Pressure detection and adjustment method, system and device for multi-level formation cabinet

Abstract

The invention particularly relates to a pressure detection and adjustment method, system and device for a multi-level formation cabinet, and the method comprises the steps: carrying out the feedback adjustment of a pressure applied to a battery cell for formation in each level of battery cell formation layer through a first compensation force, so as to enable the pressure applied to each battery cell in each level to tend to be a preset loading pressure; furthermore, the pressurization stability of any battery cell is ensured, and the gas generated in the formation process can be continuously and stably discharged in the formation process of the soft package lithium battery, so that the capacity of the soft package lithium battery tends to the upper limit after the formation of the soft package lithium battery is completed. Due to the use of the method, the pushing and pushing of the battery placement rack become possible, so that an operator can carry out battery cell loading and unloading outside without working at high temperature, and the method has the advantages of convenience in operation of the operator and controllable loading pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production detection, and in particular to a pressure detection and regulation method, system and device for a multi-level formation cabinet. Background Art

[0002] Battery formation is an indispensable part of lithium battery preparation. It mainly generates a solid electrolyte interface (SEI) film on the negative electrode side of the lithium battery through the first charge of the lithium battery. This film can prevent lithium ions from further reacting, resulting in the loss of active lithium used to generate current, thereby ensuring the battery capacity and service life of the lithium battery. The formation cabinet is an important equipment for lithium battery formation.

[0003] In order to increase the capacity of lithium batteries in the prior art, the formation cabinet often performs pressurization and heating operations when forming the batteries. Especially for soft-pack lithium batteries, in order to avoid the problem of lithium battery electrode dead zone caused by the bubbles generated by the soft-pack lithium batteries during the formation, the soft-pack lithium batteries often need to be pressurized during the formation process. Taking into account the above formation requirements, the existing formation cabinets often face the following problems:

[0004] When soft-pack lithium batteries are manually loaded and unloaded, they are often affected by the high temperature of the batteries and the heating of the chamber, which will endanger the health of the workers in the long run. If the lithium batteries are loaded and unloaded externally and then pushed in and out, the pressure during the pressurization of the lithium batteries will be uncontrollable, which in turn makes the technical problem of the existing technology that the high temperature of loading and unloading is difficult to reconcile with the stability of pressure loading. Summary of the invention

[0005] In view of the technical problems in the prior art that manual loading and unloading of lithium batteries is easily affected by high temperature or external loading and unloading of lithium batteries leads to uncontrollable pressure loading, the present invention provides a pressure detection and adjustment method, system and device for a multi-level formation cabinet, which has at least the advantages of controllable pressure loading size, easy operation and applicability to assembly line operations.

[0006] In a first aspect, the present invention provides a method for detecting and adjusting pressure of a multi-level forming cabinet, comprising the following steps:

[0007] S10, obtaining, by a first pressure sensor, the pressure exerted on the battery cells being formed in the battery cell formation layer of each layer of the multi-layer battery placement rack;

[0008] S20, providing a first compensation force to the pressure plates at different levels for loading the applied pressure according to the difference between the applied pressure and the preset loading pressure;

[0009] S30, taking time t as a cycle period, repeatedly executing steps S10-S20.

[0010] Specifically, one of the main concepts of the present invention is to use the first compensation force to feedback-regulate the applied pressure on the battery cells being formed in the battery cell formation layer of each level, so that the applied pressure on each battery cell in each level converges to the preset loading pressure, thereby ensuring the pressurization stability of any battery cell, ensuring that the soft-pack lithium battery can continuously and stably discharge the gas generated during the formation process, so that the capacity of the soft-pack lithium battery after the formation is completed tends to its upper limit. Due to the use of the above method, it will be possible to push out the battery placement rack, so that the operator can load and unload the battery cells in the outside without having to work at high temperatures.

[0011] It is worth understanding that although the method provided by the present invention is mainly aimed at battery formation cabinets, in the prior art, the formation and capacity division of lithium batteries are often performed in one go, so the present invention is also applicable to lithium battery formation and capacity division cabinets.

[0012] Optionally, the first compensation force is achieved by means of an electromagnet, a pressurizer, etc.

