Out-of-control monitoring system of integrated battery cell and battery equipment
By setting up thermal runaway monitoring points on the cell acquisition and control unit, collecting and analyzing parameters of the cell and the thermal runaway monitoring points, and promptly bypassing thermal runaway cells, the problem of monitoring and preventing thermal runaway in lithium battery cells is solved, thus improving the safety of the battery system.
Patent Information
- Application Number
- CN202423229864.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing technologies cannot effectively monitor and prevent thermal runaway in lithium battery cells, which may lead to fires or explosions.
Design an integrated battery cell runaway monitoring system. By setting thermal runaway monitoring points on each battery cell acquisition and control unit, the system collects the attribute parameters of the battery cell and the thermal runaway monitoring points. The main controller then determines whether thermal runaway has occurred and promptly bypasses the thermal runaway battery cell.
It enables the prediction and monitoring of thermal runaway in battery cells, reduces the risk of thermal runaway, and improves the safety and reliability of battery systems.
Smart Images
Figure CN223858191U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery monitoring technical field, concretely relates to integrated electric core's out of control monitoring system and battery equipment. BACKGROUND
[0002] With the development of new energy vehicles and the support of relevant departments to the industry, various electric vehicles will gradually replace traditional fuel vehicles. Lithium batteries are widely used in automobile power battery packs due to their high power and energy density, long service life and other advantages. The most dangerous situation of lithium battery is thermal runaway, which releases a large amount of toxic and high-temperature gas, and generates a large amount of heat to the adjacent electric core, thereby causing other electric core thermal runaway, eventually leading to the whole battery pack thermal runaway, fire and explosion, endangering the safety of people.
[0003] Battery thermal runaway refers to the rapid rise of internal temperature of the battery under certain conditions, which leads to the uncontrollable state of the battery, and may cause the battery to catch fire or even explode in severe cases. This phenomenon is usually caused by the following key factors: overheating, overcharging, internal short circuit and collision, etc. The cause of thermal runaway, the related reactions inside the battery and the flowchart of thermal runaway are shown in Figure 1
[0004] Therefore, it is necessary to monitor and prevent the thermal runaway of the battery core. At present, it is impossible to monitor and prevent the thermal runaway of the battery core. In order to avoid the problem of battery thermal runaway, an out-of-control monitoring system for battery core is urgently needed. SUMMARY
[0005] Therefore, the utility model provides an integrated electric core's out of control monitoring system and battery equipment to solve the problem that the thermal runaway of the electric core cannot be monitored and prevented.
[0006] In the first aspect, the utility model provides an integrated electric core's out of control monitoring system, and the system comprises: a plurality of series connected electric core acquisition control units, a battery pack formed by a plurality of series connected electric cores and a main controller; a plurality of thermal runaway monitoring points are arranged on each electric core acquisition control unit, and the number of thermal runaway monitoring points is the same as the number of electric cores in the battery pack;
[0007] Each electric core acquisition control unit is connected with a preset number of electric cores in the battery pack and the main controller respectively; each thermal runaway monitoring point is connected with each electric core in the battery pack respectively;
[0008] When the battery pack formed by the plurality of battery cells in series is working, each battery cell acquisition control unit acquires the attribute parameters of the corresponding connected battery cell and the attribute parameters of each thermal runaway monitoring point and transmits them to the main controller, and the main controller judges whether the corresponding battery cell has thermal runaway based on the attribute parameters of the battery cell and the attribute parameters of each thermal runaway monitoring point, and when the battery cell has thermal runaway, the battery cell acquisition control unit connected to the battery cell bypasses the thermal runaway battery cell.
[0009] The integrated battery cell runaway monitoring system provided by the utility model, when the battery pack works, each battery cell acquisition control unit acquires the attribute parameters of the corresponding connected battery cell and the attribute parameters of each thermal runaway monitoring point and transmits them to the main controller, and the main controller judges whether the corresponding battery cell has thermal runaway based on the attribute parameters of the battery cell and the attribute parameters of the explosion-proof valve in the battery cell, and when the battery cell has thermal runaway, the battery cell acquisition control unit connected to the battery cell bypasses the thermal runaway battery cell, realizes the thermal runaway prediction and monitoring of the battery cell and the purpose of timely processing of the fault battery cell when thermal runaway occurs, and solves the problem that the thermal runaway phenomenon of the battery cell cannot be monitored and prevented.
