Battery pack current anomaly protection apparatus and method and computer storage medium

Abstract

The application discloses a kind of battery pack current abnormal protection device and method and computer storage medium, battery pack current abnormal protection device includes: fuse, for with battery pack electric connection, the breaking capacity of fuse is greater than the estimated short-circuit fault current of battery pack;Contactor, series connection with fuse, the action time of contactor is greater than the fusing time of fuse;Current sensor, for detecting the current of battery pack, the detection range of current sensor is greater than the rated current, peak current and overcurrent of battery pack;Battery management system, with fuse electric connection, for sending fusing signal to fuse.The application can realize the matching of fuse breaking capacity, the close cooperation of contactor and fuse, the high-precision high-response monitoring of current sensor.

Description

Technical Field

[0001] This invention relates to the field of battery safety technology, and in particular to a battery pack current abnormality protection device and method, and a computer storage medium. Background Technology

[0002] With the rapid advancement of electric vehicle technology, the safety and reliability of the battery pack, as its core driving component, have become key factors restricting the development of electric vehicles. Especially in battery pack current management, any abnormal current flow, particularly short-circuit faults, if not handled promptly and effectively, could trigger serious safety accidents, including but not limited to fires and explosions. Therefore, designing and optimizing battery pack current anomaly protection devices to ensure their efficient operation under various conditions has become an important topic in current electric vehicle technology research and development.

[0003] Currently, battery pack protection systems generally rely on components such as fuses, contactors, and current sensors to monitor current and provide protection against anomalies. However, in practical applications, the selection and matching of these components face numerous challenges. For example, there is the issue of accurately matching the breaking capacity of a fuse with the short-circuit fault current of the circuit system. If the fuse's breaking capacity is insufficient, it may fail to operate in time, thus failing to effectively cut off the circuit and causing secondary hazards such as electric arcing. Furthermore, the operating times of contactors and fuses under abnormal current conditions often exhibit delays or inconsistencies, significantly reducing the protection effect. In addition, existing current sensors often suffer from insufficient accuracy or slow response speed when monitoring battery pack current, affecting the accuracy and timeliness of anomaly protection.

[0004] Therefore, there is an urgent need for a battery pack current abnormality protection device and method that can achieve precise matching of fuse breaking capacity, close cooperation between contactor and fuse, and high-precision and high-response monitoring by current sensor. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of difficulty in selecting and matching components such as fuses, contactors, and current sensors in existing battery pack protection systems. This invention provides a battery pack current anomaly protection device and method, as well as a computer storage medium, which can achieve precise matching of fuse breaking capacity, close cooperation between contactors and fuses, and high-precision, high-response monitoring by current sensors.

[0006] To address the aforementioned technical problems, embodiments of the present invention disclose a battery pack current abnormality protection device, comprising:

[0007] A fuse for electrical connection to the battery pack, the fuse having a breaking capacity greater than the estimated short-circuit fault current of the battery pack;

[0008] A contactor is connected in series with the fuse, and the operating time of the contactor is greater than the melting time of the fuse.

[0009] A current sensor is used to detect the current of the battery pack, and the detection range of the current sensor is greater than the rated current, peak current and overcurrent of the battery pack.

[0010] A battery management system, electrically connected to the fuse, is used to send a fuse-breaking signal to the fuse.

[0011] By adopting the above technical solution, this application embodiment integrates fuses, contactors, current sensors and battery management systems to form a battery pack current abnormality protection device that can automatically perform selection matching and abnormal protection, thereby improving the protection effect and reliability of battery pack current abnormality.

[0012] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a battery pack current abnormality protection device, wherein the fuse has a pressure sensor for detecting the pressure value inside the battery pack.

[0013] By adopting the above technical solution, the embodiments of this application realize the self-triggering protection of fuses with active triggering and dual triggering functions under extreme working conditions such as collisions through pressure sensors.

[0014] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a battery pack current abnormality protection device, wherein the rated voltage of the fuse is greater than 1.5 times the rated voltage of the battery pack, the rated current of the fuse is greater than 3 times the rated current of the battery pack, and the breaking capacity of the fuse is greater than 5 times the estimated short-circuit fault current of the battery pack.

