Integrated busbar, battery pack and detection system

Abstract

The utility model provides an integrated busbar, a battery pack and a detection system, the integrated busbar comprises an acquisition circuit assembly and a battery slave control module, the acquisition circuit assembly comprises a plurality of circuit boards, the battery slave control module is installed on the circuit boards, and the plurality of circuit boards are connected in series along a first direction. The acquisition circuit and the slave control module are integrated together, so that the connection structure is simplified, the use of wire harnesses is reduced, the data transmission efficiency and precision are improved, the function integration level is enhanced, and the system has the advantages that the connection structure is simplified, the data transmission efficiency and precision are improved, and the function integration level is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of battery energy storage technology, and in particular to an integrated busbar, battery pack and detection system. Background Technology

[0002] Battery energy storage systems (BESS) are the most widely used energy storage systems, boasting advantages such as low cost, mature technology, high charge / discharge ratio, and good modularity. BESS can be used for load stabilization in substations, stabilization of renewable energy generation systems, and system backup, and shows promising application prospects in active distribution networks.

[0003] However, in existing energy storage battery systems, the battery pack consists of a battery slave control module, battery cells, an integrated busbar, and a data acquisition harness, making the connections overly complex. In traditional battery pack designs, individual battery cells are connected in series to form modules, and the integrated busbar is soldered onto the modules. The cell modules are then connected to the slave control board of the battery slave control module via data acquisition adapter cables. This design has the following problems: complex connections, latency in data transmission via the harness, and data errors.

[0004] Furthermore, existing integrated busbar assemblies typically include output-stage aluminum busbars, series aluminum busbars, integrated busbar brackets, blister packs, and integrated busbar protective covers. While the integrated busbar brackets contain data acquisition circuit boards, their functionality is limited and cannot meet higher integration requirements. Additionally, the connecting copper busbars require bending, increasing manufacturing costs.

[0005] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0006] The purpose of this invention is to provide an integrated busbar, battery pack, and detection system, which has the advantages of simplifying the connection structure, improving data transmission efficiency and accuracy, and enhancing functional integration.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An integrated busbar according to an embodiment of the present invention includes: a data acquisition circuit assembly and a battery slave control module. The data acquisition circuit assembly includes a circuit board and a first connector. The battery slave control module is mounted on the circuit board, and multiple circuit boards are connected in series along a first direction through the first connector.

[0009] In addition, the integrated busbar according to the above embodiments of the present invention may also have the following additional technical features:

[0010] In some embodiments of this utility model, the battery slave control module includes an analog front-end chip, which is mounted on the circuit board.

[0011] In some embodiments of this utility model, the battery slave control module includes a temperature detection element, which is mounted on the circuit board.

[0012] In some embodiments of this utility model, a plurality of second connectors are further included, at least two of the second connectors are connected to one of the circuit boards, and the second connectors are mounted on both sides of the circuit board perpendicular to the series direction.

[0013] In some embodiments of this utility model, the circuit board is provided with connecting nickel sheets, which are installed on both sides of the circuit board perpendicular to the series direction, and the second connector is soldered to the connecting nickel sheets.

[0014] In some embodiments of this utility model, the acquisition circuit assembly further includes a base plate and a protective cover. Multiple circuit boards connected in series are mounted on the base plate via the second connector. The protective cover is mounted on the base plate and is mounted on the side away from the circuit boards.

[0015] In some embodiments of this utility model, a clearance hole is provided on one side of the protective cover, and the third connector of the battery passes through the clearance hole to connect to the second connector.

[0016] In some embodiments of this utility model, the circuit board is configured as a flexible circuit board, and the first connector is configured as a flexible circuit board.

[0017] This utility model also provides a battery pack, which includes the aforementioned integrated busbar.

