Soft package battery cell, preparation method and device thereof and soft package battery cell system

Abstract

The invention discloses a soft package battery cell, a preparation method and device thereof and a soft package battery cell system, and relates to the technical field of batteries, the soft package battery cell comprises a negative pole piece, a diaphragm, a positive pole piece and a wireless temperature and pressure sensor; the diaphragm is positioned between the negative pole piece and the positive pole piece; and the wireless temperature and pressure sensor is positioned on the positive pole piece and / or the negative pole piece. For soft package battery cells prepared under different tools, universal hot-pressing process optimization is carried out, that is, thin-layer wireless temperature and pressure sensors are arranged on a positive pole piece and / or a negative pole piece in the centermost center of a JR, and the internal temperature and pressure of the JR are detected through the wireless temperature and pressure sensors, so that the internal hot-pressing effect and safety of the JR are improved; therefore, the off-line data of the battery cell is relatively better, and the electrochemical test result is also relatively more excellent.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a soft-pack battery cell, a preparation method and device thereof, and a soft-pack battery cell system. Background Art

[0002] The capacity and size of soft-pack batteries are easy to adjust, and the production process is simpler than that of aluminum shells and cylinders, so they are widely used in material screening and other aspects. In the preparation process of soft-pack batteries, hot pressing of bare cells (Jerry Roll, JR) is one of the important processes, and its effect will directly affect the connection between the diaphragm and the electrode, and indirectly affect the wettability of the electrolyte, K value, internal resistance and electrochemical properties of the cell.

[0003] At present, the existing hot pressing process for soft-pack batteries is to hot-press the soft-pack batteries by setting the temperature of the upper and lower clamping plates of the hot press, which cannot display the actual temperature inside the JR; and the pressure is also the pressure set by the hot press, which has a certain deviation from the actual pressure inside the JR, resulting in the hot pressing effect inside the JR cannot be guaranteed.

[0004] In order to improve the hot pressing effect, the existing hot pressing process of soft-pack battery cells uses relatively large pressure and temperature to hot press the soft-pack battery cells. Although the battery cell molding effect is better under high pressure and high temperature, the JR is harder, and it is easy to operate the subsequent process and the battery cell open circuit voltage test, it is easy to cause the diaphragm of the soft-pack battery cell to be closed and shrink, causing safety hazards and low safety. Summary of the invention

[0005] The present disclosure provides a soft-pack battery cell, a preparation method and device thereof, and a soft-pack battery cell system, the main purpose of which is to optimize the hot pressing process for the soft-pack battery cell prepared under specific tooling.

[0006] According to a first aspect of the present disclosure, a soft-pack battery cell is provided, comprising: a negative electrode sheet, a separator, a positive electrode sheet and a wireless temperature and pressure sensor;

[0007] The diaphragm is located between the negative electrode sheet and the positive electrode sheet;

[0008] The wireless temperature and pressure sensor is located on the positive electrode sheet and / or the negative electrode sheet.

[0009] Optionally, the positive electrode plate is any one of medium nickel, low nickel, high nickel ternary, lithium iron phosphate and lithium iron manganese phosphate;

[0010] The negative electrode is 90% graphite and 10% pre-lithium silicon oxide.

[0011] According to a second aspect of the present disclosure, a method for preparing a soft-pack battery cell is provided, comprising:

[0012] After establishing a connection with a wireless temperature and pressure sensor in a soft-pack battery cell, setting a target thermal pressure parameter, wherein the wireless temperature and pressure sensor is disposed on a positive electrode sheet and / or a negative electrode sheet of the soft-pack battery cell;

[0013] Receiving real-time thermal pressure parameters sent by the wireless temperature and pressure sensor;

[0014] When it is determined that the difference between the real-time hot-pressing parameter and the target hot-pressing parameter is less than a preset difference, hot-pressing the soft-pack battery cell is stopped.

[0015] Optionally, after receiving the real-time thermal pressure parameters sent by the wireless temperature and pressure sensor, the method further includes:

[0016] The received real-time hot pressing parameters are displayed.

