High safety battery sampling data line circuit

Abstract

The application relates to a high-safety battery sampling data line circuit. The high-safety battery sampling data line circuit comprises a battery pack, a collection module and an analog front-end module, the collection module comprises a plurality of sampling lines, an arbitrary sampling line in each adjacent two sampling lines is provided with a fuse, and a first end of the fuse is electrically connected with the battery pack; and a second end of the fuse is electrically connected with the analog front-end module. According to the scheme, the sampling signal line can be quickly disconnected when the sampling signal line is short-circuited, so that the short circuit of the battery pack is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a high-safety battery sampling data line circuit. Background Technology

[0002] In related technologies, multiple battery positive terminal sampling signal lines of the BMS battery pack are introduced from the battery positive terminal to the BMS PCB board. If a partial short circuit occurs in the BMS PCB board circuit or an accidental short circuit occurs in an adjacent socket, it will cause a short circuit between adjacent sampling signal lines. This is equivalent to the wires directly short-circuiting the positive and negative terminals of the internal cells of the battery pack, which poses a great safety hazard. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-safety battery sampling data line circuit that can quickly disconnect when the sampling signal line is short-circuited, thereby avoiding short circuits in the battery pack cells.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] The first aspect of this application provides a high-safety battery sampling data line circuit, comprising: a battery pack; a acquisition module including a plurality of sampling lines, wherein a fuse is provided on any one of two adjacent sampling lines, and the first end of the fuse is electrically connected to the battery pack; and an analog front-end module, wherein the second end of the fuse is electrically connected to the analog front-end module.

[0006] The sampling module also includes a first port, through which the fuse is electrically connected to the analog front-end module.

[0007] It also includes a first MOSFET, and the battery pack is electrically connected to the first MOSFET.

[0008] It also includes a second port, through which the first MOS transistor is electrically connected to the analog front-end module.

[0009] It also includes a second MOSFET, and the first MOSFET is electrically connected to the second MOSFET.

[0010] It also includes a third port, through which the second MOS transistor is electrically connected to the analog front-end module.

[0011] It also includes a voltage divider resistor, which is electrically connected to the battery pack.

[0012] It also includes a fourth port, through which the voltage divider resistor is electrically connected to the analog front-end module.

[0013] It also includes an MCU module, which is electrically connected to the analog front-end module.

[0014] The number of the first ports is the same as the number of the sampling lines.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] By setting a fuse on any one of the two adjacent sampling lines, the fuse can quickly blow when a short circuit occurs on any sampling line, thus preventing short circuits in the battery pack cells and ensuring that the chips in the analog front-end module are not damaged. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0018] Figure 1 This is a schematic diagram of the high-safety battery sampling data line circuit in one embodiment of the present invention. Detailed Implementation

[0019] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0020] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0021] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Multiple battery positive terminal sampling signal lines in the BMS battery pack are introduced from the battery positive terminal to the BMS PCB board. If a partial short circuit occurs in the BMS PCB board circuit or an accidental short circuit occurs in an adjacent socket, it will cause a short circuit between adjacent sampling signal lines. This is equivalent to the wires directly short-circuiting the positive and negative terminals of the battery cells inside the battery pack, which poses a great safety hazard.

[0023] To address the aforementioned issues, this application provides a high-safety battery sampling data line circuit that can quickly disconnect when the sampling signal line is short-circuited, thereby preventing short circuits in the battery pack cells.

[0024] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0025] Please see Figure 1 A high-safety battery sampling data line circuit includes: a battery pack 100, a data acquisition module 200, and an analog front-end module 300; the data acquisition module 200 includes a plurality of sampling lines 210, and a fuse 220 is provided on any one of two adjacent sampling lines 210. The first end of the fuse 220 is electrically connected to the battery pack 100; the second end of the fuse 220 is electrically connected to the analog front-end module 300.