[0013] Specifically, the difference between the applied pressure and the preset loading pressure is positive or negative, and the electromagnet can provide attractive force or repulsive force by changing the polarity, thereby having the compatibility provided by the first compensation force, so that the positive first compensation force or the reverse first compensation force can be provided only by changing the polarity.

[0014] The preset loading pressure is the pressure that needs to be applied to a soft-pack lithium battery of a certain specification and model during formation.

[0015] Furthermore, before step S10, the method further includes step S01:

[0016] S01. Acquire the ambient gravity through a second pressure sensor disposed between the battery cell formation layers at different levels, and provide a second compensation force to the pressure plates at different levels in advance based on the ambient gravity of the corresponding layer and the gravity correspondence between the battery cell formation layer and the pressure plate at the corresponding layer.

[0017] Specifically, another concept of the present invention is to avoid uneven initial loading force on each level in a multi-layer battery placement rack by setting a second compensation force, thereby solving the technical problem that the battery cells are easily damaged. Since the present invention uses a multi-layer battery placement rack to place battery cells in order to increase the number of battery cells placed at one time, this setting method will cause the battery cell formation layers in different levels to be affected by superimposed gravity. In order to ensure the uniformity of pressure on the pressure plate in each layer of battery cell formation layer, the present invention compensates for the environmental gravity through a second compensation force to avoid excessive pressure on the battery cells in the battery cell formation layer on the lower layer of the battery placement rack, which may cause the aluminum-plastic film of the battery cells to be damaged or the hierarchical structure to be destroyed.

[0018] Optionally, the second compensation force and the first compensation force are provided by the same mechanism.

[0019] In a second aspect, the present invention provides a pressure detection and regulation system for a multi-level chemical forming cabinet, which is used to implement a pressure detection and regulation method for a multi-level chemical forming cabinet as provided in any embodiment of the first aspect, comprising: a control component and a first pressure detection component, a pressure applying component, a feedback regulation component and a heating component electrically connected to the control component respectively;

[0020] The first pressure detection assembly includes a plurality of first pressure sensors for acquiring the applied pressure;

[0021] The pressure-applying component is used to apply pressure;

[0022] The feedback adjustment component is used to provide compensation force;

[0023] The heating component is used to load the thermal environment.

[0024] Furthermore, the pressure detection and regulation system of the multi-level chemical forming cabinet provided by the present invention includes: a second pressure detection component, and the second pressure detection component includes a plurality of second pressure sensors for acquiring environmental gravity.

[0025] In a third aspect, the present invention provides a pressure detection and adjustment device for a multi-level chemical forming cabinet, which is used to implement a pressure detection and adjustment method for a multi-level chemical forming cabinet as provided in any embodiment of the first aspect or a pressure detection and adjustment system for a multi-level chemical forming cabinet as provided in any embodiment of the second aspect, including:

[0026] A cabinet, the cabinet comprising a chamber for accommodating a battery placement rack, a pressure component disposed on one end of the chamber, and a charging interface and a heating component disposed on an inner wall of the chamber;

[0027] The battery placement rack comprises multiple layers of battery cell formation layers, and any layer of the battery cell formation layer is used to place multiple battery cells;

[0028] The pressure assembly includes a main pressure head, a pressure mechanism that provides driving force for the main pressure head, and a driving member that is arranged on both sides of the battery placement rack and connected to the main pressure head;

[0029] The driving member includes a slide rail arranged on the main pressure head, a driving rod connected to the slide rail, and a plurality of pressing plates arranged on the driving rod; the number of the pressing blocks corresponds to the number of layers of the battery cell formation layer, and the battery cell formation layer of the corresponding level is inserted into the pressing blocks under the movement of the slide rail;

[0030] A first pressure detection assembly, comprising a plurality of first pressure sensors, wherein the first pressure sensors are arranged at the contact point between the pressing plate and the battery cell after placement;

[0031] The feedback adjustment component includes a plurality of electromagnetic devices, any of which includes a first electromagnet arranged on the pressing plate and a second electromagnet arranged on the battery core formation layer; the first electromagnet and the second electromagnet have an attraction function or a repulsion function through electrical control;

[0032] A control component is electrically connected to the first pressure detection component, the pressure application component, the feedback adjustment component and the heating component respectively.