[0018] This utility model also provides a detection system, which includes a host computer, a communication line and the aforementioned battery pack, wherein the host computer is connected to the battery pack via the communication line.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] The detection system according to this utility model integrates the acquisition circuit and the slave control module, which simplifies the connection structure, reduces the use of wiring harnesses, thereby improving data transmission efficiency and accuracy, and enhancing functional integration. It has the advantages of simplifying the connection structure, improving data transmission efficiency and accuracy, and enhancing functional integration.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the circuit board structure according to an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the series circuit board structure according to an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the integrated busbar according to an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the protective cover structure according to an embodiment of the present utility model;

[0026] Figure 5 This is a voltage sampling principle diagram of the detection system according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the temperature sampling principle of the detection system according to an embodiment of the present invention.

[0028] Figure Labels

[0029] 100. Integrated busbar;

[0030] 1. Acquisition circuit assembly; 11. Circuit board; 12. First connector; 13. Nickel sheet;

[0031] 2. Battery slave control module; 21. Analog front-end chip;

[0032] 3. Second connector; 4. Base plate; 5. Protective cover; 51. Clearance hole. Detailed Implementation

[0033] The present invention, comprising an integrated busbar, battery pack, and detection system, will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. It should be understood that those skilled in the art can modify the invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the scope of the invention.

[0034] In the description of this specification, terms such as "one embodiment" or "some embodiments" mean that one or more embodiments of this specification include a particular feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0035] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] With the increasing application of battery energy storage systems in power systems, effectively acquiring voltage and temperature signals from each battery module within the battery pack has become a pressing technical problem. Traditional battery pack designs involve overly complex connections between the battery control module, cells, integrated busbars, and acquisition harnesses. Harness transmission introduces delays and data errors, affecting the accuracy and real-time performance of data acquisition.

[0037] The integrated busbar 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0038] According to the integrated busbar 100 of the present utility model embodiment, such as Figures 1-3 As shown, the integrated busbar includes a data acquisition circuit assembly 1 and a battery slave control module 2. The data acquisition circuit assembly 1 includes a circuit board 11 and a first connector 12. Multiple circuit boards 11 are connected to the first connector 12 along a first direction (e.g., ...). Figure 2 (shown in the X direction) are connected in series. The battery slave control module 2 is mounted on these circuit boards 11. Through this integrated design, the voltage and temperature signals of each battery module in the battery pack can be effectively acquired, reducing the delay and data error problems caused by wiring harness transmission in traditional designs, thereby improving the accuracy and real-time performance of data acquisition.

[0039] In existing technologies, traditional battery packs consist of a battery slave control module, battery cells, an integrated busbar, and a data acquisition harness. Individual battery cells are connected in series to form modules, and the integrated busbar is soldered onto the modules. Data acquisition adapter cables connect the battery cell modules to the slave control board of the battery slave control module. The data acquisition adapter harness transmits data such as voltage and temperature from the individual battery cells to the slave control board of the battery slave control module. This design is overly complex, and data transmission via the harness introduces delays and errors.

[0040] To overcome these problems, such as Figure 1 As shown, this utility model integrates the battery slave control module 2, the acquisition harness, and the integrated busbar 100 into one unit and welds them to the top of the battery pack. This reduces the installation space of the acquisition harness and the battery slave control module 2, and allows the voltage and temperature of each cell to be acquired directly through the integrated busbar 100, which greatly saves space and cost within the battery pack and reduces assembly difficulty.

[0041] In the implementation of this utility model, the acquisition circuit assembly 1 includes multiple circuit boards 11 connected in series along a first direction. The battery slave control module 2 is mounted on these circuit boards 11. This design enables the effective acquisition of voltage and temperature signals from each battery module within the battery pack. Specifically, the analog front-end chip 21 on the acquisition circuit board 11 performs voltage monitoring, temperature detection, impedance detection, communication, and equalization. Temperature detection of the positive and negative copper busbars is performed using a temperature sensor (not shown) on the acquisition circuit board 11, and the data is then directly transmitted to the host computer via a communication harness.

[0042] In existing battery packs, the connecting copper busbars require bending, increasing processing costs. To address this issue, this invention provides a protective cover 5 with a clearance feature on its side. This clearance allows the connecting copper busbars to easily extend into the protective cover and connect electrically with the output stage aluminum busbars without bending, thus reducing processing costs.