[0017] Optionally, the real-time hot pressing parameters include real-time hot pressing temperature and real-time hot pressing pressure.

[0018] According to a third aspect of the present disclosure, a soft-pack battery system is provided, comprising: the soft-pack battery as described in the first aspect, and a controller,

[0019] The controller is connected to the wireless temperature and pressure sensor of the soft-pack battery cell, and is used to adjust the target thermal pressure parameters of the soft-pack battery cell according to the real-time thermal pressure parameters sent by the wireless temperature and pressure sensor.

[0020] Optionally, it also includes:

[0021] A display unit is connected to the wireless temperature and pressure sensor and is used to display the pressure and temperature received from the wireless temperature and pressure sensor.

[0022] In a fourth aspect, an embodiment of the present application further provides a device for preparing a soft-pack battery cell, comprising:

[0023] A setting unit, used to set target thermal pressure parameters after establishing a connection with a wireless temperature and pressure sensor in a soft-pack battery cell, wherein the wireless temperature and pressure sensor is arranged on a positive electrode sheet and / or a negative electrode sheet of the soft-pack battery cell;

[0024] A receiving unit, used for receiving real-time thermal pressure parameters sent by the wireless temperature and pressure sensor;

[0025] The control unit is used to stop the hot pressing of the soft-pack battery cell when it is determined that the difference between the real-time hot pressing parameter and the target hot pressing parameter is less than a preset difference.

[0026] Optionally, the device further comprises:

[0027] The display unit is used to display the received real-time thermal pressure parameters after the receiving unit receives the real-time thermal pressure parameters sent by the wireless temperature and pressure sensor.

[0028] Optionally, the real-time hot pressing parameters include real-time hot pressing temperature and real-time hot pressing pressure.

[0029] According to a fifth aspect of the present disclosure, there is provided an electronic device, including:

[0030] at least one processor; and

[0031] a memory communicatively connected to the at least one processor; wherein,

[0032] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method described in the second aspect.

[0033] According to a sixth aspect of the present disclosure, a non-transitory computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are used to enable the computer to execute the method described in the second aspect above.

[0034] According to a seventh aspect of the present disclosure, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements the method as described in the second aspect above.

[0035] The soft-pack battery cell, system, and preparation method and device provided by the present disclosure include: a negative electrode sheet, a diaphragm, a positive electrode sheet, and a wireless temperature and pressure sensor; the diaphragm is located between the negative electrode sheet and the positive electrode sheet; the wireless temperature and pressure sensor is located on the positive electrode sheet and / or the negative electrode sheet. For the soft-pack battery cells prepared under different tooling, a universal hot pressing process optimization is performed, that is, a thin-layer wireless temperature and pressure sensor is set on the positive electrode sheet and / or the negative electrode sheet at the center of the JR, and the temperature and pressure inside the JR are detected by the wireless temperature and pressure sensor, so as to improve the hot pressing effect and safety inside the JR, so that the battery cell offline data is relatively better and the electrochemical test results are relatively better.

[0036] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present disclosure.

[0038] Figure 1A schematic diagram of a soft-pack battery cell provided in an embodiment of the present disclosure;

[0039] Figure 2 A schematic diagram of a process for preparing a soft-pack battery cell provided in an embodiment of the present disclosure;

[0040] Figure 3 A schematic diagram of a process for preparing another soft-pack battery cell provided in an embodiment of the present disclosure;

[0041] Figure 4 A schematic diagram of the structure of a soft-pack battery system provided in an embodiment of the present disclosure;

[0042] Figure 5 A schematic structural diagram of a device for preparing a soft-pack battery cell provided in an embodiment of the present disclosure;

[0043] Figure 6 A schematic structural diagram of another device for preparing a soft-pack battery cell provided in an embodiment of the present disclosure;

[0044] Figure 7 A schematic block diagram of an exemplary electronic device provided for an embodiment of the present disclosure. DETAILED DESCRIPTION

[0045] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0046] The following describes the soft-pack battery cell, the preparation method and device thereof, and the soft-pack battery cell system according to the embodiments of the present disclosure with reference to the accompanying drawings.

