A liquid cooling control method and system for preventing leakage of old batteries based on double-cavity isolation

Abstract

The present application relates to the technical field of battery leakage isolation, and particularly relates to a battery leakage prevention and liquid cooling control method and system based on double-cavity isolation. The method comprises the following steps: installing an electrically conductive liquid leakage sensor at the middle section of the diversion chute at the bottom of the battery cabin and the inlet interface of the cold plate, triggering liquid leakage detection by using the electrical conductivity of electrolyte in the liquid leakage, and realizing real-time communication between the sensor and the control system; when liquid leakage is detected, the control system starts a three-layer response within a preset time; real-time monitoring of the liquid leakage signal is performed to determine whether the liquid leakage signal is triggered; differential signal transmission is performed on the liquid leakage signal, and the liquid leakage signal is controlled and analyzed; positioning and control are performed according to the control analysis result, a mapping table is queried, the cold plate pump is controlled, and the exhaust fan is started; according to the liquid leakage condition of the liquid leakage signal, an alarm is given, and the alarm is transmitted to the cloud for early warning. The present application can complete the adaptation and upgrade of the cooling system by modifying the battery body, and significantly reduces the technical iteration cost in the old battery scenario.

Description

Technical Field

[0001] This invention relates to the field of battery leakage isolation technology, and in particular to a liquid cooling control method and system for preventing leakage in old batteries based on dual-chamber isolation. Background Technology

[0002] With the rapid popularization of new energy vehicles, energy storage systems, and portable electronic devices, the safety and reliability of batteries, as the core energy supply unit, after long-term service has become a key bottleneck restricting the industry's development. Among them, "old batteries" with a service life of more than 3-5 years and a cycle life decay of less than 80% face significant leakage and related safety risks due to the irreversible aging of internal materials and structures. Existing battery thermal management solutions, especially mainstream liquid cooling systems, have obvious technical shortcomings in preventing leakage and protecting the safety of old batteries, making it difficult to meet the needs of practical applications.

[0003] After prolonged use, the sealant on the battery casing hardens and cracks, the safety valve loses its elasticity, and the connection between the terminals and the casing loosens, leading to electrolyte leakage. As a core component of thermal management, the liquid cooling plate's welds are susceptible to damage from mechanical vibration (20~200Hz) or thermal cycling stress (-40℃). Cracks are easily generated at 85℃, and the aluminum alloy matrix is ​​prone to cracking. Pitting corrosion can occur in coolants with a concentration >50 ppm, with a corrosion rate reaching 0.1 mm / year. As batteries age, their internal resistance increases, and heat generation becomes concentrated during charging and discharging. If traditional liquid cooling systems cannot dynamically adjust the flow rate, the temperature difference between cells can exceed 5°C, causing localized overheating and expansion, further damaging the sealing structure. After prolonged use, the electrolyte may dry out or its composition may change, leading to a decrease in conductivity. Traditional conductive leakage sensors may misjudge and delay warnings. Simultaneously, the electrolyte can swell the sealing ring (e.g., EPDM has a volume expansion rate >15% in ethylene glycol-based coolants), exacerbating the risk of seal failure.

[0004] Prior art 1, Chinese Patent Application No. 202510351107.9, discloses a battery pack and power supply device, belonging to the field of battery technology. It includes multiple individual cells and a liquid cooling assembly. The multiple individual cells are arranged along a first direction. Each individual cell includes a shell and an insulating layer. The shell has a first surface intersecting the first direction and a second surface connecting to the first surface. The insulating layer covers the shell and has a first end and a second end. The first end and the second end overlap to form an overlapping area, which covers the first surface. The liquid cooling assembly covers the second surface. With this arrangement, the liquid cooling assembly is positioned on the second surface, creating a misalignment with the overlapping area of ​​the insulating layer. If the liquid cooling assembly leaks, the coolant must first reach the first surface through the gap between the liquid cooling assembly and the shell, and then penetrate the double-layer overlapping area of ​​the insulating layer. Although this significantly extends the penetration path, effectively reducing the possibility of liquid penetrating into the shell, thereby reducing the risk of shell corrosion and insulation failure, and improving the safety performance of the individual cells, long-term charge-discharge cycles cause the positive electrode active material particles to crack and fall off, and the negative electrode lithium dendrites to grow and pierce the separator, leading to internal short circuits and generating localized high temperatures, damaging the battery's sealing structure.

[0005] Prior art two, Chinese patent application number: 202411657482.8, relates to the field of energy storage technology and discloses an immersion liquid-cooled energy storage system. This invention features a liquid storage tank with multiple drainage holes above the battery cluster units. A coolant outlet pipe outside the energy storage tank delivers coolant to the storage tank via a cooling pipe. The coolant in the storage tank flows downwards through the drainage holes under gravity, cooling the battery cluster units. In this way, the coolant can accurately cool the battery cluster units, reduce dead zones inside the energy storage tank, and target areas with concentrated heat generation, enhancing temperature uniformity. Although the coolant flows and adheres to the surface of the battery cluster unit under the action of gravity, it does not require the coolant to fill the energy storage tank like traditional immersion liquid cooling, which can reduce the amount of coolant used; however, the electrolyte decomposes under high temperature and high voltage conditions, and the generated gas increases the internal pressure of the battery. At the same time, the casing develops fatigue cracks after long-term vibration and temperature cycling, and the sealant loses its elasticity due to aging, causing the electrolyte to seep out from the gaps. Furthermore, the hydrofluoric acid contained in the seeping electrolyte will further corrode the casing and seals.

[0006] Prior art 3, Chinese patent application number: 202411893178.3, belongs to the field of energy storage equipment technology, specifically relating to a side-cooled liquid energy storage system, including a cabinet, a liquid cooling unit and multiple battery packs. The multiple battery packs are stacked in the upper part of the cabinet, and the liquid cooling unit is installed in the lower part of the cabinet. The cabinet has an inlet pipe and an outlet pipe on both sides that are connected to the liquid cooling unit. The battery pack includes a housing, cooling pipes and multiple battery modules. The multiple battery modules are installed in the housing. The cooling pipes are arranged around each battery module one by one and contact both sides of each battery module. Both ends of each cooling pipe extend out of the corresponding housing and are connected to the inlet pipe and the outlet pipe, respectively. Although the solution simplifies installation and reduces the risk of leakage, makes it less likely for the cooling pipes inside the battery pack to leak, and increases the inlet water temperature, which can reduce the risk of condensation and avoid cell short circuits and casing corrosion caused by condensation, long-term charge-discharge cycles cause the positive electrode active material particles to crack and fall off, and the negative electrode lithium dendrites to grow and pierce the separator, causing internal short circuits and generating local high temperatures, which damages the battery's sealing structure.

