Cylindrical lithium ion battery

Abstract

The utility model relates to a cylindrical lithium ion 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 signal of the external equipment; and the control module is connected with the communication module 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 signal, so that the external equipment is supplied with power under the voltage meeting the requirement. Or the control module is further used for being connected with the load, and adjusting the voltage output by the battery cell to the preset voltage and then supplying power to the load under the condition that the load is connected and the control signal is not received. The cylindrical lithium ion battery provided by the utility model can realize on-demand power supply, and the power supply performance is improved.

Description

Technical Field

[0001] This application relates to the field of cylindrical battery technology, and in particular to lithium-ion cylindrical batteries. Background Technology

[0002] In today's era of rapid technological development, electronic technology is advancing by leaps and bounds, and all kinds of electronic devices are emerging like mushrooms after rain, making the requirements for power supplies increasingly complex and diverse.

[0003] As one of the main energy sources for modern electronic devices, the limitations of lithium-ion cylindrical batteries are becoming increasingly apparent. Utility Model Content

[0004] Therefore, it is necessary to address the limitation of lithium-ion cylindrical battery performance by providing a lithium-ion cylindrical battery that can significantly improve the performance of lithium-ion cylindrical batteries.

[0005] In a first aspect, this application provides a lithium-ion cylindrical battery, the lithium-ion cylindrical battery comprising:

[0006] Battery cell;

[0007] The communication module is used to establish communication connections with external devices to receive control signals;

[0008] A control module, connected to the communication module and the battery cell, is used to regulate the voltage output by the battery cell under the action of the control signal before supplying power to the external device; or,

[0009] The control module is also used to connect a load, and when the load is connected and no control signal is received, to adjust the voltage output by the battery cell to a preset voltage and then supply power to the load.

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

[0011] A buck-boost unit, connected to the battery cell, is used to connect 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 supply power to the external device after receiving the control signal.

[0013] In one embodiment, the boost / buck unit includes:

[0014] The first switching circuit is connected to both the battery cell and the main control unit.

[0015] The second switching circuit is connected to the first switching circuit and the main control unit, respectively.

[0016] An inductor circuit is connected to the first switching circuit and the second switching circuit, respectively.

[0017] The third switching circuit is connected to the inductor circuit and the main control unit respectively, and is used to connect the external device;

[0018] The fourth switching circuit is connected to the inductor circuit, the third switching circuit, and the main control unit, respectively.

[0019] The main control unit is used to control the first switch circuit and the second switch circuit to alternately turn on and off, the third switch circuit to remain on, and the fourth switch circuit to remain off, or the third switch circuit and the fourth switch circuit to alternately turn on and off, the first switch circuit to remain on, and the second switch circuit to remain off, in order to regulate 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 includes:

[0021] The load detection module is connected to the main control unit, the third switching circuit, and the battery cell, respectively, for connecting the load and enabling the main control unit to power on when connected to the load.

[0022] In one embodiment, the load detection module and the third switching circuit are also used to connect to a power source;

[0023] The load detection module is also used to, when the power supply is connected, connect the power supply or the battery cell to the main control unit, thereby powering on the main control unit; or...

[0024] When the load detection module and the third switching circuit are not connected to the power supply, but are connected to the external device, the load detection module connects the battery cell to the main control unit, so that the main control unit is powered on and put into operation.

[0025] In one embodiment, the load detection module and the third switching circuit are also used to connect to a power source;

[0026] The load detection module is also used to enable the main control unit to control the first and second switching circuits to disconnect and control the third and fourth switching circuits to alternately switch on and off when the power supply is connected and the external device is not connected, so that the power supply charges the battery cell.

[0027] In one embodiment, it further includes:

[0028] The storage module, connected to the main control unit, is used to store the production and operating information of the battery cell.

[0029] In one embodiment, the control module further includes a temperature detection unit, a first comparison unit, and a second comparison unit;

[0030] The temperature detection unit is used to detect the operating temperature of the main control unit;

[0031] The first comparison unit is connected to the temperature detection unit and the main control unit, and is used to output a first comparison signal when the operating temperature is greater than or equal to the alarm temperature;

[0032] The second comparison unit is connected to the temperature detection unit and the main control unit, and is used to output a second comparison signal when the operating temperature is greater than a preset threshold temperature; the preset threshold temperature is greater than the alarm temperature.

[0033] The main control unit is further configured to control the buck-boost unit to step down the voltage output by the battery cell under the trigger of the first comparison signal, and to control the buck-boost unit to stop working under the trigger of the second comparison signal; and / or, the control module further includes a first voltage detection unit and a third comparison unit; the first voltage detection unit is connected to the battery cell and is used to detect the voltage of the positive terminal of the battery cell;

[0034] The third comparison unit is connected to the first voltage detection unit and the main control unit, and is used to output a third comparison signal when the voltage of the positive terminal of the battery cell is less than or equal to a first preset voltage threshold, or when the voltage of the positive terminal of the battery cell is greater than or equal to a second preset voltage threshold; the second preset voltage threshold is greater than the first preset voltage threshold.

[0035] The main control unit is also configured to control the buck-boost unit to disconnect the connection between the external device and the battery cell under the triggering of the third comparison signal, so as to stop supplying power to the external device; and / or, the control module further includes a second voltage detection unit and a fourth comparison unit;

[0036] The second voltage detection unit is used to connect to the external device and detect the voltage connected to the external device;

[0037] The fourth comparison unit is connected to the second voltage detection unit and the main control unit, and is used to output a fourth comparison signal when the voltage connected to the external device is greater than or equal to a third preset voltage threshold.

[0038] The main control unit is also used to control the buck-boost unit to step down the voltage output by the battery cell and output it to the external device after being triggered by the fourth comparison signal.

[0039] In one embodiment, the control module includes:

[0040] A current detection unit is used to connect to the external device to collect the current connected to the external device;

[0041] The fifth comparison unit, connected to the current detection unit and the main control unit, is used to output a fifth comparison signal when the current connected to the external device is greater than or equal to the first preset current threshold.

[0042] The sixth comparison unit, connected to the current detection unit and the main control unit, is used to output a sixth comparison signal 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 main control unit is also used to control the buck-boost unit to step down the voltage output by the battery cell and output it to the external device under the trigger of the fifth comparison signal;

[0044] The main control unit is also used to control the buck-boost unit to disconnect the connection between the external device and the battery cell under the trigger of the sixth comparison signal, so as to stop supplying power to the external device.

