Disconnection detection method and energy storage battery management system

Abstract

The invention belongs to the technical field of energy storage batteries, and provides a disconnection detection method and an energy storage battery management system, and the disconnection detection method comprises the steps: configuring a detection network and a detection assembly; the detection network is connected with the detection assembly; the detection assembly comprises an insulation monitoring controller and a broken line fault detection circuit; and based on the detection network and the detection assembly, carrying out disconnection detection on the high-voltage bus and the detection signal line of the energy storage battery pack, and carrying out disconnection detection on the monomer connection line of the energy storage battery pack. Through the protection plate and the lithium battery pack, the protection assembly, the relay assembly, the monitoring assembly and the controller which are arranged on the protection plate, reliable protection can be correspondingly implemented on the lithium battery pack for the electric vehicle, and function exertion and long-term use of the lithium battery pack are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage batteries, and in particular to a disconnection detection method and an energy storage battery management system. Background Art

[0002] In recent years, with the widespread application of lithium-ion batteries in energy storage equipment, the safe connection of lithium-ion batteries is the basis for ensuring the efficient use of energy storage equipment. In order to ensure the safe connection of lithium-ion batteries, it is necessary to perform real-time detection of the connection lines between lithium-ion batteries to ensure the normal operation of the connection lines and avoid the impact of disconnection on the performance of lithium-ion batteries. At present, there is a lack of accurate and effective detection methods and energy storage battery management systems for the detection of internal connection lines of energy storage batteries; The patent with application number CN202311436119.9 discloses a disconnection detection method and a battery management system, which is applied to a detection chip for realizing cell voltage detection. The detection chip has a positive port and a negative port, and is configured with a first detection module and a second detection module. The first detection module is used to detect the voltage of each cell in the cell group to obtain a first detection result; the second detection module is used to detect the voltage of each cell, negative port or positive port in the cell group to obtain a second detection result; when the positive port or negative port of the cell group is disconnected, the disconnection of the positive port or negative port can be judged according to the difference between the first detection result and the second detection result, thereby realizing the detection of the disconnection of the positive and negative ports. This detection method relies on the detection chip for detection. The cost and configuration quantity of the detection chip determine the application scenario of the detection, so that large-scale energy storage batteries cannot be effectively detected, and the detection accuracy of the detection chip is also different, resulting in missed detection and false detection.

[0003] Therefore, it is necessary to provide a disconnection detection method and an energy storage battery management system. Summary of the invention

[0004] The present invention provides a line break detection method and an energy storage battery management system. Through a configured detection network and detection components, line break detection is performed on the high-voltage busbar and detection signal line of the energy storage battery group, and line break detection is performed on the single-cell connection line of the energy storage battery group. Accurate and efficient line break detection can be achieved, which is beneficial to ensuring the normal function of the energy storage battery group.

[0005] The present invention provides a disconnection detection method, comprising: Configure a detection network and detection components; the detection network is connected to the detection components; the detection components include an insulation monitoring controller and a disconnection fault detection circuit; Based on the detection network and detection components, the high-voltage busbar and detection signal line of the energy storage battery pack are detected for disconnection, and the single cell connection line of the energy storage battery pack is detected for disconnection.

[0006] Furthermore, the detection network and detection components are configured, including: Configure the controllers and network connection components in the detection network; Configure the connection relationship between the controller, network connection components, and detection components.

[0007] Furthermore, the network connection component includes a wireless network component and an electrical connection component; the wireless network component is used to connect the controller and the insulation monitoring controller; the electrical connection component is used to connect the controller and the line break fault detection circuit.

[0008] Furthermore, the line break fault detection circuit includes a current feedback subcircuit, a pulse modulation subcircuit and a counter; the current feedback subcircuit is connected to the pulse modulation subcircuit; the pulse modulation subcircuit is connected to the counter; the current feedback subcircuit is used to obtain a feedback current signal; the pulse modulation subcircuit is used to generate a pulse signal based on the feedback current signal; the counter is used to count the pulse signal to obtain a counting result.

