Shunt, battery management system, and vehicle
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
Smart Images
Figure CN224536011U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of current measurement 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 comprises a shunt, a sampling line, and a controller. The shunt communicates with the controller via the sampling line, and is used to collect the power battery's current signal in real time, enabling the controller to determine whether a fault has occurred in the power battery based on the collected current information.
[0003] The shunt includes a shunt plate, a circuit board, and a connector. The shunt plate includes a shunt body and a sampling pin protruding from the shunt body. The circuit board is disposed on the shunt body. The current plate has a fixing hole for the sampling pin to pass through. The sampling pin is soldered into the fixing hole. The connector is disposed on the circuit board. The connector has a plug interface. The end of the sampling line away from the controller is plugged into the plug interface.
[0004] In related technologies, shunts require relatively large mounting holes to accommodate solder during soldering. However, large mounting holes make it difficult to accurately position the circuit board when assembling the circuit board and the shunt plate, thus making it impossible to control the position of the connectors on the circuit board. Utility Model Content
[0005] Therefore, it is necessary to provide a shunt, a battery management system, and a vehicle to address the above problems. This shunt can accurately locate the circuit board, thereby facilitating the control of the position of the connectors on the circuit board.
[0006] Firstly, a shunt is provided, comprising:
[0007] The diverter plate includes a diverter body and a first fixing member and a second fixing member, both protruding from the diverter body; and
[0008] A circuit board is disposed on the shunt body, and a first fixing hole and a second fixing hole are respectively provided on the circuit board, the first fixing hole and the second fixing hole being distributed at intervals;
[0009] Wherein, at least a portion of the first fixing member protrudes from the diversion body and is disposed in the first fixing hole; along the first direction, both opposite sides of the first fixing member abut against the inner wall of the first fixing hole; along the second direction, at least one side of the first fixing member is spaced apart from the inner wall of the first fixing hole, and the second direction is perpendicular to the first direction;
[0010] The second fixing member protrudes from at least a portion of the diversion body and is disposed in the second fixing hole. Along the second direction, the opposite sides of the second fixing member abut against the inner wall of the second fixing hole; along the first direction, at least one side of the second fixing member is spaced apart from the inner wall of the first fixing hole.
[0011] In one embodiment, the first fixing hole and the second fixing hole are spaced apart along the second direction, and the first fixing hole and the second fixing hole are staggered in the first direction.
[0012] In one embodiment, the first fixing member includes a first limiting segment and a first connecting segment partially disposed in the first fixing hole. At least a portion of the first limiting segment is disposed on the side of the circuit board facing away from the diversion body. One end of the first connecting segment is connected to the diversion body, and the other end is connected to the first limiting segment.
[0013] And / or, the second fixing member includes a second limiting segment and a second connecting segment partially fixed in the second fixing hole, at least a portion of the second limiting segment is disposed on the side of the circuit board facing away from the diversion body, one end of the second connecting segment is connected to the diversion body, and the other end is connected to the second limiting segment.
[0014] In one embodiment, when the first fixing member includes a first limiting segment, the first limiting segment is an elastically deformable form, so that the first limiting segment can pass through the first fixing hole in the deformed state, and the first limiting segment can abut against the side of the circuit board facing away from the diversion body in the deformed state.
[0015] When the second fixing member includes a second limiting segment, the second limiting segment is an elastically deformable form, so that the second limiting segment can pass through the second fixing hole in the deformed state, and the second limiting segment can abut against the side of the circuit board facing away from the diversion body in the deformed state.
[0016] In one embodiment, at least one of the first limiting segment and the second limiting segment is provided with a deformation hole.
[0017] In one embodiment, when the first fixing member includes a first limiting segment, a guide surface is provided on the outer peripheral side of the first limiting segment, and the guide surface is used to guide the first limiting segment to be inserted into the first fixing hole;
[0018] And / or, when the second fastener includes a second limiting segment, a guide surface is provided on the outer periphery of the second limiting segment, the guide surface being used to guide the second limiting segment into the second fixing hole.
[0019] In one embodiment, when the first fixing member includes a first limiting segment, the guide surface on the first limiting segment includes a first inclined segment and a first arc segment. Along the direction from the diversion body to the circuit board, the first inclined segment and the first arc segment are distributed in sequence, and the first arc segment is connected to the first connecting segment through the first inclined segment. The first inclined segment is inclined outward from the direction from the diversion body to the circuit board.
[0020] And / or, the guide surface on the second limiting segment includes a second inclined segment and a second arc segment, which are distributed sequentially along the direction from the diversion body to the circuit board, and the second arc segment is connected to the second connecting segment through the second inclined segment. The second inclined segment is inclined outward from the direction from the diversion body to the circuit board.
[0021] In one embodiment, the diverter plate further includes at least one third fixing member protruding from the diverter body. The circuit board is provided with at least one third fixing hole. The third fixing member corresponds one-to-one with the third fixing hole. The third fixing holes are distributed at intervals with the first fixing hole and the second fixing hole, respectively. At least a portion of the third fixing member is located in the corresponding third fixing hole. Along the first direction, at least one side of the third fixing member is spaced apart from the inner wall of the third fixing hole. And along the second direction, at least one side of the third fixing member is spaced apart from the inner wall of the third fixing hole.
[0022] In one embodiment, the first fixing hole, the second fixing hole, and one of the third fixing holes are respectively distributed at three vertices of the same triangle.
[0023] In one embodiment, the third fixing member includes a third limiting segment and a third connecting segment partially fixed in the third fixing hole. At least a portion of the third limiting segment is disposed on the side of the circuit board facing away from the diversion body. One end of the third connecting segment is connected to the diversion body, and the other end is connected to the third limiting segment.
[0024] In one embodiment, when the third fixing member includes a third limiting segment, the third limiting segment is an elastically deformable form, allowing the third limiting segment to pass through the third fixing hole in the deformed state, and the third limiting segment to abut against the side of the circuit board facing away from the diverter body in the deformed state.
[0025] In one embodiment, the third limiting segment is provided with a deformation hole.
