Shunt, battery management system, and vehicle
By setting a support protrusion on the conductive section of the shunt body to form an accommodating space for installing a temperature sensor, the problem of inaccurate temperature sensor sensing is solved, achieving high-precision measurement and cost reduction of the shunt.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN HONGFA ELECTRIC POWER CONTROLS CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-21
AI Technical Summary
In existing shunts, the temperature sensor cannot accurately sense the temperature near the resistance section, resulting in poor measurement accuracy.
A support protrusion is provided on the conductive section of the shunt body. The end of the support protrusion away from the conductive section abuts against the circuit board to form an accommodating space. The temperature sensor is installed on the side of the circuit board facing the shunt body, so that it partially protrudes from the circuit board and is closer to the resistance section to improve the temperature sensing accuracy.
High-precision temperature compensation for the shunt was achieved, which improved measurement accuracy, shortened the development cycle, and reduced costs.
Smart Images
Figure CN224536026U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of current detection technology, and in particular to a shunt, a battery management system, and a vehicle. Background Technology
[0002] The battery management system (BMS) is a crucial component of new energy vehicles, serving as a bridge connecting the power battery and the vehicle as a whole. The BMS includes a shunt and a controller that communicates with the shunt. The shunt collects the current signal from the power battery in real time, enabling the controller to determine whether a battery malfunction has occurred based on the collected current information.
[0003] Some shunts include a shunt plate, a circuit board, and a temperature sensor. The shunt plate includes a shunt body and a mounting foot connected to the shunt body. The mounting foot protrudes from the shunt body along its thickness direction. The circuit board is located on one side of the shunt body in the thickness direction, and the mounting foot is soldered into the circuit board, fixing the circuit board relative to the shunt body. The temperature sensor is located on the side of the circuit board facing away from the shunt body. When current flows through the shunt plate, the resistance value of the resistive section in the shunt body changes with temperature. The temperature sensor can perform temperature compensation on the resistive section, improving the voltage sampling accuracy of the shunt.
[0004] However, in the shunts of related technologies, the temperature sensor cannot accurately sense the temperature near the resistance section, resulting in poor measurement accuracy of the shunt. Utility Model Content
[0005] Therefore, it is necessary to provide a shunt, a battery management system, and a vehicle to address the above problems. The shunt has high measurement accuracy, which is beneficial for the battery management system to monitor and manage the power battery.
[0006] On the one hand, a shunt is provided, comprising:
[0007] The shunt plate includes a shunt body and a support protrusion that protrudes at least partially from the shunt body. The shunt body includes a resistive segment and two conductive segments. The resistive segment is connected between the two conductive segments. The support protrusion is provided on at least one of the two conductive segments.
[0008] A circuit board is located on one side of the current splitter body, and the circuit board abuts against the end of the support protrusion away from the conductive segment, so that an accommodating space is formed between the circuit board and the current splitter body;
[0009] And a temperature sensor, the temperature sensor being disposed on the side of the circuit board facing the shunt body, and at least a portion of the temperature sensor protruding from the circuit board toward the accommodating space.
[0010] In one embodiment, at least a portion of the circuit board is opposite the resistor segment, and the temperature sensor is disposed on the portion of the circuit board opposite the resistor segment.
[0011] In one embodiment, along the direction from the shunt body to the circuit board, the protrusion of the support protrusion from the shunt body is larger than the protrusion of the temperature sensor from the circuit board.
[0012] In one embodiment, at least two support protrusions are provided on the same conductive segment, and the at least two support protrusions on the same conductive segment are spaced apart along a direction perpendicular to one of the conductive segments and pointing to the other conductive segment.
[0013] In one embodiment, the shunt plate further includes a sampling pin disposed on the resistor segment, the sampling pin being connected to the circuit board.
[0014] In one embodiment, the sampling pin is disposed on one side of the resistor segment in a set direction, the set direction being perpendicular to the direction of the shunt body pointing to the circuit board and the direction of one of the conductive segments pointing to another conductive segment. The sampling pin includes a first segment, a second segment, and a third segment connected in sequence. The first segment and the third segment form an angle, and the end of the first segment away from the second segment is connected to the resistor segment. The second segment is arc-shaped. The third segment is connected to the circuit board, and the end of the third segment away from the first segment protrudes from the side of the circuit board facing away from the shunt plate. Along the direction of the shunt body pointing to the circuit board, the support protrusion protrudes from the second segment, or the support protrusion is flush with the second segment.
