Battery protection plate, battery and energy storage device
Patent Information
- Application Number
- CN202521593693.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-28
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-07-28
AI Technical Summary
[0003]现有技术中，NTC采样引脚的走线设计往往较为复杂，NTC一端连接电池保护板的连接器输出端P-网络，另外一端连接温度检测TH网络
本申请提供一种电池保护板、电池及储能设备，本申请提供的电池保护板、电池及储能设备，将负极连接部的B-端靠近NTC检测模块，极大地简化了走线布局。这种优化布局不仅使电路结构更加清晰，减少了信号传输路径的交叉与干扰，还为后续的电路维护和故障排查提供了便利。NTC检测模块一端的检测引脚共用现有的电芯电压检测引脚，这一创新设计巧妙地减少了额外的信号线。信号线的减少直接降低了走线的复杂性，避免了因过多信号线而产生的信号干扰和串扰问题，从而有效提高了电路的通流能力，确保电流能够稳定、高效地传输，减少了能量损耗。
Smart Images
Figure CN224653185U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and more specifically, to a battery protection board, a battery, and an energy storage device. Background Technology
[0002] With the increasing demand for thinner, lighter, narrower bezel designs and faster charging in mobile devices, optimizing the size of battery protection boards has become a key technical challenge. In existing technologies, battery protection boards typically integrate multiple functional modules, including overcharge protection, over-discharge protection, short-circuit protection, and temperature monitoring. Among these, the NTC (Negative Temperature Coefficient) thermistor, as the core component for temperature monitoring, has a significant impact on the overall size and current-carrying capacity of the protection board due to the layout and routing design of its sampling pins.
[0003] In existing technologies, the routing design of the NTC sampling pin is often quite complex. One end of the NTC connects to the P-network of the connector on the battery protection board, and the other end connects to the TH network for temperature detection. Because the P-network is located in an external component area and the TH network is placed at the connector location, an additional signal line is drawn from the purely flexible board area to connect to the NTC, resulting in lower current carrying capacity of the protection board. This also increases the size of the protection board, making it difficult to meet the overall device's requirements for thinner and narrower designs and fast charging. Utility Model Content
[0004] In view of this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a battery protection board, a battery and an energy storage device.
[0005] This utility model provides the following technical solution: In a first aspect, this application provides a battery protection board, including: a positive electrode connection part, a negative electrode connection part, a control module, a protection module, an output module, and an NTC detection module; The positive terminal connection is electrically connected to the control module and the output module, respectively; The protection module is electrically connected to the negative terminal connection, the control module, and the output module, respectively. One end of the NTC detection module is electrically connected to the cell voltage detection pin of the output module, and the cell voltage detection pin is used to detect the voltage of the negative terminal connection in real time. The other end of the NTC detection module is electrically connected to the NTC voltage sampling pin of the output module. The NTC voltage sampling pin is used to detect the voltage of the NTC detection module near the output module in real time.
[0006] In one embodiment, the battery protection board further includes: a sampling module, a filtering module, and a current limiting module; The sampling module is electrically connected to the negative terminal connection, the NTC detection module, the filtering module, the current limiting module, and the protection module, respectively. The filtering module is electrically connected to the protection module, the output module, the control module, and the current limiting module, respectively. The current limiting module is electrically connected to the control module, the output module, and the protection module, respectively.
[0007] In one embodiment, the NTC detection module includes: an NTC sampling resistor; The first end of the NTC sampling resistor is electrically connected to the cell voltage detection pin of the output module, and the first end of the NTC sampling resistor is electrically connected to the sampling module. The second end of the NTC sampling resistor is electrically connected to the NTC voltage sampling pin of the output module.
[0008] In one embodiment, the sampling module includes: a sampling resistor; The first terminal of the sampling resistor is electrically connected to the first terminal of the NTC sampling resistor, the current limiting module, and the filtering module, respectively. The second end of the sampling resistor is electrically connected to the protection module and the current limiting module.