[0033] Specifically, the above device is a specific implementation of the method or system provided by the present invention. The heating component and the pressure component are used for heating and pressurizing during the formation process of the lithium battery. The charging interface is used for the first charging of the lithium battery and the charging capacity division. Among them, the first pressure detection component and the feedback adjustment component are used to realize the detection of the applied pressure and the provision of the first compensation force.

[0034] Furthermore, the battery rack is arranged in a detachable manner, and any of the battery cell formation layers includes a plurality of electrode clips adapted to the number of battery cells and a female connector for supplying power to the electrode clips, and the female connector is detachably connected to the charging port.

[0035] Furthermore, the battery cell formation layer includes a layer plate provided with a plurality of placement positions, support legs provided around one end surface of the layer plate, and a fixing groove provided on the other end surface thereof and adapted to the size of the support legs;

[0036] The battery cell formation layer mentioned above is stacked in sequence in the fixing groove of the next battery cell formation layer through the supporting legs.

[0037] Specifically, another concept of the present invention is to configure each battery cell formation layer as a detachable structure, so that it is suitable for assembly line operation and the degree of automation of lithium battery formation is improved.

[0038] Furthermore, the pressure detection and adjustment device includes a second pressure detection component, the second pressure detection component includes a plurality of second pressure sensors, and the second pressure sensors are arranged at the contact point between the supporting leg and the fixing groove.

[0039] Optionally, the pressing plate includes a first pressing block and a second pressing block;

[0040] The first pressing block and the second pressing block are respectively connected to two sides of the battery placement rack, and their joints that move toward each other are interlocked with each other.

[0041] Optionally, the charging port includes a constant current charging function and a constant voltage charging function.

[0042] In summary, the present invention provides a method for detecting and adjusting the pressure of a multi-level forming cabinet, which has at least the following advantages:

[0043] 1. Use the first compensation force to feedback-regulate the applied pressure on the battery cells being formed in the battery cell formation layer of each level, so that the applied pressure on each battery cell in each level converges to the preset loading pressure, thereby ensuring the pressurization stability of any battery cell, and ensuring that the soft-pack lithium battery can continuously and stably discharge the gas generated during the formation process, so that the capacity of the soft-pack lithium battery after the formation is completed tends to its upper limit. Due to the use of the above method, it will be possible to push and push out the battery placement rack, so that the operator can load and unload the battery cells in the outside without having to work at high temperature, so that the present invention has the advantages of convenient operation for the staff and controllable loading pressure;

[0044] 2. The second compensation force is set to avoid uneven initial loading force on each layer in a multi-layer battery placement rack, thereby solving the technical problem that battery cells are easily damaged. Since the present invention adopts a multi-layer battery placement rack to place battery cells in order to increase the number of battery cells placed at one time, this setting method will cause the battery cell formation layers in different layers to be affected by superimposed gravity. In order to ensure the uniformity of pressure on the pressure plate in each layer of battery cell formation layer, the present invention compensates for the environmental gravity through the second compensation force to avoid excessive pressure on the battery cells in the battery cell formation layer on the lower layer of the battery placement rack, which may cause damage to the aluminum-plastic film of the battery cells or damage to the layered structure, so that the present invention has the advantages of safety and reliability;

[0045] 3. Each battery cell formation layer is set to a detachable structure, so that it is suitable for assembly line operation and the degree of automation of lithium battery formation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0047] Figure 1 , a schematic diagram of a flow chart of a pressure detection and regulation method of a multi-level forming cabinet provided by an embodiment of the present invention;

[0048] Figure 2 , a schematic flow chart of a pressure detection and regulation method of a multi-level forming cabinet provided by another embodiment of the present invention;

[0049] Figure 3 , a schematic diagram of the composition of a pressure detection and regulation system for a multi-level forming cabinet provided by an embodiment of the present invention;