[0015] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a battery pack current abnormality protection device, wherein the rated voltage of the contactor is greater than the maximum voltage of the battery pack, and / or the rated current of the contactor is greater than the peak current of the battery pack.

[0016] According to another specific embodiment of the present invention, a battery pack current abnormality protection device is disclosed, wherein the rated voltage of the contactor is greater than the rated voltage of the battery pack, and the rated current of the contactor is greater than the rated current of the battery pack; the rated voltage of the fuse is greater than or equal to the highest voltage of the battery pack in a fully charged state, the rated current of the fuse is greater than the rated operating current of the battery pack and less than the estimated short-circuit fault current of the battery pack, and the breaking capacity of the fuse is greater than the estimated short-circuit fault current; wherein, the estimated short-circuit fault current is the maximum expected current when the positive and negative terminals of the battery pack are directly short-circuited in a fully charged state, and is obtained by dividing the highest voltage of the battery pack by the total DC internal resistance of the battery pack.

[0017] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a battery pack current abnormality protection device, which satisfies at least one of the following:

[0018] The rated voltage of the contactor is greater than the rated voltage of the battery pack;

[0019] The rated current of the contactor is greater than the rated operating current of the battery pack;

[0020] The peak current of the battery pack is less than the rated current of the contactor;

[0021] The current sensor's detection range covers the estimated short-circuit fault current of the battery pack.

[0022] The present invention also discloses a battery pack current abnormality protection method, applied to a battery pack current abnormality protection device, including a fuse, a contactor, and a current sensor. The battery pack current abnormality protection method includes: determining the rated voltage, rated current, estimated short-circuit fault current, maximum voltage, peak current, and overcurrent of the battery pack; determining that the breaking capacity of the fuse is greater than the estimated short-circuit fault current, selecting the fuse, and determining the fuse's fusing time; determining that the rated voltage of the contactor is greater than the maximum voltage of the battery pack, the rated current of the contactor is greater than the peak current of the battery pack, and the operating time of the contactor is greater than the fuse's fusing time, selecting the contactor; determining that the detection range of the current sensor covers the rated current, peak current, and overcurrent of the battery pack, selecting the current sensor; and determining that the current of the battery pack is greater than a preset current value, triggering the fuse.

[0023] By adopting the above technical solution, the embodiments of this application can accurately calculate the predicted short-circuit fault current of the circuit system based on various parameters of the battery pack (such as rated voltage, rated current, maximum voltage and peak current), and select fuses with corresponding breaking capacity to ensure that the fuses can act quickly and accurately when a short circuit occurs; at the same time, the selection and matching of contactors are optimized to ensure that the action time of the contactors matches the action time of the fuses, and high-precision, high-response current sensors are selected to provide a reliable basis for the abnormal protection of the battery pack.

[0024] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a method for protecting against abnormal current in a battery pack. The fuse further includes a pressure sensor, and the method for protecting against abnormal current in a battery pack further includes: determining, based on the pressure sensor, that the pressure value inside the battery pack is greater than a preset pressure value, and triggering the fuse.

[0025] By adopting the above technical solution, the embodiments of this application can independently trigger the fuse without relying on the BMS to send a fuse-breaking signal to the fuse under extreme working conditions such as a collision of the battery pack causing a sharp increase in internal pressure, thereby achieving safe power disconnection.

[0026] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a method for protecting a battery pack from abnormal current, wherein determining the fusing time of the fuse includes: determining the rated current of the selected fuse; and determining the fusing time of the fuse based on the time-current characteristic curve of the selected fuse.

[0027] By adopting the above technical solution, the embodiments of this application can verify the response time of the fuse under short-circuit fault current through the time-current characteristic curve, ensuring that it can complete the melting before the contactor operates and protect the contactor contacts.

[0028] Embodiments of the present invention also disclose a computer storage medium, including a memory and a processor, wherein the memory is adapted to store computer instructions, and the processor is adapted to execute the battery pack current abnormality protection method described above when running the computer instructions.