[0009] Furthermore, the high-voltage busbar and the detection signal line of the energy storage battery pack are detected for disconnection, and the single-cell connection line of the energy storage battery pack is detected for disconnection, including: Based on the insulation monitoring controller, a high-voltage busbar and a detection signal line of the energy storage battery group are detected for disconnection to obtain a first detection result; Based on the disconnection fault detection circuit, a disconnection detection is performed on the single-cell connection line of the energy storage battery group to obtain a second detection result; The first detection result and the second detection result are summarized to obtain a detection result.

[0010] Furthermore, based on the insulation monitoring controller, the high-voltage busbar and the detection signal line of the energy storage battery group are subjected to disconnection detection to obtain a first detection result, including: Set the detection cycle; Based on the detection cycle, the controller is used to control the insulation monitoring controller to start, and the high-voltage bus and detection signal line of the energy storage battery group are tested for disconnection to obtain several cycle detection results; After summarizing the detection results of several cycles, a first detection result is obtained.

[0011] Further, based on the disconnection fault detection circuit, a disconnection detection is performed on the single cell connection line of the energy storage battery pack to obtain a second detection result, including: Obtain the position of the single cell connection line of the energy storage battery pack; Based on the current feedback subcircuit in the disconnection fault detection circuit, the connection is made at the monomer connection line position through a plurality of configured independent control switches; Based on the controller, the independent control switch is controlled to open and close through the set control command, so as to control the current feedback subcircuit to receive the feedback current signal, and based on the pulse modulation subcircuit and the counter, the counting result of the pulse signal is obtained; A second detection result is obtained according to the counting result.

[0012] Furthermore, it also includes identifying and confirming the test results, specifically: Based on the controller, for the first detection result, by comparing the strength of the insulation signal in several periodic detection results with a set reference strength of the insulation signal, the periodic detection result corresponding to the insulation signal greater than the set reference strength is used as the first detection result finally confirmed; Based on the controller, for the second detection result, the amplitude of the pulse signal is compared with the set reference amplitude of the pulse signal, the pulse signal greater than the set reference amplitude is included in the count, and the pulse signal less than the set reference amplitude is not included in the count, and the counting result of the pulse signal included in the count is used as the final confirmed second detection result.

[0013] The energy storage battery management system is designed and implemented based on a disconnection detection method, including: A configuration module is used to configure a detection network and a detection component; the detection network is connected to the detection component; the detection component includes an insulation monitoring controller and a disconnection fault detection circuit; A detection module is used to perform disconnection detection on the high-voltage busbar and detection signal line of the energy storage battery pack and on the single-cell connection line of the energy storage battery pack based on the detection network and detection components to obtain disconnection detection results; The processing and response module is used to perform corresponding processing and response according to the position of the disconnected single-cell connection line based on the disconnection detection result.

[0014] Furthermore, based on the disconnection detection result, corresponding processing and response are performed according to the location of the disconnected single-cell connection line, including: Configure the circuit breaker protection component connected to the controller; Configure relays, which are connected to the controller and the energy storage battery pack respectively; Based on the disconnection detection result, the controller is used to control the startup of the circuit breaker protection component to handle the situation, or the relay is controlled to close according to the position of the interrupted single-unit connection line.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: by performing disconnection detection on the high-voltage busbar and detection signal line of the energy storage battery pack based on the configuration and the detection component, as well as performing disconnection detection on the single cell connection line of the energy storage battery pack, the disconnection detection can be performed accurately and efficiently, which is beneficial to ensuring the normal function of the energy storage battery pack.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the steps of the disconnection detection method; Figure 2 A schematic diagram of the steps for configuring a detection network and detection components; Figure 3 This is a schematic diagram of the energy storage battery management system structure. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0020] The present invention provides a disconnection detection method, such as Figure 1 As shown, it includes: configuring a detection network and a detection component; connecting the detection network to the detection component; the detection component includes an insulation monitoring controller and a disconnection fault detection circuit; Based on the detection network and detection components, the high-voltage busbar and detection signal line of the energy storage battery pack are detected for disconnection, and the single cell connection line of the energy storage battery pack is detected for disconnection.