[0026] It should be noted that the battery pack 100 contains several individual battery cells. This application uses four individual battery cells, and each sampling line 210 is electrically connected to two adjacent individual battery cells. Furthermore, the sampling line 210 is responsible for collecting signals such as voltage and temperature from the individual battery cells. Under normal operating conditions, the current is extremely small. However, when there is an internal short circuit in the cell, insulation damage to the sampling line 210, or accidental external contact, a large current may be generated instantaneously, directly burning out the AFE chip of the analog front-end module 300 or causing a BMS malfunction. Therefore, this application uses a series-connected fuse 220 to quickly blow when the current in the sampling line 210 exceeds a threshold, cutting off the fault circuit and preventing a large current from entering the analog front-end module 300, thus preventing damage to the ADC unit inside the chip of the analog front-end module 300 or logic disorder. Secondly, the fuse 220 in this application does not affect the sampling of other cells after blowing, preventing the BMS from misjudging the overall state due to a local fault. Finally, after the fuse 220 blows, the faulty battery cell can be quickly located without replacing the entire BMS module, simplifying the fault diagnosis process.

[0027] See Figure 1In one embodiment, the sampling module 200 further includes a first port 230, through which the fuse 220 is electrically connected to the analog front-end module 300. Specifically, it also includes a first MOSFET 400, through which the battery pack 100 is electrically connected. Specifically, it also includes a second port 500, through which the first MOSFET 400 is electrically connected to the analog front-end module 300. Specifically, it also includes a second MOSFET 600, through which the first MOSFET 400 is electrically connected to the second MOSFET 600. Specifically, it also includes a third port 700, through which the second MOSFET 600 is electrically connected to the analog front-end module 300.

[0028] It should be noted that the first MOSFET 400 and the second MOSFET 500 function as switches.

[0029] See Figure 1 In one embodiment, a voltage divider resistor 800 is further included, which is electrically connected to the battery pack 100. Specifically, a fourth port 900 is also included, through which the voltage divider resistor 800 is electrically connected to the analog front-end module 300.

[0030] It should be noted that the 800Ω voltage divider resistor serves to divide the voltage and limit the current.

[0031] See Figure 1 In one embodiment, it also includes an MCU module 1000, which is electrically connected to the analog front-end module 300.

[0032] It is understandable that the MCU module 1000 is used to receive real-time data such as cell voltage, current, and temperature collected by the analog front-end module 300, as well as external sensor signals, and eliminate noise through filtering algorithms to ensure the reliability of input data.

[0033] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0034] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A high-safety battery sampling data line circuit, characterized in that, include: Battery pack; The acquisition module includes several sampling lines, and a fuse is provided on any one of the two adjacent sampling lines. The first end of the fuse is electrically connected to the battery pack. The second end of the fuse is electrically connected to the analog front-end module.

2. The high-safety battery sampling data line circuit according to claim 1, characterized in that, The sampling module also includes a first port, through which the fuse is electrically connected to the analog front-end module.

3. The high-safety battery sampling data line circuit according to claim 1, characterized in that, It also includes a first MOSFET, and the battery pack is electrically connected to the first MOSFET.

4. The high-safety battery sampling data line circuit according to claim 3, characterized in that, It also includes a second port, through which the first MOS transistor is electrically connected to the analog front-end module.

5. The high-safety battery sampling data line circuit according to claim 3, characterized in that, It also includes a second MOSFET, and the first MOSFET is electrically connected to the second MOSFET.

6. The high-safety battery sampling data line circuit according to claim 5, characterized in that, It also includes a third port, through which the second MOS transistor is electrically connected to the analog front-end module.

7. The high-safety battery sampling data line circuit according to claim 1, characterized in that, It also includes a voltage divider resistor, which is electrically connected to the battery pack.

8. The high-safety battery sampling data line circuit according to claim 7, characterized in that, It also includes a fourth port, through which the voltage divider resistor is electrically connected to the analog front-end module.

9. The high-safety battery sampling data line circuit according to claim 1, characterized in that, It also includes an MCU module, which is electrically connected to the analog front-end module.

10. The high-safety battery sampling data line circuit according to claim 2, characterized in that, The number of the first ports is the same as the number of the sampling lines.

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