[0029] The beneficial effects of this invention are as follows: by precisely matching the breaking capacity of the fuse, it ensures that the fuse can operate quickly and accurately when a short circuit occurs; by optimizing the cooperation between the contactor and the fuse, it achieves close coordination between the two under abnormal current conditions, thereby improving the protection effect; by selecting a high-precision, high-response current sensor, it provides a reliable basis for abnormal protection; by introducing a fuse with a pressure sensor, it achieves independent protection of the fuse with active triggering and dual triggering functions without relying on the BMS signal, especially under extreme conditions such as collisions, it can automatically trigger power disconnection, significantly enhancing the safety and reliability of the battery pack current abnormal protection method and system.

[0030] To make the above description of the present invention more apparent and understandable, preferred embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0031] Figure 1 This diagram illustrates the structure of a battery pack current abnormality protection device according to an embodiment of the present invention.

[0032] Figure 2 A flowchart illustrating a battery pack current abnormality protection method according to an embodiment of the present invention is shown;

[0033] Figure 3 This diagram illustrates the time-current characteristic curve of a fuse according to an embodiment of the present invention.

[0034] Figure 4 This diagram illustrates a fuse-contactor matching curve according to an embodiment of the present invention.

[0035] Figure 5 A block diagram of an electronic device according to an embodiment of the present invention is shown;

[0036] Figure 6 A block diagram of a system-on-a-chip (SoC) provided in one embodiment of the present invention is shown. Detailed Implementation

[0037] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0038] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in during use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0040] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0041] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0042] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0043] Figure 1 A schematic diagram of a battery pack current abnormality protection device is shown according to some embodiments of this application.

[0044] refer to Figure 1This application provides a battery pack current abnormality protection device 1, which includes a fuse 200, a contactor 300, a current sensor 400, and a battery management system 500. The fuse 200 is electrically connected to the positive or negative output circuit (not shown in the figure) of the battery pack 100. Exemplarily, the breaking capacity of the fuse 200 is greater than the estimated short-circuit fault current of the battery pack 100. The estimated short-circuit fault current is the maximum expected current when the positive and negative terminals of the battery pack 100 are directly short-circuited in a fully charged state, obtained by dividing the highest voltage of the battery pack 100 by the total DC internal resistance of the battery pack 100. The contactor 300 is connected in series with the fuse 200, and the operating time of the contactor 300 is greater than the melting time of the fuse 200. The current sensor 400 is used to detect the current of the battery pack 100, and the detection range of the current sensor 400 is greater than the rated current, peak current, and overcurrent current of the battery pack 100. The battery management system 500 is electrically connected to the fuse 200 and is used to send a fuse-breaking signal to the fuse 200 to execute the battery pack current abnormality protection method of the present invention.

[0045] For example, such as Figure 1 As shown, the fuse 200 in this embodiment also includes a pressure sensor 210, which is used to detect the pressure value inside the battery pack 100. When extreme conditions such as a collision cause a sharp rise in the internal pressure of the battery pack 100, even if the battery management system 500 in this embodiment fails to function properly, that is, the battery management system 500 cannot send a fuse-breaking signal (e.g., a high-level digital signal or a current pulse) to the fuse 200 in a timely manner, the pressure sensor 210 can still directly trigger the fuse 200 to operate when it detects that the pressure value inside the battery pack 100 is greater than a preset pressure value, thereby achieving self-triggering protection and blowing the fuse.

[0046] For example, the self-triggering mechanism of the fuse 200 in this application embodiment can adopt the chemical triggering principle or the mechanical triggering principle, such as achieving self-triggering protection by pressure driving a firing pin or a gunpowder device.

[0047] For example, the battery pack current abnormality protection device 1 provided in this application satisfies at least one of the following: the rated voltage of the contactor 300 is greater than the rated voltage of the battery pack 100; or, the rated current of the contactor 300 is greater than the rated operating current of the battery pack 100; or, the peak current of the battery pack 100 is less than the rated current of the contactor 300; or, the detection range of the current sensor 400 covers the estimated short-circuit fault current of the battery pack 100.

