Tandem common-ground multi-point voltage measurement framework

Abstract

The utility model provides a serial common-ground multi-point voltage measuring framework, which comprises a battery voltage collector and a plurality of batteries connected in series, in the plurality of batteries connected in series, a detection line is respectively connected between every two adjacent batteries and outside the batteries at two ends, the detection lines are connected to the battery voltage collector, and in the detection lines, the battery voltage collector is connected with the battery voltage collector. Wherein one of the detection lines is set as a common reference ground wire, the battery voltage collector collects the voltage between the other detection lines and the common reference ground wire, and a resistor is bridged on one of the common reference ground wire and the other detection lines. According to the scheme of the utility model, the unique characteristic of the battery voltage acquisition data is given under the condition that any detection line is broken, and the background can quickly and accurately judge the broken line condition of the detection line according to the data with the corresponding characteristic, so that the time, manpower and material resources are saved, the efficiency is effectively improved, and the maintenance cost of equipment in engineering application is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dynamic ring detection, in particular to a serial common ground multi-point voltage measurement architecture. Background Art

[0002] The most intuitive and simple hardware solution for collecting and measuring the voltage of a single battery in series is to use one voltage collector per battery, with the collectors isolated from each other. This single-cell voltage collection solution increases the cost of hardware electronics and cabling.

[0003] In a more optimized solution, a single battery voltage collector is used to measure the voltages of multiple batteries. This is a common-ground type hardware architecture for measuring the voltages of multiple batteries. This hardware architecture saves on the number of hardware isolation devices, power supplies, measurement ICs, and voltage detection cables, thereby reducing costs.

[0004] like Figure 1 As shown in the figure, this measurement architecture uses a single battery voltage collector to measure the voltage of 6 batteries. It is a common ground type hardware architecture for measuring the voltage of multiple batteries. This hardware architecture saves the number of hardware isolation devices, power supplies, measurement ICs and voltage detection cables, thereby reducing costs.

[0005] like Figure 1 As shown, six batteries share one battery voltage collector, and detection lines 1 to 7 are arranged between the batteries and at both ends of the batteries, among which detection line 4 serves as the common reference GND of the hardware device.

[0006] When measuring voltage, for this hardware architecture:

[0007] Vbat1=V1-V2;

[0008] Vbat2=V2-V3;

[0009] Vbat3=V3;

[0010] Vbat4=V4;

[0011] Vbat5=V4-V5;

[0012] Vbat6=V5-V6.

[0013] However, in actual engineering applications, problems such as poor contact and disconnection of detection lines often occur due to improper installation, accidental contact, looseness, etc. Figure 1As shown in the architecture diagram, when detection lines 1-3 or 5-7 are disconnected, only the voltage measurement of the battery corresponding to that detection line is affected, without affecting the voltage collection of other batteries or the normal operation of the hardware equipment. However, detection line 4 is special because it has a common ground. When detection line 4 is disconnected, the voltages of all six batteries measured by the measurement device BT6 are garbled. The backend cannot determine from the reported garbled data whether the problem is a detection line disconnection, a malfunction of the BT6's MCU or measurement IC, or an error or data loss in the MCU program data. This makes it difficult to locate the problem in engineering applications and increases the difficulty and cost of repairs. Utility Model Content

[0014] The purpose of the present utility model is to provide an improved series common ground multi-point voltage measurement architecture to solve the problem in product solutions using the series common ground multi-point voltage measurement architecture, such as the hardware solution for measuring the voltages of multiple batteries in a series battery pack using a common ground. In actual engineering applications, if the reference ground detection line is broken, the voltage acquisition of the voltage collector will be disrupted, making it impossible to determine the specific cause of the accident.

[0015] To achieve the above objectives, the present invention provides the following technical solutions:

[0016] A serial common-ground multi-point voltage measurement architecture includes a battery voltage collector and several batteries connected in series. Among the batteries connected in series, a detection line is connected between every two adjacent batteries and on the outside of the batteries at both ends. The detection lines are connected to the battery voltage collector. Among these detection lines, one is set as a common reference ground line. The battery voltage collector collects the voltage between the other detection lines and the common reference ground line. A resistor is connected across the common reference ground line and one of the other detection lines.