[0045] In one embodiment, it further includes:

[0046] A control motherboard; wherein the communication module and the control module are integrated into the control motherboard;

[0047] Positive and negative connection components are used to electrically connect the control module and the battery cell;

[0048] The housing is used to encapsulate the battery cell, the control motherboard, the positive electrode connection component, and the negative electrode connection component.

[0049] The aforementioned lithium-ion cylindrical battery includes a cell, a communication module, and a control module. The communication module receives control signals from external devices, enabling the control module to adjust the voltage output from the cell under the influence of these signals, thus supplying power to the external device at the required voltage. Alternatively, the control module can also connect to a load and, when the load is connected and no control signal is received, adjust the cell's output voltage to a preset voltage before supplying power to the load. Therefore, the lithium-ion cylindrical battery of this application can achieve on-demand power supply, improving power supply performance. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is one of the structural schematic diagrams of a lithium-ion cylindrical battery in one embodiment of this application;

[0052] Figure 2 This is a schematic block diagram of the control module in one embodiment of this application;

[0053] Figure 3 This is a schematic block diagram of the boost / buck unit in one embodiment of this application;

[0054] Figure 4 This is a second schematic diagram of the structure of a lithium-ion cylindrical battery in one embodiment of this application;

[0055] Figure 5 This is a schematic diagram of the load detection module in one embodiment of this application;

[0056] Figure 6 This is a schematic diagram of the structure of the first voltage detection unit in one embodiment of this application;

[0057] Figure 7 This is a schematic diagram of the structure of the second voltage detection unit in one embodiment of this application;

[0058] Figure 8 This is a schematic diagram of the current detection unit in one embodiment of this application.

[0059] Explanation of icon numbers:

[0060] 100: Lithium-ion cylindrical battery; 110: Battery cell; 120: Communication module; 130: Control module; 131: Buck-boost unit; 1311: First switching circuit; 1312: Second switching circuit; 1313: Inductor circuit; 1314: Third switching circuit; 1315: Fourth switching circuit; 132: Main control unit; 133: First voltage detection unit; 134: Second voltage detection unit; 135: Current detection unit; 136: Third comparison unit; 137: Fourth comparison unit; 138: Fifth comparison unit; 139: Sixth comparison unit; 140: Load detection module; 200: External device; 300: Power supply. Detailed Implementation

[0061] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0062] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0065] The lithium-ion cylindrical battery described in this application refers to a lithium battery with a circular cross-section, and the numbers in its name represent the battery's size. For example, an 18650 battery indicates a cylindrical lithium battery with a diameter of 18mm and a height of 65mm. The lithium-ion cylindrical batteries described in this application are relatively small in size and can be small batteries such as AAA batteries (10440 batteries, with a diameter of 10mm and a height of 44mm) or AA batteries (14500 batteries, with a diameter of 14mm and a height of 50mm), which are commonly used in small electronic products, such as flashlights, mini speakers, megaphones, wireless speakers, electric toys, digital cameras, etc., but are not limited to these.

[0066] Traditional lithium-ion batteries, due to their internal circuit and chemical system design, exhibit relatively fixed voltage output characteristics. For example, the voltage output range of common lithium-ion batteries cannot be flexibly adjusted, which makes them inadequate when dealing with different electrical devices.

[0067] See Figure 1 , Figure 1 This illustration shows one of the structural schematic diagrams of a lithium-ion cylindrical battery 100 according to an embodiment of this application. The lithium-ion cylindrical battery 100 provided in this embodiment includes a cell 110, a communication module 120, and a control module 130. The communication module 120 is used for communication connection with an external device 200 (see attached diagram). Figure 1 (The communication connection process is represented by dotted lines in the diagram) to receive control signals. The control module 130 is connected to the communication module 120. The control module 130 is used to regulate the voltage output by the battery cell 110 under the action of control signals and then supply power to the external device 200.

[0068] 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 onto a tiny chip. By optimizing the chip's circuit layout, miniaturization of the electronic device can be achieved to suit the small size of the battery cell. Simultaneously, the integrated microchip processor is highly efficient, further improving the energy utilization efficiency of the battery cell 110. Under the same charge capacity, this increases the battery cell 110's battery life and reduces power consumption.

[0069] External device 200 can be a load, or it can include both a load and a terminal. For example, external device 200 may only include a load, and communication module 120 may establish a communication connection with the load via wired communication. When control module 130 is connected to the load, the load is also connected to communication module 120. Communication module 120 starts after the load is connected and establishes a communication connection with the load to achieve 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 signal containing its voltage requirements to communication module 120. After receiving the control signal, communication module 120 sends the control signal to control module 130. Control module 130 completes voltage adaptation under the trigger of the control signal, ensuring that the voltage supplied to the load accurately matches the load's power demand.

[0070] In another example, if the external device 200 includes a load and a terminal, the communication module 120 can establish a communication connection with the terminal via wireless communication. When the lithium-ion cylindrical battery 100 is connected to the load, the terminal can establish a communication connection with the communication module 120 to achieve command interaction. For example, the terminal can be a mobile phone, and the load can be a toy car. When the lithium-ion cylindrical battery 100 is connected to the charging port of the toy car, the mobile phone can establish a communication connection with the lithium-ion cylindrical battery 100. The user can send control signals to the lithium-ion cylindrical battery 100 through the mobile phone, enabling the control module 130 to adjust the voltage output by the cell 110 based on the control signals, so that the lithium-ion cylindrical battery 100 can ultimately output a supply voltage corresponding to the control signals to meet the power needs of the toy car.

[0071] The control signal corresponds to the 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 supply voltage required by the external device 200, the control module 130 steps down the voltage output by the battery cell 110 before supplying power to the external device 200. When the output voltage of the battery cell 110 is less than the supply voltage required by the external device 200, the control module 130 steps up the voltage output by the battery cell 110 before supplying power to the external device 200.