[0048] In some possible implementations, specifically, the rated voltage of the fuse 200 is greater than 1.5 times the rated voltage of the battery pack 100, the rated current of the fuse 200 is greater than 3 times the rated current of the battery pack 100, and the breaking capacity of the fuse 200 is greater than 5 times the estimated short-circuit fault current of the battery pack 100.

[0049] In some possible implementations, for example, the rated voltage of contactor 300 is greater than the maximum voltage of battery pack 100, or the rated current of contactor 300 is greater than the peak current of battery pack 100. Alternatively, the rated voltage of contactor 300 is greater than the maximum voltage of battery pack 100 and the rated current of contactor 300 is greater than the peak current of battery pack 100.

[0050] In some possible implementations, exemplarily, the rated voltage of contactor 300 is greater than the rated voltage of battery pack 100, the rated current of contactor 300 is greater than the rated current of battery pack 100; the rated voltage of fuse 200 is greater than or equal to the highest voltage of battery pack 100 in a fully charged state, the rated current of fuse 200 is greater than the rated operating current of battery pack 100 and less than the estimated short-circuit fault current of battery pack 100, and the breaking capacity of fuse 200 is greater than the estimated short-circuit fault current.

[0051] Therefore, the battery pack current anomaly protection device of this application ensures that the fuse can operate quickly and accurately when a short circuit occurs by precisely matching the fuse breaking capacity; by optimizing the cooperation between the contactor and the fuse, close coordination between the two is achieved under current anomaly conditions, improving the protection effect; by selecting a high-precision, high-response current sensor, reliable basis is provided for anomaly protection; by introducing a fuse with a pressure sensor, independent protection without relying on BMS signals is achieved by the fuse having active triggering and dual triggering functions, especially in extreme cases such as collisions, where it can self-trigger power disconnection, significantly enhancing the safety and reliability of the battery pack current anomaly protection method and system.

[0052] The following is combined Figures 2 to 4 This application provides a detailed description of the battery pack current abnormality protection method provided in its embodiments. The battery pack current abnormality protection method of this application can be implemented by the battery management system 600 executing relevant programs.

[0053] refer to Figure 2 The battery pack current abnormality protection method provided according to a specific embodiment of this application includes the following steps:

[0054] S100: Determine the battery pack's rated voltage, rated current, estimated short-circuit fault current, maximum voltage, peak current, and overcurrent.

[0055] Here, the battery pack current abnormality protection device of this application embodiment first determines the key electrical parameters of the battery pack 100. Exemplarily, the battery pack 100 of this application embodiment is a double-layer 1P48S module composed of 52Ah cells. The energy of the battery pack 100 is 15.9kWh, the rated voltage of the battery pack 100 is 307.2V, the rated current of the battery pack 100 is 46.6A, the maximum voltage of the battery pack 100 is 350.4V, and the peak current of the battery pack 100 is 110A. However, this is not a limitation; this application embodiment does not specifically limit the electrical parameters of the battery pack 100, and can select them according to actual conditions.

[0056] The estimated short-circuit fault current is the maximum expected current when the positive and negative terminals of the battery pack are directly shorted when it is fully charged. Specifically, in this embodiment, the estimated short-circuit fault current of the battery pack is 2.4kA. This value is obtained by dividing the highest voltage of the battery pack (350.4V) when it is fully charged by the total DC internal resistance of the battery pack (0.146Ω). This corresponds to the maximum expected current when the positive and negative terminals are directly shorted under the most severe operating conditions of 100% charge and 25°C, which can be used as the basis for selecting the breaking capacity of the fuse.

[0057] S200: Determine that the breaking capacity of the fuse is greater than the estimated short-circuit fault current, select the fuse and determine the fuse's melting time.

[0058] Here, the battery pack current abnormality protection device of this application embodiment selects and verifies the fuse 200 based on the various electrical parameters of the battery pack 100 determined in step S100 above. For example, the rated voltage of the fuse 200 selected in this application embodiment is greater than 1.5 times the rated voltage of the battery pack 100, the rated current of the fuse 200 is greater than 3 times the rated current of the battery pack 100, and the breaking capacity of the fuse 200 is greater than 5 times the estimated short-circuit fault current of the battery pack 100. Those skilled in the art will understand that the breaking capacity of the fuse 200 refers to the maximum current value that the fuse can safely interrupt under rated voltage.