[0010] In an optional implementation, each battery cell acquisition control unit further comprises a MOS drive switch, a voltage monitoring element, a temperature monitoring element, a thermal runaway monitoring element and a microcontroller; the attribute parameters of the battery cell comprise a battery cell voltage and a battery cell temperature; the attribute parameters of the thermal runaway monitoring point comprise a temperature and a humidity of each thermal runaway monitoring point;
[0011] The MOS drive switch, the voltage monitoring element, the temperature monitoring element and the thermal runaway monitoring element are connected with the microcontroller;
[0012] The MOS drive switch is used for controlling the opening and closing of the battery cell; the voltage monitoring element is used for acquiring the battery cell voltage of the corresponding battery cell, and the temperature monitoring element is used for acquiring the battery cell temperature of the corresponding battery cell; and the thermal runaway monitoring element is used for acquiring the temperature and the humidity of each thermal runaway monitoring point;
[0013] The microcontroller is used for controlling the switching operation of the MOS drive switch and the acquisition operation of the voltage monitoring element, the temperature monitoring element and the thermal runaway monitoring element according to the control instruction of the main controller.
[0014] In an optional implementation, each thermal runaway monitoring point is connected with an explosion-proof valve in the corresponding battery cell, and the temperature and the humidity of each thermal runaway monitoring point are respectively a valve port temperature and a valve port humidity of the explosion-proof valve;
[0015] The thermal runaway monitoring element is further used for acquiring the valve port temperature and the valve port humidity of the explosion-proof valve in the corresponding battery cell.
[0016] The integrated electric core out-of-control monitoring system provided by the utility model adopts an integrated electric core near-end multi-dimension collection scheme, reduces the intermediate flying wire connection process complexity in a collection management mode, further improves reliability, can also predict electric core failure risk in advance, and reduces failure probability and actual effect loss.
[0017] In an alternative embodiment, each electric core collection control unit further comprises a voltage regulating circuit, the voltage regulating circuit is connected with each electric core in the battery pack, and the voltage regulating circuit is used for adjusting the input voltage of each electric core.
[0018] In an alternative embodiment, each electric core collection control unit further comprises an isolation communication module, the isolation communication module is connected with the microcontroller and the main controller respectively, and the isolation communication module is used for communication between the microcontroller and the main controller.
[0019] In an alternative embodiment, the main controller comprises a comparator and an interrupt control chip; the interrupt control chip comprises an input / output interface and a signal generator control CU;
[0020] The comparator is used for receiving the attribute parameters of each electric core and the attribute parameters of each thermal runaway monitoring point, and comparing the attribute parameters of each electric core and the attribute parameters of the thermal runaway monitoring point with corresponding electric core attribute parameter thresholds and corresponding thermal runaway monitoring point attribute parameter thresholds respectively, to determine whether the corresponding electric core has thermal runaway;
[0021] The main controller is connected with the microcontroller through the input / output interface, and the signal generator control CU is used for sending a control instruction to the microcontroller.
[0022] In an alternative embodiment, when thermal runaway occurs, the signal generator control CU sends a control instruction to the microcontroller, and the microcontroller controls the MOS drive switch to bypass the corresponding thermal runaway electric core.
[0023] The integrated electric core out-of-control monitoring system provided by the utility model realizes the purpose of point-to-point electric core control through the internal structure of the electric core collection control unit, timely adjusts the monomer energy flow strategy, optimizes the monomer energy short board, and cuts off the failure risk source.
[0024] In an alternative embodiment, the plurality of series-connected electric core collection control units and the battery pack formed by the plurality of series-connected electric cores are independently structured.
