Battery data sampling system, method, and vehicle

Abstract

The application discloses a battery data sampling system, method and vehicle. The system comprises: a reference source module configured to output a reference voltage signal; a data sampling module connected with the reference source module and an external battery, configured to sample a battery voltage signal and a temperature signal of the external battery to obtain battery data of the external battery, and sample the reference voltage signal to obtain an external reference voltage; and a battery management unit connected with the data sampling module, configured to correct the battery data based on the reference voltage to obtain target battery data. The application solves the technical problem of low measurement accuracy when measuring battery data in a high-temperature or low-temperature environment in the related art.

Description

Technical Field

[0001] This invention relates to the field of data processing, and more specifically, to a battery data sampling system, method, and vehicle. Background Technology

[0002] Stable vehicle battery operation data is a crucial indicator of vehicle safety. To improve the efficiency and accuracy of vehicle data sampling, most current methods involve setting an internal reference source within the data sampling module. This provides an internal reference voltage that can be used as a sampling standard, and the target data to be sampled, such as battery voltage and temperature, is calculated based on this internal reference voltage. However, the output voltage of the internal reference source is easily affected by the ambient temperature, especially in extreme temperature environments such as high and low temperatures. This can lead to significant offset errors in the provided internal reference voltage, resulting in low accuracy of the final sampling results when the system samples the target data based on the internal reference voltage.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] This invention provides a battery data sampling system, method, and vehicle to at least address the technical problem of low measurement accuracy when measuring battery data in high or low temperature environments in related technologies.

[0005] According to one aspect of the present invention, a battery data sampling system is provided, comprising: a reference source module for outputting a reference voltage signal; a data sampling module connected to the reference source module and an external battery cell for sampling the battery voltage signal and temperature signal of the external battery cell to obtain battery data of the external battery cell, and sampling the reference voltage signal to obtain an external reference voltage; and a battery management unit connected to the data sampling module for correcting the battery data based on the reference voltage to obtain target battery data.

[0006] Optionally, the data sampling module includes: a voltage sampling unit connected to an external battery cell via a voltage sampling channel for sampling the battery voltage signal output by the external battery cell; a temperature sampling unit connected to the external battery cell and a reference source module via a temperature sampling channel for sampling the temperature signal and reference voltage signal output by the external battery cell; an internal reference source unit for outputting an internal reference voltage; and an analog-to-digital conversion unit connected to the voltage sampling unit, the temperature sampling unit, and the internal reference source unit for converting the battery voltage signal and temperature signal into battery data based on the internal reference voltage.

[0007] Optionally, the system further includes: a first register connected to the temperature sampling channel for storing a reference voltage signal; a second register connected to the voltage sampling channel for storing a battery voltage signal; and a third register connected to the temperature sampling channel for storing a temperature signal.

[0008] Optionally, the battery management unit is also used to determine a sampling correction factor based on the quotient of the external reference voltage output by the reference source module and the value of the first register; to determine the target cell voltage based on the product of the correction factor and the value of the second register; and to determine the target module temperature based on the product of the correction factor and the value of the third register.

[0009] Optionally, the numerical accuracy of the external reference voltage is the same as the number of bits in the analog-to-digital conversion of the data sampling module.

[0010] Optionally, the data sampling module provides voltage to the reference source module.

[0011] Optionally, the system also includes: a preset DC chopper module, connected to an external battery cell and a reference source module, for providing voltage to the reference source module.

[0012] Optionally, the system also includes: a high-low voltage isolated power supply module, connected to the power supply and the reference source module, for providing voltage to the reference source module based on the low voltage provided by the power supply.

[0013] According to another aspect of the present invention, a battery data sampling method is also provided, comprising: acquiring a first register value and an external reference voltage output by an external reference source, wherein the first register value is used to characterize a reference voltage signal value obtained by sampling the external reference source using a first preset channel; obtaining a correction factor based on the quotient of the external reference voltage and the first register value; determining target battery data of an external battery cell based on the product of the correction factor and the second register value, and the product of the correction factor and the third register value, wherein the second register value is used to characterize a voltage signal value obtained by sampling the external battery cell using a second preset channel, and the third register value is used to characterize a temperature signal value obtained by sampling the external battery cell using the first preset channel.

