CN-121989239-A - Independent grabbing pressure feedback system of flexible adaptive soft-package lithium battery

Abstract

The invention belongs to the technical field of lithium battery production equipment, and relates to an independent grabbing pressure feedback system of a flexible adaptive soft-package lithium battery, which comprises a data storage module, a pressure acquisition module, a deformation detection module, a control unit and a driving adjustment module, wherein the data storage module stores standard deformation values, safe pressure intervals and driving reference parameters of the soft-package battery, the pressure and deformation acquisition module respectively acquires the pressure of the clamping surface and micro deformation data of the surface of the battery, the control unit processes the double signals through a fusion algorithm, generates a driving adjustment instruction according to the pressure matching state and the deformation trend, establishes a pressure-deformation dual early warning mechanism, and starts an emergency buffer program when the data exceeds a safety range. The system solves the problems of deformation, bulge and damage caused by improper pressure control when the soft package lithium battery is grabbed, realizes self-adaptive safe clamping, adapts to batteries with multiple specifications and individual differences, supports mixed flow production, can be directly connected with the existing automatic production line, and is suitable for soft package battery grabbing operation.

Inventors

• ZHANG KUNMING
• Lv Fangxue

Assignees

• 深圳市智佳能自动化有限公司

Dates

Publication Date

20260508

Application Date

20260202

Claims (10)

1. 1. Independent pressure feedback system that snatchs of flexible adaptation formula soft package lithium cell, its characterized in that includes: the data storage module is used for storing standard deformation threshold values, safety pressure range values and driving reference parameters corresponding to the soft package battery; the pressure acquisition module is used for acquiring pressure data of the clamping surface in real time in the process of grabbing the soft package battery; the deformation detection module is used for collecting tiny deformation data of the surface of the soft package battery in real time in the grabbing process of the soft package battery; The control unit is respectively in communication connection with the pressure acquisition module, the deformation detection module, the data storage module and the driving adjustment module, processes the received pressure data and deformation data through a preset fusion algorithm, dynamically generates a driving adjustment instruction according to a matching result of the pressure data and a safety pressure range value and a change trend of the deformation data, and feeds back the driving adjustment instruction aiming at the situation that the pressure is close to the preset proportion of the safety pressure range and the situation that the deformation data shows an ascending trend not lower than a preset amplitude through the driving adjustment module; When the pressure data exceeds a safe pressure range or the deformation data exceeds a standard deformation threshold, the control unit synchronously starts an emergency buffer program while generating a driving adjustment instruction, so that soft package battery damage caused by sudden faults is avoided, and a pressure-deformation dual early warning mechanism is formed; And the driving adjusting module is used for receiving and executing the driving adjusting instruction of the control unit, adjusting the clamping speed, the stroke buffering amplitude and the clamping pressure and realizing the self-adaptive clamping of the soft package battery.
2. 2. The flexible adaptive soft-pack lithium battery independent grabbing pressure feedback system according to claim 1, wherein the control unit and the driving adjustment module are integrally installed on the same installation body or directly installed on a shell of the driving adjustment module so as to shorten a signal transmission path; the industrial Ethernet and pulse signal dual transmission mechanism is adopted among the pressure acquisition module, the deformation detection module and the control unit, the transmission delay of the pressure data, the deformation data and the driving adjustment instruction does not exceed a preset delay threshold, and the control unit adopts a PLC and embedded chip cooperative architecture, so that the instantaneity of data processing and instruction output is ensured.
3. 3. The flexible adaptive soft pack lithium battery independent grabbing pressure feedback system of claim 1, wherein the emergency buffering procedure comprises: The control unit controls the driving adjustment module to quickly reduce the clamping pressure to a preset safety initial value which is not more than 1/3 of the lower limit of the safety pressure range; The control unit synchronously controls the clamping mechanism to retract slightly in the direction away from the soft package battery for letting the distance of the retraction avoidance not more than 2mm; After the pressure data is returned to the safe pressure range and the deformation data is returned to the standard deformation threshold, the control unit controls the driving adjustment module to execute the driving adjustment instruction adapting to the current state based on the pressure data and the deformation data acquired in real time.
4. 4. The flexible adaptive soft package lithium battery independent grabbing pressure feedback system according to claim 1, wherein the data storage module supports manual updating or automatic iteration of standard deformation threshold values, safety pressure ranges and driving reference parameters of soft package batteries of different types, and adaptation of soft package batteries with different specifications and packaging tightness or battery cell distribution uniformity can be achieved through parameter updating.
5. 5. The flexible adaptive soft package lithium battery independent grabbing pressure feedback system according to claim 1, wherein the pressure acquisition module comprises distributed pressure sensors, the distributed pressure sensors are uniformly arranged on the whole area of the clamping surface of the soft package battery, and the distance between the acquisition points of the sensors does not exceed a preset distance threshold value, so that the pressure data of multiple points of the clamping surface can be synchronously and comprehensively acquired.
6. 6. The flexible adaptive soft package lithium battery independent grabbing pressure feedback system according to claim 1, wherein the detection precision of the deformation detection module is not lower than a preset precision threshold, and the detection probes are distributed corresponding to corners and middle areas of the soft package battery and are used for accurately capturing micro deformation of each key position on the surface of the soft package battery to form corresponding deformation data.
7. 7. The flexible adaptive soft-package lithium battery independent grabbing pressure feedback system according to claim 1, wherein when the control unit processes pressure data and deformation data through a preset fusion algorithm, the fusion algorithm is constructed based on the matching degree of the pressure data and a safety pressure range and the change rate of the deformation data, so that collaborative analysis of pressure-deformation dual signals is realized.
8. 8. The flexible adaptive soft-pack lithium battery independent grabbing pressure feedback system according to claim 1, wherein when the pressure data is close to a preset proportion threshold value of a safety pressure range, the driving adjustment command controls the driving adjustment module to reduce the clamping speed to a preset proportion of a reference speed corresponding to a driving reference parameter, and increases the stroke buffering amplitude synchronously, so that rigid impact between the clamping surface and the soft-pack battery is avoided.
9. 9. The flexible adaptive soft package lithium battery independent grabbing pressure feedback system according to claim 1, wherein when the deformation data has an ascending trend not lower than a preset amplitude, the driving adjustment command controls the driving adjustment module to finely adjust the clamping pressure with a preset pressure adjustment precision, and synchronously slow down the stroke adjustment rate, and the irreversible bulge is restrained reversely through the deformation trend.
10. 10. The flexible adaptive soft package lithium battery independent grabbing pressure feedback system according to claim 1, wherein the pressure acquisition module, the deformation detection module, the control unit and the driving adjustment module are integrally arranged above and beside a clamping assembly of the automatic production line grabbing mechanism.