[0059] For example, based on the electrical parameters of the battery pack 100 determined in step S100 above, the battery pack current abnormality protection device in this embodiment of the application selects an RS309-MD-EVD150A type fuse. The rated voltage of the fuse 200 is DC500V, the rated current of the fuse 200 is 150A, and the breaking capacity of the fuse 200 is DC20kA. The breaking capacity of the fuse 200 (20kA) is much greater than the estimated short-circuit fault current of the battery pack 100 (2.4kA), thus meeting the requirements.

[0060] And, as Figure 3As shown in the figure, according to the time-current characteristic curve of fuse 200, there are four curves in the figure, labeled as 175A, 150A, 125A and 100A respectively. These values ​​represent the rated current of the fuse. That is, the figure shows four fuses with different rated currents.

[0061] It is understood that fuses with different rated currents have different time-current characteristics. The rated current of the fuse 200 in this embodiment is 150A. Therefore, based on the time-current characteristic curve of the fuse 200 with a rated current of 150A, the battery pack current abnormality protection device in this embodiment can determine that the fusing time of the fuse 200 when the estimated short-circuit fault current of the battery pack 100 is 2.4kA is about 1ms.

[0062] S300: Select a contactor if the rated voltage of the contactor is greater than the maximum voltage of the battery pack, the rated current of the contactor is greater than the peak current of the battery pack, and the operating time of the contactor is greater than the melting time of the fuse.

[0063] Here, the battery pack current abnormality protection device of this application embodiment selects the contactor 300 based on the various electrical parameters of the battery pack 100 determined in step S100 above. For example, the rated voltage of the contactor 300 selected in this application embodiment is greater than the highest voltage of the battery pack 100, the rated current of the contactor 300 is greater than the peak current of the battery pack 100, and the operating time of the contactor 300 is greater than the melting time of the fuse 200.

[0064] For example, based on the electrical parameters of the battery pack 100 determined in step S100 above, the battery pack current abnormality protection device of this application embodiment selects the Hongfa HFE82V-100D contactor. The rated voltage of the contactor 300 is DC750V, which is greater than the maximum voltage of the battery pack 100, 350.4V. The rated current of the contactor 300 is 120A, which is greater than the peak current of the battery pack 100, 110A, thus meeting the requirements.

[0065] At the same time, such as Figure 4 As shown in the figure, according to the matching curve diagram of the fuse and the contactor, the figure shows the minimum short-circuit current curve and the maximum short-circuit current curve of the battery pack 100, as well as the operating time curve of the contactor 300 and the fusing time curve of the fuse 200.

[0066] It is understood that under the minimum short-circuit current (e.g., 1900A), the fusing time of the fuse 200 in this embodiment is 1ms, while the operating time (e.g., mechanical disconnection time) of the contactor 300 in this embodiment is approximately 100-500ms, which is much greater than 1ms. In other words, the battery pack current abnormality protection device in this embodiment ensures that the operating time of the contactor 300 is greater than the fusing time of the fuse 200.

[0067] S400: Determine the current sensor's detection range to cover the battery pack's rated current, peak current, and overcurrent, and select the appropriate current sensor.

[0068] Here, the battery pack current abnormality protection device of this application embodiment selects the current sensor 400 based on the various electrical parameters of the battery pack 100 determined in step S100 above. That is, the detection range of the current sensor 400 covers the rated current, peak current and overcurrent of the battery pack 100.

[0069] For example, based on the electrical parameters of the battery pack 100 determined in step S100 above, the battery pack current abnormality protection device of this application embodiment selects a high-precision current sensor. The detection range of the current sensor 400 is ±200A, covering the rated current of the battery pack 100 (46.6A), the peak current of the battery pack 100 (110A), and the overcurrent of the battery pack 100 (e.g., 1000A).