[0009] In one embodiment, the filtering module includes: a first filtering submodule, a second filtering submodule, and a third filtering submodule; The first filtering submodule is electrically connected to the control module, the current limiting module, and the sampling module, respectively; The second filtering submodule is electrically connected to the protection module; The third filtering submodule is electrically connected to the output module, the current limiting module, and the protection module, respectively.
[0010] In one embodiment, the first filtering submodule includes: a first filtering capacitor, a second filtering capacitor, and a third filtering capacitor; the second filtering submodule includes: a fourth filtering capacitor; and the third filtering submodule includes: a fifth filtering capacitor. The first terminal of the first filter capacitor is electrically connected to the current limiting module and the control module, respectively. The second terminal of the first filter capacitor is electrically connected to the first terminal of the second filter capacitor. The second terminal of the second filter capacitor is electrically connected to both the control module and the first terminal of the third filter capacitor. The first terminal of the third filter capacitor is also electrically connected to the first terminal of the sampling resistor; The second terminal of the third filter capacitor is electrically connected to the current limiting module and the control module, respectively; The first terminal of the fourth filter capacitor is electrically connected to the protection module. The second terminal of the fourth filter capacitor is electrically connected to the protection module. The first terminal of the fifth filter capacitor is electrically connected to the output module and the current limiting module, respectively; The second terminal of the fifth filter capacitor is electrically connected to the current limiting module, the protection module, and the output module, respectively.
[0011] In one embodiment, the current limiting module includes: a first current limiting submodule, a second current limiting submodule, a third current limiting submodule, and a fourth current limiting submodule; The first current limiting submodule is electrically connected to both the filtering module and the output module. The second current limiting submodule is electrically connected to the output module, the NTC detection module, and the sampling module, respectively. The third current limiting submodule is electrically connected to the filtering module, the sampling module, the control module, and the protection module, respectively. The fourth current-limiting submodule is electrically connected to the control module, the protection module, the filtering module, and the output module, respectively.
[0012] In one embodiment, the first current-limiting submodule includes: a first current-limiting resistor; the second current-limiting submodule includes: a second current-limiting resistor; the third current-limiting submodule includes: a third current-limiting resistor; and the fourth current-limiting submodule includes: a fourth current-limiting resistor. The first terminal of the first current-limiting resistor is electrically connected to the first terminal of the fifth filter capacitor and the output module, respectively. The second end of the first current-limiting resistor is electrically connected to the first end of the first filter capacitor and the control module, respectively. The first end of the second current-limiting resistor is electrically connected to both the negative terminal connection and the first end of the sampling resistor. The second terminal of the second current-limiting resistor is electrically connected to the NTC voltage sampling pin; The first terminal of the third current-limiting resistor is electrically connected to the first terminal of the third filter capacitor and the control module, respectively. The second terminal of the third current-limiting resistor is electrically connected to the second terminal of the sampling resistor and the protection module, respectively. The first end of the fourth current-limiting resistor is electrically connected to the control module. The second end of the fourth current-limiting resistor is electrically connected to the protection module.
[0013] Secondly, this utility model provides a battery, which includes the battery protection board and the battery cell described in the first aspect of this utility model. The positive electrode of the battery cell is electrically connected to the positive electrode connection portion of the battery protection board, and the negative electrode of the battery cell is electrically connected to the negative electrode connection portion of the battery protection board.
[0014] Thirdly, this utility model provides an energy storage device, which includes the battery described in the second aspect of this utility model.
[0015] The embodiments of this utility model have the following advantages: This application provides a battery protection board, a battery, and an energy storage device. The battery protection board, battery, and energy storage device provided by this application place the B-terminal of the negative terminal connection close to the NTC detection module, greatly simplifying the wiring layout. This optimized layout not only makes the circuit structure clearer and reduces signal transmission path crossings and interference, but also facilitates subsequent circuit maintenance and troubleshooting. The detection pins at one end of the NTC detection module share existing cell voltage detection pins; this innovative design cleverly reduces additional signal lines. The reduction in signal lines directly reduces wiring complexity, avoids signal interference and crosstalk problems caused by excessive signal lines, thereby effectively improving the circuit's current-carrying capacity, ensuring stable and efficient current transmission, and reducing energy loss.