[0007] Current technologies 1, 2, and 3 suffer from localized high temperatures and loss of elasticity in the sealant due to aging. Therefore, this invention provides a liquid cooling control method and system for preventing leakage in older batteries based on dual-chamber isolation. Summary of the Invention

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] One aspect of the present invention provides a liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation, comprising the following steps:

[0010] When a leak is detected, the control system initiates a three-layer response within a preset time; it triggers real-time monitoring to determine whether a leak signal has been triggered; if the leak signal has not been triggered, monitoring continues; if the leak signal has been triggered, the leak signal is transmitted and processed.

[0011] The leakage signal is transmitted differentially and analyzed for control purposes. Based on the analysis results, the location and control are performed, the mapping table is queried, the cold plate pump is controlled, and the exhaust fan is turned on. An alarm is triggered based on the leakage status of the leakage signal, and the data is transmitted to the cloud for early warning.

[0012] In one optional implementation, the first layer shuts down the corresponding cold plate circulation pump within 0-100ms. The circulation pump uses a DC brushless motor with a Hall sensor. The controller cuts off the power and sends a braking command through a solid-state relay with a response time of no more than 10ms, causing the pump impeller to stop rotating within 50ms to block the flow of coolant. The second layer starts the exhaust fan on top of the battery compartment within 50-300ms. The exhaust fan is a miniature axial flow fan with a speed of 3000rpm. The controller drives it through a PWM signal to quickly discharge electrolyte vapor in the compartment at an airflow of no less than 5L / min to reduce the risk of combustion and explosion. The third layer triggers a positioning alarm within 100-800ms. The LED screen and buzzer are controlled by independent drive circuits. The controller outputs high and low level signals to directly activate them. The screen refresh time is no more than 200ms, and the buzzer oscillation time is no more than 50ms.

[0013] In one optional implementation, the process of locating and controlling based on the control analysis results includes the following steps:

[0014] The signal parsing system receives differential signals and decodes them to separate the signal source identifier and signal strength information, forming a preliminary leak event descriptor.

[0015] The signal source identifier in the initial leakage event descriptor is matched and queried with the mapping table to convert the abstract conductive leakage sensor ID into a specific physical spatial location identifier, and at the same time, the execution device number bound to the physical spatial location is obtained, thus completing the location mapping from signal to space.

[0016] Based on the location mapping results, two concurrent deterministic control commands are generated;

[0017] The first instruction targets the cold plate circulation pump corresponding to the located area, combining signal strength information extracted from the initial leakage event descriptor. If the signal strength exceeds the preset high-risk threshold, the instruction will include the highest priority emergency stop command, which will be directly issued through a solid-state relay path with extremely short response time, achieving rapid power-off and braking in the first layer of response. The second instruction targets the exhaust fan corresponding to the located area, generating a full-speed start command, which is issued through the PWM drive circuit to achieve high-speed ventilation in the second layer of response. The two deterministic control instructions are sent to the corresponding cold plate circulation pump controller and exhaust fan controller, respectively, driving the physical actuators to complete the rapid response action.

[0018] In one optional implementation, the process of completing the location mapping from signal to space includes the following steps:

[0019] From the initial leak event descriptor obtained, the signal source identifier contained within it is extracted. It is a unique code pre-programmed into the sensor and represents only a logical entity.

[0020] The mapping table describes the physical coordinates of all conductive leakage sensors under the dual-cavity isolation structure of the battery compartment, the fluid flow area they monitor, and the topological relationship network of the liquid cooling circulation subsystem and ventilation subsystem to which the area belongs;

[0021] The received signal source identifier is used as the query key to match in the mapping table. After a successful match, three sets of output information are read from the mapping table at the same time: the first set is the physical coordinates of the conductive leakage sensor, which are converted into spatial location codes to form a physical spatial location identifier; the second set is the unique cold plate circulation pump number corresponding to the liquid cooling circulation subsystem to which the coordinate point belongs; and the third set is the unique exhaust fan number corresponding to the ventilation subsystem to which the coordinate point belongs.

[0022] In one alternative implementation, the matching process in the mapping table includes the following steps:

[0023] The extracted signal source identifier, whose binary encoding structure enters the preprocessing unit of the identifier hierarchical indexer; the preprocessing unit parses its high-order part into a region segment code and its low-order part into a device sequence code according to the identifier's encoding rules.

[0024] The region segment code is used to locate the corresponding physical partition storage block in the mapping table in the first-level index; based on the address mapping mechanism, the value of the region segment code directly points to the starting address of a certain partition on the storage medium;

[0025] After locating the correct physical partition storage block, the device serial number is used as the key for the second-level matching; the device serial number is compared bit by bit with the sensor identifier stored in each entry within the block;

[0026] When the bit-by-bit comparison results are completely consistent, the match is successful; the physical address of the entry in the storage block is locked, and a continuous data block is read from this locked address unit; the data block contains pre-stored triplet information: sensor physical coordinate data, the bound cold plate circulation pump number, and the bound exhaust fan number.

[0027] In one optional implementation, the preprocessing unit's process based on the identifier's encoding rules includes the following steps:

[0028] The signal source identifier is sent as a complete binary encoded sequence to the input register of the preprocessing unit. The rules for constructing the binary encoded sequence are defined during initialization by a data structure called a static configuration descriptor, which specifies the total bit width of the signal source identifier, the start bit and bit width of the region segment code, and the start bit and bit width of the device sequence code.

[0029] The continuous binary encoded sequence is physically divided into two independent bit segments; the first bit segment consists of a continuous number of bits starting from the most significant bit, which is output and named the region segment code; the second bit segment consists of all the remaining bits, which is output and named the device sequence code.

[0030] Through a level signal recombination operation based on predefined rules, the signal source identifier is parsed into two independent coded segments with different functional meanings: a region segment code and a device sequence code; the coded segments provide input key values ​​for hierarchical index queries.

[0031] In one alternative implementation, the process of physically dividing a continuous binary encoded sequence into two independent bit segments includes the following steps:

[0032] The complete binary encoded sequence stored in the input register has its output lines connected in parallel to two independent physical selector arrays; the conduction state of the two physical selector arrays is pre-configured and controlled by the region segment code bit width parameter defined in the static configuration descriptor;

[0033] The first selector array is configured to allow a consecutive number of bits, starting from the most significant bit, to pass through. The allowed signal lines are physically aggregated onto a new set of output lines, and the new parallel output signals are defined as the region segment code. Meanwhile, the second selector array is configured to complement the first set, allowing only the remaining number of bits to pass through. It is also aggregated onto another set of independent output lines, and the output signals are defined as the device sequence code.