[0050] Figure 4 , a front view structural diagram of a pressure detection and regulation device for a multi-level forming cabinet provided in one embodiment of the present invention;

[0051] Figure 5 , a partial cross-sectional view of a single battery cell formation layer provided by another embodiment of the present invention;

[0052] Figure 6 , a top view of a single battery cell formation layer provided by another embodiment of the present invention;

[0053] 1. Cabinet; 2. Pressure-applying assembly; 3. Battery rack; 4. Battery cell; 5. First pressure detection assembly; 6. Feedback adjustment assembly; 7. Mobile chassis; 11. Chamber; 21. Main pressure head; 22. Pressure mechanism; 23. Driving member; 31. Battery cell formation layer; 51. First pressure sensor; 61. Electromagnetic device; 71. Bracket; 72. Support steel; 81. Second pressure sensor; 111. Inner wall; 231. Slide rail; 232. Driving rod; 233. Pressing plate; 311. Shelf; 312. Supporting leg; 313. Fixing groove; 611. First electromagnet; 612. Second electromagnet; 721. Accommodating groove; 311a. Placement position; 311b. Electrode clamp; 311c. Female connector. DETAILED DESCRIPTION

[0054] The following is combined with Figures 1 to 6 , the present invention is described in detail.

[0055] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0056] The present invention aims to adjust the applied pressure during the formation process of soft-pack lithium batteries by means of pressure detection and adjustment, so that the present invention can realize the loading and unloading of the battery placement rack by a push-pull method, making it convenient for operators to clamp the soft-pack lithium batteries in the outside world.

[0057] In order to explain the technical concept of the present invention, please refer to Figure 1The figure is a schematic flow chart of a pressure detection and regulation method of a multi-level forming cabinet provided by an embodiment of the present invention.

[0058] Specifically, the pressure detection and adjustment method provided by the present invention includes at least steps S10 to S30. First, in step S10, the applied pressure of the battery cells in each layer of the battery cell formation layer in the multi-layer battery placement rack is obtained through the first pressure sensor. Then, in step S20, according to the difference between the applied pressure and the preset loading pressure, the first compensation force is provided to the pressure plates used to load the applied pressure in different levels. At this point, the pressure detection and feedback adjustment of the battery placement rack can be completed. Its working principle is mainly that when the soft-pack battery adopts the multi-layer battery placement rack to pull and load materials, the battery placement rack needs to be pulled out or pushed in from the cabinet according to the needs of loading and unloading. When pulling out, the operator places the unformed battery cell on the battery placement rack or takes the battery cell after the formation is completed from the battery placement rack to avoid the high temperature from affecting the health of the operator, and the push-in type is used to load the soft-pack battery cell with pressure to complete the formation of the soft-pack battery cell under the pressurized state. This loading and unloading method will cause two major problems. One is how to pressurize the battery cell formation layers of each level at the same time, and the other is how to ensure the consistency of pressurization of each battery cell in each level of the battery cell formation layer when the position of each push is uncertain. In order to solve the above technical problems, the present invention realizes the uniformity of pressurization by setting a pressure plate at each level, and then uses the first pressure sensor set at each level to obtain the applied pressure on the battery cells being formed in the battery cell formation layer of the corresponding level, and then provides a differentiated first compensation force for the pressure plate in each layer of the battery cell formation layer according to the difference between the applied pressure and the preset loading pressure, so as to ensure the consistency of the applied pressure on the battery cells being formed in each level.

[0059] Furthermore, the present invention also repeats steps S10-S20 with time t as the cycle period through S30. Among them, the applied pressure may fluctuate over time or be affected by the gas pressure, which will cause the applied pressure to be partially offset. The periodic pressure regulation will ensure that the applied pressure remains basically stable during the formation cycle. It is worth understanding that due to the packaging process, the soft-pack battery will produce gas during the formation process. The loading of applied pressure is mainly used to remove the gas to avoid dead zones in the electrode, which leads to a decrease in the battery capacity.

[0060] Optionally, in step S30, before repeatedly executing steps S10-S20, step S31 is further included to adjust the preset loading pressure according to the change of gas pressure to ensure that the gas generated during the formation process is fully discharged, that is, the cycle is performed with S10-S20-S31 as a cycle.