[0026] In one embodiment, a guide surface is provided on the outer periphery of the third limiting segment, the guide surface being used to guide the third limiting segment into the third fixing hole.
[0027] In one embodiment, the guide surface on the third limiting segment includes a third inclined segment and a third arc segment. Along the direction from the diversion body to the circuit board, the third inclined segment and the third arc segment are distributed sequentially, and the third arc segment is connected to the third connecting segment through the third inclined segment. The third inclined segment is inclined outward from the direction from the diversion body to the circuit board.
[0028] In one embodiment, a sampling foot is also included, wherein the sampling foot is the first fixing member, the second fixing member, or the third fixing member.
[0029] In one embodiment, the sampling pin has two parts, one of which is the first fixing member or the second fixing member, and the other is the third fixing member.
[0030] In one embodiment, one of the two sampling feet is the second fixing member.
[0031] In one embodiment, the shunt body includes a sampling section and a conductive section connected to the sampling section. The first, second, or third fixing member of the sampling foot is connected to the sampling section, and the remaining first, second, or third fixing members are connected to the conductive section.
[0032] In one embodiment, the two sampling feet are spaced apart along the second direction, and the two sampling feet are staggered in the first direction.
[0033] In one embodiment, the shunt plate further includes a support protrusion that protrudes from the shunt body on the side facing the circuit board and supports the circuit board.
[0034] Secondly, a battery management system is also provided, including a controller and the aforementioned shunt, wherein the shunt is communicatively connected to the controller.
[0035] Thirdly, a vehicle is also provided, including a power battery and the aforementioned battery management system, wherein the battery management system is communicatively connected to the power battery.
[0036] The aforementioned distributor, through the cooperation of the first fixing member with the first fixing hole and the second fixing member with the second fixing hole, can restrict the movement of the circuit board relative to the distributor plate along its width and length during the assembly of the circuit board and the distributor plate, achieving precise positioning of the circuit board. This effectively controls the position of the connectors on the circuit board and simultaneously meets the space requirements for accommodating and fixing materials between the first fixing member and the circuit board, and between the second fixing member and the circuit board. Furthermore, since the first fixing member and the first fixing hole have accommodating cavities between their inner walls along the length direction of the distributor plate, and the second fixing member and the second fixing hole have accommodating cavities along the width direction of the distributor plate, it is not required that the same fixing member simultaneously adhere to the inner walls of the holes along both the length and width directions of the distributor plate. By setting the first fixing member and the first fixing hole, and the second fixing member and the second fixing hole to be non-clearance fit in two different directions, the shunt plate and the circuit board can be precisely positioned in two directions respectively. At the same time, it can avoid the over-positioning problem that may be caused by the precise fit of the first fixing member and the first fixing hole, and the second fixing member and the second fixing hole in two directions. This reduces the processing accuracy of the shunt plate and the circuit board, thereby reducing the processing difficulty of the shunt and facilitating the assembly of the shunt plate and the circuit board. Attached Figure Description
[0037] Figure 1 This is a top view of a splitter in some embodiments of this application.
[0038] Figure 2 for Figure 1 Enlarged view of point A in the middle.
[0039] Figure 3 for Figure 1 Enlarged view of point B in the middle.
[0040] Figure 4 for Figure 1 A cross-sectional view along the CC direction.
[0041] Figure 5 for Figure 1 A cross-sectional view along the DD direction.
[0042] Figure 6 for Figure 1 A cross-sectional view along the EE direction.
[0043] Figure 7 for Figure 1 A cross-sectional view along the FF direction.
[0044] Figure 8 This is a top view of the circuit board and connector in some embodiments of this application.
[0045] Figure 9This is a side view of a splitter in some embodiments of this application.
[0046] Figure 10 This is a top view of the shunt chip in some embodiments of this application.
[0047] In the picture:
[0048] 1. Diverter plate; 11. Diverter body; 111. Sampling section; 112. Conductive section; 12. First fixing member; 121. First connecting section; 122. First limiting section; 1221. First inclined section; 1222. First arc-shaped section; 13. Second fixing member; 14. Third fixing member; 141. Third connecting section; 142. Third limiting section; 1421. Third inclined section; 1422. Third arc-shaped section; 15. Support protrusion; 2. Circuit board; 21. First fixing hole; 22. Second fixing hole; 23. Third fixing hole; 3. Connector; 100. Deformation hole; 200. Accommodating cavity; 300. Guide surface. Detailed Implementation
[0049] 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.
[0050] 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.
[0051] 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.
[0052] 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.
[0053] 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.
[0054] 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.
[0055] 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, a sampling line, and a shunt, with the shunt communicatively connected to the controller via the sampling line.
[0056] A shunt is an instrument used to measure current. Its measurement principle is to directly measure the voltage across the shunt, and then, according to Ohm's law, divide the measured voltage by the resistance of the shunt to obtain the current value in the circuit for current detection. The sampling line transmits the measured current to the controller, and the controller determines whether the power battery has malfunctioned based on the current information collected by the sampling line, thereby realizing circuit protection.
[0057] See Figure 1 , Figure 1A top view of a splitter in some embodiments of this application is shown. The splitter includes a splitter plate 1 and a circuit board 2. The splitter plate 1 includes a splitter body 11 and a first fixing member 12 and a second fixing member 13, both protruding from the splitter body 11. The circuit board 2 is disposed on the splitter body 11, see reference. Figure 8 , Figure 8 A top view of a circuit board and connector in some embodiments of this application is shown. A first fixing hole 21 and a second fixing hole 22 are respectively provided on the circuit board 2, and the first fixing hole 21 and the second fixing hole 22 are spaced apart. See reference. Figure 2 and Figure 4 , Figure 2 for Figure 1 Enlarged view of point A in the middle. Figure 4 for Figure 1 A cross-sectional view along the CC direction shows that at least a portion of the first fixing member 12 protrudes from the diversion body 11 and is disposed in the first fixing hole 21. Along the first direction, both opposite sides of the first fixing member 12 abut against the inner wall of the first fixing hole 21. (See reference...) Figure 5 , Figure 5 for Figure 1 A cross-sectional view along the DD direction, in the second direction, at least one side of the first fixing member 12 is spaced from the inner wall of the first fixing hole 21 to form a receiving cavity 200 for receiving and fixing material, the second direction being perpendicular to the first direction. (See reference...) Figure 3 and Figure 7 , Figure 3 for Figure 1 Enlarged view at point B in the middle. Figure 7 for Figure 1 A cross-sectional view along the FF direction shows that at least a portion of the second fixing member 13 protrudes from the diversion body 11 and is disposed in the second fixing hole 22. Along the second direction, both opposite sides of the second fixing member 13 abut against the inner wall of the second fixing hole 22. (See reference...) Figure 6 , Figure 6 for Figure 1 A cross-sectional view along the EE direction, in the first direction, the second fastener 13 is spaced apart from the first fastening hole 21 to form a receiving cavity 200 for receiving and fixing materials.