[0034] Through a physical signal routing mechanism based on pre-configured parameters, a binary coded sequence is synchronously and physically separated into two independent data paths with clear boundaries and functions; the area segment code and the device sequence code are latched into their respective output registers.

[0035] In one optional implementation, the process pre-configured and controlled by the region segment code bit width parameter defined in the static configuration descriptor includes the following steps:

[0036] The region segment code bit width parameter defined in the static configuration descriptor is written into a bit width configuration register through a hardware configuration port loaded during system initialization; the output value of the bit width configuration register is sent as a set of parallel binary signals representing the bit width value to the combinational logic circuit of the array control word generation logic.

[0037] The array control word generation logic performs decoding operations based on the input bit width value signal to generate two sets of control word signals of length corresponding to each bit position of the input register. The level state of each bit of the first set of control word signals is used to indicate whether the signal of the corresponding bit in the input register belongs to the category of the area segment code. The second set of control word signals is the logical inversion of the first set and is used to indicate whether the signal of its corresponding bit belongs to the category of the device sequence code.

[0038] Two sets of control word signals, as the conduction control inputs of the physical selector array, are respectively connected to the control terminals of each selection unit of the two selector arrays; each selection unit determines whether to transmit the signal level from the corresponding bit of the input register to its output terminal according to the level of its control terminal input.

[0039] In one optional embodiment, conductive leakage sensors are installed at the middle section of the bottom guide trough of the battery compartment and at the cold plate inlet interface. The leakage detection is triggered by the conductivity of the electrolyte in the leakage liquid, and the sensors communicate with the control system in real time.

[0040] Another aspect of the present invention provides a liquid cooling control system for preventing leakage of old batteries based on dual-cavity isolation. The method for preventing leakage of old batteries based on dual-cavity isolation includes: a leakage collection tank, a heat-conducting wall surface, a two-phase cold plate, and an old battery.

[0041] The old batteries are enclosed in two separate battery compartments; the bottom of the battery compartment is equipped with a leakage collection tank and the outside of the battery compartment is equipped with a heat-conducting wall; two-phase cold plates are installed on both sides of the heat-conducting wall.

[0042] This invention achieves highly efficient thermal resistance control, synergistically ensuring protection and heat dissipation: Utilizing a composite structure of aluminum nitride ceramic separators and silicone thermal pads, it strengthens leakage isolation while maintaining stable low interfacial thermal resistance through micro-protrusion contact and elastic pressing design. This preserves the high efficiency of two-phase cold plate phase change heat dissipation while avoiding interference from the heat transfer path by the protective structure, achieving a dynamic balance between safety and efficiency. A modular adaptive architecture enhances compatibility: The modular design of independent sealed chambers, replaceable filter modules, and flexible connection components allows for flexible adaptation to battery modules with different aging levels. Cooling system upgrades can be completed without modifying the battery itself, significantly reducing the technical iteration costs in older battery scenarios. Attached Figure Description

[0043] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0044] Figure 1This is a flowchart of the liquid cooling control method for preventing leakage of old batteries based on dual-cavity isolation, as provided in Embodiment 1 of the present invention.

[0045] Figure 2 This is a schematic diagram of the liquid cooling control method for preventing leakage of old batteries based on dual-cavity isolation provided in Embodiment 1 of the present invention;

[0046] Figure 3 This is a process diagram of triggering leak detection using the conductivity of electrolytes in the leaking liquid, as provided in Embodiment 2 of the present invention.

[0047] Figure 4 This is a process diagram of positioning and control based on control analysis results provided in Embodiment 4 of the present invention;

[0048] Figure 5 This is a schematic diagram of the liquid cooling control system for preventing leakage of old batteries based on dual-cavity isolation, provided in Embodiment 10 of the present invention.

[0049] Figure 6 This is a control flowchart of the liquid cooling control system for preventing leakage of old batteries based on dual-cavity isolation, provided in Embodiment 10 of the present invention.

[0050] Figure 7 This provides a three-layer response diagram of the leakage sensing for a liquid cooling control system for preventing leakage in old batteries based on dual-cavity isolation, as shown in Embodiment 10 of the present invention.

[0051] Figure 8 A block diagram of the electronic device provided by the present invention;

[0052] Figure 9 A block diagram of a computer-readable storage medium provided for this invention;

[0053] Reference numerals: 1. Leakage collection tank; 2. Heat-conducting wall; 3. Two-phase cold plate; 4. Old battery; 5. Storage medium; 6. Data bus; 7. Input / output bus / external bus / device bus; 8. Display; 9. Input / output device; 10. Computer-readable instructions; 11. Computer-readable storage medium; 12. Central processing unit / microprocessor / main control chip. Detailed Implementation

[0054] The technical solutions of the present invention will now be described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0055] Hereinafter, the terms "first," "second," etc., are used for descriptive convenience only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0056] In this invention, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed mechanical connection, a detachable mechanical connection, or an integral part; or, "connection" can be a direct connection or an indirect connection through an intermediate medium. Furthermore, unless otherwise explicitly specified and limited, the term "coupling" should be interpreted broadly. For example, "coupling" can be a direct electrical connection, such as physical contact and electrical conduction between two components; it can also be understood as an electrical connection between different components in a circuit structure through physical lines capable of transmitting electrical signals, such as copper foil or wires on a printed circuit board (PCB), to transmit electrical signals; or, "coupling" can be an indirect electrical connection between two components through an intermediate medium; or, "coupling" can be an electrical connection between two components in a non-contact manner, such as an electrical connection between two components using capacitive coupling to transmit electrical signals.

[0057] In this embodiment of the invention, directional terms such as "up," "down," "left," and "right" may be defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms can be relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0058] Key technical features of the embodiments of the present invention are as follows: Conductive leakage sensors, triggered by the conductivity of the leaking electrolyte, are installed in the middle section of the bottom guide channel of the battery compartment and at the cold plate inlet interface. The sensors communicate with the control system in real time, establishing a foundation for leakage monitoring. If leakage is detected, the control system initiates a three-layer response within a preset time. First, it determines whether a leakage signal has been triggered through real-time monitoring. If not, it continues monitoring; if triggered, it transmits and processes the signal. The leakage signal undergoes differential transmission and control analysis. Based on the analysis results, it locates and controls the leak, queries a mapping table to adjust the cold plate pump and turn on the exhaust fan, and simultaneously triggers an alarm based on the leakage situation, transmitting the information to the cloud for early warning.