[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of a battery protection board provided in an embodiment of this application; Figure 2 This is another structural schematic diagram of the battery protection board provided in an embodiment of this application; Figure 3 A circuit diagram of a battery protection board provided in an embodiment of this application; Figure 4 This is a schematic diagram of the battery structure provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the energy storage device provided in the embodiments of this application.
[0019] Specific component symbol explanation: Icons: 10-Battery protection board; 103-Control module; 104-Protection module; 105-Output module; 106-NTC detection module; 108-Filtering module; 107-Sampling module; 109-Current limiting module; 101-Positive terminal connection; 102-Negative terminal connection; 1081-First filter submodule; 1082-Second filter submodule; 1083-Third filter submodule; 1091-First current limiting submodule; 1092-Second current limiting submodule; 1093-Third current limiting submodule; 1094-Fourth current limiting submodule; 20-Battery; 200-Cell; 30-Energy storage device. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be further described clearly and completely below with reference to the accompanying drawings of the embodiments of this utility model. It should be noted that the described embodiments are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0021] 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 one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0023] Example 1 Figure 1This is a schematic diagram of a battery protection board 10 provided in an embodiment of this application. The battery protection board 10 includes: a positive terminal connection 101, a negative terminal connection 102, a control module 103, a protection module 104, an output module 105, and an NTC detection module 106. The positive terminal connection 101 is electrically connected to both the control module 103 and the output module 105. The protection module 104 is electrically connected to both the negative terminal connection 102, the control module 103, and the output module 105. One end of the NTC detection module 106 is electrically connected to the cell voltage detection pin of the output module 105, which is used to detect the voltage of the negative terminal connection 102 in real time. The other end of the NTC detection module 106 is electrically connected to the NTC voltage sampling pin of the output module 105, which is used to detect the voltage of the NTC detection module 106 near the output module 105 in real time.
[0024] Optionally, the positive terminal connection 101 and the negative terminal connection 102 use positive and negative nickel plates, respectively. The output module 105 is an output connector that converts the voltage across the NTC detection module 106 into a real-time resistance value. The entire device uses the NTC voltage sampling pin TH of the output module 105 to detect the voltage of the NTC detection module 106 near the output module 105 in real time. By connecting one end of the NTC detection module 106 to the B-network, the cell voltage sampling pin B1- of the output module 105 detects the voltage of the negative terminal connection 102 in real time, that is, the voltage at the end where the NTC detection module 106 is connected to the B-network.
[0025] Furthermore, the output method can be wires, springs, gold fingers, etc., and this application does not impose any restrictions on it.
[0026] This application simplifies wiring by placing the B- terminal of the negative terminal connection 102 close to the NTC detection module 106. Furthermore, one end of the NTC detection module 106 shares the existing cell voltage detection pin B1-, meaning one end of the NTC detection module 106 is connected to the cell voltage signal line. This further reduces additional signal lines and wiring complexity, preventing extra signal lines from affecting current carrying capacity and effectively improving current carrying capacity. This optimized layout not only makes the circuit structure clearer and reduces signal transmission path intersections and interference, but also facilitates subsequent circuit maintenance and troubleshooting, while effectively reducing the size of the battery protection board.
[0027] In one embodiment, the NTC detection module 106 can be an NTC sampling resistor. The first end of the NTC sampling resistor is electrically connected to the cell voltage detection pin of the output module 105, the first end of the NTC sampling resistor is electrically connected to the sampling module 107, and the second end of the NTC sampling resistor is electrically connected to the NTC voltage sampling pin of the output module 105.