[0058] It should be noted that in this application, the first direction is the width direction of the splitter 1, that is, the direction indicated by the X arrow in the figure, and the second direction is the length direction of the splitter 1, that is, the direction indicated by the Y arrow in the figure.
[0059] In actual implementation, in order to realize the communication connection between the splitter and the controller through the acquisition line, the splitter also includes a connector 3 set on the side of the circuit board 2 facing away from the splitter body 11. The end of the acquisition line away from the controller has a plug, which is inserted into the interface of the connector 3 to realize the communication connection between the splitter and the controller.
[0060] When assembling the splitter 1 and the circuit board 2, the first fixing member 12 is fixed in the first fixing hole 21 by fixing material, and the second fixing member 13 is fixed in the second fixing hole 22 by fixing material. The fixing material provides a bonding effect between the fixing member and the inner wall of the fixing hole, thereby preventing the fixing member from detaching from the circuit board 2, thus fixing the fixing member in the corresponding fixing hole. It should be noted that the fixing material is a liquid or gel state under the set conditions. In actual implementation, the fixing material enters the first fixing hole 21 and the second fixing hole 22 in a liquid or gel state, and can solidify from a liquid or gel state to a solid state in the first fixing hole 21 and the second fixing hole 22, so that the fixing material can bond between the fixing member and the circuit board 2, thereby firmly connecting the fixing member to the circuit board 2. For example, when the fixing material is solder (e.g., solder), the high temperature during welding causes the solder to melt into a liquid state and enter the first fixing hole 21 and the second fixing hole 22. After a certain period of time, the solder cools and solidifies, thereby welding the fixing component to the circuit board 2, so that the fixing component and the circuit board 2 are firmly connected. When the fixing material is adhesive, after the adhesive enters the first fixing hole 21 and the second fixing hole 22, it is cured by light, high temperature or oxidation, etc., and forms an adhesive layer between the fixing component and the circuit board 2, thereby making the fixing component and the circuit board 2 firmly connected.
[0061] The first fixing member 12 is configured such that its two opposite sides abut against the inner wall of the first fixing hole 21 in the width direction (i.e., the direction indicated by the X arrow) of the flow divider 1, allowing the first fixing member 12 to fit tightly against the two inner walls of the first fixing hole 21 in the width direction of the flow divider 1, thus restricting the movement of the circuit board 2 relative to the flow divider 1 in the width direction of the flow divider 1. Since there is a receiving cavity 200 between the first fixing member 12 and the inner wall of the first fixing hole 21 in the second direction (i.e., there is a gap between the first fixing member 12 and the inner wall of the first fixing hole 21 in the length direction of the flow divider 1), this receiving cavity 200 can accommodate and fix materials, thereby enabling the circuit board 2 to... A fastener 12 and a circuit board 2 provide a bonding force, allowing the first fastener 12 to be fixed in the first fixing hole 21. The two opposite sides of the second fastener 13 abut against the inner wall of the second fixing hole 22 in the length direction of the diverter 1, so that the second fastener 13 can fit tightly against the inner walls of the two holes of the second fixing hole 22 in the length direction of the diverter 1, restricting the movement of the circuit board 2 relative to the diverter 1 in the length direction of the diverter 1. Since there is a receiving cavity 200 between the second fastener 13 and the inner wall of the second fixing hole 22 in the first direction, the receiving cavity 200 can accommodate and fix materials, so that the second fastener 13 is fixed in the second fixing hole 22.
[0062] This type of distributor, through the cooperation of the first fixing member 12 with the first fixing hole 21 and the second fixing member 13 with the second fixing hole 22, restricts the movement of the circuit board 2 relative to the distributor 1 along the width and length of the distributor 1 during the assembly process of the circuit board 2 and the distributor plate 1, achieving precise positioning of the circuit board 2. This effectively controls the position of the connector 3 on the circuit board 2, while also meeting the space requirements for accommodating and fixing materials between the first fixing member 12 and the circuit board 2, and between the second fixing member 13 and the circuit board 2. Furthermore, since the first fixing member 12 and the first fixing hole 21 have a receiving cavity 200 between their inner walls in the length direction of the distributor 1, and the second fixing member 13 and the second fixing hole 22 have a receiving cavity 200 between their inner walls in the width direction of the distributor 1, it is not required that the same fixing member be tightly attached to the inner walls of the holes in both the length and width directions of the distributor 1. In general, by setting the first fixing member 12 and the first fixing hole 21 and the second fixing member 13 and the second fixing hole 22 to be non-clearance fit in two different directions, the splitter plate 1 and the circuit board 2 can be accurately positioned in two directions respectively. At the same time, it can avoid the over-positioning problem that may be caused by the precise fit of the first fixing member 12 and the first fixing hole 21 and the second fixing member 13 and the second fixing hole 22 in two directions. This reduces the processing accuracy of the splitter plate 1 and the circuit board 2, thereby reducing the processing difficulty of the splitter and facilitating the assembly of the splitter plate 1 and the circuit board 2.