[0021] The working principle of the above technical solution is: in order to realize a line break detection method, the present invention first configures a detection network and a detection component; the detection network is connected to the detection component; the detection component includes an insulation monitoring controller and a line break fault detection circuit; then based on the detection network and the detection component, the high-voltage busbar and the detection signal line of the energy storage battery group are detected for line break, and the single cell connection line of the energy storage battery group is detected for line break.

[0022] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the high-voltage busbar and detection signal line of the energy storage battery pack are detected for line break, and the single-cell connection line of the energy storage battery pack is detected for line break, so that accurate and efficient line break detection can be achieved, which is conducive to ensuring the normal function of the energy storage battery pack.

[0023] In one embodiment, Figure 2 As shown, configure the detection network and detection components, including: Configure the controllers and network connection components in the detection network; Configure the connection relationship between the controller, network connection components, and detection components.

[0024] The working principle of the above technical solution is: in order to configure the detection network and the detection component, the present invention first configures the controller and the network connection component in the detection network; and then configures the connection relationship between the controller, the network connection component and the detection component.

[0025] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the functions of the detection network and the detection components can be guaranteed by configuring the detection network and the detection components.

[0026] In one embodiment, the network connection component includes a wireless network component and an electrical connection component; the wireless network component is used to connect the controller and the insulation monitoring controller; the electrical connection component is used to connect the controller and the line break fault detection circuit.

[0027] The working principle of the above technical solution is: in order to realize the function of the network connection component, the present invention proposes a wireless network component and an electrical connection component; the wireless network component is used to connect the controller and the insulation monitoring controller; the electrical connection component is used to connect the controller and the line break fault detection circuit.

[0028] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the signal acquisition of the circuit parameters of the energy storage battery pack can be realized through the configuration of the network connection component.

[0029] In one embodiment, a line break fault detection circuit includes a current feedback subcircuit, a pulse modulation subcircuit and a counter; the current feedback subcircuit is connected to the pulse modulation subcircuit; the pulse modulation subcircuit is connected to the counter; the current feedback subcircuit is used to obtain a feedback current signal; the pulse modulation subcircuit is used to generate a pulse signal according to the feedback current signal; the counter is used to count the pulse signal to obtain a counting result.

[0030] The working principle of the above technical solution is: in order to realize the function of the line break fault detection circuit, the present invention proposes a current feedback sub-circuit, a pulse modulation sub-circuit and a counter; the current feedback sub-circuit is connected to the pulse modulation sub-circuit; the pulse modulation sub-circuit is connected to the counter; the current feedback sub-circuit is used to obtain a feedback current signal; the pulse modulation sub-circuit is used to generate a pulse signal according to the feedback current signal; the counter is used to count the pulse signal to obtain a counting result.

[0031] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the disconnection fault detection can be realized through the configuration of the disconnection fault detection circuit.

[0032] In one embodiment, the high voltage busbar and the detection signal line of the energy storage battery pack are detected for disconnection, and the single cell connection line of the energy storage battery pack is detected for disconnection, including: Based on the insulation monitoring controller, a high-voltage busbar and a detection signal line of the energy storage battery group are detected for disconnection to obtain a first detection result; Based on the disconnection fault detection circuit, a disconnection detection is performed on the single-cell connection line of the energy storage battery group to obtain a second detection result; The first detection result and the second detection result are summarized to obtain a detection result.