[0059] Example 1:

[0060] like Figure 1As shown, this embodiment of the invention provides a liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation, comprising the following steps:

[0061] Step S100: Install conductive leakage sensors at the middle section of the bottom guide chute of the battery compartment and at the cold plate inlet interface. The leakage detection is triggered by the conductivity of the electrolyte in the leakage liquid. The sensors communicate with the control system in real time.

[0062] Step S200: When leakage is detected, the control system initiates a three-layer response within a preset time; triggers real-time monitoring to determine whether a leakage signal has been triggered; if it is determined that the leakage signal has not been triggered, monitoring continues; if it is determined that the leakage signal has been triggered, the leakage signal is transmitted and processed.

[0063] The system consists of three layers: First, the corresponding cold plate circulation pump shuts down within 0-100ms. The circulation pump uses a DC brushless motor with a Hall sensor. The controller directly cuts off the power and sends a braking command via a solid-state relay with a response time ≤10ms, causing the pump impeller to stop rotating within 50ms to block the coolant flow. Second, the exhaust fan on top of the battery compartment starts within 50-300ms. This exhaust fan is a miniature axial flow fan with a speed of 3000rpm. The controller drives it via a PWM signal to reach its rated speed within 50ms, quickly expelling electrolyte vapor from the compartment at a flow rate ≥5L / min to reduce the risk of combustion and explosion. Third, the positioning alarm is triggered within 100-800ms. The LED screen and buzzer are controlled by independent drive circuits. The controller outputs high and low level signals to directly activate them. The screen refresh time is ≤200ms, and the buzzer oscillation time is ≤50ms, ensuring that all responses are completed within 800ms.

[0064] Step S300: Transmit the leakage signal differentially and analyze the leakage signal for control; locate and control the leakage based on the control analysis results, query the mapping table, control the cold plate pump and turn on the exhaust fan; set an alarm based on the leakage status of the leakage signal and transmit it to the cloud for early warning.

[0065] The specific principle in the above embodiments is as follows: Figure 2As shown, in this embodiment, conductive leak sensors are installed at the middle section of the bottom guide channel of the battery compartment and at the cold plate inlet interface. These sensors utilize the conductivity of the leaking electrolyte to trigger detection. The sensors communicate with the control system in real time, establishing a foundation for leak monitoring. If a leak is detected, the control system initiates a three-layer response within a preset time. First, it determines whether a leak signal has been triggered through real-time monitoring. If not, it continues monitoring; if triggered, it transmits and processes the signal. The leak signal undergoes differential transmission and control analysis. Based on the analysis results, it locates and controls the leak, queries the mapping table to adjust the cold plate pump and turn on the exhaust fan, and simultaneously triggers an alarm based on the leak situation, transmitting the information to the cloud for early warning. A hierarchical risk defense system is constructed to achieve zero cross-contamination: through the physical barrier of double-cavity isolation, the material protection of the anti-corrosion coating, and the stress buffer of elastic connections, a multi-layer protection network is formed, blocking the contact path between the leaking liquid and the coolant from the source. At the same time, the intelligent monitoring system enables immediate response to leaks, ensuring that the cooling system remains in a clean operating state for a long time. This embodiment achieves efficient thermal resistance control, synergistically ensuring protection and heat dissipation: It employs a composite structure of aluminum nitride ceramic separator and silicone thermal pad, which strengthens leakage isolation while using micro-protrusion contact and elastic pressing design to stably control the interface thermal resistance at a low level. This retains the high efficiency of two-phase cold plate phase change heat dissipation while avoiding interference from the protective structure on the heat transfer path, achieving a dynamic balance between safety and performance. A modular adaptive architecture enhances compatibility: The modular design of independent sealed chambers, replaceable filter modules, and flexible connection components allows for flexible adaptation to battery modules with different aging levels. Cooling system upgrades can be completed without modifying the battery itself, significantly reducing the technical iteration costs in older battery scenarios.

[0066] Example 2:

[0067] like Figure 3 As shown, based on Example 1, the process of triggering leakage detection using the conductivity of the electrolyte in the leaking liquid in step S100 of this embodiment of the invention includes the following steps:

[0068] Step S101: The conductive leakage sensor is equipped with a conductivity bridge unit based on micro-pitch electrode pairs. The conductivity bridge unit consists of two sets of surface-treated inert metal electrodes. The spacing between the inert metal electrodes is controlled at the micrometer level to form an asymmetric electric field distribution. In the absence of leakage, the medium between the inert metal electrodes is air, and the bridge outputs a reference balance signal.

[0069] Step S102: When the battery leaks, the electrolyte-containing liquid flows along the guide channel to the installation position of the conductive leakage sensor; the electrolyte liquid bridges the micro-pitch electrode pair, causing a sudden change in the electric field distribution, resulting in a step change in conductivity of the bridge output, which is captured by the built-in signal conditioning. By comparing the current conductivity value with the preset threshold in real time, the original leakage sensing signal is generated.

[0070] Step S103: The original leakage sensing signal is sent to a signal processor with adaptive filtering function. The instantaneous interference is eliminated by the sliding window algorithm, and the conductivity abnormal signal that lasts for more than the critical duration is extracted. The confirmed valid signal is converted into a standard digital pulse and transmitted to the control system through the isolated CAN bus.

[0071] In the above embodiments, this embodiment achieves highly sensitive electrolyte liquid bridging detection through the asymmetric electric field formed by micro-pitch electrode pairs. When leakage occurs, the step conductivity change caused by the sudden change in electric field induced by the electrolyte is accurately captured. After adaptive filtering and a sliding window algorithm to eliminate interference, a stable and reliable standard digital signal is finally output. It can not only keenly detect micro-level leakage but also effectively resist environmental interference, providing reliable early warning of liquid electrolyte penetration for battery systems through real-time digital pulses.

[0072] Example 3:

[0073] Based on Example 2, the process of eliminating transient interference using a sliding window algorithm in step S103 of this embodiment of the invention includes the following steps:

[0074] Step S1031: The original leakage sensing signal captured by signal conditioning is used as a set of discrete conductivity sampling values ​​that vary with time and is entered into an observation window of fixed time length, i.e., a sliding window.

[0075] Step S1032: The original leakage sensing signal sampling value sequence within the sliding window is used to form a dynamically changing reference level by taking the median of all sampling values ​​within the sliding window based on the sequence statistics and passing through the dynamic background baseline. Each real-time sampling value within the sliding window is compared with the reference level. If the difference exceeds the preset sensitivity threshold, the sampling point is marked as an instantaneous anomaly.

