Shunt module, current acquisition system and circuit, and vehicle

Abstract

Provided in the embodiments of the present application are a shunt module, a current acquisition system and circuit, and a vehicle. The shunt module comprises: a plurality of electrically conductive connectors arranged in sequence; and a plurality of signal conversion components, wherein different signal conversion components among the plurality of signal conversion components are arranged between two different and adjacent electrically conductive connectors; each of the signal conversion components is provided with a first sampling point; and the first sampling point is configured to acquire electrical signals.

Description

Shunt module, current acquisition system, circuit and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202322441243.6 filed on September 8, 2023, entitled “Shunter module, current acquisition system, circuit and vehicle,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of battery management systems, and in particular to a shunt module, a current acquisition system, a circuit, and a vehicle. Background Art

[0004] With the rapid development of the new energy vehicle industry, battery management system testing is particularly important, especially the need for real-time monitoring of current data while the vehicle is driving and charging. Currently, current detection typically uses two independent circuits: a shunt module current sampling circuit and a Hall sensor current sampling circuit for primary and redundant sampling. This results in a large current sampling module structure, making it difficult to miniaturize.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a shunt module, a current acquisition system, a circuit, and a vehicle to solve the technical problem of the large size of the current sampling module.

[0007] In a first aspect, an embodiment of the present application provides a splitter module, comprising:

[0008] A plurality of conductive connecting members, wherein the plurality of conductive connecting members are arranged in sequence;

[0009] A plurality of signal conversion components, wherein different signal conversion components are arranged between two different adjacent conductive connecting components, and each signal conversion component is provided with a first sampling point, and the sampling point is used to collect electrical signals.

[0010] In this embodiment, the current splitter module can include sequentially arranged conductive connectors and multiple signal conversion components. The multiple signal conversion components enable multi-channel sampling. Thus, the current splitter module alone can perform both primary and redundant sampling, achieving current detection. This reduces structural size and facilitates miniaturization. Furthermore, the use of Hall effect sensors for sampling is avoided, reducing interference during the sampling process and thereby improving current sampling accuracy.

[0011] In some embodiments, the plurality of conductive connecting elements are spaced apart from each other, and the signal conversion element is located in at least a portion of the space between two adjacent conductive connecting elements.

[0012] In this embodiment, by arranging multiple conductive connectors at intervals from each other and positioning the signal converter within at least a portion of the interval between two adjacent conductive connectors, mutual interference between signals generated on the conductive connectors can be reduced, thereby improving sampling accuracy.

[0013] In some embodiments, the signal conversion component is disposed between each two adjacent conductive connecting components.

[0014] In this embodiment, by arranging the signal conversion component between each two adjacent conductive connectors, that is, a signal conversion component is arranged between each two adjacent conductive connectors, the structure of the diverter module can be made more compact, the structural size is further reduced, and miniaturization is facilitated.

[0015] In some embodiments, the diverter module further comprises:

[0016] a circuit board, the circuit board being disposed on one side of the plurality of conductive connecting members, and the plurality of signal conversion members being connected to the circuit board;

[0017] The first signal transmission component is disposed on the circuit board, and the first signal transmission component is electrically connected to the first sampling point of each of the signal conversion components.

[0018] In this embodiment, the circuit board can realize the electrical connection between the various components of the diverter module, and the first signal transmission component can be used to transmit the electrical signal collected by the signal conversion component, which simplifies the assembly work, reduces wiring, achieves the purpose of saving space, further reduces the structural size, and is conducive to miniaturization.

[0019] In some embodiments, the diverter module further comprises:

[0020] Multiple temperature sensors are correspondingly arranged at the multiple signal conversion components, and the multiple temperature sensors are connected to the circuit board. Each of the temperature sensors is provided with a second sampling point, and the second sampling point is used to collect the temperature of the signal conversion component.

[0021] In this embodiment, the temperature sensor can collect the temperature of the signal conversion component so as to subsequently compensate for the temperature drift of the signal conversion component, thereby improving the sampling accuracy of the signal conversion component and further improving the current detection accuracy.

[0022] In some embodiments, the diverter module further comprises:

[0023] Calibration mark, the calibration mark is set on the circuit board.

[0024] In this embodiment, the initial resistance value of the shunt module and the temperature compensation coefficient can be calibrated by the calibration mark to avoid subsequent sampling deviation and improve the current sampling accuracy.

[0025] In some embodiments, a third sampling point is provided on each of the plurality of conductive connecting members;

[0026] The diverter module further includes:

[0027] A plurality of second signal transmission elements are provided at the third sampling points of the plurality of conductive connecting elements, and each second signal transmission element is electrically connected to its corresponding third sampling point.

