Cylindrical lithium ion battery

Abstract

The invention relates to a cylindrical lithium ion battery. The cylindrical lithium ion battery comprises one of a fifth battery and a seventh battery. The cylindrical lithium ion battery comprises a battery cell, a communication module and a control module. The communication module is used for being in communication connection with external equipment and can receive a control instruction of the external equipment; and the control module is connected with the communication module and the battery cell and is used for regulating the voltage output by the battery cell and then supplying power to external equipment under the condition that the communication module receives the control instruction, so that the external equipment is supplied with power under the voltage meeting the requirement. The cylindrical lithium ion battery provided by the invention can realize on-demand power supply, and the power supply performance is improved.

Description

Technical Field

[0001] The present application relates to the technical field of cylindrical batteries, and in particular to lithium-ion cylindrical batteries. Background Art

[0002] In today's era of rapid technological development, electronic technology is advancing by leaps and bounds, various electronic devices are springing up like mushrooms after rain, and the requirements for power supply are becoming increasingly complex and diverse.

[0003] As one of the main energy sources for modern electronic devices, the performance limitations of lithium-ion cylindrical batteries are gradually becoming apparent. Summary of the invention

[0004] Based on this, it is necessary to provide a lithium-ion cylindrical battery that can significantly improve the performance of lithium-ion cylindrical batteries in order to address the problem of large performance limitations of lithium-ion cylindrical batteries.

[0005] In a first aspect, the present application provides a lithium-ion cylindrical battery, wherein the lithium-ion cylindrical battery comprises one of an AA battery and an AA battery; the lithium-ion cylindrical battery comprises:

[0006] Battery cells;

[0007] A communication module, used to communicate with an external device to receive control instructions;

[0008] The control module is connected to the communication module and the battery cell, and is used to adjust the voltage output by the battery cell and then supply power to the external device when the control instruction is received via the communication module.

[0009] In one of the embodiments, the control module is further configured to adjust the voltage output by the battery cell to a preset voltage and then supply power to the external device when no control instruction transmitted via the communication module is received.

[0010] In one embodiment, the control module includes:

[0011] A buck-boost unit, connected to the battery cell and used for connecting to the external device;

[0012] The main control unit is connected to the buck-boost unit and the communication module respectively, and is used to control the buck-boost unit to adjust the voltage output by the battery cell and then supply power to the external device when the control instruction is received via the communication module.

[0013] In one embodiment, the buck-boost unit comprises:

[0014] A first switch circuit is connected to the battery cell and the main control unit respectively;

[0015] a second switch circuit, connected to the first switch circuit and the main control unit respectively;

[0016] an inductor circuit, connected to the first switch circuit and the second switch circuit respectively;

[0017] a third switch circuit, connected to the inductor circuit and the main control unit respectively, and used for connecting the external device;

[0018] a fourth switch circuit, connected to the inductor circuit, the third switch circuit and the main control unit respectively;

[0019] Among them, the main control unit is used to control the first switch circuit and the second switch circuit to be alternately turned on and off, the third switch circuit to be continuously turned on, and the fourth switch circuit to be continuously disconnected, or the third switch circuit and the fourth switch circuit to be alternately turned on and off, the first switch circuit to be continuously turned on, and the second switch circuit to be continuously disconnected, when the control instruction is received via the communication module, so as to adjust the voltage output by the battery cell and then supply power to the external device.

[0020] In one embodiment, the lithium-ion cylindrical battery further comprises:

[0021] The load detection module is connected to the main control unit, the third switch circuit and the battery cell respectively, and is used to connect the external device, and when the main control unit is connected to the external device, the main control unit is powered on and operates.

[0022] In one of the embodiments, the load detection module and the third switch circuit are also used to access a power supply;

[0023] The load detection module is also used to conduct the connection between the power supply or the battery cell and the main control unit when the power supply is connected, so that the main control unit is powered on and works; or,

[0024] When the load detection module and the third switch circuit are not connected to the power supply but connected to the external device, the connection between the battery cell and the main control unit is turned on, so that the main control unit is powered on and operates.

[0025] In one of the embodiments, the load detection module and the third switch circuit are also used to access a power supply;

[0026] The load detection module is also used to enable the main control unit to control the first switch circuit and the second switch circuit to be disconnected, and control the third switch circuit and the fourth switch circuit to be alternately turned on and off when the power supply is connected and the external device is not connected, so that the power supply can charge the battery cell.

[0027] In one embodiment, it also includes:

[0028] A storage module is connected to the main control unit and is used to store the production information and working information of the battery cell. When the communication module receives an information retrieval instruction from the external device, the production information and the working information are sent to the external device through the communication module based on the control of the main control unit.

[0029] In one embodiment, the control module further includes:

[0030] A temperature detection unit, connected to the main control unit, and used to detect the operating temperature of the main control unit;

[0031] The main control unit is further used to control the buck-boost unit to step down the voltage output by the battery cell when the operating temperature is greater than or equal to the alarm temperature;

[0032] The main control unit is further used to control the buck-boost unit to stop working when the operating temperature is greater than a preset threshold temperature; the preset threshold temperature is greater than the alarm temperature.

[0033] In one embodiment, it also includes:

[0034] A first voltage detection module, connected to the battery cell and the control module respectively, and used to detect the voltage of the positive electrode of the battery cell;

[0035] The control module is also used to obtain the power of the battery cell according to the voltage of the positive electrode of the battery cell, and stop transmitting electric energy when the power is less than or equal to a first preset voltage threshold or the power is greater than or equal to a second preset voltage threshold; the second preset voltage threshold is greater than the first preset voltage threshold.

[0036] In one embodiment, it also includes:

[0037] A second voltage detection module, connected to the control module, used to connect to the external device and detect the voltage connected to the external device;

[0038] The control module is further configured to, when the voltage connected to the external device is greater than or equal to a third preset voltage threshold, step down the voltage output by the battery cell and output the voltage to the external device.

[0039] In one embodiment, it also includes:

[0040] A current detection module, connected to the control module, and used to connect to the external device to collect the current connected to the external device;

[0041] The control module is further used to step down the voltage output by the battery cell and output it to the external device when the current connected to the external device is greater than or equal to a first preset current threshold;

[0042] The control module is also used to stop transmitting electric energy when the current connected to the external device is greater than or equal to a second preset current threshold; the second preset current threshold is greater than the first preset current threshold.