[0063] To increase the spacing between the first fixing member 12 and the second fixing member 13 within the limited space on the circuit board 2, refer to... Figure 1 and Figure 8 The first fixing hole 21 and the second fixing hole 22 are spaced apart along the second direction, and are staggered in the first direction. It can be understood that each first fixing hole 21 is fixed with a first fixing member 12, and each second fixing hole 22 is fixed with a second fixing member 13. The spaced-apart distribution of the first fixing holes 21 and the staggered distribution of the first fixing holes 21 and 22 along the second direction, along with the staggered distribution in the first direction, results in the first fixing members 12 and 13 being diagonally distributed on the circuit board 2, leading to better positioning.
[0064] In one example, one first fixing member 12 and one second fixing member 13 are each provided, and correspondingly, one first fixing hole 21 and one second fixing hole 22 are also provided, to prevent over-positioning and increase the difficulty of assembling the circuit board 2 and the shunt plate 1. Of course, the number of the first fixing member 12, the second fixing member 13, the first fixing hole 21 and the second fixing hole 22 can be flexibly adjusted as needed in actual implementation, and there is no specific limitation here.
[0065] In some embodiments, see Figure 4 and Figure 5 The first fixing member 12 includes a first limiting segment 122 and a first connecting segment 121 partially fixed in the first fixing hole 21. At least a portion of the first limiting segment 122 is disposed on the side of the circuit board 2 facing away from the diverter body 11. One end of the first connecting segment 121 is connected to the diverter body 11, and the other end is connected to the first limiting segment 122. Thus, with the cooperation of the first limiting segment 122 and the diverter body 11, the movement of the circuit board 2 along a third direction can be restricted. The third direction is perpendicular to the first direction and the second direction, respectively. In this embodiment, after the circuit board 2 and the diverter piece 1 are assembled, the first limiting segment 122 abuts against the side of the circuit board 2 facing away from the diverter body 11, preventing the circuit board 2 from moving along the third direction.
[0066] It should be noted that in this application, the third direction is the height direction of the shunt segment 1, that is, the direction indicated by the Z arrow in the figure.
[0067] The first connecting section 121 is fixed in the first fixing hole 21, so that the first fixing member 12 is fixedly connected to the circuit board 2; the first limiting section 122 is set to abut against the side of the circuit board 2 facing away from the diverter body 11. Since the circuit board 2 is set on the diverter body 11, the circuit board 2 can be restricted from moving along the height direction of the diverter plate 1 under the combined action of the first limiting section 122 and the circuit board 2, so that the circuit board 2 is close to the diverter body 11, further improving the assembly accuracy of the circuit board 2 and the diverter plate 1.
[0068] In some embodiments, see Figure 6 and Figure 7The second fixing member 13 includes a second limiting section (not shown in the figure) and a second connecting section (not shown in the figure) partially fixed in the second fixing hole 22. At least a portion of the second limiting section is disposed on the side of the circuit board 2 facing away from the diverter body 11. One end of the second connecting section is connected to the diverter body 11, and the other end is connected to the second limiting section. After the circuit board 2 and the diverter piece 1 are assembled, the circuit board 2 is located between the second limiting section and the diverter body 11. The cooperation between the second limiting section and the diverter body 11 can restrict the movement of the circuit board 2 along a third direction, which is perpendicular to the first direction and the second direction, respectively. In actual implementation, after the circuit board 2 and the diverter piece 1 are assembled, the second limiting section abuts against the side of the circuit board 2 facing away from the diverter body 11 to prevent the circuit board 2 from moving along the third direction. The second connecting section is fixed in the second fixing hole 22, so that the second fixing member 13 is fixedly connected to the circuit board 2. The second limiting section of the second fixing member 13 is set to abut against the side of the circuit board 2 facing away from the diversion body 11. Since the circuit board 2 is set on the diversion body 11, the circuit board 2 can be restricted from moving along the height direction of the diversion piece 1 under the combined action of the second limiting section and the circuit board 2, so that the circuit board 2 is close to the diversion body 11, further improving the assembly accuracy of the circuit board 2 and the diversion piece 1.
[0069] In actual implementation, the first fixing member 12 is soldered into the first fixing hole 21, and the second fixing member 13 is soldered into the second fixing hole 22. During specific assembly, the first fixing member 12 on the shunt plate 1 is inserted into the first fixing hole 21, and the second fixing member 13 is inserted into the second fixing hole 22, achieving pre-assembly of the circuit board 2 and the shunt plate 1. After the circuit board 2 and the shunt plate 1 form an assembly, the assembly is placed with the circuit board 2 facing down and the shunt body 11 facing up (i.e., the assembly is inverted). Then, solder is used to attach the first fixing member 12 to the first fixing hole 21 and the second fixing member 13 to the second fixing hole 22, allowing the first fixing member 12 and the second fixing member 13 to absorb solder. The first limiting segment 122 and the second limiting segment are pressed against the side of the circuit board 2 facing away from the shunt body 11, preventing the circuit board 2 from detaching from the shunt body 11 when the assembly is inverted. This eliminates the need for auxiliary tooling to position the circuit board 2, improving the assembly efficiency of the circuit board 2 and the shunt plate 1.
[0070] In one example, when the first fixing member 12 includes a first connecting segment 121, the dimension of the first connecting segment 121 in the first direction is equal to the dimension of the first fixing hole 21 in the first direction, such that the first connecting segment 121 and the inner wall of the first fixing hole 21 in the width direction of the diverter 1 abut against each other. The dimension of the first connecting segment 121 in the second direction is smaller than the dimension of the first fixing hole 21 in the second direction, such that there is a gap between the first connecting segment 121 and the inner wall of the first fixing hole 21 in the length direction of the diverter 1, thereby forming a receiving cavity 200 between the first fixing member 12 and the inner wall of the first fixing hole 21.
[0071] In other examples, when the first connecting segment 121 is an elastically deformable form, the size of the first connecting segment 121 in the first direction can be set to be larger than the size of the first fixing hole 21 in the first direction. During the assembly of the circuit board 2 and the shunt plate 1, the external force drives the first connecting segment 121 to undergo elastic deformation in the first direction, and the size of the first connecting segment 121 in the first direction decreases, so that the first connecting segment 121 can pass through the first fixing hole 21 and can make the opposite sides of the first connecting segment 121 abut against the inner wall of the first fixing hole 21 in the first direction.