[0028] It should be noted that the NTC sampling resistor is a thermistor, and its working principle is based on the negative temperature coefficient characteristic of the material. When the temperature rises, the resistance value of the NTC sampling resistor will drop rapidly because the number of free electrons and holes in the material increases with the temperature. This allows the cell temperature to be detected by detecting the change in resistance value.
[0029] In this embodiment, the voltage across the NTC sampling resistor is acquired in real time via the cell voltage detection pin B1- and the NTC voltage sampling pin TH of the output module 105. The voltage difference is calculated based on the voltage across the two ends, and then converted into a real-time resistance value according to Ohm's law. Then, the real-time resistance value is converted into a real-time temperature value according to the RT characteristic table of the NTC sampling resistor, thus enabling real-time detection of the cell temperature. Since the two ends of the NTC sampling resistor are connected to the cell voltage detection pin B1- and the NTC voltage sampling pin TH of the output module 105 respectively, real-time detection of the cell temperature can continue even when the MOS transistor of the battery protection board 10 is disconnected and there is no voltage output.
[0030] In one implementation, such as Figure 2 As shown, the battery protection board 10 also includes a sampling module 107, a filtering module 108, and a current limiting module 109. The sampling module 107 is electrically connected to the negative terminal connection 102, the NTC detection module 106, the filtering module 108, the current limiting module 109, and the protection module 104, respectively. The filtering module 108 is electrically connected to the protection module 104, the output module 105, the control module 103, and the current limiting module 109, respectively. The current limiting module 109 is electrically connected to the control module 103, the output module 105, and the protection module 104, respectively.
[0031] The filtering module 108, the current limiting module 109, and the sampling module 107 work together to provide comprehensive protection and optimization for the battery protection board 10 circuit, preventing circuit failures caused by overvoltage, overcurrent, or abnormal temperature, improving the stability and reliability of the circuit, extending the service life of the equipment, and ensuring its normal operation under various working conditions.
[0032] In one embodiment, the sampling module 107 includes a sampling resistor RS1, the first end of which is electrically connected to the first end of the NTC sampling resistor, the current limiting module 109 and the filtering module 108, respectively, and the second end of the sampling resistor RS1 is electrically connected to the protection module 104 and the current limiting module 109.
[0033] In this embodiment, the voltage across the sampling resistor RS1 is sampled through the GND and VI pins of the control module 103 to obtain the voltage difference between the two ends. The real-time current value is then calculated using Ohm's law to monitor the current changes in the circuit and protect the circuit from damage caused by overcurrent or short circuit.
[0034] In one implementation, such as Figure 3 As shown, the filtering module 108 includes a first filtering submodule 1081, a second filtering submodule 1082, and a third filtering submodule 1083. The first filtering submodule 1081 is electrically connected to the control module 103, the current limiting module 109, and the sampling module 107, respectively; the second filtering submodule 1082 is electrically connected to the protection module 104; and the third filtering submodule 1083 is electrically connected to the output module 105, the current limiting module 109, and the protection module 104, respectively.
[0035] Specifically, such as Figure 3 As shown, the first filtering submodule 1081 includes a first filtering capacitor C1, a second filtering capacitor C2, and a third filtering capacitor C3; the second filtering submodule 1082 includes a fourth filtering capacitor C4; and the third filtering submodule 1083 includes a fifth filtering capacitor C5. The first terminal of the first filtering capacitor C1 is electrically connected to the current limiting module 109 and the control module 103, respectively. The second terminal of the first filtering capacitor C1 is electrically connected to the first terminal of the second filtering capacitor C2. The second terminal of the second filtering capacitor C2 is electrically connected to the control module 103 and the first terminal of the third filtering capacitor C3, respectively. The first terminal of the third filtering capacitor C3 is also electrically connected to the first terminal of the sampling resistor RS1, and the second terminal of the third filtering capacitor C3 is electrically connected to the current limiting module 109 and the control module 103, respectively. The first terminal of the fourth filtering capacitor C4 is electrically connected to the protection module 104, and the second terminal of the fourth filtering capacitor C4 is electrically connected to the protection module 104. The first end of the fifth filter capacitor C5 is electrically connected to the output module 105 and the current limiting module 109, respectively, and the second end of the fifth filter capacitor C5 is electrically connected to the current limiting module 109, the protection module 104 and the output module 105, respectively.
