Electric quantity estimation device, electric quantity estimation system, electric quantity estimation method and vehicle

Abstract

The invention provides an electric quantity estimation device, an electric quantity estimation system, an electric quantity estimation method and a vehicle, and the electric quantity estimation device comprises a receiving unit which is configured to receive a current characteristic value collected by a current collection unit through at least one collection channel in a plurality of collection channels, the current characteristic value comprises a current value and / or a current analog quantity value; and the processing unit is in communication connection with the receiving unit and is configured to estimate the electric quantity of the battery according to the received current characteristic value.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a power estimation device, a power estimation system, a power estimation method, and a vehicle. Background Art

[0002] Batteries (especially power batteries) are core components of devices such as electric vehicles, electric engineering machinery, and energy storage stations. They are typically required to deliver power continuously, stably, and safely. The battery's state of charge (SOC) characterizes the remaining charge in the battery and is a key indicator of battery performance and usage. High-precision SOC estimation is crucial for controlling and utilizing batteries. For example, high-precision SOC estimation helps improve the accuracy and efficiency of battery management, thereby extending battery life and increasing range. Summary of the Invention

[0003] A brief overview of the present disclosure is provided below to provide a basic understanding of some aspects of the present disclosure. However, it should be understood that this overview is not an exhaustive overview of the present disclosure. It is not intended to identify key or important parts of the present disclosure, nor is it intended to limit the scope of the present disclosure. Its purpose is simply to present certain concepts of the present disclosure in a simplified form as a prelude to the more detailed description that will be given later.

[0004] One of the objectives of the present disclosure is to provide a power estimation device, a power estimation system, a power estimation method and a vehicle.

[0005] According to a first aspect of the present disclosure, a power estimation device is provided, the power estimation device comprising:

[0006] a receiving unit configured to receive a current characteristic value collected by the current collection unit through at least one collection channel among the multiple collection channels, wherein the current characteristic value includes a current value and / or a current analog value;

[0007] The processing unit is communicatively connected to the receiving unit and is configured to estimate the battery power according to the received current characteristic value.

[0008] In some embodiments, the processing unit is configured to estimate the battery power using the ampere-hour integration method based on the current value, wherein the ampere-hour integration method formula is Qh=∫I*dt, where Qh represents the battery power, I represents the current value, and dt represents the time step.

[0009] In some embodiments, the processing unit is configured to convert the current analog value received by the receiving unit into a current value.

[0010] In some embodiments, the processing unit is configured to perform the estimation with a time step of 0.1-5 ms or 5-10 ms.

[0011] In some embodiments, the current acquisition unit is configured to acquire a current characteristic value of the battery branch through the at least one acquisition channel and send the current characteristic value to the receiving unit.

[0012] In some embodiments, the current collection unit includes at least one of the following:

[0013] a first shunt current sensor, wherein the first shunt current sensor is configured to collect current analog values ​​of the battery branch through one or more collection channels of the plurality of collection channels, and send the collected current analog values ​​to the receiving unit;

[0014] a first Hall sensor, wherein the first Hall sensor is configured to collect current analog values ​​of the battery branch through one or more collection channels and send the collected current analog values ​​to the receiving unit;

[0015] a second shunt sensor, wherein the second shunt sensor is configured to collect analog current values ​​of the battery branch through one or more collection channels, convert the collected analog current values ​​into current values, and send the converted current values ​​to the receiving unit in the form of a controller area network (CAN) signal;

[0016] A second Hall sensor, wherein the second Hall sensor is configured to collect current analog values ​​of the battery branch through one or more collection channels, convert the collected current analog values ​​into current values, and send the converted current values ​​to the receiving unit in the form of a controller area network (CAN) signal.

[0017] In some embodiments, the power estimation device further includes a power supply unit, and the power supply unit is configured to supply power to the current acquisition unit.

[0018] In some embodiments, the processing unit is configured to send the battery power to a battery management system (BMS), wherein the BMS is configured to determine a battery state of charge (SOC) according to the battery power.

[0019] In some embodiments, the BMS is configured to determine the battery state of charge (SOC) at a current moment based on the following formula:

[0020] Among them, Qh is the battery capacity, SOC pre is the SOC of the previous moment, C normal is the rated capacity of the battery.

[0021] In some embodiments, the receiving unit includes a CAN transceiver, and the processing unit is configured to send the battery power to the BMS via the CAN transceiver.

[0022] According to a second aspect of the present disclosure, a power estimation system is provided, the power estimation system comprising:

[0023] a current acquisition unit, configured to acquire a current characteristic value of the battery branch through at least one acquisition channel among a plurality of acquisition channels, wherein the current characteristic value includes a current value and / or a current analog value;

[0024] The power estimation device comprises:

[0025] a receiving unit, configured to receive the current characteristic value collected by the current collection unit;

[0026] The processing unit is communicatively connected to the receiving unit and is configured to estimate the battery power according to the received current characteristic value.

[0027] In some embodiments, the power estimation system further includes:

[0028] A battery management system BMS is communicatively connected to the processing unit, and the BMS is configured to determine a battery state of charge (SOC) according to the battery power.

[0029] In some embodiments, the power estimation system includes a communication unit, wherein the communication unit is configured to:

[0030] receiving an upgrade request for a target application;

[0031] Determine a partition where the currently running target application is located, wherein the partition includes a first partition and a second partition;

[0032] In response to the currently running target application being located in the first partition, upgrading the target application in the second partition;

[0033] In response to the currently running target application being located in the second partition, the target application in the first partition is upgraded.

[0034] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned power estimation device or the above-mentioned power estimation system.

[0035] According to a fourth aspect of the present disclosure, a method for estimating power is provided, the method comprising:

[0036] Receiving a current characteristic value collected through at least one collection channel among a plurality of collection channels, wherein the current characteristic value includes a current value and / or a current analog value;

[0037] The battery capacity is estimated based on the received current characteristic value.

[0038] In some embodiments, the power estimation method is executed by the power estimation device or the power estimation system as described above.

[0039] Other features and advantages of the present disclosure will become more apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0041] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0042] Figure 1 A schematic structural diagram of a power estimation device according to an exemplary embodiment of the present disclosure is shown;

[0043] Figure 2 A schematic structural diagram of a power estimation system according to an exemplary embodiment of the present disclosure is shown;

[0044] Figure 3 shows a schematic structural diagram of a first shunt sensor according to an exemplary embodiment of the present disclosure;

[0045] Figure 4 shows a schematic structural diagram of a second shunt sensor according to an exemplary embodiment of the present disclosure;

[0046] Figure 5 shows a schematic structural diagram of a first Hall sensor according to an exemplary embodiment of the present disclosure;

[0047] Figure 6 shows a schematic structural diagram of a second Hall sensor according to an exemplary embodiment of the present disclosure;

[0048] Figure 7 A schematic diagram of a remote upgrade application process according to an exemplary embodiment of the present disclosure is shown;

[0049] Figure 8 A schematic structural diagram of a communication unit according to an exemplary embodiment of the present disclosure is shown;

[0050] Figure 9A flow chart of a method for estimating power consumption according to an exemplary embodiment of the present disclosure is shown.