[0014] Optionally, the first preset channel is a temperature sampling channel, and the second preset channel is a voltage sampling channel.

[0015] Optionally, the method further includes: obtaining the numerical precision of an external reference source; and determining the conversion bit depth of the data sampling module based on the numerical precision.

[0016] Optionally, the method further includes: in response to the power-on of the data sampling module, providing a voltage to an external reference source based on the data sampling module.

[0017] Optionally, the method further includes: in response to the presence of a preset DC chopper, controlling an external battery cell to provide voltage to an external reference source based on the preset DC chopper.

[0018] Optionally, the method further includes: in response to the presence of a power supply and a high-low voltage isolation power supply, controlling the power supply to provide voltage to an external reference source based on the high-low voltage isolation power supply.

[0019] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to execute the battery data sampling method of the above-described method embodiments.

[0020] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes the battery data sampling method of the above-described method embodiments.

[0021] According to another aspect of the present invention, a vehicle is also provided, including the battery data sampling system described above.

[0022] In this embodiment of the invention, the battery data sampling system may include a reference source module, a data sampling module connected to the reference source module and an external battery cell, and a battery management unit connected to the data sampling module. The data sampling module samples the battery voltage and temperature signals of the external battery cell to obtain battery data for the external battery cell, samples the reference voltage signal to obtain an external reference voltage, and the battery management unit corrects the battery data based on the reference voltage to obtain the target battery data. It is noteworthy that this invention can output a stable reference voltage to the data sampling module by connecting a reference source module externally. Then, by utilizing the proportional relationship between the battery data sampled by the data sampling module, the battery data is corrected in the battery management unit without needing to consider the temperature of the battery's environment. This avoids the internal reference source of the sampling module being unable to output a stable internal reference voltage due to extreme temperatures, leading to inaccurate battery data. This achieves the technical effect of improving the accuracy of battery data measurement, thereby solving the technical problem of low measurement accuracy when measuring battery data in high or low temperature environments in related technologies. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure of a battery data sampling system according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram illustrating the detailed structure of a first sampling system according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram illustrating the detailed structure of a second sampling system according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram illustrating the detailed structure of a third sampling system according to an embodiment of the present invention;

[0028] Figure 5 This is a flowchart illustrating a battery data sampling method according to an embodiment of the present invention. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] Example 1

[0032] According to an embodiment of the present invention, a system embodiment for battery data sampling is provided.

[0033] Figure 1 This is a schematic diagram of a battery data sampling system according to an embodiment of the present invention, as shown below. Figure 1 As shown, the system may include the following modules: a reference source module 102, a data sampling module 104, and a battery management unit 106.

[0034] The reference source module 102 is used to output a reference voltage signal.

[0035] The aforementioned reference source module can refer to an external reference source capable of outputting a stable reference voltage. In one embodiment, an external reference voltage source connected to the data sampling module can be set up, and the stable reference voltage output by the external reference source can be used to correct the battery data sampled by the data sampling module. The specific correction process can be performed in the battery management unit, and will not be described in detail here.

[0036] The data sampling module 104 is connected to the reference source module and the external battery cell. It is used to sample the battery voltage signal and temperature signal of the external battery cell to obtain the battery data of the external battery cell, and to sample the reference voltage signal to obtain the external reference voltage.

[0037] The aforementioned data sampling module refers to a system module capable of sampling battery data. Since the voltage and temperature data of a battery are important indicators for judging whether the battery performance is good, the data sampling module can generally sample the voltage and temperature signals output by the battery in real time to obtain the battery's voltage and battery data at different times.

[0038] The aforementioned external cells can refer to the vehicle battery that needs to be sampled for data. Generally, a vehicle battery can be composed of multiple external cells connected in series. Therefore, in one optional solution of this embodiment, a resistor with the same resistance value can be connected in parallel for each external cell. When using the data sampling module to sample the vehicle battery, the cell signal output by each external cell can be sampled directly, and then the sampled signal data can be integrated and processed to improve the accuracy of the sampled battery data.

[0039] In one optional embodiment, in order to facilitate the correction processing of the battery data sampled by the data sampling module, the data sampling module can be connected to an external battery cell, an external reference source, and a battery management unit simultaneously.