[0043] The above-mentioned lithium-ion cylindrical battery includes one of the No. 5 battery and the No. 7 battery. The lithium-ion cylindrical battery includes a battery cell, a communication module and a control module. The communication module can receive control instructions from an external device, so that the control module adjusts the voltage output by the battery cell based on the control instructions, so that the external device can be powered at a voltage that meets the requirements. It can be seen that the lithium-ion cylindrical battery of the present application can realize on-demand power supply and improve the power supply performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 This is one of the structural schematic diagrams of a lithium-ion cylindrical battery in one embodiment of the present application;

[0046] Figure 2 This is a schematic block diagram of the structure of a control module in one embodiment of the present application;

[0047] Figure 3 is a schematic block diagram of the structure of a buck-boost unit in an embodiment of the present application;

[0048] Figure 4 This is a second structural schematic diagram of a lithium-ion cylindrical battery in an embodiment of the present application;

[0049] Figure 5 This is a schematic diagram of the structure of a load detection module in an embodiment of the present application;

[0050] Figure 6 This is a structural diagram of a first voltage detection module in an embodiment of the present application;

[0051] Figure 7 This is a schematic diagram of the structure of a second voltage detection module in an embodiment of the present application;

[0052] Figure 8 Schematic diagram of the structure of a current detection module in an embodiment of the present application.

[0053] Description of Figure Numbers:

[0054] 100: lithium-ion cylindrical battery; 110: battery cell; 120: communication module; 130: control module; 131: buck-boost unit; 1311: first switch circuit; 1312: second switch circuit; 1313: inductor circuit; 1314: third switch circuit; 1315: fourth switch circuit; 132: main control unit; 140: load detection module; 150: first voltage detection module; 160: second voltage detection module; 170: current detection module; 200: external device; 300: power supply. DETAILED DESCRIPTION

[0055] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0056] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] The lithium-ion cylindrical battery described in the embodiments of the present application refers to a lithium battery with a circular cross-section, and the number in the name represents the size of the battery. For example, an 18650 battery represents a cylindrical lithium battery with a diameter of 18 mm and a height of 65 mm. The lithium-ion cylindrical battery described in the embodiments of the present application is relatively small in size, and can be a small battery such as a No. 7 battery (10440 battery, with a diameter of 10 mm and a height of 44 mm), a No. 5 battery (14500 battery, with a diameter of 14 mm and a height of 50 mm), etc., and is usually used in small electronic products, such as flashlights, mini speakers, loudspeakers, wireless speakers, electric toys, digital cameras, etc., but not limited to this.

[0060] Traditional lithium-ion batteries, due to their inherent circuit and chemical system design, have relatively fixed characteristics in terms of voltage output. For example, the voltage output range of common lithium-ion batteries cannot be flexibly adjusted, which makes them incapable of meeting the needs of different electrical equipment.

[0061] See also Figure 1 , Figure 1 FIG. 1 shows one of the structural schematic diagrams of a lithium-ion cylindrical battery 100 in an embodiment of the present application. The lithium-ion cylindrical battery 100 provided in an embodiment of the present application includes a battery cell 110, a communication module 120 and a control module 130. The communication module 120 is used to communicate with an external device 200 (see FIG. 1 ). Figure 1 The control module 130 is connected to the communication module 120 and the battery cell 110. The control module 130 is used to adjust the voltage output by the battery cell 110 and supply power to the external device 200 after receiving the control instruction via the communication module 120.

[0062] Among them, the communication module 120 and the control module 130 can be integrated into a microchip processor. Advanced integrated circuit technology can be used to integrate the communication module 120 and the control module 130 on a tiny chip. By optimizing the circuit layout and algorithm design of the chip, the miniaturization of electronic devices can be achieved to adapt to the small volume of the battery cell. At the same time, the integrated microchip processor has the characteristics of high efficiency, which can further improve the energy utilization efficiency of the battery cell 110. Under the same power, the battery life of the battery cell 110 can be improved and the power consumption can be reduced.

[0063] The external device 200 may be a load, or may include a load and a terminal. Exemplarily, the external device 200 includes only a load, and the communication module 120 may establish a communication connection with the load through wired communication. When the control module 130 is connected to the load, the load is also connected to the communication module 120. The communication module 120 is started after the load is connected, and a communication connection is established with the load to realize command interaction. This command interaction is based on a specific communication protocol to ensure that both parties can accurately transmit information. For example, when the load starts, it sends a control instruction containing its voltage requirement to the communication module 120. After receiving the control instruction, the communication module 120 sends the control instruction to the control module 130, and the control module 130 quickly analyzes and processes it. Based on a pre-set algorithm, the control module 130 can complete voltage adaptation in a very short time to ensure that the voltage supplied to the load accurately matches the power demand of the load.

[0064] In another exemplary embodiment, if the external device 200 includes a load and a terminal, the communication module 120 may establish a communication connection with the terminal through wireless communication. When the lithium-ion cylindrical battery 100 is connected to the load, the terminal may establish a communication connection with the communication module 120 to implement command interaction. For example, the terminal may be a mobile phone, and the load may be a toy car. When the lithium-ion cylindrical battery 100 is connected to the charging terminal of the toy car, the mobile phone may establish a communication connection with the lithium-ion cylindrical battery 100, and the user may send a control instruction to the lithium-ion cylindrical battery 100 through the mobile phone, so that the control module 130 can adjust the voltage output by the battery cell 110 based on the control instruction, so that the lithium-ion cylindrical battery 100 can finally output a supply voltage corresponding to the control instruction to meet the power demand of the toy car.

[0065] The control instruction corresponds to the power supply voltage of the lithium-ion cylindrical battery 100 to the external device 200. When the voltage output by the battery cell 110 is greater than the power supply voltage required by the external device 200, the control module 130 steps down the voltage output by the battery cell 110 and supplies power to the external device 200; when the output voltage of the battery cell 110 is less than the power supply voltage required by the external device 200, the control module 130 steps up the voltage output by the battery cell 110 and supplies power to the external device 200.