[0051] Note that in the embodiments described below, the same reference numerals are sometimes used in common across different drawings to denote the same parts or parts having the same functions, and their repeated descriptions are omitted. In this specification, similar reference numerals and letters are used to denote similar items. Therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0052] To facilitate understanding, the positions, sizes, and ranges of various structures shown in the drawings and the like may not always represent actual positions, sizes, and ranges. Therefore, the disclosed invention is not limited to the positions, sizes, and ranges disclosed in the drawings and the like. Furthermore, the drawings are not necessarily drawn to scale, and some features may be exaggerated to illustrate details of specific components. DETAILED DESCRIPTION

[0053] Various exemplary embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0054] The following description of at least one exemplary embodiment is merely illustrative and is not intended to limit the present disclosure, its application, or use. In other words, the structures and methods herein are presented in an exemplary manner to illustrate various embodiments of the structures and methods of the present disclosure. However, those skilled in the art will appreciate that these are merely exemplary of the disclosure that may be implemented, and are not exhaustive. Furthermore, the drawings are not necessarily drawn to scale, and some features may be exaggerated to illustrate details of specific components.

[0055] Technologies, methods and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods and equipment should be considered part of the authorization specification.

[0056] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0057] Battery state of charge (SOC) is a key indicator of battery performance and usage. High-precision SOC estimation can effectively reduce battery costs while facilitating precise control to extend battery life and improve safety. Therefore, SOC estimation accuracy is crucial.

[0058] In some examples, Kalman filtering and related neural network algorithms can be used to estimate SOC. Alternatively, in some examples, a voltage method can be used to estimate SOC. Some batteries (such as lithium iron phosphate batteries) have voltage plateaus. For example, when the battery's SOC is between 30% and 90%, the voltage change is relatively small and difficult to identify and measure, resulting in a significant difference between the SOC estimated by the voltage method and the actual situation.

[0059] In some examples, the SOC can be estimated using the ampere-hour integration method, or the ampere-hour integration plus terminal voltage correction method. In some cases, some computing devices have poor computing power and large computing requirements, resulting in a long operation execution cycle. As time accumulates, the error of the estimated SOC based on the ampere-hour integration method will gradually increase, and the SOC estimation accuracy is not high. In other cases, the sampling harness is too long and the current sampling accuracy is low, which may cause the sampled current value to differ greatly from the actual situation, thereby causing the estimated SOC to differ greatly from the actual situation. In addition, for large-scale energy storage, electric engineering machinery and other devices with battery packs with large power, multiple branches are usually required in parallel to increase the total power of the battery pack. When there are fewer current acquisition channels, it is difficult to accurately control and monitor the entire battery pack system.

[0060] In order to solve the above problems, the present disclosure proposes a power estimation device, which can estimate the battery power based on the current characteristic value collected by the current acquisition unit through at least one of multiple acquisition channels, so that the corresponding acquisition channel can be more flexibly selected as needed to collect the current characteristic value of the battery branch in the battery pack, so as to more accurately estimate the battery power.

[0061] like Figure 1 As shown, in an exemplary embodiment of the present disclosure, the power estimation device 100 may include a receiving unit 110 and a processing unit 120 , wherein the receiving unit 110 is communicatively connected to the processing unit 120 .

[0062] like Figure 1 and Figure 2 As shown, the receiving unit 110 may be configured to receive a current characteristic value collected by the battery collection unit 20 through at least one collection channel among a plurality of collection channels, wherein the current characteristic value may include a current value and / or a current analog value.

[0063] In some embodiments, at least one acquisition channel can be connected to the current acquisition unit 20, wherein the current acquisition unit 20 can be configured to acquire current characteristic values ​​of the battery branch and transmit them to the receiving unit 110 via the at least one acquisition channel. In some embodiments, the current acquisition unit 20 can be configured to acquire current analog values ​​of the battery branches in the battery pack 11. The current analog value can be used to represent the current value of the battery branch. For example, the current analog value can be a voltage value, wherein the current analog value can be converted into a current value according to a corresponding conversion relationship. In some embodiments, the processing unit 120 can be configured to convert the current analog value into a current value. Alternatively, in other embodiments, the current acquisition unit 20 can be configured to acquire current values ​​of the battery branches in the battery pack 11.

[0064] The current characteristic value collected by the current collection unit 20 can be a positive number or a negative number. The positive or negative value of the current characteristic value is used to indicate the direction of the current. In a specific example, the current characteristic value is a positive number, indicating that the current direction of the corresponding battery branch in the battery pack 11 is different from the preset positive current direction (such as Figures 3 to 6 The positive direction of the current shown is consistent with 191); the current characteristic value is a negative number, indicating that the current direction of the corresponding battery branch in the battery pack 11 is opposite to the preset positive direction of the current.

[0065] like Figure 1 and Figure 2 As shown, in some embodiments, the power estimation device 100 may further include a power supply unit 130, wherein the power supply unit 130 may be configured to supply power to the current acquisition unit 20 so that the current acquisition unit 20 can be powered on and operate. In a specific example, the power supply unit 130 may be configured to output 5V, 12V, or 24V DC power to the current acquisition unit 20.

[0066] In some embodiments, at least two of the multiple acquisition channels have different ranges, so that an acquisition channel with an appropriate range can be selected from the multiple acquisition channels for acquisition, thereby improving the flexibility of acquisition, meeting the current acquisition of battery branches in battery packs 11 with different power levels or different voltage levels, and improving the flexibility of the power estimation device 100.

[0067] In some embodiments, the current collection unit 20 may be configured to collect the charge and discharge current in real time during the charge and discharge process of the battery cells in the battery pack 11 .

[0068] In some embodiments, the current acquisition unit 20 can support multiple acquisition methods, such as a resistance shunt-based acquisition method and a Hall effect-based acquisition method. In some embodiments, the current acquisition unit 20 can include at least one of a first shunt sensor, a first Hall effect sensor, a second shunt sensor, and a second Hall effect sensor.

[0069] In some embodiments, the first shunt current sensor may be configured to collect current analog values ​​of the battery branch through one or more collection channels among the multiple collection channels, and send the collected current analog values ​​to the receiving unit 110 .

[0070] like Figure 2 and Figure 3 As shown, the first shunt current sensor may include a first connection point 201 , a first base 202 , a second connection point 203 , a first resistor 204 and a first acquisition line 205 .

[0071] The battery wiring harness 19 of the battery branch can be fixedly connected to the first connection point 201 to be tightly and securely fixed to the first base 202. The first acquisition line 205 can be fixedly connected to the second connection point 203. The first acquisition line 205 can be configured to acquire a first voltage value U1 (e.g., in millivolts mV) across the first resistor 204 through one or more of a plurality of acquisition channels as an analog current value of the battery branch. In some embodiments, the first acquisition line 205 can be connected to the acquisition harness 16 to transmit the first voltage value U1 to the receiving unit 110 via the acquisition harness 16.