[0040] In one alternative embodiment, the data sampling module can also be used to sample the reference voltage signal output by the external reference source. Since the reference voltage output by the external reference source is a stable value, after the data sampling module samples the reference voltage signal, the voltage value corresponding to the signal can be used as a reference value. Then, the battery management unit can use the reference value to correct the sampled battery data.

[0041] Optionally, the data sampling module includes: a voltage sampling unit connected to an external battery cell via a voltage sampling channel for sampling the battery voltage signal output by the external battery cell; a temperature sampling unit connected to the external battery cell and a reference source module via a temperature sampling channel for sampling the temperature signal and reference voltage signal output by the external battery cell; an internal reference source unit for outputting an internal reference voltage; and an analog-to-digital conversion unit connected to the voltage sampling unit, the temperature sampling unit, and the internal reference source unit for converting the battery voltage signal and temperature signal into battery data based on the internal reference voltage.

[0042] The aforementioned internal reference source unit can refer to the unit used to provide an internal reference voltage for the data sampling module. Under normal circumstances, such as when sampling battery data in a moderate temperature environment, the battery management unit can directly determine the target data of the battery based on the internal reference voltage provided by the internal reference source.

[0043] The aforementioned analog-to-digital conversion unit can refer to a unit that converts sampled battery signals into battery data. For example, it can convert sampled battery voltage signals into battery voltage, and sampled temperature signals into battery temperature. In an optional embodiment, to improve the working efficiency of the analog-to-digital conversion unit, it can be directly connected to the voltage sampling unit, the temperature sampling unit, and the internal reference source module. If the current ambient temperature is suitable, the analog-to-digital conversion unit can directly convert the signals collected by the sampling units into battery data using the internal reference voltage provided by the internal reference source as the standard.

[0044] In one optional embodiment, since battery voltage and temperature are important parameters affecting battery performance and safety, two fixed sampling units can be set in the data sampling module: a voltage sampling unit and a temperature sampling unit, to facilitate the sampling of battery voltage and temperature data. The data sampling unit can quickly obtain the current battery data in real time through these two sampling units, thereby ensuring that the battery data sampling system can quickly determine the current performance state of the battery.

[0045] The battery management unit 106 is connected to the data sampling module and is used to correct the battery data based on the reference voltage to obtain the target battery data.

[0046] The aforementioned reference voltage can refer to an external reference voltage.

[0047] In one alternative embodiment, since extreme temperature environments can affect the internal reference voltage output by the aforementioned internal reference voltage source, resulting in inaccurate battery data, after sampling the battery data and reference voltage using the data sampling module, the sampled battery data can be corrected using the reference voltage as a reference standard.

[0048] Optionally, the system further includes: a first register connected to the temperature sampling channel for storing a reference voltage signal; a second register connected to the voltage sampling channel for storing a battery voltage signal; and a third register connected to the temperature sampling channel for storing a temperature signal.

[0049] The aforementioned registers can be used to store battery data collected by the data sampling module. Generally, one register stores only one battery data. For example, in this embodiment, in order to improve the accuracy of the determined battery data, it is necessary to use an external reference voltage to correct the sampled battery data. Therefore, in actual operation, at least three registers can be set to store the data corresponding to the external reference voltage, battery voltage, and battery temperature.

[0050] In one optional embodiment, when the temperature sampling unit samples the temperature data of the battery, it samples a single external cell. The external reference voltage can be regarded as an independent reference source. Therefore, when sampling the reference voltage of the external reference source, the temperature sampling channel corresponding to the temperature sampling unit can be connected to the external reference source.

[0051] In one optional embodiment, a first register can be set up and connected to the temperature sampling channel in the data sampling module to store the external reference voltage signal value output by the external reference voltage source; a second register can be set up and connected to the voltage sampling channel in the data sampling module to store the voltage signal output by the battery; and a third register can be set up and connected to the temperature sampling channel in the data sampling module to store the temperature signal of the battery data.

[0052] Since the external reference voltage output by the external reference source is a stable voltage value, the signal value stored in its corresponding first register can also be regarded as a stable register value. In other words, the external reference voltage and the first register value obtained based on the external reference source can be regarded as accurate battery data obtained under normal circumstances.

