CN218297451U

CN218297451U - Pressure change testing device for charging and discharging shell of square aluminum shell lithium battery

Info

Publication number: CN218297451U
Application number: CN202221883397.XU
Authority: CN
Inventors: 宗哲; 孙先富; 卢盛辉; 谷亦杰
Original assignee: Tianke New Energy Co ltd
Current assignee: Tianke New Energy Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2023-01-13
Anticipated expiration: 2032-07-20

Abstract

The utility model discloses a pressure variation testing arrangement for square aluminum hull lithium cell charge-discharge casing relates to lithium battery test equipment technical field, including shell, lift clamp plate, the piece is drawn in the lift, extrudees the slide, pressure sensor, push mechanism. The utility model discloses a set up push mechanism, this mechanism can realize the purpose of conveniently placing or taking the lithium cell, drive first gear revolve through starter motor, pass through the second gear this moment, mutually supporting of threaded rod and spacing change, can drive the step-up pressure plate and rise, simultaneously through connecting the push pedal, spacing slide bar, a spring, the lift arm-tie, connect the arm-tie and extrude the mutually supporting of slider and above-mentioned part, can make sliding bottom remove to assigned position department, place the upper surface at sliding bottom with the lithium cell simultaneously, then carry out the reverse operation to above-mentioned operation, thereby realize the purpose of conveniently placing or taking the lithium cell.

Description

Pressure change testing device for charging and discharging shell of square aluminum shell lithium battery

Technical Field

The utility model relates to a lithium battery detection equipment technical field specifically is a pressure variation testing arrangement for square aluminum hull lithium cell charge-discharge casing.

Background

In general, a lithium metal battery uses manganese dioxide as a positive electrode material, lithium metal or an alloy metal thereof as a negative electrode material, and a nonaqueous electrolyte solution.

As an effective electric energy storage device, a lithium ion battery has the advantages of high energy density, large specific power, high output voltage, small self-discharge, long service life and the like, and is widely applied to the fields of electric automobiles, electronic products and the like at present, but in the electrochemical cycle process, the whole battery is deformed mainly in the thickness direction because the de-intercalation process of lithium ions can cause the volume expansion and shrinkage of electrode materials and the gas and heat generation phenomena inside the battery occur. Because the lithium concentration inside the battery is not uniformly distributed, the stress when the battery core expands is not uniformly distributed.

Therefore, the lithium battery is detected by the device for testing the pressure change of the charging and discharging shell of the square aluminum shell lithium battery, the internal parts of the device comprise a base, a pressure thickness sensor and the like, the battery is placed on the base when the device is used, the sensors are evenly distributed on the surface of the battery, then the charging and discharging cycle test is carried out on the battery in a constant gap mode, the maximum expansion force curve of the battery core is synchronously acquired, the lithium ions are continuously separated from the positive electrode and embedded into the negative electrode along with the lithium ions, so that the negative electrode structure expands, the pressure continuously rises, the lithium ions are separated from the negative electrode and return to the positive electrode during discharging, the negative electrode structure continuously contracts, the pressure is continuously reduced, the expansion force change of different positions on the surface of the battery core in the charging and discharging process is effectively monitored, the stress distribution difference on the surface of the battery core can be quantitatively represented, a deeper visual angle can be provided for the stress analysis of the battery core, the internal stress distribution of the battery core can be assisted by technicians, the reasons of the failed battery core can be researched, and the safer and more reliable battery core can be developed.

And according to above-mentioned device in the use, need manually send into the inside to the device with the lithium cell, and place on the base, and need be located the position of base upper surface to the lithium cell and adjust, this phenomenon that takes place mutual friction between the shell that leads to the lithium cell easily and the base and scrape the damage, need take out the lithium cell is manual after detecting simultaneously, nevertheless because the space that the device is located lithium cell position department is comparatively narrow, lead to being comparatively hard at the in-process that takes out the lithium cell, we have proposed a pressure change testing arrangement who is used for square aluminum hull lithium cell to charge and discharge casing for this reason.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an: in order to solve the problem that can't carry out convenient placing or taking out to the lithium cell, provide a pressure variation testing arrangement who is used for square aluminum hull lithium cell charge-discharge casing.