[0072] In some embodiments, the processing unit 120 may be configured to convert the first voltage value U1 into a first current value I1 based on the resistance value R1 of the first resistor 204 received by the receiving unit 110. Specifically, the processing unit 120 may be configured to convert the first voltage value U1 into the first current value I1 according to the formula I1 = U1 / R1. For example, if the resistance value R1 of the first resistor 204 = 0.15 mΩ and the first voltage value U1 = 45 mV, then I1 = 300 A, i.e., the current of the corresponding battery branch in the battery pack 11 is 300 A, and the current direction is consistent with the positive current direction 191.

[0073] In some embodiments, the second shunt sensor can be configured to collect current analog values ​​of the battery branch through one or more collection channels among a plurality of collection channels, convert the collected current analog values ​​into current values, and send the converted current values ​​to the receiving unit 110 in the form of a controller area network (CAN) signal.

[0074] like Figure 2 and Figure 4 As shown, the second shunt sensor may include a third connection point 206 , a second base 207 , a fourth connection point 208 , a second resistor 209 , a second acquisition line 210 , a CAN shunt assembly 211 and a low-voltage connector 212 .

[0075] The battery wiring harness 19 of the battery branch can be fixedly connected to the third connection point 206 to be tightly and securely fixed to the second base 207. The second acquisition line 210 can be fixedly connected to the fourth connection point 208. The second acquisition line 210 can be configured to acquire a second voltage value U2 (e.g., in millivolts mV) across the second resistor through one or more of the multiple acquisition channels as an analog current value of the battery branch.

[0076] The second acquisition line 210 can be connected to a CAN shunt assembly 211. The CAN shunt assembly 211 can be configured to convert the second voltage value U2 into a second current value I2 based on the resistance value R2 of the second resistor. Specifically, the CAN shunt assembly 211 can be configured to convert the second voltage value U2 into the second current value I2 according to the formula I2 = U2 / R2. In some embodiments, the CAN shunt assembly 211 can include a microcontroller (MCU), a power management module, and a CAN transceiver.

[0077] The CAN shunt assembly 211 can be connected to the low-voltage connector 212, wherein the low-voltage connector 212 can be configured to send the second current value I2 to the receiving unit 110 in the form of a CAN signal. In some embodiments, the CAN transceiver in the CAN shunt assembly 211 can be configured to send the second current value I2 to the receiving unit 110 in the power estimation device 100 in the form of a CAN signal via a CAN channel of the low-voltage connector 212. In some embodiments, the low-voltage connector 212 can be connected to the CAN harness 18, wherein the low-voltage connector 212 can be configured to send the second current value I2 to the receiving unit 110 in the form of a CAN signal via the CAN harness 18.

[0078] In some embodiments, the second acquisition line 210 can also be used to acquire a temperature value, wherein the temperature value can be transmitted to the receiving unit 110 via the CAN harness 18 so that the power estimation device 100 can monitor the temperature in the second shunt sensor.

[0079] In some embodiments, the low voltage connector 212 may include a CAN H pin, a CAN L pin, a low voltage power supply positive pin (e.g., 12V+ or 24V+) for receiving a power supply current (e.g., 12V or 24V current) and a low voltage power supply negative pin (e.g., 12V- or 24V-), and a KL15 pin for receiving a key power KL15.

[0080] In some embodiments, the power supply unit 130 may be configured to supply power to the second shunt sensor through the low voltage power supply positive pin, the low voltage power supply negative pin, and the KL15 pin, so that the second shunt sensor is powered on and operates.

[0081] In some embodiments, the first resistor 204 and / or the second resistor 209 may be temperature-dependent high-precision resistors to obtain more accurate resistance values ​​and improve the accuracy of the current value of the battery branch subsequently calculated using the voltage value and the resistance value.

[0082] In some embodiments, the first Hall sensor may be configured to collect current analog values ​​of the battery branch through one or more collection channels among the multiple collection channels, and send the collected current analog values ​​to the receiving unit 110 .

[0083] like Figure 2 and Figure 5 As shown, the first Hall sensor may include a first magnetic core 213 , a Hall low-voltage connector 214 and a Hall assembly 215 .

[0084] The battery harness 19 of the battery branch can pass through the first magnetic core 213, for example, along the Figure 5 The positive current 191 shown passes through the first magnetic core 213, generating a magnetic field of a specified induction strength. The Hall assembly 215 may include a Hall element. When a magnetic field acts on the Hall element, a potential difference is generated across the element. Furthermore, the Hall assembly 215 may include functional circuits such as an amplifier circuit and a voltage regulator circuit.

[0085] The Hall low-voltage connector 214 includes pins related to acquisition channels, a low-voltage power supply positive pin (eg, 5V+) for receiving a power supply current (eg, 5V current), and a low-voltage power supply negative pin (eg, 5V-).

[0086] In some embodiments, for example, a collection circuit or component in Hall assembly 215, or a collection circuit or component independent of Hall assembly 215, can collect the potential difference across the Hall element through one or more of the multiple collection channels to generate a third voltage value U3, which serves as an analog value of the battery branch current and is transmitted to Hall low-voltage connector 214. In one specific example, the third voltage value U3 collected through one or more of the multiple collection channels is greater than or equal to 0V and less than or equal to 5V.

[0087] The Hall low-voltage connector 214 may be connected to the acquisition harness 16 to send the third voltage value U3 to the receiving unit 110 .

[0088] In some embodiments, the processing unit 120 may be configured to convert the third voltage value U3 received by the receiving unit 110 into a third current value I3. In some embodiments, the processing unit 120 may be configured to convert the third voltage value U3 received by the receiving unit 110 into a third current value I3 based on the formula The third voltage value U3 is converted into a third current value, where U0 is an offset voltage. In a specific example, U0 can be 2500mV; UC is a reference voltage range for analog quantity acquisition. In a specific example, the reference voltage range UC can be an acquisition range pre-designed for the corresponding acquisition channel. For example, UC can be 5000mV; UB is a sampling voltage range for analog quantity acquisition. The sampling voltage range UB can be the analog quantity range actually acquired through the corresponding acquisition channel. For example, if the acquired third voltage value U3 is greater than or equal to 0V and less than or equal to 5V, UB can be 5000mV; G is the sensitivity (also known as accuracy) of the corresponding acquisition channel. In a specific example, G can be 26.7mV / A or 2.7mv / A.

[0089] In some embodiments, the first Hall sensor can be a single-range Hall sensor, wherein the potential difference across the Hall element can be collected through one of multiple collection channels, for example, by an acquisition circuit or component in the Hall assembly 215, or by an acquisition circuit or component independently of the Hall assembly 215, to generate a third voltage value U3. The acquisition channel can be used to collect currents in the range of -300A to +300A or -500A to +500A.

[0090] In other embodiments, the first Hall sensor can be a dual-range Hall sensor, in which the potential difference across the Hall element can be collected, for example, by an acquisition circuit or component in the Hall assembly 215, or by an acquisition circuit or component independently provided from the Hall assembly 215, through two acquisition channels with different ranges among a plurality of acquisition channels to generate a third voltage value U3, wherein the acquisition channel with a smaller range of the two acquisition channels can be used to collect currents from -75A to +75A, for example, and the acquisition channel with a larger range can be used to collect currents from -75A to -500A, +75A to +500A, or even collect currents above ±1000A. The processing unit 120 can be configured to convert the third voltage values ​​U31 and U32 received by the receiving unit 110 into third current values ​​I31 and I32, respectively. In some embodiments, the ... The third voltage value U31 collected by the first acquisition channel is converted into a third current value I31, wherein G1 is the sensitivity corresponding to the first acquisition channel; the processing unit 120 can be configured to be based on the formula The third voltage value U32 collected through the second acquisition channel is converted into a third current value I32, where G2 is the sensitivity corresponding to the second acquisition channel. In a specific example, the first acquisition channel has a smaller range, and the corresponding G1 is 26.7mV / A; the second acquisition channel has a larger range, and the corresponding G2 is 2.7mV / A.