[0043] According to the integrated busbar 100 of this utility model embodiment, by integrating the battery slave control module 2 and the acquisition circuit assembly 1 on the integrated busbar 100, the installation space of the acquisition wiring harness and the battery slave control module 2 is reduced. The voltage and temperature of each cell are directly acquired through the acquisition circuit assembly 1, which reduces the error in the transmission process, improves the accuracy and real-time performance of data acquisition, greatly saves space and production costs in the battery pack, and reduces assembly difficulty.

[0044] In some embodiments of this utility model, such as Figure 1 As shown, the battery slave control module 2 includes an analog front-end chip 21, which is mounted on the circuit board 11. The analog front-end chip 21 is used to acquire voltage and temperature signals. By integrating it onto the circuit board 11, circuit design can be simplified, external connection harnesses can be reduced, thereby improving the accuracy and real-time performance of signal acquisition.

[0045] The analog front-end chip 21 can be implemented in various ways. For example, a high-precision integrated circuit chip can be selected and installed on the circuit board 11 through circuit design to acquire voltage and temperature signals. Furthermore, the accuracy of signal acquisition can be improved by optimizing the circuit layout to reduce electromagnetic interference. A multi-channel design can also be used to achieve simultaneous monitoring of multiple battery modules.

[0046] By adding the analog front-end chip 21 to the acquisition circuit assembly 1 and mounting it on the circuit board 11, the acquisition circuit assembly 1 can acquire voltage and temperature signals more efficiently. Compared with the prior art, this technical solution simplifies circuit design, reduces external connection harnesses, and improves the accuracy and real-time performance of signal acquisition, thereby enhancing the overall performance and reliability of the system.

[0047] In some embodiments of this utility model, the battery slave control module 2 includes a temperature detection element (not shown in the figure), which is mounted on the circuit board 11. By mounting the temperature detection element on the circuit board 11, the temperature of the battery module is monitored, thereby solving the problem of battery module temperature monitoring. Integrating the temperature detection element onto the circuit board 11 simplifies the temperature monitoring structure, reduces installation complexity, and improves the accuracy and response speed of temperature monitoring.

[0048] The temperature sensing element can be of various types, such as a thermocouple, a thermistor, or an integrated temperature sensing element chip. A thermocouple measures temperature by the electromotive force generated at the contact point between two different metals; a thermistor's resistance changes with temperature; and an integrated temperature sensing element chip can directly output an electrical signal proportional to temperature. The temperature sensing element is fixed to the circuit board 11 by soldering or surface mounting and is connected to the acquisition circuit assembly 1 via a circuit to collect the battery module's temperature data in real time. The collected temperature data can be transmitted to a host computer via a communication line for monitoring and processing.

[0049] This invention achieves real-time monitoring of the battery module temperature by installing the temperature detection component on the circuit board 11. This simplifies the temperature monitoring structure, reduces installation complexity, and improves the accuracy and response speed of temperature monitoring. Compared with existing technologies, this invention effectively solves the problem of battery module temperature monitoring and has significant advantages.

[0050] In some embodiments of this utility model, a plurality of second connectors 3 are also included, at least two of the second connectors 3 are connected to one of the circuit boards 11, and the second connectors 3 are installed on both sides of the circuit board 11 perpendicular to the series direction, so that the circuit board 11 has better mechanical stability and electrical connection stability in the series direction.

[0051] Multiple second connectors 3 are fixed to the series-connected circuit boards 11 by welding. The second connectors 3 can be L-shaped, T-shaped, or other suitable shapes to ensure the stability and strength of the series-connected circuit boards 11 in the first direction. The second connectors 3 can be made of materials that are heat-resistant, corrosion-resistant, and have good electrical conductivity to meet the needs of use in different environments. For example, the second connectors 3 can be made of aluminum plate to improve their conductivity and durability.