In order to achieve the above object, the utility model provides a following technical scheme: a pressure change testing device for a charging and discharging shell of a square aluminum shell lithium battery comprises a shell and a lifting pressure plate, wherein an electric push rod is installed at the top end of the shell through a bolt, a lifting pulling block fixedly connected with the output end of the electric push rod through a coupler is installed at the top end of the lifting pressure plate through a bolt, a plurality of extrusion sliding plates are sleeved on two sides of the bottom end of the lifting pressure plate in a sliding mode, a pressure sensor is installed at the top end of each extrusion sliding plate, and pushing mechanisms which are sleeved with the shell in a sliding mode and used for automatically pushing the lithium battery are arranged at two ends of the lifting pressure plate;

push mechanism is including connecting push pedal, sliding bottom, spacing slide bar, spring, lift arm-tie, connection arm-tie and extrusion slider, it is provided with two, two to connect the arm-tie and pass through hot pressing respectively the shaping at the both ends of lift arm-tie one side, and slide with the shell and cup joint, the lift arm-tie passes through hot briquetting and is connecting the bottom of arm-tie, sliding bottom slides and cup joints in the inside of shell, and is located the below of lift arm-tie, the extrusion slider is provided with two, two the extrusion slider passes through the welding to be fixed respectively at the both ends of sliding bottom one side, and contacts with one side outer wall of being connected the arm-tie, spacing slide bar passes through welded fastening and keeps away from one side of connecting the arm-tie at the extrusion slider, and slides with the shell and cup joints, connect the push pedal and pass through hot briquetting in one side of sliding bottom, and be located one side outer wall of shell to pass through welded fastening with spacing slide bar and be connected, the spring sets up the outer wall in one side of extrusion slider, and cup joint each other with spacing slide bar.

As the utility model discloses further scheme again: the internally mounted of lift arm-tie has nuclear radiation thickness sensor, the inside of shell just is located the lift arm-tie and installs the radiation generator who corresponds with nuclear radiation thickness sensor under, pressure sensor, nuclear radiation thickness sensor and radiation generator all pass through wire and controller electric connection, shell and step up and down the arm-tie, connect the arm-tie and meet the position department and offer and supply to rise and fall board, lift arm-tie, connect the gliding lift spout of arm-tie.

As the utility model discloses further scheme again: the outer wall of one side of the shell, which is located at the position where the spring is far away from the extrusion sliding block, is provided with a protruding part which is mutually matched with the outer wall of the limiting sliding rod and used for blocking the spring, and the sliding pressing groove for the sliding bottom plate and the limiting sliding rod to slide is formed in the connecting position of the shell, the sliding bottom plate and the limiting sliding rod.

As a further aspect of the present invention: the upper surface of the lifting pulling plate is in a slope shape, the lower surface of the extrusion sliding block is provided with an extrusion surface matched with the upper surface of the lifting pulling plate, and the extrusion surface of the extrusion sliding block is provided with a ball.

As the utility model discloses further scheme again: the output end of the motor is rotationally connected with the shell through a bearing, and a rotating sleeve groove for the rotation of the limiting rotating ring is formed in the joint of the shell and the limiting rotating ring.

Compared with the prior art, the beneficial effects of the utility model are that:

through setting up push mechanism, this mechanism can realize the convenient purpose of placing or taking the lithium cell, drive first gear revolve through starter motor, pass through the second gear this moment, threaded rod and spacing change the mutually supporting of ring, can drive the lift arm-tie and rise, simultaneously through connecting the push pedal, spacing slide bar, a spring, the lift arm-tie, connect arm-tie and extrusion slider and the mutually supporting of above-mentioned part, can make sliding bottom remove to assigned position department, place the upper surface at sliding bottom with the lithium cell simultaneously, then carry out the reverse operation to above-mentioned operation, thereby realize the convenient purpose of placing or taking the lithium cell.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic sectional view of the housing of the present invention;

fig. 3 is a schematic structural view of the pushing mechanism of the present invention.

In the figure: 1. a housing; 2. a pushing mechanism; 201. connecting a push plate; 202. a sliding bottom plate; 203. a limiting slide bar; 204. a spring; 205. lifting and pulling plates; 206. connecting a pulling plate; 207. extruding the slide block; 3. an electric push rod; 4. a voltage rising and falling plate; 5. lifting the pulling block; 6. extruding the sliding plate; 7. a pressure sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-3, in an embodiment of the present invention, a pressure variation testing apparatus for a square aluminum-shell lithium battery charging/discharging shell, includes a shell 1, a lifting platen 4, an electric push rod 3 is installed on the top end of the shell 1 through a bolt, a lifting pull block 5 fixedly connected to the output end of the electric push rod 3 through a shaft coupling is installed on the top end of the lifting platen 4 through a bolt, a plurality of extrusion slide plates 6 are slidably sleeved on both sides of the bottom end of the lifting platen 4, a pressure sensor 7 is installed on the top end of the extrusion slide plates 6, a nuclear radiation thickness sensor is installed inside the lifting pull block 5, a radiation generator corresponding to the nuclear radiation thickness sensor is installed inside the shell 1 and under the lifting pull block 5, the pressure sensor 7, the nuclear radiation thickness sensor and the radiation generator are electrically connected to a controller through wires, and a pushing mechanism 2 for automatically pushing the lithium battery is installed on both ends of the lifting platen 4;