[0028] In this embodiment, the electrical signals collected by the third sampling points of the plurality of conductive connectors may be transmitted through the plurality of second signal transmission members, so that the diverter module can transmit the collected electrical signals in a more flexible and diverse manner.

[0029] In some embodiments, the second signal transmitting member comprises:

[0030] a connecting plate, the connecting plate being attached to and connected to at least a portion of the conductive connecting member, the third sampling point being located within the at least portion of the region;

[0031] The transmission part is formed by extending the connecting plate, and the transmission part is electrically connected to the conductive connecting member through the connecting plate, and the transmission part is used to transmit the electrical signal collected by the conductive connecting member.

[0032] In this embodiment, the transmission part is electrically connected through a connecting plate connected to the conductive connector, and the connecting plate is attached to at least a partial area of ​​the conductive connector including the third sampling point, which can increase the contact area between the signal transmission part and the conductive connector, thereby making the connection between the signal transmission part and its corresponding conductive connector more secure and improving the stability of the diverter module.

[0033] In some embodiments, the transmitting portion includes at least one pin.

[0034] In this embodiment, by providing at least one pin on the transmission portion, connection with an external device can be achieved through the pin, which facilitates operation during the signal transmission process.

[0035] In some embodiments, different signal conversion components have different structural features.

[0036] In this embodiment, different signal converters are provided with different structural features, thereby facilitating identification of multiple signal converters. When sampling, the sampled object can be determined based on the structural features of each signal converter, thereby improving sampling efficiency.

[0037] In a second aspect, an embodiment of the present application provides a current acquisition system, comprising:

[0038] batteries and sampling plates;

[0039] and the diverter module according to the first aspect;

[0040] Among them, the battery and the sampling plate are respectively connected to the diverter module.

[0041] In this embodiment, the current acquisition system can include the aforementioned shunt module. Thus, the shunt module alone can perform both primary and redundant sampling, achieving current detection. This reduces the structural size and facilitates miniaturization. Furthermore, the use of Hall effect sensors for sampling is avoided, reducing interference during the sampling process and thereby improving current sampling accuracy.

[0042] In a third aspect, an embodiment of the present application provides a current acquisition circuit, comprising:

[0043] A plurality of sampling modules, wherein the plurality of sampling modules are arranged corresponding to the plurality of signal conversion components in the diverter module according to the first aspect;

[0044] A main control module is used to connect to the multiple sampling modules respectively, and the main control module is used to obtain the current groups of the multiple sampling modules according to the electrical signals collected by the multiple sampling modules.

[0045] In this embodiment, multiple sampling modules in the current acquisition circuit can be set corresponding to multiple signal conversion components in the shunt module. Multi-channel current acquisition can be achieved through the multiple sampling modules, avoiding the use of Hall sensor sampling circuits for current sampling, and correspondingly reducing one power supply module, simplifying the circuit structure.

[0046] In some embodiments, the plurality of sampling modules include at least one of a differential sampling subcircuit and a single-ended sampling subcircuit.

[0047] In this embodiment, multiple sampling modules can select single-ended sampling or differential sampling according to actual conditions, which is more flexible and can better meet diverse sampling scenarios and needs.

[0048] In a fourth aspect, an embodiment of the present application provides a vehicle, comprising the current acquisition system as described in the second aspect or the current acquisition circuit as described in the third aspect.

[0049] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0051] FIG1 is a schematic structural diagram of a diverter module provided in an embodiment of the present application;

[0052] FIG2 is another structural schematic diagram of a diverter module provided in an embodiment of the present application;

[0053] FIG3 is another structural schematic diagram of a diverter module provided in an embodiment of the present application;

[0054] FIG4 is a schematic structural diagram of a current acquisition system provided in an embodiment of the present application;

[0055] FIG5 is a schematic structural diagram of a current acquisition circuit provided in an embodiment of the present application;

[0056] FIG6 is another schematic diagram of the structure of the current acquisition circuit provided in an embodiment of the present application;

[0057] FIG7 is another structural diagram of the current acquisition circuit provided in an embodiment of the present application.

[0058] Figure markings: 100, shunt module; 101, battery; 102, sampling board; 1, conductive connector; 2, signal converter; 21, first signal converter; 22, second signal converter; 3, circuit board; 31, signal transmission component; 4, temperature sensor; 41, first temperature sensor; 42, second temperature sensor; 5, calibration mark; current acquisition circuit, 500; sampling module, 51; main control module, 52; 6, signal transmission component; 61, connecting board; 62, transmission part; 621, pin.