[0047] Figure 1 Schematic diagram of a soft-pack battery cell provided by an embodiment of the present disclosure. Figure 1 As shown, including:

[0048] Negative electrode sheet 1, diaphragm 2, positive electrode sheet 3 and wireless temperature and pressure sensor 4;

[0049] The separator 2 is located between the negative electrode plate 1 and the positive electrode plate 3;

[0050] The wireless temperature and pressure sensor 4 is located on the positive electrode sheet 3 and / or the negative electrode sheet 1 .

[0051] In practical applications, the center of the bare cell (Jerry Roll, JR) is the positive electrode sheet 3, the diaphragm 2 and the negative electrode sheet 1, and a thin layer of wireless temperature and pressure sensor 4 covering the positive electrode sheet 3 and / or the negative electrode sheet 1 is added to form JR.

[0052] It should be noted that Figure 1 The wireless temperature and pressure sensor 4 shown is covered on the negative electrode 1, and includes a total of 5 sensors. This description does not limit the specific position of the wireless temperature and pressure sensor 4, nor does it specifically limit the number of sensors in the wireless temperature and pressure sensor 4. For example, it can be 1 or 5, and the number can be flexibly increased or decreased according to the requirements of cost and accuracy. The wireless temperature and pressure sensor 4 can also be covered on the positive electrode 3, or on the positive electrode 3 and the negative electrode 1 at the same time, and the number of wireless temperature and pressure sensors 4 is not specifically limited.

[0053] Put JR into the hot pressing equipment for hot pressing, one at a time, the temperature range is 50-90℃, the pressure converted to a single JR pressure is 1-5Mpa, the time is 30s-120s. Then complete the post-process flow in sequence, including but not limited to: voltage test (Hipot), aluminum-plastic film sealing, high-temperature baking, liquid injection, high-temperature immersion, formation, battery cell vacuum sealing (Degas), aging, capacity division, battery cell open circuit voltage test (Open Circuit Voltage, OCV), after the battery is offline, send it for capacity measurement, direct current resistance (Directive Current Resistance, DCR), 45℃ cycle and 60℃ storage.

[0054] In practical applications, considering the cost and the open circuit voltage test of the battery cell, only one thin-layer wireless temperature and pressure sensor 4 is added to each batch of JR. Alternatively, without considering the cost and the open circuit voltage test of the battery cell, multiple thin-layer wireless temperature and pressure sensors 4 can be added to each JR. Specifically, the embodiments of the present application do not limit this.

[0055] The soft-pack battery cell provided by the present disclosure includes: a negative electrode sheet, a diaphragm, a positive electrode sheet and a wireless temperature and pressure sensor; the diaphragm is located between the negative electrode sheet and the positive electrode sheet; the wireless temperature and pressure sensor is located on the positive electrode sheet and / or the negative electrode sheet. For the soft-pack battery cells prepared under different tooling, a universal hot pressing process optimization is performed, that is, a thin-layer wireless temperature and pressure sensor is set on the positive electrode sheet and / or the negative electrode sheet at the center of the JR, and the temperature and pressure inside the JR are detected by the wireless temperature and pressure sensor, so as to improve the hot pressing effect and safety inside the JR, so that the battery cell offline data is relatively better and the electrochemical test results are relatively better.

[0056] In the embodiment of the present application, the negative electrode sheet 1, the separator 2, and the positive electrode sheet 3 are stacked in the order of one. The positive electrode sheet is any one of medium nickel, low nickel, high nickel ternary, lithium iron phosphate, and lithium manganese iron phosphate; the negative electrode sheet is 90% graphite and 10% pre-lithium silicon oxide.

[0057] Example 1: Take 144102 tooling as an example to prepare a 10Ah soft-pack battery cell. The positive electrode is a high-nickel ternary, and the negative electrode 1 is graphite (90%) and pre-lithium silicon oxide (10%). When stacking, add a thin layer of wireless temperature and pressure sensor 4 and set the hot pressing parameters to 70°C, 3Mpa, and 60s. Wireless temperature and pressure sensor 4 (such as Figure 1 When the temperature of the 5 sensors included in the system is displayed as the set temperature ±1°C and the pressure is displayed as the set pressure ±0.2MPa, reaching the preset standard, hot pressing can begin.