the pushing mechanism 2 comprises a connecting push plate 201, a sliding bottom plate 202, a limiting sliding rod 203, a spring 204, two lifting pull plates 205, a connecting pull plate 206 and an extrusion sliding block 207, the connecting pull plates 206 are provided, the two connecting pull plates 206 are respectively formed at two ends of one side of the lifting pressing plate 4 through hot pressing and are in sliding sleeve joint with the shell 1, the lifting pull plate 205 is formed at the bottom end of the connecting pull plate 206 through hot pressing, lifting sliding chutes for the lifting pressing plate 4, the lifting pull plates 205 and the connecting pull plates 206 to slide are formed at the joint positions of the shell 1 and the lifting pressing plate 4, the lifting pull plates 205 and the connecting pull plates 206, the upper surface of the lifting pull plate 205 is in a slope shape, the sliding bottom plate 202 is in sliding sleeve joint with the inside of the shell 1 and is positioned below the lifting pressing plate 4, extrusion slider 207 is provided with two, two extrusion sliders 207 are fixed respectively at the both ends of sliding bottom 202 one side through the welding, and contact with one side outer wall of connecting arm-tie 206, the extrusion face of mutually matchd with the upper surface of lift arm-tie 205 is seted up to extrusion slider 207's lower surface, the ball is installed to extrusion slider 207's extrusion face, spacing slide bar 203 is through welded fastening in the one side of connecting arm-tie 206 is kept away from to extrusion slider 207, and slide and cup joint with shell 1, it passes through hot briquetting in one side of sliding bottom 202 to connect push pedal 201, and be located one side outer wall of shell 1, and pass through welded fastening with spacing slide bar 203 and be connected, spring 204 sets up the one side outer wall at extrusion slider 207, and cup joint each other with spacing slide bar 203.

In this embodiment: when the lifting slide block device is used, the lifting slide block 5 is driven to ascend through the electric push rod 3, the lifting slide block 5 drives the plurality of extrusion slide plates 6 to ascend through the lifting slide plate 4, at the same time, the lifting slide plate 4 drives the lifting slide plate 205 to slide and ascend along the inner wall of the shell 1 through the connecting slide plate 206, when the inclined upper surface of the lifting slide plate 205 is contacted with the extrusion surface of the extrusion slide block 207, at the same time, the extrusion slide block 207 drives the slide bottom plate 202 to slide along the outer wall of the lifting slide plate 205 through balls, at the same time, the slide bottom plate 202 pushes the connecting slide plate 201 to move, at the same time, the limiting slide rod 203 slides along the inner wall of the shell 1 under the driving of the connecting slide plate 201 and the extrusion slide block 207, at the same time, the extrusion slide block 207 extrudes the spring 204, at the same time, the shell 1 blocks the spring 204 through the protruding part, and the spring 204 contracts under the extrusion of the extrusion slide block 207, when the sliding bottom plate 202 moves to a designated position, stopping the electric push rod 3 to drive the lifting pull block 5 to ascend, then placing a lithium battery on the upper surface of the sliding bottom plate 202, respectively connecting wires for charging and discharging with the positive and negative electrodes of the lithium battery, starting the electric push rod 3 to perform reverse operation on the operations, so that the sliding bottom plate 202 drives the lithium battery to move right above the radiation generator, then pushing the lifting pull block 5 to descend through the electric push rod 3, enabling the lifting pull block 5 to enable the plurality of extrusion sliding plates 6 to contact the upper surface of the lithium battery through the lifting pull block 4, then stopping the electric push rod 3 and enabling the controller to simultaneously start the pressure sensor 7, the nuclear radiation thickness sensor and the radiation generator through the wires, and supplying power to the lithium battery through the wires, wherein the radiation generated by the radiation generator penetrates through the lithium battery to be received by the nuclear radiation thickness sensor, at this time, special explanations are required: the nuclear radiation thickness sensor works based on the absorption, back scattering or ionization excitation of the measured substance by the radiation of the measured substance, the radioactive isotope emits particles with certain energy in the decay process, such as beta particles, the thickness and density of the material can be measured according to the absorption of the material to the beta particle radiation, when the lithium battery expands, a plurality of extrusion sliding plates 6 extrude the pressure sensor along the inner wall of the pressure rising and reducing plate 4 under the extrusion of the lithium battery, and the specific description is needed: semiconductor piezoelectric impedance diffusion pressure sensor is at the formation semiconductor deformation pressure of thin slice surface, make the thin slice warp and produce the piezoelectric impedance effect through external force, thereby make the change of impedance convert the signal of telecommunication into, pressure sensor calculates through the inside of wire with signal of telecommunication transmission to controller simultaneously, thereby can obtain the condition of the produced internal stress distribution difference of lithium cell inflation, carry out the repetitive operation to above-mentioned operation after detecting the lithium cell, thereby can carry out convenient propelling movement to the lithium cell, so that place the stability of lithium cell.