[0072] For example, during the communication process between the communication module 120 and the external device 200, the data from the battery cell 110 can also be transmitted to the power-consuming device in real time, realizing bidirectional data interaction and facilitating power management and battery monitoring for the external device 200. The communication protocol used by the communication module 120 to communicate with the external device 200 incorporates advanced error correction coding technology, which can effectively correct transmission errors caused by factors such as electromagnetic interference, ensuring the accuracy of data and command transmission. By embedding specific coding information into the carrier signal, the lithium-ion cylindrical battery 100 and the external device 200 can accurately transmit various information such as voltage adjustment commands and data read requests. In actual testing, this communication protocol exhibits high data transmission accuracy and a faster response speed than traditional communication protocols.

[0073] In this embodiment, the communication module 120 of the lithium-ion cylindrical battery 100 can receive control signals from the external device 200, enabling the control module 130 to adjust the voltage output of the cell 110 based on the control signals, thereby ensuring that the external device 200 is powered at the required voltage. The lithium-ion cylindrical battery 100 in this embodiment can achieve on-demand power supply, improving power supply performance. It is evident 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 external device. When the external device 200 starts up or its operating state changes, the output voltage can be adjusted by sending a control signal containing voltage requirements, ensuring a suitable power supply for the external device 200.

[0074] In some embodiments, the external device includes a load, and the control module is also used to connect to the load and, when the control module is connected to the load and does not receive a control signal transmitted via the communication module, to adjust the voltage output by the battery cell to a preset voltage and then supply power to the external device.

[0075] When the lithium-ion cylindrical battery is not connected to an external device, that is, when the control module does not receive control signals from the communication module, the lithium-ion cylindrical battery stably outputs a preset voltage to supply power to the load. For example, the preset voltage can be 1.5V.

[0076] In this embodiment, when the control module does not receive the control signal 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 load. 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, facilitating users to use it in traditional alkaline battery application scenarios without any modification to the device. In addition, when the control module receives the control signal transmitted by the load via the communication module, the lithium-ion cylindrical battery in this embodiment can also exhibit a powerful voltage regulation ability and be configured to any voltage within a preset range, such as between 1.5V and 6V, according to the requirements of the electrical device, meeting the needs of various different types of electronic devices.

[0077] Combined Figure 2 as shown Figure 2 The structural schematic 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 and is used to connect to an external device 200. The main control unit 132 is respectively connected to the buck-boost unit 131 and the communication module 120 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 receiving the control signal via the communication module 120.

[0078] The buck-boost unit 131 can respectively implement functions such as boosting, bucking, and voltage stabilization.

[0079] The main control unit 132 is a microchip processor unit. The main control unit 132 is integrated with the buck-boost unit 131. Through semiconductor manufacturing processes, a large number of transistors and functional devices are integrated, realizing the miniaturization of electronic devices, reducing the communication delay and power consumption between different units, and improving the response speed and energy efficiency of the entire lithium-ion cylindrical battery 100. For example, during the voltage regulation process, the control module 130 in this embodiment can complete the processing and execution of voltage adjustment within nanoseconds, ensuring the rapid stability of the output voltage.

[0080] For example, the main control unit 132 may integrate a comparison circuit or comparator. This comparison circuit or comparator compares the difference between the supply voltage corresponding to the control signal and the voltage output by the battery cell 110. If the supply voltage is greater than the voltage output by the battery cell 110, it outputs a comparison signal of a preset level to control the buck-boost unit 131 to boost the voltage output by the battery cell 110 before supplying power to the external device 200. If the supply voltage is less than the voltage output by the battery cell 110, it controls the buck-boost unit 131 to step down the voltage output by the battery cell 110 before supplying power to the external device 200. If the difference between the supply voltage and the voltage output by the battery cell 110 is within a preset range, it controls the buck-boost unit 131 to regulate the voltage output by the battery cell 110 before supplying power to the external device 200.

[0081] Combination Figure 3 As shown, Figure 3 This diagram shows a schematic block diagram of a buck-boost unit 131 according to one embodiment of the present application. In some embodiments, the buck-boost unit 131 may include a first switching circuit 1311, a second switching circuit 1312, an inductor circuit 1313, a third switching circuit 1314, and a fourth switching circuit 1315. The first switching circuit 1311 is connected to the battery cell 110 and the main control unit 132 respectively; the second switching circuit 1312 is connected to the first switching circuit 1311, the inductor circuit 1313, and the main control unit 132 respectively; the inductor circuit 1313 is connected to the first switching circuit 1311 and the second switching circuit 1312 respectively; the third switching circuit 1314 is connected to the inductor circuit 1313 and the main control unit 132 respectively, and is used to connect to an external device 200; the fourth switching circuit 1315 is connected to the inductor circuit 1313, the third switching circuit 1314, and the main control unit 132 respectively. The main control unit 132 is connected; wherein, when the control signal is received through the communication module 120, the main control unit 132 controls the first switch circuit 1311 and the second switch circuit 1312 to alternately turn on and off, the third switch circuit 1314 to remain on, and the fourth switch circuit 1315 to remain off, or the third switch circuit 1314 and the fourth switch circuit 1315 to alternately turn on and off, the first switch circuit 1311 to remain on, and the second switch circuit 1312 to remain off, so as to regulate the voltage output by the battery cell 110 and supply power to the external device 200.

[0082] For example, the main control unit 132 can integrate a comparator. When the power supply voltage required by the external device 200 corresponding to the control signal is greater than the voltage output by the battery cell 110, the corresponding comparison signal is output to control the third switch circuit 1314 and the fourth switch circuit 1315 to alternately turn on and off. The first switch circuit 1311 is continuously turned on, and the second switch circuit 1312 is continuously turned off, so as to realize the voltage output by the battery cell 110 is boosted and then supplied to the external device 200.

[0083] In another example, the comparator integrated in the main control unit 132 confirms that when the power supply voltage required by the external device 200 corresponding to the control signal is less than the voltage output by the battery cell 110, it outputs a corresponding comparison signal to control the first switch circuit 1311 and the second switch circuit 1312 to alternately turn on and off, the third switch circuit 1314 to remain on, and the fourth switch circuit 1315 to remain off, so as to realize the voltage output by the battery cell 110 is stepped down before powering the external device 200.