[0053] Optionally, the battery management unit is also used to determine a sampling correction factor based on the quotient of the external reference voltage output by the reference source module and the value of the first register; to determine the target cell voltage based on the product of the correction factor and the value of the second register; and to determine the target module temperature based on the product of the correction factor and the value of the third register.

[0054] The aforementioned sampling correction factor can refer to a parameter used to correct the aforementioned register value, i.e., the acquired voltage data.

[0055] As mentioned above, since the external reference voltage and the first register value obtained based on the external reference source can be regarded as accurate battery data obtained under normal circumstances, and the data ratio relationship between the sampling channels of the same data sampling module is the same, in an optional solution of this embodiment, the quotient of the external reference voltage and the first register value can be used as the above-mentioned sampling correction factor.

[0056] For example, if the current external reference source outputs a reference voltage of V... ref The corresponding value of the first register is A, so the formula for the sampling correction factor a above can be:

[0057] In one optional embodiment, since the battery voltage and temperature data can be directly determined by the internal reference provided by the internal reference source in a moderate temperature environment, the internal reference voltage simultaneously affects the voltage signal value stored in the second register and the temperature signal value stored in the third register. Therefore, the sampling correction factor determined above can simultaneously correct the voltage and temperature data collected by the data acquisition module.

[0058] Specifically, since the data stored in the register is battery data, when correcting the data, the product of the correction factor and the signal value stored in the register can be used as the target data.

[0059] For example, if the voltage signal value stored in the second register is B and the temperature signal value stored in the third register is C, then the target cell voltage V after correcting the voltage data at this time... cell Yes: V cell = a × B, the target module temperature V after correcting the temperature data. temp Yes: V temp = a × C.

[0060] In this embodiment of the invention, the battery data sampling system may include a reference source module, a data sampling module connected to the reference source module and an external battery cell, and a battery management unit connected to the data sampling module. The data sampling module samples the battery voltage and temperature signals of the external battery cell to obtain battery data for the external battery cell, samples the reference voltage signal to obtain an external reference voltage, and the battery management unit corrects the battery data based on the reference voltage to obtain the target battery data. It is noteworthy that this invention can output a stable reference voltage to the data sampling module by connecting a reference source module externally. Then, by utilizing the proportional relationship between the battery data sampled by the data sampling module, the battery data is corrected in the battery management unit without needing to consider the temperature of the battery's environment. This avoids the internal reference source of the sampling module being unable to output a stable internal reference voltage due to extreme temperatures, leading to inaccurate battery data. This achieves the technical effect of improving the accuracy of battery data measurement, thereby solving the technical problem of low measurement accuracy when measuring battery data in high or low temperature environments in related technologies.

[0061] Optionally, the analog-to-digital conversion unit has the same number of bits as the reference source module.

[0062] The aforementioned analog-to-digital conversion bit depth refers to the conversion accuracy of the aforementioned analog-to-digital conversion unit, and the converted result is the signal value stored in the aforementioned register. Since the external reference voltage and the first register value obtained from the external reference source are stable reference values ​​in this embodiment, the numerical accuracy of the external reference source can be determined as the aforementioned analog-to-digital conversion bit depth when setting the aforementioned data accuracy.

[0063] For example, if the current cell voltage is 5V and the analog-to-digital converter has 16 bits, then the voltage signal value stored in the register can be determined to be 327680.

[0064] In one alternative embodiment, if the current ambient temperature of the battery is suitable, the target cell voltage and target module temperature can be determined directly based on the internal reference voltage output by the internal reference source.

[0065] For example, under suitable ambient temperature conditions, if the analog-to-digital converter has 16 bits, the internal reference voltage output by the internal reference source will be V. ref* If the voltage signal value of the second register is B, then the target cell voltage V is at this time. cell yes: Target module temperature V temp yes:

[0066] Optionally, the data sampling module can provide voltage to the reference source module.

[0067] In one optional embodiment, in order to reduce the operating pressure of the battery data sampling system, the battery that needs to be sampled can be used as an external power source to power the data sampling module. After the data sampling module is powered on, it can be further used as a second power source to power the reference source module.

