Fast charging test apparatus, method and computer-readable storage medium

Abstract

This application relates to the field of batteries, and in particular to a fast-charging testing device, method, and computer-readable storage medium. The device includes: a first communication module for interacting with a charging device based on a first communication protocol; a second communication module for interacting with a battery pack based on a fast-charging protocol; a control module for responding to a fast-charging start message received by the first communication module, establishing a fast-charging protocol between the second communication module and the battery pack, sending charging parameters corresponding to the fast-charging protocol to the charging device via a charging request message; and monitoring the charging status and / or communication status of the battery pack based on the charging status and / or communication status obtained by the second communication module. This invention enables fast-charging testing of battery packs and solves the technical problem of mismatched communication protocols between the battery pack and the charging device.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to a fast charging test apparatus, method, and computer-readable storage medium. Background Technology

[0002] During the research and development process, the battery pack needs to undergo tests such as cycle charging, low-temperature charging, and fast charging time. The battery pack's built-in BMS controller communicates with the national standard charging pile in accordance with the national standard fast charging protocol (GB / T 27930-2015).

[0003] During battery pack testing, charging equipment provides charging voltage and current. However, this equipment only supports importing single-frame protocols according to the communication protocol import method specified in the equipment specifications to control the charging process and the charging voltage and current. The charging equipment used for fast charging testing of the battery pack does not support fast charging protocol import, thus creating a technical problem of communication protocol mismatch between the battery pack and the charging equipment. Summary of the Invention

[0004] Therefore, it is necessary to provide a fast charging test device, method, and computer-readable storage medium to address the aforementioned technical problems.

[0005] In a first aspect, embodiments of the present invention provide a fast charging testing device, the device comprising:

[0006] The first communication module is used to interact with the charging device based on the first communication protocol;

[0007] The second communication module is used to interact with the battery pack based on the fast charging protocol;

[0008] The control module is used to respond to the fast charging start message received by the first communication module, to establish a fast charging protocol between the second communication module and the battery pack, and to send the charging parameters corresponding to the fast charging protocol to the charging device through a charging request message.

[0009] And based on the charging status and / or communication status of the battery pack obtained by the second communication module, the charging status and / or communication status of the battery pack are monitored.

[0010] In some embodiments, the apparatus further includes:

[0011] The fast charging trigger module is used to send a trigger signal to trigger the battery pack to enter the fast charging process.

[0012] In some embodiments, the fast charging trigger module includes:

[0013] A first analog circuit is used to send a first trigger signal, which is used to simulate the first voltage received by the battery pack before it enters the fast charging process.

[0014] The second analog circuit is used to send a second trigger signal, which is used to simulate the second voltage received when the battery pack is connected to a low-voltage auxiliary power supply.

[0015] In some embodiments, the first analog circuit includes a first resistor, a second resistor, and a first switch connected in series. The first resistor, the second resistor, and the first switch are connected between a power supply terminal and a common point. The intermediate node of the first resistor and the first switch is connected to the battery pack, and the control terminal of the first switch is connected to the control module.

[0016] In some embodiments, the second analog circuit includes a fuse and a second switch connected in series. The input terminal of the fuse is connected to the power supply terminal, the output terminal of the second switch is connected to the battery pack, and the control terminal of the second switch is connected to the control module.

[0017] Secondly, embodiments of the present invention provide a fast charging testing method, applied to the device described in the first aspect, the method comprising:

[0018] In response to the fast charging start message received by the first communication module, the fast charging protocol between the second communication module and the battery pack is established.

[0019] The charging parameters corresponding to the fast charging protocol are sent to the charging device via a charging request message.

[0020] Based on the charging status and / or communication status of the battery pack obtained by the second communication module, the charging status and / or communication status of the battery pack are monitored.

[0021] In some embodiments, prior to the handshake of the fast charging protocol between the second communication module and the battery pack, the method further includes:

[0022] In response to the fast charging start message received by the first communication module, a trigger signal is sent to trigger the battery pack to enter the fast charging process.

[0023] In some embodiments, the method further includes:

[0024] In the event of an abnormal charging status and / or communication status of the battery pack, a fast charging completion message is sent to the charging device based on the first communication module.

[0025] In some embodiments, before responding to the fast charging start message received by the first communication module and shaking hands to establish a fast charging protocol between the second communication module and the battery pack, the method further includes:

[0026] Define the fast charging start message, charging request message, and fast charging end message, and import the fast charging start message, charging request message, and fast charging end message into the charging device.