[0076] Step S1033: Simultaneously monitor the total frequency of instantaneous anomalies within the current sliding window, and the duration of the subsequence formed by the latest batch of instantaneous anomalies; only when both the frequency density and duration of anomalies exceed the critical threshold preset according to the electrolyte fluid characteristics is it determined that a valid leakage event signal has exceeded the critical duration; a valid leakage event signal is confirmed by the persistence criterion.

[0077] In the above embodiments, the sliding window algorithm constructs a reference level that adapts to environmental changes through a dynamic background baseline (S1031) and real-time median filtering technology, effectively distinguishing between real leakage signals and transient interference (S1032). Combined with the dual criteria of anomaly frequency density and duration (S1033), it acts like a "smart screen" for the system, filtering out false triggers caused by random fluctuations while ensuring reliable capture of continuous electrolyte leakage, ultimately achieving accurate determination and stable output of leakage events under interference conditions.

[0078] Example 4:

[0079] like Figure 4 As shown, based on Example 1, the process of locating and controlling according to the control analysis result in step S300 of this embodiment of the invention includes the following steps:

[0080] Step S301: The signal parsing system receives the differential signal and decodes it to separate the signal source identifier and signal strength information, forming a preliminary leak event descriptor;

[0081] Step S302: Match the signal source identifier in the preliminary leakage event descriptor with the mapping table, convert the abstract conductive leakage sensor ID into a specific physical spatial location identifier, and at the same time obtain the execution device number bound to the physical spatial location to complete the positioning mapping from signal to space.

[0082] Step S303: Based on the location mapping result, two concurrent deterministic control commands are generated. The first command targets the cold plate circulation pump corresponding to the located area, combining the signal strength information extracted from the preliminary leak event descriptor. If the signal strength exceeds the preset high-risk threshold, the command will include the highest priority emergency stop command, which is directly issued through a solid-state relay path with extremely short response time to achieve rapid power-off and braking in the first layer of response. The second command targets the exhaust fan corresponding to the located area, generating a full-speed start command, which is issued through the PWM drive circuit to achieve high-speed ventilation in the second layer of response. The two deterministic control commands are sent to the corresponding cold plate circulation pump controller and exhaust fan controller, respectively, to drive the physical actuators to complete precise and rapid response actions that match the leak location.

[0083] In the above embodiments, this embodiment realizes a precise positioning chain of signal fingerprint, physical location, and execution device through signal decoding and spatial mapping. The dual-channel concurrent control based on risk level constructs a hierarchical response system - solid-state relays ensure millisecond-level power failure braking, and PWM drive realizes intelligent control of directional strong ventilation. The two work together to form a closed-loop protection from emergency containment to environmental treatment.

[0084] Example 5:

[0085] Based on Example 4, the process of completing the positioning mapping from signal to space in step S302 provided in this embodiment of the invention includes the following steps:

[0086] Step S3021: The signal source identifier contained in the obtained preliminary leakage event descriptor is extracted. It is a unique code pre-programmed into the sensor and represents only a logical entity.

[0087] Step S3022: The mapping table describes the physical coordinates of all conductive leakage sensors under the dual-cavity isolation structure of the battery compartment, the fluid flow area they monitor, and the topological relationship network of the liquid cooling circulation subsystem and ventilation subsystem to which the area belongs;

[0088] Step S3023: Use the received signal source identifier as a query key to match in the mapping table; after a successful match, read three sets of output information from the mapping table simultaneously: the first set is the physical coordinates of the conductive leakage sensor, which are converted into spatial location codes to form a physical spatial location identifier; the second set is the unique cold plate circulation pump number corresponding to the liquid cooling circulation subsystem to which the coordinate point belongs; the third set is the unique exhaust fan number corresponding to the ventilation subsystem to which the coordinate point belongs.

[0089] In the above embodiments, this embodiment achieves the conversion of logical identifiers to physical locations by accurately matching the unique sensor code with the system topology network. At the same time, it associates the corresponding execution device number and establishes a clear correspondence between the signal source and the physical space, the liquid cooling circulation subsystem, and the ventilation subsystem, providing a complete location and device basis for subsequent precise control.

[0090] Example 6:

[0091] Based on Example 5, the matching process in the mapping table in step S3023 provided in this embodiment of the invention includes the following steps:

[0092] Step S30231: The binary encoding structure of the extracted signal source identifier enters the preprocessing unit of the identifier hierarchical indexer; the preprocessing unit parses its high-order part into a region segment code and its low-order part into a device sequence code according to the encoding rules of the identifier.

[0093] Step S30232: The region segment code is used to locate the corresponding physical partition storage block in the mapping table in the first-level index; based on the address mapping mechanism, the value of the region segment code directly points to the starting address of a specific partition on the storage medium;

[0094] Step S30233: After locating the correct physical partition storage block, the device serial number is used as the key for the second-level matching; the device serial number is compared bit by bit with the sensor identifier stored in each entry within the block;

[0095] Step S30234: When the bit-by-bit comparison results are completely consistent, the match is successful; the physical address of the entry in the storage block is locked, and a continuous data block is read from this locked address unit; the data block contains pre-stored triplet information: sensor physical coordinate data, the bound cold plate circulation pump number, and the bound exhaust fan number.

[0096] In the above embodiments, this embodiment achieves efficient querying through a hierarchical indexing mechanism. First, it quickly locates the storage partition based on the area segment code, then accurately matches the specific entry through the device serial code, and finally obtains the physical coordinates of the target sensor and the related device number, ensuring the accuracy and speed of data retrieval, while reducing the query complexity of large-scale mapping tables.

[0097] Example 7:

[0098] Based on Example 6, the process of the preprocessing unit in step S30231 of the present invention, according to the encoding rules of the identifier, includes the following steps:

[0099] Step S302311: The signal source identifier is sent as a complete binary encoded sequence to the input register of the preprocessing unit; the rules for the construction of the binary encoded sequence are defined during initialization by a data structure called a static configuration descriptor, which specifies the total bit width of the signal source identifier, the start bit and bit width of the region segment code, and the start bit and bit width of the device sequence code.

[0100] Step S302312: Physically divide the continuous binary encoded sequence into two independent bit segments; the first bit segment consists of a specific number of consecutive bits starting from the most significant bit, and is output and named the region segment code; the second bit segment consists of all the remaining bits, and is output and named the device sequence code.

[0101] Step S302313: Through a level signal recombination operation based on predefined rules, the signal source identifier is parsed into two independent coded segments with different functional meanings: the area segment code and the device sequence code; the coded segments provide input key values ​​for hierarchical index queries.

