Energy storage cell voltage sampling system

Abstract

The invention relates to an energy storage cell voltage sampling system. The system comprises a voltage sampling module, a data processing module and a communication module, the voltage sampling module comprises a plurality of voltage sampling channels, and each of the plurality of voltage sampling channels comprises a voltage sampling circuit and a multiplexer, the output end of an energy storage cell to be sampled is connected with the input end of each voltage sampling circuit; the output end of each voltage sampling circuit is connected with the input end of one multiplexer; the output end of each multiplexer is connected with the input end of the data processing module; the output end of the data processing module is connected with the input end of the communication module; and the output end of the communication module is connected with the upper computer. According to the scheme, the sampling precision of the battery cell is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of new energy batteries, and in particular to a voltage sampling system for energy storage cells. Background Art

[0002] In related technologies, with the development of new energy vehicles, the importance of battery management systems has been increasingly recognized. The voltage of energy storage cells is one of the most important parameters in a battery management system, and is of great significance for ensuring battery safety, extending battery life, and improving battery performance. At present, the commonly used voltage sampling method is to use a voltage divider circuit, but the voltage divider circuit has problems such as low accuracy and large temperature drift. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a voltage sampling system for an energy storage cell.

[0004] According to a first aspect of an embodiment of the present disclosure, a voltage sampling system for an energy storage cell is provided, comprising a voltage sampling module, a data processing module and a communication module, wherein the voltage sampling module comprises a plurality of voltage sampling channels, each of the plurality of voltage sampling channels comprises a voltage sampling circuit and a multiplexer, wherein:

[0005] The output end of the energy storage cell to be sampled is connected to the input end of each voltage sampling circuit respectively;

[0006] The output end of each voltage sampling circuit is respectively connected to the input end of a multiplexer;

[0007] The output end of each multiplexer is connected to the input end of the data processing module;

[0008] The output end of the data processing module is connected to the input end of the communication module;

[0009] The output end of the communication module is connected to the host computer.

[0010] In some embodiments of the present disclosure, the data processing module includes an ADC module, a counter, a comparator and a microcontroller, wherein:

[0011] The output end of each multiplexer is connected to the input end of the ADC module;

[0012] The output end of the ADC module is connected to the counter and the comparator respectively.

[0013] The ADC module, the counter, and the comparator are all connected to the microcontroller;

[0014] The output end of the microcontroller is connected to the communication module.

[0015] In some embodiments of the present disclosure, the communication module includes a serial port, wherein:

[0016] The output end of the microcontroller is connected to one end of the serial port;

[0017] The other end of the serial port is connected to the host computer.

[0018] In some embodiments of the present disclosure, the communication module includes a wireless communication submodule, wherein:

[0019] The microcontroller is connected to the remote monitoring system via the wireless communication module.

[0020] In some embodiments of the present disclosure, each of the voltage sampling circuits includes a voltage sensor and an operational amplifier, wherein:

[0021] For the voltage sampling circuit in each voltage sampling channel, the input end of the voltage sensor in the voltage sampling circuit is connected to the output end of the energy storage cell;

[0022] The output end of the voltage sensor is connected to the input end of the operational amplifier;

[0023] The output terminal of the operational amplifier is connected to the input terminal of a multiplexer.

[0024] According to a second aspect of an embodiment of the present disclosure, there is provided a battery pack, comprising the energy storage cell voltage sampling system as described in any one of claims 1 to 5.

[0025] According to a third aspect of an embodiment of the present disclosure, there is provided a power device comprising the battery pack as claimed in claim 6.

[0026] The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: by connecting the output end of the energy storage cell to be sampled to the input end of each voltage sampling circuit respectively; the output end of each voltage sampling circuit is connected to the input end of a multiplexer respectively; the output end of each multiplexer is connected to the input end of the data processing module; the output end of the data processing module is connected to the input end of the communication module; the output end of the communication module is connected to the host computer. Thus, the accuracy of cell sampling is improved.

[0027] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0029] Figure 1 The figure is a structural block diagram of a voltage sampling system for an energy storage cell according to an exemplary embodiment. DETAILED DESCRIPTION

[0030] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0031] The terms used in the disclosed embodiments are only for the purpose of describing specific embodiments, and are not intended to limit the disclosed embodiments. The singular forms "a", "an" and "the" used in the disclosed embodiments and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0032] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the disclosed embodiments, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the disclosed embodiments, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at" or "when" or "in response to determination".