[0068] Figure 2 This is a schematic diagram illustrating the detailed structure of a first data battery sampling system according to an embodiment of the present invention, as shown below. Figure 2 As shown, the dashed rectangle on the left represents the battery, and the three black rectangles within the battery represent multiple battery cells. It should be noted that the number of battery cells is not limited. The dashed rectangle in the middle represents the data sampling module, in which the ADC represents the internal reference source. The data sampling module has voltage sampling channels and temperature sampling channels, with the temperature sampling channel connected to both the external battery cells and the external reference source. The rectangle on the right represents the battery management unit. In this embodiment, after the data sampling module samples the battery's voltage, temperature, and other data, the target data can be further determined in the battery management unit.

[0069] It is important to note that, in Figure 2 In this configuration, once the data sampling module is powered on, it can directly provide voltage to an external reference source. Furthermore, as... Figure 2 As shown by the solid and dashed arrows in the diagram, in one optional embodiment, if the ambient temperature of the battery is moderate, the system can sample only the battery temperature through the temperature sampling channel, as shown by the dashed arrow. Then, the battery management unit can quickly determine the target data based on the voltage, temperature, and internal reference voltage sampled by the data sampling module. If the ambient temperature of the battery is too high or too low, the system can simultaneously sample the battery and external reference source temperatures through the temperature sampling channel, as shown by the dashed arrow. Then, the battery management unit can accurately determine the target data based on the voltage, temperature, and external reference voltage sampled by the data sampling module.

[0070] Optionally, the system also includes: a preset DC chopper module, connected to an external battery cell and a reference source module, for providing voltage to the reference source module.

[0071] In one optional embodiment, in addition to directly using the data sampling module as a second power source to power the reference source module, a preset DC chopper module can be additionally set up. The preset DC chopper is connected to the external battery cell and the reference source module, that is, the battery is used as the aforementioned second power source to power the reference source module, thereby further improving the stability of the external reference voltage output by the external reference source.

[0072] Figure 3 This is a schematic diagram illustrating the detailed structure of a second sampling system according to an embodiment of the present invention. Figure 2 The difference is that a preset DC chopper can be used to establish the connection between the battery and the reference source module, thereby enabling the battery to power the reference source module.

[0073] Optionally, the system also includes: a high-low voltage isolated power supply module, connected to the power supply and the reference source module, for providing voltage to the reference source module based on the low voltage provided by the power supply.

[0074] In one optional embodiment, if the battery that needs to perform data sampling is easily affected by the power supply of other devices, an additional power supply can be set up to power the reference source module. In order to prevent the reference source module from malfunctioning due to low voltage power supply, a high-low voltage isolation power supply module can be connected in series between the power supply and the reference source module.

[0075] Figure 4 This is a schematic diagram illustrating the detailed structure of a second sampling system according to an embodiment of the present invention. Figure 2 and Figure 3 The difference is that an additional power supply can be set up, and a high-low voltage isolated power supply module can be used to establish a connection between the power supply and the reference source module, so that the power supply can supply power to the reference source module.

[0076] Example 2

[0077] According to an embodiment of the present invention, a method for battery data sampling is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here. Optionally, the above method can be executed by the battery data sampling system provided in Embodiment 1, with the specific implementation scheme and application scenarios being the same as those in the above embodiments, and will not be repeated here.

[0078] Figure 5 This is a flowchart illustrating a battery data sampling method according to an embodiment of the present invention, such as... Figure 5 As shown, the method includes the following steps:

[0079] Step S502: Obtain the value of the first register and the external reference voltage output by the external reference source.

[0080] The first register value is used to characterize the reference voltage signal value obtained by sampling an external reference source using the first preset channel.

[0081] Step S504: Obtain the correction factor based on the quotient of the external reference voltage and the first register value.

[0082] Step S506: Determine the target battery data of the external cell based on the product of the correction factor and the second register value, and the product of the correction factor and the third register value.

[0083] The second register value is used to characterize the voltage signal value obtained by sampling the external battery cell using the second preset channel, and the third register value is used to characterize the temperature signal value obtained by sampling the external battery cell using the first preset channel.

[0084] The specific methods are as described in the relevant content of each module in the aforementioned battery data sampling system, and will not be repeated here.

[0085] Optionally, the first preset channel is a temperature sampling channel, and the second preset channel is a voltage sampling channel.