[0061] For further information, see Figure 2FIG. 1 is a flow chart of a method for detecting and adjusting pressure of a multi-level forming cabinet provided in another embodiment of the present invention.

[0062] Specifically, the pressure detection and adjustment method provided by the present invention also includes step S01, before step S10, of obtaining environmental gravity through a second pressure sensor set between the battery cell formation layers of different levels, and providing a second compensation force to the pressure plates in different levels in advance according to the size of the environmental gravity. Since the present invention adopts a detachable multi-layer battery placement rack, it will also cause the battery cell formation layers of each level to be pressurized by different pressure plates, but the pressure-applying mechanisms of each pressure plate are the same, which will cause the battery cell formation layers of each level to be affected by the superimposed pressure, and the environmental gravity of the battery cell formation layer closer to the lower layer is greater. In order to adjust the environmental gravity, this embodiment uses step S01 to provide a second compensation force in advance to offset the influence of environmental gravity. At this time, the step cycle of the present invention is S01-S10-S20-S10-S20-... or S01-S10-S20-S31-S10-S20-S31..., and step S01 only works at the beginning.

[0063] It is worth explaining that, since the battery placement rack is assembled by pushing and pulling, position changes are inevitable, which results in that although the same pressure is applied by the same main pressure head in combination with several pressure plates, due to the existence of environmental gravity and placement errors, the pressure plates of different levels will not apply the same applied pressure to the battery cell formation layers of different levels just right, which leads to the problem of uneven force in the battery cell formation layers of each level. In addition, since the battery cell formation layer of the present invention adopts a multi-layer splicing method to form a battery placement rack, each level will also cause a change in position when stacked, which will then cause the pressure applied by the pressure plates of each level to be differentiated.

[0064] Furthermore, the present invention provides a second compensation force based on the environmental gravity of the corresponding layer and the gravity relationship between the battery cell formation layer and the pressure plate of the corresponding layer to offset the influence of gravity factors and superposition factors, and eliminate the differences caused by the detachable and superposition methods of the battery placement rack. In one embodiment, the battery cell formation layer is set to n layers, which are recorded as 1, 2, 3, ..., n from top to bottom; the gravity of each battery cell formation layer from top to bottom is W D1 , W D2 , W D3 ,……,W Dk ,……,W Dn ; The weight of each laminate from top to bottom is W Y1 , W Y2 , W Y3 ,……,W Yk ,……,W Yn ; The environmental gravity data of the second pressure detection component of each layer from top to bottom is WC1 , W C2 , W C3 ,……,W Ck ,……,W Cn For example, taking the kth layer as an example, the second compensation force = a*W Ck *(W Yk / W Dk ), where a is the correction coefficient, obtained based on actual tests.

[0065] In some embodiments, the present invention also provides a pressure detection and regulation system for a multi-level forming cabinet, see Figure 3 FIG. 1 is a schematic diagram showing the composition of a pressure detection and regulation system of a multi-level forming cabinet provided in one embodiment of the present invention.

[0066] Specifically, the system provided by the present invention mainly includes two large heating modules, namely the heating component on the left side of the control component in the figure, which is used to provide a thermal environment for the soft-pack battery cells, and a pressurizing module, namely the pressure-applying component, the first pressure detection component, the feedback adjustment component and the second pressure detection component on the right side of the control component in the figure. Among them, the pressure-applying component is used to apply pressure to the battery cells in each level of the battery cell formation layer; the first pressure detection component is used to respectively detect the applied pressure on each battery cell in each level of the battery cell formation layer; the feedback adjustment component is used to provide the first compensation force or the second compensation force according to the situation; the second pressure detection component is used to respectively detect the interlayer environmental gravity between each level of the battery cell formation layer, and the above components are coordinated to achieve Figure 1 and Figure 2 The pressure detection and adjustment method provided in.

[0067] In some embodiments, the present invention also provides a matching pressure detection and adjustment device, see Figure 4 Shown is a front view of a pressure detection and regulation device of a multi-level forming cabinet provided by an embodiment of the present invention.

