Liquid leakage monitoring system and control method thereof, battery pack and vehicle
By designing a leak monitoring system without sensors, using the direct connection between the control component and the leak detection component, real-time monitoring of whether the battery pack coolant and electrolyte leak is solved, the problem of inaccurate monitoring in the prior art is significantly improved. Reduces the risk of safety accidents.
Patent Information
- Application Number
- CN202411699023.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-02-18
AI Technical Summary
The prior art cannot accurately monitor whether the battery pack coolant and electrolyte leak, resulting in timely warning, which increases the possibility of battery pack safety accidents.
A liquid leakage monitoring system is designed, which directly connects the control component to the liquid leakage detection component, sends monitoring signals and observes feedback signals to monitor whether liquid leakage is in real time, without setting up sensors or liquid detection elements.
It improves the accuracy of fluid leakage detection, reduces the incidence of battery pack safety accidents, and thus reduces casualties and property losses.
Smart Images
Figure CN119469581A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a leakage monitoring system, a battery pack, a control method for the leakage monitoring system, and a vehicle. Background Art
[0002] With the rapid development of new energy vehicles, lithium-ion batteries, as the core components of new energy vehicles, can be managed by BMS (Battery Management System). In order to ensure the performance of the battery system, battery thermal management design has become very important, and battery packs with liquid cooling function have gradually been developed. Since the coolant and the electrolyte in the battery cell are conductive, once the coolant leaks or the electrolyte leaks inside the battery pack, it is very likely to cause an electrical short circuit between the components inside the battery pack, thereby causing an extremely dangerous safety accident. Therefore, a method is needed to accurately monitor whether the battery coolant and electrolyte are leaking.
[0003] At present, the main method to monitor whether the battery pack coolant and electrolyte are leaking is to rely on sensors or liquid detection elements, etc. However, sensors or liquid detection elements have a certain risk of failure. Therefore, it is impossible to accurately monitor the status of the battery pack throughout its life cycle. There is a phenomenon that monitoring cannot be performed or the monitoring results cannot be reported in time, which increases the possibility of safety accidents in the battery pack. Summary of the invention
[0004] The present application aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present application is to propose a leakage monitoring system, the monitoring system comprising: a leakage detection component, the leakage detection component comprising a first wire and an insulating shell, the first wire is arranged in the insulating shell, and the first wire is used to receive and transmit a monitoring signal; a control component, the control component comprises a signal output interface and a signal input interface, the signal output interface is connected to one end of the first wire, the signal input interface is connected to the other end of the first wire, and the control component is used to output a monitoring signal to the first wire through the signal output interface, and determine the leakage when the feedback signal received by the signal input interface and the monitoring signal output by the signal output interface are inconsistent. The leakage monitoring system of the present application directly connects the control component with the leakage detection component, sends a monitoring signal and observes the feedback signal to monitor whether there is leakage in real time, without setting up sensors or liquid detection elements and other equipment, thereby improving the accuracy of leakage detection, reducing the incidence of battery pack safety accidents, and thus reducing casualties and property losses.
[0005] The second objective of the present application is to provide a battery pack.
[0006] The third objective of the present application is to provide a control method for a liquid leakage monitoring system.
[0007] A fourth object of the present application is to provide a vehicle.
[0008] To achieve the above-mentioned objectives, the first aspect of the present application proposes a liquid leakage monitoring system, which includes: a liquid leakage detection component, which includes a first wire and an insulating shell, the first wire is arranged in the insulating shell, and the first wire is used to receive and transmit a monitoring signal; a control component, which includes a signal output interface and a signal input interface, the signal output interface is connected to one end of the first wire, and the signal input interface is connected to the other end of the first wire, the control component is used to output a monitoring signal to the first wire through the signal output interface, and determine a liquid leakage when the feedback signal received by the signal input interface and the monitoring signal output by the signal output interface are inconsistent.
[0009] According to one embodiment of the present application, the control component is also used to determine that there is no leakage when the feedback signal received by the signal input interface is consistent with the monitoring signal output by the signal output interface.
