
an insulated positioning ring is further arranged at the bottom of the first positioning groove and used for accommodating the positive plate or the negative plate in the first positioning groove; the inner diameter of the positioning ring is equal to or larger than the diameter of the positive plate or the negative plate contained in the positioning ring.
9. The battery pole piece thickness variation measuring device of any one of claims 2 to 6, wherein a second sealing ring is arranged between the lower shell and the upper shell.
10. A battery pole piece thickness variation measurement system, comprising:
the battery pole piece thickness variation measurement device of any one of claims 1 to 9; and
the battery, it set up in on battery holding portion of battery sheet thickness variation measuring device and its positive plate, diaphragm and the negative pole piece including setting gradually, the diaphragm with the positive plate with all be provided with electrolyte between the negative pole piece, the negative pole piece perhaps the positive plate with the activity stopper contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920973729.5U CN209991940U (en) | 2019-06-26 | 2019-06-26 | Battery pole piece thickness variation measuring device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920973729.5U CN209991940U (en) | 2019-06-26 | 2019-06-26 | Battery pole piece thickness variation measuring device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209991940U true CN209991940U (en) | 2020-01-24 |
Family
ID=69297034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920973729.5U Active CN209991940U (en) | 2019-06-26 | 2019-06-26 | Battery pole piece thickness variation measuring device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209991940U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697280A (en) * | 2020-06-22 | 2020-09-22 | 清华大学 | Battery device capable of monitoring electrode stress change in real time, battery adopting device and application of device |
| CN113358253A (en) * | 2021-04-30 | 2021-09-07 | 上海工程技术大学 | Columnar battery expansion force and displacement measuring device |
| CN113777105A (en) * | 2021-09-03 | 2021-12-10 | 河北地质大学 | Optical fiber detection system for monitoring abrasion of carbon slide plate of pantograph |
| CN114279377A (en) * | 2021-12-08 | 2022-04-05 | 蜂巢能源科技股份有限公司 | Evaluation system and evaluation method for volume change of battery material in charging and discharging processes |
| CN115098704A (en) * | 2022-08-24 | 2022-09-23 | 深圳市信润富联数字科技有限公司 | Battery pole piece thickness prediction method, device and equipment and readable storage medium |
-
2019
- 2019-06-26 CN CN201920973729.5U patent/CN209991940U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697280A (en) * | 2020-06-22 | 2020-09-22 | 清华大学 | Battery device capable of monitoring electrode stress change in real time, battery adopting device and application of device |
| CN113358253A (en) * | 2021-04-30 | 2021-09-07 | 上海工程技术大学 | Columnar battery expansion force and displacement measuring device |
| CN113777105A (en) * | 2021-09-03 | 2021-12-10 | 河北地质大学 | Optical fiber detection system for monitoring abrasion of carbon slide plate of pantograph |
| CN114279377A (en) * | 2021-12-08 | 2022-04-05 | 蜂巢能源科技股份有限公司 | Evaluation system and evaluation method for volume change of battery material in charging and discharging processes |
| CN114279377B (en) * | 2021-12-08 | 2024-03-22 | 蜂巢能源科技股份有限公司 | Evaluation system and evaluation method for volume change in charge-discharge process of battery material |
| CN115098704A (en) * | 2022-08-24 | 2022-09-23 | 深圳市信润富联数字科技有限公司 | Battery pole piece thickness prediction method, device and equipment and readable storage medium |
| CN115098704B (en) * | 2022-08-24 | 2023-01-06 | 深圳市信润富联数字科技有限公司 | Battery pole piece thickness prediction method, device and equipment and readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209991940U (en) | Battery pole piece thickness variation measuring device and system | |
| KR101983849B1 (en) | The testing and measuring system for battery cell | |
| CN108776311A (en) | A kind of quadrate lithium battery inflatable detection device and detection method | |
| CN207352070U (en) | A kind of lithium battery diaphragm ionic conductivity apparatus | |
| CN107102041B (en) | Laminated three-electrode electrolytic tank for electrochemical test of in-situ lithium battery | |
| KR20120125619A (en) | Methods and systems for measuring state of charge | |
| CN111697280B (en) | Battery device capable of monitoring electrode stress change in real time, battery adopting device and application of device | |
| CN111880107A (en) | Method and device for detecting state of charge of lithium ion battery | |
| CN207690947U (en) | A kind of lithium ion battery test device | |
| CN111129432A (en) | Novel reference electrode and three-electrode system for nondestructive testing of lithium ion battery industry and method | |
| CN104730465B (en) | Lithium ion battery detection system and detection method adopting same | |
| CN111398683B (en) | Solid electrolyte ionic conductivity test fixture and test method | |
| CN108511809A (en) | A kind of lithium battery electrolytes electrolyte filling method | |
| JP2016122505A (en) | Nonaqueous electrolyte secondary battery, and method for evaluation of in-battery gas generation amount with such battery | |
| CN105973691B (en) | A kind of lead storage battery partition anti-puncture method for testing performance and special fixture | |
| CN111580001A (en) | Battery volume change in-situ testing device | |
| CN213843473U (en) | Lithium battery charging and discharging testing device | |
| CN201392855Y (en) | Battery cover plate assembly and lithium ion secondary battery | |
| CN212341403U (en) | Battery volume change in-situ testing device | |
| CN211718476U (en) | Solid-state battery rapid measuring device | |
| CN205581220U (en) | Lithium ion battery electrode material electrical performance test device | |
| JP2017076528A (en) | All-solid battery system | |
| CN114062929B (en) | Design method of expansion space of lithium battery and equipment for designing expansion space of lithium battery | |
| CN219037885U (en) | Cylindrical cell expansion detection device | |
| CN110661048A (en) | Liquid battery efficiency detection device and detection method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518106 Gongming City, Guangdong province Guangming New District Office of the West community high and New Technology Industrial Park, building eighth, Patentee after: Beitrei New Materials Group Co., Ltd Address before: 518106 Gongming City, Guangdong province Guangming New District Office of the West community high and New Technology Industrial Park, building eighth, Patentee before: Shenzhen BTR New Energy Materials Inc. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200304 Address after: 516227 High Temperature Calcination Workshop of Huyangkeng Section, Huangdong Village, Zhenlong Town, Huiyang District, Huizhou City, Guangdong Province Patentee after: Huizhou Dingyuan New Energy Technology Co., Ltd. Address before: 518106 Gongming City, Guangdong province Guangming New District Office of the West community high and New Technology Industrial Park, building eighth, Patentee before: Beitrei New Materials Group Co., Ltd |