[0072] When the second fixing member 13 includes a second connecting section, in one example, the size of the second connecting section in the second direction is equal to the size of the second fixing hole 22 in the second direction, so that the second connecting section and the inner wall of the second fixing hole 22 in the length direction of the diverter 1 abut against each other; the size of the second connecting section in the first direction is smaller than the size of the fixing hole in the first direction, so that there is a gap between the second connecting section and the inner wall of the second fixing hole 22 in the width direction of the diverter 1, thereby forming a receiving cavity 200 between the second fixing member 13 and the inner wall of the second fixing hole 22.
[0073] Of course, in other examples, when the second connecting segment is elastically deformed, the size of the second connecting segment in the second direction can be set to be larger than the size of the second fixing hole 22 in the second direction. During the assembly of the circuit board 2 and the shunt plate 1, the external force drives the second connecting segment to undergo elastic deformation in the second direction, and the size of the second connecting segment in the second direction decreases, so that the second connecting segment can pass through the first fixing hole 21 and can make the two opposite sides of the second connecting segment in the first direction abut against the inner wall of the second fixing hole 22.
[0074] In some embodiments, when the first fixing member 12 includes a first limiting segment 122, the first limiting segment 122 is an elastically deformable form, so that the first limiting segment 122 can pass through the first fixing hole 21 in the deformed state, and the first limiting segment 122 can abut against the side of the circuit board 2 facing away from the diversion body 11 in the deformed state.
[0075] When the second fixing member 13 includes a second limiting section, the second limiting section is an elastically deformable form, allowing it to pass through the second fixing hole 22 in the deformed state, and to abut against the side of the circuit board 2 facing away from the diversion body 11 in the deformed state. In this embodiment, the connecting section and the limiting section of the same fixing member are an integral structure. Since the limiting section is an elastically deformable form, the cross-sectional size of the limiting section can be adjusted by squeezing the limiting section.
[0076] Both the first limiting segment 122 and the second limiting segment have a deformed state and a deformed recovery state. When the limiting segment is in the deformed recovery state, the maximum cross-sectional dimension of the limiting segment is greater than the maximum cross-sectional dimension of the corresponding fixing hole, and the limiting segment cannot pass through the corresponding fixing hole. When the limiting segment is in the deformed state, the limiting segment is compressed and deformed, making the maximum cross-sectional dimension of the limiting segment smaller than the maximum cross-sectional dimension of the corresponding fixing hole, and the limiting segment can pass through the corresponding fixing hole. By setting the limiting segment as an elastic body, during the assembly of the circuit board 2 and the diverter plate 1, the limiting segment can be forced through the corresponding fixing hole by compression. After passing through the corresponding fixing hole, the limiting segment can automatically recover to the deformed recovery state, thus allowing it to automatically abut against the side of the circuit board 2 facing away from the diverter body 11, facilitating the assembly of the circuit board 2 and the diverter plate 1.
[0077] It should be noted that the deformation state of the first limiting segment 122 refers to the state in which the first limiting segment 122 is deformed, and the deformation recovery state of the first limiting segment 122 refers to the state in which the first limiting segment 122 is restored to the state before the deformation; the deformation state of the second limiting segment refers to the state in which the second limiting segment is deformed, and the deformation recovery state of the second limiting segment refers to the state in which the second limiting segment is restored to the state before the deformation.
[0078] In this application, the maximum cross-sectional dimension of the first limiting segment 122 is the maximum dimension of the cross section obtained by cutting the first limiting segment 122 along the plane parallel to the circuit board 2; the maximum cross-sectional dimension of the second limiting segment is the maximum dimension of the cross section obtained by cutting the second limiting segment along the plane parallel to the circuit board 2; the maximum cross-sectional dimension of the first fixing hole 21 refers to the maximum dimension obtained by cutting the first fixing hole 21 along the plane parallel to the circuit board 2; the maximum cross-sectional dimension of the second fixing hole 22 refers to the maximum dimension obtained by cutting the second fixing hole 22 along the plane parallel to the circuit board 2.
[0079] In some embodiments, see Figure 4 , Figure 5 and Figure 7The first limiting segment 122 is provided with a deformation hole 100. The second limiting segment is provided with a deformation hole 100. By providing deformation holes 100 on the limiting segments, space for deformation of the limiting segments can be provided. Of course, in other examples, deformation holes 100 may be provided only on the first limiting segment 122 or only on the second limiting segment as needed.
[0080] For ease of assembly of circuit board 2 and shunt plate 1, please refer to... Figure 5 and Figure 7 A guide surface 300 is provided on the outer periphery of the first limiting segment 122, which guides the first limiting segment 122 into the first fixing hole 21. A guide surface 300 is provided on the outer periphery of the second limiting segment, which guides the second limiting segment into the second fixing hole 22. Of course, in other examples, the guide surface 300 may be provided only on the outer periphery of the first limiting segment 122 or only on the outer periphery of the second limiting segment.
[0081] In actual implementation, the first fixing member 12 and the diversion body 11, as well as the second fixing member 13 and the diversion body 11, are all integral structures. The parts of the first fixing member 12 and the second fixing member 13 that extend from the diversion body 11 are usually bent and formed, which has processing errors. This will cause the height of the limiting section of the first fixing member 12 and the limiting section of the second fixing member 13 to be inconsistent.
[0082] See Figure 5 When the first fixing member 12 includes the first limiting segment 122, the guide surface 300 on the first limiting segment 122 includes the first inclined segment 1221 and the first arc segment 1222. Along the direction from the diversion body 11 to the circuit board 2, the first inclined segment 1221 and the first arc segment 1222 are distributed in sequence, and the first arc segment 1222 is connected to the first connecting segment 121 through the first inclined segment 1221. The first inclined segment 1221 is inclined outward from the direction from the diversion body 11 to the circuit board 2.