[0010] According to an embodiment of the present application, the liquid leakage detection component also includes a second wire disposed in the insulating housing, wherein one end and the other end of the second wire are respectively connected to the ground interface of the control component.
[0011] According to an embodiment of the present application, the liquid leakage detection component further includes a third wire disposed in the insulating housing, wherein one end of the third wire is connected to the other end and then grounded.
[0012] According to an embodiment of the present application, the first wire is arranged between the second wire and the third wire, and the first wire, the second wire and the third wire are arranged in parallel in the insulating housing, wherein the first wire, the second wire and the third wire are conductive materials.
[0013] According to one embodiment of the present application, the insulating shell is a flexible film.
[0014] According to one embodiment of the present application, the control component is integrated into a battery management system.
[0015] To achieve the above-mentioned objectives, a second embodiment of the present application proposes a battery pack, comprising the aforementioned leakage monitoring system and a battery module, wherein the leakage detection component in the leakage monitoring system is arranged around the battery module.
[0016] To achieve the above-mentioned objectives, the third aspect embodiment of the present application proposes a control method for a leakage monitoring system, the system includes a leakage detection component, and the method includes: outputting a monitoring signal to the leakage detection component; receiving a feedback signal from the leakage detection component; and determining leakage when the monitoring signal and the feedback signal are inconsistent.
[0017] To achieve the above-mentioned objectives, the fourth aspect of the present application proposes a vehicle, including a memory, a processor, and a control program of a leakage monitoring system stored in the memory and executable on the processor. When the processor executes the control program of the leakage monitoring system, the aforementioned control method of the leakage monitoring system is implemented.
[0018] According to the leakage monitoring system and control method thereof, battery pack and vehicle of the embodiment of the present application, the monitoring system includes: a leakage detection component, the leakage detection component includes a first wire and an insulating shell, the first wire is arranged in the insulating shell, and the first wire is used to receive and transmit a monitoring signal; a control component, the control component includes a signal output interface and a signal input interface, the signal output interface is connected to one end of the first wire, and the signal input interface is connected to the other end of the first wire, and the control component is used to output a monitoring signal to the first wire through the signal output interface, and determine leakage when the feedback signal received by the signal input interface and the monitoring signal output by the signal output interface are inconsistent. The leakage monitoring system of the present application directly connects the control component with the leakage detection component, sends a monitoring signal and observes the feedback signal to monitor whether there is leakage in real time, without the need to set up sensors or liquid detection elements and other equipment, thereby improving the accuracy of leakage detection, reducing the incidence of battery pack safety accidents, and thus reducing casualties and property losses. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic structural diagram of a liquid leakage monitoring system according to some embodiments of the present application;
[0020] Figure 2 is a schematic structural diagram of a liquid leakage monitoring system according to other embodiments of the present application;
[0021] Figure 3 is a schematic diagram of the structure of a battery pack according to some embodiments of the present application;
[0022] Figure 4 is a flow chart of a control method of a liquid leakage monitoring system according to some embodiments of the present application;
[0023] Figure 5 It is a block diagram of a vehicle according to some embodiments of the present application. DETAILED DESCRIPTION
[0024] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.
[0025] The leakage monitoring system and control method thereof, the battery pack and the vehicle according to the embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0026] In some embodiments, reference Figure 1 The monitoring system includes a liquid leakage detection component 1 and a control component 2. The liquid leakage detection component 1 includes a first wire 11 and an insulating shell 12, the first wire 11 is arranged in the insulating shell 12, and the first wire 11 is used to receive and transmit monitoring signals; the control component 2 includes a signal output interface 21 and a signal input interface 22, the signal output interface 21 is connected to one end of the first wire 11, and the signal input interface 22 is connected to the other end of the first wire 11, the control component 2 is used to output a monitoring signal to the first wire 11 through the signal output interface 21, and determine a liquid leakage when the feedback signal received by the signal input interface 22 and the monitoring signal output by the signal output interface 21 are inconsistent.