[0058] Example 2, Example 3:

[0059] The temperatures are 50 and 90°C respectively, and the rest are the same as in Example 1. Example 4 and Example 5:

[0060] The pressures are 1 and 5 MPa respectively, and the rest are the same as Example 1. Example 6, Example 7, Example 8:

[0061] The time is 30, 90, and 120 seconds respectively, and the rest is the same as Example 1. Comparative Example 1 and Comparative Example 2:

[0062] The temperatures are 40 and 100° C. respectively, and the rest are the same as in Example 1.

[0063] Comparative Example 3, Comparative Example 4:

[0064] The pressures are 0.5 and 5.5 Mpa respectively, and the rest are the same as Example 1. Comparative Example 5 and Comparative Example 6:

[0065] The time is 20 and 130 seconds respectively, and the rest is the same as Example 1. The data of all examples and comparative examples are shown in Table 1 below:

[0066] Table 1

[0067]

[0068]

[0069] By comparing the above examples and comparative examples, it can be seen that the soft-pack battery provided in the embodiment of the present application achieves relatively superior battery cell offline data (diaphragm porosity, liquid loss, K value and internal resistance) and electrochemical performance (capacity, DCR, cycle and storage) of the 144102 tooling 10Ah soft-pack battery.

[0070] The present application also provides a method for preparing a soft-pack battery cell. Figure 2 As shown, the method is applied to a hot pressing device, comprising:

[0071] Step 101, after establishing a connection with a wireless temperature and pressure sensor in a soft-pack battery cell, setting a target thermal pressure parameter, wherein the wireless temperature and pressure sensor is arranged on a positive electrode sheet and / or a negative electrode sheet of the soft-pack battery cell;

[0072] After the hot pressing equipment establishes a communication connection with the wireless temperature and pressure sensor in the soft-pack battery cell wirelessly, the target hot pressing parameters are set. The target hot pressing parameters include target temperature, target pressure, and hot pressing time. For example, the target hot pressing parameters are set to a target temperature of 70°C, a target pressure of 3Mpa, and a hot pressing time of 60s, or a target temperature of 50°C, a target pressure of 3Mpa, and a hot pressing time of 60s. Furthermore, the target temperature is 70°C, the target pressure is 5Mpa, and the hot pressing time is 60s, the target temperature is 90°C, the target pressure is 5.5Mpa, and the hot pressing time is 90s. Specifically, the target hot pressing parameters are not limited in the embodiments of the present application.

[0073] Step 102, receiving real-time thermal pressure parameters sent by the wireless temperature and pressure sensor;

[0074] Put JR into the hot pressing equipment for hot pressing, and receive the real-time hot pressing parameters sent by the wireless temperature and pressure sensor in real time, the purpose of which is to be able to detect the actual real-time hot pressing parameters inside the bare battery JR in real time. In the embodiment of the present application, the real-time hot pressing parameters include real-time hot pressing temperature and real-time hot pressing pressure.

[0075] Step 103 , when it is determined that the difference between the real-time hot pressing parameter and the target hot pressing parameter is less than a preset difference, stop hot pressing the soft-pack battery cell.

[0076] As an implementation method, when controlling to stop hot pressing of soft-pack battery cells, the stopping condition may be determining that the difference between the real-time hot pressing parameter and the target hot pressing parameter is less than a preset difference; as another implementation method, when controlling to stop hot pressing of soft-pack battery cells, the stopping condition may also be whether the real-time hot pressing parameter reaches the target hot pressing parameter. Specifically, the embodiments of the present application do not limit this.