[0070] S500: If the current of the battery pack is found to be greater than the preset current value, the fuse is triggered.

[0071] After completing the selection and matching steps S200 to S400, the battery management system 500 of the battery pack current abnormality protection device enters normal operation. The battery management system 500 monitors the current of the battery pack 100 in real time through the current sensor 400. When the battery management system 500 detects through the current sensor 400 that the current of the battery pack 100 is greater than a preset current value (e.g., exceeding the peak current of 110A or the short-circuit current threshold), the battery management system 500 sends a fusing signal (e.g., a high-level digital signal or a current pulse) to the fuse 200, triggering the fuse 200 to operate and disconnect the circuit. However, this embodiment does not specifically limit the triggering adjustment of the battery management system 600 sending the fusing signal to the fuse 200. In other possible implementations, for example, when the battery management system 500 detects a collision signal, insulation fault signal, or other serious faults, the battery management system 500 can also send a fusing signal to the fuse 200 to trigger the fuse 200 to operate and disconnect the circuit.

[0072] It should be noted that the aforementioned fuse triggering conditions are parallel triggering conditions; the fuse will be triggered if any one of them is met.

[0073] In summary, through the above steps S100 to S500, the battery pack current abnormality protection method of this application embodiment achieves accurate selection and matching of fuses, coordination of the action time of contactors and fuses, selection of high-precision current sensors, and active triggering and dual triggering mechanisms (such as current triggering and pressure triggering), which significantly improves the protection effect of the battery pack under abnormal current conditions and the safety under extreme operating conditions.

[0074] In addition, the present invention also provides a computer storage medium, including a memory and a processor, the memory being adapted to store computer instructions, and the processor being adapted to execute the battery pack current abnormality protection method described in any of the above embodiments when running the computer instructions.

[0075] Now for reference Figure 5 The diagram shows a block diagram of an electronic device 800 according to one embodiment of this application. The electronic device 800 is, for example, a smart mobile terminal. The electronic device 800 may include one or more processors 801 coupled to a controller hub 803. In at least one embodiment, the controller hub 803 communicates with the processor 801 via a multi-branch bus such as a Front Side Bus (FSB), a point-to-point interface such as a QuickPath Interconnect (QPI), or a similar connection. The processor 801 executes instructions controlling general-type data processing operations. In one embodiment, the controller hub 803 includes, but is not limited to, a Graphics & Memory Controller Hub (GMCH) (not shown) and an Input / Output Hub (IOH) (which may be on a separate chip) (not shown), wherein the GMCH includes memory and a graphics host and is coupled to the IOH.

[0076] Electronic device 800 may also include a coprocessor 802 and a memory 804 coupled to a controller hub 803. Alternatively, one or both of the memory and GMCH may be integrated within the processor, with memory 804 and coprocessor 802 directly coupled to processor 801 and controller hub 803, which is on a single chip with IOH.

[0077] Memory 804 may be, for example, Dynamic Random Access Memory (DRAM), Phase Change Memory (PCM), or a combination of both. Memory 804 may include one or more tangible, non-transitory computer-readable media for storing data and / or instructions. The computer-readable storage medium stores instructions, specifically, temporary and permanent copies of those instructions. The instructions may include, when executed by at least one of the processors, causing the electronic device 800 to perform, as... Figure 2 The instructions for the battery pack current abnormality protection method are shown. When the instructions are executed on a computer, the computer performs the method disclosed in any of the above embodiments or combinations thereof, to achieve precise selection and matching of fuses, timing coordination between contactors and fuses, selection of high-precision current sensors, and active triggering and dual triggering mechanisms (e.g., current triggering and pressure triggering).

[0078] In one embodiment, the coprocessor 802 is a dedicated processor, such as, for example, a high-throughput MIC (Many Integrated Core) processor, a network or communication processor, a compression engine, a graphics processor, a GPGPU (General-purpose computing on graphics processing units), or an embedded processor, etc. Optional properties of the coprocessor 802 are indicated by dashed lines. Figure 5 middle.