[0052] Specifically, each circuit board 11 has a second connector 3 connected to both sides. Multiple circuit boards 11 connected in series are linked by multiple second connectors 3, and one second connector 3 connects two adjacent circuit boards 11. The second connectors 3 are installed perpendicular to the series direction on both sides of the circuit board 11, solving the stability problem of multiple circuit boards 11 connected in series. Compared with the prior art, the design of this utility model improves the mechanical stability and electrical connection stability of the circuit boards 11 in the series direction, reduces the possibility of loosening or poor contact during use, and improves the overall system reliability and service life.

[0053] In some embodiments of this utility model, such as Figure 1 As shown, the circuit board 11 is provided with connecting nickel plates 13, which are mounted perpendicular to the series direction on both sides of the circuit board 11. The second connector 3 is soldered to the connecting nickel plates 13. The arrangement of the connecting nickel plates 13 enables the second connector 3 to be firmly soldered to the circuit board 11, ensuring a more reliable and stable connection between the second connector 3 and the circuit board 11, reducing the difficulty and error in the soldering process, and improving the quality and efficiency of the connection of the circuit board 11.

[0054] The connecting nickel sheet 13 can be installed in various ways. For example, it can be fixed to the circuit board 11 by laser welding or other common welding techniques. The material of the connecting nickel sheet 13 can be nickel, which has good electrical conductivity, to ensure a stable and reliable electrical connection between the circuit boards 11. In addition, the thickness and shape of the connecting nickel sheet 13 can be adjusted according to specific application requirements to meet the connection requirements of different circuit boards 11.

[0055] In some embodiments of this utility model, such as Figure 3 , Figure 4As shown, the acquisition circuit assembly 1 also includes a base plate 4 and a protective cover 5. Multiple circuit boards 11 connected in series are mounted on the base plate 4 via the second connector 3. The protective cover 5 is mounted on the base plate 4, and is positioned on the side away from the circuit boards 11. The cooperation of the base plate 4 and the protective cover 5 solves the problem of stable installation and protection of the circuit boards 11. The base plate 4 provides support and a fixed position for the circuit boards 11, while the protective cover 5 protects the circuit boards 11 from external environmental damage.

[0056] Specifically, the base plate 4 can be made of high-strength engineering plastic to ensure sufficient strength and stability. The second connector 3 can be connected to the base plate 4 by screws, bolts, or other suitable fasteners, thereby firmly fixing the circuit board 11 to the base plate 4. The protective cover 5 can be made of transparent or semi-transparent material to facilitate observation of the circuit board 11, or it can be made of opaque material to provide better protection. The design of the protective cover 5 should ensure that it can effectively prevent the influence of external factors such as dust and moisture on the circuit board 11.

[0057] For example, in a preferred embodiment, the base plate 4 can be made of engineering plastic material, which has good heat dissipation performance and mechanical strength. The second connector 3 is made of aluminum plate and is snapped onto the base plate 4. The protective cover 5 can be made of polycarbonate material, which has good impact resistance and transparency, so as to facilitate observation of the working status of the circuit board 11.

[0058] Through the above design, this utility model effectively solves the problems of installation and protection of the circuit board 11 in the prior art. Compared with the prior art, the design of this utility model is simpler and more efficient, ensuring the stable installation of the circuit board 11 and providing good protection, reducing the risk of the circuit board 11 being affected by the external environment, thereby improving the reliability and service life of the circuit board 11.

[0059] In some embodiments of this utility model, such as Figure 4 As shown, a clearance hole 51 is provided on one side of the protective cover 5, and the third connector of the battery passes through the clearance hole 51 to connect to the second connector 3.

[0060] The protective cover 5 has a clearance hole 51 on one side, allowing the third connector of the battery to pass directly through the clearance hole 51 and connect to the second connector 3, thus avoiding the need to bend the third connector. This design simplifies the connection process, reduces processing costs, and improves assembly efficiency.

[0061] It should be noted that the third connector is a copper busbar structure of the battery, while the second connector 3 is an aluminum busbar structure.

[0062] The clearance hole 51 can be designed in various forms, such as circular, elliptical, or other shapes, to accommodate different connector shapes and sizes. The position and size of the clearance hole 51 need to be designed and adjusted according to the specific circumstances of the battery and the third connector in the actual application to ensure that the third connector can smoothly pass through the clearance hole 51 and reliably connect with the second connector 3. Furthermore, the edges of the clearance hole 51 can be appropriately treated, such as chamfered or rounded, to reduce wear and stress concentration on the connector.