[0091] In some embodiments, the processing unit 120 may be configured to determine a target current value I33 based on the third current values ​​I31 and I32 to serve as the current value of the corresponding battery branch. In a specific example, the processing unit 120 may be configured to determine the third current value of I31 and I32 that does not exceed the range of the corresponding acquisition channel as the target current value I33. For example, the first acquisition channel is used to acquire currents from -75A to +75A, the second acquisition channel is used to acquire currents from -750A to -75A and +75A to 750A, the sensitivity G1 of the first acquisition channel is 26.7mV / A, the sensitivity G2 of the second acquisition channel is 2.7mV / A, the offset voltage U0 is 2500mV, the reference voltage range UC of analog acquisition is 5000mV, the sampling voltage range UB of analog acquisition is 5000mV, the third voltage value U31 acquired based on the first acquisition channel is 4700mV, and the third voltage value U32 acquired based on the second acquisition channel is 4000mV, then based on the formula The current value I31≈82.4A can be obtained based on the formula A current value of I32≈555.6A can be obtained. Since the obtained current value I31 is not within the range of the first acquisition channel, while the current value I32 is within the range of the second acquisition channel, the current value I32 obtained based on the second acquisition channel is more accurate and reliable, while the current value I31 obtained based on the first acquisition channel is less accurate and less reliable. Therefore, the target current value I33=I32 can be determined. In some embodiments, when both the third current values ​​I31 and I32 are within the range of the corresponding acquisition channel, the processing unit 120 can be configured to determine I31 or I32 as the target current value I33, or the processing unit 120 can be configured to determine the average of I31 and I32 as the target current value I33.

[0092] In some embodiments, the second Hall sensor can be configured to collect current analog values ​​of the battery branch through one or more collection channels among a plurality of collection channels, convert the collected current analog values ​​into current values, and send the converted current values ​​to the receiving unit 110 in the form of a CAN signal.

[0093] like Figure 2 and Figure 6 As shown, the second Hall sensor may include a second magnetic core 216 , a CAN low voltage connector 217 and a CAN Hall assembly 218 .

[0094] The battery harness 19 of the battery branch can pass through the second magnetic core 216, for example, along Figure 6The positive direction of the current 191 shown passes through the second magnetic core 216 to generate a magnetic field of a specified induction strength. The CAN Hall assembly 218 may include a Hall element. When a magnetic field acts on the Hall element, a potential difference is generated across the Hall element.

[0095] In some embodiments, the potential difference across the Hall element can be collected through one or more of the multiple collection channels, for example, by an acquisition circuit or component in the CAN Hall assembly 218, or by an acquisition circuit or component independently of the CAN Hall assembly 218, to generate a fourth voltage value U4 as an analog current value of the battery branch.

[0096] The CAN Hall assembly 218 may be configured to convert the fourth voltage value U4 into a fourth current value I4. In a specific example, the CAN Hall assembly 218 may be configured based on the formula The fourth voltage value U4 is converted into a fourth current value I4, where G represents the sensitivity of the corresponding acquisition channel. CAN Hall assembly 218 may include a microcontroller (MCU), a power management module, and a CAN transceiver. In some embodiments, CAN Hall assembly 218 may also include functional circuits such as an amplifier circuit and a voltage regulator circuit.

[0097] The CAN Hall assembly 218 can be connected to the CAN low-voltage connector 217, wherein the CAN low-voltage connector 217 can be configured to transmit the fourth current value I4 to the receiving unit 110 in the form of a CAN signal. In some embodiments, the CAN transceiver in the CAN Hall assembly 218 can be configured to transmit the fourth current value I4 to the receiving unit 110 in the form of a CAN signal via a CAN channel of the CAN low-voltage connector 217. In some embodiments, the CAN low-voltage connector 217 can be connected to the CAN wiring harness 18, wherein the CAN low-voltage connector 217 can be configured to transmit the fourth current value I4 to the receiving unit 110 in the form of a CAN signal via the CAN wiring harness 18.

[0098] In some embodiments, the CAN low-voltage connector 217 can include a CAN H pin, a CAN L pin, a low-voltage power supply positive pin (e.g., 5V+) for receiving a power supply current (e.g., 5V current) and a low-voltage power supply negative pin (e.g., 5V-), and a KL15 pin for receiving a key power KL15.

[0099] In some embodiments, the second Hall sensor may be a 5V powered sensor, wherein the power supply unit 130 may be configured to output 5V DC power to the second Hall sensor to power the second Hall sensor. In some embodiments, the power supply unit 130 may be configured to supply power to the second Hall sensor via the low voltage power supply positive pin, the low voltage power supply negative pin, and the KL15 pin, so that the second Hall sensor is powered on and operates.

[0100] The first shunt sensor and the first Hall sensor can collect current analog values ​​through corresponding acquisition channels and transmit the current analog values ​​through the acquisition harness 16. The processing unit 120 then converts the current analog values ​​without the need to convert the current analog values ​​inside the sensor, thereby enabling faster acquisition and improving acquisition efficiency.

[0101] The second shunt sensor and the second Hall sensor can convert the current analog quantity into a current value after collecting the current analog quantity through the corresponding acquisition channel, and transmit the current value through the CAN harness 18 without the need to convert the current analog quantity value through the processing unit 120, thereby dispersing the pressure on the processing unit 120, reducing the possibility of failure of the processing unit 120, and helping to improve the reliability of the power estimation device 100.

[0102] In some embodiments, the receiving unit 110 may receive a current characteristic value collected by the current collection unit 20 via a target collection channel among the multiple collection channels, wherein the target collection channel may be determined from the multiple collection channels based on preset conditions. The preset conditions may include at least one of a preset collection accuracy condition, the charge level and voltage level of the battery pack 11, and the number of battery branches included in the battery pack 11.

[0103] In some embodiments, a sensor that matches the charge level and / or voltage level of the battery pack 11 can be selected based on the charge level and / or voltage level of the battery pack 11, and a target acquisition channel can be determined from multiple acquisition channels based on the selected sensor.

[0104] In a specific example, a sensor that matches the charge level and / or voltage level of the battery pack 11 may be selected from the first shunt sensor, the second shunt sensor, the first Hall sensor, and the second Hall sensor.