[0068] Specifically, the pressure detection and adjustment device provided by the present invention is mainly based on a cabinet 1, and the cabinet 1 includes a chamber 11, and the chamber 11 is used to accommodate the battery placement rack 3. Among them, the battery placement rack 3 is separately arranged from the cabinet 1, and has the functions of pulling out and pushing in. The cabinet 1 is a vertical square structure, which is constructed by a frame and includes four support columns for providing structural support for the pressure-applying component 2 on the upper end side; the inner wall 111 of the frame constitutes the chamber 11. In order to provide a thermal environment for the chamber 11, the inner wall 111 of the chamber 11 is provided with a heating component (not shown in the figure), and the heating component is preferably an electric heating wire, which is arranged around the chamber 11. Furthermore, the pressure assembly 2 includes a main pressure head 21, a pressure mechanism 22 and a driving member 23. The main pressure head 21 is arranged in the chamber 11, the pressure mechanism 22 is arranged on the outer wall of the cabinet 1 outside the chamber 11, and is used to provide pressure for the main pressure head 21, and the driving member 23 is arranged on the main pressure head 21 and is driven by the main pressure head 21. Among them, the driving member 23 includes a slide rail 231, a driving rod 232 and a pressure plate 233. The slide rail 231 is arranged on the inner wall of the main pressure head 21, and the slide rail 231 is arranged at one end of the driving rod 232 to move along the pressure direction relying on the slide rail 231. The driving rod 232 is provided with a plurality of pressure plates 233 at intervals, and each pressure plate 233 corresponds to each battery cell formation layer 31, and is used to provide pressure to the battery cells 4 in the corresponding battery cell formation layer 31. Since the battery rack 3 adopts a pull-out and push-in design, in order to ensure that the pressure plate 233 of the pressure assembly 2 can apply pressure to the battery cells 4 in each level of the battery cell formation layer 31, the pressure plate 233 is displaced under the sliding of the driving rod 232, one displacement mode is forward displacement (based on the front view), and the other displacement mode is left and right displacement (still based on the front view). Considering the design size of the cabinet 1 and the battery cell formation layer 31, Figure 4 Take the positive displacement as an example. When the battery rack 3 is not placed, the pressure plate 233 is removed by the slide rail 231. After the battery rack 3 is placed in the chamber 11 of the cabinet 1, after the position is confirmed to be correct, each pressure plate 233 is moved into the level of the corresponding battery cell formation layer 31 by the slide rail 231, so that the center of the pressure plate 233 is opposite to the center of the battery cell formation layer 31, and then the main pressure head 21 is driven downward, so as to realize the pressure on the battery cells 4 in each battery cell formation layer 31.

[0069] It is worth understanding that, in order to facilitate the extraction and insertion of the battery rack 3, the present invention further provides a mobile chassis 7, which includes a bracket 71 and a support steel 72. The bracket 71 is provided with a receiving groove 721 on the end surface facing the battery rack 3, and the receiving groove 721 is used to receive the bottommost battery cell formation layer 31. The support steel 72 is provided on the other end surface of the bracket 71 for forklift to pick up.

[0070] In order to explain the split structure of the battery placement rack 3 and the adjustment method of the feedback adjustment component 6, please refer to Figure 5 FIG. 1 is a partial cross-sectional view of a single cell formation layer 31 provided in accordance with another embodiment of the present invention.