[0063] This invention, by providing a clearance hole 51 on one side of the protective cover 5, allows the third connector of the battery to directly pass through the clearance hole 51 and connect to the second connector 3, avoiding the need for bending the connecting copper busbar. This simplifies the connection process, reduces processing costs, and improves assembly efficiency. Furthermore, by rationally designing the shape, position, and size of the clearance hole 51, the reliability and stability of the connection can be ensured. Compared with existing technologies, this invention has significant advantages in solving the problem of needing to bend the connecting copper busbar when connecting it to the protective cover 5.

[0064] In some embodiments of this utility model, such as Figure 2 , Figure 3 As shown, the circuit board 11 is configured as a flexible circuit board 11, and the first connector 12 is configured as a flexible circuit board 11. By using the first connector 12 as a flexible circuit board 11 to connect multiple circuit boards 11, the connection is made simpler, reducing the complexity of connecting traditional rigid circuit boards 11. Flexible circuit boards can be bent and folded to a certain extent, providing greater design flexibility, thereby simplifying the layout and installation process of the circuit boards 11 and reducing the difficulty of processing and assembly.

[0065] Flexible circuit boards can use polyimide or polyester film as the substrate, offering good flexibility and heat resistance. Multiple circuit boards can be connected to the flexible circuit board via soldering, crimping, or other suitable methods. The design of the flexible circuit board can be optimized according to specific application requirements; for example, adding multilayer structures to improve electrical performance or adding reinforcing ribs in critical areas to enhance mechanical strength.

[0066] By employing a flexible circuit board, this invention offers significant advantages in addressing the complexity of the connections on the circuit board 11. Compared to traditional rigid circuit boards, the flexible circuit board reduces the number of connection points, lowering the risk of failure. Simultaneously, the bendability of the flexible circuit board allows for a more flexible layout of the circuit board 11, adapting to different shapes and spatial requirements, further simplifying the installation and maintenance process. Therefore, this invention reduces processing and assembly difficulty while also improving the overall system's reliability and stability.

[0067] In some embodiments of this utility model, a battery pack includes a battery module and the integrated busbar 100, wherein the integrated busbar 100 is mounted on the battery module.

[0068] The battery pack includes the battery module and the integrated busbar 100. The integrated busbar 100 is mounted on the battery module, simplifying the assembly process and reducing space occupation and cost. By directly mounting the integrated busbar 100 on the battery module, it can more effectively collect the voltage and temperature data of the battery module, improving the accuracy of data acquisition.

[0069] The integrated busbar 100, by being mounted on the battery module, reduces the complexity of connections in traditional solutions. Specifically, the integrated busbar 100 includes the acquisition circuit assembly 1 and the battery slave control module 2. The acquisition circuit assembly 1 includes multiple circuit boards 11, and the battery slave control module 2 is mounted on the circuit boards 11. The multiple circuit boards 11 are connected in series along a first direction. The acquisition circuit assembly 1 may also include the analog front-end chip 21 and the temperature detection device, which is mounted on the circuit board 11. Multiple second connectors 3 are connected to the circuit boards 11, and the second connectors 3 are mounted on both sides of the circuit board 11 perpendicular to the series direction. The circuit board 11 is provided with connecting nickel plates 13, which are mounted on both sides of the circuit board 11 perpendicular to the series direction. The second connectors 3 are soldered to the connecting nickel plates 13. The acquisition circuit assembly 1 also includes a base plate 4 and a protective cover 5. The multiple circuit boards 11 connected in series are mounted on the base plate 4 through the second connectors 3, and the protective cover 5 is mounted on the base plate 4, on the side away from the circuit boards 11. The protective cover 5 has a clearance hole 51 on one side, and the third connector of the battery passes through the clearance hole 51 to connect to the second connector 3. The circuit board 11 is a flexible circuit board 11, and multiple circuit boards 11 are connected in series through the flexible circuit board 11.