[0084] As another example, if the comparator integrated in the main control unit 132 confirms that the difference between the power supply voltage required by the external device 200 corresponding to the control signal and the voltage output by the battery cell 110 is within a preset range, it indicates that the two are close. At this time, the corresponding comparison signal is output to simultaneously control the first switch circuit 1311 and the second switch circuit 1312 to alternately turn on and off, and the third switch circuit 1314 and the fourth switch circuit 1315 to alternately turn on and off, so as to stably transmit the voltage output by the battery cell 110 to the external device 200.

[0085] Combination Figure 4 As shown, Figure 4 The second schematic diagram shows the structure of a lithium-ion cylindrical battery 100 according to one embodiment of this application. In some embodiments, the lithium-ion cylindrical battery 100 may further include a load detection module 140. The load detection module 140 is connected to the main control unit 132, the third switching circuit 1314 and the battery cell 110 respectively, and is used to connect to the external device 200. When connected to the external device 200, it enables the main control unit 132 to be powered on and operated.

[0086] The external device 200 may include a load. In this embodiment, the load detection module 140 can detect whether the external device 200 (load) is connected. If an external device 200 (load) is connected, it confirms that the lithium-ion cylindrical battery 100 is correctly connected to the external device 200, enabling automatic identification of the external device 200 and ensuring power supply safety. Furthermore, it prevents reverse connection of the external device 200, thus avoiding circuit failures and improving overall reliability.

[0087] For example, see Appendix Figure 5 , attached Figure 5A schematic diagram of the load detection module 140 is shown. The load detection module 140 may include a first switch Q1, a first resistor R1, a second resistor R2, a first diode D1, and a second diode D2. The first conducting terminal of the first switch Q1 is connected to the positive terminal of the battery cell 110, and the second conducting terminal of the first switch Q1 is connected to the anode of the first diode D1. The two ends of the first resistor R1 are connected to the controlled terminal and the first conducting terminal of the first switch Q1, respectively. The two ends of the second resistor R2 are connected to the controlled terminal of the first switch Q1 and the anode of the second diode D2, respectively, and are used to connect to an external device 200. The cathodes of the second diode D2 and the first diode D1 are 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 operates.

[0088] It is understood that the control module 130 in this embodiment may also include some necessary protective components. For example, a resistor may be placed between the load detection module 140 and the main control unit 132 to prevent external voltage from damaging the main control unit 132. Furthermore, a resistor and capacitor may be placed between the main control unit 132 and the load detection module 140 to reset the main control unit 132. To protect circuit safety, capacitors, diodes, or other devices may be placed between the equivalent ground terminal and the load detection module 140 to buffer voltage and current; this is not a limitation.

[0089] In some embodiments, the load detection module 140 and the third switching circuit 1314 are also used to connect to the power supply 300. The load detection module 140 is also used to connect the power supply 300 or the battery cell 110 to the main control unit 132 when the power supply 300 is connected, so that the main control unit 132 is powered on and put into operation.

[0090] Alternatively, in some embodiments, when the load detection module 140 and the third switching circuit 1314 are not connected to the power supply 300, but are connected to the external device 200, the load detection module 140 conducts the connection between the battery cell 110 and the main control unit 132, so that the main control unit 132 is powered on and put into operation.

[0091] Understandably, the lithium-ion cylindrical battery 100 has a positive electrode and a negative electrode, and the positive and negative electrodes of the lithium-ion cylindrical battery 100 can be used to connect to an external device 200 or a power supply 300.

[0092] For example, when the lithium-ion cylindrical battery 100 is connected to the power supply 300 but not to the external device 200, the lithium-ion cylindrical battery 100 is charged under the power supply of the power supply 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 supply 300. When the lithium-ion cylindrical battery 100 is connected to the power supply 300, the following applies... Figure 5 To illustrate, if the voltage output by power supply 300 is greater than the voltage output by battery cell 110, then the second diode D2 conducts, and the connection between main control unit 132 and power supply 300 is established. Main control unit 132 is powered on and operates under the power supply of power supply 300. If the voltage output by power supply 300 is equal to the voltage output by battery cell 110, then the second diode D2 is cut off, and the connection between main control unit 132 and battery cell 110 is established. Main control unit 132 is powered on and operates under the power supply of battery cell 110.

[0093] In another exemplary embodiment, when the lithium-ion cylindrical battery 100 is connected to an external device 200 but not to a 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 and operates under the power supply of the battery cell 110.

[0094] In some embodiments, the load detection module and the third switching circuit are also used to connect to a power source; the load detection module is also used to, when connected to a power source and without connecting to an external device, cause the main control unit to control the first and second switching circuits to disconnect and control the third and fourth switching circuits to alternately switch on and off, so that the power source charges the battery cell.

[0095] In this embodiment, the load detection module is also used to output a detection signal of the corresponding level to the buck-boost circuit when the power supply is connected and no external device is connected, so that the buck-boost circuit can transmit the power supply energy from the power supply to the battery cell based on the detection signal. 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 alternately turn on and off to form a buck circuit to reduce the voltage output by the power supply and charge the battery cell.

[0096] In some embodiments, the lithium-ion cylindrical battery in this embodiment further includes a storage module connected to the main control unit. The storage module is used to store the cell's production information and operating information.

[0097] For example, when the communication module receives an information retrieval command from an external device, the communication module outputs a communication signal of the corresponding level to the main control unit. The trigger integrated in the main control unit is then triggered and outputs a corresponding trigger signal to the storage unit, causing the storage unit to output the production information and work information, thereby sending the production information and work information to the external device through the communication module.

[0098] The storage module can also be integrated with the main control unit to accommodate the small size of the battery cell.

[0099] For example, production information includes basic information such as manufacturer, distributor, and production date. It can also trace the production batch, raw material source, chemical type, and electrical parameters of the battery cell through a built-in unique identifier. Operational information includes the battery cell's operating status, such as charging status, discharging status, and abnormalities.