[0102] In the above embodiments, this embodiment splits the signal source identifier into two functionally independent fields, the area segment code and the device sequence code, through predefined binary encoding rules, establishing the structured input data required for hierarchical retrieval, providing accurate key-value basis for subsequent hierarchical index queries, and ensuring the configurability and scalability of the encoding and parsing process.

[0103] Example 8:

[0104] Based on Example 7, the process of physically dividing a continuous binary encoded sequence into two independent bit segments in step S302312 of this embodiment of the invention includes the following steps:

[0105] Step S3023121: The complete binary encoded sequence stored in the input register has its output lines connected in parallel to two independent physical selector arrays; the conduction state of the two physical selector arrays is pre-configured and controlled by the region segment code bit width parameter defined in the static configuration descriptor;

[0106] Step S3023122: The first selector array is configured to allow a specific number of consecutive bit signals to pass through, starting from the most significant bit. The allowed signal lines are physically aggregated onto a new set of output lines, and the new parallel output signal is defined as a region segment code. At the same time, the second selector array is configured to complement the first set, allowing only the remaining number of bit signals to pass through. It is also aggregated onto another set of independent output lines, and the output signal is defined as a device sequence code.

[0107] Step S3023123: Through a physical signal routing mechanism based on pre-configured parameters, a binary coded sequence is synchronously and physically separated into two independent data paths with clear boundaries and specific functions; the area segment code and the device sequence code are latched into their respective output registers.

[0108] In the above embodiments, this embodiment achieves physical segmentation of the binary encoded sequence through a parallel selector array. Based on pre-configured parameters, the input signal is synchronously separated into two independent data paths: the regional segment code and the device sequence code, ensuring the real-time performance and accuracy of the encoding parsing. At the same time, a hardware-level signal routing mechanism is used to maintain data integrity and processing efficiency.

[0109] Example 9:

[0110] Based on Example 8, the process pre-configured and controlled by the region segment code bit width parameter defined in the static configuration descriptor in step S3023121 of the present invention includes the following steps:

[0111] Step S30231211: The region segment code bit width parameter defined in the static configuration descriptor is written into a bit width configuration register through a hardware configuration port loaded during system initialization; the output value of the bit width configuration register is sent to the combinational logic circuit of the array control word generation logic as a set of parallel binary signals representing the bit width value.

[0112] Step S30231212: The array control word generation logic performs specific decoding operations based on the input bit width value signal to generate two sets of control word signals of length corresponding to each bit position of the input register; the level state of each bit of the first set of control word signals is used to indicate whether the signal of the corresponding bit in the input register belongs to the category of the area segment code; the second set of control word signals is the logical inversion of the first set, used to indicate whether the signal of its corresponding bit belongs to the category of the device sequence code;

[0113] Step S30231213: Two sets of control word signals, as the conduction control inputs of the physical selector array, are respectively connected to the control terminals of each selection unit of the two selector arrays; each selection unit determines whether to transmit the signal level from the corresponding bit of the input register to its output terminal according to the level of its control terminal input.

[0114] In the above embodiments, this embodiment dynamically controls the conduction state of the selector array through hardware configuration registers, converts static configuration parameters into operable physical signal paths, realizes the automatic segmentation function of the encoded sequence, ensures the accuracy and flexibility of signal routing, and maintains the system's high efficiency and real-time response capability through hardware-level parallel processing.

[0115] Example 10:

[0116] like Figures 5-7 As shown, based on Embodiments 1-9, the liquid cooling control system for preventing leakage of old batteries based on dual-cavity isolation provided by the present invention includes: a leakage collection tank 1, a heat-conducting wall surface 2, a two-phase cold plate 3, and an old battery 4.

[0117] Among them, the old batteries 4 are enclosed in two separate battery compartments; the bottom of the battery compartment is equipped with a leakage collection tank 1, and the outside of the battery compartment is equipped with a heat-conducting wall 2; two-phase cold plates 3 are installed on both sides of the heat-conducting wall 2.

[0118] In the above embodiment, this embodiment is based on the dual-cavity isolation of the battery compartment and cooling chamber; the old batteries 4 are encapsulated in twos in an independently sealed battery compartment. The compartment adopts a double-layer sealing structure, wherein the double-layer sealing structure consists of an inner rubber sealing ring and an outer metal-coated sealing gasket to ensure that leakage does not overflow; a leakage collection tank 1 is provided at the bottom of the compartment, wherein the leakage collection tank 1 includes an inclined guide channel, and a coating is laid in the tank to reduce leakage adhesion. The end of the tank is connected to a pull-out leakage collection box; wherein the pull-out leakage collection box includes a built-in three-layer liquid-absorbing structure—a bottom layer of hydrophilic fiber cotton, a middle layer of activated carbon felt, and a top layer of breathable nylon mesh, which can collect leakage in a directional manner; a heat-conducting wall 2 is installed between the two-phase cold plate 3 and the battery compartment, and the side of the partition close to the battery compartment has Copper micro-bumps enhance heat transfer, and a flow channel groove is machined on the other side to fit the two-phase cold plate 3. The two-phase cold plate 3 adopts a serpentine flow channel. The coolant enters from the inlet of the two-phase cold plate 3, absorbs battery heat through the partition as it flows through the flow channel, and then flows out from the outlet into the condenser. After condensation, it flows back to the two-phase cold plate 3 through the circulation pump, forming a closed loop circulation. At the same time, the inner walls of the cold plate and connecting pipes are sprayed with an anti-corrosion coating to reduce the risk of leakage corrosion. Conductive leakage sensors are installed in the middle section of the guide sloping channel at the bottom of the battery compartment and at the inlet interface of the cold plate. The conductivity of the electrolyte in the leakage liquid triggers the leakage detection. The sensors communicate with the control system in real time. Once a leakage is detected, the control system initiates a three-layer response within 1 second: the first layer shuts down the corresponding cold plate circulation pump within 0~100ms. The system employs a brushless DC motor with a Hall sensor. The controller directly cuts off the power and sends a braking command via a solid-state relay with a response time ≤10ms, stopping the pump impeller within 50ms to block coolant flow. The second layer activates the exhaust fan on top of the battery compartment within 50-300ms. This exhaust fan is a miniature axial flow fan with a speed of 3000rpm, driven by the controller via a PWM signal, reaching its rated speed within 50ms to quickly expel electrolyte vapor from the compartment at a flow rate ≥5L / min, reducing the risk of combustion and explosion. The third layer triggers a positioning alarm within 100-800ms. The LED screen and buzzer are controlled by independent drive circuits, activated directly by high and low level signals output by the controller. The screen refresh time is ≤200ms. The oscillator start-up time is ≤50ms, ensuring a complete response within 800ms. The hardware employs a close-range deployment from sensor to controller to actuator to reduce signal transmission delay. The controller peripheral interface uses high-speed GPIO with a switching speed of ≤1ns. The actuator drive circuit integrates pre-driver chips such as IR2104 to shorten the switching time of power devices. At the software level, the leakage detection task is set as the highest interrupt priority in the system. Interrupt service routines and direct register operation mode are adopted to bypass the operating system kernel scheduling process and achieve direct mapping from sensor signals to actuator actions. At the same time, the controller has a built-in dual core, with the main core processing logic and the slave core monitoring the timing. If the main core response times out, the slave core directly triggers the backup drive circuit to ensure response reliability.The cold plate and thermally conductive partition are connected by a flexible press-fit, with silicone thermal pads embedded at the edges and spring clips. The return liquid pipeline is connected in series with a filter module containing ion exchange resin and a filter screen to adsorb trace amounts of electrolyte ions and prevent pipeline blockage. The overall design ensures heat dissipation efficiency while comprehensively reducing the risk of leakage in older batteries through precise sensing and rapid response. A hierarchical risk defense system is constructed to achieve zero cross-contamination: A multi-layered protection network is formed through physical barriers of dual-cavity isolation, material protection of anti-corrosion coatings, and stress buffering of elastic connections. This blocks the contact path between leaking fluid and coolant at the source. Simultaneously, an intelligent monitoring system enables immediate response to leaks, ensuring the cooling system operates in a clean state over the long term. Highly efficient thermal resistance control is achieved, synergistically ensuring protection and heat dissipation: A composite structure of aluminum nitride ceramic separators and silicone thermal pads is adopted. While strengthening leak isolation, the interface thermal resistance is stably controlled at a low level through micro-protrusion contact and elastic pressing design. This retains the high efficiency of two-phase cold plate phase change heat dissipation while avoiding interference from the heat transfer path by the protective structure, achieving a dynamic balance between safety and efficiency. A modular adaptive architecture is formed to enhance compatibility: The modular design of independent sealed chambers, replaceable filter modules, and elastic connection components can flexibly adapt to battery modules with different aging levels. Cooling system upgrades can be completed without modifying the battery itself, significantly reducing the technical iteration costs in older battery scenarios.