[0066] Exemplarily, during the communication between the communication module 120 and the external device 200, the data of the battery cell 110 can also be transmitted to the power-consuming device in real time, realizing two-way data interaction, and providing convenience for the power management and battery monitoring of the external device 200. The communication protocol for the communication module 120 of the present application to communicate with the external device 200 is combined with advanced error correction coding technology, which can effectively correct transmission errors caused by factors such as electromagnetic interference, and ensure the accuracy of data and command transmission. By embedding specific coding information in the carrier signal, various information such as voltage adjustment instructions and data reading requests can be accurately transmitted between the lithium-ion cylindrical battery 100 and the external device 200. In actual tests, the data transmission accuracy of this communication protocol is high and the response speed is faster than that of traditional communication protocols.

[0067] At the same time, by optimizing the modulation and demodulation algorithms of the carrier signal, the response speed of the communication is improved, so that the lithium-ion cylindrical battery 100 can timely receive and process the instructions from the external device 200, and realize fast voltage adjustment and data interaction. This efficient and reliable communication protocol provides strong support for the intelligent management of batteries and compatibility with various devices.

[0068] In this embodiment, the communication module 120 of the lithium-ion cylindrical battery 100 can receive the control command of the external device 200, so that the control module 130 adjusts the voltage output by the battery cell 110 based on the control command, so that the external device 200 can be powered at a voltage that meets the requirements. The lithium-ion cylindrical battery 100 in this embodiment can realize on-demand power supply, which improves the power supply performance. It can be seen that the lithium-ion cylindrical battery 100 in this embodiment has a high degree of adaptability in voltage output. It is no longer limited to the fixed voltage output mode of traditional lithium-ion batteries, but can dynamically adjust the output voltage according to the specific needs of the connected electrical equipment. When the external device 200 is started or the working state changes, the output voltage can be adjusted by sending a control instruction containing the voltage requirement to ensure that a suitable power supply is provided to the external device 200.

[0069] In some embodiments, the control module is further used to adjust the voltage output by the battery cell to a preset voltage and then supply power to an external device when no control instruction transmitted via the communication module is received.

[0070] When the lithium-ion cylindrical battery does not establish a communication connection with the external device, that is, when the control module does not receive the control instruction transmitted by the communication module, the lithium-ion cylindrical battery stably outputs a preset voltage to supply power to the external device. For example, the preset voltage may be 1.5V.

[0071] In this embodiment, when the control module does not receive the control instruction transmitted by the communication module, the control module adjusts the voltage output by the battery cell to a preset voltage and then supplies power to the external device. That is, the lithium-ion cylindrical battery in this embodiment can directly replace common alkaline batteries, such as No. 7 and No. 5 alkaline batteries, to facilitate users to use in traditional alkaline battery application scenarios without any modification to the device. In addition, when the control module receives the control instruction transmitted by the external device via the communication module, the lithium-ion cylindrical battery in this embodiment can also demonstrate a strong voltage regulation capability, and can be configured to any voltage within a preset range, such as between 1.5V and 6V, according to the needs of the electrical equipment, to meet the needs of various types of electronic equipment.

[0072] Combination Figure 2 As shown, Figure 2 The structure schematic block diagram of the control module 130 in an embodiment of the present application is shown. In some embodiments, the control module 130 may include a buck-boost unit 131 and a main control unit 132. The buck-boost unit 131 is connected to the battery cell 110 for connecting to the external device 200; the main control unit 132 is connected to the buck-boost unit 131 and the communication module 120 respectively, and is used to control the buck-boost unit 131 to adjust the voltage output by the battery cell 110 and then supply power to the external device 200 when a control instruction is received via the communication module 120.

[0073] The buck-boost unit 131 can realize functions of voltage boost, voltage reduction, voltage stabilization, etc.

[0074] The main control unit 132 is a microchip processor unit, which is integrated with the buck-boost unit 131. It integrates a large number of transistors and functional devices through semiconductor manufacturing processes to achieve miniaturization of electronic devices, which can reduce communication delays and power consumption between different units and improve the response speed and energy efficiency of the entire lithium-ion cylindrical battery 100. For example, in the voltage regulation process, the control module 130 in this embodiment can complete the processing and execution of voltage regulation within nanoseconds to ensure rapid stabilization of the output voltage.

[0075] Exemplarily, when the main control unit 132 receives a control instruction, the difference between the power supply voltage corresponding to the control instruction and the voltage output by the battery cell 110 is confirmed. When the power supply voltage is greater than the voltage output by the battery cell 110, the buck-boost unit 131 is controlled to boost the voltage output by the battery cell 110 and then supply power to the external device 200. When the power supply voltage is less than the voltage output by the battery cell 110, the buck-boost unit 131 is controlled to step down the voltage output by the battery cell 110 and then supply power to the external device 200. When the difference between the power supply voltage and the voltage output by the battery cell 110 is within a preset range, the buck-boost unit 131 is controlled to stabilize the voltage output by the battery cell 110 and then supply power to the external device 200.

[0076] Combination Figure 3 As shown, Figure 3 The structure schematic block diagram of the buck-boost unit 131 in an embodiment of the present application is shown. In some embodiments, the buck-boost unit 131 may include a first switch circuit 1311, a second switch circuit 1312, an inductor circuit 1313, a third switch circuit 1314, and a fourth switch circuit 1315. The first switch circuit 1311 is connected to the battery cell 110 and the main control unit 132 respectively; the second switch circuit 1312 is connected to the first switch circuit 1311, the inductor circuit 1313, and the main control unit 132 respectively; the inductor circuit 1313 is connected to the first switch circuit 1311 and the second switch circuit 1312 respectively; the third switch circuit 1314 is connected to the inductor circuit 1313 and the main control unit 132 respectively, and is used to connect to the external device 200; the fourth switch circuit 1315 is connected to the inductor circuit 1313, the third switch circuit 1314, and the main control unit 132 respectively. The main control unit 132 is connected; wherein, when receiving a control instruction via the communication module 120, the main control unit 132 controls the first switch circuit 1311 and the second switch circuit 1312 to be alternately turned on and off, the third switch circuit 1314 to be continuously turned on, and the fourth switch circuit 1315 to be continuously turned off, or the third switch circuit 1314 and the fourth switch circuit 1315 to be alternately turned on and off, the first switch circuit 1311 to be continuously turned on, and the second switch circuit 1312 to be continuously turned off, so as to adjust the voltage output by the battery cell 110 and then supply power to the external device 200.