[0033] In addition, various forms of processes shown in the embodiments of the present disclosure may be used to reorder, add or delete steps. For example, the steps described in the present application may be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution disclosed in the present disclosure can be achieved, and this document does not limit this.

[0034] In related technologies, with the development of new energy vehicles, the importance of battery management systems has been increasingly recognized. The voltage of energy storage cells is one of the most important parameters in a battery management system, and is of great significance for ensuring battery safety, extending battery life, and improving battery performance. At present, the commonly used voltage sampling method is to use a voltage divider circuit, but the voltage divider circuit has problems such as low accuracy and large temperature drift.

[0035] In order to solve the above problems, the present disclosure provides a voltage sampling system for energy storage cells, which improves the accuracy of cell sampling by connecting the output end of the energy storage cells to be sampled to the input end of each voltage sampling circuit respectively; the output end of each voltage sampling circuit is connected to the input end of a multiplexer respectively; the output end of each multiplexer is connected to the input end of the data processing module; the output end of the data processing module is connected to the input end of the communication module; and the output end of the communication module is connected to the host computer.

[0036] Figure 1 is a structural schematic diagram of a voltage sampling system for an energy storage cell according to an exemplary embodiment. Figure 1 As shown, the system may include a voltage sampling module, a data processing module and a communication module, wherein the voltage sampling module includes a plurality of voltage sampling channels, each of the plurality of voltage sampling channels includes a voltage sampling circuit and a multiplexer, wherein:

[0037] The output end of the energy storage cell to be sampled is connected to the input end of each voltage sampling circuit respectively;

[0038] The output end of each voltage sampling circuit is respectively connected to the input end of a multiplexer;

[0039] The output end of each multiplexer is connected to the input end of the data processing module;

[0040] The output end of the data processing module is connected to the input end of the communication module;

[0041] The output end of the communication module is connected to the host computer.

[0042] It should be noted that the voltage sampling module includes multiple voltage sampling channels, each of which is composed of a precision voltage sampling circuit and a high-performance multiplexer. The voltage sampling circuit itself consists of a highly sensitive voltage sensor and a precision operational amplifier, which is used to quickly and accurately convert the voltage signal of the energy storage cell into a digital voltage value and amplify it to a specific range when necessary. In this way, the voltage signal can be accurately quantified and amplified to meet various application requirements.

[0043] In some embodiments of the present disclosure, the data processing module includes an ADC module, a counter, a comparator and a microcontroller, wherein:

[0044] The output end of each multiplexer is connected to the input end of the ADC module;

[0045] The output end of the ADC module is connected to the counter and the comparator respectively.

[0046] The ADC module, the counter, and the comparator are all connected to the microcontroller;

[0047] The output end of the microcontroller is connected to the communication module.

[0048] In the disclosed embodiment, the data processing module receives the voltage value from the voltage sampling module and performs necessary mathematical operations and algorithms to extract useful information, such as battery status, remaining power, charge and discharge performance, etc. The data processing module includes multiple ADC modules, multiple counters, multiple comparators and a microcontroller. The ADC module is used to convert the voltage value into a digital signal, the counter is used to calculate the charging and discharging time of the battery cell, and the comparator is used to compare the voltage value of the battery cell with a preset safety threshold to determine the safety state of the battery cell. The microcontroller is used to control the operation of the ADC module, the counter and the comparator, process the sampled data, determine the safety state of the battery cell, and transmit the data to the host computer.

[0049] In some embodiments of the present disclosure, the communication module includes a serial port, wherein:

[0050] The output end of the microcontroller is connected to one end of the serial port;

[0051] The other end of the serial port is connected to the host computer.

[0052] In some embodiments of the present disclosure, the communication module includes a wireless communication submodule, wherein:

[0053] The microcontroller is connected to the remote monitoring system via the wireless communication module.

[0054] In the disclosed embodiment, the data processing module receives the voltage value from the voltage sampling module and performs necessary mathematical operations and algorithms to extract useful information, such as battery status, remaining power, charge and discharge performance, etc. The data processing module includes multiple ADC modules, multiple counters, multiple comparators and a microcontroller. The ADC module is used to convert the voltage value into a digital signal, the counter is used to calculate the charging and discharging time of the battery cell, and the comparator is used to compare the voltage value of the battery cell with a preset safety threshold to determine the safety state of the battery cell. The microcontroller is used to control the operation of the ADC module, the counter and the comparator, process the sampled data, determine the safety state of the battery cell, and transmit the data to the host computer.