[0033] The working principle of the above technical solution is: in order to perform line break detection on the high-voltage busbar and the detection signal line of the energy storage battery group, and to perform line break detection on the single-cell connection line of the energy storage battery group, the present invention first performs line break detection on the high-voltage busbar and the detection signal line of the energy storage battery group based on the insulation monitoring controller to obtain a first detection result; then, based on the line break fault detection circuit, performs line break detection on the single-cell connection line of the energy storage battery group to obtain a second detection result; finally, the first detection result and the second detection result are summarized to obtain a detection result.

[0034] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, accurate disconnection detection results can be obtained by performing disconnection detection on the high-voltage busbar and detection signal line of the energy storage battery pack, and performing disconnection detection on the single cell connection line of the energy storage battery pack.

[0035] In one embodiment, based on the insulation monitoring controller, a high-voltage busbar and a detection signal line of the energy storage battery pack are subjected to a disconnection detection to obtain a first detection result, including: Set the detection cycle; Based on the detection cycle, the controller is used to control the insulation monitoring controller to start, and the high-voltage bus and detection signal line of the energy storage battery group are tested for disconnection to obtain several cycle detection results; After summarizing the detection results of several cycles, a first detection result is obtained.

[0036] The working principle of the above technical solution is: in order to perform disconnection detection on the high-voltage bus and the detection signal line of the energy storage battery group based on the insulation monitoring controller to obtain the first detection result, the present invention first sets a detection cycle; then based on the detection cycle, the controller is used to control the insulation monitoring controller to start, and the high-voltage bus and the detection signal line of the energy storage battery group are disconnected to obtain several cycle detection results; finally, after summarizing the several cycle detection results, the first detection result is obtained.

[0037] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the high-voltage bus and the detection signal line of the energy storage battery pack are detected for line break based on the insulation monitoring controller, so that the line break detection of these two types of lines, the high-voltage bus and the detection signal line, can be realized.

[0038] In one embodiment, based on the disconnection fault detection circuit, a disconnection detection is performed on a single cell connection line of the energy storage battery pack to obtain a second detection result, including: Obtain the position of the single cell connection line of the energy storage battery pack; Based on the current feedback subcircuit in the disconnection fault detection circuit, the connection is made at the monomer connection line position through a plurality of configured independent control switches; Based on the controller, the independent control switch is controlled to open and close through the set control command, so as to control the current feedback subcircuit to receive the feedback current signal, and based on the pulse modulation subcircuit and the counter, the counting result of the pulse signal is obtained; A second detection result is obtained according to the counting result.

[0039] The working principle of the above technical solution is: in order to realize the disconnection detection of the single cell connection line of the energy storage battery group based on the disconnection fault detection circuit and obtain the second detection result, the present invention first obtains the position of the single cell connection line of the energy storage battery group; then based on the current feedback subcircuit in the disconnection fault detection circuit, it is connected at the position of the single cell connection line through a plurality of configured independent control switches; based on the controller, through the set control command, the opening and closing of the independent control switch is controlled, thereby controlling the current feedback subcircuit to receive the feedback current signal, and based on the pulse modulation subcircuit and the counter, the counting result of the pulse signal is obtained; finally, according to the counting result, the second detection result is obtained.

[0040] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the single cell connection line of the energy storage battery pack is detected for disconnection based on the disconnection fault detection circuit, thereby ensuring the effect of disconnection detection of the single cell connection line of the energy storage battery pack.

[0041] In one embodiment, the detection result is further identified and confirmed, specifically: Based on the controller, for the first detection result, by comparing the strength of the insulation signal in several periodic detection results with a set reference strength of the insulation signal, the periodic detection result corresponding to the insulation signal greater than the set reference strength is used as the first detection result finally confirmed; Based on the controller, for the second detection result, the amplitude of the pulse signal is compared with the set reference amplitude of the pulse signal, the pulse signal greater than the set reference amplitude is included in the count, and the pulse signal less than the set reference amplitude is not included in the count, and the counting result of the pulse signal included in the count is used as the final confirmed second detection result.