[0077] Exemplarily, when the power supply voltage required by the external device 200 corresponding to the control instruction is greater than the voltage output by the battery cell 110, the main control unit 132 controls the third switch circuit 1314 and the fourth switch circuit 1315 to be switched on and off alternately, the first switch circuit 1311 is continuously turned on, and the second switch circuit 1312 is continuously turned off, so as to boost the voltage output by the battery cell 110 and then supply power to the external device 200.

[0078] In another exemplary manner, when the power supply voltage required by the external device 200 corresponding to the control instruction is lower than the voltage output by the battery cell 110, the main control unit 132 controls the first switch circuit 1311 and the second switch circuit 1312 to be alternately turned on and off, the third switch circuit 1314 to be continuously turned on, and the fourth switch circuit 1315 to be continuously turned off, so as to reduce the voltage output by the battery cell 110 and then supply power to the external device 200.

[0079] As another example, when the difference between the power supply voltage required by the external device 200 corresponding to the control instruction and the voltage output by the battery cell 110 is within a preset range, it means that the two are close. At this time, the main control unit 132 can also simultaneously control the first switch circuit 1311 and the second switch circuit 1312 to be alternately turned on and off, and the third switch circuit 1314 and the fourth switch circuit 1315 to be alternately turned on and off, so as to stably transmit the voltage output by the battery cell 110 to the external device 200.

[0080] Combination Figure 4 As shown, Figure 4 The second structural diagram of the lithium-ion cylindrical battery 100 in an embodiment of the present application is shown. In some embodiments, the lithium-ion cylindrical battery 100 may further include a load detection module 140. The load detection module 140 is respectively connected to the main control unit 132, the third switch circuit 1314 and the battery cell 110, and is used to connect to the external device 200, and when the external device 200 is connected, the main control unit 132 is powered on.

[0081] In this embodiment, the external device 200 may include a load device that consumes electricity. The load detection module 140 can detect whether the external device 200 is connected. When the external device 200 is connected, it is confirmed that the lithium-ion cylindrical battery 100 has been positively connected to the external device 200 that consumes electricity, and the automatic identification function of the external device 200 that consumes electricity can be realized to ensure power supply safety. In addition, the reverse connection of the external device 200 can be avoided to cause circuit failure, thereby improving integrity.

[0082] For example, see the attached Figure 5 , attached Figure 5The structural schematic diagram of the load detection module 140 is shown. The load detection module 140 may include a first switch tube Q1, a first resistor R1, a second resistor R2, a first diode D1, and a second diode D2. Among them, the first conduction end of the first switch tube Q1 is connected to the positive electrode of the battery cell 110, the second conduction end of the first switch tube Q1 is connected to the anode of the first diode D1, the two ends of the first resistor R1 are respectively connected to the controlled end of the first switch tube Q1 and the first conduction end of the first switch tube Q1, the two ends of the second resistor R2 are respectively connected to the controlled end of the first switch tube Q1 and the anode of the second diode D2, and are used to connect to the external device 200, and the cathodes of the second diode D2 and the first diode D1 are respectively connected to the main control unit 132. When the anode of the second diode D2 is connected to the external device 200, the main control unit 132 is powered on and works.

[0083] It is understandable that the control module 130 in this embodiment may also include some necessary protection elements, for example, a resistor may be provided between the load detection module 140 and the main control unit 132 to prevent the external voltage from causing damage to the main control unit 132. In addition, a resistor and a capacitor may be provided between the main control unit 132 and the load detection module 140 to achieve a reset of the main control unit 132. To protect the circuit safety, a capacitor, a diode device, etc. may also be provided between the equivalent ground terminal and the load detection module 140 to buffer the voltage and current, but the present invention is not limited thereto.

[0084] In some embodiments, the load detection module 140 and the third switch circuit 1314 are also used to connect to the power supply 300. The load detection module 140 is also used to connect to the power supply 300 or the battery cell 110 and the main control unit 132 when the power supply 300 is connected, so that the main control unit 132 is powered on and operates.

[0085] Alternatively, in some embodiments, when the load detection module 140 and the third switch circuit 1314 are not connected to the power supply 300 but connected to the external device 200, the connection between the battery cell 110 and the main control unit 132 is turned on, so that the main control unit 132 is powered on and operates.

[0086] It is understandable that the lithium-ion cylindrical battery 100 has a positive electrode and a negative electrode, and the positive electrode and the negative electrode of the lithium-ion cylindrical battery 100 can be used to connect to the external device 200 or the power source 300 .

[0087] For example, when the lithium-ion cylindrical battery 100 is connected to the power source 300 but not to the external device 200, the lithium-ion cylindrical battery 100 is charged under the power supply of the power source 300. At this time, the load detection module 140 is used to detect whether the lithium-ion cylindrical battery 100 is connected to the power source 300. Figure 5 Taking an example for explanation, if the voltage output by the power supply 300 is greater than the voltage output by the battery cell 110, the second diode D2 is turned on, at which time the connection between the main control unit 132 and the power supply 300 is turned on, and the main control unit 132 is powered on and operates under the power supply of the power supply 300; if the voltage output by the power supply 300 is equal to the voltage output by the battery cell 110, the second diode D2 is turned off, at which time the connection between the main control unit 132 and the battery cell 110 is turned on, and the main control unit 132 is powered on and operates under the power supply of the battery cell 110.

[0088] In another exemplary embodiment, when the lithium-ion cylindrical battery 100 is connected to the external device 200 but not to the power source 300, the load detection module 140 is used to detect whether the lithium-ion cylindrical battery 100 is connected to the external device 200. When the lithium-ion cylindrical battery 100 is connected to the external device 200, the load detection module 140 connects the battery cell 110 to the main control unit 132, and the main control unit 132 is powered on by the battery cell 110.