[0083] When the second fixing member 13 includes a second limiting section, the guide surface 300 on the second limiting section includes a second inclined section and a second arc-shaped section. Along the direction from the diverting body 11 to the circuit board 2, the second inclined section and the second arc-shaped section are sequentially distributed, and the second arc-shaped section is connected to the second connecting section via the second inclined section. The second inclined section is inclined outward from the direction from the diverting body 11 to the circuit board 2. After the circuit board 2 and the diverting piece 1 are assembled into place, the first arc-shaped section 1222 on the first fixing member 12 and the second inclined section on the second fixing member 13 abut against the circuit board 2.
[0084] By tilting the first inclined segment 1221 outward from the direction of the diverter body 11 pointing towards the circuit board 2 towards the outside of the first limiting segment 122, and by tilting the second inclined segment outward from the direction of the diverter body 11 pointing towards the circuit board 2 towards the outside of the second limiting segment, the effect caused by the inconsistency in height between the first limiting segment 122 and the second limiting segment can be offset, so that each limiting segment can effectively limit the circuit board 2. Since the outer surface of the arc segment is smoothly transitioned, the limiting segment can be guided by the arc segment to be inserted into the corresponding fixing hole, which is beneficial to the assembly of the diverter plate 1 and the circuit board 2.
[0085] Of course, in other examples, only the guide surface 300 on the first limiting segment 122 may be set to include the first limiting segment 122 and the first arc segment 1222, or only the guide surface of the second limiting segment may be set to include the second limiting segment and the second arc segment.
[0086] It should be noted that, in actual implementation, the deformation hole 100 may be provided only in the first limiting segment 122 or only in the second limiting segment, as needed.
[0087] In some embodiments, see Figure 1 , Figure 7 , Figure 8 , Figure 9 and Figure 10 The diverter plate 1 also includes at least one third fixing member 14 protruding from the diverter body 11. The circuit board 2 has at least one third fixing hole 23, with each third fixing member 14 corresponding to a third fixing hole 23. The third fixing holes 23 are spaced apart from the first fixing hole 21 and the second fixing hole 22, respectively. At least a portion of the third fixing member 14 is located within its corresponding third fixing hole 23. Along a first direction, i.e., along the width direction of the diverter plate 1, at least one side of the third fixing member 14 is spaced apart from the inner wall of the third fixing hole 23. And along a second direction, i.e., along the length direction of the diverter plate 1, at least one side of the third fixing member 14 is spaced apart from the inner wall of the third fixing hole 23. Since the third fixing member 14 is spaced apart from the inner wall of the third fixing hole 23 on at least one side of the width and length directions of the diverter plate 1, on the one hand, when assembling the circuit board 2 and the diverter plate 1, a gap can be reserved between the third fixing member 14 and the circuit board 2 to adjust the relative position of the circuit board 2 and the diverter plate 1, which is beneficial for assembly. On the other hand, there is a space for filling and fixing material between the third fixing member 14 and the inner wall of the third fixing hole 23, which is beneficial for fixing the circuit board 2 and the diverter plate 1.
[0088] The first fixing hole 21, the second fixing hole 22, and one of the third fixing holes 23 are respectively distributed on the three vertices of the same triangle. This distribution of the first fixing hole 21, the second fixing hole 22, and the third fixing hole 23 is beneficial for providing a better positioning effect for the circuit board 2.
[0089] Furthermore, combined Figure 7 The third fixing member 14 includes a third limiting section 142 and a third connecting section 141 partially fixed in the third fixing hole 23. The third limiting section 142 is disposed on the side of the circuit board 2 facing away from the diversion body 11. One end of the third connecting section 141 is connected to the diversion body 11, and the other end is connected to the third limiting section 142 on the side of the circuit board 2 facing away from the diversion body 11. Thus, with the cooperation of the third limiting section 142 and the diversion body 11, the movement of the circuit board 2 along a third direction can be restricted. The third direction is perpendicular to the first direction and the second direction, that is, the third direction is the height direction of the diversion piece 1. In this embodiment, after the circuit board 2 and the diversion piece 1 are assembled, the third limiting section 142 abuts against the side of the circuit board 2 facing away from the diversion body 11 to prevent the circuit board 2 from moving along the third direction.
[0090] In order to facilitate the insertion of the third fixing member 14 into the third fixing hole 23, when the third fixing member 14 includes the third limiting section 142, the third limiting section 142 is an elastic deformation form, so that the third limiting section 142 can pass through the third fixing hole 23 in the deformation state, and the third limiting section 142 can abut against the side of the circuit board 2 facing away from the diversion body 11 in the deformation recovery state.
[0091] Combination Figure 7 In order to provide deformation space in the third limiting segment 142, the third limiting segment 142 is provided with a deformation hole 100.
[0092] In some embodiments, a guide surface 300 is provided on the outer periphery of the third limiting segment 142. The guide surface 300 is used to guide the third limiting segment 142 into the third fixing hole 23. During the assembly of the circuit board 2 and the diverter 1, the guide surface 300 can guide the third limiting segment 142 to insert through the third fixing hole 23. During the process of the third limiting segment 142 passing through the third fixing hole 23, the inner wall of the third fixing hole 23 squeezes the third limiting segment 142, causing the third limiting segment 142 to deform and thus smoothly pass through the third fixing hole 23 and extend to the side of the circuit board 2 away from the diverter body 11.
[0093] Furthermore, the guide surface 300 on the third limiting segment 142 includes a third inclined segment 1421 and a third arc-shaped segment 1422. Along the direction from the diversion body 11 to the circuit board 2, the third inclined segment 1421 and the third arc-shaped segment 1422 are sequentially distributed, and the third arc-shaped segment 1422 is connected to the third connecting segment 141 via the third inclined segment 1421. The third inclined segment 1421 is inclined outward from the direction from the diversion body 11 to the circuit board 2 towards the third limiting segment 142. By inclining the third inclined segment 1421 outward from the direction from the diversion body 11 to the circuit board 2 towards the third limiting segment 142, the influence caused by the inconsistent heights of the first limiting segment 122, the second limiting segment, and the third limiting segment 142 can be offset, so that the limiting segment on the third fixing member 14 can effectively limit the circuit board 2.