[0086] Optionally, the method further includes: obtaining the numerical precision of an external reference source; and determining the conversion bit depth of the data sampling module based on the numerical precision.

[0087] Optionally, the method further includes: in response to the power-on of the data sampling module, providing a voltage to an external reference source based on the data sampling module.

[0088] Optionally, the method further includes: in response to the presence of a preset DC chopper, controlling an external battery cell to provide voltage to an external reference source based on the preset DC chopper.

[0089] Optionally, the method further includes: in response to the presence of a power supply and a high-low voltage isolation power supply, controlling the power supply to provide voltage to an external reference source based on the high-low voltage isolation power supply.

[0090] Example 3

[0091] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to execute the battery data sampling method of the above-described method embodiments.

[0092] Example 4

[0093] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes the battery data sampling method of the above-described method embodiments.

[0094] Example 5

[0095] According to another aspect of the present invention, a vehicle is also provided, including the battery data sampling system described above.

[0096] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0097] In the above embodiments of the present invention, 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.

[0098] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The system embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection of units or modules may be electrical or other forms.

[0099] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0100] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0101] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0102] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A battery data sampling system, comprising: The system comprises: a reference source module configured to output a reference voltage signal; a data sampling module connected with the reference source module and an external battery cell, configured to sample a battery voltage signal and a temperature signal of the external battery cell to obtain battery data of the external battery cell, and sample the reference voltage signal to obtain an external reference voltage; a battery management unit connected with the data sampling module, configured to correct the battery data based on the reference voltage to obtain target battery data; wherein the data sampling module comprises: a voltage sampling unit connected with the external battery cell through a voltage sampling channel, configured to sample the battery voltage signal output by the external battery cell, wherein each of the external battery cells is connected in parallel with a resistor of the same resistance, and the battery signal output by each of the external battery cells is integrated to obtain battery sampling data; a temperature sampling unit connected with the external battery cell and the reference source module through a temperature sampling channel, configured to sample the temperature signal output by the external battery cell and the reference voltage signal; an internal reference source unit configured to output an internal reference voltage; and an analog-to-digital conversion unit connected with the voltage sampling unit, the temperature sampling unit and the internal reference source unit, configured to convert the battery voltage signal and the temperature signal into the battery data based on the internal reference voltage. The battery data sampling system further comprises: a first register configured to store the reference voltage signal; a second register configured to store the battery voltage signal; and a third register configured to store the temperature signal.

2. The system of claim 1, wherein: the first register is connected with the temperature sampling channel; the second register is connected with the voltage sampling channel; the third register is connected with the temperature sampling channel.

3. The system of claim 2, wherein, The battery management unit is further configured to determine a sampling correction factor based on a quotient of the external reference voltage output by the reference source module and a value of the first register, determine a target battery cell voltage based on a product of the correction factor and a value of the second register, and determine a target module temperature based on a product of the correction factor and a value of the third register.

4. The system of claim 1, wherein, Analog quantity conversion bits of the analog-to-digital conversion unit are the same as numerical accuracy of the reference source module.

5. The system of claim 1, wherein, The data sampling module provides voltage for the reference source module.

6. The system of claim 1, wherein, The system further comprises: a preset DC chopper module connected with the external battery cell and the reference source module, configured to provide voltage for the reference source module.

7. The system of claim 1, wherein, The system further comprises: a high-low voltage isolation power supply module connected with a power supply and the reference source module, configured to provide voltage for the reference source module based on low voltage provided by the power supply.

8. A battery data sampling method based on the battery data sampling system of claim 1, characterized by, The method comprises: obtaining a first register value and an external reference voltage output by an external reference source, wherein the first register value is used to represent a reference voltage signal value obtained by sampling the external reference source through a first preset channel; obtaining a correction factor based on a quotient of the external reference voltage and the first register value; and determine target battery data of the external battery cell based on a product of the correction factor and a second register value, a product of the correction factor and a third register value, wherein the second register value is used to represent a voltage signal value obtained by sampling the external battery cell by using a second preset channel, and the third register value is used to represent a temperature signal value obtained by sampling the external battery cell by using the first preset channel.

9. A vehicle characterized by comprising: comprising: the system of any one of claims 1 to 7.

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