[0059] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0060] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0061] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0062] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0063] In related technologies, the current acquisition module in current detection usually needs to use a shunt module and a Hall sensor for main sampling and redundant sampling. However, the shunt module and the Hall sensor are generally separate structures, which leads to the current acquisition module often having a large structural size, which is not conducive to miniaturization. At the same time, the magnetic core of the Hall sensor requires different sizes according to the charging and discharging current. Especially in the case of large current, the size requirement is large, which is not conducive to miniaturization and there is a risk of magnetic core saturation. In addition, the Hall sensor is easily interfered with during the sampling process, resulting in poor sampling accuracy, affecting the reliability of the verification, and thus affecting the current detection results.

[0064] Based on the above problems, the applicant has improved the structure of the shunt module. The technical solution described in the embodiments of this application is applicable to the shunt module, the current acquisition system including the shunt module, the current acquisition circuit applied to the current acquisition system, the battery management system including the shunt module, and the vehicle using the battery management system.

[0065] Please refer to FIG. 1 , which shows a splitter module 100 provided in some embodiments of the present application, including:

[0066] A plurality of conductive connecting members 1, wherein the plurality of conductive connecting members 1 are arranged in sequence;

[0067] There are multiple signal conversion components 2, different signal conversion components 2 among the multiple signal conversion components 2 are arranged between two different adjacent conductive connecting components, and each signal conversion component 2 is provided with a first sampling point, and the first sampling point of the signal conversion component 2 is used to collect electrical signals.

[0068] In this embodiment, the diverter module 100 may include a plurality of conductive connecting components 1 and a plurality of signal conversion components 2 , the number of the signal conversion components 2 is more than two, and the number of the signal conversion components is at least two.

[0069] The plurality of conductive connectors are arranged in sequence, and any two of the plurality of conductive connectors may be at least partially adjacent to each other, or the conductive connectors may be spaced apart from each other.

[0070] Different signal conversion components among the above-mentioned multiple signal conversion components are arranged between different adjacent two conductive connectors, and a signal conversion component may be arranged between at least some of the adjacent two conductive connectors of the multiple signal conversion components, that is, the number of the above-mentioned conductive connectors may be N, and the number of the above-mentioned signal conversion components may be less than or equal to N-1, where N is an integer greater than 2.

[0071] For example, when the number of the above-mentioned conductive connectors is 4 and the number of signal converters is 2, the 4 conductive connectors can be arranged in sequence to form 3 groups of adjacent two conductive connectors, and the 2 signal converters are respectively arranged between two adjacent conductive connectors among the 3 groups of adjacent two conductive connectors.

[0072] The two adjacent conductive connectors may be understood as two conductive connectors that are adjacent to each other in terms of their placement. For example, the two conductive connectors may be at least partially adjacent to each other, or the two conductive connectors may have a common gap.

[0073] It should be noted that when there are two adjacent conductive connectors among the above-mentioned multiple conductive connectors, the adjacent conductive connectors can be insulated, and the above-mentioned signal conversion component is arranged between the adjacent conductive connectors. It can be that a partial hollow area is also provided between the adjacent conductive connectors, and the signal conversion component is embedded in the hollow area.

[0074] The signal converter is disposed between two adjacent conductive connectors. The conductive connector 1 and the signal converter 2 may be fixedly connected and electrically conductive. Specifically, the conductive connector 1 and the signal converter 2 may be welded together by electron beam welding.

[0075] For example, taking the case where there are two signal converters 2, including a first signal converter 21 and a second signal converter 22, as shown in FIG1 , the diverter module 100 may be composed from left to right of: conductive connector 1-first signal converter 21-conductive connector 1-second signal converter 22-conductive connector 1.

[0076] The signal converter 2 can be any component that can convert the current signal on the battery pack into a voltage signal to facilitate subsequent current sampling. Each signal converter 2 can be provided with a sampling point (i.e., a first sampling point). For example, as shown in FIG1 , the first signal converter 21 can include a sampling positive electrode S1P and a sampling negative electrode S1N, and the second signal converter 22 can also include a sampling positive electrode S2P and a sampling negative electrode S2N.

[0077] The conductive connector 1 can be any metal member with conductive properties. Specifically, the conductive connector 1 can be a copper busbar, and the copper busbar can be a soft copper busbar or a hard copper busbar. More specifically, the conductive connector 1 can be a copper bar (or, also called a "soft copper bar").