[0094] See Figure 10 The shunt body 11 includes a sampling section 111 and two conductive sections 112, which are connected to both ends of the sampling section 111 along the length of the shunt plate 1. The conductive sections 112 are made of low resistivity materials, such as copper or brass, while the sampling section 111 is made of high resistivity materials, such as manganin. In actual implementation, the shunt plate 1 also includes sampling pins connected to the sampling section 111.
[0095] The sampling pin is either the first fixing member 12, the second fixing member 13, or the third fixing member 14. When there are two sampling pins, one is the first fixing member 12 or the second fixing member 13, and the other is the third fixing member 14. In this way, the first fixing member 12 or the second fixing member 13, which is one of the sampling pins, can provide a positioning reference for the circuit board 2. The other sampling pin (i.e., the third fixing member 14) has sufficient space to fill with fixing material between itself and the inner wall of the third fixing hole. This ensures the connection strength between the sampling pin and the circuit board 2, absorbs tolerances, avoids over-positioning of the sampling pin and the circuit board 2, and facilitates the assembly of the shunt plate 1 and the circuit board 2.
[0096] When there are two sampling pins, the shunt is collecting current. The two sampling pins are connected to the sampling circuit respectively, and the sampling circuit is used to sample the voltage across the sampling section 111.
[0097] In one example, one sampling pin is the second fixing member 13, and the other sampling pin is the third fixing member 14. In this example, there are two third fixing members 14, one of which is a sampling pin. In actual implementation, the connector 3 is inserted externally along the first direction. By setting the second fixing member 13 as a sampling pin, the circuit board 2 and the sampling pin can be limited and matched along the second direction, which can accurately position the position of the circuit board 2 in the second direction, and thus position the connector 3 in the second direction, ensuring that the connector 3 can be reliably inserted externally.
[0098] When the shunt body 11 includes a sampling section 111 and a conductive section 112, the first fixing member 12, the second fixing member 13, or the third fixing member 14, which are sampling pins, is connected to the sampling section 111, and the remaining first fixing members 12, the second fixing members 13, or the third fixing members 14 are connected to the conductive section 112. For example, when the first fixing member 12 and the third fixing member 14 are sampling pins, the first fixing member 12 and one of the third fixing members 14 are both connected to the sampling section 111, and the second fixing member 13 and the other third fixing member 14 are both connected to the conductive section 112; or, when the second fixing member 13 and one of the third fixing members 14 are sampling pins, the second fixing member 13 and the third fixing member 14 are both connected to the sampling section 111, and the first fixing member 12 and the other third fixing member 14 are both connected to the conductive section 112.
[0099] Of course, in other examples, the number of third fasteners 14 can also be set to one or three, etc.
[0100] To facilitate the molding of the sampling foot, the material of the sampling foot can be set to be the same as that of the sampling segment 111, so that the sampling foot and the sampling segment 111 can be processed in one piece.
[0101] The first fixing member 12 serving as a sampling pin is a conductor, and the first fixing member 12 not serving as a sampling pin can be either a conductor or an insulator; similarly, the second fixing member 13 serving as a sampling pin is a conductor, and the second fixing member 13 not serving as a sampling pin can be either a conductor or an insulator; similarly, the third fixing member 14 serving as a sampling pin is a conductor, and the third fixing member 14 not serving as a sampling pin can be either a conductor or an insulator.
[0102] In one example, when there are two sampling pins, the two sampling pins are distributed at intervals along the second direction and staggered in the first direction. This makes the two sampling pins diagonally distributed on the circuit board 2, which helps to increase the distance between the two sampling pins in the limited space on the circuit board 2, prevents the solder from sticking due to the small distance between the two sampling pins, and reduces the risk of electrical conduction between the two sampling pins.
[0103] In some embodiments, reference is made to Figure 6 , Figure 9 and Figure 10The shunt plate 1 also includes a support protrusion 15, which protrudes from the shunt body 11 on the side facing the circuit board 2 and supports the circuit board 2. By supporting the circuit board 2 with the support protrusion 15, a large area of support between the shunt body 11 and the circuit board 2 is avoided, achieving precise positioning of the circuit board in the height direction of the shunt plate 1. The number of support protrusions 15 can be one, two, three, or four. In this example, the number of support protrusions 15 is set to four, with the four support protrusions 15 spaced apart. By providing two or more support protrusions 15, the positioning accuracy of the circuit board 2 in the height direction of the shunt plate 1 is improved.
[0104] Understandably, some shunt circuit boards 2 have electronic components, such as thermistors, on the side facing the shunt body 11. By placing the thermistor on the side of the circuit board 2 facing the shunt body 11, the temperature of the sampling segment 111 of the shunt body 11 can be sampled more accurately. To prevent the electronic components from interfering with the assembly of the circuit board 2, the support protrusion 15 protrudes from the side of the shunt body 11 at a greater height than the electronic components protruding from the side of the shunt body 11.
[0105] In the battery management system of this application, the precise positioning of the circuit board 2 and the shunt plate 1 is achieved by the cooperation of the first fixing member 12 with the first fixing hole 21 and the second fixing member 13 with the second fixing hole 22, thereby effectively controlling the position of the connector 3 on the circuit board 2, which is beneficial to improving the consistency of the battery management system.
[0106] In some embodiments, a vehicle is also provided. The vehicle includes a power battery and the aforementioned battery management system, the battery management system being communicatively connected to the power battery. The vehicle can monitor the power battery through the battery management system, thereby improving the vehicle's safety performance.
[0107] The means of transportation can be new energy vehicles, but is not limited to new energy vehicles.
[0108] 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.
[0109] 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 diverter plate includes a diverter body and a first fixing member and a second fixing member, both of which protrude from the diverter body; and A circuit board is disposed on the shunt body, and a first fixing hole and a second fixing hole are respectively provided on the circuit board, the first fixing hole and the second fixing hole being distributed at intervals; Wherein, at least a portion of the first fixing member protrudes from the diversion body and is disposed in the first fixing hole; along the first direction, both opposite sides of the first fixing member abut against the inner wall of the first fixing hole; along the second direction, at least one side of the first fixing member is spaced apart from the inner wall of the first fixing hole, and the second direction is perpendicular to the first direction; The second fixing member protrudes from at least a portion of the diversion body and is disposed in the second fixing hole. Along the second direction, the opposite sides of the second fixing member abut against the inner wall of the second fixing hole; along the first direction, at least one side of the second fixing member is spaced apart from the inner wall of the first fixing hole.