[0079] In one embodiment, electronic device 800 may further include a network interface (NIC, Network Interface Controller) 806. Network interface 806 may include a transceiver for providing a radio interface for electronic device 800 to communicate with any other suitable device, such as a front-end module, antenna, etc. In various embodiments, network interface 806 may be integrated with other components of electronic device 800. Network interface 806 can implement the functions of the communication unit in the above embodiments.

[0080] Electronic device 800 may further include input / output (I / O) device 805. Input / output device 805 may include: a user interface designed to enable a user to interact with electronic device 800; a peripheral component interface designed to enable peripheral components to also interact with electronic device 800; and / or sensors designed to determine environmental conditions and / or location information related to electronic device 800.

[0081] It is worth noting that, Figure 5This is merely an example. That is, although... Figure 5 The electronic device 800 shown includes multiple devices such as a processor 801, a controller hub 803, and a memory 804. However, in practical applications, devices using the methods of this application may include only a portion of the devices in the electronic device 800. For example, it may include only the processor 801 and the network interface 806. Figure 5 The properties of the optional devices are shown by dashed lines.

[0082] Now for reference Figure 6 The diagram shown is a block diagram of a SoC (System on Chip) 900 according to an embodiment of this application. Figure 6 In this context, similar components share the same reference numerals. Figure 6 In this SoC, the SoC includes: an interconnect unit 950 coupled to a first processor 910; a system proxy unit 980; a bus controller unit 990; an integrated memory controller unit 940; one or more second processors 920, which may include integrated graphics logic, an image processor, an audio processor, and a video processor; a static random-access memory (SRAM) unit 930; and a direct memory access (DMA) unit 960. In one embodiment, the second processor 920 includes a dedicated processor, such as, for example, a network or communication processor, a compression engine, a GPGPU (General-purpose computing on graphics processing units), a high-throughput MIC processor, or an embedded processor.

[0083] Static random access memory (SRAM) cell 930 may include one or more tangible, non-transitory computer-readable media for storing data and / or instructions. The computer-readable storage medium stores instructions, specifically, temporary and permanent copies of those instructions. These instructions may include, when executed by at least one of the processors, causing the SoC implementation to... Figure 2 The instructions for the battery pack current abnormality protection method are shown. When the instructions are executed on a computer, the computer performs the method disclosed in the above embodiments.

[0084] This application also provides a computer program product for implementing the battery pack current abnormality protection method provided in the above embodiments.

[0085] Various embodiments of the mechanisms disclosed in this application can be implemented in hardware, software, firmware, or combinations of these implementation methods. Embodiments of this application can be implemented as computer program modules or module code executable on a programmable system, the programmable system including at least one processor, a storage system (including volatile and non-volatile memory and / or storage elements), at least one input device, and at least one output device.

[0086] Computer program modules or module code can be applied to input instructions to perform the functions described in this application and generate output information. The output information can be applied to one or more output devices in a known manner. For the purposes of this application, the processing system includes any system having a processor such as, for example, a digital signal processor (DSP), a microcomputer, an application-specific integrated circuit (ASIC), or a microprocessor.

[0087] Module code can be implemented using a high-level modular language or an object-oriented programming language to communicate with the processing system. Assembly language or machine language can also be used to implement module code when needed. In fact, the mechanisms described in this application are not limited to any particular programming language. In either case, the language can be a compiled language or an interpreted language.

[0088] In some cases, the disclosed embodiments may be implemented in hardware, firmware, software, or any combination thereof. The disclosed embodiments may also be implemented as instructions carried or stored thereon on one or more temporary or non-temporary machine-readable (e.g., computer-readable) storage media, which may be read and executed by one or more processors. For example, the instructions may be distributed via a network or through other computer-readable media. Therefore, machine-readable media may include any mechanism for storing or transmitting information in a machine-readable (e.g., computer-readable) form, including but not limited to floppy disks, optical disks, optical discs, magneto-optical disks, read-only memory (ROM), random access memory (RAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic cards or optical cards, flash memory, or tangible machine-readable storage for transmitting information (e.g., carrier waves, infrared signals, digital signals, etc.) using the Internet in the form of electrical, optical, acoustic, or other forms of propagated signals. Therefore, machine-readable media include any type of machine-readable medium suitable for storing or transmitting electronic instructions or information in a machine-readable (e.g., computer-readable) form.