[0071] Specifically, each layer of the battery cell formation layer 31 includes a layer plate 311, a support leg 312, and a fixing groove 313. The support leg 312 is arranged around one end of the layer plate 311. The support leg 312 completes the clamping and fixing between the upper and lower layers through the fixing groove 313, so that the battery cell formation layer 31 can be stacked by splicing, and any first pressure sensor 51 of the first pressure detection component 5 is arranged on the pressure plate 233, which is used to detect the contact pressure between the pressure plate 233 and the battery cell 4, and any second pressure sensor 81 of the second pressure detection component is arranged between the support leg 312 and the fixing groove 313, which is used to detect the interlayer pressure of each battery cell formation layer 31. Among them, the first pressure detection component 5 is provided with several layers of first pressure sensors 51 based on the pressure plate 233, and each layer of first pressure sensors 51 can be provided with multiple according to the number of battery cells 4. Similarly, the second pressure detection assembly is provided with several layers of second pressure sensors 81 based on the support legs 312 or the fixing slots 313, and each layer of second pressure sensors 81 can be provided with multiple ones according to the number of support legs 312 or the fixing slots 313. Among them, an electromagnetic device 61 is provided at the gap between each battery cell 4, and the electromagnetic device 61 includes a first electromagnet 611 provided on the pressure plate 233 and a second electromagnet 612 provided on the layer plate 311. The magnitude of the attraction or repulsion between the first electromagnet 611 and the second electromagnet 612 can be adjusted according to the difference between the applied pressure and the preset loading pressure. If the applied pressure minus the preset loading pressure is positive, a repulsion is provided to make the applied pressure converge to the preset loading pressure. If the applied pressure minus the preset loading pressure is negative, a suction is provided to make the applied pressure converge to the preset loading pressure.

[0072] For further information, see Figure 6 FIG. 1 is a top view of a single cell formation layer 31 provided in yet another embodiment of the present invention.

[0073] Specifically, each battery cell formation layer 31 is provided with a plurality of battery cell 4 placement positions 311a, the battery cell 4 is accommodated in the placement position 311a, and a charging voltage or current is provided through an electrode clamp 311b, each electrode clamp 311b is aggregated into a female connector 311c, and the female connector 311c is electrically connected to a charging connector (not shown in the figure) provided in the cabinet 1.

[0074] Therefore, the working principle of the present invention is as follows: before formation, the operator places the battery 4 on each battery formation layer 31, and then stacks each battery formation layer 31 in sequence to form a battery placement rack 3, and inserts the battery placement rack 3 into the chamber 11 of the cabinet 1 through the mobile chassis 7, and then starts the formation program of the control component, and the heating module and the pressurizing module start working. The heating module provides a thermal environment, and the pressurizing module drives the driving rod 232 through the slide rail 231 to insert the pressing plate 233 into each layer of the battery formation layer 31 ( Figure 5 At the same time, the second pressure detection component provides environmental gravity data, and the control component controls the feedback adjustment component 6 to provide a second compensation force. After everything is completed, the main pressure head 21 applies pressure downward, so that each pressure plate 233 presses the battery cell 4 ( Figure 5 The first pressure detection component 5 provides applied pressure data, and the control component controls the feedback adjustment component 6 to provide a first compensation force according to the difference between the applied pressure and the preset loading pressure. Thereafter, the first pressure detection component 5 performs applied pressure detection in a cycle t. Thus, the battery cell 4 is formed at the preset temperature and the preset loading pressure.

[0075] The present invention is described in detail above. The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A method for detecting and adjusting the pressure of a multi-level forming cabinet, characterized in that: The following steps are involved: S10, obtaining, by a first pressure sensor, the pressure exerted on the battery cells being formed in the battery cell formation layer of each layer of the multi-layer battery placement rack; S20, providing a first compensation force to the pressure plates at different levels for loading the applied pressure according to the difference between the applied pressure and the preset loading pressure; S30, taking time t as a cycle period, repeatedly executing steps S10-S20.

2. A method for detecting and adjusting pressure of a multi-level chemical forming cabinet as claimed in claim 1, characterized in that: Before step S10, the method further includes step S01: S01. Acquire the ambient gravity through a second pressure sensor disposed between the battery cell formation layers at different levels, and provide a second compensation force to the pressure plates at different levels in advance based on the ambient gravity of the corresponding layer and the gravity correspondence between the battery cell formation layer and the pressure plate at the corresponding layer.

3. A pressure detection and adjustment system for a multi-level chemical forming cabinet, used to implement the pressure detection and adjustment method for a multi-level chemical forming cabinet as claimed in claim 1, characterized in that: It comprises: a control component and a first pressure detection component, a pressure applying component, a feedback regulating component and a heating component which are electrically connected to the control component respectively; The first pressure detection assembly includes a plurality of first pressure sensors for acquiring the applied pressure; The pressure-applying component is used to apply pressure; The feedback adjustment component is used to provide compensation force; The heating component is used to load the thermal environment.