[0100] This embodiment provides strong support for quality control and fault tracing. Chemical type information helps users understand the battery's internal chemical composition, enabling proper battery use in special environments (such as high temperature, high altitude, etc.). Electrical parameters, including internal resistance, capacity, and remaining charge, are crucial for the device's power management system to optimize battery usage strategies. Furthermore, the lithium-ion cylindrical battery can provide real-time feedback on its operating status, such as charging status, discharging status, and the presence of abnormalities, allowing users to promptly monitor battery conditions. The lithium-ion cylindrical battery in this embodiment supports detailed data reading functions, including manufacturer information, distributor information, production date, cell traceability, chemical type, electrical parameters, and operating status, providing more comprehensive battery management and monitoring capabilities. This allows users to promptly identify battery problems and take appropriate measures, such as stopping the use of abnormal batteries to avoid potential safety risks. Cell traceability information helps users understand the cell's origin, production batch, and quality testing status, facilitating quality traceability and problem troubleshooting in case of issues. Chemical type information allows users to understand the battery's internal chemical composition, enabling them to use the battery safely in specific environments based on its chemical composition. For example, in high-temperature environments, certain chemical compositions of battery cells may require special protection measures. Electrical parameters such as internal resistance, capacity, and remaining charge provide crucial data for the power management system of electrical equipment. Equipment can use this data to optimize battery usage strategies and improve energy efficiency.

[0101] In some embodiments, a thermal management module can also be integrated into the control module to improve the lifespan of the lithium-ion cylindrical battery. Exemplarily, in some embodiments, the control module further includes a temperature detection unit, a first comparison unit, and a second comparison 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 first comparison unit is connected to both the temperature detection unit and the main control unit and is used to output a first comparison signal when the operating temperature is greater than or equal to an alarm temperature. The second comparison unit is connected to both the temperature detection unit and the main control unit and is used to output a second comparison signal when the operating temperature is greater than a preset threshold temperature. The main control unit is also used to control the buck-boost unit to step down the voltage output from the battery cell when triggered by the first comparison signal, and to control the buck-boost unit to stop operating when triggered by the second comparison signal.

[0102] The temperature detection unit can be any device capable of temperature sensing. For example, the temperature detection unit can be an NTC (Negative Temperature Coefficient) thermistor, but it is not limited to this.

[0103] The alarm temperature is below the preset threshold temperature. If the operating temperature is greater than or equal to the alarm temperature, it indicates that the temperature is too high. In this case, the main control unit, triggered by the first comparison signal, outputs a control signal corresponding to the first comparison signal to control the buck-boost unit to reduce the voltage output from the battery cell, thus achieving a cooling effect. If the operating temperature is greater than the preset threshold temperature, it indicates 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, triggered by the second comparison signal, outputs a control signal corresponding to the second comparison signal to control the buck-boost unit to stop working. This disconnects the battery cell from external devices, thereby stopping the power supply to the battery cell and ensuring that the lithium-ion cylindrical battery operates within a safe temperature range, extending the battery's lifespan.

[0104] In addition to the thermal management function described in the above embodiments, other protection modules can 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 device under varying load conditions, 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. As another example, when electronic devices run large software that 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 crash or lose data due to voltage fluctuations.

[0105] The constant current output mode is suitable for devices that require a constant current, such as certain power tools. During operation, regardless of load changes, the lithium-ion cylindrical battery can provide a stable current, ensuring the stable operation of the power tool and improving work efficiency.

[0106] The constant power output mode plays a crucial role in applications with stringent power requirements, such as certain industrial automation equipment. By maintaining a constant power output, the equipment can operate stably under different operating conditions, reducing malfunctions caused by power fluctuations. In medical instruments, it ensures accurate measurements and normal operation. This multi-functional output mode allows this battery to meet the diverse needs of different application scenarios, broadening the application range of lithium-ion cylindrical batteries.

[0107] In some embodiments, for example, the control module 130 further includes a first voltage detection unit 133 and a third comparison unit 136. The first voltage detection unit 133 is connected to the battery cell 110 and is used to detect the voltage at the positive terminal of the battery cell 110. The third comparison unit 136 is connected to the first voltage detection unit 133 and the main control unit 132, and is used to output a third comparison signal when the voltage at the positive terminal of the battery cell 110 is less than or equal to a first preset voltage threshold or greater than or equal to a second preset voltage threshold; the second preset voltage threshold is greater than the first preset voltage threshold. The main control unit 132 is also used to control the buck-boost unit 131 to disconnect the connection between the external device 200 and the battery cell 110 under the trigger of the third comparison signal, so as to stop supplying power to the external device 200.

[0108] The first voltage detection unit 133 can detect the voltage output from the positive terminal of the battery cell 110 or the voltage input to the positive terminal of the battery cell 110.

[0109] For example, when the control module 130 is connected to the external device 200, the battery cell 110 supplies power to the external device 200 through the control module 130. At this time, the first voltage detection unit 133 is used to detect the voltage output of the positive terminal of the battery cell 110. If the voltage of the positive terminal of the battery cell 110 is less than or equal to the first preset voltage threshold, it indicates that the charge is less than or equal to the corresponding first threshold. At this time, the main control unit 132 controls the buck-boost unit 131 to disconnect the connection between the battery cell 110 and the external device 200 under the trigger of the third comparison signal, thereby stopping the transmission of power. This can prevent the battery cell 110 from being over-discharged and at the same time realize undervoltage protection, prevent the battery cell 110 from being irreversibly damaged due to over-discharge, and extend the service life of the lithium-ion cylindrical battery 100.

[0110] In another example, when the control module 130 is connected to the power supply 300, the power supply 300 charges the battery cell 110 through the control module 130. At this time, the first voltage detection unit 133 is used to detect the voltage input from the power supply 300 to the positive terminal of the battery cell 110 through the control module 130. If the voltage of the positive terminal of the battery cell 110 is greater than or equal to the second preset voltage threshold, it indicates that the charge of the battery cell 110 is greater than or equal to the corresponding second threshold. Under the trigger of the third comparison signal, the main control unit 132 controls the buck-boost unit 131 to disconnect the connection between the battery cell 110 and the external device 200, thereby stopping the transmission of electrical energy. This can prevent the battery cell 110 from being overcharged and at the same time realize overvoltage protection to prevent safety accidents such as bulging and fire caused by battery overcharging.

[0111] For example, see Appendix Figure 6 , attached Figure 6 A schematic diagram of the structure of the first voltage detection unit 133 is shown. The first voltage detection unit 133 may include a third resistor R3, a fourth resistor R4, and a first capacitor C1. The two 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 connected to the fourth resistor R4, one end of the third resistor R3, and the third comparison unit 136. The other end of the first capacitor C1 is connected to the equivalent ground terminal GND.