[0089] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A battery pack current abnormality protection device, characterized in that, include: A fuse for electrical connection to the battery pack, the fuse having a breaking capacity greater than the estimated short-circuit fault current of the battery pack; A contactor is connected in series with the fuse, and the operating time of the contactor is longer than the melting time of the fuse. A current sensor is used to detect the current of the battery pack, and the detection range of the current sensor is greater than the rated current, peak current and overcurrent of the battery pack. A battery management system, electrically connected to the fuse, is used to send a fuse-breaking signal to the fuse.

2. The battery pack current abnormality protection device according to claim 1, characterized in that, The fuse has a pressure sensor for detecting the pressure value inside the battery pack.

3. The battery pack current abnormality protection device according to claim 1 or 2, characterized in that, The rated voltage of the fuse is greater than 1.5 times the rated voltage of the battery pack, the rated current of the fuse is greater than 3 times the rated current of the battery pack, and the breaking capacity of the fuse is greater than 5 times the estimated short-circuit fault current of the battery pack.

4. The battery pack current abnormality protection device according to claim 1 or 2, characterized in that, The rated voltage of the contactor is greater than the maximum voltage of the battery pack, and / or the rated current of the contactor is greater than the peak current of the battery pack.

5. The battery pack current abnormality protection device according to claim 1 or 2, characterized in that, The rated voltage of the contactor is greater than the rated voltage of the battery pack, and the rated current of the contactor is greater than the rated current of the battery pack; the rated voltage of the fuse is greater than or equal to the highest voltage of the battery pack in a fully charged state, the rated current of the fuse is greater than the rated operating current of the battery pack and less than the estimated short-circuit fault current of the battery pack, and the breaking capacity of the fuse is greater than the estimated short-circuit fault current. The estimated short-circuit fault current is the maximum expected current when the positive and negative terminals of the battery pack are directly shorted in a fully charged state, and is obtained by dividing the highest voltage of the battery pack by the total DC internal resistance of the battery pack.

6. The battery pack current abnormality protection device according to claim 1 or 2, characterized in that, At least one of the following must be met: The rated voltage of the contactor is greater than the rated voltage of the battery pack; The rated current of the contactor is greater than the rated operating current of the battery pack; The peak current of the battery pack is less than the rated current of the contactor; The current sensor's detection range covers the estimated short-circuit fault current of the battery pack.

7. A method for protecting a battery pack from abnormal current, applied to a battery pack current abnormality protection device, comprising a fuse, a contactor, and a current sensor, characterized in that, The battery pack current abnormality protection method includes: Determine the battery pack's rated voltage, rated current, estimated short-circuit fault current, maximum voltage, peak current, and overcurrent; Determine that the breaking capacity of the fuse is greater than the estimated short-circuit fault current, select the fuse, and determine the fuse's melting time; The contactor is selected based on the following conditions: its rated voltage is greater than the maximum voltage of the battery pack, its rated current is greater than the peak current of the battery pack, and its operating time is greater than the melting time of the fuse. The current sensor is selected based on the determination that its detection range covers the rated current, peak current, and overcurrent of the battery pack. If the current of the battery pack is determined to be greater than a preset current value, the fuse is triggered.

8. The battery pack current abnormality protection method according to claim 7, characterized in that, The fuse also has a pressure sensor, and the battery pack current abnormality protection method further includes: The pressure sensor determines that the pressure inside the battery pack is greater than a preset pressure value, triggering the fuse.

9. The battery pack current abnormality protection method according to claim 7, characterized in that, Determining the fusing time of the fuse includes: Determine the rated current of the selected fuse; The fusing time of the selected fuse is determined based on its time-current characteristic curve.

10. A computer storage medium, characterized in that, The device includes a memory and a processor, the memory being adapted to store computer instructions, and the processor being adapted to execute, when running the computer instructions, the battery pack current abnormality protection method according to any one of claims 7 to 9.

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