[0015] In one embodiment, the support protrusion is integrally formed with the conductive segment.
[0016] In one embodiment, the resistive segment is a manganese-copper sheet;
[0017] And / or, the conductive segment is a copper sheet.
[0018] In one embodiment, a connector is also included, which is disposed on the side of the circuit board opposite to the temperature sensor.
[0019] On the other hand, a pool management system is also provided, including a controller and the aforementioned splitter, wherein the splitter is communicatively connected to the controller.
[0020] Furthermore, another means of transportation is provided, including a power battery and the aforementioned battery management system, wherein the battery management system is communicatively connected to the power battery.
[0021] The aforementioned shunt features a support protrusion on the conductive section of the shunt body. The end of the support protrusion furthest from the conductive section abuts against the circuit board, providing support for the circuit board and facilitating control of its flatness, thus ensuring stable mounting of the circuit board on one side of the shunt body. Since the support protrusion at least partially protrudes from the shunt body, and its furthest end abuts against the circuit board, a space is created between the circuit board and the shunt body. This space provides mounting space for a temperature sensor, allowing it to be mounted on the side of the circuit board facing the shunt body. Furthermore, at least a portion of the temperature sensor protrudes from the circuit board towards the space, thus reducing the distance between the temperature sensor and the resistive section of the shunt body. This allows the temperature sensor to more accurately sense the temperature near the resistive section, achieving high-precision temperature compensation for the shunt and improving its measurement accuracy. Additionally, placing the support protrusion on the conductive section avoids affecting the resistance value of the resistive section, shortening the shunt's development cycle and reducing its development cost. Attached Figure Description
[0022] Figure 1 This is a top view of the splitter described in some embodiments of this application.
[0023] Figure 2 for Figure 1 A cross-sectional view along the AA direction.
[0024] Figure 3 This is a side view of the splitter described in some embodiments of this application.
[0025] Figure 4 for Figure 3 Enlarged view of point B in the middle.
[0026] Figure 5 This is a top view of the shunt plate described in some embodiments of this application.
[0027] Figure 6 This is a side view of the shunt plate described in some embodiments of this application.
[0028] In the picture;
[0029] 1. Shunt plate; 11. Shunt body; 111. Conductive section; 112. Resistive section; 12. Support protrusion; 13. Fixing foot; 14. Sampling foot; 141. First section; 142. Second section; 143. Third section; 2. Circuit board; 21. Fixing hole; 3. Temperature sensor; 4. Connector; 100. Accommodation space. Detailed Implementation
[0030] 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.
[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.
[0032] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0033] 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 based on the specific circumstances.
[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0036] The battery management system is an important component of new energy vehicles, serving as a bridge connecting the power battery and the vehicle as a whole. One embodiment of this application provides a battery management system including a controller and a shunt, with the shunt communicating with the controller.
[0037] See Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 This is a top view of the splitter in some embodiments of this application; Figure 2 for Figure 1 A cross-sectional view along the AA direction; Figure 3 This is a side view of the splitter in some embodiments of this application; Figure 4 for Figure 3 Enlarged view at point B. The shunt includes a shunt plate 1, a circuit board 2, and a temperature sensor 3. (Combined) Figure 5 and Figure 6 , Figure 5 This is a top view of the shunt chip in some embodiments of this application; Figure 6This is a side view of a shunt plate in some embodiments of this application. The shunt plate 1 includes a shunt body 11 and a support protrusion 12. The shunt body 11 includes a resistive segment 112 and two conductive segments 111. The resistive segment 112 is connected between the two conductive segments 111. At least one of the two conductive segments 111 is provided with the support protrusion 12. In this embodiment, both conductive segments 111 are provided with the support protrusion 12. Of course, in actual implementation, the support protrusion 12 can be provided on only one conductive segment 111 as needed. The circuit board 2 is on one side of the shunt body 11. The circuit board 2 abuts against the end of the support protrusion 12 away from the conductive segment 111, so that an accommodating space 100 is formed between the circuit board 2 and the shunt body 11. The temperature sensor 3 is disposed on the side of the circuit board 2 facing the shunt body 11, and at least a portion of the temperature sensor 3 protrudes from the circuit board 2 toward the accommodating space 100.
[0038] In actual implementation, the voltage across the resistor segment 112 of the shunt main body 11 is sampled, and then, according to Ohm's law, the sampled voltage is divided by the resistance value of the shunt to obtain the current value in the circuit, thereby realizing current detection. The measured current is then transmitted to the controller, which determines whether the power battery has malfunctioned based on the received current information, thereby realizing the monitoring and management of the power battery and thus achieving circuit protection.