[0036] In one implementation, such as Figure 3 As shown, the current limiting module 109 includes: a first current limiting submodule 1091, a second current limiting submodule 1092, a third current limiting submodule 1093, and a fourth current limiting submodule 1094. Specifically, the first current limiting submodule 1091 is electrically connected to the filtering module 108 and the output module 105, the second current limiting submodule 1092 is electrically connected to the output module 105, the NTC detection module 106, and the sampling module 107, the third current limiting submodule 1093 is electrically connected to the filtering module 108, the sampling module 107, the control module 103, and the protection module 104, and the fourth current limiting submodule 1094 is electrically connected to the control module 103, the protection module 104, the filtering module 108, and the output module 105.
[0037] Specifically, the first current-limiting submodule 1091 includes a first current-limiting resistor R1, the second current-limiting submodule 1092 includes a second current-limiting resistor R2, the third current-limiting submodule 1093 includes a third current-limiting resistor R3, and the fourth current-limiting submodule 1094 includes a fourth current-limiting resistor R4. The first terminal of the first current-limiting resistor R1 is electrically connected to the first terminal of the fifth filter capacitor C5 and the output module 105, respectively, and the second terminal of the first current-limiting resistor R1 is electrically connected to the first terminal of the first filter capacitor C1 and the control module 103, respectively. The first terminal of the second current-limiting resistor R2 is electrically connected to the first terminal of the NTC detection module 106 and the sampling resistor RS1, respectively, and the second terminal of the second current-limiting resistor R2 is electrically connected to the NTC voltage sampling pin of the output module 105, respectively. The first terminal of the third current-limiting resistor R3 is electrically connected to the first terminal of the third filter capacitor C3 and the control module 103, respectively, and the second terminal of the third current-limiting resistor R3 is electrically connected to the second terminal of the sampling resistor RS1 and the protection module 104, respectively. The first end of the fourth current-limiting resistor R4 is electrically connected to the control module 103, and the second end of the fourth current-limiting resistor R4 is electrically connected to the protection module 104.
[0038] It should be noted that the protection module 104 includes two MOSFETs. The discharge control pin DSG of the control module 103 is electrically connected to the gate of the first MOSFET in the protection module 104, and the charging control pin CHG of the control module 103 is electrically connected to the gate of the second MOSFET in the protection module 104.
[0039] The control module 103 is a lithium battery protection IC that monitors key parameters such as battery voltage and current to ensure the battery operates within a safe range. When the battery experiences abnormal conditions such as overcharging, over-discharging, or short circuit, the control module 103 will quickly take measures, such as disconnecting the charging and discharging circuit by controlling the MOSFET in the protection module 104, to protect the battery from damage.
[0040] In this embodiment, the NTC detection module 106 provides real-time temperature information of the battery cell, helping to monitor and control its operating status and prevent performance degradation or damage due to excessive temperature. The filtering module 108, current limiting module 109, and sampling module 107 play crucial protective and optimization roles in the circuit. The filtering module 108 removes noise and interference from the signal, ensuring the accuracy of the sampled data. The current limiting module 109 limits the current magnitude to prevent excessive current from damaging the circuit. The combined effect of these modules provides comprehensive protection and optimization for the circuit, preventing malfunctions caused by overvoltage, overcurrent, or abnormal temperature. These measures improve circuit stability and reliability, extend equipment lifespan, and ensure normal operation under various working conditions.