Description

Independent grabbing pressure feedback system of flexible adaptive soft-package lithium battery Technical Field The invention belongs to the technical field of lithium battery production equipment, and particularly relates to an independent grabbing pressure feedback system of a flexible adaptive soft package lithium battery. Background With the rapid development of new energy automobiles and energy storage industry, the soft-package lithium battery is widely applied due to the advantages of high energy density, good safety performance and the like. In the production and manufacturing process of the soft-package lithium battery, grabbing operation is one of key process links, and quality and production efficiency of the battery are directly affected. Because the soft package lithium battery adopts the plastic-aluminum film package, the structure is relatively soft, and the problems of deformation, bulge, even damage and the like are easy to occur due to improper pressure control in the grabbing process of an automatic production line, an accurate pressure feedback control system is required to ensure the safety and the reliability of the grabbing process. CN213905436U discloses a soft-package lithium battery variable-pressure formation system, which comprises a formation device, a data acquisition card, a main control console and a programmable controller, wherein the formation device comprises a support plate, a vertical mounting plate with the bottom end fixed on the support plate, an electric cylinder fixed on the vertical mounting plate, a plurality of cell clamping plates arranged on the support plate and arranged in parallel with each other, a spring connected between two adjacent cell clamping plates, and a pressure sensor, one end of the cell clamping plates is adjacent to the electric cylinder, the other end is far away from the electric cylinder, wherein the pressure sensor is fixed on one cell clamping plate adjacent to the electric cylinder, the end of a piston rod of the electric cylinder is fixedly connected with the pressure sensor, the bottom end of one cell clamping plate far away from the electric cylinder is fixed on the support plate, and the bottom ends of the other cell clamping plates are all supported on the support plate; The battery cell is arranged on the supporting plate and between two adjacent battery cell clamping plates in the formation process of the soft package lithium battery, the data acquisition card is connected with the battery cell arranged on the formation device for acquiring voltage data, the output end of the data acquisition card is connected with the main control console for transmitting the acquired voltage data to the main control console, meanwhile, the pressure sensor is connected with the main control console for transmitting the pressure data of the electric cylinder acquired in real time to the main control console, the main control console is connected with the programmable controller, and the main control console sends control instructions to the programmable controller according to the voltage data and the pressure data, and the programmable controller is connected with the electric cylinder for controlling the electric cylinder to change the clamping force born by two sides of the battery cell through the electric cylinder. CN118936719a proposes a soft-pack battery internal pressure measurement device, comprising a device main body, a sensor, a pressure sensor and a pressure sensor, wherein one end of the device main body is provided with a planar pressure head; the data acquisition processing module is arranged on the equipment main body and connected with the sensor, and is configured to acquire and process the data of the sensor so as to acquire the internal pressure of the soft package battery. The measuring equipment has the characteristics of simple structure, convenient use and high test precision, and can measure the internal pressure of various soft-package batteries. The prior art still has obvious defects in the grabbing process of the soft package lithium battery. First, existing pressure control systems lack dynamic linkage mechanisms of pressure and drive mechanisms, and are not adequate and safe. In the prior art, single pressure adjustment or force-position sectional switching control is adopted, parameters such as the clamping speed, the stroke buffering amplitude and the like of a driving mechanism are fixed, and only the pressure value can be passively adjusted, so that an aluminum plastic film is easily scratched due to overlarge impact force in the moment of grabbing contact, and the battery bulge is caused due to mismatching of pressure and driving state in continuous clamping. Secondly, the adaptation capability of the existing system is limited and limited to the adaptation of the dimension specification, the adaptation of pressure-driving parameters cannot be realized according to individual differences such as the packaging