[0055] In some embodiments of the present disclosure, each of the voltage sampling circuits includes a voltage sensor and an operational amplifier, wherein:

[0056] For the voltage sampling circuit in each voltage sampling channel, the input end of the voltage sensor in the voltage sampling circuit is connected to the output end of the energy storage cell;

[0057] The output end of the voltage sensor is connected to the input end of the operational amplifier;

[0058] The output terminal of the operational amplifier is connected to the input terminal of a multiplexer.

[0059] In one embodiment, the voltage sampling module includes multiple voltage sampling channels, each of which is composed of a precision voltage sampling circuit and a high-performance multiplexer. The voltage sampling circuit itself is composed of a highly sensitive voltage sensor and a precision operational amplifier, which is used to quickly and accurately convert the voltage signal of the energy storage cell into a digital voltage value and amplify it to a specific range when necessary. In this way, the voltage signal can be accurately quantized and amplified to meet various application requirements.

[0060] According to the energy storage cell voltage sampling system proposed in the embodiment of the present disclosure, the output end of the energy storage cell to be sampled is respectively connected to the input end of each voltage sampling circuit; the output end of each voltage sampling circuit is respectively connected to the input end of a multiplexer; the output end of each multiplexer is connected to the input end of the data processing module; the output end of the data processing module is connected to the input end of the communication module; and the output end of the communication module is connected to the host computer. This improves the accuracy of cell sampling.

[0061] The disclosed embodiment also provides a battery pack, comprising the battery cell voltage control circuit as described above.

[0062] The disclosed embodiment also proposes a power device, including the battery pack as described above, and the power device is, for example, an electric car, a hybrid electric car, a battery car, a robot, and a drone.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this disclosure, "plurality" means two or more.

[0064] The above, unless otherwise clearly defined.

[0065] In the present disclosure, unless otherwise clearly specified and limited, the terms "enter", "connect", "connection", etc. 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0067] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure without departing from the principles and purpose of the present disclosure.

Claims

1. A voltage sampling system for an energy storage cell, characterized in that: It includes a voltage sampling module, a data processing module and a communication module. The voltage sampling module includes a plurality of voltage sampling channels. Each of the plurality of voltage sampling channels includes a voltage sampling circuit and a multiplexer. The output end of the energy storage cell to be sampled is connected to the input end of each voltage sampling circuit respectively; The output end of each voltage sampling circuit is respectively connected to the input end of a multiplexer; The output end of each multiplexer is connected to the input end of the data processing module; The output end of the data processing module is connected to the input end of the communication module; The output end of the communication module is connected to the host computer.

2. The energy storage cell voltage sampling system according to claim 1, characterized in that: The data processing module includes an ADC module, a counter, a comparator and a microcontroller, wherein: The output end of each multiplexer is connected to the input end of the ADC module; The output end of the ADC module is connected to the counter and the comparator respectively. The ADC module, the counter, and the comparator are all connected to the microcontroller; The output end of the microcontroller is connected to the communication module.

3. The energy storage cell voltage sampling system according to claim 2, characterized in that: The communication module includes a serial port, wherein: The output end of the microcontroller is connected to one end of the serial port; The other end of the serial port is connected to the host computer.

4. The energy storage cell voltage sampling system according to claim 2, characterized in that: The communication module includes a wireless communication submodule, wherein: The microcontroller is connected to the remote monitoring system via the wireless communication module.

5. The energy storage cell voltage sampling system according to claim 1, characterized in that: Each of the voltage sampling circuits comprises a voltage sensor and an operational amplifier, wherein: For the voltage sampling circuit in each voltage sampling channel, the input end of the voltage sensor in the voltage sampling circuit is connected to the output end of the energy storage cell; The output end of the voltage sensor is connected to the input end of the operational amplifier; The output terminal of the operational amplifier is connected to the input terminal of a multiplexer.

6. A battery pack, characterized in that: It comprises the energy storage cell voltage sampling system as described in any one of claims 1 to 5.

7. A power device, characterized in that: Comprising the battery pack as claimed in claim 6.

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