[0027] Specifically, refer to Figure 1 The leakage detection assembly 1 includes a first wire 11 and an insulating housing 12, wherein the first wire 11 is disposed in the insulating housing 12, wherein the first wire 11 may be a copper wire. The leakage detection assembly 1 may be disposed at a high risk position for leakage, such as a weak structure or an interface.
[0028] The control component 2 includes a signal output interface 21 and a signal input interface 22. The signal output interface 21 is connected to one end of the first wire 11, and the signal input interface 22 is connected to the other end of the first wire 11. The signal output interface 21 of the control component 2 outputs a monitoring signal through the first wire 11. The monitoring signal is transmitted through the first wire 11 to monitor the high-risk position of leakage, that is, the monitoring signal will form a feedback signal after passing through the high-risk position of leakage, and finally received by the signal input interface 22. Since the coolant and the electrolyte in the battery cell are conductive, the first wire 11 is a conductor. If the coolant, the electrolyte, or the coolant and the electrolyte leak, the feedback signal received by the signal input interface 22 will be inconsistent with the monitoring signal sent by the signal output interface 21. In other words, when the feedback signal received by the signal input interface 22 is inconsistent with the monitoring signal output by the signal output interface 21, leakage can be determined.
[0029] For example, it is assumed that the monitoring signal output by the signal output interface 21 is If the feedback signal received by the signal input interface 22 is “_”, that is, the feedback signal received by the signal input interface 22 is inconsistent with the monitoring signal output by the signal output interface 21, liquid leakage is determined.
[0030] The leakage monitoring system of the present application is directly connected to the leakage detection component through a control component, sends a monitoring signal and observes the feedback signal to monitor whether there is leakage in real time. There is no need to set up sensors or liquid detection elements and other equipment, which improves the accuracy of leakage detection and reduces the incidence of battery pack safety accidents, thereby reducing casualties and property losses.
[0031] In some embodiments, reference Figure 1 The control component 2 is also used to determine that there is no leakage when the feedback signal received by the signal input interface 22 is consistent with the monitoring signal output by the signal output interface 21.
[0032] Specifically, refer to Figure 1 If the coolant and electrolyte are not leaking, the feedback signal received by the signal input interface 22 will be consistent with the monitoring signal sent by the signal output interface 21. In other words, when the feedback signal received by the signal input interface 22 is consistent with the monitoring signal output by the signal output interface 21, it can be determined that there is no leakage.
[0033] For example, it is assumed that the monitoring signal output by the signal output interface 21 is If the feedback signal received by the signal input interface 22 is also That is, the feedback signal received by the signal input interface 22 is consistent with the monitoring signal output by the signal output interface 21, and it is determined that there is no leakage.
[0034] In some embodiments, reference Figure 2 The leakage detection component 1 further includes a second wire 13 disposed in an insulating housing (not shown), wherein one end and the other end of the second wire 13 are respectively connected to a grounding interface (not shown) of the control component 2. The leakage detection component 1 further includes a third wire 14 disposed in an insulating housing (not shown), wherein one end and the other end of the third wire 14 are connected and then grounded.
[0035] Specifically, the liquid leakage detection component 1 further includes a second wire 13 and a third wire 14, wherein the second wire 13 and the third wire 14 may be copper wires. One end and the other end of the second wire 13 are respectively connected to the ground interface of the control component 2, and one end and the other end of the third wire 14 are connected to the ground, that is, the second wire 13 and the third wire 14 are both ground wires. In this way, by increasing the number of ground wires, the stability of the monitoring signal transmission can be improved, and the signal loss can be prevented, thereby improving the accuracy of liquid leakage detection.
[0036] In some embodiments, continue to refer to Figure 2The first wire 11 is disposed between the second wire 13 and the third wire 14, and the first wire 11, the second wire 13 and the third wire 14 are disposed in parallel in the insulating housing, wherein the first wire 11, the second wire 13 and the third wire 14 are conductive materials.