[0105] The number of selected sensors (i.e., the number of sensors included in the battery acquisition unit) may be determined based on the number of battery branches included in the battery pack 11. In some embodiments, when the battery acquisition unit is configured to acquire current characteristic values ​​of some battery branches in the battery pack 11, the number of selected sensors may be less than the number of battery branches included in the battery pack 11, wherein one sensor may be used to acquire the current characteristic value of one battery branch. In other embodiments, when the battery acquisition unit is configured to acquire current characteristic values ​​of each battery branch in the battery pack 11, the number of selected sensors may be consistent with the number of battery branches included in the battery pack 11. In a specific example, the sensors selected based on the charge level and / or voltage level of the battery pack 11 may include one or more of one or more first shunt sensors, one or more second shunt sensors, one or more first Hall sensors, and one or more second Hall sensors. For example, when the battery pack 11 has four battery branches, the battery acquisition unit may include a first shunt sensor, a second shunt sensor, a first Hall sensor, and a second Hall sensor; or, the battery acquisition unit may include four first shunt sensors, four second shunt sensors, four first Hall sensors, or four second Hall sensors; or, the battery acquisition unit may have other forms of sensor combinations.

[0106] In one specific example, a target acquisition channel may be selected from among multiple acquisition channels, and the acquisition channel may be selected from among multiple acquisition channels. Alternatively, the acquisition channel may be selected from among multiple acquisition channels and satisfy a preset acquisition accuracy condition. This improves the accuracy of the current characteristic values ​​of the corresponding battery branches in the battery pack 11 acquired by the battery acquisition unit, thereby improving the accuracy of the subsequent estimated battery power and SOC. In another specific example, the target acquisition channel may be selected from among multiple acquisition channels, and the acquisition channel may be selected from among multiple acquisition channels, and the acquisition channel may satisfy a preset acquisition accuracy condition.

[0107] In this way, the corresponding sensor combination and the corresponding acquisition channel can be flexibly selected to collect the current characteristic values ​​of each battery branch in the battery pack 11, and the power estimation of battery packs 11 with different power levels and / or different voltage levels can be met, thereby improving the flexibility of the power estimation device 100.

[0108] In some embodiments, as Figure 1 As shown, the receiving unit 110 may include a CAN transceiver 111 and / or an analog quantity receiving unit 112 .

[0109] The CAN transceiver 111 can be configured to receive the current value in the form of a CAN signal. In a specific example, the CAN transceiver 111 can be connected to the CAN harness 18, wherein the CAN transceiver 111 can be configured to receive the current value collected by the second shunt sensor and / or the second Hall sensor through the corresponding collection channel via the CAN harness 18.

[0110] In some embodiments, the second shunt sensor, the second Hall current sensor and the power estimation device 100 (eg, the CAN transceiver 111 in the power estimation device 100) can share a CAN network transmission channel (eg, Figure 2 The second CAN transmission line 9 shown in the figure) is used to realize information interaction.

[0111] The CAN transceiver 111 transmits data via the voltage difference generated by two communication lines (eg, two twisted-pair lines CAN H and CAN L), and two 120-ohm terminal resistors may be connected to the loop.

[0112] The analog value receiving unit 112 can be configured to receive analog current values. In a specific example, the analog value receiving unit 112 can be connected to the acquisition harness 16 , wherein the analog value receiving unit 112 can be configured to receive, via the acquisition harness 16 , analog current values ​​collected by the first shunt sensor and / or the first Hall sensor through corresponding acquisition channels. In a specific example, the analog value receiving unit 112 can be configured to receive analog current values ​​through eight analog acquisition channels via the acquisition harness 16 . The first shunt sensor can collect and transmit the analog current value of the corresponding battery branch through the first of the eight analog acquisition channels. The first Hall sensor can collect and transmit the analog current value of the corresponding battery branch through the second and third of the eight analog acquisition channels (the first Hall sensor is a dual-range Hall sensor). Alternatively, the first Hall sensor can collect and transmit the analog current value of the corresponding battery branch through the fourth of the eight analog acquisition channels (the first Hall sensor is a single-range Hall sensor). As needed, a specified number of first Hall sensors and a specified number of first shunt sensors can be used to collect the current analog values ​​of each battery branch in the battery pack 11 through corresponding analog acquisition channels in the 8 analog acquisition channels.

[0113] In some embodiments, the processing unit 120 may be a FS32K144 microcontroller.

[0114] In some embodiments, the processing unit 120 may be configured to send the battery power Qh to the battery management system 4 (BMS 4), so that the battery management system 4 determines the battery state of charge (SOC) according to the battery power Qh. In a specific example, the battery management system 4 may be configured to calculate the battery state of charge (SOC) according to the formula Determine the SOC at the current moment. The unit of SOC can be, for example, %. pre is the SOC of the previous moment, C normal is the rated capacity of the battery. normal It can be provided by the supplier or obtained by using relevant measurement methods. For example, the battery management system 4 can calculate the battery rated capacity by looking up a table based on the battery temperature and charge and discharge current.

[0115] In some embodiments, the processing unit 120 may be configured to send the estimated battery power to the battery management system 4 via the CAN transceiver 111 .

[0116] In some embodiments, the processing unit 120 may be configured to estimate the battery charge using an ampere-hour integration formula based on the current value, where the ampere-hour integration formula is:

[0117] Qh = ∫I * dt, where Qh represents the battery charge, for example, in ampere-hours (A); I represents the current value, for example, in amperes (A); and dt represents the time step, for example, in hours (h). In a specific example, when the value of Qh is greater than 0, Qh can represent the battery discharge capacity. When the value of Qh is less than 0, the absolute value of Qh can represent the battery charge capacity or energy recovery capacity.

[0118] In some embodiments, a battery protection strategy may be formulated based on the estimated SOC, battery output may be controlled, and battery health assessment may be performed to improve the safety and reliability of related devices.

[0119] In some embodiments, the processing unit 120 can be configured to perform an operation of estimating the battery power using the ampere-hour integral formula based on the current value at a preset time step, wherein the longer the preset time step, the lower the accuracy of the estimated battery power. In a specific example, the preset time step can be 0.1 to 5 ms (when describing a numerical range in this form herein, the numerical range includes values ​​at both ends of "~", for example, the preset time step here includes 0.1 ms and 5 ms) or 5 to 10 ms. For example, the preset time step can be 5 ms, so as to improve the accuracy of the battery power estimation by the processing unit 120 while reducing the computing resources occupied.

[0120] In some embodiments, the current acquisition unit 20 may transmit the collected current characteristic values ​​at a preset time period, wherein the shorter the period, the better the real-time current acquisition performance. In a specific example, the preset time period may be 0.1 to 5 ms or 5 to 10 ms, for example, the preset time period may be 5 ms, to improve the real-time performance of the current acquisition unit 20 while reducing the possibility of failure of the current acquisition unit 20 due to frequent operation. In some embodiments, the preset time period for the current acquisition unit 20 to transmit the current characteristic values ​​is no less than the preset time step for the processing unit 120 to perform the estimation. In a specific example, the preset time step for the processing unit 120 to perform the estimation may be consistent with the preset time period for the current acquisition unit 20 to transmit the current characteristic values, for example, both the preset time step and the preset time period are 5 ms, so that the processing unit 120 can fully and timely utilize the current characteristic values ​​transmitted by the current acquisition unit 20 to perform the battery charge estimation, thereby improving the effectiveness of the battery charge estimation.