[0089] In some embodiments, the load detection module and the third switch circuit are also used to connect to a power source; the load detection module is also used to enable the main control unit to control the first switch circuit and the second switch circuit to disconnect, and control the third switch circuit and the fourth switch circuit to be alternately turned on and off when the power source is connected and no external device is connected, so that the power source can charge the battery cell.

[0090] In this embodiment, when the load detection module is connected to the power supply and no external device is connected, the buck-boost circuit is used to transmit the power supply energy from the power supply to the battery cell. The voltage output by the power supply is usually greater than the charging voltage of the battery cell. At this time, the main control unit controls the first switch circuit and the second switch circuit to disconnect, and controls the third switch circuit and the fourth switch circuit to be alternately turned on and off to form a step-down circuit, so as to step down the voltage output by the power supply and then charge the battery cell.

[0091] In some embodiments, the lithium-ion cylindrical battery in this embodiment also includes a storage module, which is connected to the main control unit. The storage module is used to store production information and working information of the battery cell. When the communication module receives an information retrieval instruction from an external device, the production information and working information are sent to the external device through the communication module based on the control of the main control unit.

[0092] Among them, the storage module can be integrated with the main control unit to adapt to the small volume characteristics of the battery cell.

[0093] For example, production information includes basic information such as manufacturer, seller, and production date, and can also be traced back to the production batch, raw material source, chemical type, electrical parameters, etc. of the battery cell through the built-in unique identification code. Working information includes the working status of the battery cell, such as charging status, discharging status, abnormality, etc.

[0094] In this embodiment, strong support is provided for quality control and fault tracing. Chemical type information can help users understand the internal chemical composition of the battery so that they can use the battery reasonably in special environments (such as high temperature, high altitude, etc.). Electrical parameters include information such as the internal resistance, capacity, and remaining power of the battery, which are crucial for the power management system of the device to optimize the battery usage strategy. In addition, the lithium-ion cylindrical battery can also provide real-time feedback on its own working status, such as charging status, discharging status, whether there is an abnormality, etc., so that users can grasp the battery status in time. The lithium-ion cylindrical battery in this embodiment supports detailed data reading functions, including manufacturer information, seller information, production date, battery cell tracking and tracing, chemical type, electrical parameters and working status, etc., providing more comprehensive battery management and monitoring capabilities, so that users can find battery problems in time and take corresponding measures, such as stopping the use of abnormal batteries to avoid possible safety risks. Battery cell tracking and tracing information can help users understand the source, production batch, quality inspection status, etc. of the battery cell, so as to facilitate quality tracing and problem troubleshooting when problems arise. Chemical type information allows users to understand the internal chemical composition of the battery, allowing users to safely use the battery according to the chemical composition in special environments. For example, in high temperature environments, batteries with certain chemical compositions may require special protection measures. Electrical parameters such as internal resistance, capacity, and remaining power provide key data for the power management system of electrical devices. The device can optimize the battery usage strategy based on this data and improve energy efficiency.

[0095] In some embodiments, a thermal management module can also be integrated into the control module to improve the service life of the lithium-ion cylindrical battery. Exemplarily, in some embodiments, the control module also includes a temperature detection unit. The temperature detection unit is connected to the main control unit and is used to detect the operating temperature of the main control unit. The main control unit is also used to control the buck-boost unit to step down the voltage output by the battery cell when the operating temperature is greater than or equal to the alarm temperature. The main control unit is also used to control the buck-boost unit to stop working when the operating temperature is greater than a preset threshold temperature; the preset threshold temperature is greater than the alarm temperature.

[0096] The temperature detection unit may be any device capable of sensing temperature, for example, an NTC (Negative Temperature Coefficient) thermistor, but is not limited thereto.

[0097] The alarm temperature is lower than the preset threshold temperature. When the operating temperature is greater than or equal to the alarm temperature, it means that the temperature is too high. At this time, the main control unit controls the buck-boost unit to step down the voltage output by the battery cell to achieve a cooling effect. When the operating temperature is greater than the preset threshold temperature, it means that the temperature is sufficient to affect the normal operation of the lithium-ion cylindrical battery. To ensure power supply safety, the main control unit controls the buck-boost unit to stop working, thereby stopping the power supply of the battery cell, ensuring that the lithium-ion cylindrical battery operates within a safe temperature range and extending the service life of the lithium-ion cylindrical battery.

[0098] In addition to the thermal management function in the above embodiments, other protection modules can also be added in other embodiments to support constant voltage, constant current, and constant power output. The constant voltage output mode ensures that the battery can provide a stable voltage to the electrical equipment when the load changes, which is crucial for voltage-sensitive electronic devices. For example, in some precision medical instruments, a stable voltage supply is a key factor in ensuring the accuracy of instrument measurements, and the constant voltage output function of this battery can meet this requirement. For another example, when the electronic device runs large software and causes a sudden increase in load, the constant voltage output function of the lithium-ion cylindrical battery can ensure that the electronic device will not freeze or lose data due to voltage fluctuations.

[0099] The constant current output mode is suitable for equipment that requires constant current, such as specific power tools. During operation, no matter how the load changes, the lithium-ion cylindrical battery can provide a stable current to ensure the stable operation of the power tool and improve work efficiency.

[0100] The constant power output mode plays an important role in some application scenarios that have strict power requirements, such as some industrial automation equipment. By maintaining constant power output, the equipment can operate stably under different working conditions and reduce failures caused by power fluctuations. For example, some medical instruments can ensure accurate measurement and normal operation of the instruments. This multifunctional output mode enables the battery to meet the diverse needs of different application scenarios and can broaden the application range of lithium-ion cylindrical batteries.

[0101] Exemplarily, in some embodiments, the lithium-ion cylindrical battery 100 further includes a first voltage detection module 150. The first voltage detection module 150 is connected to the battery cell 110 and the control module 130, respectively, and is used to detect the voltage of the positive electrode of the battery cell 110. The control module 130 is also used to obtain the power of the battery cell 110 according to the voltage of the positive electrode of the battery cell 110, and stop transmitting electric energy when the power is less than or equal to the first preset voltage threshold or the power is greater than or equal to the second preset voltage threshold; the second preset voltage threshold is greater than the first preset voltage threshold.

[0102] The first voltage detection module 150 can detect the voltage output from the positive electrode of the battery cell 110 or the voltage input to the positive electrode of the battery cell 110 .