[0017] Preferably, the resistor is connected across the common reference ground line and the adjacent detection line.

[0018] In another preferred embodiment, the common reference ground line is the one close to the middle of all the detection lines.

[0019] Compared with the existing technology, the beneficial effect of the present invention is that in products using a common reference ground hardware circuit architecture for serial multi-point voltage acquisition and measurement, the solution of the present invention provides unique characteristics for battery voltage acquisition data when any detection line is disconnected. The background can quickly and accurately determine the disconnection of the detection line based on data with corresponding characteristics, saving time, manpower and material resources, effectively improving efficiency and reducing maintenance costs of equipment in engineering applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a schematic diagram of the structure of a series common ground multi-point voltage measurement architecture in the prior art;

[0021] Figure 2 It is a schematic diagram of the structure of the utility model solution;

[0022] Figure 3 It is a schematic diagram of the measurement principle of the utility model when the shared detection line is broken. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] like Figure 2As shown, the present invention provides a serial common-ground multi-point voltage measurement architecture, including a battery voltage collector and several batteries connected in series. Within the series-connected batteries, a detection line is connected between every two adjacent batteries and from the outside of the batteries at both ends. The detection lines are connected to the battery voltage collector. One of these detection lines is set as a common reference ground line. The battery voltage collector collects the voltage between the other detection lines and the common reference ground line. A resistor is connected across the common reference ground line and one of the other detection lines. After the battery voltage collector collects the voltage between the detection lines and the common reference ground line, it calculates the voltage of each battery.

[0027] While the figure shows six batteries connected in series and the detection lines between them, the battery string can be extended as shown, and more detection lines can still be installed within it. Of course, the size of the battery string can also be reduced. Therefore, the scope of protection of the present invention should not be limited by the number of batteries shown in the figure. Similarly, the detection lines can be placed in the center as shown, on either side, or anywhere in between, as long as they are convenient for installation in practical applications. For example, if BAT1, BAT2, and BAT3 are removed in whole or in part, the detection line 4 used as the common reference ground line can be considered to be located on one side of the detection line string. Therefore, the position of the detection line used as the common reference ground line shown in the figure should not limit the scope of protection. Of course, as a more preferred solution, the common reference ground line is placed as close to the center as possible. Furthermore, the resistor connection position can be connected at different locations according to actual needs, as long as one end is connected to the detection line used as the common reference ground line. The corresponding analysis logic should also be appropriately modified depending on the detection line connected to the other end, but this is within the skill of ordinary technicians in the industry. Of course, for a more general and convenient solution, the resistor is more preferably connected across the common reference ground line and its adjacent detection line. Therefore, the connection position of the resistor shown in the figure is only a preferred representative embodiment of the present invention and should not limit the scope of protection of the present invention.

[0028] The principle of the present invention will be described in more detail below with reference to the illustrative embodiments shown in the accompanying drawings.

[0029] The utility model provides a battery voltage acquisition solution for a series battery pack with multiple batteries sharing a common ground to solve the problem of detecting a broken reference ground detection line. Figure 2 The solution shown.

[0030] To solve the problem of multiple battery voltages in series battery pack with common ground type battery voltage collection scheme, the voltage collector voltage measurement garbled code caused by the reference ground detection line being broken cannot be determined whether it is a detection line break problem, collector MCU or measurement IC hardware failure, collector MCU program software failure problem, such as Figure 2 As shown, a resistor R is added between the detection line 5 and the detection line 4 serving as a reference ground. The resistance value of the resistor R must not affect the measurement accuracy of the battery voltage.

[0031] When all detection lines are in good contact, the reference GND for voltage measurement of battery 1 to battery 6 is still the potential point of detection line 4. That is:

[0032] Vbat1=V1-V2;

[0033] Vbat2=V2-V3;

[0034] Vbat3=V3;

[0035] Vbat4=V4;

[0036] Vbat5=V4-V5;

[0037] Vbat6=V5-V6.