[0077] The preparation method of the soft-pack battery cell provided by the present invention sets the target hot-pressing parameters after establishing a connection with the wireless temperature and pressure sensor in the soft-pack battery cell; receives the real-time hot-pressing parameters sent by the wireless temperature and pressure sensor; and stops hot-pressing the soft-pack battery cell when it is determined that the difference between the real-time hot-pressing parameters and the target hot-pressing parameters is less than the preset difference. For the soft-pack battery cells prepared under different tooling, a universal hot-pressing process optimization is performed, that is, a thin-layer wireless temperature and pressure sensor is set on the positive electrode plate and / or the negative electrode plate at the center of the JR, and the internal temperature and pressure of the JR are detected by the wireless temperature and pressure sensor, so as to improve the hot-pressing effect and safety inside the JR, so that the battery cell offline data is relatively better and the electrochemical test results are relatively more excellent.

[0078] In passing Figure 2 After the hot pressing is completed in the manner shown, the hot pressing of the soft-pack battery cell is stopped, and then the hot-pressed soft-pack battery cell is subjected to a withstand voltage test, aluminum-plastic film sealing, high-temperature baking, liquid injection, high-temperature soaking, formation, battery cell vacuum packaging, aging, capacity division, and battery cell open circuit voltage test in sequence; after the battery cell open circuit voltage test passes, a soft-pack battery is obtained. For the withstand voltage test, aluminum-plastic film sealing, high-temperature baking, liquid injection, high-temperature soaking, formation, battery cell vacuum packaging, aging, capacity division, and battery cell open circuit voltage test, please refer to any implementation method of the relevant technology. Specifically, the embodiments of this application will not be repeated here.

[0079] The present application also provides another method for preparing a soft-pack battery cell. Figure 3 As shown, including:

[0080] Step 201, after establishing a connection with the wireless temperature and pressure sensor in the soft-pack battery cell, setting a target thermal pressure parameter;

[0081] Step 202, receiving real-time thermal pressure parameters sent by the wireless temperature and pressure sensor;

[0082] Step 203, determining whether the difference between the real-time hot-pressing parameter and the target hot-pressing parameter is less than a preset difference.

[0083] When it is determined that the difference between the real-time hot pressure parameter and the target hot pressure parameter is less than the preset difference, step 204 is executed; when it is determined that the difference between the real-time hot pressure parameter and the target hot pressure parameter is greater than or equal to the preset difference, step 205 is executed.

[0084] Step 204, stopping the hot pressing of the soft-pack battery cell.

[0085] Step 205 , continue to hot-press the soft-pack battery cell until the difference between the real-time hot-pressing parameter and the target hot-pressing parameter is less than the preset difference.

[0086] In order to facilitate the staff to view the real-time hot pressing parameters, after receiving the real-time hot pressing parameters sent by the wireless temperature and pressure sensor, the received real-time hot pressing parameters are displayed. When displaying, it can be displayed directly on the display screen of the hot pressing equipment, or it can be displayed on other display screens that establish a wireless connection with the wireless temperature and pressure sensor in the soft-pack battery cell. Specifically, the embodiments of the present application do not limit this.

[0087] The present application also provides a soft pack battery system. Figure 4 As shown, it includes: a soft-pack battery cell 31 as described in any of the above embodiments, and a controller 32,

[0088] The controller 32 is connected to the wireless temperature and pressure sensor of the soft-pack battery cell, and is used to adjust the target thermal pressure parameters of the soft-pack battery cell according to the real-time thermal pressure parameters sent by the wireless temperature and pressure sensor.

[0089] Furthermore, in a possible implementation of this embodiment, as Figure 4 As shown, the system also includes:

[0090] The display unit 33 is connected to the wireless temperature and pressure sensor and is used to display the pressure and temperature received from the wireless temperature and pressure sensor.

[0091] Corresponding to the above-mentioned method for preparing a soft-pack battery cell, the present invention further provides a device for preparing a soft-pack battery cell. Since the device embodiment of the present invention corresponds to the above-mentioned method embodiment, details not disclosed in the device embodiment can be referred to the above-mentioned method embodiment, and will not be repeated in the present invention.