[0078] The size of the conductive connector 1 can be obtained by simulation software based on heat dissipation analysis of different currents of the battery pack, and is not specifically limited here.

[0079] In this embodiment, the current splitter module 100 may include a conductive connector 1 and multiple signal converters 2 arranged in a sequentially spaced arrangement. The multiple signal converters 2 enable multi-channel sampling. Thus, the current splitter module 100 alone can perform both primary and redundant sampling, achieving current detection. This reduces the structural size and facilitates miniaturization. Furthermore, the use of Hall effect sensors for sampling is avoided, reducing interference during the sampling process and thereby improving current sampling accuracy.

[0080] In some embodiments, a plurality of conductive connecting elements 1 are spaced apart from each other, and the signal conversion element 2 is located in at least a portion of the space between two adjacent conductive connecting elements 1 .

[0081] In this embodiment, by arranging multiple conductive connectors 1 at intervals from each other and the signal converter 2 being located in at least a portion of the interval between two adjacent conductive connectors 1, mutual interference between signals generated on the conductive connectors 1 can be reduced, thereby improving sampling accuracy.

[0082] The signal converter 2 may be disposed in a partial gap between two adjacent conductive connectors, for example, the signal converter 2 occupies 1 / 4, 1 / 2 or 3 / 4 of the gap between two adjacent conductive connectors; or, the signal converter 2 may fill the gap between two adjacent conductive connectors.

[0083] In some embodiments, a signal conversion component 2 is disposed between each two adjacent conductive connecting components 1 .

[0084] In this embodiment, a signal conversion component 2 is provided between each two adjacent conductive connectors 1, that is, a signal conversion component 2 is provided between each two adjacent conductive connectors 1, so that the structure of the diverter module 100 can be made more compact, the structural size is further reduced, and miniaturization is facilitated.

[0085] The signal conversion component is disposed between each two adjacent conductive connecting components 1 . It can be understood that when the number of the conductive connecting components 1 is N, the number of the signal conversion components 2 is N-1.

[0086] In some embodiments, the diverter module 100 may further include:

[0087] A circuit board 3 is provided on one side of the plurality of conductive connectors 1, and the plurality of signal converters 2 are connected to the circuit board 3;

[0088] The first signal transmission component 31 is disposed on the circuit board 3 , and the first signal transmission component 31 is electrically connected to the first sampling point of each signal conversion component 2 .

[0089] In this embodiment, as shown in FIG2 , the diverter module 100 may further include a circuit board 3 and a first signal transmission member 31. The circuit board 3 is disposed on one side of the signal converter 2 and the conductive connector 1, and may cover the signal converter 2 and a portion of the conductive connector 1. The circuit board, the signal converter 2, and the conductive connector 1 may be soldered together by vacuum reflow soldering.

[0090] For example, the signal conversion component 2 can be soldered on the circuit board 3 through a surface mount technology (SMT) to achieve electrical connection and facilitate subsequent signal transmission.

[0091] The first signal transmission component 31 can be soldered on the circuit board 3 through SMT. The first signal transmission component 31 can be used to transmit the electrical signal generated by the diverter module 100 to the sampling board 102 through the wiring harness to achieve the purpose of current sampling.

[0092] In this embodiment, the circuit board 3 can realize the electrical connection between the various components of the diverter module 100, and the first signal transmission component 31 can be used to transmit the electrical signal collected by the signal conversion component 2, which simplifies the assembly work, reduces wiring, achieves the purpose of saving space, further reduces the structural size, and is conducive to miniaturization.

[0093] The circuit board 3 can be any board structure having a connection line for transmitting electrical signals. Specifically, the circuit board 3 can be a hard circuit board or a soft circuit board.

[0094] In some embodiments, the diverter module 100 may further include:

[0095] Multiple temperature sensors 4 are correspondingly arranged on multiple signal conversion components 2, and multiple temperature sensors 4 are connected to the circuit board 3. Each temperature sensor 4 is provided with a sampling point, and the sampling point of the temperature sensor 4 is used to collect the temperature of the signal conversion component 2.

[0096] In this embodiment, as shown in FIG1 , the diverter module 100 may further include a temperature sensor 4. The number of temperature sensors 4 may be equal to the number of signal converters 2. Thus, one temperature sensor 4 may correspond to one signal converter 2. The temperature sensor 4 may be soldered to the circuit board 3 using a surface mount technology (SMT) to achieve electrical connection and facilitate subsequent signal transmission.