[0042] The working principle of the above technical solution is: in order to effectively determine the broken wire detection, the present invention also includes identifying and confirming the detection results, specifically: first based on the controller, for the first detection result, by comparing the strength of the insulation signal in several periodic detection results with the set reference strength of the insulation signal, the periodic detection result corresponding to the insulation signal greater than the set reference strength is used as the first detection result finally confirmed; then based on the controller, for the second detection result, by comparing the amplitude of the pulse signal with the set reference amplitude of the pulse signal, the pulse signal greater than the set reference amplitude is included in the count, and the pulse signal less than the set reference amplitude is not included in the count, and the counting result of the pulse signal included in the count is used as the second detection result finally confirmed.

[0043] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the disconnection detection can be effectively determined by identifying and confirming the detection results.

[0044] The energy storage battery management system is designed and implemented based on a disconnection detection method, such as Figure 3 As shown, including: A configuration module is used to configure a detection network and a detection component; the detection network is connected to the detection component; the detection component includes an insulation monitoring controller and a disconnection fault detection circuit; A detection module is used to perform disconnection detection on the high-voltage busbar and detection signal line of the energy storage battery pack and on the single-cell connection line of the energy storage battery pack based on the detection network and detection components to obtain disconnection detection results; The processing and response module is used to perform corresponding processing and response according to the position of the disconnected single-cell connection line based on the disconnection detection result.

[0045] The working principle of the above technical solution is as follows: in order to realize the energy storage battery management system, the present invention is designed and implemented based on a line break detection method, and a configuration module is proposed to configure the detection network and the detection component; the detection network is connected to the detection component; the detection component includes an insulation monitoring controller and a line break fault detection circuit; a detection module is proposed, based on the detection network and the detection component, the high-voltage busbar and the detection signal line of the energy storage battery group are detected for line break, and the single cell connection line of the energy storage battery group is detected for line break to obtain the line break detection result; a processing response module is proposed, based on the line break detection result, according to the position of the interrupted single cell connection line, to perform corresponding processing and response.

[0046] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, effective management of the energy storage battery pack can be achieved through the configuration module, the detection module and the processing and response module.

[0047] In one embodiment, based on the disconnection detection result, corresponding processing is performed according to the position of the disconnected single-cell connection line, including: Configure the circuit breaker protection component connected to the controller; Configure relays, which are connected to the controller and the energy storage battery pack respectively; Based on the disconnection detection result, the controller is used to control the startup of the circuit breaker protection component to handle the situation, or the relay is controlled to close according to the position of the interrupted single-unit connection line.

[0048] The working principle of the above technical solution is: in order to realize corresponding processing and response based on the disconnection detection result and according to the position of the interrupted single-cell connection line, the present invention first configures a circuit breaker protection component connected to the controller; then configures a relay, and the relay is respectively connected to the controller and the energy storage battery pack; finally, based on the disconnection detection result, the controller is used to control the startup of the circuit breaker protection component for processing and response, or the relay is controlled to close according to the position of the interrupted single-cell connection line.

[0049] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by configuring the circuit breaker protection component and the relay connected to the controller, targeted processing and response can be carried out based on the line break detection result and the position of the interrupted single-cell connection line.

[0050] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A disconnection detection method, characterized in that: include: Configure a detection network and detection components; the detection network is connected to the detection components; the detection components include an insulation monitoring controller and a disconnection fault detection circuit; Based on the detection network and detection components, the high-voltage busbar and detection signal line of the energy storage battery pack are detected for disconnection, and the single cell connection line of the energy storage battery pack is detected for disconnection.

2. A disconnection detection method according to claim 1, characterized in that: Configure the detection network and detection components, including: Configure the controllers and network connection components in the detection network; Configure the connection relationship between the controller, network connection components, and detection components.

3. A disconnection detection method according to claim 2, characterized in that: The network connection component includes a wireless network component and an electrical connection component; the wireless network component is used to connect the controller and the insulation monitoring controller; the electrical connection component is used to connect the controller and the disconnection fault detection circuit.