[0041] Example 2 Based on the same technical concept as in Embodiment 1 above, this embodiment also provides a battery, such as... Figure 4 As shown, the battery includes the battery protection board 10 and the battery cell 200 in Embodiment 1. The positive electrode of the battery cell 200 is electrically connected to the positive electrode connection portion 101 of the battery protection board 10, and the negative electrode of the battery cell 200 is electrically connected to the negative electrode connection portion 102 of the battery protection board 10.
[0042] The battery provided in this embodiment reduces the number of signal lines and optimizes the wiring, thereby effectively reducing the size of the battery protection board and improving the battery's integration. This provides strong support for the miniaturization and lightweight design of the device.
[0043] It is understood that the implementation method of the battery protection board described in Embodiment 1 above is also applicable to this embodiment and can achieve the same technical effect, so it will not be described again here.
[0044] Example 3 Based on the same technical concept as Embodiment 2 above, this embodiment provides an energy storage device, such as... Figure 5 As shown, the energy storage device 30 includes the battery 20 in Embodiment 2.
[0045] The energy storage device provided in this embodiment can effectively prevent circuit failures caused by overvoltage, overcurrent, or abnormal temperature, greatly improving the stability and reliability of the circuit, extending the service life of the energy storage device, ensuring that the energy storage device can operate stably and normally under various complex working conditions, and enhancing the overall performance and market competitiveness of the product.
[0046] It is understood that the implementation method of the battery described in Embodiment 2 above is also applicable to this embodiment and can achieve the same technical effect, so it will not be described again here.
[0047] In summary, the battery protection board, battery, and energy storage device provided in this application significantly simplify the wiring layout by placing the B-terminal of the negative terminal connection close to the NTC detection module. This optimized layout not only makes the circuit structure clearer and reduces signal transmission path intersections and interference, but also facilitates subsequent circuit maintenance and troubleshooting. The detection pins on one end of the NTC detection module share existing cell voltage detection pins; this innovative design cleverly reduces additional signal lines. The reduction in signal lines directly lowers the complexity of the wiring, avoiding signal interference and crosstalk problems caused by excessive signal lines, thereby effectively improving the circuit's current-carrying capacity, ensuring stable and efficient current transmission, and reducing energy loss. Through the reduction of signal lines and optimized wiring, the size of the battery protection board can be effectively reduced, improving the battery's integration. Energy storage provides strong support for the miniaturization and lightweight design of the device. The energy storage device can effectively prevent circuit failures caused by overvoltage, overcurrent, or abnormal temperature, greatly improving circuit stability and reliability, extending the service life of the energy storage device, ensuring stable and normal operation under various complex working conditions, and enhancing the overall performance and market competitiveness of the product.
[0048] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0049] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A battery protection board, characterized in that, The battery protection board includes: a positive electrode connection part, a negative electrode connection part, a control module, a protection module, an output module, and an NTC detection module; The positive terminal connection is electrically connected to the control module and the output module, respectively; The protection module is electrically connected to the negative terminal connection, the control module, and the output module, respectively. One end of the NTC detection module is electrically connected to the cell voltage detection pin of the output module, and the cell voltage detection pin is used to detect the voltage of the negative terminal connection in real time. The other end of the NTC detection module is electrically connected to the NTC voltage sampling pin of the output module. The NTC voltage sampling pin is used to detect the voltage of the NTC detection module near the output module in real time.
2. The battery protection board according to claim 1, characterized in that, The battery protection board also includes: a sampling module, a filtering module, and a current limiting module; The sampling module is electrically connected to the negative terminal connection, the NTC detection module, the filtering module, the current limiting module, and the protection module, respectively. The filtering module is electrically connected to the protection module, the output module, the control module, and the current limiting module, respectively. The current limiting module is electrically connected to the control module, the output module, and the protection module, respectively.
3. The battery protection board according to claim 2, characterized in that, The NTC detection module includes: an NTC sampling resistor; The first end of the NTC sampling resistor is electrically connected to the cell voltage detection pin of the output module, and the first end of the NTC sampling resistor is electrically connected to the sampling module. The second end of the NTC sampling resistor is electrically connected to the NTC voltage sampling pin of the output module.