[0097] The above-mentioned temperature sensor 4 is set corresponding to the signal conversion component 2. It can be understood that the temperature sensor 4 is only used to collect the temperature of the corresponding signal conversion component 2, and the corresponding temperature sensor 4 and the signal conversion component 2 can be associated in the setting position. For example, the temperature sensor 4 can be fixedly connected to the corresponding signal conversion component 2; or, the corresponding temperature sensor 4 and the signal conversion component 2 can also have other associations, such as electrical connection or relative and spaced arrangement, etc.

[0098] Taking the example of two temperature sensors 4, including a first temperature sensor 41 and a second temperature sensor 42, as shown in Figure 1, the first temperature sensor 41 can be provided corresponding to the first signal converter 21, and the second temperature sensor 42 can be provided corresponding to the second signal converter 22. Each temperature sensor 4 can be provided with a sampling point. For example, the first temperature sensor 41 can include a positive sampling electrode N1P and a negative sampling electrode N1N, and the second temperature sensor 42 can also include a positive sampling electrode N2P and a negative sampling electrode N2N. The temperature sensor 4 can collect the temperature of the signal converter 2 and transmit the temperature change on the signal converter 2 to the sampling board 102 through the sampling points, so that the sampling board 102 can compensate for the temperature drift of the signal converter 2.

[0099] In this embodiment, the temperature sensor 4 can collect the temperature of the signal converter 2 to subsequently compensate for the temperature drift of the signal converter 2 , thereby improving the sampling accuracy of the signal converter 2 and further improving the current detection accuracy.

[0100] In some embodiments, the diverter module 100 further includes:

[0101] The calibration mark 5 is set on the circuit board 3.

[0102] In this embodiment, the shunt module 100 may further include a calibration mark 5 disposed on the circuit board 3. The calibration mark 5 may include at least one of a barcode and a QR code. The initial resistance value and temperature compensation coefficient of the shunt module 100 may be calibrated for the sampling board 102 by scanning the calibration mark 5.

[0103] In this embodiment, the initial resistance value and the temperature compensation coefficient of the shunt module 100 can be calibrated by the calibration mark 5 to avoid subsequent sampling deviation and improve the current sampling accuracy.

[0104] In some embodiments, as shown in FIG3 , a third sampling point is provided on each conductive connecting member 1 among the plurality of conductive connecting members;

[0105] The diverter module 100 further includes:

[0106] The N second signal transmission elements 6 are correspondingly disposed at the third sampling points of the N conductive connecting elements 1 , and each signal transmission element 6 is electrically connected to its corresponding third sampling point.

[0107] In this embodiment, the N second signal transmission members 6 can be used to transmit the electrical signal collected at the third sampling point of the N conductive connectors 1, making the diverter module 100 more flexible and diverse in the way of transmitting the collected electrical signal.

[0108] In this embodiment, the second signal transmission member 6 can be any conductive structure, and its shape, size, and material can be set according to actual needs. For example, the signal transmission member 6 can be a copper column disposed at the third sampling point.

[0109] The above-mentioned multiple second signal transmission components 6 are correspondingly arranged at the third sampling points of multiple conductive connecting components 1. The number of second signal transmission components 6 can be the same as the number of conductive connecting components 1, and each second signal transmission component 6 is correspondingly arranged at the third sampling point of a conductive connecting component 1.

[0110] The above-mentioned second signal transmission member 6 is arranged corresponding to the third sampling point of the conductive connecting member 1. The second signal transmission member 6 can be electrically connected to the third sampling point of the conductive connecting member 1 to which it corresponds; or the second signal transmission member 6 can be associated with the position of the third sampling point, for example, the second signal transmission member 6 covers at least part of the third sampling point to which it corresponds.

[0111] In some embodiments, the signal transmission member 6 includes:

[0112] a connecting plate 61 , the connecting plate 61 being attached to and connected to at least a portion of the conductive connector 1 , wherein the third sampling point is located within the at least a portion of the region;

[0113] The transmission portion 62 is formed by extending the connecting plate 61 , and the transmission portion 62 is electrically connected to the conductive connecting member 1 through the connecting plate 61 . The transmission portion 62 is used to transmit the electrical signal collected by the conductive connecting member 1 .

[0114] In this embodiment, the transmission part 62 is electrically connected through a connecting plate 61 fixedly connected to the conductive connector 1, and the connecting plate 61 is attached to at least a partial area of ​​the conductive connector 1 including the third sampling point, which can increase the contact area between the signal transmission part 6 and the conductive connector 1, thereby making the connection between the signal transmission part 6 and its corresponding conductive connector 1 more secure, thereby improving the stability of the diverter module 100.