[0119] Figure 8 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present invention is shown.

[0120] The electronic device may include a central processing unit / microprocessor / main control chip 12; and a storage medium 5 coupled to the central processing unit / microprocessor / main control chip 12 and storing computer-executable instructions therein for performing the steps of various methods of embodiments of the present invention when executed by the processor.

[0121] The central processing unit / microprocessor / main control chip 12 may include, but is not limited to, one or more processors or microprocessors.

[0122] Storage medium 5 may include, but is not limited to, random access memory (RAM), read-only memory (ROM), flash memory, EPROM memory, EEPROM memory, registers, computer storage media (e.g., hard disk, floppy disk, solid-state drive, removable disk, CD-ROM, DVD-ROM, Blu-ray disc, etc.).

[0123] In addition, the electronic device may also include (but is not limited to) a data bus 6, an input / output bus / external bus / device bus 7, a display 8, and input / output devices 9 (e.g., keyboard, mouse, speaker, etc.).

[0124] The central processing unit / microprocessor / main control chip 12 can communicate with external devices (8, 9, etc.) via wired or wireless networks (not shown) through the input / output bus / external bus / device bus 7.

[0125] The storage medium 5 may also store at least one computer-executable instruction for performing the steps of various functions and / or methods in the embodiments described herein when the central processing unit / microprocessor / main control chip 12 is running.

[0126] In one embodiment, the at least one computer-executable instruction may also be compiled into or comprise a software product, wherein one or more computer-executable instructions are executed by a processor to perform the steps of the various functions and / or methods in the embodiments described herein.

[0127] Figure 9 A schematic diagram of a computer-readable storage medium according to an embodiment of the present invention is shown.

[0128] like Figure 9 As shown, the computer-readable storage medium 11 stores instructions, such as computer-readable instruction 10. When the computer-readable instruction 10 is executed by a processor, the various methods described above can be performed. The computer-readable storage medium includes, but is not limited to, volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. For example, the computer-readable storage medium 11 can be connected to a computing device such as a computer, and then, when the computing device executes the computer-readable instruction 10 stored on the computer-readable storage medium 11, the various methods described above can be performed.

[0129] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0130] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0131] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0132] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for executing all or part of the steps of the methods of the various embodiments of this invention through a computer device (which may be a personal computer, server, or network device, etc.). The aforementioned storage medium includes: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media capable of storing program code.

[0133] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation, characterized in that, The old battery refers to a battery whose cycle life has decreased to below 80%; the dual-cavity isolation is the isolation between the battery compartment and the cooling cavity, and the leaking liquid is electrolyte, which includes the following steps: Start monitoring to determine if the leak sensor is triggered. If not, continue monitoring. If triggered, activate the three-level response mechanism to transmit and process the leak signal differentially. The leakage signal is transmitted differentially and analyzed for control purposes. Based on the analysis results, the location and control are performed, the mapping table is queried, the cold plate pump is shut down, and the exhaust fan is turned on. An alarm is triggered based on the leakage status of the leakage signal, and the data is transmitted to the cloud for early warning.

2. The liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation as described in claim 1, characterized in that, The first layer shuts down the corresponding cold plate circulation pump within 0-100ms. The circulation pump uses a DC brushless motor with a Hall sensor. The controller cuts off the power and sends a braking command through a solid-state relay with a response time of no more than 10ms, causing the pump impeller to stop rotating within 50ms to block the flow of coolant. The second layer starts the exhaust fan on top of the battery compartment within 50-300ms. The exhaust fan is a miniature axial flow fan with a speed of 3000rpm. The controller drives it through a PWM signal to quickly expel electrolyte vapor in the compartment at an airflow of no less than 5L / min to reduce the risk of combustion and explosion. The third layer triggers a positioning alarm within 100-800ms. The LED screen and buzzer are controlled by independent drive circuits. The controller outputs high and low level signals to activate them directly. The screen refresh time is no more than 200ms, and the buzzer oscillation time is no more than 50ms.