[0037] Specifically, the first wire 11, the second wire 13 and the third wire 14 are conductive materials, for example, the first wire 11, the second wire 13 and the third wire 14 can be copper wires, and no specific restrictions are made here. Since the coolant and the electrolyte are conductive, the first wire 11, the second wire 13 and the third wire 14 are all conductive materials. Therefore, when the coolant, the electrolyte or the coolant and the electrolyte leak, the first wire 11, the second wire 13 and the third wire 14 will be short-circuited, thereby affecting the monitoring signal transmitted by the first wire 11, so that the feedback signal received by the signal input interface 22 and the monitoring signal output by the signal output interface 21 are inconsistent. For example, if the first wire 11 is short-circuited with the second wire 13, the first wire 11 is short-circuited with the third wire 14, or the first wire 11, the second wire 13 and the third wire 14 are short-circuited, it will cause the feedback signal received by the signal input interface 22 and the monitoring signal output by the signal output interface to be inconsistent.
[0038] It should be noted that the distance between the first wire 11 and the second wire 13 and the distance between the first wire 11 and the third wire 14 need to be greater than the first preset distance and less than the second preset distance, wherein the first preset distance and the second preset distance are determined according to actual conditions, for example, the first preset distance can be 0, and the second preset distance is as small as possible according to the size of the leakage detection component 1. In other words, even if the amount of coolant, electrolyte, or coolant and electrolyte leakage is relatively small, the first wire 11 and the second wire 13 will be short-circuited, or the first wire 11 and the third wire 14 will be short-circuited. In this way, the accuracy and sensitivity of leakage detection can be improved.
[0039] In some embodiments, reference Figure 1 , the insulating shell 12 is a flexible film.
[0040] Specifically, the insulating shell 12 can be an insulating flexible film, such as a PC (Polycarbonate) film. In other words, the leakage detection component 1 can be bent and can be arranged at high-risk locations for leakage such as weak structures or interfaces, such as the inlet and outlet of the liquid cooling plate or the bottom of the module, or it can be arranged in a large area around the integrated liquid cooling system. In this way, the requirements for the layout space of the leakage detection component can be reduced, the contact area of the conductor can be increased, and the monitoring sensitivity can be improved; it can also be arranged at multiple leakage risk points at the same time to solve the problem of missed or delayed fault reporting.
[0041] In some embodiments, the control component is integrated into the battery management system.
[0042] Specifically, the control component is integrated into the battery management system, that is, the battery management system sends and monitors specific monitoring signals. In this way, by sending and monitoring specific monitoring signals, signal interference can be avoided to a certain extent, reducing the possibility of misjudgment; in addition, when leakage is confirmed, the battery management system will also issue a leakage fault reminder to check the entire vehicle.
[0043] In summary, the leakage monitoring system of the present application is directly connected to the leakage detection component through the control component, sends monitoring signals and observes feedback signals to monitor in real time whether the coolant and electrolyte are leaking. There is no need to set up sensors or liquid detection elements and other equipment, which improves the accuracy of leakage detection and reduces the incidence of battery pack safety accidents, thereby reducing casualties and property losses; the leakage detection component includes a first wire, a second wire and a third wire arranged on a flexible film, which has a simple structure and is easy to arrange. It can be arranged at high-risk locations for leakage such as weak structures or interfaces, or it can be arranged over a large area to surround the integrated liquid cooling system. It can also be arranged at multiple leakage risk points at the same time. In this way, leakage can be reduced. The requirements for the layout space of the detection components increase the contact area of the conductor, improve the monitoring sensitivity, and can also solve the problem of missed or delayed fault reporting; the second wire and the third wire are both ground wires, and the stability of the monitoring signal transmission can be improved by increasing the number of ground wires to prevent signal loss, thereby further improving the accuracy of leakage detection; setting the distance between the first wire 11 and the second wire and the distance between the first wire 11 and the third wire as small as possible can improve the accuracy and sensitivity of leakage detection; in addition, sending and monitoring specific monitoring signals through the battery management system can avoid signal interference to a certain extent, reduce the possibility of misjudgment, and affect the false alarm or missed alarm of the battery management system.