[0038] If detection lines 1-3 or 5-7 are disconnected, this will only affect the voltage measurement of the battery corresponding to that detection line. It will not affect the voltage collection of other batteries or the normal operation of the hardware. For example, if detection line 2 is disconnected, according to the voltage formula above, the voltage measurement results of Vbat1 and Vbat2 will be garbled, but the voltage collection results of Vbat3-Vbat6 will be normal. Based on the garbled Vbat1 and Vbat2 values ​​in the reported data and the normal voltage collection results of Vbat3-Vbat6, the background data can infer that detection line 2, connecting bat1 and bat2, is disconnected.

[0039] However, if detection line 4 (reference ground) is disconnected, due to the shared nature of this detection line, the voltages of all six batteries measured by the measuring device are garbled, making it impossible to determine the battery voltage. However, in the present invention, a resistor R is added between detection lines 4 and 5 within the measuring device. When detection line 4 is disconnected, the reference ground is automatically connected to detection line 5 via resistor R.

[0040] Since Vbat1 = V1-V2; Vbat2 = V2-V3; Vbat5 = V4-V5; and Vbat6 = V5-V6, the voltages of Vbat1, Vbat2, Vbat5, and Vbat6 are unaffected and can be measured normally. Vbat4 = V4 = 0V; and Vbat3 = V3 = the sum of the voltages of battery 3 and battery 4. This gives a very typical characteristic in the collected data: when detection line 4 (reference ground) is broken, Vbat4 = 0V, Vbat3 is the voltage of the two batteries, and Vbat1, Vbat2, Vbat5, and Vbat6 are all normal values. When the background analyzes the data reported by the battery voltage collector BT6, it can be judged that the software and hardware of the BT6 MCU and the measurement IC are normal based on the normal voltages of Vbat1, Vbat2, Vbat5, and Vbat6 in the data; based on the data that Vbat4=0V and Vbat3 are the voltages of two batteries, it can be judged that the detection line 4 (reference ground) is broken, and the engineering department can be quickly notified to conduct on-site inspection and repair.

[0041] If both detection lines 4 and 5 are disconnected, the data characteristics described above are as follows: Vbat4 = 0V; Vbat1, Vbat2, Vbat3, Vbat5, and Vbat6 are garbled. This data characteristic allows for quick and effective determination that both detection lines 4 and 5 are disconnected and that the MCU and measurement IC's hardware and software are functioning properly.

[0042] Thus, the solution of the present invention can effectively solve the problem of detecting a disconnection of the reference ground detection line in a battery voltage acquisition solution with a common ground for multiple batteries in a series-connected battery pack.

[0043] The present invention provides a hardware circuit solution for automatically changing the reference ground in the event of a reference ground anomaly within a common reference ground hardware circuit architecture for serial multi-point voltage acquisition and measurement. Furthermore, the solution provides a hardware circuit solution that can uniquely characterize the battery voltage data collected when any detection line is disconnected. This solution uniquely characterizes the battery voltage data collected when any detection line is disconnected, allowing the backend to quickly and accurately determine the disconnection status of the detection line based on the corresponding data. This saves time, manpower, and material resources, effectively improving efficiency and reducing equipment maintenance costs in engineering applications.

[0044] Anything not described in detail in the present invention is well known to those skilled in the art.

[0045] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified and replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A serial common-ground multi-point voltage measurement architecture, comprising a battery voltage collector and a plurality of batteries connected in series. A detection line is connected between each pair of adjacent batteries and from the outside of the batteries at both ends. The detection lines are connected to the battery voltage collector. One of the detection lines is configured as a common reference ground line. The battery voltage collector collects the voltage between the other detection lines and the common reference ground line. The architecture is characterized by: A resistor is connected across the common reference ground line and one of the other detection lines.

2. The serial common ground multi-point voltage measurement architecture according to claim 1, wherein: The resistor is connected across the common reference ground line and the adjacent detection line.

3. The serial common ground multi-point voltage measurement architecture according to claim 1, wherein: The common reference ground line is the one close to the middle of all the detection lines.

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