[0103] Exemplarily, when the control module 130 is connected to the external device 200, the battery cell 110 supplies power to the external device 200 via the control module 130. At this time, the first voltage detection module 150 is used to detect the voltage output by the positive electrode of the battery cell 110. The control module 130 can obtain the power of the battery cell 110 based on the voltage output by the positive electrode of the battery cell 110. When the power is less than or equal to the first preset voltage threshold, the transmission of electric energy is stopped, which can prevent the battery cell 110 from being over-discharged and realize under-voltage protection at the same time, thereby preventing the battery cell 110 from being irreversibly damaged due to excessive discharge, thereby extending the service life of the lithium-ion cylindrical battery 100.

[0104] In another exemplary embodiment, when the control module 130 is connected to the power supply 300, the power supply 300 charges the battery cell 110 via the control module 130. At this time, the first voltage detection module 150 is used to detect the voltage input by the power supply 300 to the positive electrode of the battery cell 110 via the control module 130. The control module 130 can obtain the power of the battery cell 110 in real time based on the voltage input to the positive electrode of the battery cell 110. When the power is greater than or equal to the second preset voltage threshold, the transmission of electric energy is stopped, which can avoid overcharging of the battery cell 110 and implement overvoltage protection at the same time to prevent safety accidents such as bulging and fire caused by overcharging of the battery.

[0105] For example, see the attached Figure 6 , attached Figure 6 The schematic diagram of the structure of the first voltage detection module 150 is shown. The first voltage detection module 150 may include a third resistor R3, a fourth resistor R4, and a first capacitor C1, wherein both ends of the third resistor R3 are respectively connected to the battery cell 110 and one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to the equivalent ground terminal GND, one end of the first capacitor C1 is respectively connected to the fourth resistor R4, one end of the third resistor R3 and the control module 130, and the other end of the first capacitor C1 is connected to the equivalent ground terminal GND.

[0106] In addition, in some embodiments, the lithium-ion cylindrical battery 100 may further include a second voltage detection module 160. The second voltage detection module 160 is connected to the control module 130, and is used to connect to the external device 200, and is used to detect the voltage connected to the external device 200. The control module 130 is also used to step down the voltage output by the battery cell 110 and output it to the external device 200 when the voltage connected to the external device 200 is greater than or equal to the third preset voltage threshold.

[0107] For example, see the attached Figure 7 ,read Figure 7The schematic diagram of the structure of the second voltage detection module 160 is shown. The second voltage detection module 160 may include a fifth resistor R5, a sixth resistor R6, and a second capacitor C2, wherein both ends of the fifth resistor R5 are respectively connected to the external device 200 and one end of the sixth resistor R6, the other end of the sixth resistor R6 is connected to the equivalent ground terminal GND, one end of the second capacitor C2 is respectively connected to the sixth resistor R6, one end of the fifth resistor R5 and the control module 130, and the other end of the second capacitor C2 is connected to the equivalent ground terminal GND.

[0108] In this embodiment, the voltage input to the external device 200 is detected by the second voltage detection module 160. When the load of the external device 200 changes, for example, the voltage suddenly increases, so that the voltage of the node connected to the external device 200 is greater than or equal to the third preset voltage threshold, it is reduced in voltage to achieve the purpose of stable voltage output.

[0109] In some embodiments, the lithium-ion cylindrical battery 100 further includes a current detection module 170, which is connected to the control module 130 and is used to connect to the external device 200 to collect the current connected to the external device 200. The control module 130 is also used to step down the voltage output by the battery cell 110 and output it to the external device 200 when the current connected to the external device 200 is greater than or equal to the first preset current threshold; the control module 130 is also used to stop transmitting electric energy when the current connected to the external device 200 is greater than or equal to the second preset current threshold; the second preset current threshold is greater than the first preset current threshold.

[0110] For example, see the attached Figure 8 , attached Figure 8 The structure diagram of the current detection module 170 is shown. The current detection module 170 may include a seventh resistor R7 to a ninth resistor R9, a third capacitor C3 and a fourth capacitor C4, the second end of the seventh resistor R7 is connected to the control module 130, the first end of the seventh resistor R7 is used to connect to the external device 200, the first end of the eighth resistor R8 is connected to the second end of the seventh resistor R7, the second end of the eighth resistor R8 is connected to the control module 130 and the first end of the third capacitor C3, the second end of the third capacitor C3 is connected to the equivalent ground terminal GND, the first end of the ninth resistor R9 is connected to the first end of the seventh resistor R7, the second end of the ninth resistor R9 is connected to the first end of the fourth capacitor C4 and the control module 130, and the second end of the fourth capacitor C4 is connected to the equivalent ground terminal GND.

[0111] In this embodiment, the current detection module 170 can detect the current connected to the external device 200. When the current connected to the external device 200 is greater than or equal to the first preset current threshold, it indicates that the circuit has an overcurrent. At this time, the control module 130 reduces the voltage output by the battery cell 110 to achieve constant power output. When the current connected to the external device 200 is greater than or equal to the second preset current threshold, it indicates that the overcurrent level of the circuit affects the circuit safety and a short circuit may occur. At this time, the control module 130 stops transmitting electrical energy to achieve overcurrent protection and ensure circuit safety.

[0112] In some embodiments, the modules, units, and cells in the lithium-ion cylindrical battery can be packaged using an integrated packaging technology. Integrating the cells and the electronic devices in the modules and units into one chip can simplify the production process, improve production efficiency, and enhance the overall safety of the lithium-ion cylindrical battery. During the packaging process, packaging materials with good insulation properties and mechanical strength can be selected to meet the thermal stability requirements of the lithium-ion cylindrical battery under different environments. When selecting packaging materials with good insulation properties and mechanical strength, strict tests can be carried out to simulate the occurrence of short circuits, leakage and other faults in the lithium-ion cylindrical battery under various harsh environmental conditions (such as high temperature, high humidity, strong vibration, etc.) to ensure the effectiveness of the packaging materials, thereby screening out qualified packaging materials to ensure the safe and stable operation of the lithium-ion cylindrical battery. In addition, insulating materials with extremely high dielectric constants and breakdown voltages can also be selected to form a reliable insulation barrier between the cells and the electronic devices, so that the lithium-ion cylindrical battery can prevent short circuits between the cells and the electronic devices even under extreme conditions such as severe vibration and high temperature. At the same time, the lithium-ion cylindrical battery in this embodiment can adopt a sealed structure to effectively prevent external pollutants such as moisture and dust from entering the lithium-ion cylindrical battery, thereby avoiding the performance degradation and safety hazards of the lithium-ion cylindrical battery caused by pollution. For example, in a humid environment, traditional batteries may suffer from corrosion, leakage and other problems due to the entry of moisture, while the lithium-ion cylindrical battery in this embodiment can work normally with its excellent isolation and sealing technology, ensuring the safety and stability of the lithium-ion cylindrical battery in various complex environments, and providing users with a reliable power supply guarantee.