[0070] Through the above design, the battery pack of this utility model has significant advantages in simplifying the assembly process, reducing space occupation, and lowering costs. The integrated busbar 100 is directly installed on the battery module, avoiding the complex connecting harnesses and the installation of the battery slave control module 2 in traditional solutions, thus reducing assembly difficulty. Simultaneously, the voltage and temperature data of the battery module are directly collected through the integrated busbar 100, improving the accuracy of data acquisition and reducing errors during data transmission. Therefore, the battery pack of this utility model can more efficiently and accurately collect and manage battery data in practical applications.

[0071] In some embodiments of this utility model, a detection system includes a host computer, a communication line, and the battery pack, wherein the host computer is communicatively connected to the battery pack through the communication line.

[0072] The detection system includes a host computer, a communication line, and a battery pack. The host computer communicates with the battery pack via the communication line. This technical solution achieves communication between the battery pack and the host computer, enabling monitoring and control of the battery pack's status. This solution, through a simple communication line connection, reduces complex wiring operations and improves system reliability and data transmission accuracy.

[0073] The communication connection between the battery pack and the host computer can be achieved in various ways. For example, standard serial communication interfaces such as RS485 or CAN bus can be used to ensure the stability and real-time performance of data transmission. Furthermore, a communication module can be integrated within the battery pack to support wireless communication methods such as Wi-Fi or Bluetooth, reducing the complexity of the physical connection. In addition, the communication line can use shielded cables to prevent electromagnetic interference and improve the accuracy of data transmission. As a preferred embodiment, a data encryption module can be added between the host computer and the battery pack to ensure the security of transmitted data.

[0074] The detection system of this invention achieves real-time monitoring and control of the battery pack's status through a communication connection between the host computer and the battery pack. Compared with existing technologies, it has the following advantages: First, it simplifies the connection between the battery pack and the host computer, reducing wiring complexity; second, it improves system reliability and data transmission accuracy; and finally, by supporting multiple communication methods, it enhances the system's flexibility and adaptability. These improvements make the detection system more efficient and reliable in practical applications.

[0075] Specifically, this invention employs a passive equalization plus impedance equalization scheme for voltage sampling, such as... Figure 5As shown, the first end of resistor R45 is connected to the first ends of resistors R44, R40, and R41. The first end is the positive terminal and is laser-welded to the second connector 3 using the nickel sheet 13. The second end of the parallel resistor circuit is connected to the first end of resistor R43. The first end of resistor R43 is connected to the drain of the MOSFET, and the second end of resistor R43 is connected to the VDR interface of the AFE chip. The source of MOSFET Q40 is connected to the first end of resistor R42. This interface is connected in parallel to the second connector 3 via laser welding using the nickel sheet 13. The second end of resistor R42 is connected to the VSW interface of the AFE chip, and the gate of MOSFET Q40 is connected to the VSW of the AFE chip. The duty cycle of this circuit is controlled by the parallel MOSFET Q40 to achieve passive balancing. In the circuit, D40, D41, D42, D43, and D44 are TVS diodes. The first terminal of D40 is connected to the DIOBOTn interface of the AFE chip, and also to the first terminal of capacitor C52. The second terminal of TVS diode D40 is grounded, and the second terminal of capacitor C52 is connected to pin 1 of connector J42. The first terminal of D41 is connected to the DIOBOTp interface of the AFE chip, and also to the first terminal of capacitor C51. The second terminal of TVS diode D41 is grounded, and the second terminal of capacitor C52 is connected to pin 1 of connector J42. Pin 2 of D42 is connected; the first end of D42 is connected to the VDR interface of the AFE chip, and the first end is connected to the second end of resistor R43. The second end of TVS diode D42 is grounded; the first end of D43 is connected to DIOTOPn of the AFE chip, and the first end is connected to pin 6 of transformer T40. The second end of TVS diode D43 is grounded; the first end of D44 is connected to DIOTOPp of the AFE chip, and the first end is connected to pin 4 of transformer T40. The second end of TVS diode D44 is grounded. Pin 1 of transformer T40 is connected to pin 2 of connector J43, and pin 3 of transformer T40 is connected to pin 1 of connector J43. The four nickel plates 13 in the circuit are used for voltage sampling and AFE power supply.