[0115] In this embodiment, the connecting plate 61 may be a plate-shaped structure having conductive properties. The connecting plate 61 covers at least a portion of the conductive connector 1 including the third sampling point. The size, shape, and material of the connecting plate 61 may be set according to actual needs. For example, the connecting plate 61 may be a 1-2 mm copper plate.

[0116] The connection between the connecting plate 61 and the conductive connector 1 may be a fixed connection between the connecting plate 61 and the conductive connector 1 , for example, the connecting plate 61 is welded or riveted to the conductive connector 1 .

[0117] The transmission unit 62 may be a component for connecting to an external signal receiving device and transmitting the electrical signal at the third sampling point to the external signal receiving device. For example, the transmission unit 62 may be a socket fixedly connected to the connecting plate 61, and the socket may be provided with a jack.

[0118] The transmission portion 62 is formed by extending the connecting plate 61 , and it can be understood that the transmission portion 62 and the connecting plate 61 are an integral structure; or, the transmission portion 62 and the connecting plate 61 can be two relatively independent structures and are interconnected.

[0119] In some embodiments, the transmitting portion 62 includes at least one pin 621 .

[0120] In this embodiment, by providing at least one pin 621 on the transmission portion 62, connection with an external device can be achieved through the pin 621, which facilitates operation during signal transmission.

[0121] In some embodiments, different signal conversion components 2 have different structural features.

[0122] In this embodiment, different signal converters 2 are provided with different structural features, thereby facilitating identification of multiple signal converters 2 , so that during sampling, the sampled object can be determined based on the structural features of each signal converter, thereby improving sampling efficiency.

[0123] The different signal conversion components 2 mentioned above have different structural features, which may be that the different signal conversion components 2 have at least one different mark, color or size.

[0124] Specifically, the multiple signal conversion components 2 have different resistance values ​​and are made of the same material. Since the multiple signal conversion components 2 have different resistance values ​​when made of the same material, the sizes of the different signal conversion components 2 will inevitably be different.

[0125] In this embodiment, the number of the signal conversion components 2 may be two, including a first signal conversion component 21 and a second signal conversion component 22 .

[0126] Based on practical experience, when the battery pack is charging or discharging at maximum power, the temperature of the signal converter 2 (with its higher resistance) must be maintained below 140°C. Otherwise, the reliability of the circuit board 3 and its components will be affected. When the power is very high, in addition to active cooling measures such as air cooling or water cooling, the resistance of the first and second signal converters 21 and 22 can be limited because higher resistance generates more heat.

[0127] The resistance value of the first signal conversion element 21 may be 20-30 uΩ, preferably 25 uΩ. The resistance value of the second signal conversion element 22 may be 10-20 uΩ, preferably 15 uΩ.

[0128] In this embodiment, two-way current collection can be achieved through the first signal conversion component 21 and the second signal conversion component 22, which is conducive to miniaturization. At the same time, the resistance value thereof is limited to ensure the accuracy of current sampling and functional reliability.

[0129] In some embodiments, the material of the plurality of signal conversion components 2 is any one of manganese-copper alloy, iron-chromium-aluminum alloy and nickel-chromium alloy.

[0130] In this embodiment, the material of the signal conversion component 2 is any one of manganese-copper alloy, iron-chromium-aluminum alloy and nickel-chromium alloy. For example, manganese-copper alloy can be used, which has the characteristics of high sensitivity, fast response, good linearity, and small resistance temperature coefficient, and can effectively ensure the current sampling accuracy of the shunt module 100.

[0131] In this embodiment, the material of the signal converter 2 can be selected from any one of manganese-copper alloy, iron-chromium-aluminum alloy and nickel-chromium alloy according to actual needs. The diverter module 100 is very flexible to meet more diverse needs.

[0132] Please refer to FIG4 , which is a schematic diagram of the structure of a current acquisition system provided in an embodiment of the present application. The current acquisition system includes:

[0133] Battery 101 and sampling plate 102;

[0134] and the above-mentioned diverter module 100;

[0135] The battery 101 and the sampling plate 102 are respectively connected to the diverter module 100 .

[0136] In this embodiment, as shown in FIG4 , the current acquisition system may include a battery 101, a sampling board 102, and a shunt module 100. The battery 101 and the sampling board 102 may be connected to the shunt module 100, respectively. The shunt module 100 may perform multi-channel sampling of the current signal of the battery 101 and transmit the sampling signal to the sampling board 102 for current detection, thereby analyzing the status of the battery 101.