3. The liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation as described in claim 1, characterized in that, The process of locating and controlling based on the control analysis results includes the following steps: The signal parsing system receives differential signals and decodes them to separate the signal source identifier and signal strength information, forming a preliminary leak event descriptor. The signal source identifier in the initial leakage event descriptor is matched and queried with the mapping table to convert the abstract conductive leakage sensor ID into a specific physical spatial location identifier, and at the same time, the execution device number bound to the physical spatial location is obtained, thus completing the location mapping from signal to space. Based on the location mapping results, two concurrent deterministic control commands are generated; The first instruction targets the cold plate circulation pump corresponding to the located area, combining signal strength information extracted from the initial leakage event descriptor. If the signal strength exceeds the preset high-risk threshold, the instruction will include the highest priority emergency stop command, which will be directly issued through a solid-state relay path with extremely short response time, achieving rapid power-off and braking in the first layer of response. The second instruction targets the exhaust fan corresponding to the located area, generating a full-speed start command, which is issued through the PWM drive circuit to achieve high-speed ventilation in the second layer of response. The two deterministic control instructions are sent to the corresponding cold plate circulation pump controller and exhaust fan controller, respectively, driving the physical actuators to complete the rapid response action.

4. The liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation as described in claim 3, characterized in that, The process of mapping a signal to a location in space includes the following steps: From the initial leak event descriptor obtained, the signal source identifier contained within it is extracted. It is a unique code pre-programmed into the sensor and represents only a logical entity. The mapping table describes the physical coordinates of all conductive leakage sensors under the dual-cavity isolation structure of the battery compartment, the fluid flow area they monitor, and the topological relationship network of the liquid cooling circulation subsystem and ventilation subsystem to which the area belongs; The received signal source identifier is used as the query key to match in the mapping table. After a successful match, three sets of output information are read from the mapping table at the same time: the first set is the physical coordinates of the conductive leakage sensor, which are converted into spatial location codes to form a physical spatial location identifier; the second set is the unique cold plate circulation pump number corresponding to the liquid cooling circulation subsystem to which the coordinate point belongs; and the third set is the unique exhaust fan number corresponding to the ventilation subsystem to which the coordinate point belongs.

5. The liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation as described in claim 4, characterized in that, The matching process in the mapping table includes the following steps: The binary encoding structure of the extracted signal source identifier enters the preprocessing unit of the identifier hierarchical indexer. The preprocessing unit parses the high-order part of the identifier into a region segment code and the low-order part into a device serial code according to the encoding rules of the identifier; The region segment code is used to locate the corresponding physical partition storage block in the mapping table in the first-level index; Based on the address mapping mechanism, the value of the region segment code directly points to the starting address of a certain partition on the storage medium. After locating the correct physical partition storage block, the device serial number is used as the key for the second-level matching; the device serial number is compared bit by bit with the sensor identifier stored in each entry within the block; When the bit-by-bit comparison results are completely consistent, the match is successful; the physical address of the entry in the storage block is locked, and a continuous data block is read from this locked address unit; the data block contains pre-stored triplet information: sensor physical coordinate data, the bound cold plate circulation pump number, and the bound exhaust fan number.

6. The liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation as described in claim 5, characterized in that, The preprocessing unit's process based on the identifier encoding rules includes the following steps: The signal source identifier is sent as a complete binary encoded sequence to the input register of the preprocessing unit. The rules for constructing the binary encoded sequence are defined during initialization by a data structure called a static configuration descriptor, which specifies the total bit width of the signal source identifier, the start bit and bit width of the region segment code, and the start bit and bit width of the device sequence code. The continuous binary encoded sequence is physically divided into two independent bit segments; the first bit segment consists of a continuous number of bits starting from the most significant bit, which is output and named the region segment code; the second bit segment consists of all the remaining bits, which is output and named the device sequence code. Through a level signal recombination operation based on predefined rules, the signal source identifier is parsed into two independent coded segments with different functional meanings: a region segment code and a device sequence code; the coded segments provide input key values ​​for hierarchical index queries.

7. The liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation as described in claim 6, characterized in that, The process of physically dividing a continuous binary encoded sequence into two independent bit segments includes the following steps: The complete binary encoded sequence stored in the input register has its output lines connected in parallel to two independent physical selector arrays; the conduction state of the two physical selector arrays is pre-configured and controlled by the region segment code bit width parameter defined in the static configuration descriptor; The first selector array is configured to allow a consecutive number of bits, starting from the most significant bit, to pass through. The allowed signal lines are physically aggregated onto a new set of output lines, and the new parallel output signals are defined as the region segment code. Meanwhile, the second selector array is configured to complement the first set, allowing only the remaining number of bits to pass through. It is also aggregated onto another set of independent output lines, and the output signals are defined as the device sequence code. Through a physical signal routing mechanism based on pre-configured parameters, a binary coded sequence is synchronously and physically separated into two independent data paths with clear boundaries and functions; the area segment code and the device sequence code are latched into their respective output registers.

8. The liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation as described in claim 7, characterized in that, The process pre-configured and controlled by the region segment code bit width parameter defined in the static configuration descriptor includes the following steps: The region segment code bit width parameter defined in the static configuration descriptor is written into a bit width configuration register through a hardware configuration port loaded during system initialization; the output value of the bit width configuration register is sent as a set of parallel binary signals representing the bit width value to the combinational logic circuit of the array control word generation logic. The array control word generation logic performs decoding operations based on the input bit width value signal to generate two sets of control word signals of different lengths corresponding to each bit position of the input register. The first group of control word signals, the level state of each bit is used to indicate whether the signal of the corresponding bit in the input register belongs to the category of the area segment code; The second group of control word signals is the logical inversion of the first group, used to indicate whether the signal of the corresponding bit belongs to the category of device serial code; Two sets of control word signals, as the conduction control inputs of the physical selector array, are respectively connected to the control terminal of each selection unit of the two selector arrays; Each selection unit determines whether to transmit the signal level from the corresponding bit of the input register to its output terminal based on the level of the input input terminal.

9. The liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation as described in claim 1, characterized in that, It also includes the installation of conductive leakage sensors in the middle section of the bottom guide channel of the battery compartment and at the cold plate inlet interface. The leakage detection is triggered by the conductivity of the electrolyte in the leakage liquid, and the sensors communicate with the control system in real time.

10. A liquid cooling control system for preventing leakage in old batteries based on dual-cavity isolation, implementing the liquid cooling control method for preventing leakage in old batteries based on dual-cavity isolation as described in any one of claims 1 to 9, characterized in that, include: Leakage collection tank, heat-conducting wall surface, two-phase cold plate, old battery; Among them, the old batteries are enclosed in two separate battery compartments; The bottom of the battery compartment is equipped with a leakage collection tank, and a heat-conducting wall is set on the outside of the battery compartment; two-phase cold plates are installed on both sides of the heat-conducting wall.

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