[0112] In some embodiments, the control module 130 may further include a second voltage detection unit 134 and a fourth comparison unit 137. The second voltage detection unit 134 is connected to the external device 200 and is used to detect the voltage supplied to the external device 200. The fourth comparison unit 137 is connected to the second voltage detection unit 134 and the main control unit 132, and is used to output a fourth comparison signal when the voltage supplied to the external device 200 is greater than or equal to a third preset voltage threshold. The main control unit 132 is also used, triggered by the fourth comparison signal, to control the buck-boost unit 131 to step down the voltage output from the battery cell 110 before outputting it to the external device 200.

[0113] For example, see Appendix Figure 7 ,read Figure 7 A schematic diagram of the second voltage detection unit 134 is shown. The second voltage detection unit 134 may include a fifth resistor R5, a sixth resistor R6, and a second capacitor C2. The two ends of the fifth resistor R5 are connected to the external device 200 and one end of the sixth resistor R6, respectively. The other end of the sixth resistor R6 is connected to the equivalent ground terminal GND. One end of the second capacitor C2 is connected to the sixth resistor R6, one end of the fifth resistor R5, and the fourth comparison unit 137. The other end of the second capacitor C2 is connected to the equivalent ground terminal GND.

[0114] In this embodiment, the second voltage detection unit 134 detects the voltage input to the external device 200, and the fourth comparison unit 137 judges the voltage of the external device 200. When the load of the external device 200 changes, such as when the voltage suddenly increases, causing the voltage of the node connected to the external device 200 to be greater than or equal to the third preset voltage threshold, the fourth comparison signal is output to trigger the main control unit 132, thereby outputting a control signal corresponding to the fourth comparison signal to the buck-boost unit 131 to perform voltage reduction processing and achieve the purpose of voltage stabilization output.

[0115] In some embodiments, the control module 130 further includes a current detection unit 135, a fifth comparison unit 138, and a sixth comparison unit 139. The current detection unit 135 is used to connect to the external device 200 to collect the current connected to the external device 200. The fifth comparison unit 138 is connected to the current detection unit 135 and the main control unit 132, and is used to output a fifth comparison signal when the current connected to the external device 200 is greater than or equal to a first preset current threshold. The sixth comparison unit 139 is connected to the current detection unit 135 and the main control unit 132, and is used to output a sixth comparison signal when the current connected to the external device 200 is greater than or equal to a second preset current threshold; the second preset current threshold is greater than the first preset current threshold. The main control unit 132 is also used to control the buck-boost unit 131 to step down the voltage output by the battery cell 110 before outputting it to the external device 200, triggered by the fifth comparison signal. The main control unit 132 is also used to control the buck-boost unit 131 to disconnect the connection between the external device 200 and the battery cell 110 under the trigger of the sixth comparison signal, so as to stop the power supply to the external device 200.

[0116] For example, see Appendix Figure 8 , attached Figure 8 A schematic diagram of the current detection unit 135 is shown. The current detection unit 135 may include a seventh resistor R7 to a ninth resistor R9, a third capacitor C3, and a fourth capacitor C4. The second terminal of the seventh resistor R7 is connected to the fifth comparison unit 138 and the sixth comparison unit 139, and the first terminal of the seventh resistor R7 is used to connect to an external device 200. The first terminal of the eighth resistor R8 is connected to the second terminal of the seventh resistor R7, and the second terminal of the eighth resistor R8 is connected to the fifth comparison unit 138, the sixth comparison unit 139, and the first terminal of the third capacitor C3. The second terminal of the third capacitor C3 is connected to the equivalent ground terminal GND. The first terminal of the ninth resistor R9 is connected to the first terminal of the seventh resistor R7, and the second terminal of the ninth resistor R9 is connected to the first terminal of the fourth capacitor C4, the fifth comparison unit 138, the sixth comparison unit 139, and the second terminal of the fourth capacitor C4 is connected to the equivalent ground terminal GND.

[0117] In this embodiment, the current detection unit 135 can detect the current connected to the external device 200. If the fifth comparison unit 138 determines that the current connected to the external device 200 is greater than or equal to a first preset current threshold, it indicates that an overcurrent has occurred in the circuit. At this time, the fifth comparison unit 138 outputs a fifth comparison signal to trigger the main control unit 132, causing the main control unit 132 to output a control signal corresponding to the fifth comparison signal. This control signal controls the buck-boost unit 131 to step down the voltage output by the battery cell 110, achieving constant power output. If the sixth comparison unit 139 determines that the current connected to the external device 200 is greater than or equal to a second preset current threshold, it indicates that the overcurrent level affects circuit safety and a short circuit may have occurred. At this time, the sixth comparison unit 139 outputs a sixth comparison signal to trigger the main control unit 132, causing the main control unit 132 to output a control signal corresponding to the sixth comparison signal. This control signal stops the buck-boost unit 131 from operating, disconnecting the battery cell 110 from the external device 200, thereby stopping power transmission, achieving overcurrent protection, and ensuring circuit safety.

[0118] In one embodiment, the lithium-ion cylindrical battery further includes a control motherboard, a positive electrode connection assembly, a negative electrode connection assembly, and a housing. The communication module and the control module are integrated into the control motherboard. The positive and negative electrode connection assemblies are used for electrical connection between the control module and the battery cell. The housing is used to encapsulate the battery cell, the control motherboard, the positive electrode connection assembly, and the negative electrode connection assembly.

[0119] In this embodiment, integrating the communication module and control module into the control motherboard enhances the overall safety of the lithium-ion cylindrical battery. Electrically connecting the control module and the battery cell via positive and negative electrode connection components avoids traditional welding methods, simplifying the production process and improving efficiency. Encapsulating the battery cell, control motherboard, positive electrode connection components, and negative electrode connection components in a casing protects the stable structure between these components, preventing damage to the lithium-ion cylindrical battery from external forces.