[0039] In this type of shunt, a support protrusion 12 is provided on the conductive section 111 of the shunt body 11. The end of the support protrusion 12 away from the conductive section 111 abuts against the circuit board 2. The support protrusion 12 supports the circuit board 2, which helps to control the flatness of the circuit board 2, thereby allowing the circuit board 2 to be stably installed on one side of the shunt body 11. Since the support protrusion 12 at least partially protrudes from the shunt body 11, and the end of the support protrusion 12 away from the conductive section 111 abuts against the circuit board 2, there is an accommodating space 100 between the circuit board 2 and the shunt body 11. The accommodating space 100 provides installation space for the temperature sensor 3, thereby allowing the temperature sensor 3 to be installed on the side of the circuit board 2 facing the shunt body 11, and allowing at least a part of the temperature sensor 3 to protrude from the circuit board 2 towards the accommodating space 100. This shortens the distance between the temperature sensor 3 and the resistive section 112 of the shunt body 11, so the temperature sensor 3 can more accurately sense the temperature near the resistive section 112, achieving high-precision temperature compensation for the shunt and improving the measurement accuracy of the shunt.
[0040] In some embodiments, see Figure 5 and Figure 6 The diverter plate 1 also includes a fixing foot 13, which is connected to the diverter body 11. (See reference...) Figure 2The circuit board 2 is provided with a fixing hole 21, and a portion of the fixing foot 13 is soldered into the fixing hole 21, so that the circuit board 2 is fixed relative to the shunt body 11. In this example, there are two fixing feet 13, and the two fixing feet 13 are respectively connected to the two conductive segments 111 in a one-to-one correspondence, and the two fixing feet 13 are respectively distributed on the opposite sides of the shunt body 11.
[0041] Continue reading Figure 5 and Figure 6 The shunt 1 also includes sampling pins 14, of which there are at least two. Both sampling pins 14 are disposed on the resistor segment 112 and are spaced apart. Each sampling pin 14 corresponds one-to-one with a mounting hole 21 on the circuit board 2. The sampling pins 14 are soldered into their corresponding mounting holes 21 to achieve connection between the sampling pins 14 and the circuit board 2. In this example, there are two sampling pins 14, both integrally formed with the resistor segment 112, resulting in a stable connection between the sampling pins 14 and the resistor segment 112 and better material consistency. Of course, in other examples, the number of sampling pins 14 may be set to three or four, etc., and two of the sampling pins 14 are selected for connection to the sampling circuit during sampling.
[0042] Furthermore, sampling pin 14 is positioned on one side of resistor segment 112 in the set direction, which is perpendicular to the direction from shunt body 11 to circuit board 2 and the direction from one conductive segment 111 to another conductive segment 111. (See reference...) Figure 2 and Figure 5 The X arrow points in the direction of the current shunt 11 pointing towards the circuit board 2, the Z arrow points in the direction of the current shunt 11 pointing towards the circuit board 2, and the Y arrow points in the direction of one conductive segment 111 pointing towards another conductive segment 111. The sampling pin 14 includes a first segment 141, a second segment 142, and a third segment 143 connected in sequence. The first segment 141 and the third segment 143 form an angle. The first segment 141 is connected to the resistor segment 112, and the third segment 143 is connected to the circuit board 2. The end of the third segment 143 furthest from the first segment 141 protrudes from the side of the circuit board 2 facing away from the current shunt 1. In this example, the first segment 141 and the third segment 143 are perpendicular, and the third segment 143 is soldered into the corresponding fixing hole 21. An arc-shaped second segment 142 is provided between the first segment 141 and the third segment 143, creating a smooth transition between them. Along the direction from the shunt body 11 to the circuit board 2 (i.e., the direction indicated by the Z arrow), the support protrusion 12 protrudes from the second section 142, or the support protrusion 12 is flush with the second section 142. In this way, the circuit board 2 can be stably supported by the support protrusion 12, and the arc-shaped second section 142 can be avoided from causing positional interference to the circuit board 2 when assembling the shunt. This is beneficial for controlling the flatness of the circuit board 2 and the shunt plate 1.