4. A disconnection detection method according to claim 1, characterized in that: The line break fault detection circuit includes a current feedback subcircuit, a pulse modulation subcircuit and a counter; the current feedback subcircuit is connected to the pulse modulation subcircuit; the pulse modulation subcircuit is connected to the counter; the current feedback subcircuit is used to obtain a feedback current signal; the pulse modulation subcircuit is used to generate a pulse signal according to the feedback current signal; the counter is used to count the pulse signal to obtain a counting result.

5. A disconnection detection method according to claim 1, characterized in that: Conduct disconnection detection on the high-voltage busbar and detection signal line of the energy storage battery pack, as well as on the single-cell connection line of the energy storage battery pack, including: Based on the insulation monitoring controller, a high-voltage busbar and a detection signal line of the energy storage battery group are detected for disconnection to obtain a first detection result; Based on the disconnection fault detection circuit, a disconnection detection is performed on the single-cell connection line of the energy storage battery group to obtain a second detection result; The first detection result and the second detection result are summarized to obtain a detection result.

6. A disconnection detection method according to claim 5, characterized in that: Based on the insulation monitoring controller, the high-voltage busbar and the detection signal line of the energy storage battery group are detected for disconnection, and the first detection result is obtained, including: Set the detection cycle; Based on the detection cycle, the controller is used to control the insulation monitoring controller to start, and the high-voltage bus and detection signal line of the energy storage battery group are tested for disconnection to obtain several cycle detection results; After summarizing the detection results of several cycles, a first detection result is obtained.

7. A disconnection detection method according to claim 5, characterized in that: Based on the disconnection fault detection circuit, a disconnection detection is performed on the single-cell connection line of the energy storage battery pack to obtain a second detection result, including: Obtain the position of the single cell connection line of the energy storage battery pack; Based on the current feedback subcircuit in the disconnection fault detection circuit, the connection is made at the monomer connection line position through a plurality of configured independent control switches; Based on the controller, the independent control switch is controlled to open and close through the set control command, so as to control the current feedback subcircuit to receive the feedback current signal, and based on the pulse modulation subcircuit and the counter, the counting result of the pulse signal is obtained; A second detection result is obtained according to the counting result.

8. A disconnection detection method according to claim 5, characterized in that: It also includes identification and confirmation of test results, specifically: Based on the controller, for the first detection result, by comparing the strength of the insulation signal in several periodic detection results with a set reference strength of the insulation signal, the periodic detection result corresponding to the insulation signal greater than the set reference strength is used as the first detection result finally confirmed; Based on the controller, for the second detection result, the amplitude of the pulse signal is compared with the set reference amplitude of the pulse signal, the pulse signal greater than the set reference amplitude is included in the count, and the pulse signal less than the set reference amplitude is not included in the count, and the counting result of the pulse signal included in the count is used as the final confirmed second detection result.

9. An energy storage battery management system, designed and implemented based on a disconnection detection method as claimed in any one of claims 1 to 8, characterized in that: include: Configuration module, used to configure the detection network and detection components; Detecting network connection detection components; the detection components include an insulation monitoring controller and a disconnection fault detection circuit; A detection module is used to perform disconnection detection on the high-voltage busbar and detection signal line of the energy storage battery pack and on the single-cell connection line of the energy storage battery pack based on the detection network and detection components to obtain disconnection detection results; The processing and response module is used to perform corresponding processing and response according to the position of the disconnected single-cell connection line based on the disconnection detection result.

10. The energy storage battery management system according to claim 9, characterized in that: Based on the disconnection detection results, corresponding processing and response are carried out according to the location of the disconnected single-cell connection line, including: Configure the circuit breaker protection component connected to the controller; Configure relays, which are connected to the controller and the energy storage battery pack respectively; Based on the disconnection detection result, the controller is used to control the startup of the circuit breaker protection component to handle the situation, or the relay is controlled to close according to the position of the interrupted single-unit connection line.

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