[0044] Corresponding to the above embodiments, the present application also proposes a battery pack.
[0045] In some embodiments, reference Figure 3 The battery pack 100 includes the aforementioned leakage monitoring system and a battery module 3 , wherein the leakage detection component 1 in the leakage monitoring system is arranged around the battery module 3 .
[0046] Corresponding to the above embodiments, the present application also proposes a control method for a liquid leakage monitoring system.
[0047] In some embodiments, the liquid leakage monitoring system includes: a liquid leakage detection component. Figure 4 The control method of the liquid leakage monitoring system of the embodiment of the present application may include the following steps:
[0048] S110, outputting a monitoring signal to the liquid leakage detection component.
[0049] S120, receiving a feedback signal from the liquid leakage detection component.
[0050] S130: When the monitoring signal and the feedback signal are inconsistent, liquid leakage is determined.
[0051] Corresponding to the above embodiments, the present application also proposes a vehicle.
[0052] See also Figure 5 As shown, the vehicle 400 of the present application includes a memory 410, a processor 420, and a control program of the leakage monitoring system stored in the memory 410 and executable on the processor 420. When the processor executes the control program of the leakage monitoring system, the aforementioned control method of the leakage monitoring system is implemented.
[0053] It should be pointed out that the above-mentioned explanation of the embodiments and beneficial effects of the control method of the leakage monitoring system are also applicable to the vehicle of the embodiment of the present application. In order to avoid redundancy, they will not be elaborated here.
[0054] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.
[0055] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.
[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0058] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0059] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A liquid leakage monitoring system, characterized in that: The monitoring system comprises: A liquid leakage detection component, the liquid leakage detection component comprising a first wire and an insulating shell, the first wire is arranged in the insulating shell, and the first wire is used to receive and transmit a monitoring signal; A control component, the control component includes a signal output interface and a signal input interface, the signal output interface is connected to one end of the first wire, and the signal input interface is connected to the other end of the first wire, the control component is used to output the monitoring signal to the first wire through the signal output interface, and determine leakage when the feedback signal received by the signal input interface and the monitoring signal output by the signal output interface are inconsistent.
2. The liquid leakage monitoring system according to claim 1, characterized in that: The control component is also used to determine that there is no leakage when the feedback signal received by the signal input interface is consistent with the monitoring signal output by the signal output interface.
3. The liquid leakage monitoring system according to claim 1, characterized in that: The liquid leakage detection component also includes a second wire arranged in the insulating shell, wherein one end and the other end of the second wire are respectively connected to the ground interface of the control component.
4. The liquid leakage monitoring system according to claim 3, characterized in that: The liquid leakage detection assembly further includes a third wire disposed in the insulating housing, wherein one end of the third wire is connected to the other end and then grounded.
5. The liquid leakage monitoring system according to claim 4, characterized in that: The first wire is arranged between the second wire and the third wire, and the first wire, the second wire and the third wire are arranged in parallel in the insulating housing, wherein the first wire, the second wire and the third wire are conductive materials.
6. The liquid leakage monitoring system according to claim 1, characterized in that: The insulating shell is a flexible film.
7. The liquid leakage monitoring system according to claim 1, characterized in that: The control component is integrated in the battery management system.
8. A battery pack, characterized in that: It comprises a leakage monitoring system and a battery module as described in any one of claims 1 to 7, wherein the leakage detection component in the leakage monitoring system is arranged around the battery module.
9. A control method for a liquid leakage monitoring system, characterized in that: The system includes a liquid leakage detection component, and the method includes: Outputting a monitoring signal to the liquid leakage detection component; receiving a feedback signal from the liquid leakage detection component; When the monitoring signal and the feedback signal are inconsistent, liquid leakage is determined.
10. A vehicle, characterized in that: The invention comprises a memory, a processor and a control program of a liquid leakage monitoring system which is stored in the memory and can be run on the processor. When the processor executes the control program of the liquid leakage monitoring system, the control method of the liquid leakage monitoring system according to any one of claim 9 is implemented.