[0092] Figure 5 A schematic diagram of a structure of a soft-pack battery cell preparation device provided in an embodiment of the present disclosure, such as Figure 5 As shown, including:

[0093] A setting unit 41 is used to set a target thermal pressure parameter after establishing a connection with a wireless temperature and pressure sensor in a soft-pack battery cell, wherein the wireless temperature and pressure sensor is arranged on a positive electrode sheet and / or a negative electrode sheet of the soft-pack battery cell;

[0094] A receiving unit 42, configured to receive real-time thermal pressure parameters sent by the wireless temperature and pressure sensor;

[0095] The control unit 43 is configured to stop hot pressing the soft-pack battery cell when it is determined that the difference between the real-time hot pressing parameter and the target hot pressing parameter is less than a preset difference.

[0096] The soft-pack battery cell preparation device provided by the present disclosure sets target hot-pressing parameters after establishing connection with the wireless temperature and pressure sensor in the soft-pack battery cell; receives real-time hot-pressing parameters sent by the wireless temperature and pressure sensor; and stops hot-pressing the soft-pack battery cell when it is determined that the difference between the real-time hot-pressing parameter and the target hot-pressing parameter is less than a preset difference. For soft-pack battery cells prepared under different tooling, universal hot-pressing process optimization is performed, that is, a thin-layer wireless temperature and pressure sensor is set on the positive electrode plate and / or the negative electrode plate at the center of the JR, and the internal temperature and pressure of the JR are detected by the wireless temperature and pressure sensor, so as to improve the hot-pressing effect and safety inside the JR, so that the battery cell offline data is relatively better and the electrochemical test results are relatively more excellent.

[0097] Furthermore, in a possible implementation of this embodiment, as Figure 6 As shown, the device also includes:

[0098] The display unit 44 is used to display the received real-time thermal pressure parameters after receiving the real-time thermal pressure parameters sent by the wireless temperature and pressure sensor.

[0099] Optionally, the real-time hot pressing parameters include real-time hot pressing temperature and real-time hot pressing pressure.

[0100] It should be noted that the above explanation of the method embodiment is also applicable to the device of this embodiment, and the principle is the same, which is not limited in this embodiment.

[0101] According to an embodiment of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium and a computer program product.

[0102] Figure 7 A schematic block diagram of an example electronic device 500 that can be used to implement an embodiment of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or required herein.

[0103] like Figure 7As shown, the device 500 includes a computing unit 501, which can perform various appropriate actions and processes according to a computer program stored in a ROM (Read-Only Memory) 502 or a computer program loaded from a storage unit 508 to a RAM (Random Access Memory) 503. In the RAM 503, various programs and data required for the operation of the device 500 can also be stored. The computing unit 501, the ROM 502, and the RAM 503 are connected to each other via a bus 504. An I / O (Input / Output) interface 505 is also connected to the bus 504.

[0104] A number of components in the device 500 are connected to the I / O interface 505, including: an input unit 506, such as a keyboard, a mouse, etc.; an output unit 507, such as various types of displays, speakers, etc.; a storage unit 508, such as a disk, an optical disk, etc.; and a communication unit 509, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 509 allows the device 500 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0105] The computing unit 501 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 501 include, but are not limited to, a CPU (Central Processing Unit), a GPU (Graphic Processing Units), various dedicated AI (Artificial Intelligence) computing chips, various computing units running machine learning model algorithms, DSP (Digital Signal Processor), and any appropriate processor, controller, microcontroller, etc. The computing unit 501 performs the various methods and processes described above, such as a method for preparing a soft-pack battery cell. For example, in some embodiments, the method for preparing a soft-pack battery cell may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit 508. In some embodiments, part or all of the computer program may be loaded and / or installed on the device 500 via the ROM 502 and / or the communication unit 509. When the computer program is loaded into the RAM 503 and executed by the computing unit 501, one or more steps of the method described above may be performed. Alternatively, in other embodiments, the computing unit 501 may be configured to execute the aforementioned method for preparing the soft-pack battery cell in any other appropriate manner (for example, by means of firmware).