Please refer to fig. 2 to 3, the outer wall of the housing 1 at one side of the spring 204 away from the extruding slider 207 is provided with a protrusion matching with the outer wall of the position-limiting sliding rod 203 and used for blocking the spring 204, and sliding grooves for the sliding of the sliding base plate 202 and the position-limiting sliding rod 203 are formed at the connecting positions of the housing 1, the sliding base plate 202 and the position-limiting sliding rod 203.

In this embodiment: the spring 204 is blocked while the pressing slider 207 presses the spring 204 by the protrusion, and at this time, the spring 204 is contracted by the pressing of the pressing slider 207, and the sliding bottom plate 202 and the limit sliding rod 203 can slide along the inner wall of the housing 1 by sliding the pressing grooves.

The above-mentioned, only be the embodiment of the preferred of the present invention, nevertheless the utility model discloses a protection scope is not limited to this, and any technical personnel familiar with this technical field is in the technical scope of the utility model discloses an according to the utility model discloses a technical scheme and utility model design in addition the replacement of equality or change, all should be covered within the protection scope of the utility model.

Claims

1. A pressure change testing device for a square aluminum shell lithium battery charging and discharging shell comprises a shell (1), an electric push rod (3), a lifting and dropping plate (4), a lifting and dropping block (5), an extrusion sliding plate (6) and a pressure sensor (7), and is characterized in that two ends of the lifting and dropping plate (4) are provided with pushing mechanisms (2) which are in sliding sleeve joint with the shell (1) and used for automatically pushing a lithium battery;

the pushing mechanism (2) comprises:

the lifting and dropping device comprises connecting pull plates (206) which are fixed at two ends of one side of a lifting and dropping plate (4) and are in sliding sleeve joint with a shell (1), a lifting pull plate (205) is fixedly connected to the bottom end of the connecting pull plate (206), a sliding base plate (202) is in sliding sleeve joint with the inside of the shell (1) and located below the lifting and dropping plate (4), an extruding sliding block (207) which is in contact with the outer wall of one side of the connecting pull plate (206) is fixedly connected to two ends of one side of the sliding base plate (202), a limiting sliding rod (203) which is in sliding sleeve joint with the shell (1) is fixedly connected to one side of the extruding sliding block (207), a connecting push plate (201) which is located on the outer wall of one side of the shell (1) and is in fixed connection with the limiting sliding rod (203), and a spring (204) which is in sliding sleeve joint with the limiting sliding rod (203) is connected to the outer wall of one side of the extruding sliding block (207).

2. The pressure change testing device for the charging and discharging shell of the square aluminum shell lithium battery as claimed in claim 1, wherein a nuclear radiation thickness sensor is installed inside the lifting pulling block (5), a radiation generator corresponding to the nuclear radiation thickness sensor is installed inside the shell (1) and under the lifting pulling block (5), and the pressure sensor (7), the nuclear radiation thickness sensor and the radiation generator are all electrically connected with the controller through wires.

3. The pressure variation testing device for the square aluminum shell lithium battery charging and discharging shell is characterized in that a protruding part which is matched with the outer wall of the limiting slide rod (203) and is used for blocking the spring (204) is arranged on the outer wall of one side, away from the extrusion slide block (207), of the shell (1).

4. The pressure change testing device for the charging and discharging shell of the square aluminum shell lithium battery as claimed in claim 1, wherein the upper surface of the lifting pulling plate (205) is in a slope shape, the lower surface of the extrusion sliding block (207) is provided with an extrusion surface matched with the upper surface of the lifting pulling plate (205), and the extrusion surface of the extrusion sliding block (207) is provided with a ball.