[0121] According to another aspect of the present disclosure, a power estimation system 200 is provided. Figure 2 As shown, the power estimation system 200 may include a power estimation device 100 and a current acquisition unit 20. The current acquisition unit 20 may be configured to acquire a current characteristic value of a battery branch through at least one acquisition channel among a plurality of acquisition channels, wherein the current characteristic value may include a current value and / or a current analog value.

[0122] like Figure 1 As shown, the power estimation device 100 may include a receiving unit 110 and a processing unit 120, wherein the receiving unit 110 may be communicatively connected with the current acquisition unit 20 and the processing unit 120, the receiving unit 110 may be configured to receive the current characteristic value collected by the current acquisition unit 20, and the processing unit 120 may be configured to estimate the battery power based on the received current characteristic value.

[0123] Some embodiments of the power estimation device 100 and the current acquisition unit 20 can be referred to above and will not be described in detail here.

[0124] In some embodiments, the power estimation system 200 may further include a battery management system 4, wherein the battery management system 4 may be communicatively connected to the processing unit and configured to determine the battery state of charge (SOC) based on the battery power. The battery management system 4 is an indispensable and important component in electric systems such as electric vehicles. It serves as the hub for managing and monitoring power batteries, and is used to manage, maintain, and monitor battery status to prevent overcharging or overdischarging, extend battery life, and ensure normal operation of the battery. Some embodiments of the battery management system 4 can be found above and are not described in detail here.

[0125] like Figure 2 As shown, the interaction between some components in the power estimation system 200 can be achieved through CAN transmission lines (including corresponding CAN H and CAN L). For example, the battery management system 4 can have three CAN channels, namely the first CAN channel 12, the second CAN channel 13 and the third CAN channel 14. Among them, the first CAN channel 12 can be used to interact with the vehicle controller 6 (hereinafter referred to as VCU 6) and the cloud platform 15 via the first CAN transmission line 8 (also known as the vehicle CAN transmission line) to control the normal driving of the vehicle, use the cloud platform 15 to update and upgrade the application, and upload the data of the BMS 4 and the battery pack 11 to the cloud for remote monitoring and fault warning; the second CAN channel 13 can be used to interact with the current acquisition unit 20, the power estimation device 100 and the battery pack 11 via the second CAN transmission line 9 (also known as the internal CAN transmission line) to manage the charging and discharging process of the battery pack 11 and maintain the efficient and safe operation of the battery pack 11; the third CAN channel 14 can be used to interact with the charger 7 via the third CAN transmission line 10 (also known as the charging CAN transmission line) to charge and replenish the battery pack 11 according to the corresponding communication protocol.

[0126] In some embodiments, the power estimation system 200 may further include a communication unit 3. The communication unit 3 may be used for positioning (e.g., vehicle positioning, trajectory query, navigation) and remote application upgrades. In some embodiments, the communication unit 3 may be integrated into the battery management system 4. In some embodiments, the communication unit 3 may be configured to upload battery status data (e.g., battery charge, SOC, temperature, etc.) of the battery pack 11 to the cloud platform 15.

[0127] Taking into account that some components (for example, the battery management system 4) have the need to upgrade applications in order to work better, these applications can be remotely upgraded. In some embodiments, the communication unit 3 can be configured to receive an upgrade request for the target application; determine the partition where the currently running target application is located, wherein the partition includes a first partition and a second partition; in response to the currently running target application being located in the first partition, upgrade the target application in the second partition; in response to the currently running target application being located in the second partition, upgrade the target application in the first partition. Among them, the target application can be an application of the battery management system 4, so the application of the battery management system 4 can be remotely upgraded through the communication unit 3. In some embodiments, the communication unit 3 can also interact with the cloud platform 15 to obtain the latest upgraded version of the target application. The following is combined with Figure 2 and Figure 7The over-the-air (OVA) upgrade process is described in detail. When an application is launched, it can determine whether the application in the first partition (i.e., Side A) or the application in the second partition (i.e., Side B) is valid. For example, validity can be determined based on whether the application in the corresponding partition is the latest version. If the Side A application is valid, the Side A application runs; if the Side B application is valid, the Side B application runs. When an application requires an upgrade, the cloud platform 15 can publish an upgrade package and prompt the application upgrade request. The vehicle (or a component in the vehicle, such as the communication unit 3 described above) can receive the upgrade prompt and determine whether the upgrade conditions are met. If not, the upgrade process exits. If the upgrade conditions are met, the BMS 4 can download the upgrade package. The downloaded upgrade package can then be verified, for example, to determine whether the downloaded upgrade package is the latest or complete. If not, the BMS 4 can re-download the upgrade package. If so, after the upgrade package is successfully downloaded, the running status of the Side A and Side B applications can be determined. Specifically, the currently running application software is determined to be on Side A or Side B. If it is on Side A, the Side B program is updated; if it is on Side B, the Side A program is updated.

[0128] This allows for remote application upgrades without disrupting normal user use. In extreme cases, such as when an application fails to start after an upgrade, the application will be rolled back to the partition where the application was not upgraded, reducing the possibility of the device becoming unusable or even unresponsive.

[0129] In some embodiments, as Figure 2 and Figure 8 As shown, the communication unit 3 may include an IoT SIM card 301 , a communication chip 302 , a level converter 303 , a GNSS antenna 304 , an LTE antenna 305 , a power management chip 306 and a surface mount dual-row pin 307 .

[0130] The IoT SIM card 301 can be used to provide basic communication services such as wireless data, voice, and SMS, and can also be used to provide IoT customers with operational services such as communication connection management and terminal management. The IoT SIM card 301 can be fixed to the SIM card holder 309. In one specific example, the SIM card holder 309 can be a flip-top type.

[0131] In some embodiments, the surface-mounted double-row pins 307 can be used to connect components within the battery management system 4 and components within the communication unit 3 to achieve bidirectional UART communication between the communication unit 3 and the battery management system 4, while also enabling the battery management system 4 to supply power to the communication unit 3.

[0132] The communication chip 302 can meet the space requirements of M2M (Machine to Machine) applications such as automotive, metering, security, routing, wireless POS, etc. In some seemingly private situations, the communication chip 302 can provide 124 pins, including 80 LCC pins on the outer ring and 44 LGA pins on the inner ring.

[0133] The power management chip 306 may be configured to convert the first power supply voltage into a second power supply voltage and supply power to the communication chip 302. For example, the power management chip 306 may convert a 5V power supply into a 3.8V power supply.

[0134] The level converter 303 can be configured to implement conversion between the 3.3V supply voltage of the BMS 4 and the 1.8V output voltage of the communication chip 302 , and to implement bidirectional UART communication between the 4G module and the BMS 4 .

[0135] The GNSS antenna 304 can be used to receive radio signals transmitted by GNSS satellites to obtain necessary navigation positioning information and observation information, and can perform data processing through the communication chip 302 to complete various navigation, positioning and timing tasks.

[0136] The LTE antenna 305 may be used for wireless data transmission.

[0137] In some embodiments, the communication unit 3 can communicate based on the fourth generation mobile communication standard (4G). In some embodiments, the communication unit 3 can be integrated into the battery management system 4.