4. A pressure detection and regulation system for a multi-level chemical forming cabinet as claimed in claim 3, comprising: The second pressure detection component includes a plurality of second pressure sensors for acquiring environmental gravity.

5. A pressure detection and regulation device for a multi-level chemical forming cabinet, used to implement a pressure detection and regulation method for a multi-level chemical forming cabinet as claimed in claim 1 or a pressure detection and regulation system for a multi-level chemical forming cabinet as claimed in claim 3, characterized in that: include: A cabinet (1), the cabinet (1) comprising a chamber (11) for accommodating a battery placement rack (3), a pressure-applying assembly (2) arranged at one end of the chamber (11), and a charging interface and a heating assembly arranged on an inner wall (111) of the chamber (11); The battery placement rack (3) comprises multiple layers of the battery cell formation layer (31), and any layer of the battery cell formation layer (31) is used to place multiple battery cells (4); The pressure-applying assembly (2) comprises a main pressure head (21), a pressure mechanism (22) for providing driving force for the main pressure head (21), and a driving member (23) arranged on both sides of the battery placement rack (3) and connected to the main pressure head (21); The driving member (23) comprises a slide rail (231) arranged on the main pressure head (21), a driving rod (232) connected to the slide rail (231), and a plurality of pressing plates (233) arranged on the driving rod (232); the number of the pressing plates (233) corresponds to the number of layers of the battery cell formation layer (31), and the battery cell formation layer (31) of the corresponding level is inserted into the pressing plates (233) under the movement of the slide rail (231); A first pressure detection assembly (5), comprising a plurality of first pressure sensors (51), wherein the first pressure sensors (51) are arranged at the contact point between the pressure plate (233) and the battery cell (4) after placement; A feedback adjustment component (6) comprises a plurality of electromagnetic devices (61), wherein any of the electromagnetic devices (61) comprises a first electromagnet (611) arranged on the pressing plate (233) and a second electromagnet (612) arranged on the battery core formation layer (31); the first electromagnet (611) and the second electromagnet (612) have a mutual attraction function or a mutual repulsion function through electrical control; A control component, wherein the control component is electrically connected to the first pressure detection component (5), the pressure application component (2), the feedback adjustment component (6) and the heating component respectively.

6. A pressure detection and adjustment device for a multi-level chemical forming cabinet as claimed in claim 5, characterized in that: The battery placement rack (3) is arranged in a detachable manner, and any of the battery cell formation layers (31) includes a plurality of electrode clips (311b) adapted to the number of battery cells (4) and a female connector (311c) for supplying power to the electrode clips (311b), and the female connector (311c) is detachably connected to the charging interface.

7. A pressure detection and adjustment device for a multi-level chemical forming cabinet as claimed in claim 6, characterized in that: The battery cell formation layer (31) comprises a layer plate (311) provided with a plurality of placement positions (311a), support legs (312) arranged around one end surface of the layer plate (311), and a fixing groove (313) arranged on the other end surface thereof and adapted to the size of the support legs (312); The battery cell formation layer (31) mentioned above is stacked in sequence in the fixing groove (313) of the next battery cell formation layer (31) through the supporting legs (312).

8. A pressure detection and adjustment device for a multi-level chemical forming cabinet as claimed in claim 7, characterized in that: The pressure detection and adjustment device comprises a second pressure detection component, the second pressure detection component comprises a plurality of second pressure sensors (81), and the second pressure sensors (81) are arranged at the contact point between the support leg (312) and the fixing groove (313).

9. A pressure detection and adjustment device for a multi-level chemical forming cabinet as claimed in claim 5, characterized in that: The pressing plate (233) comprises a first pressing block and a second pressing block; The first pressing block and the second pressing block are respectively connected to two sides of the battery placement rack (3), and their joints that move toward each other are interlocked.

10. A pressure detection and adjustment device for a multi-level chemical forming cabinet as claimed in claim 5, characterized in that: The charging interface includes a constant current charging function and a constant voltage charging function.

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