[0113] In addition, the lithium-ion cylindrical battery in this embodiment can adopt an integrated design and a standardized interface, making it easy to integrate into existing external devices. The dimensions and interface design of the lithium-ion cylindrical battery meet industry standards. When external device manufacturers design new products or upgrade existing products, they can easily integrate the lithium-ion cylindrical battery in this embodiment into the corresponding external device without large-scale circuit modification and structural adjustment. In terms of maintenance, the integrated structure adopted by the lithium-ion cylindrical battery in this embodiment reduces the connecting parts, so the disassembly and assembly of the lithium-ion cylindrical battery during maintenance is also more convenient, reducing maintenance costs and time, and improving the availability of the equipment.

[0114] In one embodiment, a lithium-ion cylindrical battery includes a battery cell, a load detection module may include a first switch tube, a first resistor, a second resistor, a first diode, and a second diode, a current detection module includes a seventh resistor to a ninth resistor, a third capacitor, and a fourth capacitor, a first switch circuit includes a second switch tube, a third switch tube, a tenth resistor to a thirteenth resistor, a second switch circuit includes a fourth switch tube and a fourteenth resistor, an inductor circuit includes an inductor, a third switch circuit includes a fifth switch tube, a sixth switch tube, a fifteenth resistor to an eighteenth resistor, a fourth switch circuit includes a seventh switch tube and a nineteenth resistor, a main control unit may be an MCU (Microcontroller Unit), which is configured with a first power pin (such as a VDD pin), a second power pin (such as a VSS pin), an RST pin (Reset), and PA0 to PA10 pins, and in addition, the lithium-ion cylindrical battery in this embodiment also includes a twentieth resistor, a twenty-first resistor, a third diode, a fifth capacitor, a sixth capacitor, and a thermistor.

[0115] Among them, the first conduction end of the first switch tube is connected to the first end of the first resistor, the second end of the first switch tube is connected to the anode of the first diode, the controlled end of the first switch tube is connected to the second end of the first resistor and the first end of the second resistor, the second end of the second resistor is connected to the anode of the second diode, the cathode of the first diode and the cathode of the second diode are both connected to the first power pin of the MCU, and the second end of the second resistor is also used to connect an external device or a power supply.

[0116] The first end of the seventh resistor is used to connect to an external device or a power supply, and the first end of the seventh resistor is also connected to the first end of the ninth resistor, the second end of the seventh resistor is connected to the first end of the eighth resistor and the second end of the fifteenth resistor, the second end of the eighth resistor is connected to the first end of the third capacitor and the PA8 pin of the MCU, the second end of the third capacitor is connected to the equivalent ground terminal, the second end of the ninth resistor is connected to the first end of the fourth capacitor and the PA7 pin of the MCU, so that the MCU obtains the current input to the external device or the current output of the power supply, and the second end of the fourth capacitor is connected to the equivalent ground terminal.

[0117] The first conduction end of the second switch tube is connected to the first end of the tenth resistor and the positive electrode of the battery cell, the second conduction end of the second switch tube is respectively connected to the first conduction end of the fourth switch tube, the first end of the eleventh resistor, and the inductor, the second end of the tenth resistor is respectively connected to the controlled end of the second switch tube, the second end of the eleventh resistor, and the first conduction end of the third switch tube, the second conduction end of the third switch tube is connected to the equivalent ground end, the controlled end of the third switch tube is respectively connected to the first end of the twelfth resistor and the first end of the thirteenth resistor, the second end of the thirteenth resistor is connected to the equivalent ground end, and the second end of the twelfth resistor is connected to the PA0 pin of the MCU, for receiving a PWM (Pulse Width Modulation) signal from the MCU, so that the second switch tube and the third switch tube are turned on or off under the control of the PWM signal.

[0118] The second conduction end of the fourth switch tube is connected to the equivalent ground end, the controlled end of the fourth switch tube is connected to the first end of the fourteenth resistor, and the second end of the fourteenth resistor is connected to the PA1 pin of the MCU, and is used to receive a PWM signal from the MCU so that the fourth switch tube is turned on or off under the control of the PWM signal.

[0119] The first conduction end of the fifth switch tube is connected to the first end of the fifteenth resistor, the second conduction end of the fifth switch tube is respectively connected to the second end of the inductor, the first end of the sixteenth resistor and the first conduction end of the seventh switch tube, the controlled end of the fifth switch tube is connected to the second end of the sixteenth resistor, the second end of the fifteenth resistor and the first conduction end of the sixth switch tube, the second conduction end of the sixth switch tube is connected to the equivalent ground end and the first end of the eighteenth resistor, the controlled end of the sixth switch tube is connected to the second end of the eighteenth resistor and the first end of the seventeenth resistor, and the second end of the seventeenth resistor is connected to the PA2 pin of the MCU, and is used to receive the PWM signal output by the MCU, so that the fifth switch tube and the sixth switch tube are turned on or off under the control of the PWM signal.

[0120] The second conduction end of the seventh switch tube is connected to the equivalent ground end, the controlled end of the seventh switch tube is connected to the first end of the nineteenth resistor, and the second end of the nineteenth resistor is connected to the PA3 pin of the MCU, and is used to receive the PWM signal output by the MCU so that the seventh switch tube is turned on or off under the control of the PWM signal.