[0137] In this embodiment, the current acquisition system can include the aforementioned shunt module 100. Thus, the shunt module 100 alone can perform both primary and redundant sampling, achieving current detection. This reduces the structural size and facilitates miniaturization. Furthermore, the use of Hall effect sensors for sampling is avoided, reducing interference during the sampling process and thereby improving current sampling accuracy.

[0138] 5 to 7 , the present embodiment may further provide a current acquisition circuit 500 , including:

[0139] Multiple sampling modules 51, the multiple sampling modules 51 are correspondingly arranged with the multiple signal conversion components 2 in the above-mentioned splitter module 100;

[0140] The main control module 52 is used to connect to the multiple sampling modules 51 respectively. The main control module 52 is used to obtain the current groups of the multiple sampling modules 51 according to the electrical signals collected by the multiple sampling modules 51.

[0141] In this embodiment, the current acquisition circuit may include multiple sampling modules 51, wherein the multiple sampling modules 51 may correspond one-to-one to the multiple signal conversion components 2 in the diverter module 100. For example, if the diverter module 100 includes a first signal conversion component 21 and a second signal conversion component 22, then there are also two corresponding sampling modules 51.

[0142] The main control module may include a central processing unit (CPU), which can be connected to the above-mentioned multiple sampling modules 51 respectively, for receiving the electrical signals collected by the multiple sampling modules 51, and analyzing and processing the electrical signals collected by the multiple sampling modules 51 to obtain the current groups of the multiple sampling modules 51.

[0143] Taking the diverter module 100 as an example, in which the first signal converter 21 and the second signal converter 22 are included, the corresponding multiple acquisition modules include a first sampling module ADC1 and a second sampling module ADC2, and the first sampling module ADC1 is set corresponding to the first signal converter 21, and the second sampling module ADC2 is set corresponding to the second signal converter 22, the current group can include the sampling current corresponding to the first sampling module ADC1 and the sampling current corresponding to the second sampling module ADC2.

[0144] Specifically, when the resistance of the first signal conversion component 21 is greater than the resistance of the second signal conversion component 21, the control module may be used to calculate the state description of the battery pack and perform overcurrent diagnosis based on the sampling current of the first sampling module ADC1. The state description (State Of X, SOX) of the battery pack may include the state of charge (SOC) and health (SOH) of the power battery and the power state (SOP) of the power battery; and, perform overcurrent diagnosis based on the sampling current of the second sampling module ADC2 and verify the sampling value of the first sampling module ADC1.

[0145] In this embodiment, multiple sampling modules 51 in the current acquisition circuit can be set corresponding to the multiple signal conversion components 2 in the diverter module 100. Multi-channel current acquisition can be achieved through the multiple sampling modules 51, avoiding the use of Hall sensor sampling circuits for current sampling, and correspondingly reducing one power supply module, simplifying the circuit structure.

[0146] The above-mentioned multiple sampling modules 51 can be arranged corresponding to the multiple signal conversion components 2 in the diverter module 100. The number of sampling modules 51 can be the same as the number of signal conversion components 2, and each sampling module 51 is electrically connected to its corresponding signal conversion component 2.

[0147] In some embodiments, the plurality of sampling modules 51 include at least one of a differential sampling subcircuit and a single-ended sampling subcircuit.

[0148] In this embodiment, it is understood that single-ended sampling generally uses one signal line for sampling, while differential sampling often requires two signal lines for sampling. Compared with single-ended sampling, differential sampling has the following advantages:

[0149] 1. Strong anti-interference ability. Interference noise is generally loaded onto two signal lines at the same time with equal value, and the difference is 0, that is, the noise has no effect on the signal.

[0150] 2. It can effectively suppress electromagnetic interference. Since the two signal lines are very close and the signal amplitudes are equal, the amplitudes of the coupled electromagnetic fields between the two signal lines and the ground line are also equal. At the same time, the signal polarities are opposite, and their electromagnetic fields will cancel each other out, thus reducing the electromagnetic interference to the outside world.

[0151] Compared with single-ended sampling, the disadvantages of differential sampling are:

[0152] Differential sampling requires two signal lines of equal length and width, running close together and on the same plane, while single-ended sampling requires only one signal line, with the ground line running along the ground plane. Therefore, differential sampling occupies more space than single-ended sampling. If PCB space is very limited, single-ended sampling may be an option.

[0153] Based on this, this embodiment can choose to adopt differential sampling or single-ended sampling according to actual conditions. Specifically, each sampling module 51 in the multiple sampling modules 51 can be a differential sampling sub-circuit; alternatively, each sampling module 51 in the multiple sampling modules 51 can be a single-ended sampling sub-circuit; alternatively, some sampling modules 51 in the multiple sampling modules 51 can be differential sampling sub-circuits, while other sampling modules 51 can be single-ended sampling sub-circuits.