[0106] Various embodiments of the systems and techniques described above herein may be implemented in digital electronic circuit systems, integrated circuit systems, FPGAs (Field Programmable Gate Arrays), ASICs (Application-Specific Integrated Circuits), ASSPs (Application Specific Standard Products), SOCs (System On Chips), CPLDs (Complex Programmable Logic Devices), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include: being implemented in one or more computer programs that may be executed and / or interpreted on a programmable system including at least one programmable processor that may be a dedicated or general-purpose programmable processor that may receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0107] The program code for implementing the method of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0108] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a RAM, a ROM, an EPROM (Electrically Programmable Read-Only-Memory) or a flash memory, an optical fiber, a CD-ROM (Compact Dis sc Read-Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0109] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (Cathode-Ray Tube) or LCD (Liquid Crystal Display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0110] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: LAN (Local Area Network), WAN (Wide Area Network), the Internet, and blockchain networks.

[0111] A computer system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship between the client and the server is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services ("Virtual Private Server", or "VPS" for short). The server may also be a server of a distributed system, or a server combined with a blockchain.

[0112] It should be noted that artificial intelligence is a discipline that studies how computers can simulate certain human thought processes and intelligent behaviors (such as learning, reasoning, thinking, planning, etc.), and includes both hardware-level and software-level technologies. Artificial intelligence hardware technologies generally include technologies such as sensors, dedicated artificial intelligence chips, cloud computing, distributed storage, and big data processing; artificial intelligence software technologies mainly include computer vision technology, speech recognition technology, natural language processing technology, as well as machine learning / deep learning, big data processing technology, knowledge graph technology, and other major directions.

[0113] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.

[0114] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A soft-pack battery cell, characterized in that: include: Negative electrode sheet, diaphragm, positive electrode sheet and wireless temperature and pressure sensor; The diaphragm is located between the negative electrode sheet and the positive electrode sheet; The wireless temperature and pressure sensor is located on the positive electrode sheet and / or the negative electrode sheet.

2. The soft-pack battery cell according to claim 1, characterized in that: The positive electrode plate is any one of medium nickel, low nickel, high nickel ternary, lithium iron phosphate and lithium manganese iron phosphate; The negative electrode is 90% graphite and 10% pre-lithium silicon oxide.

3. A method for preparing a soft-pack battery cell, characterized in that: include: After establishing a connection with a wireless temperature and pressure sensor in a soft-pack battery cell, setting a target thermal pressure parameter, wherein the wireless temperature and pressure sensor is disposed on a positive electrode sheet and / or a negative electrode sheet of the soft-pack battery cell; Receiving real-time thermal pressure parameters sent by the wireless temperature and pressure sensor; When it is determined that the difference between the real-time hot-pressing parameter and the target hot-pressing parameter is less than a preset difference, hot-pressing the soft-pack battery cell is stopped.

4. The method according to claim 3, characterized in that After receiving the real-time thermal pressure parameters sent by the wireless temperature and pressure sensor, the method further includes: The received real-time hot pressing parameters are displayed.

5. The method according to claim 3 or 4, characterized in that: The real-time hot pressing parameters include real-time hot pressing temperature and real-time hot pressing pressure.

6. A soft pack battery system, characterized in that: include: The soft-pack battery cell and controller as claimed in claim 1 or 2, The controller is connected to the wireless temperature and pressure sensor of the soft-pack battery cell, and is used to adjust the target thermal pressure parameters of the soft-pack battery cell according to the real-time thermal pressure parameters sent by the wireless temperature and pressure sensor.

7. The soft pack battery system according to claim 6, characterized in that: Also includes: A display unit is connected to the wireless temperature and pressure sensor and is used to display the pressure and temperature received from the wireless temperature and pressure sensor.

8. A device for preparing a soft-pack battery cell, characterized in that: include: A setting unit, used to set target thermal pressure parameters after establishing a connection with a wireless temperature and pressure sensor in a soft-pack battery cell, wherein the wireless temperature and pressure sensor is arranged on a positive electrode sheet and / or a negative electrode sheet of the soft-pack battery cell; A receiving unit, used for receiving real-time thermal pressure parameters sent by the wireless temperature and pressure sensor; The control unit is used to stop the hot pressing of the soft-pack battery cell when it is determined that the difference between the real-time hot pressing parameter and the target hot pressing parameter is less than a preset difference.

9. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 3 to 5.

10. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to cause the computer to execute the method according to any one of claims 3-5.

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