[0043] The resistive section 112 is made of a high-resistivity material, such as manganin, while the conductive section 111 is made of a low-resistivity material, such as copper or brass. In this embodiment, the resistive section 112 is a manganin sheet, and the conductive section 111 is a copper sheet. One conductive section 111 is the current inlet, and the other conductive section 111 is the current outlet. The resistive section 112 is the sampling section. The shunt measures the voltage across the sampling resistive section 112, and based on the sampled voltage and Ohm's law, the current flowing through the shunt can be calculated.
[0044] Understandably, during the actual development of the shunt, the resistance value of resistor segment 112 is predetermined according to requirements, for example, a predetermined resistance value of 50 ohms. Therefore, during development, the shape of resistor segment 112 needs to be designed based on the predetermined resistance value and relevant formulas. After the resistor segment 112 is fabricated, it is then verified to ensure that its resistance value meets the requirements. If the support protrusion 12 is placed on the resistor segment 112, its presence will interfere with the resistor segment 112, which is detrimental to its design. After assembling the resistor segment 112 and the support protrusion 12 into a single unit, the voltage across the resistor segment 112 needs to be measured multiple times, and the dimensions of the support protrusion 12 need to be adjusted multiple times to ensure the resistance value meets the design requirements. This will significantly extend the development cycle of the shunt.
[0045] In the separator of this application, the support protrusion 12 is provided on the conductive section 111, which avoids the presence of the support protrusion 12 affecting the resistance value of the resistive section 112, which helps to shorten the development cycle of the shunt and thus reduce the development cost of the shunt.
[0046] The temperature sensor 3 mainly senses the temperature of the resistance section 112 of the shunt body 11. In order to enable the temperature sensor 3 to sense the temperature near the resistance section 112 more accurately, at least a part of the circuit board 2 is opposite to the resistance section 112. The temperature sensor 3 is set at the part of the circuit board 2 opposite to the resistance section 112. This allows the temperature sensor 3 to be as close as possible to the resistance section 112, thereby enabling the temperature sensor 3 to provide higher accuracy temperature compensation.
[0047] In some embodiments, see Figure 2 Along the direction from the shunt body 11 to the circuit board 2, the protrusion of the supporting protrusion 12 from the shunt body 11 is larger than the protrusion of the temperature sensor 3 from the circuit board 2. This ensures that the accommodating space 100 between the circuit board 2 and the shunt body 11 is sufficient to accommodate the temperature sensor 3, preventing the temperature sensor 3 from touching the shunt body 11 and being damaged. The direction indicated by arrow Z in the figure is the direction from the shunt body 11 to the circuit board 2.
[0048] Because the circuit board 2 is relatively large, at least two support protrusions 12 are provided on each conductive segment 111 to ensure that the circuit board 2 rests smoothly against the support protrusions 12. These support protrusions 12 are spaced apart along a direction perpendicular to the direction from one conductive segment 111 to the other. This allows the circuit board 2 to be supported by at least two support protrusions 12 on the same conductive segment 111, reducing the risk of tilting. In this example, there are two support protrusions 12 on the same conductive segment 111. Of course, in other examples, the number of support protrusions 12 on the same conductive segment 111 can be set to three, four, or five, etc. The direction indicated by the Y-arrow in the figure is the direction from one conductive segment 111 to another.
[0049] To reduce the complexity of assembling the conductive segment 111 and the supporting protrusion 12, the supporting protrusion 12 and the conductive segment 111 can be integrally formed. If the conductive segment 111 is made of copper, the supporting protrusion 12 can also be made of copper. This allows the supporting protrusion 12 to be formed directly on the sheet material used to process the conductive segment 111 by stamping, which facilitates the processing of the supporting protrusion 12.
[0050] Of course, in other examples, the support protrusion 12 can also be fixed to the conductive segment 111 by welding, injection molding or structural components (such as screws).
[0051] It should be noted that the material of the support protrusion 12 can be either a conductor or an insulator. No specific restrictions are made on the conductivity of the support protrusion 12 here.
[0052] For example, temperature sensor 3 is a thermistor, which has high thermal sensitivity and can accurately sense the temperature near the resistance segment 112.
[0053] In other examples, the temperature sensor 3 can also be configured as a thermocouple resistor, a digital temperature sensor 3, or an integrated circuit temperature sensor 3, etc. There is no specific limitation on the type of temperature sensor 3.