[0121] The first end of the fifth capacitor is connected to the cathode of the first diode and the first power pin of the MCU, and the second end of the fifth capacitor is connected to the equivalent ground terminal. The anode of the third diode is connected to the equivalent ground terminal, and the cathode of the third diode is connected to the first power pin of the MCU. The first end of the twentieth resistor is connected to the first power pin of the MCU, the second end of the twentieth resistor is connected to the RST pin of the MCU and the first end of the sixth capacitor, and the second end of the sixth capacitor is connected to the equivalent ground terminal. The first end of the twenty-first resistor is used to connect an external device or a power supply, and the second end of the twenty-first resistor is connected to the second power pin of the MCU and to the equivalent ground terminal.

[0122] The first end of the thermistor is connected to the PA10 pin (also known as Digital Input Output, DIO pin) of the MCU, and the second end of the thermistor is connected to the equivalent ground terminal.

[0123] The functions of the circuit units composed of various components in this embodiment are the same as the corresponding unit functions and connection relationships in any of the above embodiments. For details, please refer to the definitions of the functions of each unit / module / circuit in the above text, so they will not be repeated here.

[0124] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0125] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the application. It should be noted that, for a person of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A lithium-ion cylindrical battery, characterized in that: The lithium-ion cylindrical battery includes one of an AA battery and an AA battery; the lithium-ion cylindrical battery includes: Battery cells; A communication module, used to communicate with an external device to receive control instructions; The control module is connected to the communication module and the battery cell, and is used to adjust the voltage output by the battery cell and then supply power to the external device when the control instruction is received via the communication module.

2. The lithium-ion cylindrical battery according to claim 1, characterized in that: The control module is also used to adjust the voltage output by the battery cell to a preset voltage and then supply power to the external device when no control instruction transmitted via the communication module is received.

3. The lithium-ion cylindrical battery according to claim 1, characterized in that: The control module comprises: A buck-boost unit, connected to the battery cell and used for connecting to the external device; The main control unit is connected to the buck-boost unit and the communication module respectively, and is used to control the buck-boost unit to adjust the voltage output by the battery cell and then supply power to the external device when the control instruction is received via the communication module.

4. The lithium-ion cylindrical battery according to claim 3, characterized in that: The buck-boost unit comprises: A first switch circuit is connected to the battery cell and the main control unit respectively; a second switch circuit, connected to the first switch circuit and the main control unit respectively; an inductor circuit, connected to the first switch circuit and the second switch circuit respectively; a third switch circuit, connected to the inductor circuit and the main control unit respectively, and used for connecting the external device; a fourth switch circuit, connected to the inductor circuit, the third switch circuit and the main control unit respectively; Among them, the main control unit is used to control the first switch circuit and the second switch circuit to be alternately turned on and off, the third switch circuit to be continuously turned on, and the fourth switch circuit to be continuously disconnected, or the third switch circuit and the fourth switch circuit to be alternately turned on and off, the first switch circuit to be continuously turned on, and the second switch circuit to be continuously disconnected, when the control instruction is received via the communication module, so as to adjust the voltage output by the battery cell and then supply power to the external device.

5. The lithium-ion cylindrical battery according to claim 4, characterized in that: The lithium-ion cylindrical battery also includes: The load detection module is connected to the main control unit, the third switch circuit and the battery cell respectively, and is used to connect the external device, and when the main control unit is connected to the external device, the main control unit is powered on and operates.

6. The lithium-ion cylindrical battery according to claim 5, characterized in that: The load detection module and the third switch circuit are also used to access a power supply; The load detection module is also used to conduct the connection between the power supply or the battery cell and the main control unit when the power supply is connected, so that the main control unit is powered on and works; or, When the load detection module and the third switch circuit are not connected to the power supply but connected to the external device, the connection between the battery cell and the main control unit is turned on, so that the main control unit is powered on and operates.

7. The lithium-ion cylindrical battery according to claim 5, characterized in that: The load detection module and the third switch circuit are also used to access a power supply; The load detection module is also used to enable the main control unit to control the first switch circuit and the second switch circuit to be disconnected, and control the third switch circuit and the fourth switch circuit to be alternately turned on and off when the power supply is connected and the external device is not connected, so that the power supply can charge the battery cell.

8. The lithium-ion cylindrical battery according to claim 3, characterized in that: Also includes: A storage module is connected to the main control unit and is used to store the production information and working information of the battery cell. When the communication module receives an information retrieval instruction from the external device, the production information and the working information are sent to the external device through the communication module based on the control of the main control unit.

9. The lithium-ion cylindrical battery according to claim 3, characterized in that: The control module also includes: A temperature detection unit, connected to the main control unit, and used to detect the operating temperature of the main control unit; The main control unit is further used to control the buck-boost unit to step down the voltage output by the battery cell when the operating temperature is greater than or equal to the alarm temperature; The main control unit is further used to control the buck-boost unit to stop working when the operating temperature is greater than a preset threshold temperature; the preset threshold temperature is greater than the alarm temperature.

10. The lithium-ion cylindrical battery according to claim 1, characterized in that: Also includes: A first voltage detection module, connected to the battery cell and the control module respectively, and used to detect the voltage of the positive electrode of the battery cell; The control module is further used to obtain the power of the battery cell according to the voltage of the positive electrode of the battery cell, and stop transmitting electric energy when the power is less than or equal to a first preset voltage threshold or the power is greater than or equal to a second preset voltage threshold; The second preset voltage threshold is greater than the first preset voltage threshold.

11. The lithium-ion cylindrical battery according to claim 1, characterized in that: Also includes: A second voltage detection module, connected to the control module, used to connect to the external device and detect the voltage connected to the external device; The control module is further configured to, when the voltage connected to the external device is greater than or equal to a third preset voltage threshold, step down the voltage output by the battery cell and output the voltage to the external device.

12. The lithium-ion cylindrical battery according to claim 1, characterized in that: Also includes: A current detection module, connected to the control module, and used to connect to the external device to collect the current connected to the external device; The control module is further used to step down the voltage output by the battery cell and output it to the external device when the current connected to the external device is greater than or equal to a first preset current threshold; The control module is also used to stop transmitting electric energy when the current connected to the external device is greater than or equal to a second preset current threshold; the second preset current threshold is greater than the first preset current threshold.

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