[0138] In some embodiments, the power estimation system 200 may further include at least one of a VCU 6 , a low-voltage battery 2 , an electric drive system 17 , a cloud platform 15 , a charger 7 , and a battery pack 11 .

[0139] VCU 6 is the core controller of the entire vehicle control. It can control the low-voltage and high-voltage power supply, energy recovery, etc. of the entire vehicle through the CAN / LIN bus or hard line.

[0140] The charger 7 may be configured to recharge the battery pack 11 and interact with the battery management system 4 in real time. The charger 7 may include a DC charger 7 and / or an AC charger 7 .

[0141] The battery pack 11 can be configured to provide a power source for the entire vehicle system. The battery pack 11 can include multiple battery cells, each of which can be connected in series or in parallel to form one or more battery branches. The battery pack 11 can include lithium-ion batteries or other types of batteries, such as lithium iron phosphate batteries, sodium-ion batteries, and solid-state batteries.

[0142] The electric drive system 17 may include a motor and a motor controller. The electric drive system 17 may be configured to invert the DC power of the battery pack 11 into AC power to drive the vehicle or drive related devices.

[0143] The low-voltage battery 2 can be configured to provide low-voltage power to at least one of the VCU 6, the BMS 4, and the current acquisition unit. In a specific example, when the current acquisition unit requires a 12V or 24V power supply voltage from outside the current acquisition unit, the low-voltage battery 2 can provide 12V or 24V to the current acquisition unit.

[0144] The cloud platform 15 can be configured to monitor uploaded battery status data in real time and predict possible future battery failures based on a battery prediction model. In some embodiments, the cloud platform 15 can be configured to manage the battery pack 11 through cloud-based big data throughout its lifecycle, predicting and characterizing the battery's reliability and lifespan using corresponding predictive characterization models. In some embodiments, the cloud platform 15 can be configured to use machine learning algorithms to optimize battery parameters, thereby improving battery performance and safety.

[0145] According to another aspect of the present disclosure, a vehicle is provided, wherein the vehicle may include the power estimation device 100 or the power estimation system 200 as described above.

[0146] The following reference Figure 2 The interactions between vehicle components in some embodiments are described.

[0147] Before the vehicle is started, the low-voltage battery 2 supplies power to the VCU 6, the battery management system 4, and the power estimation device (i.e., maintains a continuous power supply state). When the vehicle key power (KL15) is turned on, the VCU 6, the battery management system 4, and the power estimation device are activated.

[0148] Before power is applied, the battery management system 4 performs an insulation test. At the same time, the voltage of the battery cells in the battery pack, the battery temperature and other status parameters are sent to the battery management system 4 via the internal CAN transmission line. After diagnosis, the battery management system 4 feeds back the self-test status and results to the VCU 6 via the vehicle CAN transmission line.

[0149] VCU 6 will receive status information uploaded by components such as the battery management system 4 and the electric drive system 17. If it is determined that there is no serious fault in the vehicle system, it will send a high-voltage command to the battery management system 4 through the vehicle CAN transmission line. The battery management system 4 will close the main negative relay of the discharge circuit, and then close the pre-charge relay for pre-charging. After the pre-charging is completed, the main positive relay will be closed, and then the pre-charge relay will be disconnected to complete the high-voltage power-up.

[0150] The VCU 6 sends driving and speed commands to the electric drive system 17 to control the vehicle to run according to the driver's intention.

[0151] The power estimation device 100 can output 5V DC to power the second Hall sensor. The second Hall sensor can convert the collected analog value into a current value, and then periodically send it to the power estimation device 100 in the form of a CAN signal with a sending period of, for example, 5ms.

[0152] The power estimation device 100 sends the calculated Qh to the battery management system 4 through the internal CAN transmission line according to the ampere-hour integration formula Qh=∫I*dt. The sending period can be, for example, 100ms, where Qh is the accumulated ampere-hour capacity, Ia is the current value, and dt is the time step (i.e., the software scheduling period), and dt can be, for example, 5ms.

[0153] After receiving Qh, the battery management system 4 uses the formula Calculate the current SOC, unit %, where SOC pre is the SOC of the previous moment, C normal is the rated capacity of the battery.

[0154] In addition to receiving Qh, the battery management system 4 also receives data such as battery temperature, cell voltage, total voltage, etc. After processing by the battery management system 4, key data such as the maximum cell voltage, minimum cell voltage, maximum temperature, minimum temperature, SOC, etc. can be obtained, and then sent to the communication unit via the UART communication interface in the surface-mounted double-row pin in UART communication mode. The communication unit can upload the relevant battery status parameters to the cloud platform.

[0155] When the vehicle needs to be charged, it can be parked in front of the charging station and the key power (KL15) can be disconnected. Then, the charging gun is inserted into the fast charging station at the vehicle end. If the fast charging station is a dual-gun charging station, you can choose to charge with a single gun or dual guns.

[0156] Select a charging mode, such as single- or dual-charger charging mode, on the charging pile instrument control panel and click Start. The A+ signal provided by the charging pile wakes up the battery management system 4, which then performs a handshake interaction with the charging pile. For example, the battery management system 4 and the charging pile status information (such as the maximum allowable charging voltage, current, and the charging pile's output capacity) can be exchanged. If there are no abnormalities, the charging mode can be entered.

[0157] During the charging process, the battery management system 4 can interact with the charging pile in real time to diagnose whether any abnormality occurs, and can promptly control the exit from the charging mode when an abnormality occurs.

[0158] According to another aspect of the present disclosure, a method for estimating power is provided. Figure 9 As shown, the power estimation method may include:

[0159] Step S910, receiving a current characteristic value collected through at least one of a plurality of collection channels, wherein the current characteristic value includes a current value and / or a current analog value;

[0160] Step S920: Estimate the battery capacity according to the received current characteristic value.

[0161] In some embodiments, the power estimation method may be executed based on the power estimation apparatus 100 or the power estimation system 200 described above.

[0162] According to some embodiments of the present disclosure, the current acquisition channel is expanded to meet the current acquisition needs of battery pack systems with different power levels or voltage levels, thereby improving the adaptability and flexibility of the solution. According to some embodiments of the present disclosure, the high-precision current acquired by the current acquisition unit and the processing unit with high computing power are used to improve the power battery estimation accuracy, and the power battery status can be more accurately monitored and the battery status can be adjusted in time, thereby improving the safety of the battery and extending the battery life. According to some embodiments of the present disclosure, the battery management system can be integrated with a 4G communication unit to realize functions such as remote program upgrades, full life cycle battery monitoring, and early warning, while reducing costs.

[0163] The words "left," "right," "front," "back," "top," "bottom," "up," "down," "high," "low," and the like, if any, in the specification and claims, are used for descriptive purposes and are not necessarily intended to describe invariant relative positions. It should be understood that the words so used are interchangeable under appropriate circumstances such that the embodiments of the present disclosure described herein, for example, are capable of operation in other orientations than those shown or otherwise described herein. For example, when the device in the figures is turned over, features previously described as "above" other features could now be described as "below" the other features. The device can also be otherwise oriented (rotated 90 degrees or in other orientations) and relative spatial relationships will be interpreted accordingly.