4. The battery protection board according to claim 3, characterized in that, The sampling module includes: a sampling resistor; The first terminal of the sampling resistor is electrically connected to the first terminal of the NTC sampling resistor, the current limiting module, and the filtering module, respectively. The second end of the sampling resistor is electrically connected to the protection module and the current limiting module.
5. The battery protection board according to claim 4, characterized in that, The filtering module includes: a first filtering submodule, a second filtering submodule, and a third filtering submodule; The first filtering submodule is electrically connected to the control module, the current limiting module, and the sampling module, respectively; The second filtering submodule is electrically connected to the protection module; The third filtering submodule is electrically connected to the output module, the current limiting module, and the protection module, respectively.
6. The battery protection board according to claim 5, characterized in that, The first filtering submodule includes: a first filtering capacitor, a second filtering capacitor, and a third filtering capacitor; the second filtering submodule includes: a fourth filtering capacitor; the third filtering submodule includes: a fifth filtering capacitor; The first terminal of the first filter capacitor is electrically connected to the current limiting module and the control module, respectively. The second terminal of the first filter capacitor is electrically connected to the first terminal of the second filter capacitor. The second terminal of the second filter capacitor is electrically connected to both the control module and the first terminal of the third filter capacitor. The first terminal of the third filter capacitor is also electrically connected to the first terminal of the sampling resistor; The second terminal of the third filter capacitor is electrically connected to the current limiting module and the control module, respectively; The first terminal of the fourth filter capacitor is electrically connected to the protection module. The second terminal of the fourth filter capacitor is electrically connected to the protection module. The first terminal of the fifth filter capacitor is electrically connected to the output module and the current limiting module, respectively; The second terminal of the fifth filter capacitor is electrically connected to the current limiting module, the protection module, and the output module, respectively.
7. The battery protection board according to claim 6, characterized in that, The current limiting module includes: a first current limiting submodule, a second current limiting submodule, a third current limiting submodule, and a fourth current limiting submodule; The first current limiting submodule is electrically connected to both the filtering module and the output module. The second current limiting submodule is electrically connected to the output module, the NTC detection module, and the sampling module, respectively. The third current limiting submodule is electrically connected to the filtering module, the sampling module, the control module, and the protection module, respectively. The fourth current-limiting submodule is electrically connected to the control module, the protection module, the filtering module, and the output module, respectively.
8. The battery protection board according to claim 7, characterized in that, The first current limiting submodule includes: a first current limiting resistor; the second current limiting submodule includes: a second current limiting resistor; the third current limiting submodule includes: a third current limiting resistor; the fourth current limiting submodule includes: a fourth current limiting resistor; The first terminal of the first current-limiting resistor is electrically connected to the first terminal of the fifth filter capacitor and the output module, respectively. The second end of the first current-limiting resistor is electrically connected to the first end of the first filter capacitor and the control module, respectively. The first end of the second current-limiting resistor is electrically connected to both the negative terminal connection and the first end of the sampling resistor. The second terminal of the second current-limiting resistor is electrically connected to the NTC voltage sampling pin; The first terminal of the third current-limiting resistor is electrically connected to the first terminal of the third filter capacitor and the control module, respectively. The second terminal of the third current-limiting resistor is electrically connected to the second terminal of the sampling resistor and the protection module, respectively. The first end of the fourth current-limiting resistor is electrically connected to the control module. The second end of the fourth current-limiting resistor is electrically connected to the protection module.
9. A battery, characterized in that, The battery includes a battery protection board and a battery cell as described in any one of claims 1-8, wherein the positive electrode of the battery cell is electrically connected to the positive electrode connection portion of the battery protection board, and the negative electrode of the battery cell is electrically connected to the negative electrode connection portion of the battery protection board.
10. An energy storage device, characterized in that, The energy storage device includes the battery as described in claim 9.