[0025] In an alternative embodiment, the plurality of series-connected electric core collection control units and the battery pack formed by the plurality of series-connected electric cores are integrally structured.
[0026] The integrated electric core out-of-control monitoring system can select various setting structures to design the connection relationship between the multiple series connection electric core collection control units and the battery pack formed by multiple series connection electric cores, and has the advantages of flexible design and reliable performance.
[0027] In a second aspect, the utility model provides a kind of battery equipment, and the equipment includes: the integrated electric core out-of-control monitoring system of the first aspect or any implementation thereof and electric core spine;
[0028] Each electric core collection control unit in the integrated electric core energy management system is connected with the preset number of electric cores in battery pack and main controller respectively to form single monitoring module, and multiple single monitoring modules are encapsulated by electric core spine to form battery equipment. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings described below are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0030] Figure 1 The cause of electric core thermal runaway, internal reaction of battery and state diagram after thermal runaway of battery;
[0031] Figure 2 It is the structure schematic view of the integrated electric core out-of-control monitoring system according to the embodiment of the utility model;
[0032] Figure 3 It is the structure schematic view of another integrated electric core out-of-control monitoring system according to the embodiment of the utility model;
[0033] Figure 4 It is the structure schematic view of each electric core collection control unit according to the embodiment of the utility model;
[0034] Figure 5 It is the distribution schematic view of thermal runaway monitoring point on each electric core collection control unit according to the embodiment of the utility model;
[0035] Figure 6 It is the structure schematic view of battery equipment according to the embodiment of the utility model;
[0036] Figure 7 It is the process schematic view of integrated electric core out-of-control monitoring system startup, communication and self-checking according to the embodiment of the utility model;
[0037] Figure 8is a process schematic diagram of the integrated electric core's out-of-control monitoring system of the embodiment of the utility model for monitoring the state of electric core;
[0038] Figure 9 is a process schematic diagram of the integrated electric core's out-of-control monitoring system running of the embodiment of the utility model. DETAILED DESCRIPTION
[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the utility model.
[0040] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0041] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected, can be mechanically connected, or can be electrically connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements, can be wireless connection, or can be wired connection. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0042] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.
[0043] An integrated electric core's out-of-control monitoring system is provided in the embodiment, Figure 2 is a structure diagram of the integrated electric core's out-of-control monitoring system according to the embodiment of the utility model, like Figure 2As shown, the system comprises: a plurality of series-connected battery cell acquisition control units, a plurality of battery packs formed by a plurality of series-connected battery cells, and a main controller; each battery cell acquisition control unit is provided with a same number of thermal runaway monitoring points as the number of battery cells in the battery pack; each battery cell acquisition control unit is respectively connected to a preset number of battery cells in the battery pack and the main controller; and each thermal runaway monitoring point is connected to each battery cell in the battery pack.
[0044] When the battery pack is working, each battery cell acquisition control unit acquires the attribute parameters of the corresponding connected battery cells and the attribute parameters of each thermal runaway monitoring point and transmits them to the main controller. The main controller determines whether the corresponding battery cell has thermal runaway based on the attribute parameters of the battery cell and the attribute parameters of each thermal runaway monitoring point. When the battery cell has thermal runaway, the battery cell acquisition control unit connected to the battery cell bypasses the thermal runaway battery cell.
[0045] The preset number is set according to actual conditions and is not specifically limited herein. The attribute parameters of the battery cell can include battery cell voltage, battery cell temperature, and battery cell internal resistance, etc. The attribute parameters of each thermal runaway monitoring point can be temperature and humidity at the valve port of the battery explosion-proof valve, etc. When the battery cell has thermal runaway, the battery cell acquisition control unit connected to the battery cell bypasses the thermal runaway battery cell, which means cutting off the current of the battery cell having thermal runaway.