[0054] In some embodiments, see Figure 1 and Figure 2The shunt also includes a connector 4 and a data acquisition line. The connector 4 is located on the side of the circuit board 2 opposite to the temperature sensor 3. When the shunt is used in a battery management system, one end of the data acquisition line connects to the controller, and the other end is plugged into the connector 4's interface, enabling communication between the shunt and the controller. Positioning the connector 4 on the side of the circuit board 2 opposite to the temperature sensor 3, with the temperature sensor 3 and connector 4 distributed on opposite sides of the circuit board 2, fully utilizes the space on both sides of the circuit board 2, which helps to reduce the size of the circuit board 2 and thus the overall size of the shunt.
[0055] In this type of battery management system, since the supporting protrusion 12 at least partially protrudes from the shunt body 11, and the end of the supporting protrusion 12 away from the conductive section 111 abuts against the circuit board 2, there is an accommodating space 100 between the circuit board 2 and the shunt body 11. The existence of the accommodating space 100 provides installation space for the temperature sensor 3, thereby enabling the temperature sensor 3 to be installed on the side of the circuit board 2 facing the shunt body 11. This brings the temperature sensor 3 closer to the resistive section 112 of the shunt body 11, allowing for more accurate sensing of the temperature near the resistive section 112, achieving high-precision temperature compensation for the shunt, which is beneficial for the battery management system to monitor and manage the power battery.
[0056] In another embodiment, a vehicle is also provided, including a power battery and a battery management system of any of the above-described structures. The battery management system is communicatively connected to the power battery, and performs detection and management of the power battery through the battery management system, thereby ensuring the safe operation of the vehicle. It should be noted that the vehicle can be a new energy vehicle, or an electric scooter, electric tricycle, etc.
[0057] 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.
[0058] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent 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 protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A shunt, characterized in that, include: The shunt plate includes a shunt body and a support protrusion that protrudes at least partially from the shunt body. The shunt body includes a resistive segment and two conductive segments. The resistive segment is connected between the two conductive segments. The support protrusion is provided on at least one of the two conductive segments. A circuit board is located on one side of the current splitter body, and the circuit board abuts against the end of the support protrusion away from the conductive segment, so that an accommodating space is formed between the circuit board and the current splitter body; And a temperature sensor, the temperature sensor being disposed on the side of the circuit board facing the shunt body, and at least a portion of the temperature sensor protruding from the circuit board toward the accommodating space.
2. The shunt according to claim 1, characterized in that, At least a portion of the circuit board is opposite to the resistor segment, and the temperature sensor is disposed on the portion of the circuit board opposite to the resistor segment.
3. The shunt according to claim 1, characterized in that, Along the direction from the shunt body to the circuit board, the size of the support protrusion protruding from the shunt body is larger than the size of the temperature sensor protruding from the circuit board.
4. The shunt according to claim 1, characterized in that, At least two support protrusions are provided on the same conductive segment, and the at least two support protrusions on the same conductive segment are distributed at intervals along a direction perpendicular to one of the conductive segments and pointing to the other conductive segment.
5. The shunt according to claim 1, characterized in that, The shunt plate also includes a sampling pin disposed on the resistor segment, and the sampling pin is connected to the circuit board.
6. The shunt according to claim 5, characterized in that, The sampling pin is disposed on one side of the resistor segment in a set direction, which is perpendicular to the direction of the shunt body pointing to the circuit board and the direction of one of the conductive segments pointing to another conductive segment. The sampling pin includes a first segment, a second segment, and a third segment connected in sequence. The first segment and the third segment form an angle, and the end of the first segment away from the second segment is connected to the resistor segment. The second segment is arc-shaped. The third segment is connected to the circuit board, and the end of the third segment away from the first segment protrudes from the side of the circuit board facing away from the shunt plate. Along the direction of the shunt body pointing to the circuit board, the support protrusion protrudes from the second segment, or the support protrusion is flush with the second segment.
7. The shunt according to claim 1, characterized in that, The supporting protrusion is integrally formed with the conductive segment.
8. The shunt according to any one of claims 1 to 7, characterized in that, The resistor segment is a manganese copper sheet; And / or, the conductive segment is a copper sheet.
9. The shunt according to any one of claims 1 to 7, characterized in that, The temperature sensor is a thermistor.
10. The shunt according to any one of claims 1 to 7, characterized in that, It also includes a connector disposed on the side of the circuit board opposite to the temperature sensor.
11. A battery management system, characterized in that, It includes a controller and a splitter as described in any one of claims 1 to 10, wherein the splitter is communicatively connected to the controller.
12. A means of transportation, characterized in that, It includes a power battery and the battery management system as described in claim 11, wherein the battery management system is communicatively connected to the power battery.