[0027] Thirdly, embodiments of the present invention provide a computer-readable storage medium storing a computer program thereon, characterized in that, when the computer program is executed by a processor, it implements the steps of the method described in the second aspect:

[0028] In response to the fast charging start message received by the first communication module, the fast charging protocol between the second communication module and the battery pack is established.

[0029] The charging parameters corresponding to the fast charging protocol are sent to the charging device via a charging request message.

[0030] Based on the charging status and / or communication status of the battery pack obtained by the second communication module, the charging status and / or communication status of the battery pack are monitored.

[0031] Compared to existing technologies, this invention uses a first communication module to interact with the charging device based on a first communication protocol, and a second communication module to interact with the battery pack based on a fast charging protocol. The control module responds to the fast charging start message received by the first communication module, establishes a handshake between the second communication module and the battery pack to establish a fast charging protocol, and sends the charging parameters corresponding to the fast charging protocol to the charging device through a charging request message. Based on the charging status and / or communication status of the battery pack obtained by the second communication module, the control module monitors the charging status and / or communication status of the battery pack, thereby realizing fast charging testing of the battery pack and solving the technical problem of mismatched communication protocol interaction between the battery pack and the charging device. Attached Figure Description

[0032] Figure 1 A schematic diagram illustrating the application scenario of the fast charging test device in one embodiment provided in this application;

[0033] Figure 2 A schematic diagram of the fast charging test device in one embodiment provided in this application;

[0034] Figure 3 This is a schematic diagram of the fast charging test device in another embodiment provided in this application;

[0035] Figure 4 A circuit schematic diagram of the first analog circuit provided in one embodiment of this application;

[0036] Figure 5 A circuit schematic diagram of the second analog circuit in one embodiment provided in this application;

[0037] Figure 6 A flowchart illustrating a fast charging test method in one embodiment provided in this application;

[0038] Figure 7 A schematic diagram of the structure of the computer device in the first embodiment provided in this application. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application. Furthermore, it is understood that although the efforts made in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, modifications to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0040] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0041] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application means two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The terms “first,” “second,” “third,” etc., used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0042] like Figure 1 As shown in the figure, this embodiment of the invention proposes a fast charging test device 10, which is connected between a charging device 20 and a battery pack 30. The charging device 20 and the battery pack 30 are connected through a high-voltage bus, enabling the charging device 20 to charge the battery pack 30. The fast charging test device 10 is used to interact with the charging device 20 and the battery pack 30, thereby enabling the monitoring of the charging status and / or communication status of the battery pack 30.

[0043] In some embodiments, the fast charging test device 10 may be integrated inside the battery pack 30.

[0044] In some embodiments, the fast charging test device 10 and the battery pack 30 are powered by an external power supply, such as an external power supply that outputs 12V.

[0045] Considering that the charging device 20 used for fast charging testing of battery pack 30 does not support the import of fast charging protocols, there is a technical problem of mismatch between the communication protocols of battery pack 30 and charging device 20.

[0046] Based on this, such as Figure 2As shown in the figure, an embodiment of the present invention proposes a fast charging test device 10, which includes: a first communication module 110 for interacting with the charging device 20 based on a first communication protocol; a second communication module 120 for interacting with the battery pack 30 based on a fast charging protocol; a control module 130 for responding to the fast charging start message received by the first communication module 110, establishing a fast charging protocol between the second communication module 120 and the battery pack 30, sending the charging parameters corresponding to the fast charging protocol to the charging device 20 through a charging request message; and monitoring the charging status and / or communication status of the battery pack 30 based on the charging status and / or communication status of the battery pack 30 obtained by the second communication module 120.

[0047] In some embodiments, the first communication module 110 and the charging device 20 interact via the DCAN channel at a baud rate of 500kbps based on the CAN bus protocol.

[0048] It should be noted that the first communication module 110 can interact with the charging device 20 based on other existing protocols or a custom protocol.

[0049] In some embodiments, the second communication module 120 and the battery pack 30 interact via the CHCAN channel at a baud rate of 250kbps based on the fast charging protocol.

[0050] The fast charging test device 10 acquires the charging status and / or communication status of the battery pack 30 based on the second communication module 120, and monitors the charging status and / or communication status of the battery pack 30. For example, it acquires charging parameters such as current and voltage of the battery pack 30 during fast charging and determines whether the charging parameters are abnormal to test the battery pack 30. Alternatively, based on the communication status between the battery pack 30 and the fast charging test device 10, if a communication loss abnormality is detected, it is determined that the battery pack 30 has a communication fault.