[0046] The flowchart of the startup, communication, and self-check of the integrated battery cell thermal runaway monitoring system is shown in Figure 7 As shown, the entire system is in a sleep state before startup, is awakened by the communication bus of the main controller, and determines whether the local instruction is timed out. When the instruction is not timed out, it is determined whether the instruction is valid (whether the instruction conforms to the communication protocol standard, i.e., communication verification). When the instruction is valid, the attribute parameters of the corresponding connected battery cells and the attribute parameters of each thermal runaway monitoring point are acquired by each battery cell acquisition control unit according to the data acquisition requirement in the instruction and are transmitted to the main controller. The acquisition action completion operation is returned to the main controller to confirm whether the main controller has received the above-mentioned acquired attribute parameters. When the main controller has received them, each battery cell acquisition control unit needs to wait for the control instruction of the main controller. When the instruction is timed out, the entire integrated battery cell thermal runaway monitoring system continues to be in a sleep state. When the instruction is invalid, the information that the instruction is invalid is returned to the main controller.
[0047] The integrated cell runaway monitoring system provided in the embodiment, when the battery pack is working, each cell acquisition control unit acquires the attribute parameters of the connected cell and the attribute parameters of each thermal runaway monitoring point and transmits them to the main controller, the main controller judges whether the corresponding cell has thermal runaway based on the attribute parameters of the cell and the attribute parameters of the explosion-proof valve in the cell, when the cell has thermal runaway, the cell acquisition control unit connected with the cell bypasses the thermal runaway cell, realizes the thermal runaway prediction and monitoring of the cell, and the purpose of timely processing the fault cell when thermal runaway occurs, solves the problem that the thermal runaway of the cell cannot be monitored and prevented.
[0048] As shown in Figure 4 , each cell acquisition control unit further comprises a MOS drive switch, a voltage monitoring element, a temperature monitoring element, a thermal runaway monitoring element and a microcontroller (MCU); the attribute parameters of the cell include the cell voltage and the cell temperature; the attribute parameters of the thermal runaway monitoring point include the temperature and humidity of each thermal runaway monitoring point; the MOS drive switch, the voltage monitoring element, the temperature monitoring element and the thermal runaway monitoring element are connected with the microcontroller; the MOS drive switch is used to control the opening and closing of the cell; the voltage monitoring element is used to acquire the cell voltage of the corresponding cell, and the temperature monitoring element is used to acquire the cell temperature of the corresponding cell; the thermal runaway monitoring element is used to acquire the temperature and humidity of each thermal runaway monitoring point; the microcontroller is used to control the switching operation of the MOS drive switch and control the acquisition operation of the voltage monitoring element, the temperature monitoring element and the thermal runaway monitoring element according to the control instruction of the main controller.
[0049] In an optional embodiment, as shown in Figure 3 , the preset number in the embodiment is 2, the battery pack formed by the series connection of the plurality of cells is denoted as PACK, and each cell acquisition control unit is connected with two cells, as shown in Figure 5 , each thermal runaway monitoring point is connected with each cell in the battery pack. When the battery pack PACK is working, each cell acquisition control unit acquires the attribute parameters of the connected cell and the attribute parameters of each thermal runaway monitoring point and transmits them to the main controller, the main controller judges whether the corresponding cell has thermal runaway based on the attribute parameters of the cell and the attribute parameters of each thermal runaway monitoring point, and when the cell has thermal runaway, the cell acquisition control unit connected with the cell bypasses the thermal runaway cell. Wherein, each thermal runaway monitoring point is connected with the explosion-proof valve in the corresponding cell, the temperature and humidity of each thermal runaway monitoring point are the valve port temperature and valve port humidity of the explosion-proof valve respectively, and the thermal runaway monitoring element is used to acquire the valve port temperature and valve port humidity of the explosion-proof valve in the corresponding cell.
[0050] In an optional embodiment, as shown in Figure 4As shown, each battery cell acquisition control unit further includes a voltage regulation circuit, which is connected to each battery cell in the battery pack, and is used to adjust the input voltage of each battery cell.
[0051] The voltage regulation circuit can convert the input AC voltage into a stable DC voltage output, thereby providing a stable power supply for the battery cell, and can also filter and protect the input voltage to prevent damage to the battery cell caused by excessively high or low voltage.