[0120] In some embodiments, the modules, units, and cells within a lithium-ion cylindrical battery can be integrated using a unified packaging technology. Integrating the cells and electronic components in each module and unit onto a single chip simplifies the production process, improves production efficiency, and enhances the overall safety of the lithium-ion cylindrical battery. During the packaging process, packaging materials with excellent 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, rigorous testing can be conducted. By simulating the occurrence of short circuits, leakage, and other faults within the lithium-ion cylindrical battery under various harsh environmental conditions (such as high temperature, high humidity, and strong vibration), the effectiveness of the packaging materials can be ensured, thereby selecting qualified packaging materials and ensuring the safe and stable operation of the lithium-ion cylindrical battery. Furthermore, insulating materials with extremely high dielectric constants and breakdown voltages can be selected to form a reliable insulating barrier between the cells and electronic components, preventing short circuits between the cells and electronic components even under extreme conditions such as severe vibration and high temperature. Meanwhile, the lithium-ion cylindrical battery in this embodiment employs a sealed structure to effectively prevent external contaminants such as moisture and dust from entering the battery, thus avoiding performance degradation and safety hazards caused by contamination. For example, in humid environments, traditional batteries may experience corrosion and leakage due to moisture ingress, while the lithium-ion cylindrical battery in this embodiment, thanks to its excellent isolation and sealing technology, can operate normally, ensuring the safety and stability of the lithium-ion cylindrical battery in various complex environments and providing users with reliable power supply.

[0121] Furthermore, the lithium-ion cylindrical battery in this embodiment features an integrated design and standardized interface, making it easy to integrate into existing external devices. The lithium-ion cylindrical battery's dimensions and interface design conform to industry standards, allowing external device manufacturers to easily integrate it into corresponding external devices when designing new products or upgrading existing ones, without requiring large-scale circuit modifications and structural adjustments. In terms of maintenance, the integrated structure of the lithium-ion cylindrical battery in this embodiment reduces connecting parts, making disassembly and assembly of the lithium-ion cylindrical battery more convenient during maintenance, reducing maintenance costs and time, and improving equipment availability.

[0122] In one embodiment, the lithium-ion cylindrical battery includes a cell, the load detection module may include a first switch, a first resistor, a second resistor, a first diode, and a second diode, the current detection unit includes a seventh to ninth resistor, a third capacitor, and a fourth capacitor, the first switching circuit includes a second switch, a third switch, and tenth to thirteenth resistors, the second switching circuit includes a fourth switch and a fourteenth resistor, the inductor circuit includes an inductor, the third switching circuit includes a fifth switch, a sixth switch, and fifteenth to eighteenth resistors, the fourth switching circuit includes a seventh switch and a nineteenth resistor, and the main control unit may be an MCU (Microcontroller Unit), which is configured with a first power supply pin (such as VDD pin), a second power supply pin (such as VSS pin), an RST pin (Reset pin), and PA0 to PA10 pins. 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.

[0123] In this configuration, the first conducting terminal of the first switching transistor is connected to the first terminal of the first resistor, the second terminal of the first switching transistor is connected to the anode of the first diode, the controlled terminal of the first switching transistor is connected to the second terminal of the first resistor and the first terminal of the second resistor, the second terminal of the second resistor is connected to the anode of the second diode, the cathodes of the first diode and the cathodes of the second diode are both connected to the first power supply pin of the MCU, and the second terminal of the second resistor is also used to connect to external devices or power supplies.

[0124] The first end of the seventh resistor is used to connect to an external device or 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. 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 can obtain the current input to the external device or the current output by the power supply. The second end of the fourth capacitor is connected to the equivalent ground.

[0125] The first conducting terminal of the second switch is connected to the first terminal of the tenth resistor and the positive terminal of the battery cell. The second conducting terminal of the second switch is connected to the first conducting terminal of the fourth switch, the first terminal of the eleventh resistor, and the inductor. The second terminal of the tenth resistor is connected to the controlled terminal of the second switch, the second terminal of the eleventh resistor, and the first conducting terminal of the third switch. The second conducting terminal of the third switch is connected to the equivalent ground terminal. The controlled terminal of the third switch is connected to the first terminal of the twelfth resistor and the first terminal of the thirteenth resistor. The second terminal of the thirteenth resistor is connected to the equivalent ground terminal. The second terminal of the twelfth resistor is connected to the PA0 pin of the MCU to receive the PWM (Pulse Width Modulation) signal from the MCU, so that the second and third switches are turned on or off under the control of the PWM signal.

[0126] The second conducting terminal of the fourth switch is connected to the equivalent ground terminal, the controlled terminal of the fourth switch is connected to the first terminal of the fourteenth resistor, and the second terminal of the fourteenth resistor is connected to the PA1 pin of the MCU to receive the PWM signal from the MCU so that the fourth switch is turned on or off under the control of the PWM signal.

[0127] The first conducting terminal of the fifth switch is connected to the first terminal of the fifteenth resistor. The second conducting terminal of the fifth switch is connected to the second terminal of the inductor, the first terminal of the sixteenth resistor, and the first conducting terminal of the seventh switch. The controlled terminal of the fifth switch is connected to the second terminal of the sixteenth resistor, the second terminal of the fifteenth resistor, and the first conducting terminal of the sixth switch. The second conducting terminal of the sixth switch is connected to the equivalent ground terminal and the first terminal of the eighteenth resistor. The controlled terminal of the sixth switch is connected to the second terminal of the eighteenth resistor and the first terminal of the seventeenth resistor. The second terminal of the seventeenth resistor is connected to the PA2 pin of the MCU to receive the PWM signal output by the MCU, so that the fifth and sixth switches are turned on or off under the control of the PWM signal.

[0128] The second conducting terminal of the seventh switch is connected to the equivalent ground terminal, the controlled terminal of the seventh switch is connected to the first terminal of the nineteenth resistor, and the second terminal of the nineteenth resistor is connected to the PA3 pin of the MCU to receive the PWM signal output by the MCU, so that the seventh switch is turned on or off under the control of the PWM signal.

[0129] The first terminal of the fifth capacitor is connected to the cathode of the first diode and the first power supply pin of the MCU, and the second terminal of the fifth capacitor is connected to the equivalent ground. The anode of the third diode is connected to the equivalent ground, and the cathode of the third diode is connected to the first power supply pin of the MCU. The first terminal of the twentieth resistor is connected to the first power supply pin of the MCU, and the second terminal of the twentieth resistor is connected to the RST pin of the MCU and the first terminal of the sixth capacitor, and the second terminal of the sixth capacitor is connected to the equivalent ground. The first terminal of the twenty-first resistor is used to connect to an external device or power supply, and the second terminal of the twenty-first resistor is connected to the second power supply pin of the MCU and also to the equivalent ground.