[0051] In this embodiment, the first communication module 110 interacts with the charging device 20 based on a first communication protocol, and the second communication module 120 interacts with the battery pack 30 based on a fast charging protocol. The control module 130 responds to the fast charging start message received by the first communication module 110, establishes a handshake between the second communication module 120 and the battery pack 30 to establish a fast charging protocol, and sends the charging parameters corresponding to the fast charging protocol to the charging device 20 through a charging request message. Based on the charging status and / or communication status of the battery pack 30 obtained by the second communication module 120, the charging status and / or communication status of the battery pack 30 are monitored, thereby realizing fast charging testing of the battery pack 30 and solving the technical problem of mismatch in communication protocol interaction between the battery pack 30 and the charging device 20.

[0052] Considering that the fast charging protocol has a multi-frame format and strict process timing control, the charging device 20 does not support the import of the fast charging protocol. Therefore, the charging device 20 does not support the output of the guiding circuit signal to the battery pack 30 to start the fast charging process.

[0053] Based on this, in one embodiment, such as Figure 3 As shown, the device also includes a fast charging trigger module 140, which is used to send a trigger signal to trigger the battery pack 30 to enter the fast charging process, thereby solving the fast charging guidance problem of the battery pack 30.

[0054] Specifically, the fast charging trigger module 140 includes: a first analog circuit 141 for sending a first trigger signal, the first trigger signal being used to simulate the first voltage received by the battery pack 30 before entering the fast charging process; and a second analog circuit 142 for sending a second trigger signal, the second trigger signal being used to simulate the second voltage received by the battery pack 30 when connected to a low-voltage auxiliary power supply.

[0055] When the battery pack 30 detects the first voltage at the detection point and receives the second voltage, the battery pack 30 is woken up and enters the fast charging process, and the fast charging protocol between the second communication module 120 and the battery pack 30 is established to prepare for fast charging.

[0056] Specifically, such as Figure 4 As shown, the first analog circuit 141 includes a first resistor R1, a second resistor R2, and a first switch S1 connected in series. The first resistor R1, the second resistor R2, and the first switch S1 are connected between the power supply terminal and the common point. The intermediate node between the first resistor R1 and the first switch S1 is connected to the battery pack 30. The control terminal of the first switch S1 is connected to the control module 130.

[0057] like Figure 5 As shown, the second analog circuit 142 includes a fuse F1 and a second switch S2 connected in series. The input terminal of the fuse F1 is connected to the power supply terminal, the output terminal of the second switch S2 is connected to the battery pack 30, and the control terminal of the second switch S2 is connected to the control module 130.

[0058] The control module 130 responds to the fast charging start message received by the first communication module 110, controls the first switch S1 and the second switch to be turned on, and then establishes a fast charging protocol between the second communication module 120 and the battery pack 30. After the handshake is successful, the charging parameters corresponding to the fast charging protocol are sent to the charging device 20 through a charging request message. The charging device 20 outputs the corresponding charging voltage and current to charge the battery pack 30.

[0059] The charging process is terminated when the charging device 20 sends a termination message to the fast charging test device 10 or detects an abnormality in the charging status and / or communication status of the battery pack 30. The controller controls the disconnect switches S1 and S2, and the battery pack 30 exits the fast charging process.

[0060] In some embodiments, the message formats of the fast charging start message, charging request message, and fast charging end message can be defined, and the fast charging start message, charging request message, and fast charging end message can be imported into the charging device 20.

[0061] For example, several items among message address, message name, message period, message type, message length, message comment, byte order, bus network, and communication rate are defined.

[0062] The fast charging start message includes a charging start command. The charging request message includes the charging request voltage, charging request current, battery pack charging status, and debugging information from the fast charging test device. The fast charging end message includes a charging end command.

[0063] Each module in the aforementioned fast charging test device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0064] Based on the above hardware embodiments, this invention also proposes a fast charging testing method, such as... Figure 6 As shown, the method includes:

[0065] S602: In response to the fast charging start message received by the first communication module, the fast charging protocol between the second communication module and the battery pack is established.

[0066] S604: Send the charging parameters corresponding to the fast charging protocol to the charging device via a charging request message;

[0067] S606: Based on the charging status and / or communication status of the battery pack obtained by the second communication module, monitor the charging status and / or communication status of the battery pack.

[0068] In this embodiment, in response to the fast charging start message received by the first communication module, the fast charging protocol between the second communication module and the battery pack is established. The charging parameters corresponding to the fast charging protocol are sent to the charging device through a charging request message. Based on the charging status and / or communication status of the battery pack obtained by the second communication module, the charging status and / or communication status of the battery pack are monitored, thereby realizing fast charging testing of the battery pack and solving the technical problem of mismatch between the communication protocol interaction between the battery pack and the charging device.