[0052] In an alternative embodiment, as shown, each battery cell acquisition control unit further includes an isolation communication module, which is connected to the microcontroller and the main controller, respectively, and is used for communication between the microcontroller and the main controller. Figure 4
[0053] In an alternative embodiment, the main controller includes a comparator and an interrupt control chip; the interrupt control chip includes an input / output interface and a signal generator control CU; the comparator is used to receive the attribute parameters of each battery cell and the attribute parameters of each thermal runaway monitoring point, and compare the attribute parameters of each battery cell and the attribute parameters of each thermal runaway monitoring point with the corresponding battery cell attribute parameter threshold and the corresponding thermal runaway monitoring point attribute parameter threshold, respectively, to determine whether the corresponding battery cell has thermal runaway; the main controller is connected to the microcontroller through the input / output interface, and the signal generator control CU is used to send control instructions to the microcontroller.
[0054] Specifically, the signal generator control CU (Control Unit) controls the execution of the microcontroller hardware by generating various micro-operation control signals, including the following main parts:
[0055] Control Unit (CU): This is the core part of the controller, responsible for analyzing instructions and issuing control signals.
[0056] Instruction Register (IR): stores the currently executed instruction.
[0057] Program Counter (PC): stores the address of the next instruction, with an automatic increment function.
[0058] Instruction Decoder (ID): decodes instructions.
[0059] Timing System: provides control timing.
[0060] Micro-operation signal generator: generates various micro-operation control signals, which are formed by decoding signals provided by the instruction decoder (ID), timing signals provided by the timing system, and the state and conditions fed back by the controlled functional components (i.e. battery cells).
[0061] The specific control process can be implemented according to related technologies, which will not be described here.
[0062] It should be noted that, in addition to the hardware circuit implementation of the control function, the main controller can also use a control algorithm to implement the control function, to send a control instruction to the microprocessor, so that the microcontroller controls the switching operation of the MOS drive switch and the acquisition operation of the voltage monitoring element, the temperature monitoring element and the thermal runaway monitoring element according to the control instruction of the main controller.
[0063] The cell attribute parameter threshold value includes a cell voltage threshold value and a cell temperature threshold value, and the thermal runaway monitoring point attribute parameter threshold value includes a valve port temperature threshold value and a valve port humidity threshold value of the explosion-proof valve. The setting of the above threshold values is related to the rated voltage of the cell. When the collected cell voltage is greater than the cell voltage threshold value or the collected cell voltage is greater than the cell voltage threshold value and the cell temperature is greater than the cell temperature threshold value, it is determined that the cell has thermal runaway; or the valve port temperature of the explosion-proof valve is greater than the valve port temperature threshold value of the explosion-proof valve and / or the valve port humidity of the explosion-proof valve is greater than the valve port humidity threshold value, it is determined that the cell has thermal runaway, and the deviation between each index in the cell attribute parameter and each threshold value is calculated respectively, and the deviation between each index in the thermal runaway monitoring point attribute parameter and each threshold value is calculated respectively, and the two deviations are taken as the thermal runaway risk index.
[0064] When thermal runaway occurs, the CU controlled by the signal generator sends a control instruction to the microcontroller, and the microcontroller controls the MOS drive switch to bypass the corresponding thermal runaway cell.
[0065] Taking the voltage acquisition control unit 1 as an example, when one of the cells connected thereto has thermal runaway, the MOS drive switch is turned off to bypass the cell having thermal runaway, thereby preventing the normal work of other cells.