[0130] The first end of the thermistor is connected to the PA10 pin of the MCU (which can also be understood as Digital Input Output, i.e., DIO pin), and the second end of the thermistor is connected to the equivalent ground.

[0131] In this embodiment, the function of the circuit unit composed of each component is the same as the corresponding unit function and connection relationship in any of the above embodiments. For details, please refer to the above description of the function of each unit / module / circuit, so it will not be repeated here.

[0132] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0133] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. A lithium-ion cylindrical battery, characterized in that, The lithium-ion cylindrical battery includes: Battery cell; A communication module is used to establish a communication connection with external devices to receive control signals; the external devices include a load. A control module, connected to the communication module and the battery cell, is used to regulate the voltage output by the battery cell under the action of the control signal before supplying power to the external device; or, The control module is also used to connect a load, and when the load is connected and no control signal is received, to adjust the voltage output by the battery cell to a preset voltage and then supply power to the load.

2. The lithium-ion cylindrical battery according to claim 1, characterized in that, The control module includes: A buck-boost unit, connected to the battery cell, is used to connect 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 supply power to the external device after receiving the control signal.

3. The lithium-ion cylindrical battery according to claim 2, characterized in that, The boost / buck unit includes: The first switching circuit is connected to both the battery cell and the main control unit. The second switching circuit is connected to the first switching circuit and the main control unit, respectively. An inductor circuit is connected to the first switching circuit and the second switching circuit, respectively. The third switching circuit is connected to the inductor circuit and the main control unit respectively, and is used to connect the external device; The fourth switching circuit is connected to the inductor circuit, the third switching circuit, and the main control unit, respectively. The main control unit is used to control the first switch circuit and the second switch circuit to alternately turn on and off, the third switch circuit to remain on, and the fourth switch circuit to remain off, or the third switch circuit and the fourth switch circuit to alternately turn on and off, the first switch circuit to remain on, and the second switch circuit to remain off, in order to regulate the voltage output by the battery cell and then supply power to the external device.

4. The lithium-ion cylindrical battery according to claim 3, characterized in that, The lithium-ion cylindrical battery also includes: The load detection module is connected to the main control unit, the third switching circuit, and the battery cell, respectively, for connecting the load and enabling the main control unit to power on when connected to the load.

5. The lithium-ion cylindrical battery according to claim 4, characterized in that, The load detection module and the third switching circuit are also used to connect to a power source; The load detection module is also used to, when the power supply is connected, connect the power supply or the battery cell to the main control unit, thereby powering on the main control unit; or... When the load detection module and the third switching circuit are not connected to the power supply, but are connected to the external device, the load detection module connects the battery cell to the main control unit, so that the main control unit is powered on and put into operation.

6. The lithium-ion cylindrical battery according to claim 4, characterized in that, The load detection module and the third switching 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 and second switching circuits to disconnect and control the third and fourth switching circuits to alternately switch on and off when the power supply is connected and the external device is not connected, so that the power supply charges the battery cell.

7. The lithium-ion cylindrical battery according to claim 2, characterized in that, Also includes: The storage module, connected to the main control unit, is used to store the production and operating information of the battery cell.

8. The lithium-ion cylindrical battery according to claim 2, characterized in that, The control module further includes a temperature detection unit, a first comparison unit, and a second comparison unit; The temperature detection unit is used to detect the operating temperature of the main control unit; The first comparison unit is connected to the temperature detection unit and the main control unit, and is used to output a first comparison signal when the operating temperature is greater than or equal to the alarm temperature; The second comparison unit is connected to the temperature detection unit and the main control unit, and is used to output a second comparison signal when the operating temperature is greater than a preset threshold temperature; the preset threshold temperature is greater than the alarm temperature. The main control unit is also configured to control the buck-boost unit to step down the voltage output by the battery cell under the trigger of the first comparison signal, and to control the buck-boost unit to stop working under the trigger of the second comparison signal; and / or, the control module further includes a first voltage detection unit and a third comparison unit; The first voltage detection unit is connected to the battery cell and is used to detect the voltage at the positive terminal of the battery cell; The third comparison unit is connected to the first voltage detection unit and the main control unit, and is used to output a third comparison signal when the voltage of the positive terminal of the battery cell is less than or equal to a first preset voltage threshold, or when the voltage of the positive terminal of the battery cell is greater than or equal to a second preset voltage threshold; the second preset voltage threshold is greater than the first preset voltage threshold. The main control unit is also configured to control the buck-boost unit to disconnect the connection between the external device and the battery cell under the triggering of the third comparison signal, so as to stop supplying power to the external device; and / or, the control module further includes a second voltage detection unit and a fourth comparison unit; The second voltage detection unit is used to connect to the external device and detect the voltage connected to the external device; The fourth comparison unit is connected to the second voltage detection unit and the main control unit, and is used to output a fourth comparison signal when the voltage connected to the external device is greater than or equal to a third preset voltage threshold. The main control unit is also used to control the buck-boost unit to step down the voltage output by the battery cell and output it to the external device after being triggered by the fourth comparison signal.

9. The lithium-ion cylindrical battery according to claim 2, characterized in that, The control module includes: A current detection unit is used to connect to the external device to collect the current connected to the external device; The fifth comparison unit, connected to the current detection unit and the main control unit, is used to output a fifth comparison signal when the current connected to the external device is greater than or equal to the first preset current threshold. The sixth comparison unit, connected to the current detection unit and the main control unit, is used to output a sixth comparison signal 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. The main control unit is also used to control the buck-boost unit to step down the voltage output by the battery cell and output it to the external device under the trigger of the fifth comparison signal; The main control unit is also used to control the buck-boost unit to disconnect the connection between the external device and the battery cell under the trigger of the sixth comparison signal, so as to stop supplying power to the external device.

10. The lithium-ion cylindrical battery according to any one of claims 1 to 9, characterized in that, Also includes: A control motherboard; wherein the communication module and the control module are integrated into the control motherboard; Positive and negative connection components are used to electrically connect the control module and the battery cell; The housing is used to encapsulate the battery cell, the control motherboard, the positive electrode connection component, and the negative electrode connection component.

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