[0069] In some embodiments, prior to the handshake of the fast charging protocol between the second communication module and the battery pack, the method further includes:

[0070] In response to the fast charging start message received by the first communication module, a trigger signal is sent to trigger the battery pack to enter the fast charging process.

[0071] In some embodiments, the method further includes:

[0072] In the event of an abnormal charging status and / or communication status of the battery pack, a fast charging completion message is sent to the charging device based on the first communication module.

[0073] In some embodiments, before responding to the fast charging start message received by the first communication module and shaking hands to establish a fast charging protocol between the second communication module and the battery pack, the method further includes:

[0074] Define the fast charging start message, charging request message, and fast charging end message, and import the fast charging start message, charging request message, and fast charging end message into the charging device.

[0075] For specific limitations on fast charging testing methods, please refer to the limitations on fast charging testing devices mentioned above, which will not be repeated here.

[0076] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the steps in any of the above-described fast charging test method embodiments:

[0077] In response to the fast charging start message received by the first communication module, the fast charging protocol between the second communication module and the battery pack is established.

[0078] The charging parameters corresponding to the fast charging protocol are sent to the charging device 20 via a charging request message;

[0079] Based on the charging status and / or communication status of the battery pack obtained by the second communication module, the charging status and / or communication status of the battery pack are monitored.

[0080] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 7 As shown. The computer device includes a processor, memory, and network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database stores motion detection data. The network interface communicates with external terminals via a network connection. When the computer program is executed by the processor, it implements the steps in any of the above fast charging test method embodiments.

[0081] The fast charging test method includes the following steps:

[0082] In response to the fast charging start message received by the first communication module, the fast charging protocol between the second communication module 120 and the battery pack is established.

[0083] The charging parameters corresponding to the fast charging protocol are sent to the charging device 20 via a charging request message;

[0084] Based on the charging status and / or communication status of the battery pack obtained by the second communication module, the charging status and / or communication status of the battery pack are monitored.

[0085] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0086] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fast charging testing device, characterized in that, The device includes: The first communication module is used to interact with the charging device based on the first communication protocol; The second communication module is used to interact with the battery pack based on the fast charging protocol; A fast charging trigger module is used to send a trigger signal to trigger the battery pack to enter the fast charging process. The fast charging trigger module includes: a first analog circuit for sending a first trigger signal, the first trigger signal being used to simulate a first voltage received by the battery pack before entering the fast charging process; and a second analog circuit for sending a second trigger signal, the second trigger signal being used to simulate a second voltage received by the battery pack when connected to a low-voltage auxiliary power supply. The control module is used to respond to the fast charging start message received by the first communication module, to establish a fast charging protocol between the second communication module and the battery pack, and to send the charging parameters corresponding to the fast charging protocol to the charging device through a charging request message. And based on the charging status and / or communication status of the battery pack obtained by the second communication module, the charging status and / or communication status of the battery pack are monitored.

2. The apparatus according to claim 1, characterized in that, The first analog circuit includes a first resistor, a second resistor, and a first switch connected in series. The first resistor, the second resistor, and the first switch are connected between the power supply terminal and a common point. The intermediate node between the first resistor and the first switch is connected to the battery pack. The control terminal of the first switch is connected to the control module.

3. The apparatus according to claim 1, characterized in that, The second analog circuit includes a fuse and a second switch connected in series. The input terminal of the fuse is connected to the power supply terminal, the output terminal of the second switch is connected to the battery pack, and the control terminal of the second switch is connected to the control module.

4. A fast charging test method, applied to the device as described in any one of claims 1 to 3, characterized in that, The method includes: In response to the fast charging start message received by the first communication module, the fast charging protocol between the second communication module and the battery pack is established. The charging parameters corresponding to the fast charging protocol are sent to the charging device via a charging request message. Based on the charging status and / or communication status of the battery pack obtained by the second communication module, the charging status and / or communication status of the battery pack are monitored.

5. The method according to claim 4, characterized in that, Before the handshake between the second communication module and the battery pack to establish the fast charging protocol, the following is also included: In response to the fast charging start message received by the first communication module, a trigger signal is sent to trigger the battery pack to enter the fast charging process.

6. The method according to claim 4, characterized in that, The method further includes: In the event of an abnormal charging status and / or communication status of the battery pack, a fast charging completion message is sent to the charging device based on the first communication module.

7. The method according to claim 6, characterized in that, Before responding to the fast charging start message received by the first communication module and shaking hands to establish a fast charging protocol between the second communication module and the battery pack, the method further includes: Define the fast charging start message, charging request message, and fast charging end message, and import the fast charging start message, charging request message, and fast charging end message into the charging device.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 4 to 7.

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