[0066] In combination Figure 8 The process of monitoring the state of the integrated cell by the thermal runaway monitoring system is described as follows:
[0067] Before starting, the integrated battery cell out-of-control monitoring system is in a dormant state, is awakened through a communication bus of a main controller, controls each battery cell acquisition control unit to acquire attribute parameters of the battery cell and attribute parameters of each thermal runaway monitoring point, and checks a database to determine whether the data is N=N+1. When N=N+1 (the first test is an error, and the second test is an error; it is indicated that the system is indeed in a thermal runaway state; emergency response, protection of the battery, fire alarm; reporting to the host, maintenance personnel maintenance, etc.), the main controller outputs a judgment result, including: a thermal runaway risk index, trigger event 1 / 2, trigger event 3 (the trigger event refers to a thermal runaway event). When N=2, a safety operation is performed, that is, a MOS drive switch is used to bypass the thermal runaway battery cell, so that the thermal runaway battery cell is disconnected from the entire battery cell group string. The main controller also reports the execution result and the attribute parameter acquisition of the battery cell, the attribute parameter of each thermal runaway monitoring point, and the thermal runaway detection result, and outputs an error interrupt signal (the interrupt function is realized by leading a low-level signal output signal line to the main controller).
[0068] The life test is performed for each battery cell, including: 1, a large number of cycle test data of the battery cell, including: resistance and voltage corresponding lines. 2, failure test, failure initiation process data. 3, thermal runaway test, failure initiation process data. The test data is stored in an MCU external device of the controller.
[0069] As shown in Figure 9 The main controller also judges the external load condition of the battery cell in the battery pack, whether there is an external demand state such as overcurrent and overtemperature. The energy of the battery cell is obtained by calculating the charge of the battery cell, and safety management is performed. All battery cell data are judged and error interrupt data are detected, and whether the energy in all battery cell monomers exceeds the average value is judged. If yes, an energy equalization operation is performed, that is, the battery cell with an energy value exceeding the average value is discharged and bypassed, or the battery cell with an energy value lower than the average value is charged and bypassed, so that the energy of the battery cell is restored to balance.
[0070] The integrated battery cell out-of-control monitoring system provided in the embodiment realizes the purpose of point-to-point battery cell control through the internal structure of the battery cell acquisition control unit, timely adjusts the monomer energy flow strategy, optimizes the monomer energy short board, and removes the failure risk source.
[0071] In an alternative embodiment, the plurality of series-connected cell acquisition control units and the plurality of battery packs formed by the series connection of the plurality of cells are independently structured, or the plurality of series-connected cell acquisition control units and the plurality of battery packs formed by the series connection of the plurality of cells are integrally structured. The independent structure can be that the plurality of series-connected cell acquisition control units are arranged as a single module, the plurality of battery packs formed by the series connection of the plurality of cells are arranged as a single module, and the two single modules are electrically connected in a set connection mode. The integrated structure is that the plurality of series-connected cell acquisition control units and the plurality of battery packs formed by the series connection of the plurality of cells are packaged as an integrated structure. As shown in FIG. Figure 5 The plurality of series-connected cell acquisition control units and the plurality of battery packs formed by the series connection of the plurality of cells are packaged as an integrated structure.
[0072] The integrated cell runaway monitoring system provided in the embodiment can select a plurality of setting structures to design the connection relationship between the plurality of series-connected cell acquisition control units and the plurality of battery packs formed by the series connection of the plurality of cells, and has the advantages of flexible design and reliable performance.
[0073] In the embodiment, a battery device is also provided, as shown in FIG. Figure 6 The battery device comprises: Figure 2 and Figure 3 As shown in FIG. 1 and FIG. 2, the integrated cell runaway monitoring system and the cell spine in the energy management system of the integrated cell, each cell acquisition control unit in the energy management system of the integrated cell is connected to a preset number of cells in the battery pack and a main controller to form a single monitoring module, and a plurality of single monitoring modules are packaged through the cell spine to form a battery device.
[0074] The further functions of the modules and units in the integrated cell runaway monitoring system are the same as those in the above-mentioned corresponding embodiments, and will not be described here.
[0075] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.