2. The shunt according to claim 1, characterized in that, The first fixing hole and the second fixing hole are distributed at intervals along the second direction, and the first fixing hole and the second fixing hole are staggered in the first direction.
3. The shunt according to claim 1, characterized in that, The first fixing member includes a first limiting section and a first connecting section partially disposed in the first fixing hole. At least a portion of the first limiting section is disposed on the side of the circuit board facing away from the diversion body. One end of the first connecting section is connected to the diversion body, and the other end is connected to the first limiting section. And / or, the second fixing member includes a second limiting segment and a second connecting segment partially fixed in the second fixing hole, at least a portion of the second limiting segment is disposed on the side of the circuit board facing away from the diversion body, one end of the second connecting segment is connected to the diversion body, and the other end is connected to the second limiting segment.
4. The shunt according to claim 3, characterized in that, When the first fixing member includes a first limiting segment, the first limiting segment is an elastically deformable form, so that the first limiting segment can pass through the first fixing hole in the deformed state, and the first limiting segment can abut against the side of the circuit board facing away from the diversion body in the deformed state. When the second fixing member includes a second limiting segment, the second limiting segment is an elastically deformable form, so that the second limiting segment can pass through the second fixing hole in the deformed state, and the second limiting segment can abut against the side of the circuit board facing away from the diversion body in the deformed state.
5. The shunt according to claim 4, characterized in that, At least one of the first limiting segment and the second limiting segment is provided with a deformation hole.
6. The shunt according to claim 3, characterized in that, When the first fixing member includes a first limiting segment, a guide surface is provided on the outer periphery of the first limiting segment, and the guide surface is used to guide the first limiting segment to be inserted into the first fixing hole; And / or, when the second fastener includes a second limiting segment, a guide surface is provided on the outer periphery of the second limiting segment, the guide surface being used to guide the second limiting segment into the second fixing hole.
7. The shunt according to claim 6, characterized in that, When the first fixing member includes a first limiting segment, the guide surface on the first limiting segment includes a first inclined segment and a first arc segment. Along the direction from the diversion body to the circuit board, the first inclined segment and the first arc segment are distributed in sequence, and the first arc segment is connected to the first connecting segment through the first inclined segment. The first inclined segment is inclined outward from the direction from the diversion body to the circuit board. And / or, the guide surface on the second limiting segment includes a second inclined segment and a second arc segment, which are distributed sequentially along the direction from the diversion body to the circuit board, and the second arc segment is connected to the second connecting segment through the second inclined segment. The second inclined segment is inclined outward from the direction from the diversion body to the circuit board.
8. The shunt according to claim 1, characterized in that, The diverter plate further includes at least one third fixing member protruding from the diverter body. The circuit board is provided with at least one third fixing hole. The third fixing member corresponds one-to-one with the third fixing hole. The third fixing holes are distributed at intervals with the first fixing hole and the second fixing hole, respectively. At least a portion of the third fixing member is located in the corresponding third fixing hole. Along the first direction, at least one side of the third fixing member is spaced apart from the inner wall of the third fixing hole. And along the second direction, at least one side of the third fixing member is spaced apart from the inner wall of the third fixing hole.
9. The shunt according to claim 8, characterized in that, The first fixing hole, the second fixing hole, and one of the third fixing holes are respectively distributed on the three vertices of the same triangle.
10. The shunt according to claim 8, characterized in that, The third fixing member includes a third limiting section and a third connecting section that is partially fixed in the third fixing hole. At least a portion of the third limiting section is disposed on the side of the circuit board facing away from the diversion body. One end of the third connecting section is connected to the diversion body, and the other end is connected to the third limiting section.
11. The shunt according to claim 10, characterized in that, When the third fixing member includes a third limiting segment, the third limiting segment is an elastically deformable form, so that the third limiting segment can pass through the third fixing hole in the deformed state, and the third limiting segment can abut against the side of the circuit board facing away from the diverter body in the deformed state.
12. The shunt according to claim 11, characterized in that, The third limiting segment is provided with a deformation hole.
13. The shunt according to claim 10, characterized in that, The outer periphery of the third limiting segment is provided with a guide surface, which is used to guide the third limiting segment into the third fixing hole.
14. The shunt according to claim 13, characterized in that, The guide surface on the third limiting segment includes a third inclined segment and a third arc segment. Along the direction from the diversion body to the circuit board, the third inclined segment and the third arc segment are distributed sequentially, and the third arc segment is connected to the third connecting segment through the third inclined segment. The third inclined segment is inclined outward from the direction from the diversion body to the circuit board.
15. The shunt according to claim 10, characterized in that, It also includes a sampling foot, which is the first fixing member, the second fixing member, or the third fixing member.
16. The shunt according to claim 15, characterized in that, The sampling pin has two parts, one of which is the first fixing member or the second fixing member, and the other is the third fixing member.
17. The shunt according to claim 16, characterized in that, One of the two sampling feet is the second fixing member.
18. The shunt according to claim 15, characterized in that, The shunt body includes a sampling section and a conductive section connected to the sampling section. The first, second, or third fixing member of the sampling foot is connected to the sampling section, and the remaining first, second, or third fixing members are connected to the conductive section.
19. The shunt according to claim 16, characterized in that, The two sampling pins are spaced apart along the second direction, and the two sampling pins are staggered in the first direction.
20. The shunt according to any one of claims 1 to 19, characterized in that, The shunt plate also includes a support protrusion that protrudes from the side of the shunt body facing the circuit board and supports the circuit board.
21. A battery management system, characterized in that, It includes a controller and a splitter as described in any one of claims 1 to 20, wherein the splitter is communicatively connected to the controller.
22. A means of transportation, characterized in that, It includes a power battery and the battery management system as described in claim 21, wherein the battery management system is communicatively connected to the power battery.