[0076] In addition, such as Figure 6As shown, in the detection system of this utility model, the temperature sampling of the temperature acquisition circuit uses a voltage follower U41. Pin 1 of the voltage follower U41 is connected to pin 16 of the AFE chip U40, the first end of the TVS diode D46, and the first end of the capacitor C43. The second end of the capacitor C43 is connected to pin 21 of the AFE chip, Vbat_VM-_B. The second end of the TVS diode D46 is connected to Vbat_VM-_B. Pin 2 of the voltage follower U41 is connected to pin 21 of the AFE chip, Vbat_VM-_B. Pin 3 of the voltage follower U41 is connected to the first end of the TVS diode D45, the first end of the capacitor C44, and... The second terminal of resistor R46 is connected to pin 1 of the NTC. The first terminal of resistor R46 is connected to pin 15 (Vbat_VM+) of AFE chip U40. The second terminals of TVS diode D45 and capacitor C44 are connected to Vbat_VM-_B and then to pin 2 of the NTC. Pins 4 and 5 of voltage follower U41 are connected to the first terminal of capacitor C43 and then to pin 15 (Vbat_VM+) of AFE chip U40. In this circuit, the temperature of the positive and negative copper busbars is acquired by the NTC, converted into a voltage value, and output to the AFE chip via the voltage follower. The AFE chip then transmits the data to the BCU via daisy-chain communication. In the AFE chip, pin 18 (VHP) is connected to the first terminal of capacitor C41, and the second terminal of capacitor C41 is connected to Vbat_VM+. Pin 17 (VCHg) of the AFE chip is connected to Vbat_VM+. At Vbat_VM+, the nickel sheet 13 is laser-welded to the aluminum battery. Pins 4 (VCLg) and 5 (VCLm) of the AFE chip are connected in parallel to ground as Vbat_VM-_B. Here, the nickel sheet 13 is laser-welded to the aluminum battery. Vbat_VM+ and Vbat_VM-_B are used for cell voltage sampling and AFE power supply.

[0077] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An integrated busbar, characterized by, The application relates to a battery module and an integrated busbar. The battery module comprises a collecting circuit assembly and a battery slave module. The collecting circuit assembly comprises circuit boards and first connecting pieces.

2. The integrated busbar of claim 1, wherein, The battery slave module is installed on the circuit boards.

3. The integrated busbar of claim 1, wherein, The circuit boards are connected in series through the first connecting pieces.

4. The integrated busbar of claim 1, wherein, The battery slave module comprises an analog front-end chip.

5. The integrated busbar of claim 4, wherein, The analog front-end chip is installed on the circuit boards.

6. The integrated busbar of claim 5, wherein, The battery slave module further comprises a temperature detecting piece.

7. The integrated busbar of claim 6, wherein, The temperature detecting piece is installed on the circuit boards.

8. The integrated busbar of claim 1, wherein, The battery module further comprises second connecting pieces.

9. A battery pack, characterized by, At least two second connecting pieces are connected with one circuit board. The second connecting pieces are installed on both sides of the circuit boards perpendicularly to the series connection direction. The circuit boards are provided with connecting nickel sheets. The second connecting pieces are welded with the connecting nickel sheets. The collecting circuit assembly further comprises a bottom plate and a protective cover. The circuit boards connected in series are installed on the bottom plate through the second connecting pieces. The protective cover is installed on the bottom plate and is installed on the side far away from the circuit boards. The protective cover is provided with a avoiding hole. The third connecting pieces of the battery pass through the avoiding hole to connect the second connecting pieces. The circuit boards are flexible circuit boards. The first connecting pieces are flexible circuit boards. The battery module is provided with the integrated busbar. The integrated busbar is installed on the battery module. The detection system comprises a host computer, a communication line and the battery pack. The host computer is connected with the battery pack through the communication line.

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