Claims
1. An integrated cell run-away monitoring system, comprising: The system comprises a plurality of series-connected battery cell collection control units, a battery pack formed by a plurality of series-connected battery cells, and a main controller; each battery cell collection control unit is provided with a same number of thermal runaway monitoring points as the number of battery cells in the battery pack; Each battery cell collection control unit is respectively connected to a preset number of battery cells in the battery pack and the main controller; each thermal runaway monitoring point is respectively connected to each battery cell in the battery pack; When the battery pack formed by the plurality of series-connected battery cells is working, each battery cell collection control unit collects the attribute parameters of the corresponding connected battery cells and the attribute parameters of each thermal runaway monitoring point and transmits them to the main controller; the main controller judges whether the corresponding battery cell has thermal runaway based on the attribute parameters of the battery cell and the attribute parameters of each thermal runaway monitoring point; when the battery cell has thermal runaway, the battery cell collection control unit connected to the battery cell bypasses the thermal runaway battery cell.
2. The system of claim 1, wherein, Each battery cell collection control unit further comprises a MOS drive switch, a voltage monitoring element, a temperature monitoring element, a thermal runaway monitoring element, and a microcontroller; the attribute parameters of the battery cell include the battery cell voltage and the battery cell temperature; the attribute parameters of the thermal runaway monitoring point include the temperature and humidity of each thermal runaway monitoring point; The MOS drive switch, the voltage monitoring element, the temperature monitoring element, and the thermal runaway monitoring element are all connected to the microcontroller; The MOS drive switch is used to control the opening and closing of the battery cell; the voltage monitoring element is used to collect the battery cell voltage of the corresponding battery cell; the temperature monitoring element is used to collect the battery cell temperature of the corresponding battery cell; and the thermal runaway monitoring element is used to collect the temperature and humidity of each thermal runaway monitoring point; The microcontroller is used to control the switching operation of the MOS drive switch and the collection operation of the voltage monitoring element, the temperature monitoring element, and the thermal runaway monitoring element according to the control instruction of the main controller.
3. The system of claim 2, wherein, Each thermal runaway monitoring point is connected to an explosion-proof valve in the corresponding battery cell; the temperature and humidity of each thermal runaway monitoring point are the valve port temperature and valve port humidity of the explosion-proof valve, respectively; The thermal runaway monitoring element is further used to collect the valve port temperature and valve port humidity of the explosion-proof valve in the corresponding battery cell.
4. The system of claim 1, wherein, Each battery cell collection control unit further comprises a voltage regulating circuit, which is connected to each battery cell in the battery pack; the voltage regulating circuit is used to adjust the input voltage of each battery cell.
5. The system of claim 2, wherein, Each battery cell collection control unit further comprises an isolation communication module, which is respectively connected to the microcontroller and the main controller; the isolation communication module is used for communication between the microcontroller and the main controller.
6. The system of claim 2, wherein, The main controller comprises a comparator and an interrupt control chip; the interrupt control chip comprises an input-output interface and a signal generator control CU; The comparator is used to receive the attribute parameters of each battery cell and the attribute parameters of each thermal runaway monitoring point, and compare the attribute parameters of each battery cell and the attribute parameters of each thermal runaway monitoring point with the corresponding battery cell attribute parameter threshold and the corresponding thermal runaway monitoring point attribute parameter threshold, respectively, to judge whether the corresponding battery cell has thermal runaway; The main controller is connected to the microcontroller through the input-output interface; the signal generator control CU is used to send a control instruction to the microcontroller.
7. The system as claimed in claim 6, wherein, When thermal runaway occurs, the CU controlled by the signal generator sends control instructions to the microcontroller, which controls the MOS drive switch to bypass the corresponding thermal runaway cell.
8. The system as recited in claim 1, wherein, The plurality of series-connected cell acquisition control units and the battery pack formed by the plurality of series-connected cells are independently structured.
9. The system as recited in claim 1, wherein, The plurality of series-connected cell acquisition control units and the battery pack formed by the plurality of series-connected cells are integrally structured.
10. A battery device characterized by comprising: The device comprises the integrated cell runaway monitoring system and the cell spine according to any one of claims 1 to 9; Each of the cell acquisition control units in the integrated cell energy management system is respectively connected to a preset number of cells in the battery pack and a main controller to form a single monitoring module, and a plurality of single monitoring modules are encapsulated through the cell spine to form a battery device.