[0154] Taking the example of a current splitter module 100 including a first signal converter 21 and a second signal converter 22, and correspondingly N-1 acquisition modules including a first sampling module ADC1 and a second sampling module ADC2, as shown in FIG5 , the first sampling module ADC1 and the second sampling module ADC2 can both include differential sampling subcircuits. Alternatively, as shown in FIG6 , the first sampling module ADC1 can include a differential sampling subcircuit, and the second sampling module ADC2 can include a single-ended sampling subcircuit. Alternatively, as shown in FIG7 , the first sampling module ADC1 and the second sampling module ADC2 can both include single-ended sampling subcircuits.

[0155] In this embodiment, the multiple sampling modules 51 can select single-ended sampling or differential sampling according to actual conditions, which is more flexible and can better meet diverse sampling scenarios and needs.

[0156] An embodiment of the present application provides a vehicle, comprising the above-mentioned current acquisition system or the above-mentioned current acquisition circuit.

[0157] The present application also provides a vehicle that can include the above-mentioned current acquisition system or circuit. Thus, because the battery management system's current detection is more accurate and reliable, the reliability of the vehicle's charging and discharging process can be improved, and the risk of battery 101 failure can be reduced.

[0158] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A diverter module, comprising: A plurality of conductive connecting members, wherein the plurality of conductive connecting members are arranged in sequence; A plurality of signal conversion components, wherein different signal conversion components among the plurality of signal conversion components are arranged between two different adjacent conductive connecting components, and each of the signal conversion components is provided with a first sampling point, and the sampling point is used to collect electrical signals.

2. The diverter module according to claim 1, wherein: The plurality of conductive connecting members are arranged at intervals from each other, and the signal conversion member is located in at least a portion of the interval between two adjacent conductive connecting members.

3. The diverter module according to claim 1 or 2, wherein: The signal conversion component is arranged between each two adjacent conductive connecting components.

4. The diverter module according to any one of claims 1 to 3, further comprising: A circuit board, wherein the circuit board is disposed on one side of the plurality of conductive connecting members, and the plurality of signal conversion members are connected to the circuit board; The first signal transmission component is arranged on the circuit board, and the first signal transmission component is electrically connected to the first sampling point of each signal conversion component.

5. The diverter module according to claim 4, further comprising: A plurality of temperature sensors are provided at the plurality of signal conversion components correspondingly, and the plurality of temperature sensors are connected to the circuit board, and each of the temperature sensors is provided with a second sampling point, and the second sampling point is used to collect the temperature of the signal conversion component.

6. The diverter module according to claim 4, further comprising: A calibration mark is arranged on the circuit board.

7. The diverter module according to any one of claims 1 to 6, wherein: A third sampling point is arranged on each of the plurality of conductive connecting members; The diverter module also includes: A plurality of second signal transmission components are disposed correspondingly at the third sampling points of the plurality of conductive connecting components, and each of the second signal transmission components is electrically connected to the corresponding third sampling point.

8. The diverter module according to claim 7, wherein: The second signal transmission member comprises: a connecting plate, the connecting plate being attached to at least a partial area of ​​the conductive connecting member and connected to the conductive connecting member, the third sampling point being located in the at least partial area; The transmission part is formed by extending the connecting plate, and the transmission part is electrically connected to the conductive connecting member through the connecting plate, and the transmission part is used to transmit the electrical signal collected by the conductive connecting member.

9. The diverter module according to claim 8, wherein: The transmission portion includes at least one pin.

10. The diverter module according to any one of claims 1 to 9, wherein: Different signal conversion components have different structural features.

11. A current acquisition system, comprising: Batteries and sampling plates; and a diverter module according to any one of claims 1 to 10; Wherein, the battery and the sampling plate are respectively connected to the diverter module.

12. A current collection circuit, comprising: A plurality of sampling modules, wherein the plurality of sampling modules are arranged corresponding to the plurality of signal conversion components in the diverter module according to any one of claims 1 to 10; A main control module, wherein the main control module is used to be connected to the plurality of sampling modules respectively, and the main control module is used to obtain the current groups of the plurality of sampling modules according to the electrical signals collected by the plurality of sampling modules.

13. The current acquisition circuit according to claim 12, wherein: The plurality of sampling modules each include at least one of a differential sampling subcircuit and a single-ended sampling subcircuit.

14. A vehicle, comprising the current acquisition system according to claim 11 or the current acquisition circuit according to claim 12.

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