[0164] In the specification and claims, when an element is referred to as being "on," "attached," "connected," "coupled," or "in contact with," etc., another element, the element may be directly on, directly attached, directly connected, directly coupled, or directly in contact with the other element, or one or more intervening elements may be present. In contrast, when an element is referred to as being "directly" "on," "directly attached," "directly connected," "directly coupled," or "in direct contact with" another element, there will be no intervening elements. In the specification and claims, when a feature is arranged "adjacent" to another feature, it may mean that the feature has a portion that overlaps with the adjacent feature or a portion that is located above or below the adjacent feature.

[0165] As used herein, the word "exemplary" means "serving as an example, instance, or illustration," rather than as a "model" to be precisely copied. Any implementation described as exemplary is not necessarily to be construed as preferred or advantageous over other implementations. Furthermore, this disclosure is not to be bound by any expressed or implied theory presented in the technical field, background, summary, or detailed description.

[0166] As used herein, the term "substantially" is intended to encompass any minor variations due to design or manufacturing imperfections, device or component tolerances, environmental influences, and / or other factors. The term "substantially" also allows for deviations from a perfect or ideal condition due to parasitic effects, noise, and other practical considerations that may be present in actual implementations.

[0167] Additionally, terms such as "first," "second," and the like may also be used herein for reference purposes only and are not intended to be limiting. For example, the terms "first," "second," and other numerical terms referring to structures or elements do not imply a sequence or order unless the context clearly indicates otherwise.

[0168] It should also be understood that when the term “include / comprises” is used in this document, it indicates the presence of the specified features, integers, steps, operations, units and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, units and / or components and / or their combinations.

[0169] In this disclosure, the term "provide" is used in a broad sense to cover all ways of obtaining an object, and thus "providing an object" includes but is not limited to "purchasing", "preparing / manufacturing", "arranging / setting up", "installing / assembling", and / or "ordering" an object, etc.

[0170] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0171] Those skilled in the art will appreciate that the boundaries between the above-mentioned operations are merely illustrative. Multiple operations can be combined into a single operation, a single operation can be distributed among additional operations, and operations can be performed at least partially overlapping in time. Moreover, alternative embodiments can include multiple instances of a particular operation, and the order of operations can be changed in various other embodiments. However, other modifications, variations, and replacements are also possible. Aspects and elements of all embodiments disclosed above can be combined in any manner and / or in combination with aspects or elements of other embodiments to provide multiple additional embodiments. Therefore, this specification and the accompanying drawings should be regarded as illustrative, not restrictive.

[0172] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art will appreciate that the above examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. The various embodiments disclosed herein may be combined in any manner without departing from the spirit and scope of the present disclosure. Those skilled in the art will also appreciate that various modifications may be made to the embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A power estimation device, characterized in that: The power estimation device comprises: A receiving unit, configured to receive a current characteristic value collected by the current collection unit through at least one collection channel among the multiple collection channels, wherein the current characteristic value includes a current value and / or a current analog value; The processing unit is communicatively connected to the receiving unit and is configured to estimate the battery power according to the received current characteristic value.

2. The power estimation device according to claim 1, characterized in that: The processing unit is configured to estimate the battery power by using an ampere-hour integration method according to the current value, wherein the formula of the ampere-hour integration method is Qh=∫I*dt, wherein Qh represents the battery power, I represents the current value, and dt represents the time step.

3. The power estimation device according to claim 2, characterized in that: The processing unit is configured to convert the current analog value received by the receiving unit into a current value.

4. The power estimation device according to claim 2, characterized in that: The processing unit is configured to perform the estimation with a time step of 0.1-5 ms or 5-10 ms.

5. The power estimation device according to any one of claims 1 to 4, characterized in that: The current acquisition unit is configured to acquire a current characteristic value of the battery branch through the at least one acquisition channel and send the current characteristic value to the receiving unit.

6. The power estimation device according to any one of claims 5, characterized in that: The current collection unit includes at least one of the following: A first shunt current sensor, wherein the first shunt current sensor is configured to collect current analog values ​​of the battery branch through one or more collection channels of the multiple collection channels, and send the collected current analog values ​​to the receiving unit; A first Hall sensor, wherein the first Hall sensor is configured to collect current analog values ​​of the battery branch through one or more collection channels, and send the collected current analog values ​​to the receiving unit; a second shunt sensor, wherein the second shunt sensor is configured to collect current analog values ​​of the battery branch through one or more collection channels, convert the collected current analog values ​​into current values, and send the converted current values ​​to the receiving unit in the form of a controller area network (CAN) signal; A second Hall sensor, wherein the second Hall sensor is configured to collect the current analog value of the battery branch through one or more collection channels, convert the collected current analog value into a current value, and send the converted current value to the receiving unit in the form of a controller area network (CAN) signal.

7. The power estimation device according to claim 5, characterized in that: The power estimation device further includes a power supply unit, and the power supply unit is configured to supply power to the current acquisition unit.

8. The power estimation device according to claim 1, characterized in that: The processing unit is configured to send the battery power to a battery management system BMS, wherein the BMS is configured to determine a battery state of charge (SOC) according to the battery power.

9. The power estimation device according to claim 8, characterized in that: The BMS is configured to determine the battery state of charge (SOC) at the current moment based on the following formula: Wherein, Qh is the battery capacity, SOC pre is the SOC of the previous moment, C normal is the rated capacity of the battery.

10. The power estimation device according to claim 8, characterized in that: The receiving unit includes a CAN transceiver, and the processing unit is configured to send the battery power to the BMS through the CAN transceiver.

11. A power estimation system, characterized in that: The power estimation system comprises: A current acquisition unit, wherein the current acquisition unit is configured to acquire a current characteristic value of a battery branch through at least one acquisition channel among a plurality of acquisition channels, wherein the current characteristic value includes a current value and / or a current analog value; A power estimation device, the power estimation device comprising: A receiving unit, configured to receive the current characteristic value collected by the current collection unit; The processing unit is communicatively connected to the receiving unit and is configured to estimate the battery power according to the received current characteristic value.

12. The power estimation system according to claim 11, characterized in that: The power estimation system also includes: A battery management system BMS is communicatively connected with the processing unit, and the BMS is configured to determine a battery state of charge (SOC) according to the battery power.

13. The power estimation system according to claim 11, characterized in that: The power estimation system includes a communication unit, wherein the communication unit is configured to: receiving an upgrade request for a target application; Determine a partition where the currently running target application is located, wherein the partition includes a first partition and a second partition; In response to the currently running target application being located in the first partition, upgrading the target application in the second partition; In response to the currently running target application being located in the second partition, the target application in the first partition is upgraded.

14. A vehicle, characterized in that: The vehicle comprises the charge estimation device according to any one of claims 1 to 10 or the charge estimation system according to any one of claims 11 to 13.

15. A method for estimating electric quantity, characterized in that: The power estimation method comprises: Receiving a current characteristic value collected by at least one collection channel among a plurality of collection channels, wherein the current characteristic value includes a current value and / or a current analog value; The battery capacity is estimated based on the received current characteristic value.

16. The method for estimating electric quantity according to claim 15, characterized in that: The power estimation method is executed by the power estimation device according to any one of claims 1 to 10 or the power estimation system according to any one of claims 11 to 13.

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